Battery replacement mechanism of power battery pack and new energy vehicle body

Abstract

The application discloses a power battery pack battery replacing mechanism and a new energy vehicle body, wherein the power battery pack battery replacing mechanism comprises a battery outer sleeve, a first elastic check ring, a floating nut, a vehicle body limiting plate, a locking bolt and a locking device, the battery outer sleeve is used for fixing the battery pack, the floating nut comprises a nut body and a first stud at the first end of the nut body in the axial direction, and a threaded hole is arranged at the middle position of the nut body and the first stud. The floating nut has an unlocking position of the nut body passing through the first through hole and a locking position of the nut body being clamped between the limiting convex and the limiting piece, and when the floating nut is located at the locking position, the nut body is abutted against the second side of the base body close to the first elastic check ring. In the battery replacing mechanism provided in the application, the battery pack and the vehicle body are threadedly locked by the floating nut and the locking bolt, and the position tolerance of the whole vehicle is absorbed by the first elastic check ring, and the overall connection is stable, therefore, the reliability of the battery replacing mechanism provided in the application is improved.

Description

Technical Field

[0001] This invention relates to the field of power battery technology, and in particular to a battery swapping mechanism for a power battery pack. This invention also relates to a new energy vehicle body including the aforementioned battery swapping mechanism for a power battery pack. Background Technology

[0002] With the technological advancements in power battery packs for new energy vehicles, the capacity of these packs is continuously increasing. Recharging using traditional methods also leads to longer charging times. To shorten the charging time for electric vehicles and improve user experience, battery swapping can be used to directly replace the power battery pack.

[0003] Traditional power battery pack swapping mechanisms typically use a snap-fit ​​connection method, which uses a mechanical structure to snap the battery to the vehicle body. However, the connection fastening force is uncontrollable, the anti-slip capability is weak, and the reliability of the swapping mechanism is poor.

[0004] Therefore, how to improve the reliability of battery swapping mechanisms is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a battery swapping mechanism for a power battery pack, which improves the reliability of the swapping mechanism. Another purpose of this invention is to provide a new energy vehicle body including the above-mentioned battery swapping mechanism.

[0006] To achieve the above objectives, the present invention provides a battery swapping mechanism for a power battery pack, comprising:

[0007] Battery sleeve for securing the battery pack;

[0008] First elastic retaining ring;

[0009] A floating nut, comprising a nut body and a first stud located at a first end in the axial direction of the nut body, wherein the outer wall of the first stud is provided with a first groove for engaging the inner circumference of the first elastic retaining ring.

[0010] A vehicle body limiting plate for fixing to a vehicle body, the vehicle body limiting plate includes a base body and a limiting member for limiting the outer periphery of the floating nut. The first side of the base body away from the nut body is engaged with the outer periphery of the first elastic retaining ring. The limiting member is connected to the second side of the base body. The base body has a first through hole for the floating nut to pass through. The second side of the base body has a limiting protrusion for limiting the side of the nut body. When the floating nut is in the locked position, the nut body abuts against the second side of the base body away from the first elastic retaining ring. The first side and the second side of the base body are opposite sides.

[0011] A locking bolt, one end of which is threadedly connected to the floating nut, and the other end of which is located inside the battery outer sleeve; the floating nut has an unlocking position that is separate from the locking bolt and a locking position in which the nut body is engaged between the limiting protrusion and the limiting member;

[0012] And a locking device for rotating the locking bolt to separate the locking bolt from the floating nut, wherein the locking device can lock the locking bolt and fix it relative to the battery outer sleeve.

[0013] Optionally, in the battery swapping mechanism of the aforementioned power battery pack, the locking bolt includes a second stud, an operating post, and a limiting platform. The second stud and the operating post are disposed at opposite ends of the limiting platform. The second stud passes through the first side of the battery outer sleeve and is threadedly connected to the floating nut. The nut body and the first stud are provided with threaded holes that are threadedly connected to the second stud. The limiting platform and the operating post are both located inside the battery outer sleeve. The limiting platform can abut against the inner wall of the first end of the battery outer sleeve. The locking device is used to drive the operating post to rotate.

[0014] Optionally, in the battery swapping mechanism of the aforementioned power battery pack, the locking device includes:

[0015] The first sleeve is located inside the battery outer sleeve and is fixed relative to the battery outer sleeve. The first end face of the first sleeve is provided with a first locking tooth, and the first end face of the first sleeve is the end face facing the limiting platform.

[0016] The second sleeve has a first end face provided with a second locking tooth that meshes with the first locking tooth. The second sleeve is engaged with the operating column to drive the operating column to rotate.

[0017] The elastic telescopic component is located inside the battery outer sleeve and is in a compressed state. The telescopic ends on both sides of the elastic telescopic component are respectively connected to the limiting platform and the second sleeve.

[0018] Optionally, in the battery swapping mechanism of the above-mentioned power battery pack, at least one of the first locking teeth and the second locking teeth is arranged in a ring, and the center of the ring-shaped locking teeth coincides with the rotation center of the locking bolt.

[0019] Optionally, in the battery swapping mechanism of the power battery pack described above, the elastic telescopic member is sleeved on the outside of the operating column, and the second end face of the elastic telescopic member on the second sleeve is provided with a support protrusion extending toward the limiting platform. When the elastic telescopic member is compressed to a preset position, the support protrusion abuts against the limiting platform. The first end face and the second end face of the second sleeve are two opposite end faces of the second sleeve.

[0020] Optionally, the battery swapping mechanism of the above-mentioned power battery pack further includes a second elastic retaining ring. One of the battery outer sleeve and the first sleeve is provided with a snap-fit ​​protrusion, and the other is provided with a snap-fit ​​groove for snapping the snap-fit ​​protrusion. The outer ring of the second elastic retaining ring is snapped into the inside of the battery outer sleeve, and the inner ring of the second elastic retaining ring abuts against the second end face of the second sleeve. The first end face and the second end face of the first sleeve are two opposite end faces of the first sleeve.

[0021] Optionally, in the battery swapping mechanism of the power battery pack described above, the inner wall of the second sleeve is provided with a first through hole that matches the bolt head of the operating column to drive the locking bolt to rotate, and the second end face of the second sleeve is provided with a tool mounting position for mounting a tool to drive the second sleeve to rotate.

[0022] Optionally, the battery swapping mechanism of the aforementioned power battery pack also includes a wear-resistant pad, and the limiting platform abuts against the inner wall of the first end of the battery outer sleeve through the wear-resistant pad.

[0023] Optionally, in the battery swapping mechanism of the aforementioned power battery pack, the threaded connection between the locking bolt and the floating nut is provided with grease.

[0024] A new energy vehicle body includes a vehicle body and a battery swapping mechanism for a power battery pack, wherein the battery swapping mechanism is any of the battery swapping mechanisms described above.

[0025] In the above technical solution, the battery swapping mechanism of the power battery pack provided by the present invention includes a battery outer sleeve, a first elastic retaining ring, a floating nut, a vehicle body limiting plate, a locking bolt, and a locking device. The battery outer sleeve is used to fix the battery pack. The floating nut includes a nut body and a first stud located at a first end in the axial direction of the nut body. The outer wall of the first stud is provided with a first groove for engaging the inner circumference of the first elastic retaining ring. The vehicle body limiting plate is used to fix the vehicle body. The vehicle body limiting plate includes a base body and a limiting member that limits the outer circumference of the floating nut. The base body is engaged with the outer circumference of the first elastic retaining ring on a first side away from the nut body. The locating element is connected to the second side of the base body. When the floating nut is in the locked position, the nut body abuts against the second side of the base body away from the first elastic retaining ring. The first and second sides of the base body are opposite sides. The base body has a first through hole for the floating nut to pass through. The second side of the base body has a limiting protrusion that limits the side of the nut body. The floating nut has an unlocking position that separates from the locking bolt and a locking position where the nut body is engaged between the limiting protrusion and the locating element. When the floating nut is in the locked position, the nut body abuts against the second side of the base body near the first elastic retaining ring. One end of the locking bolt is threaded to the floating nut, and the other end is located inside the battery outer sleeve. The locking device is used to drive the locking bolt to rotate, thereby separating the locking bolt from the floating nut. The locking device can lock the locking bolt and fix it relative to the battery outer sleeve.

[0026] As can be seen from the above description, in the battery swapping mechanism provided in this application, the battery pack and the vehicle body are locked together by floating nuts and locking bolts, and the positional tolerance of the whole vehicle is absorbed by the first elastic retaining ring, so the overall connection is stable. Therefore, the reliability of the battery swapping mechanism provided in this application is improved. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of the battery swapping mechanism provided in an embodiment of the present invention;

[0029] Figure 2 This is an exploded view of the battery swapping mechanism provided in an embodiment of the present invention;

[0030] Figure 3 This is a structural diagram showing the position of the floating nut in the unlocked position according to an embodiment of the present invention;

[0031] Figure 4This is a structural diagram showing the position of the floating nut in the locked position according to an embodiment of the present invention;

[0032] Figure 5 This is a structural diagram showing the threaded connection position of the floating nut and the locking bolt in the battery swapping mechanism provided in an embodiment of the present invention;

[0033] Figure 6 This is a structural diagram showing the loosened position of the floating nut and locking bolt in the battery swapping mechanism provided in an embodiment of the present invention;

[0034] Figure 7 This is a three-dimensional structural diagram of the floating nut provided in an embodiment of the present invention.

[0035] in Figure 1 , 7 middle:

[0036] 1. Vehicle body limiting plate; 1-1. Limiting component; 1-1-1. First limiting structure; 1-1-2. Second limiting structure; 1-2. Base body; 1-2-1. First through hole; 1-2-2. Limiting protrusion;

[0037] 2. Floating nut; 2-1. Nut body; 2-2. First stud; 2-3. First slot;

[0038] 3. First elastic retaining ring;

[0039] 4. Locking bolt; 4-1. Second stud; 4-2. Limiting platform; 4-3. Connecting post;

[0040] 5. Battery outer sleeve;

[0041] 6. Vehicle body;

[0042] 7. Wear-resistant gaskets;

[0043] 8. Elastic expansion joints;

[0044] 9. Second sleeve; 9-1. Second locking tooth;

[0045] 10. First sleeve; 10-1. First locking tooth; 10-2. Snap-fit ​​protrusion;

[0046] 11. Second elastic retaining ring. Detailed Implementation

[0047] The core of this invention is to provide a battery swapping mechanism for a power battery pack, which improves the reliability of the swapping mechanism. Another core aspect of this invention is to provide a new energy vehicle body that includes the aforementioned battery swapping mechanism.

[0048] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0049] Please refer to Figures 1 to 7 .

[0050] In one specific embodiment, the battery swapping mechanism of the power battery pack provided by this invention includes a battery outer sleeve 5, a first elastic retaining ring 3, a floating nut 2, a vehicle body limiting plate 1, a locking bolt 4, and a locking device. The floating nut 2 and the first elastic retaining ring 3 are detachably mounted on the vehicle body limiting plate 1.

[0051] The battery sleeve 5 is used to fix the battery pack. Specifically, after assembly, the battery sleeve 5 and the vehicle body limiting plate 1 are located on opposite sides of the vehicle body, and the first end of the battery sleeve 5 abuts against the side of the vehicle body 6 away from the vehicle body limiting plate 1.

[0052] The floating nut 2 includes a nut body 2-1 and a first stud 2-2 located at the first end of the nut body 2-1 along its axial direction. Preferably, the nut body 2-1 and the first stud 2-2 have threaded holes inside, which can be through holes. The outer wall of the first stud 2-2 has a first groove 2-3 for engaging the inner circumference of the first elastic retaining ring 3. Specifically, the threaded holes on the floating nut 2 can be through holes. Preferably, the nut body 2-1 has an elongated irregular shape; however, the nut body 2-1 can also be elliptical along its axial direction.

[0053] The vehicle body limiting plate 1 is used to fix the vehicle body 6. Specifically, the vehicle body limiting plate 1 and the vehicle body 6 can be connected by welding or screwing. The vehicle body limiting plate 1 includes a base body 1-2 and a limiting member 1-1 on the outer periphery of the limiting floating nut 2. The base body 1-2 and the limiting member 1-1 are fixed to each other. Specifically, the base body 1-2 and the limiting member 1-1 are connected by welding or screwing. The base body 1-2 serves to fix and support the load and restrict the rotation of the floating nut 2.

[0054] The base body 1-2 is engaged with the outer periphery of the first elastic retaining ring 3 on the first side away from the nut body 2-1, and the limiting member 1-1 is connected to the second side of the base body 1-2. The first side and the second side of the base body 1-2 are opposite sides. Preferably, the base body 1-2 is provided with a first through hole 1-2-1 for the floating nut 2 to pass through, and the second side of the base body 1-2 is provided with a limiting protrusion 1-2-2 that limits the side of the nut body 2-1. The floating nut 2 has an unlocking position that is separated from the locking bolt 4 and a locking position in which the nut body 2-1 is engaged between the limiting protrusion 1-2-2 and the limiting member 1-1. When the floating nut 2 is in the locking position, the nut body 2-1 abuts against the second side of the base body 1-2 away from the first elastic retaining ring 3. The first through hole 1-2-1 can ensure that the floating nut 2 passes through the base body 1-2, and the limiting member 1-1 can restrict the rotation of the floating nut 2. That is, the nut body 2-1 is axially limited by the first elastic retaining ring 3 and the base body 1-2.

[0055] Specifically, the limiting component 1-1 includes a first limiting structure 1-1-1 and a second limiting structure 1-1-2, wherein the first limiting structure 1-1-1 and the second limiting structure 1-1-2 can be different components or different sides of the same component. Specifically, the side of the first limiting structure 1-1-1 and the second limiting structure 1-1-2 away from the base body 1-2 is connected by a connector, specifically, the connector limits the floating nut 2.

[0056] Before installing floating nut 2, as follows Figure 2 As shown, when the floating nut 2 is passed through the first through hole 1-2-1, the floating nut 2 is rotated until it contacts the limiting member 1-1. Then, the first elastic retaining ring 3 is fixed on the first slot 2-3 of the floating nut 2. At this time, the floating nut 2 and the first elastic retaining ring 3 clamp the base body 1-2, restricting the Z-direction movement of the floating nut 2. Its Z-direction floating amount is less than the height of the limiting protrusion 1-2-2. Therefore, under the restriction of the limiting protrusion 1-2-2 and the limiting member 1-1, the floating nut 2 is fixed to the vehicle body limiting plate 1 and can float in the X / Y direction but will not detach from the vehicle body limiting plate 1. The Z direction is the axial direction of the floating nut 2, and the X and Y directions are perpendicular and both perpendicular to the Z direction.

[0057] One end of the locking bolt 4 is threadedly connected to the floating nut 2, and the other end is located inside the battery outer sleeve 5.

[0058] The locking device is used to drive the locking bolt 4 to rotate, so that the locking bolt 4 is separated from the floating nut 2. The locking device can lock the locking bolt 4 and fix it relative to the battery outer sleeve 5.

[0059] As can be seen from the above description, in the battery swapping mechanism provided in the specific embodiment of this application, the battery pack and the vehicle body 6 are locked together by the floating nut 2 and the locking bolt 4, and the positional tolerance of the whole vehicle is absorbed by the first elastic retaining ring 3, so the overall connection is stable. Therefore, the reliability of the battery swapping mechanism provided in this application is improved.

[0060] The battery outer sleeve 5 has a through hole and a cavity. The locking bolt 4 can pass through the through hole of the outer sleeve and connect with the floating nut 2, thereby fixing the power battery pack to the vehicle body 6.

[0061] In one specific embodiment, the locking bolt 4 includes a second stud 4-1, an operating post 4-3, and a limiting platform 4-2. The second stud 4-1 and the operating post 4-3 are located at opposite ends of the limiting platform 4-2. The second stud 4-1 passes through the first side of the battery outer sleeve 5 and is threadedly connected to the floating nut 2. The nut body 2-1 and the first stud 2-2 have threaded holes inside that are threadedly connected to the second stud 4-1. The limiting platform 4-2 and the operating post 4-3 are both located inside the battery outer sleeve 5. The limiting platform 4-2 can abut against the inner wall of the first end of the battery outer sleeve 5. When the floating nut 2 is in the locked position, the nut body 2-1 abuts against the second side of the base body 1-2 near the first elastic retaining ring 3. The locking device is used to drive the operating post 4-3 to rotate. Preferably, the locking bolt 4 is an integrally formed structure, and the limiting platform 4-2 is preferably a ring structure sleeved on the second stud 4-1.

[0062] In one specific embodiment, the locking device includes a first sleeve 10, an elastic telescopic member 8, and a second sleeve 9. The first sleeve 10 is located inside the battery outer sleeve 5 and is fixed relative to the battery outer sleeve 5. The first end face of the first sleeve 10 is provided with a first locking tooth 10-1, wherein the first end face of the first sleeve 10 is the end face directly opposite the limiting platform 4-2. Specifically, the second sleeve 9 is located inside the battery outer sleeve 5 and between the first sleeve 10 and the limiting platform 4-2. The first end face of the second sleeve 9 is provided with a second locking tooth 9-1 that meshes with the first locking tooth 10-1. The second sleeve 9 is engaged with the operating column 4-3 to drive the operating column 4-3 to rotate. For ease of engagement, preferably, at least one of the first locking tooth 10-1 and the second locking tooth 9-1 is arranged in a ring, and the center of the ring-shaped locking tooth coincides with the rotation center of the locking bolt 4. When the first locking tooth 10-1 and the second locking tooth 9-1 are engaged, they cannot rotate relative to each other. When the first locking tooth 10-1 and the second locking tooth 9-1 are disengaged, they can rotate relative to each other.

[0063] The elastic telescopic component 8 is located inside the battery outer sleeve 5 and is in a compressed state. The telescopic ends on both sides of the elastic telescopic component 8 are connected to the limiting platform 4-2 and the second sleeve 9, respectively. Preferably, the elastic telescopic component 8 is a spring. The elastic telescopic component 8 is installed between the limiting platform 4-2 and the second sleeve 9 to ensure that the second locking tooth 9-1 of the second sleeve 9 engages with the first locking tooth 10-1 of the first sleeve 10 under the action of the elastic force of the elastic telescopic component 8.

[0064] To extend the service life of the elastic telescopic component 8, preferably, the elastic telescopic component 8 is sleeved on the outside of the operating column 4-3, and the second end face of the elastic telescopic component 8 on the second sleeve 9 is provided with a support protrusion extending towards the limiting platform 4-2. When the elastic telescopic component 8 is compressed to the preset position, the support protrusion abuts against the limiting platform 4-2. The first end face and the second end face of the second sleeve 9 are two opposite end faces of the second sleeve 9.

[0065] In one specific embodiment, the battery swapping mechanism of the power battery pack further includes a second elastic retaining ring 11. One of the battery outer sleeve 5 and the first sleeve 10 is provided with a snap-fit ​​protrusion 10-2, and the other is provided with a snap-fit ​​groove for snapping the snap-fit ​​protrusion 10-2. Specifically, the outer ring of the second elastic retaining ring 11 is snapped into the inside of the battery outer sleeve 5, and the inner ring of the second elastic retaining ring 11 abuts against the second end face of the second sleeve 9. The first end face and the second end face of the first sleeve 10 are two opposite end faces of the first sleeve 10.

[0066] The battery outer sleeve 5 and the first sleeve 10 are connected by a keyway to ensure that the first sleeve 10 cannot rotate. Specifically, a snap-fit ​​groove is located on the battery outer sleeve 5, and the snap-fit ​​groove is used to engage the second elastic retaining ring 11. The second elastic retaining ring 11 engages with the snap-fit ​​groove to prevent the elastic telescopic member 8, the first sleeve 10 and the second sleeve 9 from disengaging from the battery outer sleeve 5.

[0067] For ease of operation, preferably, the inner wall of the second sleeve 9 is provided with a first through hole 1-2-1 that matches the bolt head of the operating column 4-3, so as to drive the locking bolt 4 to rotate. The second end face of the second sleeve 9 is provided with a tool mounting position for mounting a tool to drive the second sleeve 9 to rotate. Specifically, the bolt head and the second stud 4-1 are located on opposite sides of the limiting platform 4-2. The cross-section of the bolt head can be a regular square or a regular hexagon or other irregular structure.

[0068] The battery swapping mechanism of the power battery pack also includes a wear-resistant pad 7. The limiting platform 4-2 abuts against the inner wall of the first end of the battery outer sleeve 5 through the wear-resistant pad 7. Preferably, the wear-resistant pad 7 is sleeved on the outside of the second stud 4-1. The second stud 4-1 passes through the battery outer sleeve 5 and the wear-resistant pad 7 and is threadedly connected to the floating nut 2. The wear-resistant pad 7 is located between the limiting platform 4-2 and the mounting surface of the battery outer sleeve 5.

[0069] Preferably, the wear-resistant gasket 7 can be a graphite copper-based gasket or a copper gasket to reduce the wear of the flange surface. Adding the wear-resistant gasket 7 between the mounting surfaces of the limiting platform 4-2 and the battery outer sleeve 5 can slow down the wear of the mounting surfaces and the limiting platform 4-2, and further increase the number of repeated disassembly and assembly cycles of the battery swapping mechanism.

[0070] In terms of the above-mentioned technical solutions, it is preferable that grease is applied to the threaded connection between the locking bolt 4 and the floating nut 2. Specifically, applying grease to the threaded joint of the floating nut 2 and the locking bolt 4 reduces wear caused by repeated tightening of the threaded joint, and at the same time reduces the thread friction coefficient, thereby increasing the tightening force of the battery swapping mechanism and effectively increasing the number of repeated disassembly and assembly cycles of the battery swapping mechanism.

[0071] The bolt head of this application is mechanically locked by a locking device, which can effectively avoid the decrease in self-locking ability caused by repeated disassembly and assembly due to thread wear, as well as the decrease in bolt anti-slip ability caused by adding grease and wear-resistant gasket 7.

[0072] During assembly, the elastic telescopic component 8, the second sleeve 9, the first sleeve 10, and the second elastic retaining ring 11 are sequentially installed in the cavity of the battery outer sleeve 5. The first sleeve 10 and the second sleeve 9 are used to transmit torque and prevent the locking bolt 4 from loosening. The second sleeve 9 is fitted with the inner and outer hexagonal joints of the bolt head of the locking bolt 4, which can drive the locking bolt 4 to rotate.

[0073] The application uses a floating nut 2 and a first elastic retaining ring 3 to connect the six ends of the vehicle body. This not only ensures that the floating nut 2 can float to absorb the positional tolerance of the entire vehicle and is easy to install, but also allows the floating nut 2 to be directly removed from the bottom when the threads of the floating nut 2 are worn, without the need to remove other parts, making replacement convenient. At the same time, the parts are compact and small in size, which is more conducive to layout.

[0074] In practical use, under normal circumstances, the locking bolt 4 engages with the external hexagonal joint inside the second sleeve 9. Under the elastic force of the elastic telescopic member 8, the first locking teeth 10-1 and 9-1 of the first sleeve 10 and the second sleeve 9 mesh with each other. The first sleeve 10 engages with the keyway of the battery outer sleeve 5, ultimately preventing the locking bolt 4 from rotating relative to the battery outer sleeve 5. At this time, the battery swapping mechanism is in a locked state. When rotation is required, the external tooling overcomes the elastic force of the elastic telescopic member 8, lifting the second sleeve 9 and disengaging it from the first locking teeth 10-1 and 9-1 of the first sleeve 10. Rotating the second sleeve 9 then drives the locking bolt 4 to rotate, at which point the battery swapping mechanism is in an unlocked state. After removing the external tooling, under the action of the elastic force, the first locking teeth 10-1 of the second sleeve 9 re-engage with the second locking teeth 9-1 of the first sleeve 10, automatically switching back to the locked state.

[0075] In summary, this application achieves switching between the engagement state of the first sleeve 10 and the second sleeve 9 by cooperating with the external tooling and the second sleeve 9, thus enabling the battery swapping mechanism to switch between locked and unlocked states. Specifically, when switched to the unlocked state, the locking bolt 4 can rotate clockwise to engage with the floating nut 2 installed on the vehicle body 6 for tightening. Reversing the rotation allows the locking bolt 4 to gradually disengage from the floating nut 2. During disengagement, as the locking bolt 4 moves downward, the elastic telescopic member 8 continuously compresses. When the locking bolt 4 is completely disengaged from the floating nut 2, as... Figure 6 As shown, when the power battery pack begins to detach from the vehicle, the locking bolt 4 moves upward again under the action of the elastic telescopic component 8 until it fits against the battery outer sleeve 5. The locking bolt 4 will not protrude outside the battery swapping mechanism, thus preventing the bolt head at the bottom of the locking bolt 4 from protruding out of the power battery outer sleeve 5 after detachment from the vehicle, thereby reducing the overall enclosure and saving space.

[0076] This application provides a new energy vehicle body, including a vehicle body 6 and a battery swapping mechanism for a power battery pack, wherein the battery swapping mechanism is any of the aforementioned battery swapping mechanisms. The specific structure of the battery swapping mechanism has been described above; this application includes the aforementioned battery swapping mechanism and also achieves the aforementioned technical effects.

[0077] The terms "first" and "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may include steps or units not listed, but rather steps or units not listed.

[0078] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power battery pack battery swapping mechanism, characterized in that, include: Battery outer sleeve (5) for securing to the battery pack; First elastic retaining ring (3); A floating nut (2) includes a nut body (2-1) and a first stud (2-2) located at the first end of the nut body (2-1) along the axial direction. The outer wall of the first stud (2-2) is provided with a first groove (2-3) for engaging the inner circumference of the first elastic retaining ring (3). A body limiting plate (1) for fixing to the vehicle body (6), the body limiting plate (1) includes a base body (1-2) and a limiting member (1-1) for limiting the outer periphery of the floating nut (2). The base body (1-2) is engaged with the outer periphery of the first elastic retaining ring (3) on the first side away from the nut body (2-1). The limiting member (1-1) is connected to the second side of the base body (1-2). The base body (1-2) is provided with a spacer for the floating nut (6). 2) Through the first through hole (1-2-1), the second side of the base body (1-2) is provided with a limiting protrusion (1-2-2) that limits the side of the nut body (2-1). When the floating nut (2) is in the locked position, the nut body (2-1) abuts against the second side of the base body (1-2) away from the first elastic retaining ring (3). The first side of the base body (1-2) and the second side of the base body (1-2) are opposite sides. A locking bolt (4) is provided, one end of which is threadedly connected to the floating nut (2), and the other end is located inside the battery outer sleeve (5); the floating nut (2) has an unlocking position that is separated from the locking bolt and a locking position in which the nut body (2-1) is engaged between the limiting protrusion (1-2-2) and the limiting member (1-1); And a locking device for rotating the locking bolt (4) to separate the locking bolt (4) from the floating nut (2), the locking device being able to lock the locking bolt (4) and fix it relative to the battery outer sleeve (5).

2. The power battery pack battery swapping mechanism according to claim 1, characterized in that, The locking bolt (4) includes a second stud (4-1), an operating pin (4-3), and a limiting platform (4-2). The second stud (4-1) and the operating pin (4-3) are located at opposite ends of the limiting platform (4-2). The second stud (4-1) passes through the first side of the battery outer sleeve (5) and is threadedly connected to the floating nut (2). The nut body (2-1) and the first stud (2-2) are provided with threaded holes that are threadedly connected to the second stud (4-1). The limiting platform (4-2) and the operating pin (4-3) are both located inside the battery outer sleeve (5). The limiting platform (4-2) can abut against the inner wall of the first end of the battery outer sleeve (5). The locking device is used to drive the operating pin (4-3) to rotate.

3. The power battery pack battery swapping mechanism according to claim 2, characterized in that, The locking device includes: The first sleeve (10) is located inside the battery outer sleeve (5) and is fixed relative to the battery outer sleeve (5). The first end face of the first sleeve (10) is provided with a first locking tooth (10-1). The first end face of the first sleeve (10) is the end face that is directly opposite to the limiting platform (4-2). The second sleeve (9) has a second locking tooth (9-1) on its first end face that meshes with the first locking tooth (10-1). The second sleeve (9) is engaged with the operating column (4-3) to drive the operating column (4-3) to rotate. And an elastic telescopic member (8), the elastic telescopic member (8) is located inside the battery outer sleeve (5) and is in a compressed state, and the telescopic ends on both sides of the elastic telescopic member (8) are respectively connected to the limiting platform (4-2) and the second sleeve (9).

4. The power battery pack battery swapping mechanism according to claim 3, characterized in that, At least one of the first locking tooth (10-1) and the second locking tooth (9-1) is arranged in a ring, and the center of the ring-shaped locking tooth coincides with the rotation center of the locking bolt (4).

5. The power battery pack battery swapping mechanism according to claim 3, characterized in that, The elastic telescopic member (8) is sleeved on the outside of the operating column (4-3). The second end face of the elastic telescopic member (8) on the second sleeve (9) is provided with a support protrusion extending towards the limiting platform (4-2). When the elastic telescopic member (8) is compressed to a preset position, the support protrusion abuts against the limiting platform (4-2). The first end face and the second end face of the second sleeve (9) are two opposite end faces of the second sleeve (9).

6. The power battery pack battery swapping mechanism according to claim 3, characterized in that, It also includes a second elastic retaining ring (11). One of the battery outer sleeve (5) and the first sleeve (10) is provided with a snap-fit ​​protrusion (10-2), and the other is provided with a snap-fit ​​groove for snapping the snap-fit ​​protrusion (10-2). The outer ring of the second elastic retaining ring (11) is snapped into the inside of the battery outer sleeve (5), and the inner ring of the second elastic retaining ring (11) abuts against the second end face of the second sleeve (9). The first end face and the second end face of the first sleeve (10) are two opposite end faces of the first sleeve (10).

7. The power battery pack battery swapping mechanism according to claim 3, characterized in that, The inner wall of the second sleeve (9) is provided with a first through hole (1-2-1) that is adapted to the bolt head of the operating column (4-3) to drive the locking bolt (4) to rotate. The second end face of the second sleeve (9) is provided with a tool mounting position for installing a tool to drive the second sleeve (9) to rotate.

8. The power battery pack battery swapping mechanism according to claim 3, characterized in that, It also includes a wear-resistant pad (7), and the limiting platform (4-2) abuts against the inner wall of the first end of the battery outer sleeve (5) through the wear-resistant pad (7).

9. The battery swapping mechanism of the power battery pack according to any one of claims 1-8, characterized in that, The locking bolt (4) and the floating nut (2) are connected by threads with grease.

10. A new energy vehicle body, comprising a vehicle body (6) and a power battery pack battery replacement mechanism, characterized in that, The battery swapping mechanism is the same as any one of claims 1-9.

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