Power supply device and power supply system

Abstract

The present application belongs to the technical field of power supply equipment, and provides a power supply device and a power supply system, which mainly include a conductive contact part, a device body and a drive assembly; the device body includes a storage state and an extended state, and the conductive contact part is arranged on the device body; the device body is provided with a first state maintaining mechanism and a second state maintaining mechanism, the first state maintaining mechanism is used to maintain the waiting state of the conductive contact part during the state switching of the device body, and the second state maintaining mechanism is used to maintain the position height of the conductive contact part during the state switching of the device body; the drive assembly is connected to the device body in a transmission manner. The device body in this solution includes a storage state and an extended state, which can avoid the problem of wire invasion, and is provided with a first state maintaining mechanism and a second state maintaining mechanism, which can improve the reliability of the device, and the overall structure is simple and the design is ingenious.

Description

Technical Field

[0001] The present application belongs to the technical field of power supply equipment, and specifically relates to a power supply device and a power supply system. Background Art

[0002] At present, in the scenario of molten iron transportation, there is a need to charge the molten iron transport tank trucks; usually, a charging pile is set up at a fixed position on the ground. When the tank truck needs to be charged, the tank truck is driven to the designated position, and the power receiving area on the tank truck is contacted and connected with the charging pile to realize the charging operation.

[0003] Existing charging stations are primarily categorized as sliding-contact and telescopic. In the traditional sliding-contact solution, the charging area on the tank truck is fixed and immovable, requiring the ground-based charging station to move and deform to achieve electrical connectivity. However, this approach typically requires the charging area of ​​the charging station to extend beyond the vehicle's maximum profile, posing a risk of exceeding vehicle limits. The telescopic solution, on the other hand, primarily utilizes direct-acting extension and retraction, often using a screw drive. This results in slower response times and lower utilization of ground space, making it unsuitable for scenarios requiring specific space. Summary of the Invention

[0004] In order to overcome at least one of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a power supply device and a power supply system.

[0005] The technical means adopted by this application to solve the above technical problems are:

[0006] This application provides a power supply device, comprising:

[0007] conductive contact portion;

[0008] The device body includes a retracted state and an extended state, and the conductive contact portion is provided on the device body; the device body is provided with a first state maintaining mechanism and a second state maintaining mechanism, the first state maintaining mechanism is used to maintain the ready-to-attach state of the conductive contact portion during the state switching of the device body, and the second state maintaining mechanism is used to maintain the position height of the conductive contact portion during the state switching of the device body;

[0009] A driving assembly is in transmission connection with the device body.

[0010] Preferably, the device body includes an active arm, the middle part of the active arm is hinged and fixed, the driving assembly is connected to the bottom end of the active arm, and the conductive contact part is connected to the top end of the active arm.

[0011] In the above preferred solution, the middle part of the active arm is set to be hinged and fixed, and then the driving component is set at the bottom end of the active arm, and the conductive contact part is set at the top end of the active arm; at this time, the operation of the driving component can drive the active arm to swing, and the swinging movement of the active arm can realize the switching of the device body between the storage state and the extended state, and the use of the swinging movement can have a faster response speed.

[0012] Preferably, the driving assembly includes a sliding plate, and the sliding plate is provided with a first guide column;

[0013] A first strip-shaped guide portion is provided at the bottom end of the active arm, and the first guide column is extended into the first strip-shaped guide portion to form a transmission connection.

[0014] In the above preferred embodiment, the first guide column can be used to form a transmission cooperation with the first strip guide portion. For example, the sliding movement of the sliding plate can drive the first guide column to move, and the position change of the first guide column in the first strip guide portion can drive the active arm to swing.

[0015] Preferably, the driving assembly further comprises a driving motor, a driving gear is provided on the rotating shaft of the driving motor, a transmission rack is provided on the sliding plate, and the driving gear is meshedly connected with the transmission rack;

[0016] Alternatively, the driving assembly further comprises a telescopic cylinder, a movable end of the telescopic cylinder being connected to the sliding plate.

[0017] In the above preferred solution, the power source of the sliding plate can be set to be in the form of being driven by a driving motor for rotation, or can be set to be in the form of being extended and retracted by a telescopic cylinder to drive the sliding plate to slide.

[0018] Preferably, a mounting plate is hingedly provided at the top end of the active arm, and the conductive contact portion includes a bottom plate, which is provided on the mounting plate and can slide up and down relative to the mounting plate.

[0019] In the above preferred solution, the installation plate is provided to facilitate the pre-installation of the base plate; at the same time, the base plate and the installation plate are arranged to be able to slide up and down relative to each other, so that the base plate can have a structural basis for changing its position up and down.

[0020] Preferably, the first state maintaining mechanism includes a first holding arm and a synchronization arm;

[0021] The middle portion of the first retaining arm is hinged to the active arm, a second strip-shaped guide portion is provided on the mounting plate, a guide rod is provided on the front end of the first retaining arm, and the guide rod extends into the second strip-shaped guide portion;

[0022] The synchronization arm is arranged in parallel with the active arm, one end of the synchronization arm is hinged to the rear end of the first retaining arm, and a first connecting arm is hinged between the other end of the synchronization arm and the active arm.

[0023] In the above preferred solution, by providing the first retaining arm and the synchronization arm, the device body can maintain the state of the mounting plate to be bonded when switching states, thereby facilitating subsequent conductive bonding operations.

[0024] Preferably, the device body further includes a reinforcing arm, which is arranged parallel to the active arm, one end of the reinforcing arm is hinged to the synchronization arm, and a second connecting arm is hinged between the other end of the reinforcing arm and the active arm.

[0025] In the above preferred solution, the provision of the reinforcing arm can facilitate the improvement of the reliability and stability of the active arm and the first state maintaining mechanism during use, thereby improving the application effect of the power supply device.

[0026] Preferably, the second state maintaining mechanism includes a second holding arm, and the second holding arm is provided with a third strip-shaped guide portion and a fourth strip-shaped guide portion;

[0027] The rear end of the second retaining arm is hinged to the mounting plate, and the guide rod extends into the third strip-shaped guide portion to form a transmission connection;

[0028] A second guide column is provided on the bottom plate, and the second guide column extends into the fourth strip-shaped guide portion to form a transmission connection.

[0029] In the above preferred solution, the second retaining arm is set up to realize linkage with the action of the first retaining arm, so that when the state of the device body is switched, the waiting state of the mounting plate and the vertical position height of the base plate can be maintained synchronously.

[0030] Preferably, the conductive contact portion further includes an electrode, the electrode is arranged on the outside of the bottom plate, and an elastic buffer is provided between the electrode and the bottom plate.

[0031] In the above preferred solution, by arranging the elastic buffer between the electrode and the base plate, the electrode can have a certain buffering effect when conducting contact, thereby avoiding damage to the device caused by rigid contact.

[0032] The present application also provides a power supply system, comprising an electrical device and the power supply device as described above;

[0033] The electrical device is provided with a power receiving portion, and the conductive contact portion can move to contact with the power receiving portion and be electrically connected thereto.

[0034] Compared with the prior art, the present invention has at least the following beneficial effects:

[0035] In this solution, the device body is configured to include a retracted state and an extended state, which can avoid the problem of wire invasion. At the same time, a first state maintaining mechanism and a second state maintaining mechanism are provided on the device body, and a driving component is provided to drive the device body to switch between the retracted state and the extended state. The overall structure is simple and the design is ingenious.

[0036] At the same time, by switching between the retracted state and the extended state, the conductive contact part can be driven to change its position to achieve the conduction of the conductive contact or the separation of the conductive contact; and the first state maintaining mechanism provided can maintain the waiting state of the conductive contact part when the state is switched, so as to improve the fitting reliability of the conductive contact part when making conductive contact; and the second state maintaining mechanism provided can be used to maintain the position height of the conductive contact part when the state is switched, thereby further improving the fitting reliability of the conductive contact part when making conductive contact, and improving the use effect and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 This is a schematic diagram of the structure of the power supply device in this application.

[0039] Figure 2 A schematic diagram comparing the state switching of the power supply device in this application.

[0040] Figure 3 This is a schematic diagram of the structure of the drive component in this application.

[0041] Figure 4 This is a schematic structural diagram of the device body in this application.

[0042] Figure 5 Schematic diagram of the structure of the conductive contact part in this application.

[0043] Figure 6 This is a schematic diagram comparing the space occupied by the power supply device in this application and a conventional charging pile.

[0044] Marking Description:

[0045] 1-conductive contact part, 11-bottom plate, 111-slide groove, 112-second guide post, 12-electrode, 13-elastic buffer;

[0046] 2 - device body, 21 - active arm, 211 - first strip guide, 22 - mounting plate, 221 - slide rail, 222 - second strip guide, 23 - first retaining arm, 231 - guide rod, 24 - synchronization arm, 25 - first connecting arm, 26 - reinforcement arm, 27 - second connecting arm, 28 - second retaining arm, 281 - third strip guide, 282 - fourth strip guide;

[0047] 3-driving assembly, 31-sliding plate, 311-first guide column, 312-transmission rack, 32-driving motor, 321-driving gear;

[0048] 4-Charging station. DETAILED DESCRIPTION

[0049] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention. The embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention.

[0050] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. Similar reference numerals and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. At the same time, in the description of this application, the terms "first", "second", etc. are used only to distinguish descriptions and are not to be understood as indicating or implying relative importance.

[0051] Charging stations currently in use are primarily categorized as sliding-contact and telescopic. For the sliding-contact type, the charging area of ​​the ground-mounted charging station is typically extended beyond the vehicle's maximum profile. Relative movement between the electrical equipment and the charging station compresses the charging area, achieving electrical connectivity. However, this method poses the risk of the charging area exceeding the vehicle's limits, a practice that is increasingly inconsistent with design and application specifications. Traditional telescopic types utilize a screw-driven mechanism for direct extension and retraction, taking up considerable space and exhibiting slow response times. Consequently, both current application methods present inconveniences.

[0052] In this regard, a power supply device is provided in this embodiment. The power supply device has two application states in application, including a storage state and an extended state. Figure 2 As shown, this can effectively avoid the problem of line encroachment caused by the charging part exceeding the vehicle limit, thereby improving application reliability. At the same time, the power supply device in this embodiment can also achieve faster state switching to improve action response speed and user experience.

[0053] like Figure 1-6 As shown, this embodiment provides a power supply device, which mainly includes a conductive contact portion 1, a device body 2, and a drive assembly 3. The conductive contact portion 1 is mainly used to contact and electrically connect with external electrical equipment, thereby providing power; the conductive contact portion 1 is provided on the device body 2, and the device body 2 is transmission-connected to the drive assembly 3, so that the operation of the drive assembly 3 drives the device body 2 to switch between the retracted state and the extended state.

[0054] In some embodiments, the retracted state can be preliminarily understood as the transition of the conductive contact portion 1 from the conductive contact state to the contact separation state, and the extended state can be preliminarily understood as the transition of the conductive contact portion 1 from the contact separation state to the conductive contact state.

[0055] In some embodiments, the conductive contact portion 1 may include a base plate 11 and an electrode 12. The electrode 12 is disposed on an outer surface of the base plate 11 to achieve contact with an external power receiving structure.

[0056] In some embodiments, the electrodes 12 are provided in two groups to correspond to the positive output and the negative output of the power supply circuit respectively.

[0057] In some embodiments, an elastic buffer 13, such as a spring, is further provided between the electrode 12 and the base plate 11. The elastic buffer 13 provides a certain buffering effect when the electrode 12 makes conductive contact, thereby avoiding damage to the device caused by rigid contact between the electrode 12 and the external power-receiving structure, thereby extending the service life of the device.

[0058] Furthermore, in order to improve the use effect of the power supply device, in this embodiment, a first state maintaining mechanism and a second state maintaining mechanism are provided on the device body 2, wherein the first state maintaining mechanism is used to maintain the waiting state of the conductive contact part 1 during the state switching of the device body 2, and the second state maintaining mechanism is used to maintain the position height of the conductive contact part 1 during the state switching of the device body 2.

[0059] In some embodiments, the conductive contact portion 1 is set in a vertical state as an example. At this time, the base plate 11 is set vertically, and the outer side surface of the electrode 12 used for conductive contact is also set vertically; and under the action of the first state maintaining mechanism, when the device body 2 switches between the storage state and the extended state, the conductive contact portion 1 can remain in a relatively vertical state, so as to ensure the subsequent conductive contact effect with the external power receiving structure.

[0060] In some embodiments, according to actual conductive contact design requirements, for example, when the surface of the external power-receiving structure is inclined at a certain amplitude, the outer surface of the electrode 12 also needs to be inclined at a certain amplitude; and the first state maintaining mechanism can still play a role in maintaining the state of the conductive contact part 1 to be bonded.

[0061] In some embodiments, the state to be bonded referred to herein can be understood as the state of the conductive contact portion 1 before achieving conductive contact with the external power receiving structure or after the contact is separated.

[0062] As an example of one application, in this embodiment, the device body 2 includes an active arm 21, the middle portion of which is fixed via a hinge, allowing the active arm 21 to swing. In this case, the drive assembly 3 is disposed at the bottom end of the active arm 21 and is in transmission connection with the active arm 21. The operation of the drive assembly 3 drives the active arm 21 to swing, thereby achieving the switching of the device body 2 between the stowed state and the extended state. The use of a swinging motion can achieve a faster response speed.

[0063] In some embodiments, the driving assembly 3 includes a sliding plate 31 and a power source for driving the sliding plate 31 to perform sliding motion; wherein, a first guide column 311 is provided on the sliding plate 31, and a first strip guide portion 211 is provided at the bottom end of the active arm 21, and the first guide column 311 extends into the first strip guide portion 211 and forms a transmission connection.

[0064] In some embodiments, the first strip guide portion 211 can be set to a strip groove or strip hole structure; the first guide column 311 is extended into the first strip guide portion 211, and when the sliding plate 31 slides, it will drive the first guide column 311 to move. At this time, the outer peripheral surface of the first guide column 311 will press against the inner surface of the first strip guide portion 211, thereby forming a transmission cooperation to drive the active arm 21 to swing.

[0065] In some embodiments, the power source can be a drive motor 32. For example, a drive gear 321 is provided on the rotating shaft of the drive motor 32, and a transmission rack 312 is provided on the sliding plate 31, with the drive gear 321 being meshed with the transmission rack 312. By controlling the rotation of the drive motor 32, the sliding plate 31 is driven to slide, thereby driving the active arm 21 to swing.

[0066] In some embodiments, the power source can be in the form of a telescopic cylinder; for example, the sliding plate 31 is connected to the movable end of the telescopic cylinder, and then the telescopic movement of the telescopic cylinder is controlled to drive the sliding movement of the sliding plate 31, thereby controlling the swinging movement of the active arm 21.

[0067] In addition, as one application example, in this embodiment, a mounting plate 22 is hingedly provided at the top end of the active arm 21, the bottom plate 11 is provided on the outer surface of the mounting plate 22, and the bottom plate 11 can slide up and down relative to the mounting plate 22.

[0068] In some embodiments, the mounting plate 22 and the base plate 11 are arranged parallel to each other; at the same time, a slide rail mechanism is also provided between the mounting plate 22 and the base plate 11. The slide rail mechanism includes a slide rail 221 and a slide groove 111, wherein the cross-sectional shape of the slide rail 221 is L-shaped or T-shaped, and the cross-sectional shape of the slide groove 111 is adapted to the cross-sectional shape of the slide rail 221, and the slide groove 111 is nested on the slide rail 221. In this case, relative sliding can be achieved between the base plate 11 and the mounting plate 22, and accidental separation between the base plate 11 and the mounting plate 22 along the normal direction can be avoided.

[0069] In some embodiments, the slide rail 221 is disposed on the mounting plate 22 , and the slide groove 111 is disposed on the bottom plate 11 .

[0070] In some embodiments, the slide rail 221 is disposed on the base plate 11 , and the slide groove 111 is disposed on the mounting plate 22 .

[0071] The mounting plate 22 facilitates pre-installation of the base plate 11. Furthermore, the base plate 11 and the mounting plate 22 are configured to slide relative to each other, providing a structural foundation for the base plate 11 to move up and down. The conductive contact portion 1 is then connected to the top of the active arm 21.

[0072] As an example of one application, in this embodiment, the first state maintaining mechanism includes a first retaining arm 23 and a synchronization arm 24. The middle portion of the first retaining arm 23 is hinged to the active arm 21, and the hinged position is located below the hinged position between the active arm 21 and the mounting plate 22. A second strip-shaped guide portion 222 is provided on the mounting plate 22, and a guide rod 231 is provided at the front end of the first retaining arm 23, extending into the second strip-shaped guide portion 222.

[0073] In some embodiments, the second strip-shaped guide portion 222 can be configured as a strip-shaped groove or a strip-shaped hole.

[0074] In some embodiments, the second strip-shaped guide portion 222 is provided on both sides of the mounting plate 22. At this time, both ends of the guide rod 2321 extend into the second strip-shaped guide portion 222 provided on both sides to improve the force balance.

[0075] Furthermore, the synchronization arm 24 is arranged parallel to the active arm 21. One end of the synchronization arm 24 is hinged to the rear end of the first retaining arm 23, and the other end of the synchronization arm 24 is hinged to the active arm 21 via a first connecting arm 25. Thus, a shape-adjustable parallelogram structure is formed between the active arm 21, the first retaining arm 23, the synchronization arm 24, and the first connecting arm 25.

[0076] By setting the first retaining arm 23 and the synchronization arm 24, the device body 2 can maintain the state of the mounting plate 22 when switching states, thereby maintaining the state of the conductive contact part 1 to be bonded, so as to facilitate subsequent conductive bonding operations.

[0077] In some embodiments, the device body 2 is further provided with a reinforcing arm 26, which is also arranged parallel to the active arm 21. One end of the reinforcing arm 26 is hinged to the synchronization arm 24, and the other end of the reinforcing arm 24 is hinged to the active arm 21 via a second connecting arm 27. Thus, a shape-adjustable parallelogram structure is formed between the active arm 21, the first connecting arm 25, the reinforcing arm 26, and the second connecting arm 27.

[0078] By providing the reinforcing arm 26, the reliability and stability of the active arm 21 and the first state maintaining mechanism can be improved during use, thereby improving the application effect of the power supply device. At the same time, when the device body 2 is in the storage state, the active arm 21 can be set vertically, while the other arms are in the storage state, such as Figure 2 As shown, the space occupied by the device can be reduced, the restrictions on the site environment can be reduced, and the application of the device can be more extensive. Figure 6 As shown, Figure 6 This is a schematic diagram comparing the space occupied by the power supply device of the present application and the conventional telescopic charging pile 4.

[0079] As an application example, in this embodiment, the second state maintaining mechanism includes a second retaining arm 28 , and a third strip-shaped guide portion 281 and a fourth strip-shaped guide portion 282 are provided on the second retaining arm 28 .

[0080] In some embodiments, the third strip-shaped guide portion 281 and the fourth strip-shaped guide portion 282 are structured in the form of strip-shaped holes.

[0081] In some embodiments, both the mounting plate 22 and the base plate 11 are provided with vertically shaped slots, and a second guide post 112 is disposed within the slots in the base plate 11. The rear end of the second retaining arm 28 is hinged to the mounting plate 22, and the guide rod 231 extends into the third strip guide portion 281, forming a transmission connection to coordinate with the movement of the first retaining arm 23. The second guide post 112 extends into the fourth strip guide portion 282, forming a transmission connection.

[0082] By providing the second retaining arm 28 , when the device body 2 switches states, the mounting plate 22 can be kept in the state to be attached and the vertical position height of the base plate 11 can be kept simultaneously.

[0083] In addition, this embodiment also provides a power supply system, which includes power-consuming equipment and the power supply device as described above; wherein the power-consuming equipment can be various transport vehicles, such as tank trucks used in molten iron transportation.

[0084] In some embodiments, the power-consuming device is provided with a power receiving portion, and the configuration of the power receiving portion is adapted to the configuration of the electrode 12. When the power-consuming device needs to be charged, the power-consuming device is moved to a predetermined position, at which point the power supply device is in a retracted state. The driving assembly 3 can then be controlled to drive the power supply device from the retracted state to an extended state, so that the conductive contact portion 1 can move to contact and electrically connect with the power receiving portion. When charging is complete, the power supply device is driven to transition from the extended state to the retracted state.

[0085] Compared with the prior art, this embodiment has at least the following beneficial effects:

[0086] In this embodiment, the device body 2 is configured to include a retracted state and an extended state, which can avoid the problem of wire invasion and improve the application reliability of the device; at the same time, a first state maintaining mechanism and a second state maintaining mechanism are provided on the device body 2, and a driving component 3 is provided for driving the device body 2 to switch between the retracted state and the extended state. The overall structure is simple and the design is ingenious.

[0087] In addition, by switching between the retracted state and the extended state, the conductive contact part 1 can be driven to change its position to achieve the conduction of the conductive contact or the separation of the conductive contact; and the first state maintaining mechanism provided can maintain the ready-to-fit state of the conductive contact part 1 when the state is switched, so as to improve the fitting reliability of the conductive contact part 1 when making conductive contact; and the second state maintaining mechanism provided can be used to maintain the position height of the conductive contact part 1 when the state is switched, thereby further improving the fitting reliability of the conductive contact part 1 when making conductive contact, and improving the use effect and user experience.

[0088] The above description is only a specific implementation method of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present application, which should also be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

[0089] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

Claims

1. A power supply device, characterized in that: include: conductive contact portion; The device body includes a retracted state and an extended state, and the conductive contact portion is provided on the device body; the device body is provided with a first state maintaining mechanism and a second state maintaining mechanism, the first state maintaining mechanism is used to maintain the ready-to-attach state of the conductive contact portion when the state of the device body is switched, and the second state maintaining mechanism is used to maintain the position height of the conductive contact portion when the state of the device body is switched; A drive assembly, the drive assembly being in transmission connection with the device body; The device body includes an active arm, the middle portion of the active arm is hinged and fixed, the drive assembly is connected to the bottom end of the active arm, and the conductive contact portion is connected to the top end of the active arm; the top end of the active arm is hingedly provided with a mounting plate, the conductive contact portion includes a bottom plate, the bottom plate is provided on the mounting plate, and the bottom plate can slide up and down relative to the mounting plate; The first state maintaining mechanism includes a first holding arm and a synchronization arm, the middle portion of the first holding arm is hinged to the active arm, the mounting plate is provided with a second strip-shaped guide portion, the front end of the first holding arm is provided with a guide rod, and the guide rod extends into the second strip-shaped guide portion; the synchronization arm is arranged parallel to the active arm, one end of the synchronization arm is hinged to the rear end of the first holding arm, and the other end of the synchronization arm is hinged to the active arm via a first connecting arm; The second state maintaining mechanism includes a second retaining arm, on which a third strip guide portion and a fourth strip guide portion are provided; the rear end of the second retaining arm is hinged to the mounting plate, and the guide rod extends into the third strip guide portion and forms a transmission connection; a second guide column is provided on the base plate, and the second guide column extends into the fourth strip guide portion and forms a transmission connection.

2. The power supply device according to claim 1, characterized in that: The driving assembly includes a sliding plate, and a first guide column is provided on the sliding plate; A first strip-shaped guide portion is provided at the bottom end of the active arm, and the first guide column is extended into the first strip-shaped guide portion to form a transmission connection.

3. The power supply device according to claim 2, characterized in that: The driving assembly further comprises a driving motor, a driving gear is provided on the rotating shaft of the driving motor, a transmission rack is provided on the sliding plate, and the driving gear is meshedly connected with the transmission rack; Alternatively, the driving assembly further comprises a telescopic cylinder, a movable end of the telescopic cylinder being connected to the sliding plate.

4. The power supply device according to claim 1, wherein: The device body also includes a reinforcing arm, which is arranged parallel to the active arm. One end of the reinforcing arm is hinged to the synchronization arm, and a second connecting arm is hinged between the other end of the reinforcing arm and the active arm.

5. The power supply device according to claim 1, wherein: The conductive contact portion further includes an electrode, which is arranged on the outer side of the bottom plate, and an elastic buffer is arranged between the electrode and the bottom plate.

6. A power supply system, characterized in that: Comprising an electrical device and a power supply device as described in any one of claims 1 to 5 above; The electrical device is provided with a power receiving portion, and the conductive contact portion can move to contact with the power receiving portion and be electrically connected thereto.

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