Locking mechanism and electric vehicle

Abstract

This utility model discloses a locking mechanism, relating to the field of electric vehicle parts technology. It mainly includes multiple buckles and multiple slots. Buckles are fixedly mounted on the backrest base plate of the electric vehicle, and slots are provided on the backrest cover. The buckles on the backrest base plate can engage with the slots on the backrest cover, restricting the relative movement of the backrest base plate and the backrest cover. The backrest cover is used for fixed connection with the backrest bracket of the electric vehicle. This utility model also discloses an electric vehicle, including a backrest sponge, a backrest base plate, a backrest cover, a backrest bracket, and the locking mechanism described above. The backrest sponge is fixedly connected to the side of the backrest base plate away from the backrest cover. The locking mechanism provided by this utility model makes the assembly efficiency of the rear backrest high and the cost low.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle parts technology, and in particular to a locking mechanism and an electric vehicle. Background Technology

[0002] In two-wheeled electric vehicles or electric motorcycles, the backrest is a key component providing riding comfort and support. A traditional backrest typically consists of backrest foam, a backrest base, and a backrest cover. The connection between the backrest base and the backrest cover is achieved using a locking mechanism, usually secured with bolts or screws. Typically, there are 4-6 or more connection points along the edges or at key stress points of the backrest base and backrest cover, each requiring a corresponding bolt, nut, or self-tapping screw. During actual assembly, the operator must first precisely align the backrest base and backrest cover, ensuring each connection hole is perfectly aligned. Then, the bolts or screws are inserted one by one through the holes, tightened sequentially using tools such as wrenches and screwdrivers. Due to the large number of holes, alignment often requires repeated adjustments to angle and position; even slight deviations can prevent a screw from being inserted properly. During tightening, to avoid uneven force causing component deformation, torque must be applied gradually in a specific order (e.g., alternating diagonally). It's crucial to avoid tightening any point all at once or allowing excessive differences in tightness between different points. Using screws or bolts to achieve multi-point fixation is cumbersome, affects assembly efficiency, and is costly. Therefore, there is an urgent need for a locking mechanism and an electric vehicle to solve the above-mentioned technical problems. Utility Model Content

[0003] The purpose of this utility model is to provide a locking mechanism and an electric vehicle to solve the problems existing in the prior art, so as to make the assembly efficiency of the backrest high and the cost low.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a locking mechanism, including multiple buckles and multiple slots. The buckles are fixedly mounted on the backrest base plate of the electric vehicle, and the slots are provided on the backrest cover of the electric vehicle. The buckles on the backrest base plate can engage with the slots on the backrest cover, thus restricting the relative movement of the backrest base plate and the backrest cover. The backrest cover is used for fixed connection with the backrest bracket of the electric vehicle; or

[0006] The backrest cover of the electric vehicle is fixedly provided with the buckle, and the backrest base plate of the electric vehicle is provided with a slot. The buckle on the backrest cover can be snapped into the slot of the backrest base plate and restrict the relative movement of the backrest base plate and the backrest cover. The backrest cover is used to be fixedly connected to the backrest bracket of the electric vehicle.

[0007] In some embodiments, a plurality of the buckles are evenly arranged circumferentially along the backrest base plate, and a plurality of the slots are evenly arranged circumferentially along the backrest cover.

[0008] In some embodiments, the buckle is a wedge-shaped buckle, the buckle groove includes an inner hole and a perforated plate, the perforated plate is fixedly connected to the backrest cover, the inner hole is between the perforated plate and the backrest cover, and the wedge-shaped buckle can extend into the inner hole and engage with the side wall of the perforated plate.

[0009] In some embodiments, eight wedge-shaped blocks and eight slots are provided. The backrest cover and the backrest base plate are rectangular structures. A wedge-shaped block is provided at each of the four corners of the backrest base plate, which is a first wedge-shaped block. A second wedge-shaped block is provided between two first wedge-shaped blocks on the same side. A slot is provided at each of the four corners of the backrest cover, which is a first slot. A second slot is provided between two first slots on the same side. The first wedge-shaped blocks are used to engage with the first slots, and the second wedge-shaped blocks are used to engage with the second slots.

[0010] In some embodiments, the wedge-shaped surface of the first wedge-shaped block extends gradually from away from the backrest base plate to near the center of the backrest base plate, the inner opening of the slot faces outward, and the extension direction of the first wedge-shaped block is towards the vertical direction of the backrest base plate.

[0011] In some embodiments, the second wedge-shaped latch includes a lateral latch and a longitudinal latch. The lateral latch is located at the center of the lateral edge of the backrest base plate, and extends in the lateral direction of the backrest base plate. The wedge-shaped surface of the lateral latch gradually extends from away from the backrest base plate to closer to the center of the backrest base plate. The longitudinal latch is located at the center of the vertical edge of the backrest base plate, and extends in the vertical direction of the backrest base plate. The wedge-shaped surface of the longitudinal latch gradually extends from away from the backrest base plate to closer to the center of the backrest base plate.

[0012] This utility model also provides an electric vehicle, including a backrest sponge, a backrest base plate, a backrest cover, a backrest bracket, and a locking mechanism as described above, wherein the backrest sponge is fixedly connected to the side of the backrest base plate away from the backrest cover.

[0013] In some embodiments, a rear cover plate is also included, which is fixedly sleeved on the backrest bracket. The rear cover plate is provided with a through hole, and the backrest back cover is provided with a first threaded hole. A locking bolt can pass through the through hole and be threadedly connected to the first threaded hole. The nut of the locking bolt can abut against the side of the rear cover plate away from the backrest back cover to fix the rear cover plate to the backrest back cover.

[0014] In some embodiments, the backrest base plate is provided with a second threaded hole, and the locking bolt can pass through the through hole and be screwed into the first threaded hole and the second threaded hole in sequence.

[0015] In some embodiments, the nut end of the locking bolt is fixedly fitted with a rotating disc, and the rotating disc has multiple force-applying grooves on its outer periphery.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] The locking mechanism provided by this utility model utilizes the snap-fit ​​between a buckle and a slot to achieve a fixed connection between the backrest base plate and the backrest cover, eliminating the need for bolts and screws. During assembly, simply snapping the buckle into the slot connects the backrest base plate and the backrest cover, making it convenient, quick, and efficient. Furthermore, the buckle is directly mounted on the backrest base plate or backrest cover, requiring no additional components (bolts, screws, etc.), thus reducing costs. Moreover, there is no need to drill holes for bolts or screws in the backrest base plate and backrest cover, nor is there any need to reserve additional space for fastener installation, resulting in a simpler and more compact overall structure. This contributes to a lightweight design for electric vehicle backrests and reduces potential malfunction risks caused by redundant structures. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the backrest installed on the backrest bracket in some embodiments of the present invention, omitting part of the backrest cover;

[0020] Figure 2 This is a rear view of the backrest mounted on the backrest bracket in some embodiments of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the backrest mounted on the backrest bracket in some embodiments of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the backrest base plate in some embodiments of this utility model;

[0023] Figure 5 This is a schematic diagram of the backrest cover in some embodiments of the present invention.

[0024] In the diagram: 1-Backrest sponge; 2-Backrest base plate; 201-Snap fastener; 21-First wedge-shaped buckle; 22-Horizontal snap fastener; 23-Vertical snap fastener; 24-Second threaded hole; 3-Backrest back cover; 31-Slot; 32-First threaded hole; 4-Back cover pressure plate; 5-Backrest bracket; 6-Locking bolt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] The purpose of this utility model is to provide a locking mechanism and an electric vehicle to solve the problems existing in the prior art, so as to make the assembly efficiency of the backrest high and the cost low.

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1-5 As shown, this utility model provides a locking mechanism, including multiple buckles and multiple slots. Buckles are fixedly installed on the backrest base plate 2 of the electric vehicle, and slots are provided on the backrest cover 3 of the electric vehicle. The buckles on the backrest base plate 2 can engage with the slots on the backrest cover 3, restricting the relative movement of the backrest base plate 2 and the backrest cover 3. The backrest cover 3 is used for fixed connection with the backrest bracket 5 of the electric vehicle; or

[0029] The backrest cover 3 of the electric vehicle is fixedly equipped with a buckle, and the backrest base plate 2 of the electric vehicle is equipped with a slot. The buckle on the backrest cover 3 can be snapped into the slot of the backrest base plate 2, thus restricting the relative movement of the backrest base plate 2 and the backrest cover 3. The backrest cover 3 is used to fixally connect to the backrest bracket 5 of the electric vehicle. The backrest base plate 2 and the backrest cover 3 are fixedly connected by the snap-fit ​​of the buckle and the slot, without the need for bolts and screws. During assembly, the connection between the backrest base plate 2 and the backrest cover 3 can be achieved simply by snapping the buckle into the slot. This is convenient, quick, and has high assembly efficiency. Moreover, the buckle is directly set on the backrest base plate 2 or the backrest cover 3. Preferably, it is integrally cast during production, and the connection does not require additional parts (bolts, screws, etc.), resulting in lower costs. Furthermore, there is no need to drill holes for mounting bolts and screws in the backrest base plate 2 and backrest cover 3, nor is there any need to reserve additional space for fastener installation. This makes the overall structure simpler and more compact, which helps to achieve a lightweight design for the electric vehicle backrest and also reduces the potential risk of failure caused by redundant structures. Moreover, after the backrest cover 3 and backrest base plate 2 are connected, the buckles are hidden inside and not exposed, which improves the aesthetics to a certain extent.

[0030] In some embodiments, multiple buckles 201 are evenly arranged circumferentially along the backrest base plate 2, and multiple slots 31 are evenly arranged circumferentially along the backrest cover 3. The evenly distributed buckles 201 and slots 31 can evenly distribute the force between the backrest base plate 2 and the backrest cover 3 to multiple locations across the entire connection surface, preventing excessive local stress that could lead to deformation of the buckles 201, damage to the slots 31, or loosening of the connection. Whether it's vibration during electric vehicle operation, pressure on the backrest, or minor collisions during daily use, the evenly distributed structure can bear the load through multiple contact points, significantly improving the overall connection strength and durability.

[0031] In some embodiments, the buckle 201 is a wedge-shaped buckle, and the slot 31 includes an inner hole and a perforated plate. The perforated plate is fixedly connected to the backrest cover 3, and the inner hole is between the perforated plate and the backrest cover 3. The wedge-shaped buckle can extend into the inner hole and engage with the side wall of the perforated plate. The inclined side of the wedge-shaped buckle has a guiding and self-locking function. When the buckle extends into the inner hole, the wedge structure will gradually slide along the side wall of the perforated plate until the right-angled edge of the wedge-shaped buckle engages with the side wall of the perforated plate. The inclined surface of the wedge-shaped buckle itself has a guiding function, which can guide the buckle to accurately align with the inner hole and smoothly extend during assembly, reducing assembly jamming caused by misalignment.

[0032] In some embodiments, eight wedge-shaped blocks and slots 31 are provided. The backrest cover 3 and the backrest base plate 2 are rectangular structures. A wedge-shaped block 21 is provided at each of the four corners of the backrest base plate 2. A second wedge-shaped block 21 is provided between two first wedge-shaped blocks 21 on the same side. A slot 31 31 is provided at each of the four corners of the backrest cover 3. A second slot 31 31 is provided between two first slots 31 on the same side. The first wedge-shaped blocks 21 are used to engage with the first slots 31, and the second wedge-shaped blocks are used to engage with the second slots 31. The four corners of the rectangular backrest are areas where structural stress is concentrated (such as corners that are prone to torque due to vibration and collision). Providing first wedge-shaped blocks 21 and slots 31 at the four corners can specifically strengthen the connection strength of the corners and directly resist the corner forces unique to the square structure. A second card block / slot 31 is added between the two first card blocks / slots 31 on the same side, which can fill the connection gap in the middle area of ​​the side, so that each side of the entire square circumference forms a three-point fixation at both ends and the middle, ensuring that the four sides of the backrest base plate 2 and the backrest back cover 3 are uniformly and densely constrained, avoiding the problem of loosening and warping in the middle area due to the large span of the side.

[0033] In some embodiments, the wedge-shaped surface of the first wedge-shaped latch 21 extends gradually from away from the backrest base plate 2 to near the center of the backrest base plate 2, the inner hole of the latch groove 31 opens outward, and the extension direction of the first wedge-shaped latch 21 is towards the vertical direction of the backrest base plate 2. The wedge-shaped surface of the first wedge-shaped latch 21 extends towards the center of the backrest base plate 2 (i.e., it gradually slopes inward from the free end to the root). When it is inserted into the inner hole of the latch groove 31 with the opening facing outward, the vertical surface of the first wedge-shaped latch 21 will fit against the side wall of the perforated plate, so that the position of the first wedge-shaped latch 21 and the backrest back cover 3 is relatively fixed.

[0034] In some embodiments, the second wedge-shaped latch includes a transverse latch 22 and a longitudinal latch 23. The transverse latch 22 is located at the center of the transverse edge of the backrest base plate 2, and extends in the transverse direction of the backrest base plate 2. The wedge-shaped surface of the transverse latch 22 gradually extends from away from the backrest base plate 2 to near the center of the backrest base plate 2. The longitudinal latch 23 is located at the center of the vertical edge of the backrest base plate 2, and extends in the vertical direction of the backrest base plate 2. The wedge-shaped surface of the longitudinal latch 23 gradually extends from away from the backrest base plate 2 to near the center of the backrest base plate 2. Horizontal edges (such as the top and bottom edges) are more susceptible to lateral forces (such as the forward and backward pushing and pulling forces when passengers lean against them, and longitudinal vibrations during travel). The horizontal buckle 22 extends laterally, and its wedge-shaped surface, in conjunction with the corresponding slot 31, can directly resist lateral displacement. External forces are transmitted to the backrest cover 3 through the side of the horizontal buckle 22. The design of the wedge-shaped surface extending towards the center can convert lateral forces into centripetal pre-tightening forces, preventing the horizontal edges from warping due to excessive force. Vertical edges (such as the left and right edges) are more susceptible to vertical forces (such as the lateral forces from side collisions, and compressive stress during assembly). The vertical buckle 23 extends vertically and can accurately bear vertical forces. The centripetal tendency of the wedge-shaped surface can strengthen the fit between the vertical edge and the back cover, preventing the vertical edge from opening outward. The cooperation between the horizontal buckle 22 and the vertical buckle 23 reduces the risk of breakage to a certain extent. If all buckles face the same direction, breakage will be more likely. However, the relatively perpendicular arrangement of the horizontal buckle 22 and the vertical buckle 23 in this embodiment improves structural rigidity and reduces the risk of breakage.

[0035] This utility model also provides an electric vehicle, including a backrest sponge 1, a backrest base plate 2, a backrest cover 3, a backrest bracket 5, and the locking mechanism in Embodiment 1. The backrest sponge 1 is fixedly connected to the side of the backrest base plate 2 away from the backrest cover 3. Specifically, the backrest sponge 1 and the backrest base plate 2 are fixed by nail guns.

[0036] In some embodiments, the electric vehicle further includes a rear cover plate 4, which is fixedly sleeved on the backrest bracket 5. The rear cover plate 4 has a through hole, and the backrest cover 3 has a first threaded hole 32. A locking bolt 6 can pass through the through hole and be threadedly connected to the first threaded hole 32. The nut of the locking bolt 6 can abut against the side of the rear cover plate 4 away from the backrest cover 3 to fix the rear cover plate 4 and the backrest cover 3 in a fixed connection. The rear cover plate 4 is fixedly sleeved on the backrest bracket 5 to form a stable load-bearing base. The locking bolt 6 passes through the through hole and is threadedly connected to the first threaded hole 32 of the backrest cover 3. The axial preload of the bolt presses the backrest cover 3 onto the rear cover plate 4. The connection strength is higher than that of simple snap-fit ​​or other non-rigid connections. It can effectively resist the vibration, impact and pressure generated by the passenger leaning on the backrest during the operation of the electric vehicle, ensuring the long-term stability of the relative position of the backrest cover 3 and the backrest bracket 5, and avoiding loosening or displacement. During assembly, simply pass the locking bolt 6 through the through hole of the rear cover pressure plate 4 and screw it into the first threaded hole 32 near the rear cover 3. The operation is simple and does not require complicated tools or professional skills, meeting the high-efficiency requirements of industrial production.

[0037] In some embodiments, the backrest base plate 2 is provided with a second threaded hole 24, through which the locking bolt 6 can pass and be screwed into the first threaded hole 32 and the second threaded hole 24 in sequence. The back cover pressure plate 4 (fixed to the backrest bracket 5), the backrest back cover 3, and the backrest base plate 2 are rigidly connected by the same locking bolt 6. Compared with the structure where the bolt only connects the back cover pressure plate 4 and the backrest back cover 3, this can avoid relative displacement caused by gaps between the components, ensuring that the backrest as a whole acts as a rigid unit to bear external forces. At the same time, the buckle and the locking bolt 6 can lock the backrest back cover 3 and the backrest base plate 2 simultaneously. The double constraint can effectively compensate for the risk of loosening that may occur during long-term use with a single buckle connection.

[0038] In some embodiments, the nut end of the locking bolt 6 is fixedly fitted with a screwing disc, and the outer periphery of the screwing disc is provided with multiple force-applying grooves. The force-applying grooves are ergonomically designed so that the operator can apply force with their fingers without relying on tools such as wrenches and screwdrivers, making installation and disassembly convenient.

[0039] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A locking mechanism, characterized in that: The backrest includes multiple buckles and multiple slots. The buckles are fixedly mounted on the bottom plate of the electric backrest, and the slots are provided on the backrest cover. The buckles on the bottom plate can engage with the slots on the backrest cover, restricting the relative movement of the bottom plate and the backrest cover. The backrest cover is used for fixed connection with the electric backrest bracket; or The backrest cover of the electric vehicle is fixedly provided with the buckle, and the backrest base plate of the electric vehicle is provided with a slot. The buckle on the backrest cover can be snapped into the slot of the backrest base plate and restrict the relative movement of the backrest base plate and the backrest cover. The backrest cover is used to be fixedly connected to the backrest bracket of the electric vehicle.

2. The locking mechanism according to claim 1, characterized in that: The plurality of buckles are evenly arranged along the circumference of the backrest base plate, and the plurality of slots are evenly arranged along the circumference of the backrest cover.

3. The locking mechanism according to claim 1, characterized in that: The buckle is a wedge-shaped buckle, and the buckle groove includes an inner hole and a perforated plate. The perforated plate is fixedly connected to the back cover of the backrest. The inner hole is between the perforated plate and the back cover of the backrest. The wedge-shaped buckle can extend into the inner hole and engage with the side wall of the perforated plate.

4. The locking mechanism according to claim 3, characterized in that: There are eight wedge-shaped locking blocks and eight locking slots. The backrest cover and the backrest base plate are rectangular structures. Each of the four corners of the backrest base plate is provided with a wedge-shaped locking block, which is a first wedge-shaped locking block. A second wedge-shaped locking block is provided between two first wedge-shaped locking blocks on the same side. Each of the four corners of the backrest cover is provided with a locking slot, which is a first locking slot. A second locking slot is provided between two first locking slots on the same side. The first wedge-shaped locking blocks are used to engage with the first locking slots, and the second wedge-shaped locking blocks are used to engage with the second locking slots.

5. The locking mechanism according to claim 4, characterized in that: The wedge-shaped surface of the first wedge-shaped block extends from away from the backrest base plate to near the backrest base plate and gradually toward the center of the backrest base plate. The inner hole of the slot opens outward, and the extension direction of the first wedge-shaped block is toward the vertical direction of the backrest base plate.

6. The locking mechanism according to claim 4, characterized in that: The second wedge-shaped latch includes a horizontal latch and a vertical latch. The horizontal latch is located at the center of the horizontal edge of the backrest base plate, and extends in the horizontal direction of the backrest base plate. The wedge-shaped surface of the horizontal latch gradually extends from away from the backrest base plate to closer to the center of the backrest base plate. The vertical latch is located at the center of the vertical edge of the backrest base plate, and extends in the vertical direction of the backrest base plate. The wedge-shaped surface of the vertical latch gradually extends from away from the backrest base plate to closer to the center of the backrest base plate.

7. An electric vehicle, characterized in that: It includes a backrest sponge, a backrest base plate, a backrest cover, a backrest bracket, and a locking mechanism as described in any one of claims 1-6, wherein the backrest sponge is fixedly connected to the side of the backrest base plate away from the backrest cover.

8. The electric vehicle according to claim 7, characterized in that: It also includes a rear cover plate, which is fixedly sleeved on the backrest bracket. The rear cover plate is provided with a through hole, and the backrest back cover is provided with a first threaded hole. A locking bolt can pass through the through hole and be threadedly connected to the first threaded hole. The nut of the locking bolt can abut against the side of the rear cover plate away from the backrest back cover to fix the rear cover plate to the backrest back cover.

9. The electric vehicle according to claim 8, characterized in that: The backrest base plate is provided with a second threaded hole, and the locking bolt can pass through the through hole and be screwed into the first threaded hole and the second threaded hole in sequence.

10. The electric vehicle according to claim 8, characterized in that: The nut end of the locking bolt is fixedly fitted with a rotating disc, and the rotating disc has multiple force-applying grooves on its outer periphery.

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