A connecting structure and a passenger vehicle

Abstract

The utility model discloses a connecting structure and passenger car relates to vehicle structure technical field, and connecting structure includes first connecting piece and second connecting piece, and first connecting piece is provided with connecting hole, and second connecting piece includes inserting column, limit cap and tooth ring, and limit cap connects one end of inserting column and both are same central shaft arrangement, and the diameter of limit cap is greater than the diameter of inserting column, and inserting column is inserted in connecting hole, and tooth ring is sleeved in the outer wall of inserting column and is in interference fit with connecting hole. The utility model provides connecting structure including first connecting piece and second connecting piece can be arranged in frame and battery pack respectively to make first connecting piece and second connecting piece can make battery pack and frame connect after connecting. Second connecting piece can be directly inserted with first connecting piece, and tooth ring is in interference fit with connecting hole, and through the mechanical engagement of tooth ring, makes the connection of first connecting piece and second connecting piece very stable, and battery pack also does not appear loose after long time use.

Description

Technical Field

[0001] This utility model relates to the field of vehicle structure technology, specifically to a connection structure and a passenger vehicle. Background Technology

[0002] Currently, battery packs in large vehicles such as passenger cars typically consist of multiple components connected to the vehicle frame to secure the battery pack. These connections between components and the frame are usually made using welding. Because the battery pack is not only a critical component for extending the driving range of a passenger vehicle but also involves safety, the connection between the battery pack and the frame requires high precision, especially after prolonged vehicle use. The battery pack must not become loose, otherwise it will affect the vehicle's driving safety.

[0003] However, existing passenger car battery packs are installed on the vehicle frame using a nut-sleeve threaded connection. The nut-sleeve part is connected by arc welding. After arc welding, there will be residual stress and low-melting-point eutectic, which will cause cracks after long-term use, leading to the quality risk of the battery pack becoming loose. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a connection structure and passenger vehicle to solve the technical problem that in the prior art, the battery pack of the passenger vehicle is installed on the frame by means of a nut-sleeve threaded connection, wherein the nut-sleeve part is connected by arc welding. After arc welding, there will be residual stress and low melting point eutectic, which will cause cracks after long-term use, resulting in the quality risk of the battery pack becoming loose.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a connection structure, comprising: The first connector has a connecting hole; and The second connector includes a plug, a limiting cap, and a toothed ring. The limiting cap is connected to one end of the plug and the two are arranged on the same central axis. The diameter of the limiting cap is larger than the diameter of the plug. The plug is inserted into the connecting hole. The toothed ring is sleeved on the outer wall of the plug and is interference-fitted with the connecting hole.

[0006] In some embodiments, the toothed ring includes a ring body and a plurality of teeth, the plurality of teeth being evenly arranged around the periphery of the ring body, all the teeth having parallel length directions to each other, and the side of each tooth facing away from the ring body being planar or arc-shaped.

[0007] In some embodiments, the end of the tooth away from the limiting cap has a guide slope, and the distance between the guide slope and the central axis of the ring decreases in the direction in which the tooth is inserted into the connecting hole.

[0008] In some embodiments, the inclination angle of the guide ramp is 15°-25°.

[0009] In some embodiments, one end of the ring body along its central axis is connected to the limiting cap.

[0010] In some embodiments, the teeth completely cover the tooth ring along its length extension direction.

[0011] In some embodiments, the end of the plug-in post away from the limiting cap has an annular notch, which is engaged with the first connector.

[0012] In some embodiments, the first connector has a cavity, and the cavity is provided with a plurality of parallel and spaced-apart load-bearing vertical ribs.

[0013] In some embodiments, the first connector has a plurality of through-holes for weight reduction along its length.

[0014] Secondly, this utility model also provides a passenger vehicle, including a battery pack, a frame, and a plurality of the above-mentioned connecting structures, wherein the first connecting member is disposed on the frame, the second connecting member is disposed on the battery pack, and the first connecting member and the second connecting member are interference-fitted.

[0015] Compared with the prior art, the connection structure provided by this utility model includes a first connector and a second connector, which can be respectively disposed on the vehicle frame and the battery pack, so that the battery pack can be connected to the vehicle frame after the first connector and the second connector are connected. During the connection process, the second connector can be directly inserted into the first connector, and the toothed ring of the second connector is interference-fitted with the connecting hole of the first connector. Through the mechanical engagement of the toothed ring, the connection between the first connector and the second connector is very stable, and the battery pack will not loosen after long-term use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the connection structure provided in an embodiment of the present utility model; Figure 2 This is an exploded view of the connection structure provided in an embodiment of the present utility model; Figure 3 This is a structural schematic diagram of the second connector provided in an embodiment of the present invention from one perspective; Figure 4 This is a structural schematic diagram of the second connector provided in another embodiment of the present utility model; Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the diagram. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] To address the technical problem in existing passenger vehicle battery pack installation methods where the battery pack is mounted on the vehicle frame via a nut-sleeve threaded connection, with the nut-sleeve portion connected by arc welding, residual stress and low-melting-point eutectic buildup can occur after arc welding, leading to cracks and loosening of the battery pack over time, this invention provides a connection structure that achieves a stable connection between the battery pack and the vehicle frame through an interference fit with a toothed ring, making the connection very secure and less prone to loosening.

[0019] It should be noted that the connection structure described in this utility model is used in, but not limited to, passenger vehicles. For ease of explanation, this utility model only uses the application of the connection structure in passenger vehicles as an example. The principle of the connection structure applied to other types of equipment is essentially the same as that applied to passenger vehicles, and will not be described in detail here.

[0020] Please see Figures 1 to 4 , Figure 1 This is a schematic diagram of the connection structure in one embodiment of the present invention. The connection structure includes a first connector 1 and a second connector 2. The first connector 1 has a connection hole 11. The second connector 2 includes a plug post 21, a limiting cap 22 and a toothed ring 23. The limiting cap 22 is connected to one end of the plug post 21 and the two are arranged on the same central axis. The diameter of the limiting cap 22 is larger than the diameter of the plug post 21. The plug post 21 is inserted into the connection hole 11. The toothed ring 23 is sleeved on the outer wall of the plug post 21 and is interference-fitted with the connection hole 11.

[0021] In this embodiment, the first connector 1 is an integral component, the main body of which is a composite structure made of metal or high-strength metal material with a certain thickness and strength. The connecting hole 11 of the first connector 1 is circular in shape, and the diameter of the connecting hole 11 can be designed according to the size of the insertion post 21 to ensure that the insertion post 21 can be smoothly inserted and achieve an interference fit with the toothed ring 23. The inner wall of the connecting hole 11 is precision machined, and the surface roughness meets the design requirements to ensure that sufficient friction and mechanical engagement force can be generated between it and the toothed ring 23.

[0022] The second connector 2 has a cylindrical insert 21 with an outer diameter slightly smaller than the diameter of the connecting hole 11, allowing for smooth insertion into the hole. A limiting cap 22 is attached to one end of the insert 21, and both are coaxially aligned to ensure precise alignment during assembly. The limiting cap 22 has a larger diameter than the insert 21, its main function being to prevent the insert 21 from inserting excessively into the connecting hole 11, thus acting as a limit. The outer surface of the limiting cap 22 can be designed as a smooth cylindrical surface to reduce friction during assembly.

[0023] The toothed ring 23 is sleeved on the outer wall of the insertion post 21, and the two can be integrally formed. The outer diameter of the toothed ring 23 is slightly larger than the diameter of the connecting hole 11, thereby achieving an interference fit when inserted into the connecting hole 11. The outer surface of the toothed ring 23 is designed with multiple teeth 232. Figure 5 As shown in the diagram, teeth 232 are evenly distributed around the periphery of the toothed ring 23, with their length direction parallel to the axis of the toothed ring 23. The shape of the teeth 232 can be planar or arc-shaped, and the specific shape is designed according to actual needs.

[0024] During assembly, the toothed ring 23 is first fitted onto the outer wall of the insertion post 21 to ensure coaxiality between the toothed ring 23 and the insertion post 21. Then, the insertion post 21 is aligned with the connecting hole 11 on the first connector 1 and slowly inserted. During insertion, the guide slope of the teeth 232 on the toothed ring 23 contacts the inner wall of the connecting hole 11, gradually guiding the teeth 232 into the connecting hole 11. As the insertion depth increases, an interference fit gradually forms between the teeth 232 and the inner wall of the connecting hole 11, generating a mechanical interlocking force, thereby tightly connecting the first connector 1 and the second connector 2 together. Once the insertion post 21 is fully inserted, the limiting cap 22 contacts the surface of the first connector 1 to prevent over-insertion of the insertion post 21, ensuring the stability and reliability of the connection structure.

[0025] In one embodiment, please refer to Figure 5 The toothed ring 23 includes a ring body 231 and multiple teeth 232. The teeth 232 are evenly arranged around the periphery of the ring body 231, and all the teeth 232 are parallel to each other in their length direction. The side of each tooth 232 facing away from the ring body 231 is flat or curved. This design allows the teeth 232 to fit tightly against the inner wall of the connecting hole 11, further enhancing the stability of the connection. When the insertion post 21 is inserted into the connecting hole 11, the teeth 232 and the inner wall of the connecting hole 11 form an interference fit. Through the mechanical interlocking action of the teeth 232, the connection between the first connector 1 and the second connector 2 is very stable, and will not loosen even when subjected to various forces during vehicle operation.

[0026] In one embodiment, please refer to Figure 5The end of the tooth 232 furthest from the limiting cap 22 has a guide slope 233. In the direction in which the tooth 232 is inserted into the connecting hole 11, the distance between the guide slope 233 and the central axis of the ring 231 decreases. In this embodiment, the guide slope 233 helps guide the tooth 232 smoothly into the connecting hole 11 during insertion, making the insertion operation more convenient. When the insertion post 21 is inserted into the connecting hole 11, the guide slope 233 first contacts the inner wall of the connecting hole 11. During insertion, the guide slope 233 gradually guides the tooth 232 into the connecting hole 11 until the tooth 232 and the inner wall of the connecting hole 11 form an interference fit.

[0027] In one embodiment, please refer to Figure 5 The inclination angle of the guide slope 233 is 15°-25°. Multiple experiments have verified that when the inclination angle of the guide slope 233 is within this range, it ensures that the teeth 232 can be smoothly inserted into the connecting hole 11, and also ensures sufficient interference fit between the teeth 232 and the inner wall of the connecting hole 11, thus achieving a good connection effect. If the inclination angle of the guide slope 233 is too large, it may lead to insufficient interference fit between the teeth 232 and the inner wall of the connecting hole 11, affecting the stability of the connection; if the inclination angle of the guide slope 233 is too small, it may increase the difficulty of insertion and hinder rapid assembly.

[0028] In one embodiment, please refer to Figure 4 One end of the ring 231 along its central axis is connected to the limiting cap 22. This connection method in this embodiment makes the toothed ring 23 and the limiting cap 22 form an integral structure, enhancing the overall stability of the second connector 2. During the connection process, the limiting cap 22 can limit the insertion post 21, preventing the insertion post 21 from being over-inserted into the connecting hole 11, thereby ensuring the correct assembly of the connection structure.

[0029] In one embodiment, please refer to Figure 4 and Figure 5 The tooth 232 completely covers the tooth ring 23 along its length. In this embodiment, the tooth 232 can form a longer contact length with the inner wall of the connecting hole 11, further improving the stability of the connection. When the tooth 232 forms an interference fit with the inner wall of the connecting hole 11, the entire length of the tooth 232 can be tightly fitted with the inner wall of the connecting hole 11, thereby generating greater friction and biting force, effectively preventing relative movement between the first connector 1 and the second connector 2.

[0030] In one embodiment, please refer to Figure 4The end of the insertion post 21 furthest from the limiting cap 22 has an annular notch 211, which engages with the first connector 1. The annular notch 211 provides an additional limiting function for the connection structure. When the insertion post 21 is inserted into the connecting hole 11 and reaches the predetermined position, the inner wall of the first connector 1 engages with the annular notch 211, further restricting the axial movement of the insertion post 21 and enhancing the stability of the connection structure. This engaging structure, combined with the interference fit of the toothed ring 23, makes the connection between the first connector 1 and the second connector 2 more robust and reliable.

[0031] In one embodiment, please refer to Figure 2 The first connector 1 has a cavity 12, and the cavity 12 is provided with a plurality of parallel and spaced-apart load-bearing vertical ribs 13. The load-bearing vertical ribs 13 can enhance the structural strength of the first connector 1, enabling it to better withstand the weight of the battery pack and various forces generated during vehicle operation. At the same time, the design of the cavity 12 can reduce the weight of the first connector 1, thereby reducing the overall weight of the commercial vehicle and improving the vehicle's energy efficiency ratio.

[0032] In one embodiment, please refer to Figure 2 The first connector 1 has multiple through-holes 14 extending along its length. The design of the through-holes 14 further reduces the weight of the first connector 1 without affecting its structural strength. In this embodiment, by reasonably arranging the position and size of the through-holes 14, the weight of the first connector 1 can be reduced to the maximum extent while ensuring that it meets the usage requirements, thereby achieving lightweight design of commercial vehicles.

[0033] Secondly, this utility model also provides a passenger vehicle, including a battery pack, a frame, and multiple aforementioned connecting structures. A first connecting member 1 is disposed on the frame, and a second connecting member 2 is disposed on the battery pack. The first connecting member 1 and the second connecting member 2 are interference-fitted. By adopting the connecting structure of this utility model, the connection between the battery pack and the frame of the commercial vehicle is more stable and reliable, effectively avoiding thermal cracking problems caused by welding processes, thereby improving the vehicle's driving safety and service life. In practical applications, the number and distribution of connecting structures can be rationally selected according to the size and weight of the battery pack to ensure a good connection effect between the battery pack and the frame.

[0034] The second connector 2 has a through hole 24 along its central axis. The through hole 24 can be used to increase the connection area between the second connector 2 and the battery pack, so that the battery pack and the second connector 2 can be stably connected. The connection method between the two is not limited. For example, the battery pack can be interference-fitted with the through hole 24 through its own components.

[0035] To better understand this utility model, the following is combined with... Figures 1 to 5The technical solution of this utility model is described in detail below: The connection structure provided by this utility model includes a first connector 1 and a second connector 2, which can be respectively disposed on the vehicle frame and the battery pack of a passenger vehicle, so that the battery pack can be connected to the vehicle frame after the first connector 1 and the second connector 2 are connected. During the connection process, the second connector 2 can be directly inserted into the first connector 1. The toothed ring 23 of the second connector 2 is interference-fitted with the connecting hole 11 of the first connector 1. Through the mechanical engagement of the toothed ring 23, the connection between the first connector 1 and the second connector 2 is very stable, and the battery pack will not loosen after long-term use.

[0036] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A connection structure, characterized in that, include: The first connector has a connecting hole; and The second connector includes a plug, a limiting cap, and a toothed ring. The limiting cap is connected to one end of the plug and the two are coaxially arranged. The diameter of the limiting cap is larger than the diameter of the plug. The plug is inserted into the connecting hole. The toothed ring is sleeved on the outer wall of the plug and is interference-fitted with the connecting hole.

2. The connection structure according to claim 1, characterized in that, The toothed ring includes a ring body and a plurality of teeth. The plurality of teeth are evenly arranged around the periphery of the ring body. The length directions of all the teeth are parallel to each other, and the side of each tooth facing away from the ring body is planar or arc-shaped.

3. The connection structure according to claim 2, characterized in that, The end of the tooth away from the limiting cap has a guide slope, and the distance between the guide slope and the central axis of the ring decreases in the direction in which the tooth is inserted into the connecting hole.

4. The connection structure according to claim 3, characterized in that, The inclination angle of the guide ramp is 15°-25°.

5. The connection structure according to claim 2, characterized in that, One end of the ring along its central axis is connected to the limiting cap.

6. The connection structure according to claim 5, characterized in that, The teeth completely cover the tooth ring along its length extension direction.

7. The connection structure according to claim 1, characterized in that, The end of the plug-in post away from the limiting cap has an annular notch, which is engaged with the first connector.

8. The connection structure according to claim 1, characterized in that, The first connector has a cavity, and the cavity is provided with a plurality of parallel and spaced load-bearing vertical ribs.

9. The connection structure according to claim 1, characterized in that, The first connector has multiple through holes for weight reduction along its length.

10. A passenger vehicle, characterized in that, It includes a battery pack, a frame, and multiple connection structures as described in any one of claims 1-9, wherein the first connector is disposed on the frame, the second connector is disposed on the battery pack, and the first connector and the second connector are interference-fitted.

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