A quick locking device for a battery box

Abstract

This invention relates to the field of battery swapping technology for new energy vehicles, specifically disclosing a quick-locking device for a battery box, including a sleeve and a locking nut installed inside it. The lower end of the locking nut extends below the sleeve, and the upper end of the locking nut is provided with a threaded groove. The upper end of the sleeve movably extends to the lower end of a locking screw, the thread at the lower end of the locking screw matching the thread inside the threaded groove. The upper end of the locking screw is bearing-connected to a T-shaped drive rod. The outer side of the locking screw is connected to the sleeve via a rotation angle limiting mechanism. A locking block is threaded on the inner side of the lower end of the sleeve, and the inner side of the upper end of the locking block is an annular inclined surface facing its shaft end. This invention can avoid jamming due to overuse, and can quickly lock and unlock, thereby greatly improving battery swapping efficiency. In addition, it is stable enough after locking, preventing loosening due to vibration.

Description

Technical Field

[0001] This invention relates to the field of battery swapping technology for new energy vehicles, specifically a battery box quick-locking device. Background Technology

[0002] With the rapid development of the new energy industry, battery swapping technology, as a new innovation after charging technology, enables new energy commercial vehicles to quickly replenish energy by replacing batteries. As the core energy storage component of new energy commercial vehicles, the battery box is usually installed at the bottom of the vehicle. The locking device plays a key role in the reliable connection and safe locking of the battery box to the chassis, which directly affects the battery swapping efficiency and driving safety.

[0003] The battery swapping mode places stringent requirements on the response speed, ease of operation, and structural reliability of the locking device, and requires higher configuration for the design of the locking structure. It inevitably requires more comfortable and user-friendly functional components. The long-life knob quick locking device can quickly change the lock. Currently, domestic quick lock changing systems require battery replacement. Using the long-life knob quick locking device can reduce waiting time, and the unlocking and battery swapping are fast, which can reduce waiting time.

[0004] The existing battery box quick-locking device is prone to jamming due to overuse, which will prevent it from rotating to the preset angle and thus cause the unlocking to fail.

[0005] In addition, the existing battery box quick-locking device has a long unlocking time, which will lead to longer battery swapping time.

[0006] Therefore, a quick-locking device for the battery box is needed to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a battery box quick-locking device to solve the problems mentioned in the background art, such as the tendency of existing battery box quick-locking devices to jam when overused and the low battery swapping efficiency.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A quick-locking device for a battery box includes a sleeve and a locking nut installed inside it. The lower end of the locking nut extends below the sleeve, and the upper end of the locking nut is provided with a threaded groove. The lower end of a locking screw is movably inserted into the upper end of the sleeve. The thread at the lower end of the locking screw matches the thread inside the threaded groove. A T-shaped drive rod is connected to the upper end of the locking screw via a bearing. The outer side of the locking screw is connected to the sleeve via a rotation angle limiting mechanism. A locking block is threaded on the inner side of the lower end of the sleeve. The upper inner side of the locking block is an annular inclined surface facing its shaft end. A check block is engaged with the upper end of the locking block. The check block is movably sleeved on the outside of the locking nut. The inner side of the check block and the outer side of the locking nut are mutually matching regular hexagonal structures. A limit spring is provided between the upper surface of the check block and the upper middle part of the locking nut. The lower end of the sleeve is connected to the locking block through an anti-rotation limit locking mechanism. The anti-rotation limit locking mechanism includes an embedded groove provided at the lower end of the locking block.

[0010] Preferably, the rotation angle limiting mechanism includes two spiral grooves disposed on the sleeve, the two spiral grooves being symmetrically arranged about the axis of the sleeve, the spiral grooves penetrating the inner and outer sides of the sleeve, and two pin blocks being fixedly connected to the locking screw, the two pin blocks being symmetrically arranged about the axis of the sleeve, the pin blocks engaging and sliding through the corresponding spiral grooves.

[0011] Preferably, two embedding slots are provided at the lower end of the locking block, and the two embedding slots are symmetrically arranged about the axis of the locking block.

[0012] Preferably, the anti-rotation limiting locking mechanism further includes an air chamber at the lower end of the sleeve. There are two air chambers, each corresponding to an embedded groove. A safety valve is installed on the air chamber, extending to the outside of the sleeve. One end of a cavity rod is slidably connected inside the air chamber. A support tube is provided on the air chamber, extending movably to the inside of the sleeve. The end of the support tube inside the air chamber is movably sleeved on the outside of the other end of the cavity rod. A pressure spring is provided between one end of the cavity rod and the end of the support tube inside the air chamber. An embedded block is coaxially fixedly connected to the end of the support tube outside the air chamber. The embedded block engages and slides within the corresponding embedded groove.

[0013] Preferably, the inner contour of the embedding groove and the outer contour of the embedding block are mutually matching isosceles trapezoids, so that the outer side of the embedding block and the inner side of the embedding groove are in stable and tight contact.

[0014] Preferably, the lower end of the spiral groove is provided with an anti-reverse limiting mechanism, which includes a piston chamber disposed within the sleeve.

[0015] Preferably, the piston end of the piston rod is slidably connected inside the piston chamber, the rod end of the piston rod extends movably to the lower end of the spiral groove, an annular limiting piece is provided on the rod end of the piston rod, and a return spring is movably sleeved on the outside of the rod end of the piston rod between the annular limiting piece and the lower end of the corresponding spiral groove. The piston chamber is connected to the air chamber through a one-way air guide pipe, and the piston chamber is connected to the outside of the sleeve through a one-way air inlet.

[0016] Preferably, the pin block is provided with a locking hole, the inner top end of the locking hole is provided with a limit rod, the interior of the locking hole is slidably connected with an inner block, the upper surface of the inner block is provided with a limit hole corresponding to the limit rod, the limit rod and the corresponding limit hole are nested and slidably connected, the locking hole and the piston rod are provided in a one-to-one correspondence, and the inner diameter of the locking hole matches the upper outer diameter of the piston rod.

[0017] Preferably, the upper end of the locking screw is provided with an arc-shaped cavity, and there are two arc-shaped cavities. The two arc-shaped cavities are symmetrically arranged about the axis of the sleeve. One end of an arc-shaped component is slidably connected in each arc-shaped cavity. A paddle is fixedly connected to the outer side of the lower end of the drive rod. There are two paddles, and the two paddles are symmetrically arranged about the axis of the drive rod. The arc-shaped component and the paddle are arranged in a one-to-one correspondence. The other end of the arc-shaped component is fixedly connected to the paddle.

[0018] Preferably, the locking screw has an internal air collecting chamber, which is connected to two arc-shaped cavities through a Y-shaped air passage, and is also connected to the locking hole through a connecting groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are: the battery box quick-locking device can avoid jamming due to overuse, and can quickly lock and unlock, thereby greatly improving the battery swapping efficiency. In addition, it is stable enough after locking, and can prevent loosening due to vibration.

[0020] 1. By setting the spiral through groove, the locking screw can only rotate within a certain range after being threadedly connected to the locking nut. When the pin block slides from the upper end to the lower end of the spiral through groove, it means that the drive rod has rotated 90°. At this time, under the restriction of the spiral through groove, the locking screw can no longer continue to rotate, thus avoiding jamming due to overuse. In addition, it can also improve the efficiency of locking and unlocking, which helps to improve the efficiency of battery swapping.

[0021] 2. By inserting the embedded block into the embedded groove, the locking block can be limited, thereby preventing the locking block from rotating and ensuring the structural stability of the locking device.

[0022] 3. When the drive rod rotates, the paddle connected to it rotates synchronously. When the paddle rotates, it is in close contact with the outer wall of the arc-shaped cavity that does not correspond to it, so it will drive the locking screw with the arc-shaped cavity to rotate synchronously. When the locking screw rotates, it will gradually extend into the locking nut. At the same time, the pin block will move in the spiral groove until the pin block rotates to the lower end of the spiral groove. During this process, the pin block will squeeze the piston rod. After the locking hole aligns with the piston rod, the piston rod will reset and extend into the locking hole. At this time, because the locking hole and the piston rod are engaged, the locking screw can be locked to prevent rotation. This can prevent the locking screw and locking nut from loosening under vibration or other forces after locking.

[0023] 4. During the up-and-down movement of the piston rod, external gas is drawn into the piston chamber through the one-way air inlet and input into the air chamber through the one-way air guide tube, thereby ensuring sufficient air pressure between the safety valve and the chamber rod, thus ensuring the stability of the connection between the embedded block and the embedded groove, which in turn ensures that the locking block will not rotate, thereby ensuring the stability of the locking device structure.

[0024] 5. When the drive rod rotates in the reverse direction, the paddle rotates in the same direction, causing one end of the arc-shaped part to move within the corresponding arc-shaped cavity. This allows the gas in the arc-shaped cavity to be transported to the locking hole through the air passage, air collection chamber, and connecting groove. At this time, the increased air pressure in the locking hole causes the built-in block to move, thus squeezing the piston rod. After the piston rod is completely squeezed out of the locking hole, the drive rod continues to rotate, which will drive the locking screw to rotate in the same direction, thereby unlocking the device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0026] Figure 2 For the present invention Figure 1 Enlarged structural diagram of point A in the middle;

[0027] Figure 3 This is a schematic diagram of the structure of the present invention from a bottom view;

[0028] Figure 4 This is a schematic cross-sectional view of the sleeve structure of the present invention;

[0029] Figure 5 For the present invention Figure 4 Enlarged structural diagram of point B;

[0030] Figure 6 This is a schematic cross-sectional view of the connection between the locking screw and the drive rod of the present invention;

[0031] Figure 7 For the present invention Figure 6 Enlarged structural diagram of point C;

[0032] Figure 8 This is a cross-sectional view of the locking screw structure of the present invention;

[0033] Figure 9 For the present invention Figure 8 Enlarged structural diagram of point D;

[0034] Figure 10 This is a partial cross-sectional view of the locking screw of the present invention;

[0035] Figure 11 For the present invention Figure 10 Enlarged structural diagram of point E in the middle;

[0036] Figure 12 This is a partial cross-sectional view of the sleeve structure of the present invention;

[0037] Figure 13 For the present invention Figure 12 Enlarged structural diagram of point F in the middle;

[0038] Figure 14 This is a schematic cross-sectional view of the lower end of the sleeve of the present invention;

[0039] Figure 15 For the present invention Figure 14 A magnified schematic diagram of the G-point structure;

[0040] Figure 16 This is a schematic diagram of the connection structure between the drive rod and the frame lock hole of the present invention.

[0041] In the diagram: 1. Sleeve; 2. Locking nut; 3. Locking screw; 4. Drive rod; 5. Spiral groove; 6. Pin block; 7. Piston rod; 8. Return spring; 9. Air chamber; 10. Chamber rod; 11. Safety valve; 12. Support tube; 13. Pressure spring; 14. Embedded block; 15. Embedded groove; 16. Locking block; 17. Check block; 18. Arc-shaped cavity; 19. Air passage; 20. Paddle; 21. Arc-shaped component; 22. Air collection chamber; 23. Connecting groove; 24. Locking hole; 25. Internal block; 26. Limiting hole; 27. Limiting rod; 28. One-way air guide tube; 29. ​​Piston chamber; 30. One-way air inlet. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1-16The present invention provides the following technical solution:

[0044] Example 1: To address the problem of jamming easily after excessive use of previous battery box quick-locking devices, the following technical solution is provided: A battery box quick-locking device includes a sleeve 1 and a locking nut 2 installed inside it. The lower end of the locking nut 2 extends below the sleeve 1, and the upper end of the locking nut 2 is provided with a threaded groove. The lower end of a locking screw 3 is movably inserted into the upper end of the sleeve 1. The thread at the lower end of the locking screw 3 matches the thread inside the threaded groove. The upper end of the locking screw 3 is connected to a T-shaped drive rod 4 via a deep groove ball bearing. The outer side of the locking screw 3 is connected to the sleeve 1 via a rotation angle limiting mechanism. A locking block 16 is threadedly installed on the inner side of the lower end of the sleeve 1. The inner side of the upper end of the locking block 16 is an annular inclined surface facing its shaft end, which locks... The upper end of the fixing block 16 is engaged with a check block 17, which is movably sleeved on the outside of the locking nut 2. The inner side of the check block 17 and the outer side of the locking nut 2 are mutually matching regular hexagonal structures. A limit spring is provided between the upper surface of the check block 17 and the upper middle part of the locking nut 2. Both the upper surface of the check block 17 and the upper middle part of the locking nut 2 are provided with limit rings for limiting the limit spring. The limit ring has an L-shaped cross section, and the outer diameter of the limit ring matches the inner diameter of the sleeve 1. Through the two limit rings, the limit spring can be prevented from radially shifting, thereby preventing the check block 17 from jamming with the locking nut 2. The lower end of the sleeve 1 is connected to the locking fixing block 16 through an anti-rotation limit locking mechanism. The anti-rotation limit locking mechanism includes an embedded groove 15 provided at the lower end of the locking fixing block 16.

[0045] The rotation angle limiting mechanism includes two spiral grooves 5 on the sleeve 1, which are symmetrically arranged about the axis of the sleeve 1. The spiral grooves 5 penetrate the inner and outer sides of the sleeve 1. Two pin blocks 6 are fixedly connected to the locking screw 3, which are symmetrically arranged about the axis of the sleeve 1. The pin blocks 6 engage and slide through the corresponding spiral grooves 5. Two embedding grooves 15 are provided at the lower end of the locking block 16, which are symmetrically arranged about the axis of the locking block 16. The anti-rotation limiting locking mechanism also includes two air chambers 9 at the lower end of the sleeve 1, which correspond one-to-one with the embedding grooves 15. A safety valve 11 is installed on the air chamber 9, penetrating to the outside of the sleeve 1. One end of a cavity rod 10 is slidably connected inside the air chamber 9. A support tube 12 is provided on the air chamber 9, which extends to the inside of the sleeve 1. The end of the support tube 12 is movably sleeved on the outside of the cavity rod 10. A pressure spring 13 is installed between one end of the cavity rod 10 and the end of the support tube 12 inside the air cavity 9. An embedded block 14 is coaxially fixedly connected to the end of the support tube 12 outside the air cavity 9. The embedded block 14 engages and slides within a corresponding embedded groove 15. The inner contour of the embedded groove 15 and the outer contour of the embedded block 14 are mutually matching isosceles trapezoids, ensuring stable and tight contact between the outer side of the embedded block 14 and the inner side of the embedded groove 15. The direction of movement of the embedded block 14 is perpendicular to the axial direction of the locking block 16. By rotating the insert block 14 and the insert groove 15, the direction of tightening the locking block 16 and the sleeve 1 is opposite to the direction of the locking screw 3 gradually rotating deeper into the locking nut 2. When the locking screw 3 is gradually connected to the locking nut 2, the rotation of the locking nut 2 can be restricted by the insert block 14, the insert groove 15, the locking block 16 and the check block 17. When the locking screw 3 is gradually disconnected from the locking nut 2, the tightness of the threaded connection between the locking block 16 and the sleeve 1 can be improved.

[0046] according to Figures 1-5 When in use, the locking nut 2 and the locking screw 3 are threadedly connected. When the locking screw 3 rotates, the pin block 6 will also slide in the spiral groove 5.

[0047] During the above process, the thread on the outer side of the locking screw 3 matches the arc length of the spiral groove 5. Since the arc length of the spiral groove 5 is limited, the rotation angle of the locking screw 3 can be limited by the pin block 6, thereby avoiding the problem of insufficient or excessive rotation stroke of the locking screw 3 during overuse, which could lead to jamming.

[0048] In addition, since the spiral groove 5 can limit the rotation angle of the locking screw 3, it can lock and unlock quickly, thereby improving the battery swapping efficiency of new energy vehicles.

[0049] Example 2: To solve the problem that the connection between the locking nut 2 and the locking screw 3 cannot be prevented from loosening due to vibration in the previous quick locking device for the battery box, the following technical solution is provided: Specifically, an anti-reverse limiting mechanism is provided at the lower end of the spiral groove 5, and the anti-reverse limiting mechanism includes a piston chamber 29 provided in the sleeve 1.

[0050] The piston end of the piston rod 7 is slidably connected inside the piston chamber 29. The rod end of the piston rod 7 extends movably to the lower end of the spiral groove 5. An annular limiting plate is provided on the rod end of the piston rod 7. A return spring 8 is movably sleeved on the outside of the rod end of the piston rod 7 between the annular limiting plate and the lower end of the corresponding spiral groove 5. The piston chamber 29 is connected to the gas chamber 9 through a one-way gas guide pipe 28. A one-way valve is installed at the connection between the one-way gas guide pipe 28 and the piston chamber 29. The structure formed by the one-way gas guide pipe 28 and the one-way valve allows gas to flow only unidirectionally from the piston chamber 29 to the gas chamber 9. The piston chamber 29 extends to the outside of the sleeve 1 through a one-way air inlet 30. A one-way air inlet 30 is also installed at the connection between the piston chamber 29 and the one-way air inlet 30. A one-way valve with a one-way inlet 30 allows gas to flow only from the external environment to the piston chamber 29. A locking hole 24 is provided on the pin block 6, and a limit rod 27 is provided at the inner top of the locking hole 24. An internal block 25 is slidably connected inside the locking hole 24. The outer surface of the internal block 25 is hard chrome plated to reduce the coefficient of friction. A limit hole 26 corresponding to the limit rod 27 is provided on the upper surface of the internal block 25. The limit rod 27 and the corresponding limit hole 26 are nested and slidably connected. The gap between the limit hole 26 and the limit rod 27 is between 0.005mm and 0.01mm to ensure smooth movement of the internal block 25 within the locking hole 24 and to prevent jamming during movement. The fixed hole 24 is set one-to-one with the piston rod 7. The inner diameter of the locking hole 24 matches the outer diameter of the upper end of the piston rod 7. The upper end of the locking screw 3 is provided with an arc-shaped cavity 18. There are two arc-shaped cavities 18, which are symmetrically arranged about the axis of the sleeve 1. One end of the arc-shaped component 21 is slidably connected in each arc-shaped cavity 18. The lower end of the drive rod 4 is fixedly connected to the outer side of the lever 20. There are two levers 20, which are symmetrically arranged about the axis of the drive rod 4. The arc-shaped component 21 is set one-to-one with the lever 20, and the other end of the arc-shaped component 21 is fixedly connected to the lever 20. The inside of the locking screw 3 is provided with an air collecting chamber 22, which is connected to the Y-shaped air passage 1. 9 is connected to two arc-shaped cavities 18. The gas collecting cavity 22 is also connected to the locking hole 24 through the connecting groove 23. The arc of the arc-shaped cavity 18 and the arc of the structure formed by the lever 20 and the arc-shaped component 21 are both less than 90°. The arc angle of the arc-shaped cavity 18 is greater than the maximum value of the rotation angle of the arc-shaped component 21, ensuring that when the arc-shaped component 21 moves to the limit in the arc-shaped cavity 18, the arc-shaped cavity 18 is still connected to the air passage 19. The thickness of the lever 20 is less than the depth of the indentation at the upper end of the locking screw 3. The inner diameter of the air passage 19 matches the inner diameter of the connecting groove 23, so that when the arc-shaped component 21 rotates, the gas between the arc-shaped cavity 18 and the locking hole 24 flows smoothly through the gas supply structure formed by the air passage 19 and the gas collecting cavity 22.

[0051] according to Figures 4-15 When in use, the drive rod 4 rotates counterclockwise relative to the locking screw 3, and the paddle 20 connected to the drive rod 4 rotates synchronously accordingly;

[0052] When the paddle 20 rotates, it will squeeze the outer wall of the arc cavity 18, which will drive the locking screw 3 to rotate, causing the locking screw 3 to rotate synchronously with the drive rod 4.

[0053] When the locking screw 3 rotates, the locking screw 3 gradually screws into the locking nut 2, and the pin block 6 connected to the locking screw 3 gradually slides on the spiral groove 5;

[0054] When the pin block 6 slides to the lower end of the spiral groove 5, it will first squeeze the piston rod 7, causing the piston rod 7 to move down a certain distance. At the same time, the return spring 8 is compressed. When the locking hole 24 on the pin block 6 is aligned with the position of the piston rod 7, under the reset action of the return spring 8, the piston rod 7 moves up and gets stuck in the locking hole 24.

[0055] At this time, the piston rod 7 is engaged with the locking hole 24 to lock the pin block 6 and prevent it from shifting. This locks the angle of rotation of the locking screw 3 and prevents it from loosening, thereby improving the locking stability of the locking device.

[0056] When unlocking is required, turn the drive lever 4 clockwise. The paddle 20 on it drives the arc-shaped part 21 to move, which causes the end of the arc-shaped part 21 to move gradually into the corresponding arc-shaped cavity 18. During this process, the gas in the arc-shaped cavity 18 will be gradually transported to the gas collection cavity 22 through the air passage 19, and then transported to the locking hole 24 through the connecting groove 23.

[0057] The increased pressure inside the locking hole 24 due to the injection of gas causes the built-in block 25 to move under the guidance of the limiting hole 26 and the limiting rod 27, thereby gradually squeezing the piston rod 7 until the piston rod 7 is squeezed out of the locking hole 24.

[0058] At this time, the arc-shaped part 21 will also move to its limit within the arc-shaped cavity 18, thereby causing the drive rod 4 to continue to rotate clockwise, which can drive the locking screw 3 to rotate synchronously.

[0059] When the locking screw 3 rotates, the pin block 6 connected to it will gradually move upward in the spiral groove 5, thereby causing the locking device to gradually unlock.

[0060] During the above process, the piston rod 7 will be squeezed first, and then reset by the return spring 8;

[0061] When the piston rod 7 moves up and down during the entire process described above, it can deliver external gas to the piston chamber 29 through the one-way air inlet 30 and enter the air chamber 9 through the one-way air guide pipe 28, thereby increasing the air pressure in the air chamber 9 and ensuring that the air pressure between the safety valve 11 and the chamber rod 10 is in a relatively constant range. This ensures that the pressure spring 13 can stably squeeze the support tube 12, which is beneficial for the embedded block 14 to stably squeeze the embedded groove 15.

[0062] The insertion groove 15 is stably pressed by the insertion block 14, thereby preventing the locking block 16 from rotating. In other words, the locking block 16 can be engaged with the check block 17 to restrict the rotation of the check block 17.

[0063] During the entire process described above, after the locking screw 3 rotates to a certain angle, the T-shaped drive rod 4 will be perpendicular or parallel to the frame lock hole. When the T-shaped drive rod 4 is perpendicular to the frame lock hole, locking can be achieved, thereby locking the battery box to the frame. When the T-shaped drive rod 4 is parallel to the frame lock hole, as... Figure 16 The T-shaped drive rod 4 can pass through the frame lock hole, thus enabling unlocking. When the new energy vehicle is swapping batteries at the battery swapping station, i.e., when the chassis is swapped, the existing battery box is generally rectangular with an open interior for placing the battery. The perimeter of the box is equipped with a long-lasting knob quick-locking device. When in use, the long-lasting knob quick-locking device is rotated by the drive rod 4 until it is parallel to the frame lock hole, which allows the battery box to be removed. Then, the fully charged battery box is transported to the battery installation location of the new energy vehicle, and the drive rod 4 of the long-lasting knob quick-locking device on the fully charged battery box passes through the frame lock hole. Then, the drive rod 4 is rotated so that it is perpendicular to the frame lock hole. At this point, the battery box is locked, thus completing the step of installing the fully charged battery box on the new energy vehicle, thereby realizing the battery swapping of the new energy vehicle.

[0064] The locking hole 24 and the built-in block 25, the air chamber 9 and the end of the cavity rod 10 extending into it, the piston chamber 29 and the piston end of the piston rod 7, and the arc-shaped cavity 18 and the end of the arc-shaped component 21 extending into it are all fitted with clearance, with a clearance of 0.02-0.03 mm. Rubber rings are provided on the outer side of the built-in block 25, the end of the cavity rod 10 extending into the air chamber 9, the outer side of the piston end of the piston rod 7, and the end of the arc-shaped component 21 extending into the arc-shaped cavity 18, respectively, to fill the gaps between the locking hole 24 and the built-in block 25, between the air chamber 9 and the end of the cavity rod 10 extending into it, between the piston chamber 29 and the piston end of the piston rod 7, and between the arc-shaped cavity 18 and the end of the arc-shaped component 21 extending into it.

[0065] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-locking device for a battery box, comprising a sleeve (1) and a locking nut (2) installed inside therein, characterized in that: The lower end of the locking nut (2) extends into the lower part of the sleeve (1). The upper end of the locking nut (2) is provided with a threaded groove. The lower end of the locking screw (3) is movably inserted into the upper end of the sleeve (1). The thread at the lower end of the locking screw (3) matches the thread inside the threaded groove. The upper end of the locking screw (3) is connected to a T-shaped drive rod (4) by a bearing. The outer side of the locking screw (3) is connected to the sleeve (1) through a rotation angle limiting mechanism. A locking block (16) is installed on the inner thread of the lower end of the sleeve (1). The inner side of the upper end of the locking block (16) faces the direction of the locking nut (2). The annular inclined surface at the shaft end, the upper end of the locking block (16) is engaged with a check block (17), the check block (17) is movably sleeved on the outside of the locking nut (2), the inner side of the check block (17) and the outer side of the locking nut (2) are mutually matching regular hexagonal structures, a limit spring is provided between the upper surface of the check block (17) and the upper middle part of the locking nut (2), the lower end of the sleeve (1) is connected to the locking block (16) through an anti-rotation limit locking mechanism, the anti-rotation limit locking mechanism includes an embedded groove (15) provided at the lower end of the locking block (16).

2. The battery box quick-locking device according to claim 1, characterized in that: The rotation angle limiting mechanism includes a spiral through groove (5) provided on the sleeve (1). There are two spiral through grooves (5), which are symmetrically arranged about the axis of the sleeve (1). The spiral through groove (5) passes through the inner and outer sides of the sleeve (1). A pin block (6) is fixedly connected to the locking screw (3). There are two pin blocks (6), which are symmetrically arranged about the axis of the sleeve (1). The pin blocks (6) engage and slide through the corresponding spiral through groove (5).

3. The battery box quick-locking device according to claim 2, characterized in that: Two embedding slots (15) are provided at the lower end of the locking block (16), and the two embedding slots (15) are symmetrically arranged about the axis of the locking block (16).

4. A battery box quick-locking device according to claim 3, characterized in that: The anti-rotation limiting locking mechanism also includes an air chamber (9) provided at the lower end of the sleeve (1). There are two air chambers (9), and each air chamber (9) is provided in a corresponding manner with an embedded groove (15). A safety valve (11) is installed on the air chamber (9) and extends to the outside of the sleeve (1). One end of a cavity rod (10) is slidably connected inside the air chamber (9). A support tube (12) is provided on the air chamber (9) and extends movably to the inside of the sleeve (1). The end of the support tube (12) inside the air chamber (9) is movably sleeved on the outside of the other end of the cavity rod (10). A pressure spring (13) is provided between one end of the cavity rod (10) and the end of the support tube (12) inside the air chamber (9). An embedded block (14) is coaxially fixedly connected to the end of the support tube (12) outside the air chamber (9). The embedded block (14) is engaged and slidably inserted into the corresponding embedded groove (15).

5. A battery box quick-locking device according to claim 4, characterized in that: The inner contour of the embedding groove (15) and the outer contour of the embedding block (14) are mutually matching isosceles trapezoids, so that the outer side of the embedding block (14) and the inner side of the embedding groove (15) are in stable and tight contact.

6. A battery box quick-locking device according to claim 5, characterized in that: The lower end of the spiral groove (5) is provided with an anti-reverse limiting mechanism, which includes a piston chamber (29) provided in the sleeve (1).

7. A quick-locking device for a battery box according to claim 6, characterized in that: The piston end of the piston rod (7) is slidably connected in the piston chamber (29). The rod end of the piston rod (7) extends movably to the lower end of the spiral groove (5). An annular limiting piece is provided on the rod end of the piston rod (7). A return spring (8) is movably sleeved on the outside of the rod end of the piston rod (7) between the annular limiting piece and the lower end of the corresponding spiral groove (5). The piston chamber (29) is connected to the air chamber (9) through a one-way air guide pipe (28). The piston chamber (29) is connected to the outside of the sleeve (1) through a one-way air inlet hole (30).

8. A quick-locking device for a battery box according to claim 7, characterized in that: The pin block (6) is provided with a locking hole (24). The upper end of the locking hole (24) is provided with a limit rod (27). The locking hole (24) is slidably connected to the inside of the locking hole (24). The upper surface of the inner block (25) is provided with a limit hole (26) corresponding to the limit rod (27). The limit rod (27) and the corresponding limit hole (26) are nested and slidably connected. The locking hole (24) is provided in a one-to-one correspondence with the piston rod (7). The inner diameter of the locking hole (24) matches the outer diameter of the upper end of the piston rod (7).

9. A quick-locking device for a battery box according to claim 8, characterized in that: The upper end of the locking screw (3) is provided with an arc-shaped cavity (18). There are two arc-shaped cavities (18). The two arc-shaped cavities (18) are symmetrically arranged about the axis of the sleeve (1). One end of an arc-shaped component (21) is slidably connected in each arc-shaped cavity (18). A paddle (20) is fixedly connected to the outer side of the lower end of the drive rod (4). There are two paddles (20). The two paddles (20) are symmetrically arranged about the axis of the drive rod (4). The arc-shaped component (21) and the paddle (20) are arranged in a one-to-one correspondence. The other end of the arc-shaped component (21) is fixedly connected to the paddle (20).

10. A quick-locking device for a battery box according to claim 9, characterized in that: The locking screw (3) has an air collection chamber (22) inside. The air collection chamber (22) is connected to two arc-shaped chambers (18) through a Y-shaped air passage (19). The air collection chamber (22) is also connected to the locking hole (24) through a connecting groove (23).

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