Power battery locking assembly and new energy vehicle

Abstract

The invention relates to the technical field of vehicle battery replacement, in particular to a power battery locking assembly and a new energy vehicle. According to the locking assembly, in a first locking unit, a first fixing shaft is rotationally connected with a rotating part. A containing groove and a locking groove are formed in the rotating part. The rotating axis of the rotating part is parallel to the opening direction of the containing groove. An opening of the containing groove is long-strip-shaped. The first locking unit is provided with a first abutting face. The first abutting face extends into the containing groove and the locking groove. The rotating axis of the rotating part intersects with the first abutting face. The rotating part is provided with a second abutting face located in the locking groove. The rotating axis of the rotating part intersects with the extending face of the second abutting face, and the included angle is an acute angle. The distance between the first abutting face and the second abutting face is gradually increased or decreased in the circumferential direction of the first fixing shaft. In the second locking unit, a spring bolt protrudes out of the circumferential surface of one end of the second fixing shaft. And the cross section of the spring bolt is a wedge-shaped surface. Therefore, the problem of how to change the battery in a limited chassis battery change height space is solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle battery replacement technology, and in particular to a power battery locking assembly and a new energy vehicle. Background Art

[0002] At present, new energy vehicles are mainly powered by electricity, and the energy replenishment methods of new energy vehicles generally include battery replacement mode and charging mode. The battery replacement mode can realize the separation of vehicle and battery, which can solve the problem of long charging time. At this stage, the main battery replacement methods on the market are chassis battery replacement, front cabin / rear battery replacement and side panel battery replacement. Among them, chassis battery replacement refers to the method of removing the original battery pack from the lower part of the chassis and replacing it with a new battery pack. Since battery replacement vehicles need to perform battery replacement frequently, a locking mechanism is set between the battery pack and the chassis during the battery replacement process. The locking mechanism is driven by the battery replacement equipment to lock or separate the battery pack from the chassis. Compared with the other two methods, chassis battery replacement is easier to implement, takes less time to replace the battery, has a high degree of automation, does not occupy the vehicle's use space, and does not affect the shape of the entire vehicle. It is currently a more feasible solution.

[0003] However, the height space for battery replacement between the vehicle chassis and the flat ground is limited, and the height of the conventional locking mechanism often exceeds the height range of battery replacement between the vehicle chassis and the flat ground. The existing chassis battery replacement method is to lift the vehicle by a portable ramp or tire jack or dig a trench at the battery replacement location of the battery replacement station, and then use a battery replacement cart to replace the battery at the bottom of the vehicle body. The above method increases the construction cost of the battery replacement station, and there are restrictions on the battery replacement site, which makes it difficult to meet the needs of car owners for fast and efficient battery replacement anytime, anywhere. Summary of the invention

[0004] In order to solve the problem of how to replace batteries in a limited chassis battery replacement height space, the present invention provides a power battery locking assembly and a new energy vehicle.

[0005] In a first aspect, the present invention provides a power battery locking assembly, the power battery locking assembly comprising: The first locking unit, the first locking unit comprising a first fixed axis and a rotating part; the first fixed axis is rotatably connected to the rotating part; the first fixed axis is used to be detachably connected to the chassis of the vehicle; the rotating part is provided with a receiving groove and a locking groove with openings intersecting in an intersecting direction; the axis of rotation of the rotating part is parallel to the opening direction of the receiving groove; the receiving groove is located at the center of rotation of the rotating part; the opening of the receiving groove is elongated; the locking groove is connected to the receiving groove; the first locking unit has a first contact surface; the first contact surface extends into the receiving groove and the locking groove; the axis of rotation of the rotating part intersects with the first contact surface; the rotating part has a second contact surface; the second contact surface is located in the locking groove; the axis of rotation of the rotating part intersects with the extension surface of the second contact surface and the angle is an acute angle; the distance between the first contact surface and the second contact surface gradually increases or decreases along the circumferential direction around the first fixed axis; A second locking unit, the second locking unit comprising a second fixed shaft and a locking tongue; the locking tongue is fixedly connected to one end of the second fixed shaft; the locking tongue protrudes from the circumferential surface of the second fixed shaft; the locking tongue has a first locking surface and a second locking surface which are opposite to each other; the angle between the second locking surface and the axis of the second fixed shaft is an acute angle; the distance between the first locking surface and the second locking surface gradually increases or decreases along the circumference of the second fixed shaft; Wherein, the power battery locking assembly has a locked state and an unlocked state; In the locked state, the second fixed shaft is inserted into the receiving groove, the locking tongue is located in the locking groove, the first locking surface is in contact with the first contact surface, and the second locking surface is in contact with the second contact surface; In the unlocked state, the first locking unit is separated from the second locking unit.

[0006] In some embodiments, the first locking unit further includes a driving part; the driving part includes a gear; the gear is integrally formed with the rotating part or is fixedly connected; and the outer diameter of the gear is equal to the outer diameter of the rotating part.

[0007] In some embodiments, the gear is an incomplete gear; the locking groove and the projection of the gear on an end face of the rotating portion along its own axial direction are staggered.

[0008] In some embodiments, two locking tongues are arranged opposite to each other; the gear includes two incomplete gears; in the locked state, the projections of the two locking tongues and the two incomplete gears on the end face of one end of the rotating part along its own axial direction are staggered.

[0009] In some embodiments, the locking tongue corresponds to the second contact surface one by one; the angle between the second contact surface and the axis of the first fixed shaft is a first inclination angle; the angle between the second locking surface of the locking tongue and the axis of the second fixed shaft is a second inclination angle; the first inclination angle of the second contact surface is equal to the corresponding second inclination angle of the locking tongue; The first inclination angles corresponding to the two second contact surfaces have a difference.

[0010] In some embodiments, the spacing between the second contact surface and the teeth of the incomplete gear is a first spacing; and the first spacing is negatively correlated with the first inclination angle.

[0011] In some embodiments, an opening width of the accommodating groove is greater than a diameter of the second fixing shaft.

[0012] In a second aspect, the present invention provides a new energy vehicle, the new energy vehicle comprising a power battery locking assembly as described in any one of the above embodiments; the new energy vehicle further comprises: Car body; A chassis, wherein the chassis is detachably connected to the vehicle body; the first fixed shaft of the power battery locking assembly is detachably connected to the chassis; A wheel, the wheel being rotatably connected to the chassis; Power battery box; the second fixed shaft of the power battery locking assembly is detachably connected to the power battery box.

[0013] In some embodiments, two locking tongues of the power battery locking assembly are arranged opposite to each other; the arrangement direction of the two locking tongues is perpendicular to the driving direction of the vehicle.

[0014] In some embodiments, the locking tongue corresponds to the second contact surface one by one; the angle between the second contact surface and the axis of the first fixed shaft is a first inclination angle; the angle between the second locking surface of the locking tongue and the axis of the second fixed shaft is a second inclination angle; the first inclination angle of the second contact surface is equal to the corresponding second inclination angle of the locking tongue; The second inclination angle of the locking tongue close to the outer side of the vehicle body is smaller than the second inclination angle of the locking tongue close to the inner side of the vehicle body.

[0015] In order to solve the problem of how to replace the battery in the limited chassis height space, the present invention has the following advantages: The vehicle chassis is rotatably connected to the rotating part through the first fixed shaft. The rotating part is arranged on the side close to the chassis, and the height space restriction is small, thereby avoiding the need to dig trenches for the battery swap station and reducing the construction cost of the battery swap station. Compared with the use of multiple screws to fix the power battery, the screws are prone to stripping after a long period of use, and regular replacement increases maintenance costs. In the present invention, the locking tongue is engaged with the locking groove of the rotating part, and the locking tongue and the locking groove are wedge-shaped bodies that cooperate with each other, and have a long service life. The axial displacement of the second fixed shaft is limited by the abutment and fit of the first contact surface and the first locking surface, and the radial displacement of the second fixed shaft is limited by the abutment of the second contact surface, that is, the inclined groove surface of the locking groove and the second locking surface of the locking tongue. The end of the second fixed shaft away from the locking tongue can be detachably connected to the power battery, thereby achieving locking and fixation of the power battery, and the maintenance cost is low. The processing errors of the chassis and the battery box frame of the power battery are large, and the number of locking mechanisms is large. The locking distance of the locking assembly requires a certain amount of redundancy. According to different processing errors, the tightening force of the wedge surface between the lock tongue and the locking groove can be different, thereby improving the stability of the fixed power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a power battery locking assembly according to an embodiment of the present invention is shown in a first viewing angle; Figure 2 Shows Figure 1 A schematic diagram of the power battery locking assembly in the embodiment at a second viewing angle; Figure 3 A schematic front view of a power battery locking assembly according to an embodiment is shown; Figure 4 A schematic top view of a power battery locking assembly according to an embodiment is shown; Figure 5 Shows Figure 4 AA cross-sectional schematic diagram of the power battery locking assembly in the embodiment; Figure 6 A partial schematic diagram of a power battery locking assembly according to an embodiment is shown; Figure 7 Shows Figure 6 A schematic top view of a power battery locking assembly in an embodiment; Figure 8 Shows Figure 6 A schematic front view of a power battery locking assembly in an embodiment; Fig. 9 A schematic diagram of a second locking unit of a power battery locking assembly according to an embodiment is shown.

[0017] Figure numerals: 10 first locking unit; 11 first fixed shaft; 12 rotating part; 13 accommodating groove; 14 locking groove; 15 first contact surface; 16 second contact surface; 17 driving part; 18 gear; 20 second locking unit; 21 second fixed shaft; 22 locking tongue; 23 first locking surface; 24 second locking surface. DETAILED DESCRIPTION

[0018] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0019] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0020] At present, the chassis battery swap is limited by the site and has certain requirements for the height space of the battery swap. The battery swap station often needs to ensure sufficient height space for the battery swap by digging trenches or using jacks, which will undoubtedly increase the construction cost of the battery swap station. In order to reduce the construction cost of the battery swap station and reduce the requirements for the height space of the battery swap for the chassis battery swap, in this embodiment, a power battery locking assembly is disclosed, such as Figure 1 As shown, the power battery locking assembly may include a first locking unit 10 and a second locking unit 20 .

[0021] like Figure 4 As shown, the first locking unit 10 includes a first fixed shaft 11 and a rotating portion 12. Figure 5 As shown, the first fixed shaft 11 is rotatably connected to the rotating part 12. The first fixed shaft 11 is used to be detachably connected to the chassis of the vehicle. Figure 1 , Figure 2 As shown, the rotating part 12 is provided with a receiving groove 13 and a locking groove 14 with openings intersecting each other. The receiving groove 13 is used to receive the second fixed shaft 21 and the locking tongue 22 of the second locking unit 20, and the locking groove 14 is used to limit the locking tongue 22. The axis of rotation of the rotating part 12 is parallel to the opening direction of the receiving groove 13. The receiving groove 13 is located at the center of rotation of the rotating part 12. The opening of the receiving groove 13 is in the shape of an elongated strip, so that the rotating part 12 can be locked and unlocked with the locking tongue 22 by rotation. The locking groove 14 is connected to the receiving groove 13. As shown in FIG. Figure 3 As shown, the first locking unit 10 has a first contact surface 15. The first contact surface 15 extends into the accommodating groove 13 and the locking groove 14. The axis of rotation of the rotating part 12 intersects with the first contact surface 15. The rotating part 12 has a second contact surface 16. The second contact surface 16 is located in the locking groove 14. The first contact surface 15 and the second contact surface 16 can be arranged at intervals. The axis of rotation of the rotating part 12 intersects with the extended surface of the second contact surface 16 and the included angle is an acute angle. The distance between the first contact surface 15 and the second contact surface 16 gradually increases or decreases along the circumference around the first fixed axis 11. The second contact surface 16 can be an inclined surface or a spiral surface around the circumference of the first fixed axis 11. As shown in FIG. Figure 6 , Figure 7 As shown, two second abutment surfaces 16 may be spaced apart on the rotating portion 12 , and the two second abutment surfaces 16 are inclined in opposite directions, so as to facilitate tightening and fixing the locking tongue 22 and maintain relative stillness with the locking tongue 22 .

[0022] like Figure 6 , Figure 7 As shown, the second locking unit 20 includes a second fixed shaft 21 and a locking tongue 22. The locking tongue 22 is fixedly connected to one end of the second fixed shaft 21. The locking tongue 22 protrudes from the circumferential surface of the second fixed shaft 21, that is, the locking tongue 22 extends in the radial direction of the second fixed shaft 21. Figure 8 , Fig. 9 As shown, the locking tongue 22 has a first locking surface 23 and a second locking surface 24 that are opposite to each other. The angle between the second locking surface 24 and the axis of the second fixed shaft 21 is an acute angle. The spacing between the first locking surface 23 and the second locking surface 24 gradually increases or decreases along the circumferential direction around the second fixed shaft 21. As a result, the cross section of the locking tongue 22 is a wedge-shaped surface, and the inclined surface of the locking tongue 22 can be opposite to the direction of the second contact surface 16, so as to better abut and fit with the second contact surface 16.

[0023] The power battery locking assembly has a locked state and an unlocked state. In the locked state, the second fixed shaft 21 is inserted into the receiving groove 13, the locking tongue 22 is located in the locking groove 14, the first locking surface 23 is in contact with the first contact surface 15, and the second locking surface 24 is in contact with the second contact surface 16. Thus, the first locking unit 10 forms a limit for the second locking unit 20, the first contact surface 15 and the second contact surface 16 jointly limit the axial displacement of the second locking unit 20, and the second contact surface 16 limits the circumferential displacement of the second locking unit 20. In the unlocked state, the first locking unit 10 is separated from the second locking unit 20. When unlocking, the rotating part 12 can be driven to rotate, the second locking surface 24 slides along the inclined direction of the second contact surface 16, and the locking tongue 22 gradually enters the receiving groove 13, and then the second locking unit 20 is separated from the receiving groove 13 by gravity, so that the second locking unit 20 is separated from the first locking unit 10.

[0024] Through the above arrangement, the rotating part 12 is arranged close to the chassis of the vehicle, thereby shortening the overall length of the power battery locking assembly and reducing the height space requirement for battery replacement, so that the battery replacement station does not need to change the height space requirement for chassis battery replacement by digging trenches, jacks, etc., thereby reducing the construction cost of the battery replacement station. At the same time, compared with the use of multiple screws to fix the power battery, it is difficult to align multiple screw holes or elastic pins at the same time. The method of spiral engagement between the lock tongue 22 and the rotating part 12 is easy to disassemble and install, with low maintenance cost, and the top tightening force between the second contact surface 16 and the second locking surface 24 changes less under long-term use, and the reliability is higher. In actual use, the processing error of the chassis and the battery box frame of the power battery is large, the number of locking mechanisms is large, and the locking distance of the locking mechanism requires a certain amount of redundancy. According to different processing errors, in this embodiment, when multiple power battery locking assemblies lock and fix the power battery, the wedge surface top tightening force of the first locking unit 10 and the second locking unit 20 of each locking assembly can be different. Therefore, the mechanical tolerance of the power battery locking assembly of this embodiment is relatively large, so that when different battery boxes are installed, the multiple second locking units 20 on each battery box can be aligned and adapted with the first locking units 10 on the vehicle.

[0025] In this embodiment, if Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, the first locking unit 10 may further include a driving part 17. The driving part 17 may be a gear 18, which is driven by a servo motor and the gear 18 meshing, or by a hydraulic press, a pneumatic motor and a rack meshing, or other driving methods. The gear 18 is integrally formed with the rotating part 12 or fixedly connected, so that the rotating part 12 can be driven to rotate, thereby locking and separating the second locking unit 20. The outer diameter of the gear 18 is equal to the outer diameter of the rotating part 12, thereby reducing the space occupied by the vehicle chassis and avoiding conflicts with other vehicle mechanisms.

[0026] In this embodiment, if Figure 2 As shown, the gear 18 is an incomplete gear 18. The locking groove 14 and the projection of the gear 18 on the end face of the rotating part 12 along its own axial direction are arranged in a staggered manner. Since the locking groove 14 is provided on the rotating part 12, the axial thickness of the rotating part 12 at the position where the locking groove 14 is provided is reduced, so that the structural strength is poor. Through the above arrangement, when the power battery locking assembly is in the locked state, it can ensure that the structural strength of the rotating part 12 near the lock tongue 22 meets the requirements, thereby extending the service life of the rotating part 12.

[0027] In this embodiment, if Figure 6 , Figure 7 As shown, since the angle between the axis of the locking tongue 22 along the radial direction of the second fixed axis 21 and the axis of the accommodating groove 13 along the length direction is 90°, the locking between the first locking unit 10 and the second locking unit 20 is more stable, and the more the number of locking tongues 22, the smaller the angle required for locking is, and the easier it is to fall off due to bumps. In order to prevent the first locking unit 10 and the second locking unit 20 from separating due to bumps, two locking tongues 22 can be arranged relatively. Figure 6 As shown, the gear 18 includes two incomplete gears 18. In the locked state, the two locking tongues 22 and the projections of the two incomplete gears 18 on the end surface of the rotating part 12 along its own axial direction are arranged in a staggered manner. Thus, when the power battery locking assembly is in the locked state, the structural strength of the rotating part 12 near the locking tongue 22 can be ensured, the service life of the rotating part 12 can be extended, and the driving force of the rotating part 12 can be made more uniform and stable.

[0028] In this embodiment, if Figure 6 , Figure 8As shown, the locking tongue 22 corresponds to the second contact surface 16 one by one, so that the second contact surface 16 can press against the locking tongue 22 to prevent the second locking unit 20 from slipping out. The angle between the second contact surface 16 and the axis of the first fixed shaft 11 is a first tilt angle. The angle between the second locking surface 24 of the locking tongue 22 and the axis of the second fixed shaft 21 is a second tilt angle. The first tilt angle of the second contact surface 16 is equal to the second tilt angle of the corresponding locking tongue 22. Thus, the contact area between the second contact surface 16 and the corresponding locking tongue 22 is ensured, so that the locking tongue 22 can be closely matched with the second contact surface 16 to ensure stable locking.

[0029] The first inclination angles corresponding to the two second contact surfaces 16 have a difference, that is, the slopes of the two second contact surfaces 16 are different, so that the second locking surfaces 24 of the corresponding lock tongues 22 are subjected to different clamping forces. Different clamping forces can be designed according to specific needs to meet various design requirements.

[0030] In this embodiment, if Figure 8 As shown, the spacing between the second contact surface 16 and the teeth of the incomplete gear 18 is the first spacing, that is, the spacing between the center of the second contact surface 16 and the teeth of the incomplete gear 18 along the circumferential direction of the rotating part 12. The first spacing is negatively correlated with the first tilt angle, and the smaller the first spacing, the larger the first tilt angle, so as to ensure that the number of teeth of the incomplete gear 18 meets the requirements of mechanical drive while ensuring the structural strength of the rotating part 12 near the lock tongue 22, thereby improving the reliability of the rotating part 12.

[0031] In this embodiment, if Figure 7 As shown, the opening width of the receiving groove 13 is greater than the diameter of the second fixed shaft 21, thereby ensuring that the second fixed shaft 21 can smoothly extend into the receiving groove 13, improving the mechanical tolerance, and reducing the time for the second fixed shaft 21 to align with the opening of the receiving groove 13.

[0032] In this embodiment, this embodiment discloses a new energy vehicle, which includes a power battery locking assembly of any one of the above embodiments, and the new energy vehicle may also include a body, a chassis, wheels, and a power battery box. The chassis is detachably connected to the body. The wheels are rotatably connected to the chassis. The first fixed shaft 11 of the power battery locking assembly is detachably connected to the chassis. The second fixed shaft 21 of the power battery locking assembly is detachably connected to the power battery box. The chassis can quickly complete the locking and separation of the power battery box through the power battery locking assembly, thereby achieving the purpose of rapid battery replacement and ensuring the efficiency of energy replenishment for new energy vehicles.

[0033] In this embodiment, two locking tongues 22 of the power battery locking assembly are relatively arranged. The arrangement direction of the two locking tongues 22 is perpendicular to the driving direction of the vehicle. Therefore, when the body of the new energy vehicle swings left and right, different tightening forces are provided by the different slopes of the second contact surface 16 to prevent the power battery box from shaking, so that the power battery locking assembly has a higher locking stability for the power battery box. The new energy vehicle in this embodiment can be applied to commercial vehicles. The front and rear wheelbases of commercial vehicles are larger, while the left and right wheelbases are shorter. Therefore, on bumpy roads, the front and rear bumps are smaller and the left and right bumps are larger. This embodiment can resist the left and right bumps of the vehicle, thereby maximizing the anti-vibration performance of commercial vehicles.

[0034] In this embodiment, the locking tongue 22 corresponds to the second contact surface 16 one by one, so that the second contact surface 16 presses against the locking tongue 22 to prevent the second locking unit 20 from slipping out. The angle between the second contact surface 16 and the axis of the first fixed shaft 11 is a first tilt angle. The angle between the second locking surface 24 of the locking tongue 22 and the axis of the second fixed shaft 21 is a second tilt angle. The first tilt angle of the second contact surface 16 is equal to the second tilt angle of the corresponding locking tongue 22. Thus, the contact area between the second contact surface 16 and the corresponding locking tongue 22 is ensured, so that the locking tongue 22 can be closely matched with the second contact surface 16 to ensure stable locking.

[0035] The second inclination angle of the locking tongue 22 close to the outside of the vehicle body is smaller than the second inclination angle of the locking tongue 22 close to the inside of the vehicle body, that is, in the two power battery locking assemblies located at both ends of the axis of the power battery box perpendicular to the driving direction of the vehicle, the outer locking tongue 22 can be made to have a higher inclination and a greater clamping force, thereby utilizing a larger spacing to form a larger force arm stroke to provide stable support, further ensuring the stability of the power battery box.

[0036] It should be understood that the “present embodiment” mentioned in the present invention is based on the technical points currently described, and multiple “present embodiments” may be the same embodiment or different embodiments.

[0037] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A power battery locking assembly, characterized in that: The power battery locking assembly comprises: The first locking unit, the first locking unit comprising a first fixed axis and a rotating part; the first fixed axis is rotatably connected to the rotating part; the first fixed axis is used to be detachably connected to the chassis of the vehicle; the rotating part is provided with a receiving groove and a locking groove with openings intersecting in an intersecting direction; the axis of rotation of the rotating part is parallel to the opening direction of the receiving groove; the receiving groove is located at the center of rotation of the rotating part; the opening of the receiving groove is elongated; the locking groove is connected to the receiving groove; the first locking unit has a first contact surface; the first contact surface extends into the receiving groove and the locking groove; the axis of rotation of the rotating part intersects with the first contact surface; the rotating part has a second contact surface; the second contact surface is located in the locking groove; the axis of rotation of the rotating part intersects with the extension surface of the second contact surface and the angle is an acute angle; the distance between the first contact surface and the second contact surface gradually increases or decreases along the circumferential direction around the first fixed axis; A second locking unit, the second locking unit comprising a second fixed shaft and a locking tongue; the locking tongue is fixedly connected to one end of the second fixed shaft; the locking tongue protrudes from the circumferential surface of the second fixed shaft; the locking tongue has a first locking surface and a second locking surface which are opposite to each other; the angle between the second locking surface and the axis of the second fixed shaft is an acute angle; the distance between the first locking surface and the second locking surface gradually increases or decreases along the circumference of the second fixed shaft; Wherein, the power battery locking assembly has a locked state and an unlocked state; In the locked state, the second fixed shaft is inserted into the receiving groove, the locking tongue is located in the locking groove, the first locking surface is in contact with the first contact surface, and the second locking surface is in contact with the second contact surface; In the unlocked state, the first locking unit is separated from the second locking unit.

2. A power battery locking assembly according to claim 1, characterized in that: The first locking unit further includes a driving part; the driving part includes a gear; the gear is integrally formed with the rotating part or fixedly connected; the outer diameter of the gear is equal to the outer diameter of the rotating part.

3. A power battery locking assembly according to claim 2, characterized in that: The gear is an incomplete gear; the locking groove and the projection of the gear on an end surface of the rotating part along its own axial direction are arranged in a staggered manner.

4. A power battery locking assembly according to claim 3, characterized in that: The locking tongues are arranged in pairs opposite to each other; the gears include two incomplete gears; in the locked state, the projections of the two locking tongues and the two incomplete gears on the end surface of one end of the rotating part along its own axial direction are arranged alternately.

5. A power battery locking assembly according to claim 4, characterized in that: The locking tongue corresponds to the second contact surface one by one; the angle between the second contact surface and the axis of the first fixed shaft is a first inclination angle; the angle between the second locking surface of the locking tongue and the axis of the second fixed shaft is a second inclination angle; the first inclination angle of the second contact surface is equal to the corresponding second inclination angle of the locking tongue; The first inclination angles corresponding to the two second contact surfaces have a difference.

6. A power battery locking assembly according to claim 5, characterized in that: The distance between the second contact surface and the teeth of the incomplete gear is a first distance; and the first distance is negatively correlated with the first inclination angle.

7. A power battery locking assembly according to claim 6, characterized in that: The opening width of the accommodating groove is greater than the diameter of the second fixing shaft.

8. A new energy vehicle, characterized in that: The new energy vehicle includes: Car body; A chassis, the chassis being detachably connected to the vehicle body; A wheel, the wheel being rotatably connected to the chassis; The power battery locking assembly according to any one of claims 1 to 7; wherein the first fixed shaft of the power battery locking assembly is detachably connected to the chassis; Power battery box; the second fixed shaft of the power battery locking assembly is detachably connected to the power battery box.

9. A new energy vehicle according to claim 8, characterized in that: The power battery locking assembly has two locking tongues arranged opposite to each other; the arrangement direction of the two locking tongues is perpendicular to the driving direction of the vehicle.

10. A new energy vehicle according to claim 9, characterized in that: The locking tongue corresponds to the second contact surface one by one; the angle between the second contact surface and the axis of the first fixed shaft is a first inclination angle; the angle between the second locking surface of the locking tongue and the axis of the second fixed shaft is a second inclination angle; the first inclination angle of the second contact surface is equal to the corresponding second inclination angle of the locking tongue; The second inclination angle of the locking tongue close to the outer side of the vehicle body is smaller than the second inclination angle of the locking tongue close to the inner side of the vehicle body.

Images