Power supply device and electric excavator

Abstract

The present application relates to the field of operation machinery. Provided are a power supply device and an electric excavator. The power supply device comprises: a first cable, which is configured to be electrically connected to a power distribution device; a cable reel, which is mounted on a dozer blade assembly, the cable reel being provided with a cable leading-in port and a cable leading-out port, the cable leading-in port being connected to the first cable, and the cable reel being configured to wind and unwind the first cable; and a second cable, which has two ends respectively connected to the cable leading-out port and an electrical appliance of an excavator. The cable reel is arranged on a dozer blade assembly, so that the cable reel is connected to a travel chassis of the excavator by means of the dozer blade assembly. Since the dozer blade assembly is a structure of the excavator itself, compared with a cable reel being mounted on the travel chassis by means of a special mounting frame, the cable reel being arranged on the dozer blade assembly involves smaller changes in the structure of the excavator itself, and thus the cost is lower.

Description

Power supply device and electric excavator

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on October 7, 2023, with application number 202322677659.8 and invention name “Power Supply Device and Electric Excavator”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of operating machinery, and in particular to a power supply device and an electric excavator. Background Art

[0004] Existing excavators are categorized by their drive mode as either fuel-powered or electric-powered. Fuel-powered excavators require regular diesel fueling, resulting in high energy consumption, environmental pollution from exhaust emissions, and high engine noise. Furthermore, diesel-powered excavators often suffer from difficulties starting at low temperatures and insufficient power at high altitudes or in tunnels due to incomplete combustion caused by oxygen depletion.

[0005] In order to solve the above problems, electric excavators have gradually developed. Some electric excavators usually use cables as external power supplies, but most electric excavators are not equipped with cable retraction devices, which makes the equipment extremely inconvenient to move during operation. At the same time, the cables are dragged on the ground for a long time, which accelerates the wear of the cables and also poses the risk of the machine crushing the cables.

[0006] In order to solve the problem of cable wear, in related technologies, electric excavators are provided with a retracting and releasing device for retracting and releasing the cable. The retracting and releasing device needs to be installed on a specially designed mounting frame, and the mounting frame is usually welded to the walking chassis of the electric excavator. This causes significant structural changes to the excavator and has high manufacturing costs.

[0007] Summary of the Invention

[0008] The present application provides a power supply device and an electric excavator, which are used to solve the defect in the related art that a special mounting frame is required to install the cable reel on the walking chassis, resulting in a major structural change to the excavator, and to achieve the effect of installing the cable reel based on the excavator's own structure.

[0009] The present application provides a power supply device for supplying power to an excavator equipped with a bulldozer assembly, comprising:

[0010] a first cable configured to be electrically connected to a power distribution device;

[0011] a cable reel, the cable reel being mounted on the bulldozer assembly, the cable reel being provided with a cable introduction port and a cable outlet port, the cable introduction port being connected to the first cable, the cable reel being configured to retract and release the first cable;

[0012] A second cable, with two ends of the second cable respectively connected to the cable outlet port and the electrical appliances of the excavator.

[0013] According to a power supply device provided herein, the excavator is provided with a power supply interface connected to the electrical appliance, the second cable is detachably connected to the power supply interface, and the cable reel is detachably mounted to the bulldozer assembly. By detachably connecting the second cable to the power supply interface and the cable reel to the bulldozer assembly, the excavator can freely switch between a charging mode and a towing mode.

[0014] The power supply device provided herein further includes a charging gun adapted for the power supply interface, and the second cable is connected to the power supply interface via the charging gun. This allows the operator to directly hold the charging gun to engage or disengage the charging gun from the power supply interface, making operation faster and more convenient.

[0015] According to a power supply device provided in the present application, the power supply device further includes a bearing seat, the bearing seat being connected to the cab of the excavator, the second cable being connected to the bearing seat, and the connection point between the second cable and the bearing seat being located between the two ends of the second cable. By connecting the bearing seat to a position between the two ends of the second cable, during the rotation of the excavator, the force point of the second cable is transferred to the connection between the bearing seat and the second cable, rather than falling on the structurally weak connection between the charging gun and the charging interface, thereby reducing the force between the charging gun and the power supply interface, thereby achieving the effect of protecting the charging gun and the power supply interface.

[0016] According to a power supply device provided herein, the support base is detachably connected to the cab, and / or the second cable is detachably connected to the support base. The detachable connection of the second cable to the support base allows the second cable to be removed from the support base in a purely electric mode. The detachable connection of the support base to the cab allows the support base to be removed from the cab in a purely electric mode, thereby simplifying the excavator's structure and optimizing its overall weight.

[0017] According to a power supply device provided herein, the support base includes a main bracket, a main shaft, and a yaw bracket. The main bracket is detachably connected to the cab, the main shaft is fixedly connected to the main bracket, and the yaw bracket is rotatably connected to the main shaft. The yaw bracket can swing left and right around the main shaft, thereby preventing the second cable from being pulled during left and right rotation of the excavator.

[0018] According to the power supply device provided by the present application, the main bracket is configured in an inverted U-shape, and both ends of the main bracket are detachably connected to the cab via connecting seats. This allows the load-bearing seat to be connected using the existing structure of the cab, and the load-bearing seat can be connected when needed and removed when not needed, allowing for flexible operation according to needs.

[0019] According to a power supply device provided herein, the deflection bracket is provided with a cable connection portion, and the second cable is detachably connected to the cable support portion. This arrangement allows the second cable to be removed from the support seat in pure electric operation mode; and the friction between the second cable and the cable connection portion can balance the tension exerted on the second cable.

[0020] According to a power supply device provided by the present application, limit points are respectively provided on both sides of the bottom of the main shaft to limit the rotation of the yaw bracket within the set range between the limit points. When the yaw bracket yaws to a limit point in any direction, the position of the limit point is the limit position of the yaw bracket's swing, thereby preventing the yaw bracket from continuing to rotate, thereby protecting the yaw bracket and preventing the yaw bracket and the cab from being subjected to excessive force when the yaw bracket drags the second cable. According to a power supply device provided by the present application, it also includes a mounting seat, and the cable reel is connected to the bulldozer assembly through the mounting seat. The cable reel is installed on the bulldozer assembly through the mounting seat, and the mounting seat is respectively docked with the cable reel and the bulldozer assembly, which can reduce the problem that the installation position of the cable reel is limited by the size of the installation surface of the bulldozer assembly, so that the cable reel can have a more suitable installation position on the bulldozer assembly.

[0021] According to the power supply device provided herein, the mounting base is detachably connected to the bulldozer blade assembly. This arrangement allows the mounting base to be removed from the bulldozer blade assembly in pure electric operation, thereby simplifying the structure of the bulldozer blade assembly, restoring all of its original functions, and reducing its weight.

[0022] According to a power supply device provided herein, the bulldozer blade assembly includes a pair of arms and a blade, wherein the pair of arms are connected to the blade, and the mounting base is connected to the pair of arms. Since the arms are typically columnar or rod-shaped, i.e., the arms have a relatively regular structure, connecting the mounting base to the arms simplifies the connection structure between the mounting base and the arms.

[0023] According to a power supply device provided herein, the mounting base is configured as a frame structure, and / or the cable reel is detachably connected to the mounting base. By configuring the mounting base as a frame structure, the weight of the mounting base can be reduced. The detachable connection between the cable reel and the mounting base allows the cable reel to be disassembled, repaired, or replaced in the event of a malfunction.

[0024] The present application also provides an electric excavator, comprising a bulldozer and the power supply device as described above.

[0025] The power supply device provided by the present application can transmit the electric energy of the power distribution device to the excavator through the first cable, the cable reel and the second cable connected in sequence, thereby supplying power to the excavator. The first cable can also be retracted and released through the cable reel. For example, when the excavator is far away from the power distribution device, the first cable is released, and when the excavator is close to the power distribution device, the first cable is reeled in, thereby reducing the problem of the first cable being dragged on the ground and worn. By arranging the cable reel on the bulldozer assembly, that is, the cable reel is connected to the walking chassis of the excavator through the bulldozer assembly, and since the bulldozer assembly is the structure of the excavator itself, the cable reel is arranged on the bulldozer assembly. Compared with installing the cable reel on the walking chassis through a special mounting frame, the modification to the structure of the excavator itself is smaller, so the cost is lower.

[0026] The electric excavator provided in the present application includes the power supply device provided in the present application, and therefore also includes all the above-mentioned advantages of the power supply device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] FIG1 is a schematic structural diagram of an electric excavator provided with a power supply device in some embodiments of the present application;

[0029] FIG2 is a schematic structural diagram of a mounting base provided in some embodiments of the present application installed on a bulldozer blade assembly;

[0030] FIG3 is a schematic diagram of the structure of a cable reel installed on a mounting base provided in some embodiments of the present application;

[0031] FIG4 is a schematic diagram of the connection structure between the mounting base and the arm provided in some embodiments of the present application;

[0032] FIG5 is a schematic structural diagram of a mounting base provided in some embodiments of the present application;

[0033] FIG6 is a schematic structural diagram of a supporting base provided in some embodiments of the present application;

[0034] FIG7 is a schematic structural diagram of a support provided in some embodiments of the present application installed in a cab.

[0035] Figure markings: 1. Bulldozer blade assembly; 101. Boom; 102. Blade; 2. First cable; 3. Cable reel; 4. Second cable; 5. Power supply interface; 6. Charging gun; 7. Support seat; 701. Main bracket; 702. Main shaft; 703. Yaw bracket; 7031. Cable connection part; 704. Connecting seat; 8. Cab; 801. Pillar; 9. Mounting seat; 901. Connecting column; 10. U-bolt; 12. Power distribution device. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0037] The power supply device provided in the embodiment of the present application is described below with reference to FIG. 1 to FIG. 5 .

[0038] Specifically, the power supply device is used to supply power to an excavator provided with a bulldozer assembly 1. The power supply device includes a first cable 2, a cable drum 3 and a second cable 4.

[0039] The first cable 2 is configured to be electrically connected to a power distribution device 12. For example, the power distribution device 12 may be a power distribution cabinet. The first cable 2 may be a tensile-resistant cable made of a tensile-resistant material to improve the tensile strength of the first cable 2 and reduce the risk of damage to the first cable 2 due to pulling during the operation of the excavator.

[0040] The cable reel 3 is mounted above the bulldozer assembly 1. The cable reel 3 is provided with a cable entry port and a cable exit port. The cable entry port is connected to the first cable 2, and the cable reel 3 is configured to reel in and out the first cable 2. In this embodiment, the cable reel 3 is provided with a support and a reel rotatably connected to the support, and the reel is configured to reel in and out the first cable 2. The support is connected to the bulldozer assembly 1. The cable reel 3 is also provided with an electric slip ring, the rotor of the electric slip ring is connected to the reel, and the stator of the electric slip ring is connected to the support. The cable entry port is provided on the reel, and the cable exit port is provided on the support. The cable entry port and the cable exit port are connected via the electric slip ring. In this way, during the process of the cable reel 3 reeling in and out the first cable 2, the electrical energy of the first cable 2 can always be transmitted to the cable exit port through the electric slip ring. The cable reel 3 can be driven by an electric motor or a hydraulic motor to reel in and out the first cable 2. Optionally, the cable reel 3 is further provided with a cable arranging device configured to assist in winding the first cable 2 around the cable reel 3. It should be noted that at least one of the cable entry port and the cable exit port is configured as a plug interface, to which the cable can be connected via a plug. Alternatively, at least one of the cable entry port and the cable exit port is provided with a threaded hole, and the cable is wound around a threaded fastener, which threadably engages with the threaded hole to compress and secure the cable.

[0041] The two ends of the second cable 4 are respectively connected to the cable outlet port and the electrical appliances of the excavator, that is, the second cable 4 is configured to transmit the electrical energy of the cable outlet port to the electrical appliances. Specifically, the second cable 4 and the first cable 2 are respectively connected to the cable outlet port and the cable introduction port of the cable reel 3, and the second cable 4 is electrically connected to the first cable 2 through the cable reel 3. The electrical appliances include but are not limited to the motor and power battery of the excavator. It should be noted that since the cable reel 3 is arranged on the walking chassis of the excavator, the cable reel 3 does not rotate synchronously with the vehicle assembly during the rotation of the excavator, so the length of the second cable 4 should meet the requirements of the excavator's rotation operation, and the specific length of the second cable 4 can be obtained based on calculation and is not limited to this.

[0042] The power supply device provided in the embodiment of the present application can transmit the electric energy of the distribution device 12 to the excavator through the first cable 2, the cable reel 3 and the second cable 4 connected in sequence, thereby supplying power to the excavator. The first cable 2 can also be retracted and released through the cable reel 3. For example, when the excavator is away from the distribution device 12, the first cable 2 is released, and when the excavator is close to the distribution device 12, the first cable 2 is reeled in, thereby reducing the problem of the first cable 2 being worn by dragging on the ground. By arranging the cable reel 3 on the bulldozer assembly 1, that is, the cable reel 3 is connected to the walking chassis of the excavator through the bulldozer assembly 1, and since the bulldozer assembly 1 is the structure of the excavator itself, the cable reel 3 is arranged on the bulldozer assembly 1. Compared with installing the cable reel 3 on the walking chassis through a special mounting frame, the modification to the structure of the excavator itself is smaller, and therefore the cost is lower.

[0043] Optionally, the cable drum 3 is mounted on the top of the bulldozer blade assembly 1, thereby minimizing the restriction on the original function of the bulldozer blade assembly 1. The original function of the bulldozer blade assembly 1 includes but is not limited to leveling or flattening the ground.

[0044] In some embodiments provided herein, the excavator is provided with a power supply interface 5 connected to an electrical appliance, the second cable 4 is detachably connected to the power supply interface 5, and the cable reel 3 is detachably mounted on the bulldozer assembly 1. For example, the power supply interface 5 is provided on the rear side of the cab.

[0045] In this embodiment, the excavator can switch between charging mode and towing mode. Specifically, in towing mode, the cable reel 3 is installed on the bulldozer assembly 1, and the second cable 4 is connected to the power supply interface 5. At this time, the power of the distribution device 12 is transmitted to the excavator's motor through the first cable 2, the cable reel 3, and the second cable 4, thereby powering the excavator's motor. In charging mode, the second cable 4 is removed from the power supply interface 5, and the cable reel 3 is removed from the bulldozer assembly 1. The charging cable is then used to connect the charger and the power supply interface 5 to charge the excavator's power battery.

[0046] That is, in this embodiment, by making the second cable 4 detachably connected to the power supply interface 5 and the cable reel 3 detachably connected to the bulldozer assembly 1 , the excavator can be freely switched between the charging working mode and the towing working mode.

[0047] In some embodiments provided herein, the power supply device further includes a charging gun 6 adapted to the power supply interface 5, and the second cable 4 is electrically connected to the power supply interface 5 via the charging gun 6. Specifically, the second cable 4 is electrically connected to the charging gun 6, and the charging gun 6 is detachably plugged into the power supply interface 5.

[0048] In this embodiment, the operator can directly hold the charging gun 6 to connect or disconnect the charging gun 6 from the power supply interface 5, which is faster and more convenient to use.

[0049] In some embodiments provided herein, the power supply device further comprises a bearing seat 7. The bearing seat 7 is connected to the cab 8 of the excavator, the second cable 4 is connected to the bearing seat 7, and the connection position between the second cable 4 and the bearing seat 7 is set between the two ends of the second cable 4.

[0050] As analyzed above, during the excavator's rotation operation, the cable reel 3 does not rotate with the excavator. Therefore, the excavator pulls on the second cable 4 when rotating. When the second cable 4 is subjected to tension, the connection structure between the second cable 4 and the power supply interface 5, that is, the charging gun 6 and the power supply interface 5, is easily damaged. In this embodiment, the bearing seat 7 is connected to a position between the two ends of the second cable 4. During the excavator's rotation, the force point of the second cable 4 is transferred to the connection between the bearing seat 7 and the second cable 4, rather than falling on the weak connection between the charging gun 6 and the charging interface. This reduces the force between the charging gun 6 and the power supply interface 5, thereby achieving the effect of protecting the charging gun 6 and the power supply interface 5.

[0051] 1 , optionally, the support base 7 includes a support rod around which the second cable 4 is wound. With this arrangement, the support base 7 has a simple structure, and the friction between the second cable 4 and the support rod can balance the tension on the second cable 4.

[0052] In some embodiments provided herein, the second cable 4 is detachably connected to the support base 7. With this arrangement, the second cable 4 can be removed from the support base 7 in the pure electric working mode.

[0053] As shown in FIG. 1 , optionally, the second cable 4 is detachably connected to the bearing bar via a fastener.

[0054] Specifically, the fastener includes a cable tie, a pipe clamp or a clamp. In this way, the fastener has a simple structure, low cost, and is easy to operate, thereby being able to conveniently fix the second cable 4 to the load-bearing rod or remove the second cable 4 from the load-bearing rod.

[0055] Optionally, the second cable 4 is wound around the load-bearing bar and then fixed by a fastener, thereby reducing the problem of the second cable 4 being loosened from the load-bearing bar and improving the connection strength between the second cable 4 and the load-bearing bar.

[0056] In some embodiments provided herein, the support base 7 is detachably connected to the cab 8. This arrangement allows the support base 7 to be removed from the cab 8 in pure electric operation, simplifying the excavator's structure and optimizing its overall weight. Alternatively, the support base 7 can be threadedly connected to the cab 8, connected to the cab 8 via threaded fasteners, or connected to the cab 8 via pipe clamps.

[0057] Optionally, the support base 7 is connected to the pillar 801 of the cab 8. Specifically, the support base 7 is arranged on the pillar 801 near the rear side of the cab 8, and the support base 7 extends toward the rear of the cab 8. The structure of the pillar 801 is simple, and there is no interference from other components behind the pillar 801. That is, the space behind the pillar 801 is open, which makes it easier to install the support base 7 and is less likely to cause interference with other components.

[0058] Referring to Figures 6 and 7, optionally, as another embodiment of the present application, the bearing seat 7 includes a main bracket 701, a main shaft 702 and a yaw bracket 703, the main bracket 701 is detachably connected to the cab 8, the main shaft 702 is fixedly connected to the main bracket 701, and the yaw bracket 703 is rotatably connected to the main shaft 702. Optionally, the main shaft 702 is arranged perpendicular to the main bracket 701; the yaw bracket 703 is a triangular bracket including a horizontal rod, a vertical rod and an oblique rod (see Figure 6), wherein the vertical rod of the triangular bracket is arranged parallel to the main shaft 702 and separated from the main shaft 702 by a certain distance, for example, the vertical rod can be connected to the main shaft 702 at its upper end and lower end respectively through a connecting plate, thereby realizing a rotatable connection with the center line of the main shaft 702 as the rotation axis, wherein, since the center line of the vertical rod of the triangular bracket is non-coaxial with the center line of the main shaft 702, a non-coaxial oscillating motion mode of the yaw bracket 703 is realized. The connecting plates located at the upper and lower ends of the vertical rod of the triangular bracket can be integrally formed with the triangular bracket (for example, as shown at the lower end of the vertical rod in Figure 6), or they can include separate structural components fixedly connected to the triangular bracket (for example, as shown at the upper end of the vertical rod in Figure 6).

[0059] Since the triangular bracket serving as the yaw bracket 703 can swing left and right around the main axis 702 in a non-coaxial swinging motion, the triangular bracket and the cab 8 can be protected from excessive force. Even if the excavator instantly pulls the second cable 4 with a large force when rotating left and right, the triangular bracket including the horizontal bar, vertical bar and diagonal bar has high stability and strong resistance to pulling, thereby effectively preventing the triangular bracket from being damaged and preventing the second cable 4 from being entangled on other structural components of the cab 8.

[0060] Optionally, the main bracket 701 may be connected to the cab 8 by threads, or connected to the cab 8 by a pipe clamp.

[0061] Optionally, the main bracket 701 is configured to be in an inverted U shape, and both ends of the main bracket 701 are detachably connected to the cab 8 via connecting seats 704 .

[0062] Specifically, the structure of the column 801 is simple, and there are no other components interfering behind the column 801. That is, the space behind the column 801 is wide open, making it easier to install the support base 7, and the support base 7 is less likely to interfere with other components. If the column 801 is connected to the cab 8 via screw fasteners, the two ends of the main bracket 701 can be connected to the threaded fasteners connected to the column 801 via the connecting base 704, and then connected to the column 801. In this way, the support base 7 can be connected to the original structure of the cab 8. When needed, the support base 7 can be connected, and when not needed, the support base 7 can also be uninstalled, allowing for flexible operation according to needs.

[0063] Optionally, the yaw bracket 703 is provided with a cable connection portion 7031, and the second cable 4 is detachably connected to the cable connection portion 7031. This arrangement allows the second cable 4 to be removed from the support base 7 in the pure electric operation mode; and the friction between the second cable 4 and the cable connection portion 7031 can balance the tension on the second cable 4.

[0064] Optionally, the second cable 4 is detachably connected to the cable connecting portion 7031 via a fastener or a bolt similar to the U-bolt 10 shown in Figure 4. This arrangement facilitates operation and can easily fix the second cable 4 to the cable connecting portion 7031 or remove the second cable 4 from the cable connecting portion 7031.

[0065] Optionally, after the second cable 4 is wrapped around the cable connection portion 7031 , it is fixed by a fastener or a U-bolt, thereby reducing the problem of the second cable 4 loosening from the cable connection portion 7031 and improving the connection strength between the second cable 4 and the cable connection portion 7031 .

[0066] Optionally, limit points (not shown in the figure) are respectively provided on both sides of the bottom of the main shaft 702 to limit the rotation of the yaw bracket 703 within a set range between the limit points.

[0067] The yaw bracket 703 can swing left and right around the main shaft 702 in a non-coaxial swinging motion, thereby preventing the second cable 4 from being subjected to excessive pulling force when the excavator rotates left and right. Limit points (not shown in the figure) are respectively set on both sides of the bottom of the main shaft 702 to limit the rotation of the yaw bracket 703 within the set range between the limit points. When the yaw bracket 703 swings to the limit point in any direction, the position of the limit point is the extreme position of the swing of the yaw bracket 703, thereby preventing the yaw bracket 703 from continuing to rotate, thereby protecting the yaw bracket 703 and preventing the yaw bracket 703 and the cab 8 from being subjected to excessive force when the yaw bracket 703 drags the second cable 4; and at the same time, the connection point between the second cable 4 and the yaw bracket 703 can be maintained at the cable connection part 7031 relatively far away from the cab 8 (see Figures 6-7), thereby more effectively preventing the second cable 4 from being entangled on other structural components of the cab 8 during operation.

[0068] In some embodiments provided herein, the power supply device further includes a mounting base 9, through which the cable reel 3 is connected to the bulldozer blade assembly 1. Because the mounting surfaces of the bulldozer blade assembly 1 and the cable reel 3 are both relatively small, directly connecting the cable reel 3 to the bulldozer blade assembly 1 is difficult and restricts the installation position of the cable reel 3. In this embodiment, the cable reel 3 is mounted to the bulldozer blade assembly 1 via the mounting base 9. The mounting base 9 is separately docked with the cable reel 3 and the bulldozer blade assembly 1. This reduces the issue of the cable reel 3's installation position being limited by the size of the bulldozer blade assembly 1's installation surface, allowing the cable reel 3 to be more conveniently installed on the bulldozer blade assembly 1.

[0069] In some embodiments provided herein, the mounting base 9 is detachably connected to the bulldozer blade assembly 1. With this arrangement, in pure electric operation mode, the mounting base 9 can be removed from the bulldozer blade assembly 1, thereby simplifying the structure of the bulldozer blade assembly 1, restoring all of its original functions, and reducing the weight of the bulldozer blade assembly 1.

[0070] In some embodiments provided herein, referring again to Figures 1 and 2 , the bulldozer blade assembly 1 includes a pair of booms 101 and a blade 102. The booms 101 are respectively connected to the blades 102, and the mounting bases 9 are respectively connected to the pair of booms 101. Since the booms 101 are generally columnar or rod-shaped, i.e., the structure of the booms 101 is relatively regular, connecting the mounting bases 9 to the booms 101 simplifies the connection structure between the mounting bases 9 and the booms 101.

[0071] As shown in Figures 4 and 5 , the power supply device optionally further includes a U-bolt 10 and a retaining nut. The U-bolt 10 is inserted into the arm 101 and configured to support the arm 101. Both ends of the U-bolt 10 extend through the mounting base 9 and threadably engage the retaining nut. This arrangement allows the mounting base 9 to be attached to the arm 101 without drilling holes in the arm 101, making it more convenient to use and remove.

[0072] Optionally, the mounting base 9 is provided with a connecting column 901, and the U-shaped bolt 10 is connected to the connecting column 901 via a fixing nut. Specifically, at least two connecting columns 901 are provided on both sides of the mounting base 9, and the connecting columns 901 on both sides of the mounting base 9 are respectively connected to the corresponding arm 101 via corresponding U-shaped bolts 10. Such an arrangement can improve the connection strength between the mounting base 9 and the arm 101.

[0073] Of course, the mounting base 9 is not limited to being connected to the arm 101 through the U-bolt 10. For example, the mounting base 9 can also be connected to the arm 101 through a bolt, that is, the bolt passes through the arm 101 and the mounting base 9 and connects the two.

[0074] In some embodiments provided in the present application, the mounting seat 9 is configured as a frame structure, which can reduce the weight of the mounting seat 9. Alternatively, the mounting seat 9 can be formed by welding profiles.

[0075] In some embodiments provided herein, the cable reel 3 is detachably connected to the mounting base 9. This arrangement allows the cable reel 3 to be replaced when a failure occurs. Alternatively, the cable reel 3 can be detachably connected to the mounting base 9 by bolts or cable ties.

[0076] An electric excavator is also provided in an embodiment of the present application.

[0077] Specifically, the electric excavator includes a bulldozer and the power supply device as described above.

[0078] It should be noted that the electric excavator includes a power supply device, which also includes all the above-mentioned advantages of the power supply device, which will not be repeated here.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A power supply device, characterized in that: Used to supply power to an excavator provided with a bulldozer assembly (1), comprising: A first cable (2), the first cable (2) being configured to be electrically connected to a power distribution device (12); a cable drum (3), the cable drum (3) being mounted on the bulldozer assembly (1), the cable drum (3) being provided with a cable introduction port and a cable outlet port, the cable introduction port being connected to the first cable (2), and the cable drum (3) being configured to retract and release the first cable (2); A second cable (4), two ends of which are respectively connected to the cable outlet port and the electrical appliances of the excavator.

2. The power supply device according to claim 1, characterized in that: The excavator is provided with a power supply interface (5) connected to the electrical appliance, the second cable (4) is detachably connected to the power supply interface (5), and the cable drum (3) is detachably mounted on the bulldozer assembly (1).

3. The power supply device according to claim 2, characterized in that: It also includes a charging gun (6) adapted to the power supply interface (5), and the second cable (4) is connected to the power supply interface (5) via the charging gun (6).

4. The power supply device according to claim 2, characterized in that: It also comprises a bearing seat (7), the bearing seat (7) being connected to the cab (8) of the excavator, the second cable (4) being connected to the bearing seat (7), and the connection position between the second cable (4) and the bearing seat (7) being arranged between the two ends of the second cable (4).

5. The power supply device according to claim 4, characterized in that: The bearing seat (7) is detachably connected to the cab (8), and / or the second cable (4) is detachably connected to the bearing seat (7).

6. The power supply device according to claim 5, characterized in that: The bearing seat (7) comprises a main support (701), a main shaft (702) and a yaw support (703); the main support (701) is detachably connected to the cab (8); the main shaft (702) is fixedly connected to the main support (701); and the yaw support (703) is rotatably connected to the main shaft (702).

7. The power supply device according to claim 6, characterized in that: The main support (701) is configured in an inverted U shape, and both ends of the main support (701) are detachably connected to the cab (8) via connection seats (704).

8. The power supply device according to claim 6, characterized in that: The deflection bracket (703) is provided with a cable connection portion (7031), and the second cable (4) is detachably connected to the cable connection portion (7031).

9. The power supply device according to claim 6, characterized in that: Limit points are respectively arranged on both sides of the bottom of the main shaft (702) to limit the rotation of the yaw bracket (703) within a set range between the limit points.

10. The power supply device according to any one of claims 1 to 9, characterized in that: It also comprises a mounting seat (9), and the cable drum (3) is connected to the bulldozer blade assembly (1) via the mounting seat (9).

11. The power supply device according to claim 10, characterized in that: The mounting seat (9) is detachably connected to the bulldozer assembly (1).

12. The power supply device according to claim 10, characterized in that: The bulldozer blade assembly (1) comprises a pair of arm frames (101) and a shovel plate (102), wherein the pair of arm frames (101) are both connected to the shovel plate (102), and the mounting seat (9) is connected to the pair of arm frames (101).

13. The power supply device according to claim 10, characterized in that: The mounting seat (9) is configured as a frame structure, and / or the cable reel (3) is detachably connected to the mounting seat (9).

14. An electric excavator, characterized in that: The invention comprises a bulldozer and a power supply device as claimed in any one of claims 1 to 13.

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