Bonnet structure of electric construction machinery

Abstract

This design prevents accidental opening of the hood, protecting high-voltage equipment such as the high-voltage battery, high-voltage inverter, and high-voltage power lines for the main drive source, which are mounted in the space under the hood, from water droplets, thereby ensuring worker safety and providing a hood that facilitates maintenance work. [Solution] High-voltage equipment 36 is installed in the space 28 under the bonnet of the electric construction machine 10. The bonnet 30 that covers the high-voltage equipment 36 from above includes a plurality of panels 31-33 that are attached and fixed by a tool, and is opened by releasing the attachment and fixing of the panels by a tool.

Description

Technical Field

[0001] The present invention relates to a bonnet of an electric construction machine.

Background Art

[0002] Conventionally, as the bonnet of a construction machine, for example, those described in JP-A-2014-095203 (Patent Document 1) and JP-A-2024-035636 (Patent Document 2) are known.

[0003] In the bonnet of Patent Document 1, an inspection window for accessing the space under the bonnet is formed. The inspection window is detachably covered with an inspection cover which is a flat rectangular plate.

[0004] The bonnet of Patent Document 2 includes a left upper surface cover, an engine hood, and a right upper surface cover. The left upper surface cover and the right upper surface cover are fixedly attached to the bonnet body so as not to be opened or closed. The engine hood is connected to the bonnet body by a hinge and can be opened and closed. Daily inspections such as checking the remaining amount of engine oil and maintenance work such as replacement are performed by opening the engine hood.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] Conventional construction machines are equipped with an internal combustion engine such as a diesel engine as the main drive source for sending hydraulic oil to the attachment. They also carry a battery and power lines for driving auxiliary equipment such as a lighting device. These are generally 12 [V].

[0007] In response to the recent demand for decarbonized energy, electrification is being introduced in construction machinery as well, with some or all of the main drive sources that drive the attachments of construction machinery being replaced from internal combustion engines to electric motors and electric actuators. Electrified construction machinery incorporates a main drive source battery with a much larger capacity than conventional construction machinery batteries, as well as a main drive source inverter and other high-voltage equipment for the main drive source, in the space under the hood. Electrified construction machinery also has low-voltage equipment that complements the high-voltage equipment. Low-voltage equipment refers to devices connected to low-voltage circuits of 12V or 24V DC (less than 100V), such as lighting fixtures, solenoid valves, wireless communication devices, control electronic circuits such as microcontrollers, and system-by-wire systems. In other words, high-voltage equipment refers to components of high-voltage circuits that are installed separately from low-voltage circuits, and includes DC and AC equipment. Specifically, for example, the rated voltage is 650V DC and 700V AC.

[0008] Since electric construction machinery is equipped with high-voltage equipment such as high-voltage batteries, high-voltage inverters, and high-voltage power lines, which fall under the high-voltage category mentioned above, it is preferable to take measures to prevent people from easily touching them, compared to conventional 12V equipment.

[0009] Nevertheless, if the inspection covers or hoods described in the aforementioned patent documents are adopted, there is a risk that workers unfamiliar with handling electrical equipment may inadvertently open them due to their easily opened structure.

[0010] Furthermore, high-voltage equipment is vulnerable to water droplets such as rain, and carelessly opening the inspection covers or hoods described in the patent document could expose the high-voltage equipment to water droplets, potentially causing deterioration or short circuits. In fact, the conventional bonnet structure described in the aforementioned patent document does not take into account water exposure to high-voltage equipment, and carelessly opening the inspection covers or hoods described in the patent document would expose the high-voltage equipment to water.

[0011] On the other hand, when electrical equipment service technicians perform maintenance work such as inspection and repair of high-voltage equipment, there is a problem in that the inspection covers and hoods described in the patent documents are too small, hindering the efficiency of the inspection and repair work. This is because high-voltage equipment can sometimes be larger than conventional engines and auxiliary equipment.

[0012] In view of the above circumstances, the present invention aims to provide a hood that prevents accidental opening of the hood, protects mounted high-voltage equipment from water droplets, ensures worker safety, and facilitates maintenance work. [Means for solving the problem]

[0013] For this purpose, the bonnet structure for construction machinery according to the present invention relates to an electric construction machine that includes an electric motor as the main drive source, and is a bonnet structure that covers high-voltage equipment for the electric motor installed in the space under the bonnet, and such bonnet includes a plurality of panels that are attached and fixed by fastening means that require a tool, and the bonnet is opened when the attachment and fixing are released by the aforementioned tool.

[0014] According to this invention, since the panel mounting and fixing cannot be released without using a tool and the hood cannot be opened, the hood is made difficult to open unintentionally, making it less likely for water droplets to come into contact with high-voltage equipment unintentionally, and reducing the risk of unintentional electric shock. Preferably, the panel, which is a component of the hood, is several times larger than the typical size of a so-called inspection window. The larger size allows the hood to open wider, making maintenance work more efficient. Preferably, each panel is fixed to the body of the construction machine with fastening means that require a tool. Fastening means that require a tool make it even more difficult for the hood to be opened unintentionally. The tool is a general-purpose tool that conforms to JIS standards and is kept in a toolbox for everyday use, such as a Phillips screwdriver, a flathead screwdriver, a box wrench, etc. Fastening means that require a tool are general fastening means such as bolts with hexagonal heads, socket head cap screws, other polygonal bolts, Phillips screws, flathead screws, etc. Alternatively, the fastening means may be of a special shape, and the tool may be a special tool that is only compatible with fastening means of a special shape. For a definition of high-voltage equipment, please refer to the explanation above.

[0015] The hood of the present invention may be formed of a plate wall having a general cover, an inner wall surface and an outer wall surface. In one aspect of the present invention, the hood is a three-dimensional shape that includes a top wall and further includes at least one of four walls: a front wall, a rear wall, a left wall, and a right wall. With this aspect, compared to the case where only the top wall of the hood is open and only the upper side of the equipment installed in the space under the hood is exposed, the equipment is more widely exposed to the front, rear, left and right sides, so maintenance work is made much easier. In another aspect, the configuration may be such that only the top wall of the hood is open.

[0016] In a preferred aspect of the present invention, the space under the hood, which is sectioned beneath the hood, includes a first section and a second section where equipment other than high-voltage equipment is installed, and a third section where high-voltage equipment is installed, and the panels that are components of the hood include a first panel covering the first section, a second panel covering the second section, and a third panel covering the third section. In this aspect, when opening the hood, it is not necessary to separate all the panels, but it is sufficient to separate the panels covering the sections where the equipment subject to maintenance work is installed.

[0017] In a more preferred aspect of the present invention, two panels are connected such that their edges overlap vertically. This aspect allows for a defined order of installation and removal of the panels. Therefore, the chances of separation of panels covering areas with infrequent maintenance or panels that should not be unintentionally separated can be reduced. In another aspect, two panels are installed so that their edges abut against each other in an expanding direction.

[0018] In one aspect of the present invention, panels covering equipment with relatively low maintenance frequency are positioned relatively lower, and panels covering equipment with relatively high maintenance frequency are positioned relatively higher, corresponding to the maintenance frequency of the equipment installed in each of the first to third sections. In this aspect, by grouping equipment according to the frequency of maintenance work and placing them in each section, the labor required for separating panels is reduced. The frequency of maintenance work is, for example, described in the instruction manual or maintenance procedure manual for construction machinery.

[0019] The structure for connecting the panels is not particularly limited, but in a more preferred aspect of the present invention, the lower edge of the panel edges is in the shape of a gutter that extends along the upper edge, and extends to the front edge, rear edge, left edge, or right edge of the hood at the same height, or gradually or in stages. With this configuration, rainwater and other water droplets that land on the hood are quickly discharged to the outside of the hood via the gutter.

[0020] The layout of the gutter is not particularly limited. However, as one aspect of the present invention, the end of the gutter-shaped edge extending to any of the front edge, rear edge, left edge, and right edge of the bonnet is arranged so as to avoid directly above the radiator intake of the construction machine. According to such an aspect, it is possible to prevent water discharged from the end of the gutter to the outside of the bonnet from being taken into the radiator intake.

Advantages of the Invention

[0021] Thus, according to the present invention, the labor of separating the panels suppresses the inadvertent opening of the bonnet, prevents the high-voltage equipment from being wetted, and prevents the operator from inadvertently contacting the high-voltage equipment. Further, by separating one or more panels, the high-voltage equipment can be exposed, and the maintenance work can proceed smoothly.

Brief Description of the Drawings

[0022] [Figure 1] It is a perspective view showing an electric construction machine according to an embodiment of the present invention. [Figure 2] It is a perspective view showing a state in which the panels of the bonnet are separated from the same embodiment. [Figure 3] It is a plan view showing the same embodiment. [Figure 4] It is a rear view showing the same embodiment. [Figure 5] It is a plan view showing the space under the bonnet of the same embodiment. [Figure 6] It is a perspective view showing the bonnet of the same embodiment. [Figure 7] It is a cross-sectional view showing the connection of two panels of the same embodiment. [Figure 8] It is a perspective view showing the fixing means of the second panel and the body of the same embodiment.

Modes for Carrying Out the Invention

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Figure 1 is a perspective view showing an electric construction machine equipped with a bonnet, which is one embodiment of the present invention. Figure 2 is a perspective view showing the electric construction machine of the same embodiment with the bonnet separated.

[0024] The electric construction machine 10 comprises a lower traveling body 11 having a pair of tracks 12, 12 on the left and right sides, and an upper slewing body 21 that is rotatably connected to the lower traveling body 11. The upper slewing body 21 is rotatable about a slewing axis X that extends vertically through the center of the lower traveling body 11 and the center of the upper slewing body 21.

[0025] The rear end of the boom 22 is connected to the center of the upper slewing body 21 via a pivot. The boom 22 extends forward and upward from the upper slewing body 21, and the front end of the boom 22 (not shown) is capable of swinging vertically. An arm (not shown) is connected to the front end of the boom 22 via a pivot. Furthermore, a bucket (not shown) is connected to the tip of the arm via a pivot. An electric construction machine 10 is, as an example, such a power shovel. Alternatively, the bucket and arm described above can be replaced with other attachments not shown. An electric construction machine 10 refers to a construction machine in which part or all of the main drive source is an electric motor such as a rotating electric machine, or other electric actuators.

[0026] A cabin 26 is provided in front of the upper rotating body 21 and on one side in the left-right width direction. In the rear region of the upper rotating body 21, a wall-like body 27 is provided that forms the outer perimeter of the upper rotating body 21 in both width directions and at the rear, and a wall-like bonnet 30 is provided that covers the body 27 from above. The body 27 is a wall erected on the outer edge of the upper frame (not shown) that constitutes the bottom surface of the upper rotating body 21. The bonnet 30 extends from one side in the width direction of the upper rotating body 21 to the other side and covers the upper edge of the body 27. The bonnet 30 covers the space under the bonnet, which is partitioned by the body 27, from above, preventing raindrops and other water droplets from entering the space under the bonnet.

[0027] Figure 2 is a perspective view showing the electric construction machine of the same embodiment with the bonnet 30 open. The space 28 directly below the bonnet 30 contains an electric drive source (not shown) for driving the tracks 12 and boom 22 of the electric construction machine 10, high-voltage equipment 36 and a battery (not shown) electrically connected to the drive source, a heat dissipation radiator 37, and other auxiliary equipment. These devices are grouped together with related equipment and appropriately installed in their respective compartments that make up the space 28 below the bonnet.

[0028] The radiator 37 is positioned adjacent to the air intake 41 that penetrates the body 27. The radiator 37 is a cooling device that takes in outside air from the air intake 41. In this embodiment, it is preferable that the air intake 41 is provided on one side in the width direction of the body 27 and positioned away from the high-voltage equipment 36. The radiator 37 is also installed on one side in the width direction of the space under the bonnet 28. The high-voltage equipment 36 is installed on the upper side of the space under the bonnet 28, in an area extending from the center in the width direction to the other side in the width direction.

[0029] The hood 30 includes a plurality of panels that are separable from one another. Specifically, the hood 30 consists of a first panel 31, a second panel 32, and a third panel 33. Hereinafter, these will simply be referred to as panels 31 to 33. Although these panels are separable from one another, each individual panel (first panel 31, second panel 32, third panel 33) fits onto the body 27 in a predetermined position, connecting adjacent panels and forming a series of assembled hoods 30.

[0030] Each panel 31-33 is arranged so that the edges of adjacent panels overlap. Specifically, the edge of panel 31 is positioned lower than the edge of panel 33 (Figure 7). Also, the edge of panel 31 is positioned lower than the edge of panel 32 (Figure 7). Also, the edge of panel 32 is positioned lower than the edge of panel 33. Therefore, panels 31-33 are assembled to the body 27 in this order. Conversely, when opening the hood 30, the panels must be removed in the order of 33, 32, and 31, from top to bottom. Panel 33 is larger than panels 31 and 32. Because panel 33 is the first to be removed and is larger, the risk of unintentionally opening the hood 30 is reduced.

[0031] Figure 3 is a plan view showing the same embodiment. Panel 31 is positioned on one side of the width direction of the upper slewing body 21, specifically behind the cabin 26. Panel 32 is positioned on the other side of the width direction of the upper slewing body 21, specifically to the right as viewed from the pilot inside the cabin 26. Panel 33 is positioned on the other side of the width direction of the upper slewing body 21, specifically behind and to the right as viewed from the pilot. In the following description, the front, rear, left, and right directions as viewed from the pilot will also be simply referred to as front, rear, left, and right.

[0032] Figure 4 is a rear view showing the same embodiment. Referring to Figures 3 and 4, and also to the perspective view of Figure 1, the panel 31 includes an edge 31a of a constant height, upward-facing upper walls 31b and 31d, a left wall 31c which is a left-facing (or upward and slightly upward) vertical wall located between the upper walls 31b and 31d and rising from the upper wall 31b to connect to the upper wall 31d, and a rear wall 31j which is a substantially rearward-facing vertical wall rising from the edge 31a to connect to the upper wall 31d. The upper wall 31b is at approximately the same height as the edge 31a or higher than the edge 31a. The upper wall 31d is higher than the upper wall 31b.

[0033] Panel 32 includes an edge 32a of a certain height and a front wall 32f which is a forward-facing (or forward-facing and slightly upward-facing) vertical wall rising from the edge 32a. Panel 33 includes an edge 33a of a certain height, a right wall 33g which is a right-facing vertical wall rising from the edge 33a, and a rear wall 33j which is a backward-facing vertical wall rising from the edge 32a.

[0034] The edges 31a, 32a, and 33a of each panel 31-33 are aligned along the upper edge of the body 27 (Figure 1) and fixed to the upper edge of the body 27 with bolts 42, which are fixing means. By loosening the bolts 42, each panel 31-33 can be removed from the body 27. With each panel 31-33 placed over the body 27, adjacent panels 31 and 33 are connected via grooves 43, adjacent panels 31 and 32 are also connected via grooves 43, and adjacent panels 32 and 33 are connected via grooves 44.

[0035] Figure 5 is a plan view showing the space under the hood of the same embodiment, corresponding to the state with the hood in place as shown in Figure 3. Referring to Figure 5, the space under the hood includes a first section 28b, a second section 28c, and a third section 28d. The first section 28b occupies the area directly below panel 31. The second section 28c occupies the area directly below panel 32. The third section 28d occupies the area directly below panel 33.

[0036] Section 1 28b is mainly for equipment that requires relatively infrequent maintenance. Due to layout constraints, the radiator 37 is also installed in Section 1 28b, adjacent to the air intake 41. Section 3 28d is mainly for equipment that requires relatively frequent maintenance. Due to space constraints, the high-voltage equipment 36 is installed above Section 3 28d. The main power source battery (not shown) and the main power source inverter (not shown) are also located in Section 3 28d.

[0037] Section 28c is adjacent to the front of Section 38d. Cords, tubes, and hoses (not shown) extending from Section 128b are installed in Section 28c.

[0038] Figure 6 is a perspective view showing how rainwater and other water droplets land on the hood 30. When water droplets W fall on the hood 30, they flow down to the edges of each panel 31-33, flow through grooves 43 and 44 in the direction of arrows, or cross the aforementioned edges 31a, 32a, and 33a, and are discharged outside the hood 30. Groove 43 passes through the center of the hood 30 and extends in the front-to-back direction to the edge of the hood 30. Groove 44 passes through the center of the hood 30 and extends in the left-to-right direction, with one end connecting to groove 43 and the other end extending to the edge of the hood 30.

[0039] Figure 7 is a cross-sectional view of the groove 43. The groove 43 is contained within a gutter 35 formed on the edge of the lower panel 31. The edge 33k of the upper panel 33 is a wall that hangs downward and is housed in the gutter 35. The gutter 35 extends in the front-rear direction along the groove 43. Of the pair of groove side walls 35b and 35d of the gutter 35, the groove side wall 35b that is further from the panel 33 faces the edge 33k at a relatively small distance, forming the groove 43. The groove side wall 35d that is covered by the panel 33 faces the edge 33k at a relatively large distance. As a result, the cross-section of the gutter 35 is larger than the cross-section of the groove 43. Therefore, the bottom wall 35c of the gutter 35 can carry more water than the rainfall per unit time. The edge of the upper panel 33 becomes an overhang that covers the gutter 35 from above.

[0040] As shown by the arrows in Figure 7, when water droplets W flow down the panel 33 and enter the groove 43, the water flows through the gutter 35 and is quickly discharged outside the bonnet 30. Referring also to Figure 6, the groove 43 gradually or in a stepped manner descends from the center of the bonnet 30 toward the edge of the bonnet 30. The gutter 35 is similar. The cross-section of the groove 44 is the same as that of the groove 43 described above, and a gutter is provided extending along the groove 44. Note that the grooves 43, 44 and gutter 35 in this embodiment are provided to avoid the upper part of the air intake 41. The grooves 43, 44 and gutter 35 are deliberately not provided near the air intake 41.

[0041] Figure 8 is a perspective view showing the fixing means for the second panel and body of the same embodiment, representing the view of the electric construction machine 10 from the front upper to the rear lower and from the outside to the inside in the width direction. Referring to Figure 8, the fixing means for the panel 32 will be described. A bracket 29 is directly or indirectly attached and fixed to the mating material on which the bonnet 30 is placed, for example, the body 27. The bracket 29 extends in the width direction of the upper slewing body 21 and has an upper plate portion 29b, notches 29c, 29c formed at both ends of the upper plate portion 29b, and a lower plate portion 29d facing the upper plate portion 29b. The notches 29c are open at the front. The lower plate portion 29d is provided at least at both ends of the bracket 29.

[0042] A fixing plate 38 is positioned between the upper plate portion 29b and the lower plate portion 29d. The fixing plate 38 is a strip-shaped plate with two female screws 38h at both ends. The female screws 38h are, for example, nuts welded to the fixing plate.

[0043] Multiple through holes 32ah are formed in the edge 32a of the panel 32 through which bolts 42 are passed. A bolt 42 is passed through each through hole 32ah from above. The shaft of each bolt 42 is loosely screwed into the female thread 38h beforehand. This causes the fixing plate 38 to be suspended from the edge 32a.

[0044] When placing and securing the panel 32 to the body 27, move each bolt 42 and the suspended fixing plate 38 from front to back, inserting the shaft of each bolt 42 into each notch 29c, and placing the fixing plate 38 between the upper plate portion 29b and the lower plate portion 29d, so that the edge portion 32a rests on the body 27. Next, tighten each bolt 42 to secure the panel 32 to the body 27. Removing the panel 32 is done by reversing the procedure described above.

[0045] The bonnet 30 of this embodiment is a bonnet structure that covers high-voltage equipment 36 installed in the space 28 under the bonnet of an electric construction machine 10, and includes a plurality of panels 31 to 33, and the bonnet 30 is opened and the space 28 under the bonnet is exposed when the panels are separated from each other as shown in Figure 2. According to this embodiment, since it is necessary to separate the panels from each other in order to open the bonnet 30, accidental opening is suppressed. Therefore, it is possible to prevent the high-voltage equipment 36 from being exposed to water or workers from accidentally coming into contact with the high-voltage equipment 36.

[0046] Furthermore, since the bonnet 30 of this embodiment has a three-dimensional shape including upper walls 31b, 31d, 33e, a front wall 32f, rear walls 31j, 33j, a left wall 31c, and a right wall 33g, opening the bonnet 30 allows for a wide exposure of the space 28 under the bonnet. Consequently, it becomes easier to access equipment installed in the space 28 under the bonnet, and maintenance work by service technicians dealing with high-voltage equipment is made more efficient.

[0047] Furthermore, the under-bonnet space 28 in this embodiment includes a first section 28b and a second section 28c where equipment other than the high-voltage equipment 36 is installed, and a third section 28d where the high-voltage equipment 36 is installed. Panels 31 to 33 include panel 31 which covers the first section 28b, panel 32 which covers the second section 28c, and panel 33 which covers the first section 28d. This allows maintenance work to be performed by separating the panels for each section of the under-bonnet space 28.

[0048] Furthermore, according to this embodiment, since two of the multiple panels 31 to 33 are connected such that their edges overlap in the vertical direction, the order in which the panels 31 to 33 are removed is defined.

[0049] Furthermore, according to this embodiment, in accordance with the maintenance frequency of the equipment installed in each of the first to third sections 28b to 28d, the panel 31 covering equipment with a relatively low maintenance frequency is positioned relatively lower, and the panel 33 covering equipment with a relatively high maintenance frequency is positioned relatively upper. This eliminates the need to separate panels that require infrequent maintenance, thereby improving the efficiency of maintenance work.

[0050] Furthermore, according to this embodiment, as shown in Figure 7, grooves 43 are provided along the edges of the vertically overlapping panels 31 and 33. The grooves 43 constitute a gutter 35 and extend to the front and rear edges of the bonnet 30 at the same height, or gradually or in stages, as shown in Figure 6. Therefore, water droplets W that land on the bonnet 30 are discharged outside the bonnet 30 along the grooves 43. Similarly, groove 44 also extends to the right edge of the bonnet 30 with a gutter, and water droplets W are discharged outside the bonnet 30 along groove 44.

[0051] Furthermore, according to this embodiment, as shown in Figure 6, the ends of the grooves 43 and 44 are positioned to avoid being directly above the air intake 41 of the radiator 37 of the construction machine, so that water discharged outside the bonnet 30 does not enter the space inside the bonnet 28 from the air intake 41.

[0052] Although embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as the present invention, or within an equivalent scope. [Industrial applicability]

[0053] This invention is advantageously applicable to industrial machinery. [Explanation of Symbols]

[0054] 10 electric construction machines, 28 under-bonnet space, 28b Section 1, 28c Section 2, 28d Section 3, 30 Bonnet, 31 First panel, 32 Second panel, 33 Third panel, 31b, 31d, 33e, upper wall, 32f front wall (vertical wall), 31j,33j rear wall (vertical wall), 31c Left wall (vertical wall), 33g Right wall (vertical wall), 35 Gutter, 36 High-voltage equipment, 37 Radiator, 41 Air intake.

Claims

1. With respect to an electric construction machine that includes an electric motor as its main drive source, the structure of the bonnet that covers the high-voltage equipment for the electric motor installed in the space under the bonnet, The hood includes a plurality of panels that are attached and secured by fastening means requiring tools, A bonnet structure for an electric construction machine, wherein the bonnet is opened by releasing the mounting fasteners using the aforementioned tool.

2. The aforementioned hood is, The upper wall and The bonnet structure for an electric construction machine according to claim 1, which is a three-dimensional shape including at least one wall from among the four surfaces: a front wall, a rear wall, a left wall, and a right wall.

3. The space under the bonnet includes a first section and a second section where equipment other than the high-voltage equipment is installed, and a third section where the high-voltage equipment is installed. The bonnet structure for an electric construction machine according to claim 1, wherein the panel includes a first panel covering the first section, a second panel covering the second section, and a third panel covering the third section.

4. The bonnet structure for an electric construction machine according to claim 3, wherein the two panels are connected such that their edges overlap in the vertical direction.

5. The bonnet structure for an electric construction machine according to claim 4, wherein, corresponding to the maintenance frequency of the equipment installed in each of the first to third sections, the panel covering equipment with a relatively low maintenance frequency is positioned relatively lower, and the panel covering equipment with a relatively high maintenance frequency is positioned relatively upper.

6. The bonnet structure for an electric construction machine according to claim 4, wherein the lower edge is gutter-shaped and extends along the upper edge, and extends to the front edge, rear edge, left edge, or right edge of the bonnet at the same height, or in a stepped or gradually decreasing manner.

7. The bonnet structure for an electric construction machine according to claim 6, wherein the end of the gutter-shaped edge portion extending to any of the front edge, rear edge, left edge, or right edge of the bonnet is positioned to avoid directly above the radiator air intake of the construction machine.

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