Chassis battery replacing device for new energy heavy truck

Abstract

A chassis battery replacing device for a new energy heavy truck comprises an upper battery replacing frame and a lower battery replacing frame which are connected through at least one locking mechanism, and a power battery pack is fixedly arranged on the lower battery replacing frame; the locking mechanism comprises a locking shaft arranged on the lower battery replacing frame and at least one electromagnetic locking mechanism arranged on the upper battery replacing frame and used for fixing the locking shaft, a high-voltage junction box is further arranged on the lower battery replacing frame, and a vehicle end connector matched with the high-voltage junction box is further arranged on the upper battery replacing frame. According to the utility model, the electromagnetic locking mechanism of the locking mechanism is controlled by the vehicle end power supply to lock and unlock the locking shaft, and the locking and unlocking of the power battery pack can be realized without the help of RGV equipment of the battery swap station, so that the disassembly place of the power battery pack is not limited, and the quick battery swap of the power battery pack can be realized at the battery swap station end; in a maintenance station, the power battery pack can be quickly assembled and disassembled. In addition, the equipment cost of the battery swap station can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery replacement for new energy heavy trucks, and in particular to a chassis battery replacement device for new energy heavy trucks. Background Art

[0002] In recent years, my country's commercial vehicle market has gradually moved towards electrification under the guidance of the "3060" and "dual carbon" goals. Pure electric commercial vehicles can be divided into two types according to the energy replenishment method: charging and battery replacement. In the charging form, the energy replenishment time generally takes 1-2 hours, and the long energy replenishment time is not conducive to the efficient operation of commercial vehicles. In the battery replacement form, the battery replacement time is generally 2-5 minutes, which is comparable to the efficiency of refueling. Combined with the "vehicle-battery separation" purchase model, logistics companies only need to purchase non-powered bodies and rent power batteries. According to the actual power usage of the vehicle, pay the battery fee to the battery replacement operator, which greatly reduces the cost of purchasing vehicles. The battery replacement model is more favored by logistics companies. At present, the battery replacement of new energy heavy trucks is mainly based on "battery back" and "back battery replacement". The power battery pack is arranged behind the cab and in front of the cargo box. Under such conditions, there are problems such as high center of gravity of the vehicle, low power of the power battery pack, and occupying part of the cargo space. It is not suitable for long-distance trunk transportation scenarios. New technologies such as "battery bottom" and "chassis battery replacement" have begun to emerge, attracting industry attention.

[0003] Most of the locking mechanisms currently used by manufacturers require the RGV equipment of the battery swap station to lock and unlock the battery swap frame. The station-side unlocking solution is overly dependent on the battery swap station, which has the problem of limited locations for disassembly of vehicle power battery packs, and the equipment cost of the battery swap station is high. In addition, the existing battery swap frame can only adapt to customized battery special-shaped packs, and cannot carry standard battery packs produced by other manufacturers, with poor versatility. Some manufacturers configure a small number of electrical connectors, do not support vehicle fast charging, and have many restrictions. Utility Model Content

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A chassis battery-swapping device for a new energy heavy-duty truck comprises a battery-swapping upper frame and a battery-swapping lower frame connected by at least one locking mechanism, wherein a power battery pack is fixedly disposed on the battery-swapping lower frame; each of the locking mechanisms comprises a locking shaft and at least one electromagnetic locking mechanism for fixing the locking shaft, wherein the locking shaft is mounted on the battery-swapping lower frame, wherein the electromagnetic locking mechanism is mounted on the battery-swapping upper frame, wherein a high-voltage junction box is also disposed on the battery-swapping lower frame, and wherein a vehicle-end connector cooperating with the high-voltage junction box is also disposed on the battery-swapping upper frame.

[0006] Furthermore, the battery exchange lower frame is a truss structure composed of multiple layers of fixed frames, and the locking shaft is arranged on the uppermost fixed frame. Specifically, a battery fixing bracket for installing the battery pack is fixed on each layer of the fixed frame.

[0007] Furthermore, the battery swap upper frame is arranged above the battery swap lower frame, and the battery swap upper frame is composed of a plurality of battery frames arranged at intervals, and a plurality of cross beams for strengthening the rigid structure are arranged between adjacent battery frames.

[0008] Furthermore, the vehicle-end connector includes a connector bracket fixedly connected to the battery exchange upper frame, and the connector bracket is provided with a battery exchange connector connected to the high-voltage junction box.

[0009] Furthermore, the electromagnetic locking mechanism includes a push rod and a driving mechanism for controlling the push rod, one end of the push rod is provided with a clamp for supporting the locking shaft, and the other end of the push rod passes through the driving mechanism; the driving mechanism includes an outer shell, the outer shell is provided with an energized electromagnetic suction cup and a de-energized electromagnetic suction cup, and a part of the fixed sleeve of the push rod in the outer shell is provided with a first disk that can be adsorbed by the energized electromagnetic suction cup and a second disk that can be adsorbed by the de-energized electromagnetic suction cup.

[0010] Furthermore, a first locking block and a second locking block are arranged at intervals from top to bottom on the top of the locking shaft, and a locking groove for being held by a clamp is formed between the first locking block and the second locking block; the clamp includes a pressing block, and a first limiting groove and a second limiting groove are provided on a side of the pressing block facing the locking shaft, matching the shape of the first locking block and the second locking block, and the first limiting groove and the second limiting groove form a double-layer stop.

[0011] Furthermore, the cross-section of the end of the push rod close to the locking shaft is D-shaped, and the clamp is provided with a through hole for the push rod to pass through, and the shape of the through hole is D-shaped that matches the end of the push rod, and the clamp is provided with a fixing bolt for fixing the clamp to the push rod.

[0012] Furthermore, a fixed plate is provided at the bottom of the driving mechanism, and the clamp is provided with a rolling assembly for supporting and assisting the movement of the clamp, the rolling assembly includes a screw rod passing through both sides of the pressing block, and also includes two bearings rotatably fixed on the screw rod by round nuts and stop washers, and the bearings are arranged on both sides of the pressing block.

[0013] Furthermore, the driving mechanism also includes a controller, which is connected to the energized electromagnetic chuck and the de-energized electromagnetic chuck respectively through a control harness, and the controller is also connected to an unlocking position sensor and a locking position sensor through a control harness.

[0014] Furthermore, a first end cover and a second end cover are respectively provided on both sides of the outer shell, the first end cover is close to the locking shaft, and the second end cover is far away from the locking shaft, and the push rod passes through the first end cover and the second end cover; a spring is sleeved on one end of the push rod close to the locking shaft, one end of the spring is supported by the first end cover, and the other end of the spring is supported by the clamp; a limit nut is provided on the end of the push rod passing through the second end cover.

[0015] Compared with the prior art, the beneficial effects produced by the utility model are:

[0016] 1. The utility model controls the electromagnetic locking mechanism of the locking mechanism through the vehicle-side power supply to lock and unlock the locking shaft. The power battery pack can be locked and unlocked without the help of the RGV equipment of the battery swap station, so that the disassembly location of the power battery pack is not restricted. At the battery swap station, the power battery pack can be quickly replaced; at the maintenance station, the power battery pack can be quickly loaded and unloaded. In addition, it can also reduce the equipment cost of the battery swap station.

[0017] 2. The utility model carries the power battery pack by means of a battery swap upper frame and a battery swap lower frame that are fixedly assembled by a locking mechanism. Under the condition that the sizes of the battery swap upper frame and the battery swap lower frame are consistent, power battery packs of different specifications produced by different manufacturers can be carried. It has high compatibility, can realize rapid replacement of the power battery pack mounted on the bottom of the vehicle, and has strong versatility.

[0018] 3. The utility model realizes the assembly and fixation of the battery replacement upper frame and the battery replacement lower frame equipped with the power battery pack through a locking mechanism with an electromagnetic locking mechanism. The assembly is firm, the reliability is high, and the operation is simple, providing great convenience for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the locked state of the utility model.

[0020] Figure 2 It is a schematic diagram of the unlocking state of the utility model.

[0021] Figure 3 This is a three-dimensional diagram of the battery replacement frame.

[0022] Figure 4 This is a three-dimensional diagram of the lower frame of the battery swap.

[0023] Figure 5 Schematic diagram of the locking state of the locking mechanism.

[0024] Figure 6 Schematic diagram of the unlocked state of the locking mechanism.

[0025] Figure 7 It is a structural schematic diagram of the electromagnetic locking mechanism.

[0026] Figure 8 for Figure 7 Cross-sectional view in the AA direction.

[0027] Fig. 9 This is the structural exploded diagram of the drive mechanism.

[0028] Fig.10 A three-dimensional view of the locking shaft.

[0029] Fig.11 This is an exploded view of the fixture structure.

[0030] Fig.12 This is a three-dimensional diagram of the high-voltage junction box.

[0031] Fig.13 This is the structural explosion diagram of the vehicle-end connector.

[0032] Fig.14 It is a structural schematic diagram of the vehicle-side connector and the high-voltage junction box.

[0033] Among them, the numbers in the figure are:

[0034] Battery replacement upper frame 10, positioning pin hole 11, crossbeam 12, battery frame 13,

[0035] Battery replacement lower frame 20, positioning pins 21, power battery pack 22, battery upper fixing bracket 23, battery bottom fixing bracket 24;

[0036] Locking mechanism 300, electromagnetic locking mechanism 301, fixing plate 302,

[0037] The locking shaft 310, the first locking block 311, the second locking block 312, the locking groove 313, the driving mechanism 320, the outer shell 321, the first end cover 322, the energized electromagnetic chuck 323, the de-energized electromagnetic chuck 324, the first disc 325, and the second disc 326,

[0038] The clamp 330, the pressing block 331, the through hole 332, the first limiting groove 333, the second limiting groove 334, and the fixing bolt 335,

[0039] Rolling assembly 340, screw 341, bearing 342, stop washer 343, round nut 344,

[0040] Controller 350, control harness 351, unlocking position sensor 352, locking position sensor 353,

[0041] Push rod 360, spring 361, limit nut 362;

[0042] High-voltage junction box 40, vehicle-end connector 50, connector bracket 51, and battery replacement connector 52. DETAILED DESCRIPTION

[0043] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0044] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "front", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A chassis battery replacement device for a new energy heavy truck includes a battery replacement upper frame 10 and a battery replacement lower frame 20 connected by at least one locking mechanism 300, and a power battery pack 22 is fixedly arranged on the battery replacement lower frame 20. Each locking mechanism 300 includes a locking shaft 310 and at least one electromagnetic locking mechanism 301 for fixing the locking shaft 310. The battery replacement lower frame 20 is composed of a truss structure composed of multiple layers of fixed frames (not shown in the figure), and a battery fixing bracket for installing a battery pack is fixed on each layer of the fixed frame, and the locking shaft 310 is arranged on the uppermost fixed frame. Specifically, the present embodiment adopts a plurality of locking mechanisms 300, which are arranged at intervals between the battery replacement upper frame 10 and the battery replacement lower frame 20.

[0046] Reference Figure 1 , Figure 2 and Figure 4 Specifically, in the present embodiment, the battery swap lower frame 20 is a truss structure composed of two layers of fixed frames. The battery fixing bracket provided on the bottom fixed frame is the battery bottom fixed bracket 24, which is fixed to the battery swap lower frame 20 by bolts; the battery fixing bracket provided on the upper fixed frame is the battery upper fixed bracket 23, which is fixed to the battery swap lower frame 20 by welding.

[0047] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The upper battery swap frame 10 is arranged on the top of the lower battery swap frame 20. The upper battery swap frame 10 is composed of a number of battery frames 13 arranged at intervals, and the adjacent battery frame brackets are provided with crossbeams 12 for strengthening the rigid structure. The uppermost fixed frame constituting the lower battery swap frame 20 is also provided with a number of positioning pins 21. During installation, they can be correspondingly inserted into the positioning pin holes 11 provided at the bottom of the battery frame 13 to fix the power battery pack 22 in the upper battery swap frame 10 and the lower battery swap frame 20.

[0048] Reference Figure 5-Figure 8 The locking mechanism 300 includes a locking shaft 310 and at least one electromagnetic locking mechanism 301 for fixing the locking shaft 310. The electromagnetic locking mechanism 301 includes a push rod 360 and a driving mechanism 320 for driving the push rod 360 to move. The driving mechanism 320 is arranged on the fixing plate 302. In this embodiment, it is preferred to use two driving mechanisms 320 to drive the push rod 360 to fix the locking shaft 310. The push rod 360 runs through the entire driving mechanism 320. A clamp 330 is sleeved on one end of the push rod 360 close to the locking shaft 310 to fix the position of the push rod 360. When the vehicle end sends an unlocking signal, the driving mechanism 320 controls the push rod 360 to move away from the locking shaft 310; when the vehicle end sends a locking signal, the driving mechanism 320 controls the push rod 360 to move toward the locking shaft 310 until the clamp 330 holds and fixes the locking shaft 310.

[0049] Reference Figure 7-Figure 9 The driving mechanism 320 includes an outer shell 321 and a first end cover 322 and a second end cover (not shown in the figure) disposed on both sides of the outer shell 321. The first end cover 322 is disposed at one end close to the locking shaft 310, and the second end cover is disposed at one end away from the locking shaft 310. The push rod 360 passes through the first end cover 322 and the second end cover. The outer shell 321 is provided with an energized electromagnetic chuck 323 and a de-energized electromagnetic chuck 324. The push rod 360 is partially fixedly sleeved with a first disc 325 and a second disc 326 in the outer shell 321. When the driving mechanism 320 is energized, the energized electromagnetic suction cup 323 generates a magnetic force, the first disc 325 is attracted by the energized electromagnetic suction cup 323, and the driving push rod 360 moves in the direction away from the locking shaft 310; when the driving mechanism 320 is not energized, the de-energized electromagnetic suction cup 324 generates a magnetic force, the second disc 326 is attracted by the de-energized electromagnetic suction cup 324, and the driving push rod 360 moves in the direction of the locking shaft 310.

[0050] Reference Figure 8 , Fig. 9 The driving mechanism 320 also includes a controller 350, which is connected to the powered electromagnetic chuck 323 and the de-powered electromagnetic chuck 324 through a control harness 351. Specifically, the control harness 351 of this embodiment integrates the electromagnetic chuck power line, the electromagnetic chuck bottom line, the position sensor power line, the position sensor bottom line and the position sensor signal line, so that the controller 350 can control the powered electromagnetic chuck 323 and the de-powered electromagnetic chuck 324 to generate magnetic force in different states. The controller 350 is also connected to an unlocking position sensor 352 and a locking position sensor 353 through the control harness 351, which can cooperate with the controller 350, the powered electromagnetic chuck 323 and the de-powered electromagnetic chuck 324 to output locking and unlocking signals respectively.

[0051] Reference Figure 5, Figure 6 , Fig. 9 , Fig.11 The end of the push rod 360 close to the locking shaft 310 is sleeved with a clamp 330, which can limit the position of the push rod 360 and hold the locking shaft 310. The push rod 360 is also sleeved with a spring 361, one end of the spring 361 holds the clamp 330, and the other end holds the first end cover 322 of the driving mechanism 320. The end of the push rod 360 away from the locking shaft 310 is sleeved with a limit nut 362. When the push rod 360 is driven by the first disc 325 to move toward the locking shaft 310, the first disc 325 and the second disc 326 fixed on the push rod 360 form a primary limit device, so that the displacement of the push rod is uniquely fixed. The limit nut 362 holds the second end cover, as a secondary limit device, and has a limit effect on the push rod 360.

[0052] Reference Fig.10 , Fig.11 , Figure 5 , Figure 6 The locking shaft 310 is provided with a first locking block 311 and a second locking block 312 arranged at intervals from top to bottom, and a locking groove 313 for being held by a clamp is formed between the first locking block 311 and the second locking block 312. Preferably, the first locking block 311 in this embodiment is in the shape of an inverted truncated cone.

[0053] Reference Figure 9-11 The clamp 330 includes a pressing block 331, which is provided with a through hole 332 for the push rod 360 to pass through, and the shape of the through hole 332 matches the shape of the end of the push rod 360 close to the locking shaft 310. A fixing bolt 335 is provided above the pressing block 331, which can be used to lock the pressing block 331 on the push rod 360. A first limiting groove 333 and a second limiting groove 334 are provided on the side of the pressing block 331 facing the locking shaft 310, which correspond to the first locking block 311 and the second locking block 312 of the locking shaft 310, respectively, to form a double-layer stop. When the push rod 360 moves toward the locking shaft 310 driven by the driving mechanism 320, the clamp 330 is driven to support the locking shaft 310, and the first locking block 311 and the second locking block 312 are respectively inserted into the first limiting groove 333 and the second limiting groove 334, and the pressing block 331 supports the locking groove 313 of the locking shaft 310 to fix the locking shaft 310.

[0054] Reference Figure 5 , Figure 6 and Fig.11The pressing block 331 is provided with a rolling assembly 340 for assisting the movement of the clamp 330. The rolling assembly 340 includes a screw rod 341 passing through both sides of the pressing block 331, and also includes two bearings 342 rotatably fixed on the screw rod 341 through a round nut 344 and a stop washer 343. The two bearings 342 are arranged on both sides of the pressing block 331. When the push rod 360 moves under the control of the driving mechanism 320, the clamp 330 moves with the push rod 360, and the rolling assembly 340 rolls on the fixed plate 302 below the driving mechanism 320, which not only assists the movement of the clamp 330, but also shares part of the load-bearing capacity of the clamp 330.

[0055] Reference Figure 5-Figure 11 When the driving mechanism 320 is powered on, the controller 350 obtains a voltage of 24V, and the energized electromagnetic suction cup 323 connected by the control harness 351 is energized to generate magnetic force, and the de-energized electromagnetic suction cup 324 has no magnetic force. The first disc 325 is adsorbed by the energized electromagnetic suction cup 323, driving the push rod 360 and the clamp 330 to move away from the locking shaft 310, the spring 361 is compressed, and the clamp 330 leaves the locking shaft 310 with the assistance of the rolling assembly 340, completing the unlocking action, and the unlocking position sensor 352 outputs an unlocking in place signal; when the driving mechanism 320 is not powered on, the controller 350 obtains a voltage of 24V, and the energized electromagnetic suction cup 323 is energized to generate magnetic force, and the de-energized electromagnetic suction cup 324 has no magnetic force. The first disc 325 is adsorbed by the energized electromagnetic suction cup 323, driving the push rod 360 and the clamp 330 to move away from the locking shaft 310, and the spring 361 is compressed. The clamp 330 leaves the locking shaft 310 with the assistance of the rolling assembly 340, completing the unlocking action, and the unlocking position sensor 352 outputs an unlocking in place signal. The controller 350 loses the 24V power supply, the energized electromagnetic suction cup 323 has no magnetic force, and the de-energized electromagnetic suction cup 324 has magnetic force, which attracts the second disc 326. The second disc 326 drives the push rod 360 to move toward the locking shaft 310, and the spring 361 is reset. The clamp 330 on the push rod 360 is inserted into the locking groove 313, and the first locking block 311 and the second locking block 312 are inserted into the first limit groove 333 and the second limit groove 334. The locking mechanism 300 locks the locking shaft 310 to complete the locking action, and the locking position sensor 353 outputs a locked in place signal.

[0056] Reference Figure 1 , Figure 2 , Fig.12 , Fig.13 , Fig.14 A high-voltage junction box 40 is provided in front of the battery-swap lower frame 20. A vehicle-end connector 50 is provided in front of the battery-swap upper frame 10. The vehicle-end connector 50 includes a connector bracket 51 fixedly connected to the battery-swap upper frame 10, and a battery-swap connector 52 corresponding to the high-voltage junction box 40 is provided on the connector bracket 51.

[0057] Reference Figure 1-Figure 14: The unlocking process of the vehicle chassis battery is as follows: when the power battery pack 22 is in a locked state, when the locking mechanism 300 sends a locked signal, if the vehicle-end control power is not connected, the power battery pack 22 remains in a locked state; if the vehicle-end power is connected, the drive mechanism 320 is energized, the locking mechanism 300 performs an unlocking action, the battery locking mechanism is separated from the locking shaft 310, and the locking mechanism 300 sends an unlocked signal to complete the unlocking of the power battery pack 22. The vehicle-end connector 50 is separated from the high-voltage junction box 40, and the charging and discharging circuit and cooling circuit of the power battery pack 22 are interrupted.

[0058] The locking process of the vehicle chassis battery is as follows: when the power battery pack 22 is in an unlocked state, when the locking mechanism 300 sends an unlocking signal, if the vehicle-end control power is connected, the power battery pack 22 remains unlocked; if the vehicle-end control power is not connected, the drive mechanism 320 is not powered, and the locking mechanism 300 performs a locking action. The electromagnetic locking mechanism 301 locks the locking shaft 310, fixes the battery exchange upper frame 10 and the battery exchange lower frame 20, and completes the locking of the power battery pack 22. The vehicle-end connector 50 corresponds to the high-voltage junction box 40, the charging and discharging circuit of the power battery pack 22 is connected, and the cooling circuit is opened. The battery branches of the power battery pack 22 flow back to the high-voltage junction box 40 to realize the charging and discharging of the power battery pack 22.

[0059] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A chassis battery replacement device for a new energy heavy truck, characterized in that: It includes a battery swap upper frame and a battery swap lower frame connected by at least one locking mechanism, and a power battery pack is fixed on the battery swap lower frame; each of the locking mechanisms includes a locking shaft and at least one electromagnetic locking mechanism for fixing the locking shaft, and the locking shaft is installed on the battery swap lower frame, and the electromagnetic locking mechanism is installed on the battery swap upper frame. A high-voltage junction box is also provided on the battery swap lower frame, and a vehicle-end connector that cooperates with the high-voltage junction box is also provided on the battery swap upper frame.

2. The chassis battery replacement device for a new energy heavy truck according to claim 1 is characterized in that: The battery-exchange lower frame is a truss structure composed of multiple layers of fixed frames, and the locking shaft is arranged on the uppermost fixed frame.

3. The chassis battery replacement device for a new energy heavy truck according to claim 1 is characterized in that: The battery exchange upper frame is arranged above the battery exchange lower frame. The battery exchange upper frame is composed of a plurality of battery frames arranged at intervals, and a plurality of beams for strengthening the rigid structure are arranged between adjacent battery frames.

4. The chassis battery replacement device for a new energy heavy truck according to claim 1 is characterized in that: The vehicle-end connector includes a connector bracket fixedly connected to the battery exchange upper frame, and the connector bracket is provided with a battery exchange connector connected to the high-voltage junction box.

5. The chassis battery replacement device for a new energy heavy truck according to claim 1 is characterized in that: The electromagnetic locking mechanism includes a push rod and a driving mechanism for controlling the push rod, one end of the push rod is provided with a clamp for supporting the locking shaft, and the other end of the push rod passes through the driving mechanism; the driving mechanism includes an outer shell, the outer shell is provided with an energized electromagnetic suction cup and a de-energized electromagnetic suction cup, and a part of the fixed sleeve of the push rod in the outer shell is provided with a first disk that can be adsorbed by the energized electromagnetic suction cup and a second disk that can be adsorbed by the de-energized electromagnetic suction cup.

6. The chassis battery replacement device for a new energy heavy truck according to claim 5 is characterized in that: The top of the locking shaft is provided with a first locking block and a second locking block arranged at intervals from top to bottom, and a locking groove for being held by a clamp is formed between the first locking block and the second locking block; the clamp includes a pressing block, and a first limiting groove and a second limiting groove are provided on a side of the pressing block facing the locking shaft, which match the shapes of the first locking block and the second locking block, and the first limiting groove and the second limiting groove form a double-layer stop.

7. The chassis battery replacement device for a new energy heavy truck according to claim 5 is characterized in that: The cross-section of the end of the push rod close to the locking shaft is D-shaped, and the clamp is provided with a through hole for the push rod to pass through. The shape of the through hole is D-shaped that matches the end of the push rod, and the clamp is provided with a fixing bolt for fixing the clamp to the push rod.

8. The chassis battery replacement device for a new energy heavy truck according to claim 5 is characterized in that: A fixed plate is provided at the bottom of the driving mechanism, and the clamp is provided with a rolling assembly for supporting and assisting the movement of the clamp. The rolling assembly includes a screw rod passing through both sides of the pressing block, and also includes two bearings rotatably fixed on the screw rod by round nuts and stop washers. The bearings are arranged on both sides of the pressing block.

9. The chassis battery replacement device for a new energy heavy truck according to claim 5 is characterized in that: The driving mechanism also includes a controller, which is connected to the energized electromagnetic chuck and the de-energized electromagnetic chuck respectively through a control harness, and the controller is also connected to an unlocking position sensor and a locking position sensor through a control harness.

10. The chassis battery replacement device for a new energy heavy truck according to claim 5 is characterized in that: A first end cover and a second end cover are respectively provided on both sides of the outer shell, the first end cover is close to the locking shaft, and the second end cover is far away from the locking shaft, and the push rod passes through the first end cover and the second end cover; a spring is sleeved on one end of the push rod close to the locking shaft, one end of the spring is supported by the first end cover, and the other end of the spring is supported by the clamp; a limit nut is provided on the end of the push rod passing through the second end cover.

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