Electric construction machine

Abstract

An electric construction machine comprises a base plate (11); a battery unit (40) provided on the base plate (11) and comprising a battery container (41), several batteries (43) and a battery fan (46); a charging port (38) and an outer cover (100) covering the battery unit (40) and the charging port (38) on the base plate (11), the outer cover (100) having an opening / closing area (111) capable of being opened and closed to a closed position in which the charging port (38) is blocked to the outside and an open position in which the charging port (38) is accessible to the outside.

Description

Technical field

[0001] The present invention relates to an electric construction machine or an electric construction machine.

[0002] Priority is claimed from the Japanese patent application No. 2018-176016, which was filed on September 20, 2018, and the contents of which are hereby included by reference. State of the art

[0003] Patent specification 1 discloses an electric hydraulic excavator as an example of an electric construction machine. The electric hydraulic excavator includes an electric motor powered by a battery instead of the combustion engine of a conventional hydraulic excavator.

[0004] A battery unit containing multiple batteries is located in the rear section of the upper swing body of the electric hydraulic excavator. The battery unit is covered by an external cover. List of citations from patent literature

[0005] [Patent Specification 1] Unexamined Japanese patent application, first publication no. 2012-1933 Overview of the invention Technical problem

[0006] When a battery unit is charged, current flows into the battery, generating heat. Therefore, cooling the battery is necessary. However, the battery unit is a high-voltage device, and thus it is not desirable for it to be accidentally touched.

[0007] The present invention was conceived in view of the circumstances described above, and it is an object of this invention to provide an electric construction machine that is able to cool a battery appropriately during charging and to improve its safety. Solution to the problem

[0008] According to a first aspect of the present invention, an electric construction machine is provided, comprising: a base plate extending in a horizontal direction; a battery unit provided on the base plate and a battery container comprising a receiving space formed therein.The storage compartment comprises several batteries housed within the storage compartment and a battery fan designed to create an airflow through the storage compartment such that the air flows through the battery container; a charging port provided in a space on the discharge side of the air volume in the battery unit and capable of charging the batteries from the outside; and an external cover covering the battery unit and the charging port on the base plate, the external cover having an opening / closing area capable of being opened and closed to provide a closed position in which the charging port is blocked from the outside and an open position in which the charging port is accessible from the outside. Advantageous effects of the invention

[0009] According to the electric construction machine, this aspect makes it possible to cool the battery appropriately during charging and improve safety. List of characters Fig. Figure 1 is a side view of an electric hydraulic excavator according to an embodiment of the present invention. Fig. Figure 2 is a schematic top view showing an internal structure of an upper pivoting body of the electric hydraulic excavator according to the embodiment of the present invention. Fig. Figure 3 is a schematic side view from the left, showing the internal structure of the upper swivel body of the electric hydraulic excavator according to the embodiment of the present invention. Fig. Figure 4 is a schematic side view from the right, showing the internal structure of the upper pivoting body of the electric hydraulic excavator according to the embodiment of the present invention. Fig. Figure 5 is a longitudinal sectional view in the rear area of ​​the electric hydraulic excavator according to the embodiment of the present invention. Fig. Figure 6 is a cross-sectional view of a battery unit of the electric hydraulic excavator according to the embodiment of the present invention. Fig. Figure 7 is a horizontal sectional view of the battery unit of the electric hydraulic excavator according to the embodiment of the present invention. Fig. Figure 8 is a perspective view of a battery housing in the battery unit of the electric hydraulic excavator according to the embodiment of the present invention. Description of embodiments

[0010] In the following, an embodiment of the present invention will be described in detail with reference to the Fig. 1 to Fig. 8 described. <Elektrischer hydraulischer Bagger bzw. elektrische hydraulische Aushubmaschine (Elektrobaumaschine)>

[0011] As in Fig. Figure 1 shows an electric hydraulic excavator. 200 , which is an example of an electric construction machine, a lower chassis 210 and an upper swivel body 220 Furthermore, a direction in which gravity acts in a state in which the electric hydraulic excavator 200 It is arranged on a horizontal plane and is referred to as the upward-downward direction. <Unteres Fahrwerk>

[0012] The lower chassis 210 It has two crawler tracks or caterpillar tracks. 211 The crawler tracks 211 are driven by a hydraulic drive motor (not shown), and thus the lower chassis is 210 Set in motion. One direction of travel of the lower landing gear. 210is referred to as a forward-backward direction, a front (an essentially forward direction of movement) and a side on which a dozer blade is located. 212 (which is described below, is provided for) in the direction of travel is referred to as forward, and a rear side in the direction of travel, which is the opposite side to the front, is referred to as rear. Furthermore, a right side, when viewed in the direction of forward movement, is referred to as "right," and a left side, when viewed in the direction of forward movement, is referred to as "left." Accordingly, the pair of right and left crawler tracks is 211 planned.

[0013] A front part of the lower landing gear 210 includes the dozer blade 212, which serves as a leveling device, which is positioned in a vehicle width direction (hereinafter simply referred to as a width direction) of the lower undercarriage 210 extends. The bulldozer blade 212 It is driven by a hydraulic cylinder, thus allowing the dozer blade to be positioned at a specific height. 212 be adjusted. <Oberer Schwenkkörper>

[0014] The upper swivel body 220 is on the lower landing gear 210 provided. The upper swivel body 220 is over a swivel circle 215 with the lower chassis 210 connected. The swivel circle 215 It has a ring-shaped form centered on a pivot axis extending in the upward-downward direction. The pivot circle 215 makes it possible for the upper pivoting body 220 regarding the lower suspension 210 is pivoted around the pivot axis.

[0015] The upper swivel body 220 includes a work setup 221 , a business premises 80 , a swivel frame 10 , a portal frame 20 , a battery unit 40 , a forward-backward partition 48 , an inverter 36 , a power supply unit 37 , a charging port 38 , an electric motor 39 , a hydraulic pump 51 , a hydraulic valve 52 , an operating mode switching unit 53 , a swivel motor 70 , a cooling unit 61 , an additional battery 64 , a protector 95 and an outer cover 100 . <bearbeitungseinrichtung>

[0016] As in Fig. As shown in 1, the processing equipment 221 a boom 222 , an arm 223 and a shovel 224 In the processing facility 221 will the boom 222 , the arm 223 and the shovel 224 Each is driven by a hydraulic cylinder in such a way that various operations are carried out, such as an excavation operation. Furthermore, the lateral direction of the upper swivel body is determined. 220 in a state in which the processing equipment 221 of the electric hydraulic excavator 200 A direction pointing forward is simply referred to as a "latitude direction". Furthermore, a direction pointing towards the center in the latitude direction is referred to as "latitudeally inward", and a direction oriented to the right (one side in the latitude direction) or to the left (the other side in the latitude direction), starting from the center in the latitude direction, is referred to as "latitudeally outward". <betriebsraum>

[0017] The operating room 80 is a section in which an operator drives, and the electric hydraulic excavator 200 is operated by the operator. As in Fig. As shown in 1, this is the operating room 80 provided in an area located on the front part of the upper pivoting body 220 is arranged close to the left side above the upper pivoting body 220 lies.

[0018] The operating room 80 includes a base plate 81 , which forms a floor area, and a driver's seat 84 , which is above the base plate 81 in a rear area of ​​the base plate 81 is provided. Furthermore, a console container or console box, in which a control unit or the like is contained, various levers and a pedal are located in the operating room. 80 planned. An area above the operating room 80 is from the cover 90 covered. A rear section of the cover. 90 is at one upper end of the portal frame 20 attached. <schwenkrahmen>

[0019] As in Fig. 2 to Fig. As shown in section 4, the swivel frame contains 10 a base plate 11 , a side dividing plate 12 , a front longitudinal dividing plate 13 , a front reinforcement plate 14 , a retaining clip or bracket 15 , and a rear longitudinal partition plate 16 , which serves as a spacer. <grundplatte>

[0020] As in Fig. 2 to Fig. As shown in 4, the base plate 11 A plate-shaped component that extends in a horizontal direction. That is, the base plate. 11 It extends in the forward-backward direction and in the width direction. A lower surface of the base plate 11 is at the swivel circle 215 attached. In this way, the swivel frame is secured. 10 through the swivel circle 215 held from below. <Seitliche Unterteilungsplatte>

[0021] The side dividing plate 12 is a plate-shaped component that consists of the upper surface of the base plate 11 protrudes upwards and extends in the width direction. The side dividing plate 12 It extends, as its longitudinal direction, in the width direction. The lateral dividing plate 12 is on a front side starting from a center point of the base plate 11 Arranged in the forward-backward direction. The side dividing plate 12 extends over both end areas of the base plate 11 in the lateral direction, that is, across the right end area and the left end area. <Vordere Längsunterteilungsplatte>

[0022] The front longitudinal dividing plate 13 is a plate-shaped component that consists of the upper surface of the base plate 11 protrudes and extends in the forward-backward direction. Two front longitudinal dividing plates. 13 are as a pair in front of the side dividing plate 12 on the upper surface of the base plate 11 provided for, with them separated from each other in the width direction. That is to say, the two front longitudinal dividing plates 13 are positioned with a gap to the right and left. The two front longitudinal dividing plates 13 are directed inwards in the lateral direction from both end areas of the base plate 11 arranged along the latitude direction.

[0023] The front longitudinal dividing plate 13 is connected to a surface whose rear area forms a front side of the lateral dividing plate 12 is facing that direction. That is, the front longitudinal dividing plate. 13 is designed so that it separates from the side dividing plate 12 extends forwards. As in Fig. Shown in section 2 are the two front longitudinal dividing plates. 13 designed so that they lie close together in front of the rear end area, which is a point that is connected to the side dividing plate 12 is connected. <Vordere Verstärkungsplatte>

[0024] In the front areas of the two front longitudinal dividing plates 13 is the front reinforcement plate 14 with the two front longitudinal dividing plates 13 integrally attached. <halterung>

[0025] The bracket 15 is at the front ends of the two front longitudinal dividing plates 13 and the front reinforcement plate 14 attached. The processing equipment 221 is removed from the base plate 11 using the bracket 15 held. <Hintere Längsunterteilungsplatte>

[0026] The rear longitudinal dividing plate 16 is a plate-shaped component that consists of the upper surface of the base plate 11 It protrudes and extends in a forward-backward direction. There are two rear longitudinal dividing plates. 16 behind the side partition plate 12 on the upper surface of the base plate 11 provided, spaced apart from each other in the lateral direction. That is, it is the pair of right and left rear longitudinal dividing plates. 16 A gap is provided between the two rear longitudinal dividing plates. 16 in the lateral direction is greater than the distance between the front longitudinal dividing plates 13 at the rear ends of the two front longitudinal dividing plates 13 in the latitude direction. <portalrahmen>

[0027] As in Fig. 2 to Fig. As shown in 4, the portal frame 20 on the base plate 11 attached.

[0028] The portal frame 20 contains a pair of column areas 21 and a carrier area 22 .

[0029] The two column areas 21 are provided in an area that lies behind the side dividing plate 12 on the base plate 11 The column sections are arranged while being spaced apart from each other in the lateral direction. 21 extend in the upward-downward direction, and lower ends of the column areas 21 are attached to the base plate 11 attached.

[0030] The carrier area 22 extends in the lateral direction over the upper ends of the two column sections 21 The carrier area 22 is above the upper surface of the base plate 11 It is provided for and has a distance to it. The two column areas 21 and the carrier area 22 are attached to each other. The portal frame 20 It is formed in the shape of an inverted U when viewed in the forward-backward direction. <batterieeinheit>

[0031] The battery unit 40 is a power source for the electric hydraulic excavator 200 As in Fig. 2 to Fig. As shown in 7, the battery unit 40 near the center of a rear area on the base plate 11 provided. In the present embodiment, the battery unit contains 40 a battery container or battery box 41 , a battery 43 , a sensor container or sensor box 44 , a first lid area 45a , a second lid area 45b and a battery-powered fan 46 . <Batteriebehälter>

[0032] As in Fig. As shown in section 5, the battery container houses 41 several of the batteries 43 The battery container 41 is by arranging several battery cases in a row 42 formed in the upward-downward direction. As in Fig. 6 to Fig. Shown in section 8, each battery case contains 42 a frame body 42a , longitudinal partitions 42b and mounting plates 42c .

[0033] The frame body 42a is a component with a frame shape in top view and is rectangular in form, the sides of which are congruent in the front-back and width directions. The frame body 42a It is constructed by connecting four plates that extend along the respective sides of the rectangular shape and in the upward-downward direction.

[0034] It is a pair of longitudinal partitions. 42b provided for, which are located in the forward-backward direction inside the frame body 42a extend the two longitudinal partition walls 42b are arranged at a distance from each other in the lateral direction. Front ends of the rear ends of the two longitudinal partitions 42b are together on the frame body 42a attached. A space inside the frame body. 42a is divided into two rooms, that is, a left room S1 and a right-hand room S2 , in the width direction through the two longitudinal partition walls 42b subdivided.

[0035] The mounting plates 42c are located on both sides in the width direction and at one lower end of the left space. S1 and the right space S2 provided for. Each mounting plate 42c extends over a front end and a rear end of the frame body 42a These are holes that fit each mounting plate. 42c vertically traversed in the holding plate 42c trained.

[0036] There are two mounting plates. 42c as a couple in the left room S1 provided in such a way that they extend from a lower end of the plate, which forms the left side of the frame body 42a forms, and a lower end of the left longitudinal partition 42b into the interior of the left room S1 extend. The left space S1 its lower side extends over an area between the two mounting plates 42c in connection.

[0037] There are two mounting plates. 42c as a couple in the right room S2 so designed that they originate from a lower end of the plate, which forms the right side of the frame body 42a forms, and a lower end of the right longitudinal partition 42b into the interior of the right-hand room S2 stand out. The right space S2 its lower side extends over an area between the two mounting plates 42c in connection.

[0038] The battery container 41 is achieved by vertically arranging four battery casings 42 formed. A pair of side faces and a pair of rear faces of each of the four battery housings. 42 are flush with each other, and thus the two side surfaces are 41a and two back surfaces 41b of the battery container 41 educated.

[0039] As in Fig. Shown in section 5 are the front surfaces of three battery housings. 42 , with the exception of the top battery housing 42 , flush with each other, thus creating a first front surface 41c of the battery container 41 formed. A dimension of the uppermost battery casing 42 the multiple battery housings 42 In the forward-backward direction, it is smaller than the dimensions of other battery housings. 42 in the forward-backward direction. Therefore, the front surface of the uppermost battery casing 42 arranged so that they face the front surfaces of three battery housings 42 is reset. The front surface of the uppermost battery housing. 42 becomes a second front surface 41d of the battery container 41 The top battery compartment 42 is not located on a front area of ​​the second battery housing 42 Stacked from the top.

[0040] As in Fig. As shown in 6, the left rooms are S1 the respective battery housings 42 They are connected to each other, thus creating a left storage space. R1 in the battery container 41 formed. The right-hand rooms S2 the respective battery housings 42 are connected to each other, so that a right storage space R2 in the battery container 41 A storage space is created. R in the battery container 41 through the left storage compartment R1 and the right storage space R2 educated.

[0041] As in Fig. Shown in 2 is the battery container 41 above the pair of right and left rear longitudinal dividing plates 16 arranged in the forward-backward direction. The two side surfaces 41a of the battery container 41 are accordingly along the right and left rear longitudinal dividing plate 16 arranged. Due to the rear longitudinal dividing plates 16 is the battery container 41 above the base plate 11 at a distance from the base plate 11 arranged. Consequently, a lower space is created. L formed in such a way that it covers the entire area of ​​a bottom section of the battery container 41 between the battery container 41 and the base plate 11 extends to the lower end of the storage space. R is connected to the lower room L connected across the entire area. <batterie>

[0042] There are several batteries 43 in the storage space R inside the battery compartment 41 accommodated. As in Fig. 5 to Fig. As shown in section 7, the batteries form 43 A box shape that extends in the forward-backward, upward-downward, and lateral directions. As in Fig. As shown in section 7, the batteries are... 43 in the forward-backward direction, each time in the right-hand space S2 and the left room S1 each battery casing 42 arranged in a row. As in Fig. Shown in section 6 are the areas of a lower surface of each battery. 43 in the lateral direction, each through the retaining plate 42c held from below. That means each battery 43 is arranged so that they extend over the two mounting plates 42c extends.

[0043] As in Fig. 5 and Fig. As shown in section 7, the batteries are... 43 , which are arranged adjacent to each other in the forward-backward direction, are arranged with a gap in the forward-backward direction. Consequently, there is a gap between the batteries. 43 a gap was formed.

[0044] As in Fig. As shown in section 5, the respective batteries are stacked vertically. 43 the battery housing 42 They are arranged in the same position in the forward and backward directions. Therefore, there are multiple airflow channels. F , which are located above an upper end and a lower end of the storage space R extend in the upward-downward direction, in the storage space R through the gaps between the batteries 43 educated.

[0045] The batteries 43 , which are in the left storage compartment R1 The batteries are arranged in series. 43 , which are in the right storage compartment R2 The components are arranged in series. Therefore, in the present embodiment, the battery circuits of the battery unit are... 40 two right and left parallel circles. <Sensorbehälter>

[0046] The sensor container 44 is designed to be located on a rear surface of each battery housing 42 protrudes to the rear. The sensor container 44 It is designed in a box shape that extends in the width direction. Various sensors and contact elements, or similar components, are located inside the sensor housing. 44 housed a service plug 44a is in the top sensor container 44 designed in such a way that, starting from the sensor container 44 protrudes to the rear. The battery circuit of the battery unit 40 is done by pulling out the service plug 44a interrupted.

[0047] Through the battery casing 42 , the batteries 43 , which are in the battery casing 42 are housed, and the sensor container 44 , which is in the battery casing 42 As planned, a battery module is formed. The battery unit 40 is formed by connecting several stages of battery modules. <deckelbereich>

[0048] The first lid area 45a and the second lid area 45b close the storage space R in the battery container 41 From above. The first lid area 45a closes off a front area 42d (see Fig. 2 and Fig. 3) of the second battery housing 42 from above. The second lid area 45b seals the top battery compartment 42 from above. It is a pair of bore areas H (see Fig. 5) with intervals in the width direction in each of the first cover areas 45a and the second lid area 45b trained. <Batterielüfter>

[0049] As in Fig. Shown in section 2 is a battery-powered fan. 46 each in the first lid area 45a and in the second lid area 45b provided. The battery fans 46 protrude from the upper surfaces of the first lid area. 45a and the second lid area 45b The battery fan 46 creates an airflow into the storage space. R such that the air flows from below through the storage space R in the battery container 41 upwards. For example, the battery fan 46 a Sirocco fan and includes a fan body 46a and a fan cover 46b .

[0050] As in Fig. 5 and Fig. As shown in 6, the fan body is 46a a fan that is set in rotation about an axis extending in the upward-downward direction, and it is located in the bore area of ​​the first cover area. 45a and the second lid area 45b intended. The fan body 46a It is set into rotation, and thus air flows from bottom to top.

[0051] The fan cover 46b is a component that forms the fan body 46a from above, and it directs a flow of air that the fan body 46a The air, which has passed through and flows upwards, is directed horizontally and carried away. In the present embodiment, the fan cover... 46b the battery fan 46 , which is located in the first lid area 45a The air is designed to flow outwards in a lateral direction. The fan cover 46b the battery fan 46 , which is located in the second lid area 45b As intended, the air is released to the rear.

[0052] As in Fig. Figure 5 shows an air inlet bore 11a in the base plate. 11 formed, and the air inlet bore11a penetrates the base plate 11 in a vertical direction and causes the lower space L and a space below the base plate 11 are connected to each other.

[0053] In the lower room L is a cover 11b provided, which covers the air inlet bore 11a in an upward direction and forward from a rear side of the air inlet bore 11a. The air inlet bore 11a is connected to the lower space L by means of an opening area of ​​a front area of ​​the cover 11b In connection. In the cover 11b are several inclined plates 11c , which prevent water from penetrating from below, are provided with gaps in the forward-backward direction. Each of the inclined plates 11c extends in such a way that, starting from the back and moving towards the top, they are inclined backwards. <Vorwärts-Rückwärts-Trennwand>

[0054] As in Fig. Figure 5 shows the forward-backward partition. 48 in front of the battery unit 40 provided, and a space in which the battery unit 40 is housed, and the operating room 80 in front of the battery unit 40 are in the forward-backward direction through the forward-backward partition 48 divided. A driver's seat partition includes an upper wall area. 48a , a horizontal wall area 48b and a lower wall area 48c .

[0055] The upper wall area 48a extends in the upward-downward direction, with the second front surface 41d of the battery container 41 is turned towards.

[0056] The horizontal wall area 48b extends from a lower end of the upper wall area 48a forwards, where it reaches the first lid area 45a is facing the battery fan 46 is between the horizontal wall area 48b and the first lid area 45a arranged.

[0057] The lower wall area 48c extends from a front end of the horizontal wall area 48b downwards, where it forms the first front surface 41c of the battery container 41 is turned towards. <umrichter>

[0058] As in Fig. 2 to Fig. As shown in section 4, this is a converter. 36 on the second lid area 45b the battery unit 40 by means of a carrier 36a designed with a frame shape. The inverter 36 converts the power from the battery unit 40 The provided DC power is converted into AC power. <Leistungszuführeinheit>

[0059] As in Fig. 2 and Fig. As shown in section 4, the power supply unit is... 37 on a right side of the battery unit 40 provided. A front surface of the power supply unit 37 is at a distance from the rear of the right column area 21 of the portal frame 20 arranged A lower end of the power supply unit 37 is on the base plate 11 attached.

[0060] The power supply unit 37 supplied by the battery unit 40 stored DC power to the inverter 36 That is, the DC power from the battery unit 40 will be sent to the inverter 36 via the power supply unit 37 The power supply unit contains various electrical components, such as a contact component, a DC-DC converter, or an in-vehicle charger. 37 planned. <ladeanschluss>

[0061] As in Fig. 2 to Fig. As shown in 5, the charging port is 38 in an area above the battery unit 40 provided for, which is directed towards a downstream side (an outlet side for air) in a direction of airflow in the battery container 41 will be. Similar to the inverter. 36 is the charging port 38 on the carrier 36a attached to a second upper surface 31c the battery unit 40 is attached. The charging port 38 is directly above the sensor container 44 arranged. The charging port 38 includes a standard charging port 38a and a fast charging port 38b .

[0062] A standard charging connector plug is used with the normal charging port. 38a Connected externally. Electrical power from the standard charging plug is supplied to the battery unit. 40 via a normal charger and a contact component of the power supply unit 37 supplied. A fast charging plug is connected to the fast charging port. 38b Connected externally. Electrical power from the fast-charging plug is supplied to the battery. 40 via the contact component of the power supply unit 37 supplied. The battery unit 40 , the inverter 36 and the charging port 38 are through the electric feed unit 37 electrically connected.

[0063] A charging plug with the charging port will be used. 38 connected, and thus the fan body is 46a the battery fan 46 targeted. <elektromotor>

[0064] An electric motor 39 is determined by the AC power supplied by the inverter 36 is delivered, targeted.

[0065] As in Fig. 2 and Fig. As shown in section 3, this is the electric motor. 39 on a left side of the battery unit 40 provided. A drive shaft of the electric motor. 39 is arranged along the forward-backward direction. <hydraulikpumpe>

[0066] The hydraulic pump 51 is achieved by rotating the drive shaft of the electric motor 39 powered, thereby dispensing hydraulic oil. As in Fig. Shown in section 2 is the hydraulic pump. 51 near a forward-backward position of the lateral dividing plate 12 in front of the electric motor 39 on the base plate 11 planned. The hydraulic pump 51 is arranged so that its axis of rotation extends in the forward-backward direction.

[0067] As in Fig. 3 shows the hydraulic pump 51 held by a holding area (not shown) and thus it is positioned at a distance above the base plate. 11 arranged. One axis of the hydraulic pump's rotary shaft 51 extends in the forward-backward direction in such a way that it aligns with a rotational axis of the drive shaft of the electric motor. 39 agrees. The rotary shaft of the hydraulic pump 51 is connected to the drive shaft of the electric motor 39 tied together. <hydraulikventil>

[0068] As in Fig. Shown in 2 is the hydraulic valve 52 in front of the side dividing plate 12 on a left side of the front longitudinal dividing plate 13 on the base plate 11 provided. The hydraulic valve 52 is with the hydraulic pump 51 connected. The hydraulic valve 52 The hydraulic oil is distributed, which comes from the hydraulic pump. 51 The output is supplied to hydraulic equipment, such as various hydraulic cylinders. <betriebsmodus-schalteinheit>

[0069] The operating mode switching unit 53 is with the hydraulic valve 52 connected, whereby the setting of the operating mode switching unit 53 is changed by maintenance personnel, and thus a distribution target of the hydraulic oil through the hydraulic valve is established. 52 The hydraulic cylinder, which is set in motion by various lever operations performed by the operator, is changed. Consequently, the operating modes of various lever operations can be switched by the operator.

[0070] As in Fig. Figure 2 shows the operating mode switching unit. 53 on the left side (the outside in the width direction) of the hydraulic valve 52 arranged when viewed from above. <schwenkmotor>

[0071] The swivel motor 70 is a hydraulically driven motor that is set in motion by the hydraulic oil supplied by a hydraulic valve 52 is supplied. The swivel motor 70 is designed so that it forms the base plate 11 at a point between the front longitudinal dividing plates 13 on the base plate 11 penetrates. An axis of a rotary shaft of the swivel motor. 70 This corresponds to the up-down direction. The swivel motor 70 It is driven by hydraulic pressure, thus providing a driving force for the swivel motor. 70 via a swivel gear (not shown) onto the swivel circle 215 transferred. Consequently, the upper pivoting body is 220 so driven that it is pivoted or rotated in relation to the lower landing gear. <Kühleinheit>

[0072] As in Fig. As shown in 2, the cooling unit is shown. 61 in an area in front of the lateral dividing plate 12 and is located on the right side of the right front longitudinal partition plate. The cooling unit 61 It has a cooling fan. 62 , which is set in rotation, and a heat exchanger unit 63 , which includes a radiator and an oil cooler. <Zusatzbatterie 64>

[0073] As in Fig. As shown in 2, the auxiliary battery is 64 under the cooling unit 61 on the base plate 11 provided. For example, the auxiliary battery supplies 64 electrical power to an auxiliary device, such as lighting or various control systems. The auxiliary battery 64 is supplied via a DC-DC converter of the power supply unit 37 loaded.

[0074] As in Fig. Shown in section 2 is an oil tank. 65 in front of the cooling unit 61 arranged.

[0075] The hydraulic oil that is to be supplied to the hydraulic motor is stored in the oil tank. 65 stored. <protektor>

[0076] As in Fig. As shown in Figure 1, there are two protectors. 95 as a pair at both lower corner areas of a rear area of ​​the upper swivel body 220 designed with spacing in the lateral direction. For example, each protector 95 Made from a high-strength element, such as steel. The protectors 95 are together at both corner areas of a rear end of the base plate 11 They are attached and extend upwards. If a collision occurs in a rear area of ​​the upper pivoting body 220 occurs when the upper pivot body 220 When it is rotated, the protectors provide protection. 95 the upper swivel body 220 before the collision. <Außenabdeckung>

[0077] As in Fig. Shown in 1 is the outer cover 100 a cover that forms an outer shape of the upper pivoting body 220 forms. These are various components of the upper swivel body. 220 inside the outer cover 100 housed. The outer cover 100 has a left cover 120 , a right cover 130 and a rear cover 110 .

[0078] As in Fig. 1 and Fig. As shown in 2, the left cover forms 120 a left area of ​​the outer cover 100 As in Fig. As shown in section 2, the left cover is covered. 120 the hydraulic pump 51 , the hydraulic valve 52 and the operating mode switching unit 53 from the left side.

[0079] As in Fig. 1 and Fig. As shown in 2, the right cover forms 130 a right area of ​​the outer cover 100 The right cover 130 The cooling unit covers 61 , the auxiliary battery 64 and the oil tank 65 off. The right cover 130 Includes an air inlet hole (not shown) for introducing air to the cooling unit. 61 and includes an air outlet bore (not shown) for venting air that is blocking the cooling unit 61 has gone through. <Hintere Abdeckung>

[0080] As in Fig. 1 and Fig. As shown in section 2, the rear cover forms 110 a rear area of ​​the outer cover 100 . How Fig. Shown in section 2, it covers the rear cover. 110 the battery unit 40 , the inverter 36 , the power supply unit 37 , the charging port 38 and the electric motor 39 so that the battery unit 40 , the inverter 36 , the power supply unit 37 , the loading area 38 and the electric motor 39 have been recorded accordingly.

[0081] As in Fig. As shown in section 5, the rear cover 110 an opening / closing area 111 The opening / closing area 111 is in the middle of the rear cover 110 provided in the lateral direction in an area that forms a rear and an upper end of the rear cover 110 corresponds to the opening / closing area. 111 is rotated around an axis O in the lateral direction at the upper end of the rear cover 110 Designed to be rotatable. The opening / closing area 111 is located at a point adjacent to the charging port 38 This corresponds to the view from the rear. The opening / closing area 111 It is designed to be rotatable between a closed and an open position. The closed position is a position in which the opening / closing range is... 111 extending downwards and backwards from the axis of rotation O, and the charging port 38 is from the outer edge area of ​​the rear cover 110 separated. The open position is a position in which the opening / closing area is separated. 111 rotates around the axis of rotation O starting from the closed position, and the charging port 38 is from outside the rear cover 110 accessible. The rear cover 110 is above the battery unit 40 arranged when viewed from the rear. If the opening / closing area 111 When closed, it forms an outer shape of the rear cover. 110 the entire rear area. <Wirkung beim Betrieb>

[0082] In the electric hydraulic excavator 200 , which has the previously described structure, will be when the batteries 43 the battery unit 40 be loaded as in Fig. As shown in Figure 5, the opening / closing area 111 the rear cover 110 from a closed state to an open state. Therefore, the charging port 38 on the battery unit 40 on the rear side of the rear cover 110 accessible, that is, at least an access opening M for the charging port is provided. 38 through the opened opening / closing area 111 educated.

[0083] Furthermore, a charging plug is connected to the charging port from the outside via the access opening M. 38 connected, and thus the batteries are 43 charged. When the batteries 43 They are charged in the batteries 43 Heat is generated, and hydrogen gas is also produced, which is supplied by the batteries. 43 originates, is generated. In the present embodiment, when the charging plug is connected to the charging port, 38 connected to the fan bodies 46a the battery fan 46 powered. To reliably vent the hydrogen gas, the fan bodies are driven. 46a for a predetermined period of time after the end of charging, and then the fan bodies are 46a stopped.

[0084] Therefore, water flows into the storage space. R in the battery container 41 the air through the storage space R from the bottom up, so that they expand the storage space R through. That is, when the fan housings 46a The air in the lower room will be controlled L via the air inlet hole 11a from below, which is in the base plate 11 is formed, introduced. Furthermore, the air enters the lower space. L into the respective airflow channels F one that is between the batteries 43 are formed, and it flows upwards in this way. Furthermore, the upper end of the storage space is formed. R reaching air from the battery container 41 about the fan bodies 46a the battery fan 46 The air is directed outwards. In this case, it is channeled horizontally along the first cover area. 45a and the second lid area 45b through the fan cover 46b , which the fan body 46a surrounds, derived. As further indicated by the arrow in Fig. As shown in section 5, the battery container is removed. 41 air diverted to the rear side of the rear cover 110 via the access opening above the battery compartment 41 to the charging port 38 derived as an exit connection.

[0085] As previously described, according to the electric hydraulic excavator 200 of the present embodiment the opening / closing area 111 the outer cover is opened, thus revealing the opening for the charging port. 38 as an outlet for the air that the batteries 43 It has cooled, can be used, or can serve as an outlet for the generated hydrogen gas. Therefore, heat does not accumulate inside the outer cover, and the batteries 43 can be cooled appropriately.

[0086] This involves a rear area of ​​the upper swivel body. 220 , which is from the rear cover 110 the outer cover covers an area in which a high-voltage device, such as the battery unit, is located. 40 , is arranged, and it is preferred that the area be enclosed to prevent accidental contact.

[0087] In the present embodiment, the access opening for the charging port can be 38 , which pass through the opening / closing area 111 It is formed when the outlet opening is used for air. Therefore, it is possible to use the battery unit. 40 to insulate appropriately from the outside without requiring a separate air outlet on the rear cover 110 to be provided. Furthermore, the charging port must be 38 provide only a minimal opening area required for loading.

[0088] Therefore, it is possible to improve safety with regard to high voltage, while still ensuring the batteries... 43 They should be kept adequately cool during charging.

[0089] Furthermore, in the present embodiment, each battery fan causes 46 that air passes through the battery compartment 41 flowing upwards from the bottom. In a case where the air flows in such a way that it fills the battery container 41 If the heat is transmitted in the lateral direction, the following disadvantages can occur. That is to say, an electrical device that generates heat, such as an electric motor, 39 or the power supply unit 37 , is outside the battery compartment 41 arranged in the width direction, and thus the air that has passed through the electrical device enters the battery compartment. 41 one, and therefore cooling efficiency is reduced.

[0090] In the present embodiment, the air flows through the battery container. 41 from the bottom to the top, and thus the batteries can 43 It must be cooled appropriately by air that does not come into contact with other devices. Furthermore, the charging port... 38 above the battery unit 40 arranged, and thus the opening / closing area 111 , which leads to the access opening for the charging port 38 will also be located above the battery unit 40 arranged.

[0091] Furthermore, air flows through the battery container from the bottom. 41 upwards, and the air, which carries the heat from the batteries 43 Once recorded, it can be accessed via the charging port's access opening. 38 be discharged to the outside in an unchanged manner.

[0092] Furthermore, the multiple batteries 43 in the storage space R arranged, and thus the airflow channels are located F , which are located above the top and bottom of the storage space R extend between the batteries 43 The air flows through the airflow channel. F from the bottom to the top, and therefore it is possible to remove the respective batteries. 43 to cool evenly and appropriately. Each airflow channel F It extends in a straight line, thus reducing air resistance and allowing air to flow freely without congestion.

[0093] Before the air that enters the base plate 11 designed air inlet bore 11a entering from below, into the storage space R in the battery unit 40 Upon entering, she arrives in the lower room. L In this way, it is distributed into the lower space. L Air entering in the horizontal direction along the upper surface of the base plate 11 , and thus the air can circulate across the entire lower end of the storage space. R The air is distributed evenly. Therefore, the air enters each airflow channel uniformly. F one, and thus the entire battery unit can 40 They should be cooled appropriately, whereby the heat is not primarily distributed in the horizontal direction.

[0094] Furthermore, the battery fan 46 on the lid area 45 attached, which increases the storage space R from above, and thus, for example, in comparison to a case where the battery fan 46 It is mounted in the lower area, providing a power supply or allowing maintenance of the battery fan. 46 can be accomplished in a simple form.

[0095] Furthermore, the battery fan 46 the air in the direction along the upper surface of the lid area 45 derive. Therefore, it is possible to prevent the emissions from the battery fan. 46 The extracted air collides with structural components, causing an increase in air pressure. Therefore, the air can flow freely. Furthermore, it is possible to prevent the air from the battery fan from escaping. 46 , which is located in the second lid area 45b The plan is to route the extracted air directly to the inverter. 36 is supplied above the battery fan 46 is arranged. <Andere Ausführungsformen>

[0096] The embodiment of the present invention has been described above. However, the present invention is not limited to this embodiment and can be suitably modified within the scope of protection without deviating from the technical idea of ​​the invention.

[0097] In this embodiment, the air flows in such a way that it passes through the storage space. R in the battery container 41 from the bottom to the top. However, the present invention is not limited to this. For example, the air can flow through the storage space. R flow in the latitudinal direction, or the air can fill the storage space R from the front to the back. In this case, the charging port can be accessed. 38 on a downstream side in the direction of airflow in the battery container 41 be provided for, and the opening / closing area 111 The outer cover can be designed in such a way that it is adjacent to the charging port. 38 is assigned.

[0098] Furthermore, the direction of airflow in the storage space can be determined. R in the battery container 41 the airflow channel F , which runs in the direction of flow between the batteries 43 extends, are formed.

[0099] In this embodiment, the electric hydraulic excavator 200 as an example of an electric construction machine. However, the present invention is not limited to this. For example, the present invention can be applied to an electric excavator in which the drive for the processing unit is 221 or the like, which is fully electrically powered, and can also be applied to an electric hydraulic excavator in which electrical power is supplied externally via a cable. Furthermore, the present invention can be applied to other electric construction machines. Industrial applicability

[0100] According to an electric construction machine of the present invention, it is possible to cool a battery appropriately during charging and to improve safety. Reference symbol list 10: Swivel frame 11: Base plate 11a: Air inlet hole 11b: Cover 11c: inclined plate 12: side partition plate 13: front longitudinal dividing plate 14: front reinforcement plate 15: Retaining clip or bracket 16: rear longitudinal partition plate 20: Portal frame 21: Column area 22: Carrier area 36: Inverter 36a: Carrier 37: Power supply unit 38: Charging port 39: Electric motor 40: Battery unit 41: Battery container or battery box 41a: Front surface 41b: Back surface 41c: first front surface 41d: second front surface 42: Battery casing 42a: Frame body 42b: Longitudinal partition 42c: Mounting plate 43: Batteries 44: Sensor container or sensor box 44a: Service plug 45a: first cover area 45b: second lid area 46: Battery fan 46a: Fan body 46b: Fan cover 48: Forward-backward partition 48a: upper wall area 48b: horizontal wall area 48c: lower wall area 51: Hydraulic pump 52: Hydraulic valve 53: Operating mode switching unit 61: Cooling unit 62: Cooling fan 63: Heat exchanger unit 64: Auxiliary battery 65: Oil tank 70: Swivel motor 80: Operating room 81: Base plate 84: Driver's seat 90: Cover 95: Protector 100: Outer cover 110: rear cover 111: Opening / closing area 120: left cover 130: right cover 200: electric hydraulic excavator 210: lower landing gear 211: Crawler chassis 212: Dozer blade 215: Swivel circle 220: upper swivel body 221: Processing unit 222: Boom 223: Arm 224: Shovel S1: left room S2: right space R: Storage space R1: left storage compartment R2: right storage compartment Q: Airflow duct L: lower room O: Axis of rotation QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2018176016

[0002] JP 20121933

[0005] < / protektor> < / schwenkmotor> < / hydraulikventil> < / hydraulikpumpe> < / elektromotor> < / ladeanschluss> < / umrichter> < / deckelbereich> < / batterie> < / batterieeinheit> < / portalrahmen> < / halterung> < / grundplatte> < / schwenkrahmen> < / betriebsraum> < / bearbeitungseinrichtung>

Claims

[1] An electric construction machine, with: a base plate that extends in a horizontal direction; a battery unit provided on the base plate and a battery container having a storage space formed therein, several batteries housed in the storage space, and a battery fan designed to create an airflow through the storage space such that the air passes through the battery container; a charging port which is provided and designed in a discharge-side space for air in the battery unit to charge the battery from the outside; and an outer cover that covers the battery unit and the charging port on the base plate, wherein the outer cover has an opening / closing area which is able to be opened and closed for a closed position in which the charging port is blocked from the outside, and an open position in which the charging port is accessible from the outside. [2] The electric construction machine according to claim 1. wherein the battery fan is designed to create an airflow through the storage space such that the air flows from a lower side upwards through the battery container, and the charging port is located above the battery unit. [3] The electric construction machine according to claim 2, wherein the multiple batteries are arranged in the horizontal direction and in the upward-downward direction, and wherein an airflow channel extending over an upper end and a lower end of the storage space is formed between the batteries. [4] The electric construction machine according to claim 2 or 3, which further comprises: a spacer that forms a lower space between a lower area of ​​the battery unit and an upper surface of the base plate, wherein the base plate has an air inlet bore that runs vertically through the base plate and is connected to the lower space, wherein the battery container has a frame shape that covers the storage space from an outer circumferential side of the storage space, and a lower end of the storage space is connected to the lower room. [5] The electric construction machine according to one of claims 2 to 4, wherein the battery unit further comprises a lid area designed to close the storage space from above, and the battery fan is attached to the lid area. [6] The electric construction machine according to claim 5, wherein the battery fan is designed to direct the air in the storage space in one direction along an upper surface of the lid area.