Push type buckle quick locking structure

Abstract

The application relates to the technical field of electric vehicles and discloses a press type buckle quick locking structure, which comprises a battery pack support, a power battery pack fixedly connected to the top surface of the battery pack support, the power battery pack being arranged in a battery compartment arranged in an automobile chassis; a locking assembly arranged on the battery pack support and located on the two sides of the power battery pack; a matching assembly fixedly connected to the automobile chassis and arranged on the two sides of the power battery pack and corresponding to the locking assembly; and an unlocking assembly arranged at the bottom of the battery pack support and corresponding to the locking assembly. The application has the advantages of simple structure, short action stroke, reduced positioning accuracy requirement of the battery replacement equipment, improved battery pack dismounting efficiency and the protection against mistaken unlocking.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and in particular to a press-type buckle quick-locking structure. Background Technology

[0002] With the rapid development of the new energy vehicle industry, power battery replenishment technology has become a key research focus. Among them, chassis battery swapping, which involves removing and replacing the power battery pack at the bottom of the vehicle, has advantages such as fast replenishment speed, convenient battery reuse, and effective alleviation of users' range anxiety, and has become an important part of the new energy vehicle energy supply system.

[0003] In chassis-based battery swapping scenarios, the locking mechanism is a core component for achieving reliable connection and rapid separation between the power battery pack and the vehicle chassis. During battery swapping operations, the swapping equipment must first disengage the locking mechanism, then lift and lower the old battery pack to remove it, and subsequently lift the new battery pack to the installation position and relock it. The unlocking response speed, locking load reliability, and fault tolerance of the locking mechanism to positioning deviations of the swapping equipment directly determine the overall efficiency of the battery swapping operation and driving safety performance.

[0004] Currently, the locking mechanisms commonly used in power battery packs employ bolt fastening, pin insertion, or complex linkage transmission structures. While bolt-fastening structures offer high connection strength, each bolt must be loosened and tightened individually during battery swapping, a cumbersome and time-consuming process. Furthermore, it demands stringent positioning accuracy from automated tightening tools, and repeated disassembly and assembly of the threads can lead to wear and tear, posing a safety hazard of connection failure. Pin-type locking structures offer direct unlocking, but require high precision in the coaxial alignment of the pin and the socket. When there are assembly tolerances in the vehicle chassis or battery pack, or positioning deviations in the swapping equipment, pin jamming and difficulty in insertion / removal can easily occur. Moreover, single-pin structures lack effective anti-loosening and anti-mislocking designs, posing a risk of pin dislodgement during vehicle operation due to bumps, vibrations, and braking impacts. Although complex linkage locking structures can achieve linkage unlocking, they have a large number of components and a complex structure, which not only results in high processing and assembly costs and difficult maintenance, but also a long transmission chain and a large stroke, further increasing the precision requirements of the battery swapping actuator, which is not conducive to the large-scale promotion and application of battery swapping stations.

[0005] To address this, a press-type snap-lock structure for quick locking is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a press-type snap-lock structure for quick locking, which aims to solve or improve at least one of the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides a press-type snap-lock structure, including... A battery pack support, on the top surface of which a power battery pack is fixedly connected, the power battery pack being located in a battery compartment within the vehicle chassis; A locking assembly is located on the battery pack support and on both sides of the power battery pack. The mating assembly is fixedly connected to the vehicle chassis, and the mating assembly is located on both sides of the power battery pack and is correspondingly arranged with the locking assembly. An unlocking component is located at the bottom of the battery pack support, and the unlocking component is correspondingly configured with the locking component.

[0008] Preferably, the locking assembly includes a receiving groove formed on the battery pack support, a rotating buckle is rotatably connected in the receiving groove, the top of the rotating buckle is provided with a snap-fit ​​protrusion, the bottom surface of the snap-fit ​​protrusion is a bearing locking surface, the top surface of the snap-fit ​​protrusion is a guide slope, and the rotating buckle is adapted to the mating assembly.

[0009] Preferably, the mating component includes a lock base that is fixedly connected to the vehicle chassis, the lock base having a snap-fit ​​groove, and the snap-fit ​​protrusion at the top of the rotating snap-fit ​​being located within the snap-fit ​​groove.

[0010] Preferably, the unlocking component includes a button cover that is slidably connected to the bottom surface of the battery pack support. A pushing boss is installed on the top of the button cover. The pushing boss is in contact with the bottom edge of the rotating buckle. Bosses are provided on both sides of the bottom surface of the battery pack support. A return spring is fixedly connected between the bosses and the bottom end of the rotating buckle.

[0011] Preferably, a position detection component is installed on the vehicle chassis, and the position detection component is correspondingly set with the rotary buckle; a buffer pad is installed at the bottom of the lock base.

[0012] Preferably, a fixed shaft is provided in the receiving groove, the fixed shaft passes through the rotating buckle and rotates with the rotating buckle, a retaining ring is installed on the fixed shaft, the two retaining rings are respectively located on both sides of the rotating buckle, and a wear-resistant bushing is provided between the fixed shaft and the rotating buckle.

[0013] The present invention discloses the following technical effects: This invention unlocks the battery pack by driving the locking component to rotate through the unlocking component. The short action path reduces mechanical steps during battery swapping, improving the efficiency of battery pack removal. When a new energy vehicle runs out of power, a battery swapping trolley can be used for rapid battery swapping. The trolley simply needs to reach the area under the vehicle chassis where the battery pack is located. A hydraulic device raises the trolley platform to the chassis position while simultaneously extending the platform outwards, then presses the unlocking component, thereby unlocking the locking component and enabling rapid battery pack removal.

[0014] The snap-lock component designed in this invention can more stably fix the battery pack. Moreover, the locking component is controlled by the unlocking component. Under normal circumstances, the reset mechanism in the unlocking component and the compression mechanism in the locking component form a secondary lock, which can prevent the snap from opening due to bumps during normal driving of the new energy vehicle.

[0015] The invention has a simple overall structure, is easy to process and assemble, and is suitable for integration with power battery packs and vehicle chassis, and has good prospects for industrial application. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the fast locking structure of the present invention; Figure 2 This is a front view of the quick-locking structure of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention in its unlocked state; Figure 4 This is a schematic diagram of the structure in the locked state according to Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of the structure in the unlocked state according to Embodiment 2 of the present invention.

[0018] The components include: 1. Battery pack support; 2. Power battery pack; 3. Receiving slot; 4. Rotary buckle; 5. Snap-fit ​​protrusion; 6. Lock base; 7. Buckle slot; 8. Button cover; 9. Protrusion; and 10. Return spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1 Reference Figures 1-3 This embodiment provides a press-type snap-lock structure, including... Battery pack support 1, with a power battery pack 2 fixedly connected to the top surface of battery pack support 1, the power battery pack 2 being located in the battery compartment set inside the vehicle chassis. Locking assembly, the locking assembly is located on the battery pack support 1, and the locking assembly is located on both sides of the power battery pack 2; The mating components are fixedly connected to the vehicle chassis and are located on both sides of the power battery pack 2 and are correspondingly set with the locking components. The unlocking component is located at the bottom of the battery pack support 1, and the unlocking component is set in correspondence with the locking component.

[0022] The locking component further optimizes the design by including a receiving groove 3 on the battery pack support 1, a rotating buckle 4 rotatably connected in the receiving groove 3, a snap-fit ​​protrusion 5 at the top of the snap-fit ​​4, the bottom surface of the snap-fit ​​protrusion 5 being a load-bearing locking surface, and the top surface of the snap-fit ​​protrusion 5 being a guide slope, and the snap-fit ​​4 being compatible with the mating component.

[0023] The guide ramp is located on the side where the rotating buckle 4 enters the lock base 6. It is used to contact the edge of the buckle or buckle groove 7 of the lock base 6 when the power battery pack 2 is installed upwards, driving the rotating buckle 4 to rotate outwards. The load-bearing locking surface is used to fit against the load-bearing surface of the buckle groove 7 in the locked state, bearing the vertical load of the power battery pack 2 and the impact load during vehicle operation. An anti-disengagement buckle surface is also provided on the outer side of the load-bearing locking surface to prevent the rotating buckle 4 from disengaging in the opposite direction under vibration, braking or bumpy conditions.

[0024] Further optimization of the solution includes a lock base 6 that is fixedly connected to the vehicle chassis. The lock base 6 has a buckle groove 7, and the buckle 4 has a snap-fit ​​protrusion 5 at the top of the buckle located in the buckle groove 7.

[0025] Furthermore, the lock base 6 has an opening and a cavity extending from the opening. The opening allows the rotating buckle 4 to enter the cavity, and the buckle groove 7 is located in the cavity. The rotating buckle 4 cooperates with the buckle groove 7 in the cavity to complete locking and unlocking. A guide rounded corner is provided at the opening, so that even if there is a small lateral positioning deviation when the power battery pack 2 is lifted and installed into the battery compartment, the rotating buckle 4 can be smoothly guided into the cavity along the opening to cooperate with the buckle groove 7.

[0026] The cavity of the lock base 6 is provided with a first limiting surface and a second limiting surface. The first limiting surface is used to limit the rotation angle of the rotating latch 4 in the locked state, so that the rotating latch 4 and the latch groove 7 form a stable bearing fit. The second limiting surface is used to limit the maximum rotation angle of the rotating latch 4 in the unlocked state, preventing the rotating latch 4 from over-rotating and failing to return to its original position. The first and second limiting surfaces can be integrally formed with the lock base 6, or they can be formed by installing a limiting block in the lock base 6.

[0027] The solution is further optimized. The unlocking component includes a button cover 8 that is slidably connected to the bottom surface of the battery pack support 1. A push protrusion is installed on the top of the button cover 8. The push protrusion is in contact with the bottom edge of the rotating buckle 4. Protrusions 9 are provided on both sides of the bottom surface of the battery pack support 1. A return spring 10 is fixedly connected between the protrusions 9 and the bottom of the rotating buckle 4.

[0028] Under normal conditions, the return spring 10 pushes the bottom end of the rotating latch 4 and the button cover 8 towards the center of the battery pack support 1, keeping the rotating latch 4 in the locked position. When the button cover 8 is pushed by the battery swapping trolley, the button cover 8 presses the rotating latch 4 and the return spring 10, causing the rotating latch 4 to rotate to the unlocked position.

[0029] Furthermore, the button cover 8, the return spring 10, and the rotating latch 4 together form a two-stage locking structure. On one hand, the bearing locking surface cooperates with the latch groove 7 to bear the load of the battery pack; on the other hand, the return spring 10 continuously applies force in the locking direction, making it difficult for the rotating latch 4 to open in the reverse direction due to inertia when the vehicle vibrates. Compared with connection methods that rely solely on pins or bolts, this structure can shorten the unlocking stroke while ensuring locking reliability.

[0030] Further optimization of the design includes the installation of a position detection device on the vehicle chassis, which corresponds to the rotating latch 4; a buffer pad is installed at the bottom of the lock base 6. The position detection device detects the locking status of all rotating latches 4. If any rotating latch 4 fails to enter the locking position, the control system will issue an alarm or prevent the vehicle from starting. The buffer pad is located at the contact point between the lock base and the battery pack support 1 to reduce the impact when the power battery pack 2 is installed.

[0031] The design is further optimized by installing a fixed shaft in the receiving groove 3. The fixed shaft passes through the rotating buckle 4 and rotates with the rotating buckle 4. A retaining ring is installed on the fixed shaft. The two retaining rings are located on both sides of the rotating buckle 4 to restrict the rotating buckle 4 from moving axially along the fixed shaft. A wear-resistant bushing is installed between the fixed shaft and the rotating buckle 4 to reduce wear during the battery swapping process.

[0032] Further optimization of the design involves setting multiple sets of locking components, located around the perimeter of the power battery pack 2. By increasing the number of locking components, the load on the power battery pack 2 and the vibration load during vehicle operation can be better distributed, thereby improving the stability of the power battery pack 2 after installation. This design is suitable for power battery packs with larger masses.

[0033] While bolted connections provide high strength, they require individual loosening or tightening of each bolt, resulting in longer operation times during battery swapping. Furthermore, they demand high precision from automated tools, and worn threads can pose safety risks.

[0034] The single pin-type locking structure for securing the battery pack makes unlocking the battery pack relatively straightforward, but the pin needs to maintain a high degree of coaxiality with the socket. When there are assembly errors in the vehicle chassis or battery pack, the pin is prone to jamming. The single pin lacks a guide ramp and a reset secondary locking structure, resulting in weak anti-disengagement reliability under vibration conditions.

[0035] Under simulated vehicle vibration and bump conditions, the anti-detachment buckle surface of this invention forms a reverse limiting relationship with the buckle groove 7, and the return spring 10 continuously applies force in the locking direction, making it difficult for the rotating buckle 4 to open in the reverse direction due to inertia. In contrast, the battery pack is fixed using a single pin-type locking structure, which relies on the fit gap between the pin and the socket. If the gap is too large, it is easy to generate impact noise; if the gap is too small, it is easy to cause jamming during disassembly and assembly. Therefore, this invention has better overall technical performance in terms of quick unlocking, fault-tolerant installation, and anti-detachment during driving.

[0036] The working process of this embodiment: When the battery needs to be replaced, the battery swapping trolley moves to the bottom of the vehicle and supports the power battery pack 2; the platform of the battery swapping trolley rises to below the button cover 8 via a push rod and pushes against the pressure surface; after the button cover 8 is pressed, it moves laterally, and the pushing boss drives the rotating buckle 4 to rotate around the fixed axis; when the free end of the rotating buckle 4 leaves the buckle groove 7 of the lock base 6, the power battery pack 2 is unlocked, and the battery swapping trolley can support the power battery pack 2 to descend and move out of the bottom of the vehicle.

[0037] The battery swapping trolley carrying the new power battery pack 2 lifts the power battery pack 2 into the battery compartment; when the power battery pack 2 reaches the predetermined installation height, the guide slope of the rotating buckle 4 contacts the edge of the buckle groove 7, the reset spring 10 pushes the button cover 8 to reset, the button cover 8 drives the rotating buckle 4 to rotate, the bearing locking surface of the rotating buckle 4 enters the buckle groove 7 and cooperates with the bearing surface of the buckle groove 7, the anti-disengagement buckle surface forms a lock, and finally the power battery pack 2 is locked.

[0038] Example 2 Reference Figures 4-5 This embodiment provides a press-type snap-lock structure. The difference between this embodiment and Embodiment 1 is only that the locking component includes a wave-shaped locking block. One side of the wave-shaped locking block has a wave-shaped locking surface. The wave-shaped locking block slides with the battery pack support 1. The side of the lock base 6 has a wave-shaped bearing surface. The locking surface forms multiple continuous peaks and valleys along the length or vertical direction of the battery pack. When the battery pack is installed in place, the return spring 10 pushes the locking component into the snap-lock groove 7, causing the wave-shaped locking surface to mesh with the matching wave-shaped bearing surface, thus forming a multi-point contact lock. Compared with a single snap-lock surface, the wave-shaped locking structure can disperse the vertical load and vibration impact load of the battery pack, reduce local stress concentration, and improve the reliability of anti-detachment through the mutual limiting between multiple peaks and valleys. During unlocking, the battery swapping trolley simultaneously presses the button cover 8. The button cover 8 drives the locking component out of the wave-shaped bearing surface, separating the wave-shaped locking surface from the matching wave-shaped bearing surface, allowing the battery pack to move downwards out of the battery compartment. This structure is suitable for battery swapping scenarios involving power battery packs with large mass, complex vibration conditions, or where increased locking contact area is required.

[0039] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A press-type snap-lock structure, characterized in that: include A battery pack support (1) is provided, and a power battery pack (2) is fixedly connected to the top surface of the battery pack support (1). The power battery pack (2) is located in the battery compartment provided in the vehicle chassis. Locking assembly, the locking assembly is located on the battery pack support (1), the locking assembly is located on both sides of the power battery pack (2); The mating component is fixedly connected to the vehicle chassis and is located on both sides of the power battery pack (2) and is correspondingly set with the locking component; The unlocking component is located at the bottom of the battery pack support (1) and is correspondingly set with the locking component.

2. The quick-locking structure of the push-button buckle according to claim 1, characterized in that: The locking assembly includes a receiving groove (3) opened on the battery pack support (1), a rotating buckle (4) is rotatably connected in the receiving groove (3), the top of the rotating buckle (4) is provided with a snap-fit ​​protrusion (5), the bottom surface of the snap-fit ​​protrusion (5) is a bearing locking surface, the top surface of the snap-fit ​​protrusion (5) is a guide slope, and the rotating buckle (4) is adapted to the mating assembly.

3. The quick-locking structure of the push-button buckle according to claim 2, characterized in that: The mating assembly includes a lock base (6) that is fixedly connected to the vehicle chassis. A snap-fit ​​groove (7) is provided in the lock base (6). The snap-fit ​​protrusion (5) at the top of the rotating snap (4) is located in the snap-fit ​​groove (7).

4. The quick-locking structure of the push-button buckle according to claim 1, characterized in that: The unlocking component includes a button cover (8) that is slidably connected to the bottom surface of the battery pack support (1). A push protrusion is installed on the top of the button cover (8). The push protrusion is in contact with the bottom edge of the rotating buckle (4). Bosses (9) are provided on both sides of the bottom surface of the battery pack support (1). A reset spring (10) is fixedly connected between the bosses (9) and the bottom of the rotating buckle (4).

5. The quick-locking structure of the push-button buckle according to claim 2, characterized in that: A position detection component is installed on the car chassis, and the position detection component is set in correspondence with the rotating buckle (4); a buffer pad is installed at the bottom of the lock base (6).

6. The quick-locking structure of the push-button buckle according to claim 2, characterized in that: A fixed shaft is provided in the receiving groove (3). The fixed shaft passes through the rotating buckle (4) and rotates with the rotating buckle (4). A retaining ring is installed on the fixed shaft. The two retaining rings are located on both sides of the rotating buckle (4). A wear-resistant bushing is provided between the fixed shaft and the rotating buckle (4).

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