JP2014011101A - Power storage device, and construction machine equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembling of a storage battery cover to a supporting member for supporting a storage battery, and to improve flexibility in a layout of a power storage device.SOLUTION: A power storage device includes: a storage battery 22; a cooling plate 21 having an upper surface 21a for supporting the storage battery 22; and a storage battery cover 23 installed to an installation position set on the cooling plate 21 to cover the storage battery 22. The storage battery cover 23 is equipped with an outside wall 30; an installing portion 32 extending outward from the outside wall 30 along the upper surface 21a of the cooling plate 21, and installed to the cooling plate 21; and a positioning portion 33 for positioning the storage battery cover 23 at the installation position. The installing portion 32 is provide only in a part of a range around a shaft orthogonal to the upper surface 21a of the cooling plate 21. The positioning portion 33 is provided in a range around the shaft other than the range in which the installing portion 32 is provided, and has a contact surface 33d contacting with the cooling plate 21 in a direction parallel with the upper surface 21a of the cooling plate 21.

Description

  The present invention relates to a power storage device including a storage battery, a support member that supports the storage battery from below, and a storage battery cover that is attached to the support member so as to cover the storage battery from above and from the side, and a construction machine including the power storage device. It is.

  Conventionally, for example, a capacitor module described in Patent Document 1 is known. The capacitor module includes a capacitor cell (storage battery), a cooling plate (support member) on which the capacitor cell is placed, and an upper cover (storage battery cover) attached to the upper surface of the cooling plate so as to cover the capacitor cell from above. It has.

  The upper cover includes a covering portion that covers the capacitor cell from above and from the side, and a flange portion that extends outward from the opening end of the covering portion. The upper cover is attached to the cooling plate with only the lower surface of the flange portion in contact with the upper surface of the cooling plate. The flange portion is provided over the entire circumference of the opening end of the covering portion. In addition, the flange portion is formed with a hole for inserting the bolt in the vertical direction, and an insertion hole for allowing the bolt inserted in the hole portion to be inserted in the vertical direction is formed in the cooling plate. Yes.

JP 2008-187046 A (particularly paragraph 0047)

  However, in the capacitor module described in Patent Document 1, the upper cover is placed on the upper surface of the cooling plate without being restricted by the moving range, and the flange portion is provided over the entire circumference of the opening end of the covering portion. Yes. Therefore, there is a problem that the work of attaching the upper cover to the cooling plate becomes complicated and the degree of freedom of layout of the capacitor module is low.

  Specifically, when the upper cover is attached to the cooling plate, it is necessary to align the hole of the flange and the hole of the cooling plate so that the bolt can be inserted. However, since the upper cover is placed on the upper surface of the cooling plate without being restricted by the moving range, the upper cover can move in all horizontal directions with respect to the cooling plate. Therefore, it is difficult to align the hole of the flange and the insertion hole of the cooling plate.

  Moreover, the said flange part is provided over the perimeter of the opening end of a coating | coated part. For this reason, the size of the upper cover increases in the range over the entire circumference of the covering portion from the viewpoint seen from above, and accordingly, the cooling plate also increases. Accordingly, the size of the capacitor module when viewed from above is increased, and the layout of the capacitor module is limited in relation to the devices provided around it.

  An object of the present invention is to facilitate the assembly of a storage battery cover to a support member that supports the storage battery and to improve the degree of freedom of the layout of the power storage device.

  In order to solve the above problems, the present invention is a power storage device provided in a construction machine, and is set on a storage battery, a support member having an upper surface for supporting the storage battery from below, and the support member A storage battery cover capable of covering the storage battery supported on the support member from above and from the side by being mounted at the mounting position, and the storage battery cover being attached to the mounting position on the side of the storage battery An outer wall covering from the outer side, an attachment portion that extends outward from the outer wall along the upper surface of the support member and is attached to the support member in a state of contacting the upper surface of the support member at the attachment position, and the storage battery cover At least one positioning portion for positioning the mounting member at the mounting position, and the mounting portion is in a partial range around an axis orthogonal to the upper surface of the support member. The positioning portion is provided in a range other than the range in which the mounting portion is provided around the axis and has a contact surface that contacts the support member in a direction parallel to the upper surface of the support member. A power storage device is provided.

  In the present invention, the attachment portion extending outward from the outer wall is provided only in a partial range around the axis orthogonal to the upper surface of the support member. That is, the attachment portion can be omitted in a part around the axis. Thereby, compared with the conventional structure in which the flange part was formed over the perimeter of the coating | coated part, the magnitude | size of the storage battery cover in the viewpoint seen from a top can be made small, and a support member can also be made small in connection with this. it can. Therefore, according to the present invention, since the size of the power storage device viewed from above can be reduced, the degree of freedom in layout of the power storage device can be improved.

  In the present invention, the positioning portion is provided in a range other than the range in which the attachment portion is provided around the axis. And a positioning part has a contact surface which contacts a support member in the direction parallel to the upper surface of a support member in an attachment position. By this contact surface, the movement of the storage battery cover along the upper surface of the support member is restricted at the mounting position. For this reason, the upper cover placed on the upper surface of the cooling plate is moved along the upper surface of the cooling plate without being restricted by the movement range, thereby comparing with the conventional capacitor module that aligns the position of the upper cover and the cooling plate. Thus, the storage battery cover can be easily positioned with respect to the support member. Therefore, according to the present invention, the storage battery cover can be easily assembled to the support member.

  In the power storage device, it is preferable that the positioning portion includes a portion extending downward from the outer wall, and the contact surface contacts a side end surface of the support member at the attachment position.

  In this aspect, the contact surface of the positioning portion extending downward from the outer wall contacts the side end surface of the support member. That is, the part which contacts a contact surface among the side end surfaces of a supporting member is arrange | positioned inside a positioning part. Thereby, the magnitude | size of a support member can be reduced so that a part of support member may hide under a storage battery cover seeing from the top. Therefore, a support member can be made small compared with the conventional cooling plate which has a magnitude | size which can mount the flange formed over the perimeter of the coating | coated part.

  In the power storage device, the support member is formed with a concave portion that opens upward, and the positioning portion includes a portion that extends downward from the outer wall so that the concave portion can be inserted into the concave portion from above. The contact surface is preferably in contact with the inner surface of the recess.

  In this aspect, the positioning portion is configured by a portion extending downward from the outer wall so that the concave portion of the support member can be inserted from above. Therefore, the storage battery cover can be positioned on the support member by inserting the positioning portion into the recess. Moreover, in this aspect, the attachment portion is provided over the entire circumference of the outer wall by setting the range from the recess to the side edge of the support member to be smaller than the range in which the attachment portion extends from the outer wall of the storage battery cover. Compared to the case, the support member can be made smaller.

  In the power storage device, the positioning unit includes an elastic unit and a clamping unit that clamps the elastic unit with the support member so that the elastic unit is elastically deformed when the contact surface comes into contact with the support member. It is preferable to further comprise.

  In this aspect, when the contact surface comes into contact with the support member, the elastic portion is elastically deformed between the pinching portion and the support member. Thereby, it can suppress that a clearance gap is formed between a support member and a positioning part in the state in which the storage battery cover was positioned in the attachment position. Therefore, in a state where the storage battery cover is attached to the support member, foreign matter (water, dust, etc.) can be prevented from entering the storage battery cover through the support member and the positioning portion.

  In the power storage device, it is preferable that the storage battery cover has two positioning portions, and contact surfaces of the positioning portions are orthogonal to each other.

  In this aspect, two contact surfaces that are orthogonal to each other are provided. Thereby, the position of the storage battery cover on the upper surface of the support member can be adjusted two-dimensionally (two directions) by bringing each contact surface into contact with the support member.

  In addition, the present invention provides a first vertical plate and a first vertical plate that are erected on the base frame at positions away from both left and right ends of the base frame so as to face each other in the left-right direction and extend in the front-rear direction. Two vertical plates, a work attachment supported by the vertical plates between the vertical plates so as to be raised and lowered, and provided on the base frame at a position opposite to the second vertical plate with respect to the first vertical plate. The power storage device according to claim 4, and a covering member that covers the power storage device from a side opposite to the first vertical plate, wherein the covering member moves upward as viewed from the front. The power storage device includes an inclined portion that is inclined so as to approach the first vertical plate side, and the power storage device is disposed such that the positioning portion faces the first vertical plate and the attachment portion faces the inclined portion. Provide construction machinery .

  In the present invention, the power storage device is arranged so that the positioning portion faces the first vertical plate and the attachment portion faces the inclined portion. Thereby, the width dimension of the base frame can be reduced, and the power storage device can be efficiently arranged within the range limited by the covering member.

  Specifically, the inclined portion of the covering member is inclined so as to be closer to the first vertical plate side as it goes upward from the viewpoint viewed from the front. On the other hand, on the side where the mounting portion of the power storage device is provided, the support member protrudes outside the outer wall at a position below the outer wall as viewed from the front. Therefore, a support member and a storage battery cover can be arrange | positioned along an inclination part by arrange | positioning so that an attaching part may face an inclination part. On the other hand, on the side where the positioning portion of the power storage device is provided, the outer wall of the storage battery cover and the side end surface of the support member are arranged in the vertical direction as viewed from the front. Therefore, by arranging the power storage device so that the positioning portion faces the first vertical plate, the power storage device is arranged in the first vertical plate as compared with the case where the power storage device is arranged so that the attachment portion faces the first vertical plate. Can be approached. Therefore, the width dimension of the base frame can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the assembly | attachment of the storage battery cover with respect to the supporting member which supports a storage battery can be performed easily, and the freedom degree of the layout of an electrical storage apparatus can be improved.

It is a right view which shows the whole structure of the construction machine which concerns on 1st Embodiment of this invention. It is the schematic which shows the drive system of the construction machine shown in FIG. It is a front fragmentary sectional view of the construction machine shown in FIG. It is a top view of the electrical storage apparatus shown in FIG. It is the VV sectional view taken on the line of FIG. It is sectional drawing which expands and shows a part of FIG. It is a top view which shows the electrical storage apparatus which concerns on 2nd Embodiment. It is the VIII-VIII sectional view taken on the line of FIG. FIG. 7 is a diagram corresponding to FIG. 6 illustrating a power storage device according to a third embodiment. FIG. 6 is a diagram corresponding to FIG. 5 illustrating a power storage device according to a fourth embodiment.

  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.

(First embodiment)
A hybrid excavator 1 as an example of a construction machine according to the first embodiment will be described with reference to FIG. The hybrid excavator 1 includes a lower traveling body 2 having a crawler 2a, an upper revolving body 3 that is turnably provided on the lower traveling body 2, and a work attachment 4 that is supported by the upper revolving body 3 so as to be raised and lowered. It has. First, the work attachment 4 will be described.

  The work attachment 4 includes a boom 5 having a base end portion supported by the upper swing body 3 so as to be raised and lowered, an arm 6 having a base end portion rotatably supported by the tip end portion of the boom 5, and the arm 6. And a bucket 7 rotatably supported at the tip. The work attachment 4 also includes a boom cylinder 8 that raises and lowers the boom 5 relative to the upper swing body 3, an arm cylinder 9 that rotates the arm 6 relative to the boom 5, and a bucket 7 that rotates relative to the arm 6. And a bucket cylinder 10 to be operated.

  Next, the function of the hybrid excavator 1 will be described with reference to FIG.

  The hybrid excavator 1 operates the hydraulic actuator Ac using the power of the engine 15 and the power of the storage battery 22. Specifically, a generator motor 16 and a variable displacement hydraulic pump 17 are connected to the output shaft of the engine 15. The generator motor 16 functions as a generator that generates power by the power of the engine 15 under the control of the inverter 19, or functions as a motor by the power of the storage battery 22. The electric power generated by the generator motor 16 is charged in the storage battery 22. Further, the generator motor 16 operates as an electric motor by the electric power of the storage battery 22, thereby assisting the driving of the engine 15. The hydraulic pump 17 discharges hydraulic oil by receiving power from the engine 15 and / or the generator motor 16. The hydraulic oil discharged from the hydraulic pump 17 is guided to the hydraulic actuator Ac via the control valve 18. The hydraulic actuator Ac according to the present embodiment includes a boom cylinder 8, an arm cylinder 9, a bucket cylinder 10, and a turning motor (not shown) for turning the upper turning body. Further, between the storage battery 22 and the inverter 19, a power line 25 for exchanging electric power between the storage battery 22 and the generator motor 16 and a state quantity (for example, charge amount) of the storage battery 22 are transmitted to the inverter 19. An external control line 27 is provided.

  Hereinafter, the configuration of the upper swing body 3 will be described with reference to FIGS. 2 and 3.

  The upper swing body 3 includes an upper frame (base frame) 11 that is pivotably attached to the lower traveling body 2, a right vertical plate (first vertical plate) 12A provided on the upper frame 11, and a left Vertical plate (second vertical plate) 12B, cab 14, engine 15, generator motor 16, hydraulic pump 17, control valve 18, inverter 19, power storage device 20, power line 25, external control line 27, and exterior panel (covering) Member) 46. In the following description, the description will be made using the front-rear and left-right directions as viewed from the operator seated on the seat in the cab 14.

  The right vertical plate 12A and the left vertical plate 12B are erected on the upper frame 11 at positions away from the left and right ends of the upper frame 11 so as to face each other in the left-right direction and extend in the front-rear direction. Specifically, each of the vertical plates 12 </ b> A and 12 </ b> B is provided at a substantially central position in the left-right direction of the upper frame 11. The work attachment 4 is supported by the vertical plates 12A and 12B so as to be raised and lowered between the front portions of the vertical plates 12A and 12B.

  The inverter 19 and the power storage device 20 are provided on the right front portion of the upper frame 11. Specifically, the inverter 19 and the power storage device 20 are provided at a position opposite to the left vertical plate 12B with respect to the right vertical plate 12A (a position on the right side of the right vertical plate 12A). In the present embodiment, the inverter 19 is placed on the upper frame 11, and the power storage device 20 is placed on the inverter 19.

  Referring to FIGS. 3 to 5, inverter 19 is substantially formed in a rectangular parallelepiped. Further, as shown in FIG. 4, the inverter 19 is arranged such that its four side surfaces are directed in the front-rear and left-right directions.

  The power storage device 20 is attached to the cooling plate 21 so as to cover the cooling plate (support member) 21 provided on the inverter 19, the storage battery 22 provided on the cooling plate 21, and the storage battery 22 from above and from the side. Storage battery cover 23, bus bar 24 provided in storage battery cover 23 and electrically connected to storage battery 22, internal control line 26 electrically connected to storage battery 22, and end of internal control line 26 And a connector 28 connected to the section.

  The cooling plate 21 is for cooling the storage battery 22. Specifically, the cooling plate 21 has a refrigerant passage formed therein, and the refrigerant flowing through the refrigerant passage removes heat from the storage battery 22 to cool the storage battery 22. Moreover, the cooling plate 21 is formed in the substantially rectangular parallelepiped which has the side surface arrange | positioned so that it may each follow along the front-back, left-right direction. Specifically, the cooling plate 21 has a right side surface 21b facing right, a left side surface 21c facing left, a front side surface 21d facing front, and a rear side surface 21e facing rear. Moreover, the cooling plate 21 has the upper surface 21a for supporting the storage battery 22 from the bottom.

  The storage battery 22 includes a battery main body 22a placed on the upper surface 21a of the cooling plate 21, and a terminal 22b protruding leftward from the upper part of the left side surface of the battery main body 22a.

  The storage battery cover 23 includes an outer wall 30 that covers the storage battery 22 from the side, and an inner wall 31 that is provided on the storage battery 22 and extends in the vertical direction at an inner position of the outer wall 30 from the viewpoint of viewing the storage battery 22 from above. A mounting portion 32 and a positioning portion 33 provided in the lower portion of the outer wall 30; a shoulder portion 34 connecting the upper portion of the outer wall 30 and the lower portion of the inner wall 31; and a connector support portion provided in the inner wall 31. 35 and a detachable lid 29 on the upper part of the inner wall 31.

  The outer side wall 30 is a wall that covers the storage battery 22 from the side over the entire circumference around the axis along the vertical direction. Specifically, the outer wall 30 includes a right side wall 36 facing right, a left side wall 37 facing left, a front side wall 38 facing front, and a rear side wall 39 facing rear.

  The inner wall 31 is a wall provided over the entire circumference around the axis along the vertical direction. Specifically, the inner wall 31 includes a right inner wall 40 facing right, a left inner wall 41 facing left, a front inner wall 42 facing front, and a rear inner wall 43 facing rear. The right inner wall 40 is formed with a through hole 40a for passing an external control line 27 described later. Further, the left inner wall 41 is formed with a through hole 41a for passing a power line 25 described later. In addition, the inner wall 31 is formed with an opening 44 (see FIG. 5) for opening an inner region of each of the walls 40 to 43 upward. The opening 44 can be opened and closed by attaching and detaching the lid 29 to the upper part of the inner wall 31.

  The attachment portion 32 is for attaching the storage battery cover 23 to the upper surface 21 a of the cooling plate 21. Further, the attachment portion 32 is provided only in a partial range around the axis along the vertical direction in the lower end portion of the outer wall 30. Further, the attachment portion 32 extends from the outer wall 30 along the upper surface 21 a of the cooling plate 21 and is attached to the cooling plate 21 in contact with the upper surface 21 a of the cooling plate 21. Specifically, the attachment portion 32 includes a right flange 32 a extending rightward from the lower end portion of the right wall 36 of the outer wall 30, a front flange 32 b extending frontward from the lower end portion of the front side wall 38 of the outer wall 30, and the outer wall 30. And a rear flange 32c extending rearward from the lower end of the rear side wall 39. Each flange 32a-32c is formed with an insertion hole (not shown) through which the bolt B1 is passed from above. The lower end of the bolt B1 is screwed into a female screw (not shown) formed on the cooling plate 21. That is, the female screw of the cooling plate 21 defines an attachment position for attaching the attachment portion 32.

  Referring to FIG. 6, positioning portion 33 is for positioning storage battery cover 23 at the mounting position of cooling plate 21. Further, the positioning portion 33 is provided in a range other than the range in which the mounting portion 32 is provided around the axis along the vertical direction in the lower end portion of the outer wall 30. Specifically, the positioning portion 33 includes an extension portion 33a that extends downward from the lower end portion of the left side wall 37 of the outer wall 30, and a folded portion that is folded from the inner side (right side) with respect to the lower end portion of the extension portion 33a. 33b and an elastic portion 33c provided on the inner side of the extension portion 33a on the folded portion 33b. The extension portion 33a and the folded portion 33b can be formed by performing bending processing (for example, hemming bending) on one metal plate. In the present embodiment, the inner side surface (right side surface) of the folded portion 33 b constitutes a contact surface 33 d that contacts the cooling plate 21 in a direction parallel to the upper surface 21 a of the cooling plate 21. Specifically, the contact surface 33d contacts the left side surface (side end surface) 21c of the cooling plate 21 from the left side. By this contact, the storage battery cover 23 is positioned in the left-right direction with respect to the cooling plate 21. Specifically, the bolt B1 insertion hole (not shown) formed in each of the flanges 32a to 32c and the female screw portion (not shown) formed in the cooling plate 21 can be positioned in the left-right direction. it can. The elastic part 33c suppresses foreign substances (water, dust, etc.) from passing between the extension part 33a and the left side surface 21c of the cooling plate 21. Specifically, the elastic portion 33 c is sandwiched between the extension portion 33 a and the left side surface 21 c of the cooling plate 21 while being elastically deformed.

  As described above, in the present embodiment, the positioning portion 33 is provided on the left side of the storage battery cover 23 instead of the attachment portion (flange) on the left side of the storage battery cover 23. Thereby, compared with the case where a flange is provided in the both right and left sides of the storage battery cover 23, the electrical storage apparatus 20 can be made small in the left-right direction. Therefore, the power storage device 20 can be arranged at a position closer to the right vertical plate 12A. Specifically, as shown in FIGS. 2 and 5, the power storage device 20 is connected to the inverter 19 so that the left side wall 37 of the outer wall 30 and the left side surface of the inverter 19 are vertically aligned at the starting point seen from the front. Is positioned.

  Further, as described above, since the power storage device 20 is disposed on the left side on the inverter 19, the power storage device 20 can be efficiently disposed in the exterior panel 46. Specifically, the exterior panel 46 includes a top plate 46a that covers the power storage device 20 and the inverter 19 from above, a side plate 46b that rises from the right edge of the upper frame 11, an upper end portion of the side plate 46b, and a right end portion of the top plate 46a. And an inclined plate (inclined portion) 46c to be connected. The top plate 46a is provided in a range on the left side of the side plate 46b as viewed from above. Therefore, the inclined plate 46c is inclined to the left as it goes upward. On the other hand, as described above, by arranging the power storage device 20 on the left side on the inverter 19, the outer wall 30 (right side wall 36) of the storage battery cover 23 can be arranged on the left side of the right side surface of the inverter 19. it can. Therefore, inverter 19 can be arranged on the left side of side wall 46b, and power storage device 20 can be arranged on the left side of inclined plate 46c.

  Further, the power storage device 20 is disposed such that the positioning portion 33 faces the right vertical plate 12A and the right flange 32a of the mounting portion 32 faces the inclined plate 46c. Thereby, the width dimension of upper frame 11 can be reduced, and power storage device 20 can be efficiently arranged within the range limited by exterior panel 46. Specifically, on the side where the right flange 32a of the power storage device 20 is provided, the cooling plate 21 protrudes outside the outer wall 30 at a position below the outer wall 30 as viewed from the front. Therefore, the cooling plate 21 and the storage battery cover 23 can be disposed along the inclined plate 46c by arranging the right flange 32a so as to face the inclined plate 46c. On the other hand, on the side where the positioning unit 33 of the power storage device 20 is provided, the outer wall 30 of the storage battery cover 23 and the right side surface 21b of the cooling plate 21 are arranged in the vertical direction as viewed from the front. Therefore, by arranging the power storage device 20 so that the positioning portion 33 faces the first vertical plate 12A, it is possible to store the power storage device 20 as compared with the case where the power storage device 20 is arranged so that the attachment portion 32 faces the first vertical plate 12A. The device 20 can be brought close to the first vertical plate 12A. Therefore, the width dimension of the upper frame 11 can be reduced.

  Referring to FIG. 5, bus bar 24 includes a terminal connection portion 24a connected to the left side surface of terminal 22b of storage battery 22, an extension portion 24b extending from the upper end portion of terminal connection portion 24a to the right side, and an extension portion 24b. A raised portion 24c extending upward from the right end of the raised portion and an attaching portion 24d provided at the upper end of the raised portion 24c are provided. 24 d of attachment parts can attach the base end part of the power line 25 in the height position above the storage battery 22 and the equivalent to the through-hole 41a. Specifically, the height position of the attachment portion 24d is adjusted by the lengths of the terminal connection portion 24a and the raised portion 24c.

  The internal control line 26 electrically connects the storage battery 22 and the connector 28. The connector 28 can attach the external control line 27 above the storage battery 22 and at a height position equivalent to the through hole 40a. Specifically, the height position of the connector 28 is adjusted by the support position of the connector 28 by the connector support portion 35 provided in the inner wall 31 of the storage battery cover 23.

  In the present embodiment, the bus bar 24 constitutes a conduction member for the power line 25, and the internal control line 26 and the connector 28 constitute a conduction member for the external control line 27. Further, the connector 28 constitutes an attachment portion for the external control line 27.

  The power line 25 has a proximal end portion electrically connected to the storage battery 22 and a distal end portion electrically connected to the inverter 19. Specifically, the base end portion of the power line 25 is electrically connected to the mounting portion 24 d of the bus bar 24. Further, the power line 25 is bent downwardly on the outer side of the storage battery cover 23 and a horizontal part 25a extending substantially horizontally so as to be led out from the inner side of the storage battery cover 23 through the through hole 41a from the mounting part 24d. The bent portion 25b and an extending portion 25c extending downward from the bent portion 25b. A portion of the power line 25 on the tip side of the extending portion 25 c is led to the front side of the inverter 19 and connected to the inverter 19 as shown in FIG. 4. A part of the bent portion 25b is provided at a position overlapping the inner range of the outer wall 30 from the viewpoint of viewing the storage battery 22 from above. Specifically, a part of the bent portion 25 b is provided in a range E <b> 1 between the left inner wall 41 of the inner wall 31 and the left wall 37 of the outer wall 30 as shown in FIG. 3. The extending portion 25 c extends from the bent portion 25 b along the outer wall 30 (left side wall 37) of the storage battery cover 23 and the left side surface of the inverter 19. Specifically, the extending portion 25c has a range E2 between the outer wall 30 (left side wall 37) of the storage battery cover 23 and the left side surface of the inverter 19 and the right vertical plate 12A arranged in the vertical direction from the viewpoint viewed from the front. Wired through.

  As shown in FIG. 5, the external control line 27 has a proximal end portion connected to the storage battery 22 and a distal end portion electrically connected to the inverter 19. Specifically, the base end portion of the external control line 27 is connected to a connector (not shown) that can be connected to the connector 28. The external control line 27 has a horizontal portion 27a extending substantially horizontally so as to be led out from the inside to the outside of the storage battery cover 23 through the through hole 40a from the base end portion thereof, and downward on the outside of the storage battery cover 23. And a bent portion 27b bent downward and an extending portion 27c extending downward from the bent portion 27b. A portion of the external control line 27 on the tip side of the extending portion 27 c is led to the front side of the inverter 19 and connected to the inverter 19 as shown in FIG. 4. A part of the bent portion 27b is provided at a position overlapping the range E3 inside the outer wall 30 from the viewpoint of viewing the storage battery 22 from above. Specifically, a part of the bent portion 27b is provided in a range E3 between the right inner wall 40 of the inner wall 31 and the right wall 36 of the outer wall 30 as shown in FIG. The extending portion 27 c extends from the bent portion 27 b along the outer wall 30 (right side wall 36) of the storage battery cover 23. Specifically, the extending portion 27c is a range E4 (virtual extension of the upper surface of the storage battery cover 23) between the outer wall 30 (right side wall 36) of the storage battery cover 23 and the inclined plate 46c of the exterior panel 46 from the viewpoint viewed from the front. A range between the intersection of the line and the inclined plate 46c and the storage battery cover 23).

  In the embodiment, the attachment portion 32 extending outward from the outer wall 30 is provided only in a partial range around the axis orthogonal to the upper surface 21 a of the cooling plate 21. That is, the attachment portion 32 can be omitted in a part around the axis. Thereby, compared with the conventional structure in which the flange part was formed over the perimeter of the coating | coated part, the magnitude | size of the storage battery cover 23 in the viewpoint seen from the top can be made small, and the cooling plate 21 is also made small in connection with this. be able to. Therefore, according to the embodiment, since the size of the power storage device 20 viewed from above can be reduced, the degree of freedom of the layout of the power storage device 20 can be improved.

  In the embodiment, the positioning portion 33 is provided in a range other than the range in which the attachment portion 32 is provided around the axis. And the positioning part 33 has the contact surface 33d which contacts the cooling plate 21 in the direction parallel to the upper surface 21a of the cooling plate 21 in an attachment position. The contact surface 33d restricts the movement of the storage battery cover 23 along the upper surface 21a of the cooling plate 21 at the mounting position. For this reason, the upper cover placed on the upper surface of the cooling plate is moved along the upper surface of the cooling plate without being restricted by the movement range, thereby comparing with the conventional capacitor module that aligns the position of the upper cover and the cooling plate. Thus, positioning of the storage battery cover 23 with respect to the cooling plate 21 is facilitated. Therefore, according to the embodiment, the storage battery cover 23 can be easily assembled to the cooling plate 21.

  In the embodiment, the elastic portion 33 c is elastically deformed between the extension portion 33 a and the cooling plate 21 when the contact surface 33 d contacts the cooling plate 21. Thereby, it can suppress that a clearance gap is formed between the cooling plate 21 and the positioning part 33 in the state in which the storage battery cover 23 was positioned by the attachment position. Therefore, in a state where the storage battery cover 23 is attached to the cooling plate 21, it is possible to prevent foreign matters (water, dust, etc.) from entering the storage battery cover 23 through between the cooling plate 21 and the positioning portion 33. .

  In the embodiment, the contact surface 33 d of the positioning portion 33 extending downward from the outer wall 30 contacts the left side surface 21 c of the cooling plate 21. That is, the portion (left side surface 21 c) that contacts the contact surface of the side end surface of the cooling plate 21 is disposed inside the positioning portion 33. Thereby, the size of the cooling plate 21 can be reduced so that a part of the cooling plate 21 is hidden under the storage battery cover 23 when viewed from above. Therefore, the cooling plate 21 can be made smaller compared to a conventional cooling plate having a size capable of mounting a flange formed over the entire circumference of the covering portion.

(Second Embodiment)
Hereinafter, the power storage device 20 according to the second embodiment will be described with reference to FIGS. 7 and 8. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the power storage device 20 according to the second embodiment, the storage battery cover 23 includes a positioning portion 47 instead of the rear flange 32c.

  The positioning portion 47 extends downward from the lower end portion of the outer wall 30 (rear side wall 39) of the storage battery cover 23, and is folded back from the inner side (front side) with respect to the lower end portion of the extension portion 47a. A portion 47b and an elastic portion 47c provided inside the extension portion 47a on the folded portion 47b are provided. The extension portion 47a and the folded portion 47b can be formed by performing bending processing (for example, hemming bending) on one metal plate. In the present embodiment, the inner surface of the folded portion 47b constitutes a contact surface 47e that contacts the cooling plate 21 in a direction parallel to the upper surface 21a of the cooling plate 21. The contact surface 47e is orthogonal to the contact surface 33d. Specifically, the contact surface 47e contacts the rear side surface (side end surface) 21e of the cooling plate 21 from the rear side. By this contact, the storage battery cover 23 is positioned in the front-rear direction with respect to the cooling plate 21. Specifically, the insertion hole (not shown) for the bolt B1 formed in each of the flanges 32a and 32b and the internal thread portion (not shown) formed in the cooling plate 21 can be positioned in the front-rear direction. it can. Therefore, the insertion hole and the female screw portion can be positioned in the front-rear and left-right directions by the positioning portion 33 and the positioning portion 47.

  In the present embodiment, the extending portion 47a and the folded portion 47b are formed with an insertion hole 47d for inserting the bolt B2 from behind. Thereby, the positioning part 47 can be used also as an attachment part. Specifically, the front end portion of the bolt B2 is screwed into a female screw portion (not shown) formed on the rear side surface 21e of the cooling plate 21. The insertion hole 47d and the female screw portion are positioned in the front-rear direction by the positioning portion 33.

  The elastic part 47c suppresses the passage of foreign matter (water, dust, etc.) between the extension part 47a and the rear side surface 21e of the cooling plate 21. Specifically, the elastic portion 47c is sandwiched between the extension portion 47a and the rear side surface 21e of the cooling plate 21 while being elastically deformed.

  In the embodiment, two contact surfaces 33d and 47e that are orthogonal to each other are provided. Thereby, the position of the storage battery cover on the upper surface of the support member can be adjusted two-dimensionally (two directions) by bringing each contact surface into contact with the support member.

  In the above embodiment, the example in which the contact surfaces 33d and 47e are provided on the two positioning portions 33 and 47, respectively, has been described, but the present invention is not limited to this. For example, two contact surfaces orthogonal to each other may be provided on one positioning portion.

(Third embodiment)
Hereinafter, the power storage device 20 according to the third embodiment will be described with reference to FIG. 9. In addition, the same code | symbol is attached | subjected about the structure similar to each said embodiment, and the description is abbreviate | omitted.

  In the power storage device 20 according to the third embodiment, the storage battery cover 23 has a positioning portion 48 instead of the positioning portion 33, and a slit (concave portion) 21 f is formed on the upper surface 21 a of the cooling plate 21.

  The positioning portion 48 includes an extension portion 48a that extends downward from the lower end portion of the left side wall 37 of the storage battery cover 23, and an elastic portion 48b that is provided on the inner side (right side) of the extension portion 48a.

  The slit 21f is a groove that opens upward and extends in the front-rear direction. The slit 21f has a width dimension in the left-right direction in which the extension portion 48a and the elastic portion 48b can be inserted. Specifically, the width dimension of the slit 21f is set such that the positioning part 48 can be inserted in a state where the elastic part 48b is elastically deformed between the extension part 48a and the inner surface of the slit 21f. Thereby, it can suppress that a foreign material passes between the extension part 48a and the inner surface of the slit 21f by inserting the positioning part 48 in the slit 21f.

  In the present embodiment, the outer side surface (left side surface) of the extension portion 48 a constitutes a contact surface 48 c that contacts the cooling plate 21 in a direction parallel to the upper surface 21 a of the cooling plate 21. Specifically, the contact surface 48c comes into contact with the inner side surface facing the right side of the slit 21f from the right side. By this contact, the storage battery cover 23 is positioned in the left-right direction with respect to the cooling plate 21.

  Further, in the present embodiment, unlike the above-described embodiments, the bending process can be omitted by omitting the folded portions 33b and 47b.

  In the second and third embodiments, the positioning portions are provided on the left side and the rear side of the storage battery cover 23. However, the present invention is not limited to these. The positioning part can be provided in any of the front, rear, left and right directions. In this case, the positioning portion can also be used as the attachment portion.

  In the embodiment, the positioning portion 48 is constituted by a portion extending downward from the outer wall 30 so as to be inserted into the slit 21f of the cooling plate 21 from above. Therefore, the storage battery cover 23 can be positioned on the cooling plate 21 by inserting the positioning portion 48 into the slit 21f. In the embodiment, the attachment portion 32 is set by setting the range from the slit 21 f to the side edge (left edge) of the cooling plate 21 to be smaller than the range in which the attachment portion 32 extends from the outer wall 30 of the storage battery cover 23. Compared with the case where is provided over the entire circumference of the outer wall 30, the cooling plate 21 can be made smaller.

(Fourth embodiment)
Hereinafter, the power storage device 20 according to the fourth embodiment will be described with reference to FIG. 10. In addition, the same code | symbol is attached | subjected about the structure similar to each said embodiment, and the description is abbreviate | omitted.

  In the power storage device 20 according to the fourth embodiment, the storage battery 22 includes a terminal 22c instead of the terminal 22b, and a bus bar 45 is provided instead of the bus bar 24.

  The terminal 22c is provided on the upper surface of the battery body 22a.

  The bus bar 24 includes a terminal connection portion 45a connected to the upper surface of the terminal 22c, a raised portion 45b extending upward from the left end portion of the terminal connection portion 45a, and an attachment portion 45c provided at the upper end of the raised portion 45b. Yes. The attachment portion 45c can attach the proximal end portion of the power line 25 at a height position higher than the storage battery 22 and equivalent to the through hole 41a. Specifically, the height position of the attachment portion 45c is adjusted by the length of the raised portion 45b.

  Also in the fourth embodiment, since the attachment portion 45c can attach the electric wire at the same height position as the through hole 41a, the horizontal portion 25a of the power line 25 is substantially changed in the range from the attachment portion 45c to the through hole 41a. Can be arranged horizontally.

  In addition, although 1st and 4th embodiment demonstrated the example in which the terminal was provided in the upper surface or left side surface of the battery main body 22a, it is not limited to this. Regardless of the position of the terminal with respect to the battery body 22a, the electric wires (power line 25 and external control line 27) connected to the terminal are led out from the inside of the storage battery cover 23 through the through holes 40a and 41a of the inner wall 31. That's fine.

  In each of the above embodiments, the hybrid excavator 1 is described as a construction machine having the power storage device 20, but the construction machine provided with the power storage device 20 is not limited thereto. For example, the power storage device 20 may be employed for an electric construction machine that is driven by electric power of a storage battery without having an engine.

1 Hybrid excavator (construction machine)
4 Work attachments 11 Upper frame (base frame)
12A Right vertical plate 12B Left vertical plate 20 Power storage device 21 Cooling plate (supporting member)
21a Upper surface 21c Left side surface (side end surface)
21e Rear side (side edge)
21f Slit (recess)
22 Storage battery 23 Storage battery cover 30 Outer side wall 32 Attachment part 33, 47, 48 Positioning part 33a, 47a, 48a Extension part (clamping part)
33c, 47c, 48b Elastic part 33d, 47e, 48c Contact surface 46 Exterior panel (covering member)
46c Inclined plate (inclined part)

Claims (6)

A power storage device provided in a construction machine,
A storage battery,
A support member having an upper surface for supporting the storage battery from below;
A storage battery cover capable of covering the storage battery supported on the support member from above and from the side by being attached to an attachment position set on the support member;
The storage battery cover has an outer wall that covers the storage battery from the side in a state of being attached to the attachment position, and extends outward from the outer wall along the upper surface of the support member, and at the attachment position, the upper surface of the support member. An attachment portion that is attached to the support member in contact with the at least one positioning member, and at least one positioning portion that positions the storage battery cover at the attachment position.
The mounting portion is provided only in a part of the range around the axis orthogonal to the upper surface of the support member, and the positioning portion is provided in a range other than the range where the mounting portion is provided around the axis. And a power storage device having a contact surface in contact with the support member in a direction parallel to the upper surface of the support member. The positioning portion is configured by a portion extending downward from the outer wall,
The power storage device according to claim 1, wherein the contact surface is in contact with a side end surface of the support member at the attachment position. The support member is formed with a recess opening upward,
The positioning portion is constituted by a portion extending downward from the outer wall so as to be insertable into the concave portion from above.
The power storage device according to claim 1, wherein the contact surface is in contact with an inner surface of the recess.   The positioning part further includes an elastic part, and a clamping part that clamps the elastic part with the support member so that the elastic part elastically deforms when the contact surface comes into contact with the support member. The power storage device according to any one of claims 1 to 3. The storage battery cover has two positioning portions,
The power storage device according to claim 1, wherein contact surfaces of the positioning portions are orthogonal to each other. A base frame,
A first vertical plate and a second vertical plate which are erected on the base frame at positions away from both left and right ends of the base frame so as to face each other in the left-right direction and extend in the front-rear direction;
A work attachment supported by the vertical plates between the vertical plates so as to be raised and lowered;
The power storage device according to claim 2, provided on the base frame at a position opposite to the second vertical plate with respect to the first vertical plate.
A covering member that covers the power storage device from a side opposite to the first vertical plate;
The covering member has an inclined portion that is inclined so as to approach the first vertical plate as it goes upward from a viewpoint viewed from the front, and the power storage device includes the positioning portion that faces the first vertical plate. A construction machine, wherein the attachment portion is disposed so as to face the inclined portion.

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