Connecting structure of metal support and die-casting carriage and vehicle
Through the combined design of floating nut plate and connecting bolts, the problem of varying material thickness of aluminum alloy car box is solved, a stable connection structure is achieved, adapting to a variable working environment, and improving driving safety and vehicle use experience.
Patent Information
- Application Number
- CN202421032410.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-05-13
AI Technical Summary
Due to the problem of varying material thickness, the connection with other components is not stable enough, and there is a risk of failure, which affects driving safety and vehicle use experience.
A connection structure between a metal bracket and a die-cast vehicle box is designed, using a combination of a floating nut plate and a connecting bolt. The box is clamped under elastic action through the reference surface and overlapping surface to form a uniform fixed area to ensure the lock of the connecting bolt. Tighten to achieve stable connections.
It realizes stable and effective connections in areas with uneven thicknesses, adapts to slight deformation under different temperatures and loads, improves the stability and assembly efficiency of connections, reduces manufacturing costs, and is suitable for compact vehicles and complex application scenarios.
Smart Images
Figure CN222136859U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, in particular to a connection structure of a metal bracket and a die-casting column and a vehicle. Background Art
[0002] In the process of vehicle production, in order to improve the integrity and structural strength of the car body structure, it is usually produced by aluminum alloy die-casting. However, there are usually other connection structures around the car body, such as metal brackets. At this time, due to the presence of reinforcing ribs on the back of the rear pillar of the aluminum alloy die-cast car body, the thickness of the connection surface is uneven. Due to the limitation of its wall thickness, some fixings such as rivet nuts or pressure rivet nuts that require equal wall thickness connection cannot be arranged. If the reinforcing ribs are directly tapped, the threads will not meet the connection strength requirements due to the limitation of the aluminum alloy material. The above problems result in the current unstable connection at the corresponding position, and there is a certain risk of failure, which has a certain impact on driving safety and customer experience.
[0003] Therefore, for the body structural parts formed by aluminum alloy die-casting, how to achieve stable and effective connection with other parts in areas with uneven material thickness is a technical problem that needs to be solved urgently by technical personnel in this field. Utility Model Content
[0004] The utility model provides a connection structure of a metal bracket and a die-casting column and a vehicle.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] In a first aspect, the utility model provides a connection structure between a metal bracket and a die-casting vehicle box, comprising a bracket, a box body and a connecting piece, wherein the connecting piece is used to fixedly connect the bracket and the box body;
[0007] The connecting member includes a connecting bolt and a nut plate, the connecting bolt passes through the bracket, the box body and the nut plate and is threadedly connected to the nut plate, the nut plate includes a reference surface and a lap surface that are relatively floatingly arranged, the reference surface and the lap surface are clamped on opposite sides of the end of the box body and clamp the box body under elastic action.
[0008] Optionally, in the above-mentioned connection structure, the top surface of the reference surface contacts the bracket, the bottom surface contacts the box body, and a positioning pressure plate is provided on the reference surface, the positioning pressure plate is elastically connected to the reference surface, and the positioning pressure plate pops up toward the box body when no external force is applied.
[0009] Optionally, in the above connection structure, the positioning pressing plate is a U-shaped structure and is arranged to surround the connection bolt, and two end heads of the opening end of the positioning pressing plate are fixedly connected to the reference surface.
[0010] Optionally, in the above-mentioned connection structure, the overlapping surface includes a connecting arm and a docking portion, one end of the connecting arm is connected to the reference plane and forms a U-shaped clamping structure with the reference plane, the docking portion is arranged on the connecting arm and spaced apart from the reference plane, and the docking portion is used to lock the connecting bolt.
[0011] Optionally, in the above-mentioned connection structure, the docking portion includes a guide section with a hollow cone configuration and a locking section with a cylindrical configuration, the end of the guide section with a larger circular surface is arranged toward the reference plane, the end with a smaller circular surface has the same diameter as the locking section and is docked with it, and a thread is provided inside the locking section to cooperate with the thread of the connecting bolt.
[0012] Optionally, in the above connection structure, the connection arm is a cantilever structure, and the end portion thereof connected to the reference plane is made of elastic material so that the reference plane and the docking portion are relatively floated.
[0013] Optionally, in the above connection structure, the connection arm is fixedly arranged relative to the reference plane, an elastic sheet is extended from the connection arm, and the docking portion is fixedly arranged on the elastic sheet to float relative to the reference plane.
[0014] Optionally, in the above connection structure, a recessed portion is provided on a side of the box body that contacts the overlapping surface, and two ends of the overlapping surface abut against side walls of the recessed portion.
[0015] Optionally, in the above connection structure, a flat washer is provided between the head of the connection bolt and the plate surface of the bracket.
[0016] In a second aspect, the utility model provides a vehicle, which includes a connection structure between a metal bracket and a die-cast vehicle box provided by any one of the above embodiments.
[0017] It can be seen from the above technical scheme that the connection structure provided by the utility model, in order to solve the problem of uneven thickness of the box body due to the aluminum alloy die-casting process, clamps the box body through a nut plate with a floating effect within a certain range, and forms a fixed area with uniform thickness on the box body for locking by the connecting bolts. The floating reference plane and overlap surface clamp the box body, and the connecting bolts pass through the box body, the through holes on the bracket and the nut plate to achieve an effective and stable connection between the box body and the bracket. Due to the ingenious design of the connecting parts, the entire connection structure occupies less space, which helps to achieve a more efficient layout in a limited space, and is particularly suitable for compact vehicles or peripheral structure designs. At the same time, the design of the connecting bolts and nut plates allows quick assembly and disassembly, which can significantly improve assembly efficiency and reduce manufacturing costs on the production line. In addition, the floating design of the nut plate enables it to adapt to the slight deformation of the box body under different temperatures and loads, thereby maintaining the stability of the connection and meeting the changing working environment and complex application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are only some examples or embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work, and the utility model can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.
[0019] Figure 1 It is a schematic diagram of the connection structure provided by the embodiment of the utility model;
[0020] Figure 2 It is a schematic diagram of the connection structure of the connecting bolt and the nut plate;
[0021] Figure 3 is a front view of the nut plate structure;
[0022] Figure 4 It is an axonometric view of the nut plate structure;
[0023] Figure 5 for Figure 4 A top view of
[0024] Figure 6 It is a front view of the connecting arm structure in the nut plate structure;
[0025] Figure 7 This is the axonometric view of the nut plate structure in the other direction.
[0026] Among them, 10-bracket; 20-box; 30-connecting piece; 310-connecting bolt; 320-nut plate; 3210-reference surface; 32110-positioning pressure plate; 3220-lap surface; 32210-connecting arm; 32220-elastic sheet; 32230-docking part; 32240-guide section; 32250-locking section; 330-flat washer. DETAILED DESCRIPTION
[0027] With the development of intelligent vehicle design, vehicles play an increasingly important role in people's daily lives. During the production process of vehicles, since the car body is mostly a die-cast structure, when the connection with the surrounding brackets is unstable, problems such as abnormal noise will occur, which affects the customer's car experience.
[0028] In order to make the technical personnel in this field better understand the present invention, the embodiments of the present invention are described below with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary for the solutions of the utility model described in the claims.
[0029] See also Figure 1-7 The utility model embodiment provides a connection structure to realize the connection between the metal bracket and the die-cast car box. Specifically, the connection structure between the metal bracket and the die-cast car box includes a bracket 10, a box body 20 and a connecting piece 30, wherein the box body 20 is a die-cast structure on the car box, and one end of the box body 20 is designed with a through hole for connection. The bracket 10 is a metal bracket that needs to be connected on the box body 20, and one end of the bracket 10 is also designed with a through hole to dock with the through hole on the box body 20 during assembly; the connecting piece 30 for connecting the box body 20 and the bracket 10 specifically includes a connecting bolt 310 and a nut plate 320. The connecting bolt 310 is preferably a high-strength steel bolt, and its diameter matches the size of the through hole of the bracket 10 and the through hole of the box body 20 to ensure the firmness of the connection.
[0030] The connecting bolt 310 passes through the through holes of the bracket 10 and the box body 20, and is finally connected to the threaded portion of the nut plate 320. In particular, the nut plate 320 is specifically designed to have a structure with two planes that can float relatively. The two relatively floating planes are the reference plane 3210 and the overlapping plane 3220. Specifically, the reference plane 3210 is located on one side of the box body 20, and the overlapping plane 3220 is located on the other side of the box body 20 facing away from the reference plane 3210. The two are connected by an elastic element, such as a spring, elastic plastic, elastic metal sheet, etc., so that the two can be in a certain When the connection structure is assembled, the reference surface 3210 and the overlapping surface 3220 of the nut plate 320 are clamped on both sides of the end of the box body 20. Through the elastic effect, the reference surface 3210 and the overlapping surface 3220 can tightly clamp the end of the box body 20. At this time, the nut plate 320 provides a connection area of equal thickness for the fixation of the connecting bolt 310 on the box body 20 structure with uneven thickness through the setting of the reference surface 3210 and the overlapping surface 3220, so that the connecting bolt 310 can realize the effective connection between the bracket 10 and the box body 20.
[0031] It should also be noted that while the connecting bolt 310 is threadedly tightened, the elastic element that provides floating effect for the reference surface 3210 and the overlapping surface 3220 will continue to be compressed, thereby providing continuous clamping force to ensure the connection stability between the box body 20 and the bracket 10.
[0032] The connection structure provided by the embodiment of the utility model aims at solving the problem of uneven thickness of the box body 20 due to the aluminum alloy die-casting process. The box body 20 is clamped by a nut plate 320 with a floating effect within a certain range, and a fixed area with uniform thickness is formed on the box body 20 for locking by the connecting bolt 310. The floating reference surface 3210 and the overlapping surface 3220 clamp the box body 20. It should be noted that the floating setting of the reference surface 3210 and the overlapping surface 3220 means that the reference surface 3210 and the overlapping surface 3220 can move freely within a certain range while maintaining the connection state. The floating range is designed according to the actual working conditions so as to be able to adapt to the uneven and flat connection surface of the structural surface to adapt to a certain thickness of the use plane. The difference improves the versatility of the connection structure; the connecting bolt 310 passes through the box body 20, the through hole on the bracket 10 and the nut plate 320 to achieve an effective and stable connection between the box body 20 and the bracket 10. Due to the clever design of the connector 30, the entire connection structure occupies less space, which helps to achieve a more efficient layout in a limited space, and is particularly suitable for compact vehicles or peripheral structure designs. At the same time, the design of the connecting bolt 310 and the nut plate 320 allows for quick assembly and disassembly, which can significantly improve assembly efficiency and reduce manufacturing costs on the production line. In addition, the floating design of the nut plate 320 enables it to adapt to slight deformations of the box body 20 under different temperatures and loads, thereby maintaining the stability of the connection and meeting the needs of changing working environments and complex application scenarios.
[0033] In order to further optimize the above technical solution, in some embodiments of the present invention, the top surface of the reference surface 3210 is used to contact the bracket 10, and the bottom surface of the reference surface 3210 is used to contact the box body 20. Here, the top surface and the bottom surface refer to two opposite surfaces on the reference surface 3210. The reference surface 3210 can be designed as a plane or a surface with a slight curvature to ensure close contact with the bracket 10 and the box body 20. At the same time, a positioning pressing piece 32110 is also provided on the reference surface 3210. The positioning pressing piece 32110 is an elastic component, which is elastically connected to the reference surface 3210. The connection is capable of changing the position of the main area relative to the reference surface 3210. The main function of the positioning pressure piece 32110 is to provide accurate guidance and positioning when the connecting bolt 310 passes through the bracket 10 and the box body 20, to ensure that the bolt can be correctly aligned with and pass through the threaded hole of the nut plate 320; and it should be noted that the positioning pressure piece 32110 pops up toward the box body 20 when there is no external force, so as to clamp and abut the box body 20. At the same time, the positioning pressure piece 32110 is preferably made of metal or engineering plastics and other materials so as to have good elasticity and durability.
[0034] In order to further optimize the above technical solution, the positioning pressing plate 32110 is designed as a U-shaped structure, and the two ends of its open end are fixedly connected to the reference surface 3210. The U-shaped structure can provide a channel around the connecting bolt 310 so that the connecting bolt 310 can pass through smoothly. At the same time, the positioning pressing plate 32110 is arranged to enclose the connecting bolt 310 to ensure that the connecting bolt 310 can be accurately located at the center of the nut plate 320 when passing through the bracket 10 and the box body 20; the positioning pressing plate 32110 can provide guidance for the connecting bolt 310 with its U-shaped closed area, thereby making the assembly process of the connecting bolt 310 more accurate and convenient.
[0035] Specifically, in the nut plate 320 structure provided in the embodiment of the utility model, the overlapping surface 3220 in the nut plate 320 can be designed as a composite structure having a connecting arm 32210 and a docking portion 32230 to enhance the stability and functionality of the connection structure. Specifically, one end of the connecting arm 32210 is connected to the reference plane 3210 to cooperate with the reference plane 3210 to form a U-shaped structure, which can clamp the box body 20. The U-shaped clamping structure provides a larger contact area and a stronger clamping force, thereby enhancing the firmness of the connection structure.
[0036] The docking portion 32230 is arranged on the connecting arm 32210, and is spaced apart from the reference plane 3210. The docking portion 32230 is used to lock the connecting bolt 310. Arranging the connecting area on the docking portion 32230 allows the docking portion 32230 to be operated independently of the overlapping surface 3220, thereby improving the convenience of connection and disassembly; and the U-shaped clamping structure not only provides mechanical stability, but also the opening end size of the U-shaped clamping structure can be designed to be a larger opening size, so that it can serve as a guide structure in the process of clamping the box body 20 so that the edge of the box body 20 can slide smoothly into the bottom of the clamping structure.
[0037] On the basis of the above embodiment, the docking portion 32230 specifically includes a two-end structure, which includes a guide section 32240 with a hollow frustum configuration, and a locking section 32250 with a cylindrical configuration. Specifically, the end of the guide section 32240 with a larger circular surface is arranged toward the reference surface 3210 to help guide the connecting bolt 310 to smoothly enter the locking position, and the end of the guide section 32240 with a smaller circular surface is docked with one end of the locking section 32250, and the diameter of the locking section 32250 is the same as the end of the guide section 32240 with a smaller circular surface. Similarly, the setting of the guide section 32240 can enable the connecting bolt 310 to move from the larger docking diameter area to the locking section 32250 during assembly, so that the connecting bolt 310 has a certain automatic centering performance and reduces the difficulty of docking during the installation process; the locking section 32250 is provided with a thread to cooperate with the connecting bolt 310, and the docking design of the guide section 32240 and the locking section 32250 makes the entire docking part 32230 form a coherent structure, which is convenient for installation and disassembly, while ensuring the accuracy of the connection.
[0038] The above-mentioned embodiment provides an efficient locking mechanism with simple structure, convenient operation and automatic centering through the combination of the guide section 32240 with a hollow cone configuration and the locking section 32250 with a cylindrical configuration. This design structure reduces installation time, improves production efficiency, and enhances the reliability of the connection through the precise threaded fit in the locking section 32250.
[0039] Specifically, with respect to the relative floating setting of the reference plane 3210 and the overlapping surface 3220 in the connection structure provided by the embodiments of the present invention, in some embodiments of the present invention, the connecting arm 32210 on the overlapping surface 3220 is designed as a cantilever structure, which allows the connecting arm 32210 to adapt to different installation conditions through its own elastic deformation without adding additional support; at the same time, the end area where the connecting arm 32210 is connected to the reference plane 3210 is made of an elastic material, such as rubber, engineering plastic or elastic metal, so as to give the connecting arm 32210 a certain elasticity so that it can float to a certain extent, thereby achieving the purpose of relative floating setting of the reference plane 3210 and the docking portion 32230, thereby being able to compensate for the uneven wall thickness on the box body 20 and meet subsequent connection requirements.
[0040] In other embodiments of the utility model, the connecting arm 32210 and the reference plane 3210 are relatively fixed structures, so that the connecting arm 32210 is set as a stable supporting platform, which basically ensures the stability of the entire connecting structure. At the same time, an elastic sheet 32220 is extended from the connecting arm 32210, and the elastic sheet 32220 can be made of a metal spring sheet or a polymer material to provide the necessary elasticity and restoring force; on this basis, the docking part 32230 is fixedly set on the elastic sheet 32220 to utilize the elastic deformation of the elastic sheet 32220 to achieve relative floating between the docking part 32230 and the reference plane 3210, thereby allowing the docking part 32230 to be fine-tuned within a certain range. When connecting, the reference plane 3210 fits one side of the box body 20, and the floating docking part 32230 is elastically adjusted to fit the other side of the box body 20, so as to achieve pre-clamping of the end of the box body 20, and then the connecting bolt 310 passes through and is fixed.
[0041] The setting of the elastic sheet 32220 makes it possible for the docking portion 32230 to float relative to the reference plane 3210 even if the connecting arm 32210 itself is fixed to the reference plane 3210, thereby increasing the flexibility and reliability of the connecting structure. At the same time, during the operation of the vehicle, the design of the elastic sheet 32220 also helps to absorb stress caused by external shock or vibration and protect the connecting structure from damage.
[0042] In addition, it should be noted that due to the elastic effect of the elastic sheet 32220, the docking part 32230 is more convenient during installation and disassembly, and the connecting bolt 310 can be easily aligned and fixed, thereby reducing the installation time, improving work efficiency, and making the connection structure suitable for automated production lines and reducing the assembly cost of the connection structure.
[0043] In order to further optimize the above technical solution and improve the connection stability of the connection structure, a recessed portion is further provided on the side of the box body 20 that contacts the lap joint surface 3220, and the two ends in a single direction abut against the two opposite side walls of the recessed portion to form a closed clamping space, thereby enhancing the stability of the connection; the design of the recessed portion enables the lap joint surface 3220 to be more firmly fixed on the box body 20, thereby reducing the risk of displacement or falling off due to external forces, and due to the positioning effect of the recessed portion, the lap joint surface 3220 can be more accurately positioned at the predetermined position of the box body 20, thereby simplifying the installation process of the connector 30.
[0044] In addition, it should be noted that the presence of the recessed portion provides an additional support point, which increases the mechanical strength of the overall connection structure. Especially when subjected to dynamic loads, the outside of the connection structure is clamped, and it is not easy to produce dynamic displacement and cause connection failure.
[0045] In order to avoid wear between the components in the connection structure due to the rigid connection, a flat washer 330 is provided between the head of the connecting bolt 310 and the plate surface of the bracket 10. It should be noted here that the head of the connecting bolt 310 is the end of the connecting bolt 310 with a larger cross-sectional dimension in the axial direction of the connecting bolt 310; the flat washer 330 can distribute the pressure of the bolt head on the plate surface of the bracket 10, reduce local stress concentration, and protect the bracket 10 from being crushed or deformed.
[0046] It should be noted that the use of the flat washer 330 improves the reliability of the connection, especially when the bracket 10 is made of thin material or has low strength, the flat washer 330 can prevent the connecting bolt 310 from directly damaging the bracket 10; in addition, the flat washer 330 can also serve as a shock-absorbing element to reduce noise generated by vibration and improve the NVH (noise, vibration and harshness) performance of the overall structure.
[0047] Some embodiments of the utility model further disclose a vehicle, which includes a metal bracket and a die-casting vehicle box, and the vehicle uses the connection structure provided by any of the above embodiments to perform fixed connection between the metal bracket and the die-casting vehicle box. Since the above connection structure has the above effects, the above vehicle also has corresponding effects, which will not be described here. At the same time, it should be noted that the above vehicle can be a pure electric drive vehicle, a hybrid vehicle, a fuel vehicle, etc.
[0048] It should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the utility model can be combined with each other.
[0049] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.
[0050] The above description is only a preferred embodiment of the utility model and an explanation of the technical principles used, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. The scope of the utility model involved in the utility model is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but also should cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the concept of the above-mentioned utility model. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the utility model (but not limited to) to form a technical solution.
Claims
1. A connection structure between a metal bracket and a die-casting car box, characterized in that: It includes a bracket, a box body and a connecting piece, wherein the connecting piece is used to fix the bracket and the box body; The connecting member includes a connecting bolt and a nut plate, the connecting bolt passes through the bracket, the box body and the nut plate and is threadedly connected to the nut plate, the nut plate includes a reference surface and a lap surface that are relatively floatingly arranged, the reference surface and the lap surface are clamped on opposite sides of the end of the box body and clamp the box body under elastic action.
2. The connection structure according to claim 1, characterized in that: The top surface of the reference surface contacts the bracket, and the bottom surface contacts the box body. A positioning pressing piece is arranged on the reference surface, and the positioning pressing piece is elastically connected to the reference surface, and the positioning pressing piece pops up toward the box body when no external force is applied.
3. The connection structure according to claim 2, characterized in that: The positioning pressing plate is a U-shaped structure and is arranged to surround the connecting bolt, and two ends of the opening end of the positioning pressing plate are fixedly connected to the reference surface.
4. The connection structure according to claim 1, characterized in that: The overlapping surface includes a connecting arm and a docking portion, one end of the connecting arm is connected to the reference plane and forms a U-shaped clamping structure with the reference plane, the docking portion is arranged on the connecting arm and spaced apart from the reference plane, and the docking portion is used to lock the connecting bolt.
5. The connection structure according to claim 4, characterized in that: The docking portion includes a guiding section with a hollow cone configuration and a locking section with a cylindrical configuration. The end of the guiding section with a larger circular surface is arranged toward the reference plane, and the end with a smaller circular surface has the same diameter as the locking section and docks with it. A thread is arranged inside the locking section to cooperate with the thread of the connecting bolt.
6. The connection structure according to claim 4, characterized in that: The connecting arm is a cantilever structure, and the end portion thereof connected to the reference plane is made of elastic material so that the reference plane and the docking portion are relatively floated.
7. The connection structure according to claim 4, characterized in that: The connecting arm is fixedly arranged relative to the reference surface, an elastic sheet is extended from the connecting arm, and the docking portion is fixedly arranged on the elastic sheet to be floatingly arranged relative to the reference surface.
8. The connection structure according to claim 1, characterized in that: A concave portion is provided on one side of the box body that contacts the overlapping surface, and two ends of the overlapping surface abut against the side walls of the concave portion.
9. The connection structure according to claim 1, characterized in that: A flat washer is arranged between the head of the connecting bolt and the plate surface of the bracket.
10. A vehicle, characterized in that: The invention comprises a connection structure between a metal bracket and a die-casting vehicle box as described in any one of claims 1 to 9.