An electric vehicle battery securing device

Abstract

This invention relates to a battery fixing device for electric vehicles, comprising a battery box installed under the seat of an electric vehicle, wherein a battery pack is installed inside the battery box, and the battery pack is encased in a shell. A handle is provided at the upper end of the shell. The shell and the battery box are fixed in two stages by an upper fixing mechanism and a lower fixing mechanism. The upper and lower fixing mechanisms are driven and fixed by a locking mechanism. Multiple rollers are rotatably mounted on the inner wall of the battery box, and multiple spring-loaded telescopic rods are provided at the bottom of the battery box. Small ball bearings are rotatably mounted at the upper end of each spring-loaded telescopic rod. This invention achieves omnidirectional fixing of the battery and simultaneously fixes the upper and lower ends of the battery, making battery fixing convenient, quick, and secure.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and more specifically to an electric vehicle battery fixing device. Background Technology

[0002] Electric vehicles use batteries as their energy source and convert electrical energy into mechanical energy for movement through components such as controllers and motors. They are widely popular due to their environmental friendliness and convenience, and have become an important means of short-distance transportation. Currently, most electric vehicles place the battery in a battery box under the seat. However, due to the gap between the battery and the battery box, the battery cannot be properly secured inside the battery box in order to facilitate its insertion. This results in the electric vehicle constantly bumping during operation, which affects the battery's lifespan. Summary of the Invention

[0003] To address the problems in the existing technology, the present invention provides an electric vehicle battery fixing device that achieves all-round fixing of the battery and simultaneously fixes the upper and lower ends of the battery, making the fixing of the battery convenient, quick and secure.

[0004] The technical solution adopted by this invention to solve its technical problem is: an electric vehicle battery fixing device, including a battery box installed under the seat of an electric vehicle, a battery pack inside the battery box, and a casing covering the battery pack. A handle is provided at the upper end of the casing. The casing and the battery box are fixed twice by an upper fixing mechanism and a lower fixing mechanism. The upper and lower fixing mechanisms are driven and fixed by a locking mechanism. Multiple rollers are rotatably arranged on the inner wall of the battery box, and multiple spring telescopic rods are provided at the bottom of the battery box. Small ball bearings are rotatably arranged at the upper end of each spring telescopic rod. The fixing mechanism consists of four sets, located on the four end faces of the outer casing. The upper fixing mechanism includes a base fixed to the upper end of the battery box, a driven shaft rotatably mounted on the base, an arc-shaped block coaxial with the driven shaft and fixed to the base, two arc-shaped guide rods arranged along the arc-shaped block and fixed at one end to the base, a slider movably mounted on the two arc-shaped guide rods, a first rotating rod fixed at one end to the driven shaft and rotatably mounted on the slider, a second rotating rod perpendicular to the first rotating rod and fixed to the driven shaft, a locking device engaged with the slider and fixed to the outer casing, and a device fixed to the locking device. Push the plate; first, flip up the electric vehicle seat to open the battery box underneath. Place the battery pack with its casing inside the battery box. Multiple rollers guide the casing and reduce collisions between the casing and the inner wall of the battery box. Multiple spring-loaded telescopic rods provide good cushioning for the battery pack. After the battery pack is fully placed in the battery box, the upper fixing mechanism first secures it horizontally. Then, the locking mechanism simultaneously drives both the upper and lower fixing mechanisms, allowing the upper fixing mechanism to secure the battery pack vertically. The lower locking mechanism... The fixing mechanism secures the battery pack from all angles. By fixing the upper and lower ends of the battery pack, the fixation is made more secure. The above overall setup enables comprehensive, convenient, quick, and secure fixing of the battery pack. When the battery pack with its casing is placed into the battery box, the locking mechanism descends together. The push plate on the locking mechanism first contacts the second rotating rod, causing the second rotating rod to rotate, which in turn rotates the driven shaft, thereby rotating the first rotating rod. This causes the slider to move along the two arc-shaped guide rods, that is, the slider moves upward along the arc-shaped block, allowing the slider to engage with the locking mechanism to fix the battery pack horizontally.

[0005] Specifically, the push plate is provided with a first inclined surface and a first flat surface; the base is provided with a slot and a second inclined surface; the card is provided with a card plate and a third inclined surface; the card plate cooperates with the slot; and the second inclined surface abuts against the third inclined surface.

[0006] Specifically, the card is provided with a fourth inclined surface, a fifth inclined surface, and a second plane, and the slider is provided with a sixth inclined surface, a seventh inclined surface, an eighth inclined surface, and a third plane. The fourth inclined surface abuts against the sixth inclined surface, the fifth inclined surface abuts against the seventh inclined surface, and the second plane abuts against the third plane.

[0007] Specifically, the lower fixing mechanism is provided in two sets and symmetrically arranged. The two sets of lower fixing mechanisms are used in conjunction with two sets of upper fixing mechanisms. The lower fixing mechanism includes a slide rail fixed on the battery box, a slide base movably mounted on the slide rail, a first moving plate and a second moving plate symmetrically and movably mounted on the slide base, a first spring fixed at both ends on the slide base and the slide rail, a second spring fixed at both ends on the first moving plate and the second moving plate, a first insert rod fixed on the first moving plate, a second insert rod fixed on the second moving plate, a first fixing plate that cooperates with the first insert rod and is fixed on the outer shell, a first insertion hole on the first fixing plate, a second fixing plate that cooperates with the second insert rod and is fixed on the outer shell, and a second insertion hole on the second fixing plate.

[0008] Specifically, a lifting frame is movably mounted on the slide rail, the lifting frame has a ninth inclined surface and a fourth plane, a conical plate is fixedly mounted on the lifting frame, a guide rod is fixedly mounted on the lifting frame, the lifting frame is reset by a third spring, and a limiting block is also provided on the lifting frame; a guide groove is also provided on the slide block, and a first inclined groove and a second inclined groove are respectively provided on the first moving plate and the second moving plate.

[0009] Specifically, the card is also provided with two guide posts, and a translation plate is movably provided on the two guide posts. The translation plate is provided with a tenth inclined surface. The translation plate is reset by a fourth spring, and the tenth inclined surface abuts against the eighth inclined surface.

[0010] Specifically, the locking mechanism includes a first movable frame and a second movable frame movably mounted on the battery box, a driven gear rotatably mounted on the battery box and meshing with the first and second movable frames respectively, a fixed seat located between the first and second movable frames and fixed on the battery box, a first rack and a second rack movably mounted on the fixed seat, a first vertical plate perpendicular to and fixed on the first rack, a second vertical plate perpendicular to and fixed on the second rack, a driving gear rotatably mounted on the fixed seat and meshing with the first and second racks respectively, and a first rotating shaft rotatably mounted on the battery box. Two rotating shafts, a third rotating shaft rotatably mounted on a first movable frame, a fourth rotating shaft rotatably mounted on a second movable frame, a third rotating rod movably mounted on the first rotating shaft and fixed at one end to the third rotating shaft, a fourth rotating rod movably mounted on the second rotating shaft and fixed at one end to the fourth rotating shaft, a fifth spring sleeved on the third rotating rod and fixed at both ends to the third rotating shaft and the first rotating shaft respectively, and a sixth spring sleeved on the fourth rotating rod and fixed at both ends to the second rotating shaft and the fourth rotating shaft respectively. The other end of the third rotating rod is movably mounted on a first vertical plate, and the other end of the fourth rotating rod is movably mounted on a second vertical plate.

[0011] The beneficial effects of this invention are:

[0012] First, flip up the electric vehicle seat to open the battery box underneath. Place the battery pack, including its casing, into the battery box. Multiple rollers guide the casing and reduce collisions between it and the inner wall of the battery box. Multiple spring-loaded telescopic rods provide excellent cushioning for the battery pack. After the battery pack is fully placed in the battery box, the upper fixing mechanism secures it horizontally. Then, a locking mechanism simultaneously drives both the upper and lower fixing mechanisms, allowing the upper fixing mechanism to secure the battery pack vertically. The lower fixing mechanism then secures the battery pack from all angles. By fixing the top and bottom of the battery pack, the fixation becomes even more secure. This overall setup ensures a comprehensive, convenient, quick, and secure fixation of the battery pack. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0016] Figure 3 for Figure 1 Enlarged view of point D in the image;

[0017] Figure 4 A front view of the stop-lock mechanism;

[0018] Figure 5 for Figure 4 Enlarged view of point B in the image;

[0019] Figure 6 This is a front view of the upper fixing mechanism;

[0020] Figure 7 for Figure 6 Enlarged view of point C in the image;

[0021] Figure 8 for Figure 4 A sectional view of line AA in the diagram;

[0022] Figure 9 for Figure 8 A sectional view of the BB line in the middle;

[0023] Figure 10 for Figure 8 A cross-sectional view of the CC line in the diagram;

[0024] Figure 11 for Figure 10 Enlarged view of point E in the image;

[0025] Figure 12 for Figure 10 A sectional view of the DD line in the middle;

[0026] Figure 13 for Figure 12 Enlarged view of point F in the image;

[0027] Figure 14 A schematic diagram of the stop-lock mechanism;

[0028] Figure 15 for Figure 14 Enlarged view of point G in the image. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] like Figures 1-15As shown, the electric vehicle battery fixing device of the present invention includes a battery box 1 installed under the seat of an electric vehicle. The battery box contains a battery pack, which is encased in a shell 2. A handle 3 is provided at the upper end of the shell. The shell and battery box are fixed twice by an upper fixing mechanism 4 and a lower fixing mechanism 5. The upper and lower fixing mechanisms are driven and fixed by a locking mechanism 6. Multiple rollers 7 are rotatably mounted on the inner wall of the battery box, and multiple spring telescopic rods are provided at the bottom of the battery box. Small ball bearings are rotatably mounted at the upper end of each spring telescopic rod. The upper fixing mechanism 4 consists of four sets. The upper fixing mechanism 4, located on the four end faces of the outer casing, includes a base 41 fixedly mounted on the upper end of the battery box, a driven shaft 42 rotatably mounted on the base, an arc-shaped block 43 coaxial with the driven shaft and fixedly mounted on the base, two arc-shaped guide rods 44 arranged along the arc-shaped block and fixed at one end on the base, a slider 45 movably mounted on the two arc-shaped guide rods, a first rotating rod 46 fixedly sleeved on the driven shaft at one end and rotatably mounted on the slider at the other end, a second rotating rod 47 perpendicular to the first rotating rod and fixedly mounted on the driven shaft, a clip 48 engaging with the slider and fixedly mounted on the outer casing, and a fixing... The push plate 49 is located on the card; first, the electric vehicle seat is flipped up to open the battery box underneath. The battery pack with its casing is then placed inside the battery box. Multiple rollers guide the casing and reduce collisions between the casing and the inner wall of the battery box. Multiple spring-loaded telescopic rods provide good cushioning for the battery pack. After the battery pack is fully placed inside the battery box, the upper fixing mechanism first secures it horizontally. Then, the locking mechanism simultaneously drives both the upper and lower fixing mechanisms, allowing the upper fixing mechanism to secure the battery pack vertically. The battery pack is then secured in all directions by the lower fixing mechanism. By fixing the upper and lower ends of the battery pack, the fixation becomes more secure. The overall setup described above enables comprehensive, convenient, quick, and secure fixation of the battery pack. When the battery pack with its casing is placed into the battery box, the locking mechanism descends together. The push plate on the locking mechanism first contacts the second rotating rod, causing the second rotating rod to rotate. This causes the driven shaft to rotate, which in turn causes the first rotating rod to rotate. This causes the slider to move along the two arc-shaped guide rods, i.e., the slider moves upward along the arc-shaped block, allowing the slider to engage with the locking mechanism to fix the battery pack horizontally.

[0031] Specifically, the push plate 49 is provided with a first inclined surface 491 and a first flat surface 492; the base is provided with a slot 411 and a second inclined surface 412; the locking member 48 is provided with a locking plate 481 and a third inclined surface 482, the locking plate engages with the slot, and the second inclined surface abuts against the third inclined surface; the locking member is also provided with a fourth inclined surface 483 and a fifth inclined surface 484 and a second flat surface 485; the slider 45 is provided with a sixth inclined surface 451, a seventh inclined surface 452 and an eighth inclined surface 453 and a third flat surface 454, the fourth inclined surface abuts against the sixth inclined surface, the fifth inclined surface abuts against the seventh inclined surface, and the second flat surface abuts against the third flat surface; after the slider and the locking member are engaged, the locking plate is inserted into the slot, causing the second inclined surface to abut against the third inclined surface, and the fourth inclined surface to abut against the third inclined surface. The first inclined plane abuts against the sixth inclined plane, the fifth inclined plane abuts against the seventh inclined plane, and the second plane abuts against the third plane. These abutments allow for more comprehensive positioning of the slider and the locking mechanism, while also providing guidance. This ensures better engagement of the slider with the locking mechanism. At this point, the first inclined plane and the second rotating rod are in contact, and the first plane and the second rotating rod are in contact, thus limiting the second rotating rod and ultimately limiting the slider. This fixes the slider after it rises, thus securing it horizontally after engagement with the locking mechanism. The upper fixing mechanism consists of four sets, located on the four end faces of the battery pack, enabling omnidirectional fixing and further enhancing the fixing effect. This fixing is achieved through the weight of the battery pack itself, making it convenient and quick.

[0032] Specifically, the lower fixing mechanism 5 has two sets arranged symmetrically. The two sets of lower fixing mechanisms are used in conjunction with two sets of upper fixing mechanisms. The lower fixing mechanism 5 includes a slide rail 51 fixed on the battery box, a slide block 52 movably mounted on the slide rail, a first moving plate 53 and a second moving plate 54 symmetrically and movably mounted on the slide block, a first spring 55 fixed at both ends on the slide block and the slide rail respectively, a second spring 56 fixed at both ends on the first moving plate and the second moving plate respectively, a first insert rod 57 fixed on the first moving plate, a second insert rod 58 fixed on the second moving plate, a first fixing plate 59 cooperating with the first insert rod and fixed on the outer shell, a first insertion hole 510 provided on the first fixing plate and cooperating with the second insert rod and fixed on the outer shell. The second fixing plate 520 on the casing and the second insertion hole 530 on the second fixing plate; after the battery pack is placed into the battery box, the sliding block is driven to move towards the battery pack and finally abut against the surface of the casing. Then, the first moving plate and the second moving plate are driven to move away from each other, so that the first moving plate moves towards the first fixing plate and the second moving plate moves towards the second fixing plate. Finally, the first insertion rod is inserted into the first insertion hole and the second insertion rod is inserted into the second insertion hole, thus completing the fixing of the battery pack again. Subsequently, the sliding block is reset by the first spring and the first moving plate and the second moving plate are reset by the second spring. The fixing in the above manner can fix the battery pack in all directions and fix the lower end of the battery pack, making the battery pack more firmly fixed.

[0033] Specifically, a lifting frame 511 is movably mounted on the slide rail 51. The lifting frame has a ninth inclined surface 512 and a fourth plane 513. A conical plate 514 is fixedly mounted on the lifting frame. A guide rod 515 is fixedly mounted on the lifting frame. The lifting frame is reset by a third spring 516. A limiting block 517 is also provided on the lifting frame. A guide groove 521 is also provided on the slide block. A first inclined groove 531 and a second inclined groove 541 are respectively provided on the first moving plate and the second moving plate. The locking mechanism drives the lifting frame to descend. First, the guide rod on the lifting frame is inserted into the guide groove, causing the slide block to move towards the battery pack. After the lifting frame continues to descend, the slide block remains stationary, that is, the slide block abuts against the surface of the outer shell. The conical plate corresponds to the first inclined groove and the second inclined groove at the same time. The conical plate descends along the first inclined groove and the second inclined groove, causing the first moving plate and the second moving plate to move away from each other. The above settings result in good overall linkage.

[0034] Specifically, the card is also provided with two guide posts 486, and a translation plate 487 is movably provided on the two guide posts. The translation plate is provided with a tenth inclined surface 488. The translation plate is reset by a fourth spring 489. The tenth inclined surface abuts against the eighth inclined surface. After the slider and the card are engaged, the locking mechanism pushes the translation plate to move towards the slider, so that the tenth inclined surface on the translation plate abuts against the eighth inclined surface on the slider, so that the entire card is engaged with the slider, limiting the vertical position of the card, that is, fixing the battery pack vertically.

[0035] Specifically, the locking mechanism 6 includes a first movable frame 61 and a second movable frame 62 movably mounted on the battery box, a driven gear 63 rotatably mounted on the battery box and meshing with the first and second movable frames respectively, a fixed base 64 located between the first and second movable frames and fixed on the battery box, a first rack 65 and a second rack 66 movably mounted on the fixed base, a first vertical plate 67 perpendicular to and fixed on the first rack, a second vertical plate 68 perpendicular to and fixed on the second rack, and a driven gear 63 rotatably mounted on the fixed base. A drive gear 69 meshing with the first and second racks; a first rotating shaft 610 and a second rotating shaft 611 rotatably mounted on the battery box; a third rotating shaft 612 rotatably mounted on the first movable frame; a fourth rotating shaft 613 rotatably mounted on the second movable frame; a third rotating rod 614 movably mounted on the first rotating shaft and fixed at one end on the third rotating shaft; a fourth rotating rod 615 movably mounted on the second rotating shaft and fixed at one end on the fourth rotating shaft; and a fifth spring 6 sleeved on the third rotating rod and fixed at both ends to the third rotating shaft and the first rotating shaft, respectively. 16. A sixth spring 617 is sleeved on the fourth rotating rod and fixed at both ends to the second and fourth rotating shafts respectively. The other end of the third rotating rod is movably mounted on the first vertical plate, and the other end of the fourth rotating rod is movably mounted on the second vertical plate. The first movable frame is fixedly connected to the first rack, and the second movable frame is fixedly connected to the second rack. When the car key is inserted into the keyhole and rotated, it drives the drive gear to rotate, causing the first rack and the second rack to move relative to each other. When the locking mechanism is fixed to the upper fixing mechanism and the lower fixing structure, the first rack and the second rack move closer to each other, so that... The first and second movable frames move closer to each other. The lower end of the first movable frame moves along the ninth inclined plane. As the first movable frame moves horizontally, the lifting frame descends. The movement of the first movable frame stops after the lower end of the first movable frame comes into contact with the fourth plane. At the same time, the upper end of the first movable frame pushes the translation plate to move along the direction of the guide column, so that the tenth inclined plane of the translation plate comes into contact with the eighth inclined plane. Finally, the driving and locking of the upper and lower fixing mechanisms are completed. The fourth plate is set to restrict the reset of the lifting frame, thereby keeping the lower fixing mechanism fixed to the battery pack casing.When the first and second movable frames move closer together, the third and fourth rotating rods rotate. Through the fifth and sixth springs, a rotational thrust is generated on the third and fourth rotating rods, which in turn generates a thrust on the first and second movable frames. Initially, the thrust generated by these two springs is opposite to the direction of movement of the first and second movable frames. Later, the thrust generated by these two springs is in the same direction as the movement of the first and second movable frames. Even when the first and second movable frames stop moving, they still exert a thrust. After the tenth inclined plane on the translation plate abuts against the eighth inclined plane, the first and second movable frames stop moving. At this time, the fifth and sixth springs still generate a thrust on the first and second movable frames, thus automatically completing the fixing work of the first and second movable frames, that is, completing the fixing work of the upper and lower fixing mechanisms. Conversely, when unlocking the upper and lower fixing mechanisms, the drive gear rotates in the opposite direction, and the fifth and sixth springs initially generate a reaction force. To prevent accidental unlocking of the upper and lower fixing mechanisms, a fifth and sixth spring are used to assist in unlocking them. A limit block limits the first moving frame; once the lifting frame is reset by the third spring, the first moving frame stops moving. A driven gear allows the first and second moving frames to move synchronously. This design also provides excellent anti-theft protection. Even if the upper fixing mechanism is damaged, the lower fixing mechanism can still secure the battery pack from all angles. Only when both mechanisms are unlocked simultaneously can the battery pack be removed from the battery box. The lower fixing mechanism is located inside the side wall of the battery box, and the gap between the inner wall and the battery pack casing is very small, making it impossible to touch and directly damage. This protects the lower fixing mechanism, while the lower fixing mechanism provides comprehensive security for the battery pack, resulting in excellent anti-theft protection.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery fixing device for electric vehicles, characterized in that: The device includes a battery box installed under the seat of an electric vehicle. The battery box contains a battery pack, which is encased in a housing. The housing has a handle at its upper end. The housing and battery box are secured twice by an upper fixing mechanism and a lower fixing mechanism, which are driven and fixed by a locking mechanism. Multiple rollers are rotatably mounted on the inner wall of the battery box, and multiple spring-loaded telescopic rods are located at the bottom of the battery box. Small ball bearings are rotatably mounted on the upper ends of the spring-loaded telescopic rods. The upper fixing mechanism consists of four sets, located on the four end faces of the housing. The upper fixing mechanism includes a base fixedly mounted on the upper end of the battery box, a driven shaft rotatably mounted on the base, an arc-shaped block coaxial with the driven shaft and fixedly mounted on the base, two arc-shaped guide rods arranged along the arc-shaped block and fixedly mounted on the base at one end, a slider movably mounted on the two arc-shaped guide rods, a first rotating rod fixedly sleeved on the driven shaft at one end and rotatably mounted on the slider at the other end, a second rotating rod perpendicular to the first rotating rod and fixedly mounted on the driven shaft, a clip engaged with the slider and fixedly mounted on the outer shell, and a push plate fixedly mounted on the clip. The push plate is provided with a first inclined surface and a first flat surface; the base is provided with a slot and a second inclined surface; the card is provided with a card plate and a third inclined surface; the card plate cooperates with the slot; the second inclined surface abuts against the third inclined surface; the first inclined surface is in contact with the second rotating rod; and the first flat surface is in contact with the second rotating rod. The card is also provided with a fourth inclined surface, a fifth inclined surface and a second plane, and the slider is provided with a sixth inclined surface, a seventh inclined surface and an eighth inclined surface and a third plane. The fourth inclined surface abuts against the sixth inclined surface, the fifth inclined surface abuts against the seventh inclined surface, and the second plane abuts against the third plane. The card is also provided with two guide posts, and a translation plate is movably provided on the two guide posts. The translation plate is provided with a tenth inclined surface. The translation plate is reset by a fourth spring, and the tenth inclined surface abuts against the eighth inclined surface.

2. The electric vehicle battery fixing device according to claim 1, characterized in that: The lower fixing mechanism is provided in two sets and symmetrically arranged. The two sets of lower fixing mechanisms are used in conjunction with two sets of upper fixing mechanisms. The lower fixing mechanism includes a slide rail fixed on the battery box, a slide base movably mounted on the slide rail, a first moving plate and a second moving plate symmetrically and movably mounted on the slide base, a first spring fixed at both ends on the slide base and the slide rail, a second spring fixed at both ends on the first moving plate and the second moving plate, a first insert rod fixed on the first moving plate, a second insert rod fixed on the second moving plate, a first fixing plate that cooperates with the first insert rod and is fixed on the outer shell, a first insertion hole on the first fixing plate, a second fixing plate that cooperates with the second insert rod and is fixed on the outer shell, and a second insertion hole on the second fixing plate.

3. The electric vehicle battery fixing device according to claim 2, characterized in that: A lifting frame is movably mounted on the slide rail. The lifting frame has a ninth inclined surface and a fourth plane. A conical plate is fixedly mounted on the lifting frame. A guide rod is fixedly mounted on the lifting frame. The lifting frame is reset by a third spring. A limiting block is also provided on the lifting frame. A guide groove is also provided on the slide block. A first inclined groove and a second inclined groove are respectively provided on the first moving plate and the second moving plate.

4. The electric vehicle battery fixing device according to claim 1, characterized in that: The locking mechanism includes a first movable frame and a second movable frame movably mounted on the battery box; a driven gear rotatably mounted on the battery box and meshing with the first and second movable frames respectively; a fixed seat located between the first and second movable frames and fixed on the battery box; a first rack and a second rack movably mounted on the fixed seat; a first vertical plate perpendicular to and fixed on the first rack; a second vertical plate perpendicular to and fixed on the second rack; a driving gear rotatably mounted on the fixed seat and meshing with the first and second racks respectively; and a first rotating shaft and a second rotating shaft rotatably mounted on the battery box. The system comprises: a shaft, a third rotating shaft rotatably mounted on a first movable frame, a fourth rotating shaft rotatably mounted on a second movable frame, a third rotating rod movably mounted on the first rotating shaft and fixed at one end to the third rotating shaft, a fourth rotating rod movably mounted on the second rotating shaft and fixed at one end to the fourth rotating shaft, a fifth spring sleeved on the third rotating rod and fixed at both ends to the third rotating shaft and the first rotating shaft respectively, and a sixth spring sleeved on the fourth rotating rod and fixed at both ends to the second rotating shaft and the fourth rotating shaft respectively. The other end of the third rotating rod is movably mounted on a first vertical plate, and the other end of the fourth rotating rod is movably mounted on a second vertical plate.

Images