Electric excavator

Abstract

The utility model provides an electric excavator. The electric excavator comprises a lower walking vehicle body, an upper rotating platform and an electric driving system. The upper rotary platform is rotationally mounted on the lower walking vehicle body; the electric driving system is mounted at the rear part of the upper rotary platform; the electric driving system comprises a power battery pack and a protective cover; the power battery pack is fixedly connected with the upper rotary platform; the protective cover covers the rear side of the power battery pack, and the bottom of the protective cover is fixedly connected with the upper rotary platform. The protective cover is fixedly arranged on the rear portion of the upper rotary platform, the protective cover is arranged on the rear side of the power battery pack, physical protection on the power battery pack can be achieved, and therefore the power battery pack can be protected even if the tail of the electric excavator collides with obstacles on a construction site or is subjected to other external force during construction. And the rear side of the power battery pack can be effectively protected by the protective cover. According to the scheme, the probability that the power battery is damaged when the power battery is subjected to external force can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to an electric excavator. Background Art

[0002] Electric excavators are mainly divided into three categories. The first category is the tow-type electric excavator, which is powered by an external cable. The second category is the electric excavator with a high-capacity power battery installed in the whole machine. The third category is the electric excavator that has both the first and second structures and functions.

[0003] As an engineering machine, electric excavators often work in harsh production environments. In the related art, the power battery protection capabilities of the second and third types of electric excavators are insufficient and are easily damaged when the power battery is subjected to external forces. Utility Model Content

[0004] The present application provides an electric excavator, which can improve the protection capability of the electric excavator equipped with a power battery and effectively reduce the probability of damage to the power battery when subjected to external force.

[0005] The present application provides an electric excavator, comprising:

[0006] Lower walking body;

[0007] An upper rotary platform is rotatably mounted on the lower traveling vehicle body; and

[0008] An electric drive system is installed at the rear of the upper rotary platform; the electric drive system comprises:

[0009] A power battery pack is fixedly connected to the upper rotating platform;

[0010] A protective cover is arranged on the rear side of the power battery pack and the bottom of the protective cover is fixedly connected to the upper rotating platform.

[0011] The solution provided by the present application can make the protective cover move together with the upper rotating platform by fixing the protective cover on the rear part of the upper rotating platform. Since the protective cover is arranged on the rear side of the power battery pack, physical protection of the power battery pack can be achieved. Therefore, even if the tail of the electric excavator collides with obstacles at the construction site or is subjected to other external forces during construction, the rear side of the power battery pack can also obtain effective protection from the protective cover, reducing the probability that the rear side structure of the power battery pack will change due to force, thereby causing battery failure or even safety accidents. It can be seen that this solution can improve the protection capability of the electric excavator equipped with a power battery, and effectively reduce the probability of damage to the power battery when subjected to external forces.

[0012] In some possible implementations, the protective cover has an opening, and an outer contour of the opening is larger than an outer contour of a rear side of the power battery pack.

[0013] In combination with the above implementations, in some possible implementations, the protective cover includes a side plate and a plurality of bent portions surrounding the side plate;

[0014] The rear side of the power battery pack is flush with the end surface of the bent portion, or

[0015] The rear side of the power battery pack is closer to the side plate than the end surface of the bent portion, and there is a distance between the side plate and the rear side of the power battery pack.

[0016] In combination with the above implementations, in some possible implementations, the power battery pack includes:

[0017] A protective frame, fixedly connected to the upper rotating platform;

[0018] A power battery pack is fixedly mounted on the protective frame;

[0019] Wherein, the outer contour of the protection frame is located outside the outer contour of the power battery pack.

[0020] In combination with the above implementations, in some possible implementations, the protection framework includes:

[0021] Support assemblies, at least two and spaced apart; and

[0022] at least one bearing assembly, the bearing assembly being disposed between the supporting assemblies;

[0023] The power battery pack is fixedly mounted on the carrying assembly.

[0024] In combination with the above implementations, in some possible implementations, the bearing component includes:

[0025] A vibration reduction device, fixed to the support assembly;

[0026] A bearing member, wherein the bearing member is connected to the supporting assembly through the vibration reduction device.

[0027] In combination with the above implementations, in some possible implementations, the support assembly includes a plurality of columns arranged at intervals;

[0028] The vibration reduction device comprises:

[0029] A support plate, horizontally arranged on the column;

[0030] an elastic member, fixedly disposed on at least the top of the top and the bottom of the support plate; the bearing member is mounted on the elastic member; and

[0031] A fastener is used to fixedly connect the support plate, the elastic member and the bearing member.

[0032] In combination with the above implementations, in some possible implementations, the protection framework further includes:

[0033] A connecting frame, used to connect the supporting assembly, the connecting frame is fixedly arranged on the top of the column; and / or

[0034] The base is fixedly connected to the upper rotating platform and is used to support the supporting assembly. The base is fixedly connected to the bottom of the column.

[0035] In combination with the above implementations, in some possible implementations, when the protection frame includes the base, the base is spaced apart from the bearing member;

[0036] A positioning pin is provided at the rear of the upper rotating platform, and a positioning hole adapted to the positioning pin is provided at the base;

[0037] When in use, the positioning pin cooperates with the axis of the positioning hole.

[0038] In combination with the above implementations, in some possible implementations, the carrier includes:

[0039] A first crossbeam and a second crossbeam, wherein two ends of the first crossbeam and the second crossbeam are respectively fixedly connected to a pair of the support assemblies; and

[0040] A plurality of load-bearing beams are arranged at intervals between the first cross beam and the second cross beam; two ends of the load-bearing beams are fixedly connected to the first cross beam and the second cross beam respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the embodiments below. The accompanying drawings are only for the purpose of illustrating the embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0042] Figure 1 It is a structural schematic diagram of an electric excavator provided by an embodiment of the present application from one perspective;

[0043] Figure 2 yes Figure 1 A schematic diagram of the structure of an electric excavator from another perspective;

[0044] Figure 3 yes Figure 1 Schematic diagram of the structure of an electric excavator omitting the power battery pack;

[0045] Figure 4 yes Figure 1 Schematic diagram of the structure of the protective frame in the electric excavator;

[0046] Figure 5 yes Figure 4 Schematic diagram of the explosion structure of the protection frame;

[0047] Figure 6 hour Figure 5 Schematic diagram of the structure of the vibration reduction device;

[0048] Figure 7 yes Figure 6 Schematic diagram of the explosion structure of the vibration reduction device.

[0049] The description of the reference numerals in the figures is as follows:

[0050] 100—upper rotary platform; 101—locating pin;

[0051] 201—power battery pack;

[0052] 1—Protective frame;

[0053] 11—support assembly; 111—column;

[0054] 12—carrying components;

[0055] 121—vibration reduction device; 1211—support plate; 1212—mounting hole; 1213—elastic member; 1214—clamping portion; 1215—positioning boss; 1216—through hole;

[0056] 122—carrying member; 1221—first beam; 1222—second beam; 1223—carrying beam;

[0057] 13—connecting frame;

[0058] 14—base; 141—positioning hole; 142—reinforcement plate;

[0059] 2—Power battery pack;

[0060] 202—protective cover; 2021—opening; 2022—side plate; 2023—bending portion. DETAILED DESCRIPTION

[0061] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0063] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0064] Electric excavators are mainly divided into three categories. The first category is the tow-type electric excavator, which is powered by an external cable. The second category is the electric excavator with a high-capacity power battery installed in the whole machine. The third category is the electric excavator that has both the first and second structures and functions.

[0065] As an engineering machine, electric excavators often work in harsh production environments. In the related art, the power battery protection capabilities of the second and third types of electric excavators are insufficient and are easily damaged when the power battery is subjected to external forces.

[0066] In order to solve the above technical problems, an embodiment of the present application provides an electric excavator. An electric excavator provided by an embodiment of the present application is introduced below with reference to the accompanying drawings of the specification.

[0067] First, please refer to Figure 1 , Figure 2 and Figure 3 The electric excavator proposed in the present application includes a lower traveling vehicle body, an upper rotating platform 100 and an electric drive system. The upper rotating platform 100 is rotatably mounted on the lower traveling vehicle body; the electric drive system is mounted on the rear of the upper rotating platform 100; the electric drive system includes a power battery pack 201 and a protective cover 202, the power battery pack 201 is fixedly connected to the upper rotating platform 100; the protective cover 202 covers the rear side of the power battery pack 201 and is fixedly connected to the upper rotating platform 100 at the bottom.

[0068] In the description of the embodiments of the present application, the directions or positional relationships indicated by technical terms such as "up", "down", "front", "back", "left", "right", "top" and "bottom" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description. They do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0069] The solution provided in the embodiment of the present application is that by fixing the protective cover 202 at the rear of the upper rotating platform 100, the protective cover 202 can be made to move together with the upper rotating platform 100. Since the protective cover 202 is arranged on the rear side of the power battery pack 201, physical protection of the power battery pack 201 can be achieved. Therefore, even if the tail of the electric excavator collides with obstacles at the construction site or is subjected to other external forces during construction, the rear side of the power battery pack 201 can also obtain effective protection from the protective cover 202, reducing the probability that the rear side structure of the power battery pack 201 changes due to force, thereby causing battery failure or even safety accidents. It can be seen that this solution can improve the protection capability of the electric excavator equipped with a power battery, and effectively reduce the probability of damage to the power battery when subjected to external forces.

[0070] The following combination Figures 1 to 7 The specific structure of the electric excavator is introduced in detail.

[0071] Although not shown in the figure, it can be understood that the lower walking body, as the basis of the electric excavator, can provide an installation platform for the upper rotary platform 100, the electric drive system and other auxiliary machinery and electrical equipment. In addition, the lower walking body also has a crawler walking mechanism to realize the walking drive of the electric excavator. The crawler walking mechanism uses crawlers, which have a large ground contact area. In addition, the patterns and spikes on the crawlers have strong gripping ability, so it has strong passing ability, and also has the advantages of strong load-bearing and climbing ability.

[0072] The upper slewing platform 100 is rotatably mounted on the lower traveling vehicle body; illustratively, the upper slewing platform 100 can be mounted on the lower traveling vehicle body via a slewing bearing assembly, so that the upper slewing platform 100 can slew 360° relative to the lower traveling vehicle body. The details of the slewing bearing assembly are not relevant to the present application, so for the sake of clarity, they are not described here.

[0073] The electric drive system is installed at the rear of the upper rotary platform 100 to supply power to the drive motor of the electric excavator. The electric drive system includes a power battery pack 201 and a protective cover 202. The power battery pack 201 is fixedly connected to the upper rotary platform 100. Figure 1 and Figure 2The installation position of the power battery pack 201 on the upper rotating platform 100 is shown by way of example. It can be clearly seen from the figure that the power battery pack 201 includes a protection frame 1 and a power battery pack 2. The protection frame 1 is fixedly connected to the upper rotating platform 100; the power battery pack 2 is fixedly arranged on the protection frame 1; the outer contour of the protection frame 1 is located outside the outer contour of the power battery pack 2. In this way, the protection frame 1 is distributed around the power battery pack 2 and can wrap the power battery pack 2, thereby replacing the power battery pack 2 to withstand the effects of external forces such as collisions, and effectively improving the reliability and safety of the power battery pack 2.

[0074] Figure 3 The installation position of the protection frame 1 on the upper rotary platform 100 is shown as an example. Figure 4 The schematic diagram of the structure of the protection frame 1 is shown as an example. Figure 5 Shows Figure 4 Exploded view of the protection frame 1. As can be seen from the above figure, the protection frame 1 includes a supporting component 11 and a bearing component 12.

[0075] There are at least two support components 11 and they are arranged at intervals. Among them, the support components 11 can be two, three, four, etc., for example Figure 4 The protective frame 1 includes three support assemblies 11, specifically, one support assembly 11 at the front and one at the back, and another support assembly 11 between the front and rear support assemblies 11. The number of support assemblies 11 is determined according to the number of power battery packs 2 installed on the protective frame 1, and those skilled in the art can flexibly set them according to actual needs. Each support assembly 11 may include a plurality of columns 111 arranged at intervals, such as Figure 5 As shown in FIG. 1 , each support assembly 11 includes two spaced columns 111. In order to facilitate the processing and manufacture of the support assembly 11, the columns 111 can be Figure 5 The channel steel can also be made of angle steel, steel pipe, etc.

[0076] At least one load-bearing assembly 12 is disposed between the support assemblies 11 and is used to provide support for the power battery pack 2. The power battery pack 2 is fixedly mounted on the load-bearing assembly 12. The load-bearing assembly 12 includes a load-bearing member 122. The load-bearing member 122 can have various structural forms, for example, Figure 5 The frame structure shown in the figure may also be a plate-like structure. The bearing member 122 of the frame structure may include a plurality of cross beams and longitudinal beams. Figure 5, the bearing member 122 may include a first crossbeam 1221, a second crossbeam 1222 and a plurality of bearing beams 1223. Among them, "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. The number of bearing beams 1223 can be two, three, four, five, six, etc. The two ends of the first crossbeam 1221 and the second crossbeam 1222 are respectively fixedly connected to a pair of support assemblies 11; the bearing beam 1223 is arranged between the first crossbeam 1221 and the second crossbeam 1222 at intervals; the two ends of the bearing beam 1223 are respectively fixedly connected to the first crossbeam 1221 and the second crossbeam 1222.

[0077] The number of the carriers 122 is also determined according to the number of the power battery packs 2 on the protection frame 1, and those skilled in the art can flexibly set it according to actual needs. It is understandable that the carrier 122 can be one, two, three, four, etc. When the number of the carriers 122 is more than two, the carriers 122 are stacked up and down, and a space for placing the power battery pack 2 is reserved between two adjacent carriers 122. Figure 5 Three bearing members 122 are shown in the figure. The structures of the three bearing members 122 are the same. Each bearing member 122 includes a first crossbeam 1221 and a second crossbeam 1222 . Four bearing beams 1223 are arranged between the first crossbeam 1221 and the second crossbeam 1222 .

[0078] Please continue to see Figure 5 In some embodiments, the protective frame 1 further includes a connecting frame 13 and / or a base 14. In the description of the embodiments of the present application, the term "and / or" is merely a description of an association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. Specifically, the protective frame 1 may include only the connecting frame 13, only the base 14, or both the connecting frame 13 and the base 14.

[0079] The connecting frame 13 is used to connect the supporting assembly 11. The connecting frame 13 is fixedly arranged on the top of the column 111, and can protect the power battery pack 2 installed on the bearing member 122 at the lower side of the connecting frame 13. Figure 5 The structure of the connecting frame 13 is similar to that of the bearing member 122, except that the connecting frame 13 does not support the power battery pack 2. For the sake of brevity, the structure of the connecting frame 13 is not described in detail in the embodiment of the present application.

[0080] The base 14 is fixedly connected to the upper rotating platform 100 and is used to support the supporting assembly 11. The base 14 is fixedly connected to the bottom of the column 111. Figure 5The structure of the base 14 is similar to that of the bearing member 122 , except that the base 14 further includes a reinforcing plate 142 arranged on the side, and the reinforcing plate 142 is connected to the column 111 , which can enhance the connection strength between the base 14 and the supporting assembly 11 .

[0081] It should be noted that Figures 3 to 5 Before the protective frame 1 described in the above is installed on the upper rotating platform 100, the supporting assembly 11, the bearing assembly 12, the connecting frame 13 and the base 14 are first assembled into an integral protective frame 1, and then the protective frame 1 is transferred to the upper rotating platform 100 by hoisting and then fixed. In order to facilitate the installation of the protective frame 1, in some embodiments of the present application, the base 14 and the bearing member 122 are arranged at intervals, and a positioning pin 101 is arranged at the rear of the upper rotating platform 100, and the base 14 is provided with a positioning hole 141 adapted to the positioning pin 101; when hoisting the protective frame 1, it is only necessary to align the positioning pin 101 with the positioning hole 141 and release it, so that the positioning pin 101 can cooperate with the hole axis of the positioning hole 141, and subsequently, it is only necessary to fix the base 14 and the upper rotating platform 100 by bolting or welding, so that the installation of the protective frame 1 on the upper rotating platform 100 can be realized.

[0082] Considering that when the electric excavator is working, the power battery pack 201 is not only subjected to external forces such as collision from the outside, but also subjected to the vibration generated by the excavator itself when working. In order to improve the vibration resistance of the power battery pack 201, the bearing assembly 12 may also include a vibration reduction device 121, and the vibration reduction device 121 is fixed to the support assembly 11, that is, fixed to the column 111 of the support assembly 11. At this time, see Figure 5 The bearing member 122 can be connected to the supporting assembly 11 through multiple vibration reduction devices 121.

[0083] The vibration reduction device 121 can use an elastic member 1213 such as a spring or rubber. When subjected to an external force, the elastic member 1213 deforms. When the external force is removed, the elastic member 1213 can return to its original state using its own restoring elastic force, thereby achieving a vibration reduction effect.

[0084] Figure 6 The schematic diagram of the structure of a vibration reduction device 121 is shown as an example. Figure 7 yes Figure 6 Schematic diagram of the explosion. Figure 6 and Figure 7 As shown, the vibration reduction device 121 may include a support plate 1211, an elastic member 1213 and a fastener. The support plate 1211 is horizontally arranged on the column 111, see Figure 7In order to facilitate the fixed connection between the support plate 1211 and the column 111, clamping parts 1214 can be provided at both ends of the support plate 1211 on the side close to the column 111, and the distance between the clamping parts 1214 is the width of the column 111. When installing the support plate 1211, it is only necessary to clamp the clamping parts 1214 onto the column 111, and then fix the support plate 1211 to the column 111 by bolt connection or welding.

[0085] The elastic member 1213 is fixedly arranged on at least the top of the top and bottom of the support plate 1211, that is, the elastic member 1213 can be arranged only on the top of the support plate 1211; in addition, on this basis, the elastic member 1213 can also be arranged on the bottom of the support plate 1211. The elastic member 1213 is arranged on the top and bottom of the support plate 1211, which can better absorb the vibrations in both the upward and downward directions generated by the electric excavator. In order to ensure the firm connection and convenient installation of the bearing member 122, whether the elastic member 1213 is arranged only on the top of the support plate 1211 or on the top and bottom of the support plate 1211, the bearing member 122 is mounted on the elastic member 1213.

[0086] The elastic member 1213 disposed at the top and bottom of the support plate 1211 may be an integral structure or may be a Figure 7 The split structure shown, in other words, can include two elastic members 1213. In order to facilitate the installation of the elastic member 1213, a mounting hole 1212 can be provided on the support plate 1211, and a positioning boss 1215 is provided on the elastic member 1213. The positioning boss 1215 is inserted into the mounting hole 1212, and the installation and positioning of the elastic member 1213 on the support plate 1211 can be conveniently realized.

[0087] The fastener (not shown in the figure) is fixedly connected to the support plate 1211, the elastic member 1213 and the bearing member 122. For example, the fastener may be a locking bolt, and the elastic member 1213 may be provided with a through hole 1216. One end of the locking bolt passes through the support plate 1211, the elastic member 1213 and the bearing member 122 through the through hole 1216 and the mounting hole 1212 and is threadedly connected with a nut, so that the support plate 1211, the elastic member 1213 and the bearing member 122 can be fixedly connected.

[0088] See also Figure 1 , Figure 2 and Figure 3, the protective cover 202 is arranged on the rear side of the power battery pack 201 and the bottom is fixedly connected to the upper rotating platform 100. By fixing the protective cover 202 on the rear of the upper rotating platform 100, the protective cover 202 can be moved together with the upper rotating platform 100. Since the protective cover 202 is arranged on the rear side of the power battery pack 201, physical protection of the power battery pack 201 can be achieved. Therefore, even if the tail of the electric excavator collides with obstacles at the construction site or is subjected to other external forces during construction, the rear side of the power battery pack 201 can also obtain effective protection from the protective cover 202, reducing the rear side structure of the power battery pack 201 due to force changes, thereby causing battery failure, or even the probability of safety accidents. It can be seen that this solution can improve the protection capability of the electric excavator equipped with a power battery, and effectively reduce the probability of damage to the power battery when subjected to external forces.

[0089] The protective cover 202 has an opening 2021, the outer contour of the opening 2021 is larger than the outer contour of the rear side of the power battery pack 201, so that the projection of the rear side of the power battery pack 201 is completely within the opening 2021. In this way, the protective cover 202 can completely protect the rear side of the power battery pack 201.

[0090] The protective cover 202 may have various structural forms. In one possible implementation, the protective cover 202 may be a frame structure. In another possible implementation, the protective cover 202 may be a plate structure. Figures 1 to 3 , the protective cover 202 may include a side plate 2022 and a plurality of bends 2023 surrounding the side plate 2022; the side plate 2022 and the bends 2023 may be connected by a curved surface with a smooth transition. Wherein "plurality" refers to more than two, specifically two, three, four, etc. For example, the protective cover 202 in the figure may include a bend 2023 located at the top and a bend 2023 located on each of the left and right sides, that is, a total of three bends 2023. The purpose of not providing a bend 2023 at the bottom of the protective cover 202 is to facilitate fixed connection with the upper rotating platform 100. For example, a plurality of extension ends may be extended from the rear of the upper rotating platform 100, and a mounting groove or hole may be provided at the bottom of the side plate 2022 of the protective cover 202. The protective cover 202 is fixedly connected to the upper rotating platform 100 by the cooperation of the extension end with the mounting groove or hole, and in combination with fixing methods such as bolt connection and welding.

[0091] The rear side of the power battery pack 201 may only be flush with the end surface of the bent portion 2023, so that the protective cover 202 can only provide protection for the rear side of the power battery pack 201. In addition, the rear side of the power battery pack 201 can also be arranged closer to the side plate 2022 relative to the end surface of the bent portion 2023, that is, the rear side of the power battery pack 201 partially extends into the protective cover 202, so that the protective cover 202 can not only provide protection for the rear side of the power battery pack 201, but also provide protection for the part of the peripheral side of the power battery pack 201 extending into the protective cover 202. It should be noted that in order to ensure that the protective cover 202 can provide sufficient buffering when it is subjected to external forces such as impact, the part of the rear side of the power battery pack 201 extending into the protective cover 202 should not be too long, that is, there is a gap between the side plate 2022 of the protective cover 202 and the rear side of the power battery pack 201. Designers can flexibly set the size of the spacing according to the deformation of the side panel 2022 after being subjected to external force, and this application does not make specific limitations on this.

[0092] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An electric excavator, characterized in that: include: Lower walking body; An upper rotating platform (100) is rotatably mounted on the lower traveling vehicle body; as well as An electric drive system is installed at the rear of the upper rotary platform (100); the electric drive system comprises: A power battery pack (201) is fixedly connected to the upper rotating platform (100); A protective cover (202) is arranged on the rear side of the power battery pack (201) and the bottom of the protective cover is fixedly connected to the upper rotating platform (100).

2. The electric excavator according to claim 1, characterized in that: The protective cover (202) has an opening (2021), and the outer contour of the opening (2021) is larger than the outer contour of the rear side of the power battery pack (201).

3. The electric excavator according to claim 1, characterized in that: The protective cover (202) comprises a side plate (2022) and a plurality of bent portions (2023) surrounding the side plate (2022); The rear side of the power battery pack (201) is flush with the end surface of the bent portion (2023), or The rear side of the power battery pack (201) is closer to the side plate (2022) relative to the end surface of the bent portion (2023), and there is a distance between the side plate (2022) and the rear side of the power battery pack (201).

4. The electric excavator according to any one of claims 1 to 3, characterized in that: The power battery pack (201) comprises: A protective frame (1) fixedly connected to the upper rotating platform (100); A power battery pack (2) is fixedly mounted on the protective frame (1); Wherein, the outer contour of the protection frame (1) is located outside the outer contour of the power battery pack (2).

5. The electric excavator according to claim 4, characterized in that: The protective frame (1) comprises: Support components (11), at least two and spaced apart; and at least one bearing assembly (12), the bearing assembly (12) being arranged between the supporting assemblies (11); The power battery pack (2) is fixedly mounted on the bearing assembly (12).

6. The electric excavator according to claim 5, characterized in that: The bearing assembly (12) comprises: A vibration reduction device (121) fixed to the support assembly (11); A bearing member (122), wherein the bearing member (122) is connected to the supporting assembly (11) via the vibration reduction device (121).

7. The electric excavator according to claim 6, characterized in that: The support assembly (11) comprises a plurality of columns (111) arranged at intervals; The vibration reduction device (121) comprises: A support plate (1211) is horizontally arranged on the column (111); An elastic member (1213) is fixedly disposed on at least the top of the top and the bottom of the support plate (1211); the bearing member (122) is mounted on the elastic member (1213); and A fastener fixedly connects the support plate (1211), the elastic member (1213) and the bearing member (122).

8. The electric excavator according to claim 7, characterized in that: The protective frame (1) further comprises: A connecting frame (13) for connecting the supporting assembly (11), wherein the connecting frame (13) is fixedly arranged on the top of the column (111); and / or A base (14) is fixedly connected to the upper rotating platform (100) and is used to support the supporting assembly (11); the base (14) is fixedly connected to the bottom of the column (111).

9. The electric excavator according to claim 8, characterized in that: When the protection frame (1) includes the base (14), the base (14) and the bearing member (122) are spaced apart from each other; A positioning pin (101) is provided at the rear of the upper rotating platform (100), and a positioning hole (141) adapted to the positioning pin (101) is provided on the base (14); When in use, the positioning pin (101) is axially matched with the positioning hole (141).

10. The electric excavator according to claim 6, characterized in that: The carrier (122) comprises: A first crossbeam (1221) and a second crossbeam (1222), wherein two ends of the first crossbeam (1221) and the second crossbeam (1222) are respectively fixedly connected to a pair of the support assemblies (11); and A plurality of load-bearing beams (1223) are arranged at intervals between the first crossbeam (1221) and the second crossbeam (1222); two ends of the load-bearing beams (1223) are respectively fixedly connected to the first crossbeam (1221) and the second crossbeam (1222).

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