Battery quick-changing device and mining electric vehicle

Abstract

The invention provides a battery quick-changing device and a mining electric vehicle, the battery quick-changing device comprises a battery quick-changing support and a locking mechanism, the battery quick-changing support is used for fixing a battery box, the battery quick-changing support is provided with a matching structure, the locking mechanism is mounted on a frame structure of the mining electric vehicle, the locking mechanism comprises a locking part and a driving part, the locking part is matched with the matching structure, and the driving part is driven by the locking part to rotate. The locking part has a locking state and an avoiding state, the locking part fixes the battery quick-changing support to the frame structure in the locking state, the locking part avoids the battery quick-changing support in the avoiding state so that the battery quick-changing support can be separated from the frame structure, and the driving part is in driving connection with the locking part. Therefore, the locking part is driven to be switched into a locking state or an avoiding state. In the scheme, the battery quick-changing bracket can be conveniently fixed or disassembled, so that the time and tedious steps for changing the battery box are reduced, the operation difficulty is reduced, the downtime can be effectively reduced, the overall working efficiency is improved, and the applicability and the flexibility of the battery quick-changing device are also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mining vehicles, and in particular to a battery quick-change device and a mining electric vehicle. Background Art

[0002] With the development of electric vehicle technology and the increasing requirements for energy conservation and emission reduction in coal mines, mining electric vehicles with explosion-proof batteries as power sources have gradually replaced diesel engine explosion-proof trackless rubber-wheeled vehicles and are widely used in major mining areas. Mining electric vehicles do not require fuel during use, and only need to replace the battery to ensure normal operation. However, since electrical components such as motors and batteries need to be explosion-proof, the weight of the components after explosion-proof treatment is large, which makes the specific energy of explosion-proof batteries low and requires frequent battery replacement.

[0003] The battery quick-change mechanism in the existing technology is relatively complicated, and it is necessary to build a special battery quick-change station and match it with special large-scale precision automated lifting equipment. At the same time, the vehicle body must also be equipped with a precise and complex battery locking mechanism. These requirements are difficult to achieve in the complex and harsh conditions underground in coal mines. In addition, most coal mines are far away from the surface and underground, and it takes a long time to replace the battery during lifting. The battery quick-change mechanism of mining electric vehicles is complicated, and the battery replacement time is long, which leads to a decrease in the transportation efficiency of mining electric vehicles. Summary of the invention

[0004] The present invention provides a battery quick-change device and a mining electric vehicle to solve the problem of reduced transportation efficiency of mining electric vehicles caused by the complex battery quick-change mechanism and long battery replacement time in the prior art.

[0005] In order to solve the above-mentioned problem, according to one aspect of the present invention, the present invention provides a battery quick-change device, including a battery quick-change bracket and a locking mechanism, the battery quick-change bracket is used to fix the battery box, the battery quick-change bracket has a matching structure, the locking mechanism is installed on the frame structure of the mining electric vehicle, the locking mechanism includes a locking part and a driving part, the locking part and the matching structure cooperate, the locking part has a locking state and an avoidance state, in the locked state, the locking part fixes the battery quick-change bracket to the frame structure, in the avoidance state, the locking part avoids the battery quick-change bracket so that the battery quick-change bracket can be separated from the frame structure, and the driving part is drivingly connected to the locking part to drive the locking part to switch to the locked state or the avoidance state.

[0006] Furthermore, the mating structure has an elongated mating hole, and the locking portion includes a locking head, the shape of the locking head matches the mating hole, and when the battery quick-change bracket is located on the frame structure, the locking head passes through the mating hole and is located above the mating structure; wherein, the locking head is rotatably arranged, and in the locked state, the length direction of the locking head is perpendicular to the length direction of the mating hole, and the locking head presses the mating structure; in the avoidance state, the length direction of the locking head is the same as the length direction of the mating hole to avoid the mating structure.

[0007] Furthermore, the locking part also includes a connecting rod, the movement of the connecting rod is fixedly connected to the lock head, the other end of the connecting rod is hinged to the driving part, and the driving part drives the connecting rod to rotate to drive the lock head to rotate.

[0008] Furthermore, the driving part is a self-locking hydraulic cylinder.

[0009] Furthermore, the locking mechanism also includes a support, the support is fixed to the frame structure, and the support and the driving part are hinged.

[0010] Furthermore, the battery quick-change bracket has a plurality of matching structures distributed circumferentially, and there are a plurality of locking mechanisms, and the plurality of locking mechanisms and the plurality of matching structures are arranged in a one-to-one correspondence.

[0011] Furthermore, the battery quick-change device also includes a junction box, which is installed on a battery quick-change bracket or a battery box. After the battery quick-change bracket is installed on the frame structure, the junction box is located on the left and right directions of the mining electric vehicle. The junction box has a plug interface for connecting with the power cable of the mining electric vehicle.

[0012] Furthermore, a plurality of battery boxes are fixedly mounted on the battery quick-change bracket, and lugs and lifting seats are provided on the battery boxes. The lugs are used to connect adjacent battery boxes, and the lifting seats are used to connect lifting equipment.

[0013] According to another aspect of the present invention, there is provided an electric mining vehicle, which includes a frame structure and the above-mentioned battery quick-change device.

[0014] Furthermore, the frame structure includes a main frame and a sub-frame, the wheels are installed below the main frame, the sub-frame is fixed above the main frame, the locking mechanism in the battery quick-change device is installed on the sub-frame, and the locking mechanism fixes the battery quick-change bracket in the battery quick-change device to the sub-frame.

[0015] By applying the technical solution of the present invention, a battery quick-change device is provided, including a battery quick-change bracket and a locking mechanism. The battery quick-change bracket is used to fix the battery box. The battery quick-change bracket has a matching structure. The locking mechanism is installed on the frame structure of the mining electric vehicle. The locking mechanism includes a locking part and a driving part. The locking part and the matching structure cooperate. The locking part has a locking state and an avoidance state. In the locked state, the locking part fixes the battery quick-change bracket to the frame structure. In the avoidance state, the locking part avoids the battery quick-change bracket so that the battery quick-change bracket can be separated from the frame structure. The driving part is drivingly connected to the locking part to drive the locking part to switch to the locked state or the avoidance state.

[0016] In this solution, the battery quick-change bracket is used to fix the battery box, and has a matching structure, so that the battery quick-change mechanism can be quickly and stably fixed on the frame structure. Through the locking part and the matching structure of the locking mechanism, the driving part drives the locking part to switch between the locking state and the avoidance state, so that the locking part can lock the battery quick-change bracket on the frame structure, or separate the battery quick-change bracket from the frame structure, so that the operator can easily fix or remove the battery quick-change bracket, reducing the time and cumbersome steps for replacing the battery quick-change bracket, without complex tools and cumbersome manual locking process, reducing the difficulty of operation, can effectively reduce downtime, improve overall work efficiency, and also improve the applicability and flexibility of the battery quick-change device. Moreover, the locking part can firmly fix the battery quick-change bracket on the frame structure in the locked state, preventing the battery box from being displaced or falling off due to vibration or other factors during the operation of the vehicle body, preventing the battery box from colliding or being damaged, extending the service life of the battery and the equipment, and avoiding safety accidents caused by the battery box falling off or loosening, thereby improving the safety and stability of the battery box installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram showing the structure of a battery quick-change device provided by an embodiment of the present invention is shown;

[0019] Figure 2 A schematic structural diagram of a frame of a battery quick-change device provided by an embodiment of the present invention is shown;

[0020] Figure 3 A schematic structural diagram showing a locking mechanism of a battery quick-change device provided by an embodiment of the present invention in an avoidance state;

[0021] Figure 4 A schematic structural diagram showing a locking mechanism of a battery quick-change device provided by an embodiment of the present invention in a locked state;

[0022] Figure 5 The schematic diagram of the structure of the electric mining vehicle provided by the embodiment of the present invention is shown.

[0023] The above drawings include the following reference numerals:

[0024] 10. Battery quick-change bracket;

[0025] 20. Locking mechanism; 21. Locking head; 22. Connecting rod; 23. Driving unit; 24. Support;

[0026] 30. Battery box; 31. Lifting seat;

[0027] 40. Main frame;

[0028] 50. Subframe;

[0029] 60. Wheel;

[0030] 70. Coordinate structure. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 4 As shown, an embodiment of the present invention provides a battery quick-change device, including a battery quick-change bracket 10 and a locking mechanism 20. The battery quick-change bracket 10 is used to fix the battery box 30. The battery quick-change bracket 10 has a matching structure 70. The locking mechanism 20 is installed on the frame structure of the mining electric vehicle. The locking mechanism 20 includes a locking part and a driving part 23. The locking part and the matching structure 70 cooperate. The locking part has a locking state and an avoidance state. In the locked state, the locking part fixes the battery quick-change bracket 10 to the frame structure. In the avoidance state, the locking part avoids the battery quick-change bracket 10 so that the battery quick-change bracket 10 can be separated from the frame structure. The driving part 23 is connected to the locking part to drive the locking part to switch to the locking state or the avoidance state.

[0033] In this embodiment, the battery quick-change bracket 10 is used to fix the battery box 30, and has a matching structure 70, so that the battery quick-change bracket 10 can be quickly and stably fixed on the frame structure. Through the cooperation between the locking part of the locking mechanism 20 and the matching structure 70, the driving part 23 drives the locking part to switch between the locking state and the avoidance state, so that the locking part can lock the battery quick-change bracket 10 on the frame structure, or separate the battery quick-change bracket 10 from the frame structure, so that the operator can easily fix or remove the battery quick-change bracket 10, reducing the time and cumbersome steps for replacing the battery quick-change bracket 10, without the need for complex tools and cumbersome manual locking process, reducing the difficulty of operation, can effectively reduce downtime, improve overall work efficiency, and also improve the applicability and flexibility of the battery quick-change device. Moreover, when the locking part is in the locked state, the battery quick-change bracket 10 can be firmly fixed to the frame structure, preventing the battery box 30 from being displaced or falling off due to vibration or other factors during the operation of the vehicle body, preventing the battery box 30 from being collided or damaged, extending the service life of the battery and equipment, and avoiding safety accidents caused by the battery box 30 falling off or loosening, thereby improving the safety and stability of the installation of the battery box 30.

[0034] like Figures 2 to 4 As shown, the matching structure 70 has a long matching hole, and the locking part includes a locking head 21. The shape of the locking head 21 matches the matching hole. When the battery quick-change bracket 10 is located on the frame structure, the locking head 21 passes through the matching hole and is located above the matching structure 70; wherein, the locking head 21 is rotatably arranged, and in the locked state, the length direction of the locking head 21 is perpendicular to the length direction of the matching hole, and the locking head 21 presses the matching structure 70; in the avoidance state, the length direction of the locking head 21 is the same as the length direction of the matching hole to avoid the matching structure 70.

[0035] In this embodiment, through the cooperation of the lock head 21 and the long strip matching hole, the locking part can achieve rapid locking or avoidance by rotating the lock head 21 when the battery quick-change bracket 10 is installed on the frame structure, ensuring that the battery quick-change bracket 10 can be accurately docked each time it is installed, avoiding errors during docking, and ensuring the stability and safety of the battery box 30. The matching of the lock head 21 and the matching hole makes the locking process more accurate and simple. The lock head 21 achieves locking or avoidance by rotation, which can quickly and easily complete the fixation and avoidance of the battery quick-change bracket 10, reducing the complexity of manual operation, especially in an environment where frequent battery replacement is required, which can significantly improve work efficiency. In the locked state, the length direction of the lock head 21 is perpendicular to the length direction of the matching hole, pressing the matching structure 70. This locking method can ensure that the battery quick-change bracket 10 is firmly fixed on the frame structure, prevent the battery box 30 from being displaced during driving, and increase the stability and safety of the installation of the battery box 30. Moreover, the rotatable lock head 21 has a simple structure and can reduce unnecessary parts, making the overall structure more compact, which not only saves space but also improves the structural stability of the device and ensures the firmness of the battery box 30 after installation.

[0036] like Figure 3 and Figure 4 As shown, the locking part also includes a connecting rod 22, the movement of the connecting rod 22 is fixedly connected to the lock head 21, and the other end of the connecting rod 22 is hinged to the driving part 23, and the driving part 23 drives the connecting rod 22 to rotate, thereby driving the lock head 21 to rotate.

[0037] In this embodiment, the connecting rod 22 is driven to rotate by the driving unit 23, thereby driving the lock head 21 to rotate, simplifying the operation steps during the replacement of the battery box 30. The operator no longer needs to manually rotate the lock head 21, but controls the connecting rod through the driving unit 23 to complete the locking or releasing, so that the lock head 21 can be quickly and accurately rotated to a locked state or an avoidance state, reducing manual operations and cumbersome steps. Moreover, since the driving unit 23 controls the rotation of the connecting rod, the rotation of the lock head 21 is not subject to human interference, and the locking or releasing can be completed more smoothly and accurately, avoiding the situation where the lock head 21 is not completely locked or released due to fatigue or operating errors of the operator, thereby ensuring the stability of the battery quick-change bracket 10 on the frame structure.

[0038] The driving part 23 is a self-locking hydraulic cylinder.

[0039] In this embodiment, due to the self-locking characteristics of the self-locking hydraulic cylinder, when the battery is installed or removed, the hydraulic cylinder will ensure that the lock head 21 is always kept in the correct locking state, avoiding the risk of the locking part loosening due to hydraulic oil leakage or other reasons. Even if the power is interrupted or there is a problem with the control system, the self-locking hydraulic cylinder can maintain the locked state, preventing the lock head 21 from accidentally loosening or failing, and locking the battery quick-change bracket 10 to the frame structure, thereby improving the safety of the device. In addition, the self-locking hydraulic cylinder can ensure that the lock head 21 can be accurately rotated to the required position during each operation, avoiding the inaccurate rotation of the lock head 21 due to improper operation or error.

[0040] like Figure 3 and Figure 4 As shown, the locking mechanism 20 further includes a support 24 , which is fixed to the frame structure, and the support 24 and the driving portion 23 are hinged.

[0041] In this embodiment, the support 24 fixedly connects the driving part 23 and the frame structure to form a more stable support point, so that the entire locking mechanism 20 can be more stable and reliable during operation. The support 24 can also effectively disperse the impact force and vibration generated during the operation process, avoiding the loosening or dislocation of the locking mechanism 20 caused by vibration, thereby ensuring the stability of the locking part during operation.

[0042] Furthermore, a plurality of matching structures 70 are distributed circumferentially of the battery quick-change bracket 10 , and there are a plurality of locking mechanisms 20 , and the plurality of locking mechanisms 20 and the plurality of matching structures 70 are arranged in a one-to-one correspondence.

[0043] In this embodiment, by providing a plurality of locking mechanisms 20 corresponding to a plurality of matching structures 70, each matching structure 70 and the corresponding locking mechanism 20 work together to ensure that the battery quick-change bracket 10 can be more firmly fixed when installed on the frame structure. The plurality of locking mechanisms 20 can share the weight and external forces of the battery quick-change bracket 10, avoid failure of a single locking mechanism 20 due to overload or uneven force, and effectively reduce the wear of each single locking mechanism 20, thereby extending the service life of the device.

[0044] Furthermore, the battery quick-change device also includes a junction box, which is installed on the battery quick-change bracket 10 or the battery box 30. After the battery quick-change bracket 10 is installed on the frame structure, the junction box is located on the left and right directions of the mining electric vehicle. The junction box has a plug interface for connecting with the power cable of the mining electric vehicle.

[0045] In this embodiment, the provision of the junction box simplifies the process of electrical connection when the battery box 30 is replaced. By providing a plug interface, only a simple plug-in and pull-out operation is required, and the operator can very conveniently and quickly connect the electrical connection of the battery box 30 to the power cable of the mining electric vehicle, avoiding cumbersome cable connection operations, reducing operation time, and improving work efficiency. Moreover, the provision of the junction box can also effectively avoid problems such as poor electrical contact and short circuit that may occur during the installation and removal of the battery box 30. The junction box provides a safe and reliable connection point to ensure the safety of the electrical system when the battery box 30 is replaced.

[0046] Specifically, a plurality of battery boxes 30 are fixedly mounted on the battery quick-change bracket 10 , and a lug and a lifting seat 31 are provided on the battery box 30 . The lug is used to connect adjacent battery boxes 30 , and the lifting seat 31 is used to connect a lifting device.

[0047] In this embodiment, by providing lugs on the battery box 30, adjacent battery boxes 30 can be conveniently connected to form a stable battery pack structure, which can ensure stable connection between multiple battery boxes 30 and avoid relative movement or separation between battery boxes 30 during replacement and operation. The connection of multiple battery boxes 30 allows the battery box 30 to be moved and replaced as a whole when replaced, avoiding the complicated process of disassembling and installing the battery box 30 one by one, saving time and improving the efficiency of the battery box 30 replacement process. In addition, the setting of the lifting seat 31 facilitates the lifting and transportation of the battery box 30, so that the battery box 30 can be quickly and conveniently transported by the lifting equipment, reducing the cumbersome steps of manual transportation.

[0048] An embodiment of the present invention further provides an electric mining vehicle, comprising a frame structure and the above-mentioned battery quick-change device.

[0049] In this embodiment, the battery replacement frequency of the mining electric vehicle is high, especially in the case of long-term operation or high-load operation, the battery consumption is fast. The design of the battery quick-change device makes the replacement of the battery box 30 easier and faster, reduces downtime, and improves work efficiency. Through the battery quick-change bracket 10 and the locking mechanism 20 and the matching structure 70, as well as the setting of the junction box, the replacement of the battery box 30 can be completed in a very short time. The operator only needs to perform simple operations to disassemble or replace the battery box 30, avoiding the cumbersome process of a large amount of manual wiring or disassembly of the battery box 30 during traditional battery replacement, thereby improving work efficiency.

[0050] like Figure 5As shown, the frame structure includes a main frame 40 and a sub-frame 50, a wheel 60 is installed below the main frame 40, and the sub-frame 50 is fixed above the main frame 40, and the locking mechanism 20 in the battery quick-change device is installed on the sub-frame 50, and the locking mechanism 20 fixes the battery quick-change bracket 10 in the battery quick-change device to the sub-frame 50.

[0051] In this embodiment, the sub-frame 50 is used to bear the weight of the battery quick-change device. By installing the locking mechanism 20 on the sub-frame 50, the battery quick-change bracket 10 is firmly fixed on the sub-frame 50, ensuring that the battery box 30 will not loosen or shift due to vibration or external force during the operation of the electric vehicle. In addition, by fixing the sub-frame 50 on the main frame 40 and installing the locking mechanism 20 on the sub-frame 50, the battery quick-change bracket 10 is restricted in the middle together with the sub-frame 50 through the lock head 21, and the freedom of the battery quick-change bracket 10 in three directions is jointly restricted to realize the locking function, so that the weight distribution of the battery quick-change device can be more even, reducing the pressure on the main frame 40, helping to improve the bearing capacity and stability of the overall structure, thereby extending the service life of the frame structure.

[0052] The battery quick-change device and mining electric vehicle in the present application realize the rapid replacement of the battery box 30 of the mining electric vehicle through the use of the locking mechanism 20 and the battery quick-change bracket 10, thereby improving the use efficiency and maintenance convenience of the mining electric vehicle. The precise matching of the lock head 21 and the matching hole ensures the stability of the battery box 30 during the driving process of the vehicle, and the use of the self-locking hydraulic cylinder makes the unlocking process simpler and faster. The setting of the junction box further simplifies the electrical connection process, provides a guarantee for the efficient operation of the mining electric vehicle, and also fully considers the special needs of the mining environment, improving the practicality of the device.

[0053] The above is only an optional embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0055] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of this solution. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0056] In the description of this scheme, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing this scheme and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the scope of protection of this scheme; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this scheme.

Claims

1. A battery quick-change device, characterized in that: The invention comprises a battery quick-change bracket (10) and a locking mechanism (20), wherein the battery quick-change bracket (10) is used to fix a battery box (30), the battery quick-change bracket (10) has a matching structure (70), the locking mechanism (20) is installed on the frame structure of a mining electric vehicle, the locking mechanism (20) comprises a locking part and a driving part (23), the locking part and the matching structure (70) cooperate, the locking part has a locking state and an avoidance state, in the locking state the locking part fixes the battery quick-change bracket (10) to the frame structure, in the avoidance state the locking part avoids the battery quick-change bracket (10) so that the battery quick-change bracket (10) can be separated from the frame structure, and the driving part (23) is drivingly connected to the locking part to drive the locking part to switch to the locking state or the avoidance state.

2. The battery quick-change device according to claim 1, characterized in that: The matching structure (70) is provided with a long matching hole, and the locking portion includes a locking head (21). The shape of the locking head (21) matches the matching hole. When the battery quick-change bracket (10) is located on the frame structure, the locking head (21) passes through the matching hole and is located above the matching structure (70); wherein the locking head (21) is rotatably arranged, and in the locked state, the length direction of the locking head (21) is perpendicular to the length direction of the matching hole, and the locking head (21) presses the matching structure (70); in the avoidance state, the length direction of the locking head (21) is the same as the length direction of the matching hole, so as to avoid the matching structure (70).

3. The battery quick-change device according to claim 2, characterized in that: The locking portion further comprises a connecting rod (22), the movement of the connecting rod (22) is fixedly connected to the locking head (21), the other end of the connecting rod (22) is hinged to the driving portion (23), and the driving portion (23) drives the connecting rod (22) to rotate, thereby driving the locking head (21) to rotate.

4. The battery quick-change device according to claim 2, characterized in that: The driving part (23) is a self-locking hydraulic cylinder.

5. The battery quick-change device according to claim 4, characterized in that: The locking mechanism (20) further comprises a support (24), wherein the support (24) is fixed to the frame structure, and the support (24) and the driving part (23) are hingedly connected.

6. The battery quick-change device according to claim 1, characterized in that: The battery quick-change bracket (10) has a plurality of matching structures (70) distributed in the circumferential direction, and the locking mechanisms (20) are multiple, and the multiple locking mechanisms (20) and the multiple matching structures (70) are arranged in a one-to-one correspondence.

7. The battery quick-change device according to claim 1, characterized in that: The battery quick-change device further comprises a junction box, which is mounted on the battery quick-change bracket (10) or the battery box (30). After the battery quick-change bracket (10) is mounted on the frame structure, the junction box is located in the left and right directions of the mining electric vehicle, and the junction box has a plug interface for plugging with a power cable of the mining electric vehicle.

8. The battery quick-change device according to claim 1, characterized in that: A plurality of battery boxes (30) are fixedly mounted on the battery quick-change bracket (10), and the battery boxes (30) are provided with lugs and a hanging seat (31), wherein the lugs are used to connect adjacent battery boxes (30), and the hanging seat (31) is used to connect a hanging device.

9. A mining electric vehicle, characterized in that: The mining electric vehicle comprises a frame structure and a battery quick-change device according to any one of claims 1 to 8.

10. The mining electric vehicle according to claim 9, characterized in that: The frame structure comprises a main frame (40) and a sub-frame (50); a wheel (60) is installed below the main frame (40); the sub-frame (50) is fixed above the main frame (40); a locking mechanism (20) in the battery quick-change device is installed on the sub-frame (50); and the locking mechanism (20) fixes a battery quick-change bracket (10) in the battery quick-change device to the sub-frame (50).

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