Battery replacement system locking mechanism for pure electric heavy truck

Abstract

The invention relates to the technical field of battery replacement of heavy trucks, in particular to a battery replacement system locking mechanism for a pure electric heavy truck, which comprises a supporting table and a battery box, connecting parts are arranged at the bottoms of four corners of the battery box, embedding grooves are formed in the bottoms of the connecting parts, and an inflation tube supporting assembly is arranged at the top of the supporting table. An air expansion shaft is arranged on the inflation pipe supporting assembly and matched with the embedding groove. A clamping and binding assembly is arranged on the supporting table, when a clamping part of the clamping and binding assembly rotates towards the middle of the supporting table, the battery box is pressed down and bound, a ratchet wheel is arranged on the clamping and binding assembly along the rotating axis of the clamping part, a locking rod assembly is arranged on the inflation supporting assembly, and a stopping part of the locking rod assembly is embedded into a tooth groove of the ratchet wheel. Through the unique structural design that the upper opening of the trapezoidal groove is small and the lower opening of the trapezoidal groove is large, the inflatable shaft can be accurately and rapidly guided into the circular groove in the hoisting and falling process of the battery box, so that rapid and accurate positioning of the battery box is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of battery replacement for heavy trucks, and in particular to a locking mechanism for a battery replacement system of a pure electric heavy truck. Background Art

[0002] At present, in the field of battery replacement technology for electric heavy-duty trucks, in order to improve the operational efficiency and endurance flexibility of electric heavy-duty trucks, the battery boxes equipped with heavy-duty trucks generally adopt a standardized, modular and quickly replaceable structural design. This design enables electric heavy-duty trucks to quickly complete the battery box replacement operation in dedicated battery replacement stations with the help of efficient and precise battery replacement operation processes.

[0003] During the specific implementation of the battery replacement operation, the battery box relies on a special battery replacement device to achieve accurate and orderly replacement. During this process, in order to ensure the safety and stability of the battery box during the lifting process, a special lifting fixture is required to realize the lifting and removal of the container-type battery box, thereby fully completing the entire battery box replacement operation process.

[0004] However, given that the battery box is mainly hoisted during the battery replacement process, under the existing technical system, the hoisting fixture generally adopts a winding steel cable drive method to achieve its vertical movement up and down, but this drive method has significant technical limitations. Since the steel cable is prone to elastic deformation, relaxation and uneven force during the winding process, the horizontal movement accuracy of the hoisting fixture is difficult to meet the requirements of high-precision positioning. This deviation in horizontal accuracy will cause great difficulties in the precise positioning of the battery box during the placement process, making it difficult to accurately install the battery box to the predetermined position, thereby affecting the reliability of the electrical connection and mechanical fixation between the battery box and the electric heavy truck.

[0005] In addition, after the battery box is locked and fixed and put into long-term operation with the battery-swapping vehicle, the vehicle will inevitably be affected by various complex working conditions during driving, such as vibrations caused by road bumps, impacts caused by frequent starting and stopping of the vehicle, and friction and wear between components. The combined effect of these factors may cause varying degrees of wear and deformation at the connection between the battery box and the electric heavy-duty truck. Once wear or deformation occurs at the connection, it will directly lead to a decrease in the installation stability of the battery box, which may not only cause safety hazards such as loosening and displacement of the battery box during vehicle driving, but may even seriously affect the efficiency and quality of subsequent loading and unloading of the battery box, increasing the difficulty and risk of battery swap operations. Summary of the Invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a locking mechanism for a battery swap system of a pure electric heavy truck to solve the above problems.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A locking mechanism for a battery exchange system of a pure electric heavy-duty truck comprises a support platform and a battery box, wherein the bottoms of the four corners of the battery box are provided with connecting parts, the bottoms of the connecting parts are provided with engaging grooves, an inflation tube support assembly is provided on the top of the support platform, and an inflatable shaft is provided on the inflation tube support assembly, and the inflatable shaft matches the engaging groove; a clamping and restraining assembly is provided on the support platform, and when the clamping part of the clamping and restraining assembly rotates toward the middle of the support platform, the battery box is pressed down and restrained, a ratchet is provided along the rotation axis of the clamping part on the clamping and restraining assembly, and a locking rod assembly is provided on the inflation support assembly, and the stop part of the locking rod assembly is engaged with the tooth groove of the ratchet.

[0009] Preferably, the interlocking groove consists of a circular groove and a trapezoidal groove, the width of the upper opening of the trapezoidal groove is smaller than the width of the lower opening, the upper opening is connected to the inside of the circular groove, and the width of the upper opening is smaller than the diameter of the circular groove.

[0010] Preferably, the inflation tube support assembly includes an inner shell fixed on the support platform, the top of the inner shell is slidably matched with the outer shell, and a first spring is installed between the inner bottom wall of the inner shell and the inner top wall of the outer shell.

[0011] Preferably, it further comprises a T-shaped pipe, wherein the T-shaped pipe is provided with two output ends and one input end, the input end is connected to the inflatable shaft, the input end extends into the interior of the shell, and an electromagnetic valve is provided at the end.

[0012] Preferably, the clamping and restraining assembly includes a mounting base fixedly arranged on a support platform, the mounting base is rotatably connected to a hinge shaft, the hinge shaft is rotatably connected to a splint, the cross section of the splint is approximately L-shaped, and a soft pad is provided on the clamping surface of the splint.

[0013] Preferably, a cylinder body is installed on the support platform, a connecting rod is connected to the free end of the cylinder body via a hinge, and the other end of the connecting rod is hinged to the splint.

[0014] Preferably, the ratchet is coaxially fixedly connected to the hinge shaft; an arc-shaped groove is provided on the mounting seat, a sliding block is slidably fitted in the arc-shaped groove, a restraining rod is rotatably connected to the sliding block, and a second spring is installed between one side of the sliding block and the inner wall of the arc-shaped groove.

[0015] Preferably, the locking rod assembly includes a guide column arranged on the inflatable shaft, a baffle is provided at the other end of the guide column, a joint is sleeved on the guide column, and a third spring is installed between the joint and the baffle.

[0016] Preferably, a locking rod is fixedly connected to the joint component, the other end of the locking rod is located between the ratchet and the restraining rod, and the locking rod is provided with a plurality of barbs, which are engaged with the ratchet.

[0017] Preferably, a flexible sleeve is provided on the outer surface of the inflatable shaft.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention adopts a unique structural design of a trapezoidal groove with a small upper opening and a large lower opening. During the process of hoisting and dropping the battery box, the inflatable shaft can be accurately and quickly guided into the circular groove, thereby achieving rapid and accurate positioning of the battery box.

[0020] 2. During the battery box installation process of the present invention, when the splint presses down against the battery box and clamps and restrains it, the inflatable shaft automatically expands. The expanded inflatable shaft will tightly press against the inner wall of the circular groove to form a stable mechanical connection. The combination of the two restraining mechanisms of the present invention greatly enhances the stability and reliability of the battery box fixation.

[0021] 3. The present invention utilizes the cooperation mechanism of the locking rod, ratchet and barb, and the battery box stops automatically when it drops to the specified position. After that, the outer shell cannot move up and down, ensuring that the position of the battery box will not fluctuate due to factors such as vibration and impact during vehicle driving, providing a relatively stable operating environment for the battery box; and at this time, the splint cannot rotate clockwise, that is, the splint cannot release the clamping state of the battery box, avoiding the actual use of the battery box. When unexpected working conditions such as operator misoperation and accidental collision occur, the free end of the cylinder body is caused to shrink, making the clamping and fixing effect of the splint on the battery box invalid, ensuring that the battery box always maintains a stable and reliable fixed state in various complex usage scenarios.

[0022] 4. The battery box of the present invention is not in direct contact with the support platform, but adopts an airtight installation method, which greatly reduces the contact area between the support platform and the battery box. The reduction in contact area can significantly reduce the transmission efficiency of vibration energy, thereby effectively weakening the conduction of vibration generated during vehicle driving to the battery box, providing a relatively stable operating environment for the battery box; and after the battery box adopts an airtight installation method, there is a gap area between its bottom and the support platform, so that air can flow freely at the bottom of the battery box. The flow of air can accelerate the dissipation of heat on the surface of the battery box, effectively improving the heat dissipation efficiency of the battery box, and ensuring that the battery box can maintain a suitable temperature range during operation, thereby extending the service life of the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 This is a structural diagram of the installation of the inflation tube support assembly of the present invention.

[0025] Figure 3It is a structural schematic diagram of the clamping and restraining assembly of the present invention.

[0026] Figure 4 It is a schematic cross-sectional structural diagram of the housing of the present invention.

[0027] Figure 5 Schematic diagram of the structure of the inflatable shaft of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the connection between the connecting portion and the inflatable shaft of the present invention.

[0029] Figure 7 For the present invention Figure 3 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0030] In the accompanying drawings: 1. Support platform; 2. Battery box; 3. Connecting part; 4. Inflatable shaft; 5. Ratchet; 6. Inflatable tube support assembly; 7. Circular groove; 8. Trapezoidal groove; 9. T-shaped pipe; 10. Clamping and restraining assembly; 11. Locking rod assembly; 12. First spring; 13. Solenoid valve; 14. Cylinder body; 15. Connecting rod; 16. Articulated shaft; 17. Clamping plate; 18. Arc-shaped slide groove; 19. Guide column; 20. Baffle; 21. Joint part; 22. Second spring; 23. Inner shell; 24. Outer shell; 25. Sliding block; 26. Locking rod; 27. Barb; 28. Flexible sleeve; 29. ​​Restraint rod; 30. Third spring; 31. Cushion; 32. Mounting seat. DETAILED DESCRIPTION

[0031] The following will refer to Figures 1 to 7 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0032] A locking mechanism for a battery swap system of a pure electric heavy truck, such as Figure 1-Figure 3 As shown, it includes a support platform 1 and a battery box 2. The bottom of the four corners of the battery box 2 is provided with a connecting part 3. During the specific implementation, the number and position of the connecting parts 3 can be set according to needs. In this embodiment, the number of connecting parts 3 is 4, and the bottom of the connecting part 3 is provided with an interlocking groove. The top of the support platform 1 is provided with an inflatable tube support assembly 6, and the inflatable tube support assembly 6 is provided with an inflatable shaft 4, which matches the interlocking groove; in the initial working condition, the inflatable shaft 4 is in a contracted state. When the battery box 2 is hoisted and dropped, the inflatable shaft 4 will be accurately embedded in the inside of the interlocking groove. Subsequently, by filling gas into the inside of the inflatable shaft 4 to make it expand, the mechanical interference force generated between the expanded inflatable shaft 4 and the inner wall of the interlocking groove is used to achieve reliable locking of the position of the battery box 2.

[0033] like Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, the interlocking groove is composed of a circular groove 7 and a trapezoidal groove 8, wherein the width dimension of the upper opening of the trapezoidal groove 8 is smaller than the width dimension of the lower opening, forming a trapezoidal cross-section structure that is narrow at the top and wide at the bottom, and the upper opening of the trapezoidal groove 8 is connected to the internal space of the circular groove 7, and the width dimension of the upper opening is smaller than the diameter dimension of the circular groove 7; during the hoisting and falling process of the battery box 2, due to factors such as installation errors and positioning accuracy limitations, it is difficult to achieve precise positioning, and through the unique structural design of the trapezoidal groove 8 with a small upper opening and a large lower opening, its guiding effect can guide the inflatable shaft 4 to smoothly enter the trapezoidal groove 8, and finally be accurately placed in the internal space of the circular groove 7; when the inflatable shaft 4 is inflated, since the width of its upper opening is smaller than the diameter of the circular groove 7, the inflated inflatable shaft 4 will tightly press against the inner wall of the circular groove 7 to form a stable mechanical connection. At the same time, due to the limitation of geometric dimensions, the inflatable shaft 4 cannot reverse into the trapezoidal groove 8, thereby effectively realizing the locking function of the position of the battery box 2.

[0034] In addition, a flexible sleeve 28 is provided on the outer surface of the inflatable shaft 4. When the inflatable shaft 4 is inflated, the flexible sleeve 28 can adaptively fill the tiny gap between the inflatable shaft 4 and the inner wall of the circular groove 7 by virtue of its good flexibility and deformability, so that the fit between the inflatable shaft 4 and the inner wall of the circular groove 7 is significantly improved. This enhanced fit can effectively increase the contact area and friction between the two, thereby improving the stability and reliability of the entire installation structure, ensuring that the battery box 2 will not loosen or shift due to vibration, impact and other factors during use.

[0035] like Figure 1-Figure 3 As shown, a clamping and restraining assembly 10 is provided on the support platform 1. When the clamping portion of the clamping and restraining assembly 10 rotates toward the middle of the support platform 1, the battery box 2 is pressed down and restrained. A ratchet 5 is provided along the rotation axis of the clamping portion on the clamping and restraining assembly 10, and a locking rod assembly 11 is provided on the inflatable support assembly. The stop portion of the locking rod assembly 11 is engaged with the tooth groove of the ratchet 5.

[0036] like Figure 2-Figure 4 and Figure 6 As shown, the inflation tube support assembly 6 includes an inner shell 23 fixed on the support platform 1, the top of the inner shell 23 is slidably matched with the outer shell 24, and a first spring 12 is installed between the inner bottom wall of the inner shell 23 and the inner top wall of the outer shell 24. It also includes a T-shaped pipe 9, and the T-shaped pipe 9 is provided with two output ends and an input end. The input end is connected to the inflatable shaft 4, the input end extends into the interior of the outer shell 24, and an electromagnetic valve 13 is provided at the end.

[0037] When the outer shell 24 moves downward under the action of the driving force, the volume of the sealed cavity enclosed by the inner shell 23 and the outer shell 24 changes accordingly. Specifically, as the outer shell 24 continues to move downward, the space of the sealed cavity gradually shrinks, and the gas inside the cavity is compressed, causing the gas pressure to increase; when the solenoid valve 13 is opened, the high-pressure gas flows into the interior of the T-shaped pipe 9, and then, guided by the T-shaped pipe 9, the high-pressure gas is input into the internal cavity of the inflatable shaft 4. As the high-pressure gas is continuously filled in, the inflatable shaft 4 expands.

[0038] It should be noted that this device adopts a set of sophisticated mechanical matching structures to achieve the installation of the battery box 2. Specifically, this device cleverly utilizes the relative movement relationship between the inner shell 23 and the outer shell 24 and the cavity structure between the two to jointly construct a unique air-spaced installation mechanism.

[0039] In the installed state, the first spring 12 applies a stable elastic supporting force between the inner shell 23 and the outer shell 24, so that the battery box 2 is not in direct rigid contact with the support platform 1. Instead, through this air-spaced installation method, the contact area between the support platform 1 and the battery box 2 is greatly reduced. The reduction in contact area can significantly reduce the transmission efficiency of vibration energy on the contact interface, thereby effectively weakening the transmission of vibration generated during vehicle driving to the battery box 2, providing a relatively stable operating environment for the battery box 2.

[0040] In addition, after the battery box 2 is installed in an airtight manner, a gap area with a certain height is formed between its bottom and the support platform 1, allowing air to flow freely at the bottom of the battery box 2, forming a good natural ventilation channel. The flow of air can accelerate the dissipation of heat on the surface of the battery box 2, effectively improving the heat dissipation efficiency of the battery box 2, ensuring that the battery box 2 can maintain a suitable temperature range during operation, and extending the service life of the battery.

[0041] At the same time, the cavity formed between the inner shell 23 and the outer shell 24 is filled with air, forming a cavity shock absorption system. The air absorbs and attenuates vibration energy, has good vibration reduction performance, further reduces the transmission of vibration to the battery box 2, and comprehensively improves the installation stability and operation reliability of the battery box 2.

[0042] like Figure 3 and Figure 7 As shown, the clamping and restraining assembly 10 includes a mounting base 32 fixedly arranged on the support platform 1, a hinge shaft 16 is rotatably connected to the mounting base 32, a clamping plate 17 is rotatably connected to the hinge shaft 16, the cross section of the clamping plate 17 is approximately L-shaped, and a soft pad 31 is provided on the clamping surface of the clamping plate 17; Figure 3As the clamping plate 17 rotates counterclockwise around the hinge shaft 16 under the action of the driving force, the clamping surface of the clamping plate 17 will gradually approach the top surface of the battery box 2 as the rotation progresses. The clamping surface of the clamping plate 17 presses down against the top surface of the battery box 2 with a certain pressure, thereby achieving a firm clamping and fixation of the battery box 2.

[0043] In addition, a soft pad 31 is provided on the clamping surface of the splint 17. The soft pad 31 is made of a material with good flexibility and elasticity. When the splint 17 clamps the battery box 2, the soft pad 31 will undergo elastic deformation under the action of pressure. This elastic deformation can enable the soft pad 31 to adaptively fit the micro-undulations and irregular shapes of the top surface of the battery box 2, thereby significantly increasing the contact area between the force-bearing surface of the battery box 2 and the clamping surface of the splint 17. The increase in contact area can effectively reduce the stress concentration on the contact surface and make the pressure distribution more uniform, thereby improving the fit between the force-bearing surface of the battery box 2 and the clamping surface of the splint 17, greatly enhancing the stability and reliability of the clamping fixation, and effectively avoiding the loosening or displacement of the battery box 2 due to factors such as vibration and impact during the operation of the equipment.

[0044] like Figure 3 and Figure 7 As shown, a cylinder body 14 is installed on the support platform 1, and a connecting rod 15 is connected to the free end of the cylinder body 14 through a hinge. The other end of the connecting rod 15 is hinged to the splint 17. When the free end of the cylinder body 14 is extended, the connecting rod 15 drives the splint 17 to rotate counterclockwise around the hinge shaft 16, and the clamping surface of the splint 17 presses downward against the top surface of the battery box 2.

[0045] The ratchet 5 is coaxially fixedly connected to the hinge shaft 16; an arc-shaped slide groove 18 is provided on the mounting seat 32, and a sliding block 25 is slidably fitted in the arc-shaped slide groove 18. A restraining rod 29 is rotatably connected to the sliding block 25 so that the restraining rod 29 can move along the direction of the arc-shaped slide groove 18, and a second spring 22 is installed between one side of the sliding block 25 and the inner wall of the arc-shaped slide groove 18.

[0046] like Figure 4 and Figure 5 As shown, the locking rod assembly 11 includes a guide column 19 arranged on the inflatable shaft 4, a baffle 20 is provided at the other end of the guide column 19, a joint part 21 is sleeved on the guide column 19, the joint part 21 can slide along the direction of the guide column 19, and the joint part 21 can rotate, and a third spring 30 is installed between the joint part 21 and the baffle 20.

[0047] like Figure 3 、 Figure 5 and Figure 7As shown, a locking rod 26 is fixedly connected to the joint 21, and the other end of the locking rod 26 is located between the ratchet 5 and the restraining rod 29. The restraining rod 29 pushes against the locking rod 26 so that the locking rod 26 is provided with a plurality of barbs 27, and the barbs 27 are engaged with the ratchet 5.

[0048] When the device is performing the installation operation of the battery box 2, under the initial working condition, the pneumatic shaft 4 is in a retracted state. When the battery box 2 is hoisted and lowered, it is difficult to achieve precise positioning due to factors such as installation errors and positioning accuracy limitations. Through the unique structural design of the trapezoidal groove 8 with a small upper opening and a large lower opening, by utilizing its guiding effect, the pneumatic shaft 4 can be quickly guided into the trapezoidal groove 8 smoothly and finally accurately placed into the internal space of the circular groove 7, thereby achieving rapid and accurate positioning of the battery box 2.

[0049] Then, the free end of the control cylinder 14 extends out, and the connecting rod 15 drives the splint 17 to rotate counterclockwise with the hinge shaft 16 as the axis. The clamping surface of the splint 17 presses downward against the top surface of the battery box 2, and the battery box 2 and the outer shell 24 move downward. As the outer shell 24 continues to move downward, the volume of the sealed cavity enclosed by the inner shell 23 and the outer shell 24 gradually shrinks, and the gas inside the cavity is compressed, resulting in an increase in gas pressure (at the same time, the first spring 12 is compressed), and the high-pressure gas flows into the interior of the T-shaped pipe 9. Subsequently, through the guidance of the T-shaped pipe 9, the high-pressure gas is input into the internal cavity of the inflatable shaft 4, and the inflatable shaft 4 expands. The expanded inflatable shaft 4 will tightly press against the inner wall of the circular groove 7 to form a stable mechanical connection. At the same time, due to the limitation of geometric dimensions, the inflatable shaft 4 cannot reverse into the trapezoidal groove 8, thereby effectively realizing the locking function of the position of the battery box 2; after the inflatable shaft 4 expands, the solenoid valve 13 can be closed to ensure that the internal pressure of the inflatable shaft 4 is stable.

[0050] It should be noted that, during the process of the clamping plate 17 pressing against the battery box 2 and lowering, the clamping force on the battery box 2 gradually increases, and at the same time, the joint part 21 follows the shell 24 to lower, so that the battery box 2 is Figure 7 The end of the locking rod 26 provided with the barb 27 moves to the right, and the ratchet 5 does not restrict the movement of the locking rod 26 at this time.

[0051] When the joint 21 descends until the locking rod 26 is in a horizontal state, that is, the locking rod 26 moves to the right to the limit, if the shell 24 continues to descend, the locking rod 26 needs to move to the left. Due to the cooperation mechanism of the ratchet 5 and the barb 27, the locking rod 26 cannot move to the left at this time, that is, after the battery box 2 descends to the set position, the shell 24 descends to the specified position, the battery box 2 can no longer continue to descend, and the control cylinder 14 stops. Due to the cooperation mechanism of the ratchet 5 and the barb 27, the shell 24 cannot move upward at this time, ensuring that the position of the battery box 2 will not fluctuate due to factors such as vibration and impact during the driving of the vehicle, providing a relatively stable operating environment for the battery box 2.

[0052] It is worth noting that due to the cooperation mechanism of the ratchet 5 and the barb 27, the splint 17 cannot rotate clockwise at this time, which avoids the uncontrolled contraction of the free end of the cylinder 14 associated with the splint 17 due to unexpected working conditions such as operator misoperation and accidental collision during the actual use of the battery box 2. Once the free end of the cylinder 14 contracts, the mechanical fixed connection relationship between the splint 17 and the battery box 2 will be destroyed, making the clamping and fixing effect of the splint 17 on the battery box 2 invalid. The design of the locking mechanism of the ratchet 5 and the barb 27 of this device can ensure that the battery box 2 always maintains a stable and reliable fixed state in various complex usage scenarios.

[0053] It should be noted that when the joint 21 descends and causes the locking rod 26 to move to the right, the restraining rod 29 will adaptively move. Through the setting of the restraining rod 29, the barb 27 on the locking rod 26 is tightly fitted with the ratchet 5, and the restraining rod 29 can rotate on its own, which can reduce the resistance of the restraining rod 29 during movement.

[0054] When the battery box 2 is disassembled, Figure 5 As shown, the locking lever 26 is pulled leftward (the third spring 30 is compressed), the barb 27 on the locking lever 26 is disengaged from the tooth groove of the ratchet 5, and the locking lever 26 is no longer in contact with the restraining lever 29, thereby releasing the limit on the splint 17.

[0055] Then, the free end of the control cylinder 14 is contracted and the solenoid valve 13 is opened, so that the clamping plate 17 rotates clockwise, thereby releasing the clamping of the battery box 2. At the same time, the first spring 12 pushes against the outer shell 24 to rise, and the inflatable shaft 4 is exhausted and contracted, thereby releasing the lock on the connecting part 3. Finally, the battery box 2 is removed by an external lifting tool.

[0056] It should be noted that in the description of the present invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and are not intended to indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0058] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A locking mechanism for a battery swap system of a pure electric heavy truck, comprising a support platform (1) and a battery box (2), characterized in that: The bottom of each of the four corners of the battery box (2) is provided with a connecting portion (3), and an engaging groove is provided at the bottom of the connecting portion (3). An inflation tube support assembly (6) is provided on the top of the support platform (1), and an inflatable shaft (4) is provided on the inflation tube support assembly (6), and the inflatable shaft (4) matches the engaging groove; a clamping and restraining assembly (10) is provided on the support platform (1), and when the clamping portion of the clamping and restraining assembly (10) rotates toward the middle of the support platform (1), the battery box (2) is pressed down and restrained, and a ratchet (5) is provided on the clamping and restraining assembly (10) along the rotating axis of the clamping portion, and a locking rod assembly (11) is provided on the inflation support assembly, and the stop portion of the locking rod assembly (11) is engaged with the tooth groove of the ratchet (5).

2. The locking mechanism of a battery swap system for a pure electric heavy truck according to claim 1, characterized in that: The interlocking groove consists of a circular groove (7) and a trapezoidal groove (8), the width of the upper opening of the trapezoidal groove (8) is smaller than the width of the lower opening, the upper opening is communicated with the inside of the circular groove (7), and the width of the upper opening is smaller than the diameter of the circular groove (7).

3. The locking mechanism of a battery swap system for a pure electric heavy truck according to claim 1, characterized in that: The inflation tube support assembly (6) comprises an inner shell (23) fixed on the support platform (1), the top of the inner shell (23) is slidably matched with the outer shell (24), and a first spring (12) is installed between the inner bottom wall of the inner shell (23) and the inner top wall of the outer shell (24).

4. The locking mechanism of a battery swap system for a pure electric heavy truck according to claim 3, characterized in that: It also includes a T-shaped pipe (9), which is provided with two output ends and an input end, the input end is connected to the inflatable shaft (4), the input end extends into the interior of the housing (24), and the end is provided with a solenoid valve (13).

5. The locking mechanism of a battery swap system for a pure electric heavy truck according to claim 1, characterized in that: The clamping and restraining assembly (10) includes a mounting seat (32) fixedly arranged on a support platform (1), a hinge shaft (16) being rotatably connected to the mounting seat (32), a clamping plate (17) being rotatably connected to the hinge shaft (16), the clamping plate (17) having an approximately L-shaped cross section, and a soft pad (31) being provided on the clamping surface of the clamping plate (17).

6. The locking mechanism of the battery swap system for a pure electric heavy truck according to claim 5, characterized in that: A cylinder body (14) is installed on the support platform (1), a connecting rod (15) is connected to the free end of the cylinder body (14) via a hinge, and the other end of the connecting rod (15) is hinged to a clamping plate (17).

7. The locking mechanism for a battery swap system of a pure electric heavy truck according to claim 5, characterized in that: The ratchet (5) is coaxially fixedly connected to the hinge shaft (16); an arc-shaped slide groove (18) is provided on the mounting seat (32); a sliding block (25) is slidably fitted in the arc-shaped slide groove (18); a restraining rod (29) is rotatably connected to the sliding block (25); and a second spring (22) is installed between one side of the sliding block (25) and the inner wall of the arc-shaped slide groove (18).

8. The locking mechanism for a battery swap system of a pure electric heavy truck according to claim 7, characterized in that: The locking rod assembly (11) comprises a guide column (19) arranged on the inflatable shaft (4), a baffle (20) is provided at the other end of the guide column (19), a joint component (21) is sleeved on the guide column (19), and a third spring (30) is installed between the joint component (21) and the baffle (20).

9. The locking mechanism of a battery swap system for a pure electric heavy truck according to claim 8, characterized in that: A locking rod (26) is fixedly connected to the joint part (21), and the other end of the locking rod (26) is located between the ratchet (5) and the restraining rod (29). The locking rod (26) is provided with a plurality of barbs (27), and the barbs (27) are engaged with the ratchet (5).

10. The locking mechanism of a battery swap system for a pure electric heavy truck according to claim 1, characterized in that: A flexible sleeve (28) is sleeved on the outer surface of the inflatable shaft (4).

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