Automobile water tank lower cross beam assembly structure

Abstract

The utility model discloses a kind of automobile water tank lower crossbeam assembly structure, including water tank lower crossbeam main body and beam backplate main body, water tank lower crossbeam main body has back groove, beam backplate main body covers and is combined in the notch of back groove;Water tank lower crossbeam main body is equipped with the front guard crossbeam mounting portion of connecting front guard crossbeam and the water tank mounting portion of supporting water tank, beam backplate main body top supports and connects water tank bottom;Embedded positioning structure and elastic energy-absorbing structure are equipped on beam backplate main body, beam backplate main body is clamped in back groove by embedded positioning structure and is attached to water tank lower crossbeam main body, and make elastic energy-absorbing structure contact the inner groove bottom of back groove.The utility model is through setting the beam backplate with embedded positioning and elastic energy-absorbing structure, solve the problem that traditional water tank lower crossbeam vibration buffering is poor and collision energy-absorbing is insufficient.

Description

Technical Field

[0001] This utility model belongs to the technical field of water tank lower crossbeam assembly, and particularly relates to a structure of an automotive water tank lower crossbeam assembly. Background Technology

[0002] As a key component of the front compartment structure, the lower crossbeam assembly of the automotive radiator not only supports the radiator tank but also connects to the front bumper crossbeam and installs various auxiliary components. Traditionally, the lower crossbeam body and backplate are designed as a single stamped structure or simple separate welded components. A single-piece structure makes it difficult to integrate effective elastic energy-absorbing elements in the backplate area, resulting in insufficient vibration damping and low-speed collision protection for the radiator. On the other hand, in a simple separate structure, the positioning accuracy and connection rigidity of the backplate and crossbeam body often rely on welding fixtures, leading to low assembly efficiency and weld fatigue under long-term vibration. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a lower crossbeam assembly structure for an automotive water tank. By setting a beam back plate with a fitting positioning and elastic energy absorption structure, it solves the problems of poor vibration buffering and insufficient collision energy absorption of traditional lower crossbeams for water tanks.

[0004] Technical solution: To achieve the above objectives, the present invention provides a lower crossbeam assembly structure for an automotive water tank, comprising a lower crossbeam body and a back plate body, wherein the lower crossbeam body has a back groove, and the back plate body covers the opening of the back groove.

[0005] The main body of the lower crossbeam of the water tank is provided with a front protection crossbeam mounting part that connects to the front protection crossbeam and a water tank mounting part that supports the water tank. The top of the main body of the beam back plate supports and connects to the bottom of the water tank.

[0006] The main body of the beam back plate is provided with a fitting positioning structure and an elastic energy-absorbing structure. The main body of the beam back plate is fitted into the back groove by the fitting positioning structure and fits against the main body of the lower crossbeam of the water tank, and the elastic energy-absorbing structure contacts the bottom of the inner groove of the back groove. The fitting positioning structure is a ring of metal enclosure structure, and the elastic energy-absorbing structure is within the enclosure range of the ring of metal enclosure structure.

[0007] Furthermore, the elastic energy-absorbing structure includes an elastic metal ring with an opening facing and connected to the main body of the beam back plate, and its outer ring surface opposite to the opening side contacts the bottom of the inner groove of the back groove.

[0008] Furthermore, plugs are provided at both ends of the open side of the elastic metal ring, and corresponding insertion holes are provided on the main body of the beam back plate. The plugs are inserted into the corresponding insertion holes and fixed.

[0009] Furthermore, a positioning component is provided between the elastic metal ring and the bottom of the inner groove of the back groove. When the elastic metal ring contacts the bottom of the inner groove of the back groove, it is positioned by the positioning component.

[0010] Furthermore, the positioning component includes a positioning protrusion integrally formed on the outer ring surface of the elastic metal ring, and a positioning groove formed on the bottom of the inner groove of the back groove, wherein the positioning protrusion is embedded in the positioning groove.

[0011] Furthermore, the fitting and positioning structure is integrally formed with the main body of the beam back plate.

[0012] Furthermore, the front bumper crossbeam mounting part includes a front bumper lower crossbeam mounting part for connecting the front bumper lower crossbeam of the vehicle and a front bumper upper crossbeam connecting plate mounting part for connecting the front bumper upper crossbeam connecting plate of the vehicle; the front bumper lower crossbeam mounting part and the water tank mounting part are respectively welded to the front side of the water tank lower crossbeam body, wherein: the front bumper lower crossbeam mounting part extends forward and the water tank mounting part extends upward.

[0013] Furthermore, a reference hole is provided on the main body of the lower crossbeam of the water tank; the main body of the lower crossbeam of the water tank is also provided with a front bumper bracket mounting part, a front collision sensor mounting part, an air intake baffle buckle mounting part, and a deflector mounting part.

[0014] Beneficial Effects: The elastic energy-absorbing structure of this invention is pre-compressed and continuously pressed against the bottom of the inner trough, providing an elastic bearing foundation for the upper water tank. This structure effectively absorbs and isolates high-frequency vibrations from the road surface, preventing them from being directly transmitted to the water tank, thus improving the water tank's operational reliability and lifespan. When a vehicle experiences a low-speed collision, the collision energy forces the main body of the beam back plate and the main body of the lower crossbeam of the water tank to approach each other. At this time, the elastic energy-absorbing structure between the two dissipates the impact energy through its own controllable plastic deformation, thereby providing buffer protection for the upper water tank and reducing its risk of damage. Attached Figure Description

[0015] Figure 1 Schematic diagram of the overall structure of the lower crossbeam assembly of the automotive radiator Figure 1 ;

[0016] Figure 2 Schematic diagram of the overall structure of the lower crossbeam assembly of the automotive radiator Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the main structure of the lower crossbeam assembly of the automotive radiator.

[0018] Figure 4 This is a structural exploded view of the lower crossbeam assembly of the automotive radiator.

[0019] Figure 5This is a schematic diagram of the cross-sectional structure of the lower crossbeam assembly of the automotive water tank. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, a lower crossbeam assembly structure for an automotive radiator includes a lower crossbeam body 1 and a back plate body 2. The lower crossbeam body 1 has a back groove 10, and the back plate body 2 covers the groove opening of the back groove 10. The lower crossbeam body 1 is provided with a front bumper crossbeam mounting part 3 connecting the front bumper crossbeam and a radiator mounting part 4 supporting the radiator. The top of the back plate body 2 supports and connects to the bottom of the radiator. The back plate body 2 is provided with a fitting positioning structure 5 and an elastic energy-absorbing structure 6. The back plate body 2 is fitted into the back groove 10 by the fitting positioning structure 5 and thus fits against the lower crossbeam body 1, and the elastic energy-absorbing structure 6 contacts the inner bottom of the back groove 10. By setting up an independent beam back plate main body 2 and integrating the interlocking positioning structure 5 and the elastic energy absorption structure 6, the rapid and accurate positioning and connection of the water tank lower crossbeam main body 1 and the beam back plate main body 2 are realized. The interlocking positioning structure 5 undertakes the main positioning and rigid connection functions, while the elastic energy absorption structure 6 always maintains contact with the bottom of the inner groove of the back groove 10 after assembly, providing a continuous elastic support for the assembly, effectively absorbing vibrations from the road surface and powertrain, and absorbing energy through its own deformation during low-speed collisions.

[0022] like Figure 4 and Figure 5 As shown, the elastic energy-absorbing structure 6 includes an elastic metal ring 61 with an opening. The opening side of the elastic metal ring 61 faces and is connected to the main body 2 of the beam back plate, and the outer ring surface opposite to the opening side contacts the bottom of the inner groove of the back groove 10. As a preferred embodiment, the use of the open elastic metal ring 61 as an energy-absorbing element utilizes the unique elastic deformation capability and high fatigue strength of the metal material to achieve stable and long-lasting energy absorption and vibration reduction. Its open design ensures that the ring can generate radial elastic deformation to absorb energy when under pressure, and also facilitates its connection to the main body 2 of the beam back plate through the open side.

[0023] It should be noted that elastic metal rings are typically made of high-strength spring steel or other metallic materials with excellent elastic limits and fatigue strength. Their working principle is based on the elastic and plastic deformation characteristics of metallic materials. Under normal operating conditions (such as vehicle vibration), the metal ring operates within its elastic deformation range, utilizing its high stiffness and rapid recovery capability to effectively isolate and attenuate high-frequency vibrations from the road surface, preventing resonance damage to the radiator. When encountering a low-speed collision, if the impact energy exceeds the material's elastic limit, the metal ring enters a controlled plastic deformation stage. Through permanent crushing or deformation, it dissipates a large amount of impact kinetic energy by performing work, thus becoming a highly efficient mechanical energy-absorbing element.

[0024] The interlocking positioning structure 5 serves as the main body for structural positioning and force transmission. Through precise interlocking with the back groove of the lower crossbeam 1 of the water tank, it establishes the final installation position of the beam back plate 2 within the assembly, providing key connection rigidity and structural integrity. This structure ensures a clear and stable force transmission path when the assembly is subjected to various loads.

[0025] The elastic metal ring is precisely housed within the enclosed space formed by the positioning structure, primarily serving the function of vibration and energy absorption. The fitting positioning structure 5 provides the elastic metal ring with defined boundary conditions and a stable working platform, fundamentally ensuring that it remains in its designed pre-compression state after assembly, and that its contact area with the bottom of the inner groove of the back groove 10 remains fixed. This ensures both the uniformity and consistency of the applied elastic support force, and, in the event of a collision, limits the instability mode of the elastic metal ring, allowing it to undergo controllable crushing according to a predetermined deformation mode, thereby efficiently and reliably absorbing impact energy.

[0026] In summary, the interlocking positioning structure 5 provides the necessary geometric constraints and static strength for the system, forming the basis for the accurate installation and reliable operation of the functional component (elastic metal ring); while the elastic metal ring, under the given constraints, realizes its dynamic functions of vibration reduction and energy absorption. The two work closely together in terms of space and function, jointly ensuring the high performance and high reliability of the assembly under dynamic operating conditions.

[0027] like Figure 1 , Figure 4 and Figure 5 As shown, plugs 62 are respectively provided at both ends of the open side of the elastic metal ring 61, and corresponding insertion holes 20 are provided on the beam back plate body 2. The plugs 62 are inserted into the corresponding insertion holes 20 and fixed. By plugging and fixing the plugs 62 to the insertion holes 20, the elastic metal ring is reliably installed on the beam back plate body 2. This connection method avoids the use of additional connectors, simplifies the assembly process, and prevents the elastic metal ring from loosening from the beam back plate body 2 under vibration, thus ensuring the stability of the elastic energy absorption function.

[0028] A positioning component 60 is provided between the elastic metal ring 61 and the inner bottom of the back groove 10. When the elastic metal ring 61 contacts the inner bottom of the back groove 10, it is positioned by the positioning component 60. The positioning component 60 defines the final installation position of the elastic metal ring on the inner bottom of the back groove 10, thereby preventing the elastic metal ring from sliding laterally due to vibration or force during the use of the assembly. This ensures that it is always in the designed pre-compression state and optimal working position, thus guaranteeing the reliability and consistency of the energy absorption effect.

[0029] More specifically, the positioning component 60 includes a positioning protrusion 63 integrally formed on the outer surface of the elastic metal ring 61, and a positioning groove 64 formed in the bottom of the inner groove of the back groove 10. The positioning protrusion 63 is engaged with the positioning groove 64. The engagement of the positioning protrusion 63 and the positioning groove 64 constitutes a simple and precise anti-displacement mechanical structure. After the integrally formed positioning protrusion 63 is engaged with the positioning groove 64, it can effectively resist translational movement in all directions, realizing circumferential and radial positioning of the elastic metal ring with high reliability.

[0030] The fitting and positioning structure 5 is integrally formed with the main body 2 of the beam back plate, enhancing the overall structural strength and rigidity of this area. The fitting and positioning structure 5 is a ring of metal enclosure, and the elastic energy-absorbing structure 6 is located within the enclosure of this ring of metal enclosure. The metal enclosure structure plays a guiding and centering role during assembly, improving assembly accuracy; at the same time, it surrounds the elastic energy-absorbing structure 6, protecting it and limiting its range of motion, ensuring that energy is absorbed and transferred in an orderly manner when subjected to force.

[0031] The front bumper crossbeam mounting part 3 includes a front bumper lower crossbeam mounting part 31 for connecting the lower crossbeam of the front bumper of the vehicle and a front bumper upper crossbeam connecting plate mounting part 32 for connecting the upper crossbeam connecting plate of the front bumper of the vehicle. The upper crossbeam connecting plate mounting part 32 is a mounting hole for the upper crossbeam connecting plate of the front bumper. The front bumper lower crossbeam mounting part 31 and the water tank mounting part 4 are respectively welded to the front side of the lower crossbeam body 1 of the water tank. The front bumper lower crossbeam mounting part 31 extends forward and the water tank mounting part 4 extends upward. This layout allows the impact force from the front bumper to be transmitted more directly to the lower crossbeam body 1 of the water tank, while the supporting force on the water tank is borne by the upwardly extending water tank mounting part 4. The structural force transmission path is clear, which is conducive to improving the load-bearing efficiency and stability of the assembly.

[0032] like Figure 2 and Figure 3As shown, the lower crossbeam body 1 of the water tank has a reference hole 7; the lower crossbeam body 1 of the water tank also has a front bumper bracket mounting part 8, a front collision sensor mounting part 9, an air intake baffle clip mounting part 11, and a deflector mounting part 12, realizing the centralized installation and positioning of multiple components (front bumper bracket, front collision sensor, air intake baffle, and deflector) in the front compartment of the vehicle. Specifically: the front bumper bracket mounting part 8 includes a front bumper bracket surface 81 and a front bumper bracket mounting hole 82 on the front bumper bracket surface 81. The front collision sensor mounting part 9 includes a front collision sensor mounting hole 91 and a front collision sensor limiting hole 92. The air intake baffle clip mounting part 11 is an air intake baffle clip mounting hole. The deflector mounting part 12 is a deflector mounting hole.

[0033] The main body 2 of the beam back plate covers the middle groove of the back groove 10 of the main body 1 of the lower crossbeam of the water tank and is welded and fixed to the main body 1 of the lower crossbeam of the water tank. Under the premise of ensuring sufficient connection strength and support area, the material is optimized and utilized. Furthermore, weight reduction holes 21 are provided on it. The opening of weight reduction holes directly reduces the weight of the main body 2 of the beam back plate, thus achieving lightweighting.

[0034] The elastic energy-absorbing structure of this invention is pre-compressed and continuously pressed against the bottom of the inner groove, providing an elastic bearing foundation for the upper water tank. This structure effectively absorbs and isolates high-frequency vibrations from the road surface, preventing them from being directly transmitted to the water tank, thus improving the water tank's operational reliability and lifespan. When a vehicle experiences a low-speed collision, the collision energy forces the main body of the beam back plate and the main body of the lower crossbeam of the water tank closer together. At this time, the elastic energy-absorbing structure between the two (such as the elastic metal ring preferred in this invention) dissipates the impact energy through its own controllable plastic deformation, thereby providing buffer protection for the upper water tank and reducing its risk of damage. The fitting and positioning structure ensures that the elastic energy-absorbing structure is always in the precise design position after assembly, preventing it from shifting during vibration or stress, and ensuring the reliability and consistency of the energy absorption effect.

[0035] A method for machining and assembling a lower crossbeam assembly structure for an automotive radiator includes the following steps:

[0036] S1. The lower crossbeam body 1 and the back plate body 2 of the water tank are stamped and formed respectively. The back groove 10, the positioning groove 64 and various functional installation parts are machined on the lower crossbeam body 1. The fitting positioning structure 5, the insertion hole 20 and the weight reduction hole 21 are machined on the back plate body 2.

[0037] S2. Elastic energy-absorbing structure assembly: Align the plugs 62 at both ends of the open side of the elastic metal ring 61 with the insertion holes 20 on the beam back plate body 2, apply pressure until the plugs 62 are fully inserted and locked, so that the elastic metal ring 61 is reliably connected to the beam back plate body 2.

[0038] S3. Pre-positioning and embedding: Move the assembled beam back plate body 2 and the elastic metal ring 61 toward the back groove 10 of the water tank lower crossbeam body 1, so that the side of the fitting and positioning structure 5 on the beam back plate body 2 is aligned with the side wall of the back groove 10, and then press it in vertically until the fitting and positioning structure 5 is completely embedded in the back groove 10. At this time, the beam back plate body 2 and the water tank lower crossbeam body 1 achieve preliminary fitting and precise positioning.

[0039] S4. Final positioning of the energy-absorbing structure: During the pressing process in step S3, the outer surface of the elastic metal ring 61 contacts the bottom of the inner groove of the back groove 10 and begins to be compressed; continue pressing until the positioning protrusion 63 on the outer surface of the elastic metal ring 61 is aligned with the positioning groove 64 at the bottom of the inner groove of the back groove 10 and is engaged in place; this process is accompanied by a clear sense of engagement, indicating that the positioning protrusion 63 has completely entered the positioning groove 64 and the elastic metal ring 61 has reached the predetermined compression stroke;

[0040] S5. Final Fixing: In the interlocking area between the fitting positioning structure 5 and the back groove 10, and at the joint edge between the beam back plate body 2 and the water tank lower cross beam body 1, continuous spot welding or laser welding is used to weld them together so that they are permanently fixedly connected into a rigid assembly component.

[0041] S6. Weld the front bumper lower crossbeam mounting part 31 and the water tank mounting part 4 to the designated positions on the front side of the water tank lower crossbeam body 1 respectively, and complete the main body manufacturing of the assembly structure.

[0042] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A structure for a lower crossbeam assembly of an automotive water tank, characterized in that: It includes a water tank lower crossbeam body (1) and a beam back plate body (2), wherein the water tank lower crossbeam body (1) has a back groove (10), and the beam back plate body (2) covers the groove of the back groove (10); The water tank lower crossbeam body (1) is provided with a front protection crossbeam mounting part (3) connecting the front protection crossbeam and a water tank mounting part (4) supporting the water tank. The top of the beam back plate body (2) supports and connects to the bottom of the water tank. The beam back plate body (2) is provided with a fitting positioning structure (5) and an elastic energy-absorbing structure (6). The beam back plate body (2) is fitted into the back groove (10) by the fitting positioning structure (5) and fits against the water tank lower crossbeam body (1), and the elastic energy-absorbing structure (6) contacts the bottom of the inner groove of the back groove (10). The fitting positioning structure (5) is a ring of metal enclosure structure, and the elastic energy-absorbing structure (6) is within the enclosure range of the ring of metal enclosure structure.

2. The automotive water tank lower crossbeam assembly structure according to claim 1, characterized in that: The elastic energy-absorbing structure (6) includes an elastic metal ring (61) with an opening facing and connected to the beam back plate body (2), and its outer ring surface opposite to the opening side is in contact with the bottom of the inner groove of the back groove (10).

3. The automotive water tank lower crossbeam assembly structure according to claim 2, characterized in that: The elastic metal ring (61) has plugs (62) at both ends of its open side, and the main body (2) of the beam back plate has corresponding sockets (20). The plugs (62) are inserted into the corresponding sockets (20) and fixed.

4. The automotive water tank lower crossbeam assembly structure according to claim 2 or 3, characterized in that: A positioning component (60) is provided between the elastic metal ring (61) and the bottom of the inner groove of the back groove (10). When the elastic metal ring (61) contacts the bottom of the inner groove of the back groove (10), it is positioned by the positioning component (60).

5. The automotive water tank lower crossbeam assembly structure according to claim 4, characterized in that: The positioning component (60) includes a positioning protrusion (63) integrally formed on the outer ring surface of the elastic metal ring (61), and a positioning groove (64) opened in the bottom of the inner groove of the back groove (10), wherein the positioning protrusion (63) is embedded in the positioning groove (64).

6. The automotive water tank lower crossbeam assembly structure according to claim 1, characterized in that: The fitting and positioning structure (5) and the main body of the beam back plate (2) are integrally formed.

7. The automotive water tank lower crossbeam assembly structure according to claim 1, characterized in that: The front bumper crossbeam mounting part (3) includes a front bumper lower crossbeam mounting part (31) for connecting the front bumper lower crossbeam of the car and a front bumper upper crossbeam connecting plate mounting part (32) for connecting the front bumper upper crossbeam connecting plate of the car; the front bumper lower crossbeam mounting part (31) and the water tank mounting part (4) are respectively welded to the front side of the water tank lower crossbeam body (1), wherein: the front bumper lower crossbeam mounting part (31) extends forward and the water tank mounting part (4) extends upward.

8. The automotive water tank lower crossbeam assembly structure according to claim 1, characterized in that: The water tank lower crossbeam body (1) is provided with a reference hole (7); the water tank lower crossbeam body (1) is also provided with a front bumper bracket mounting part (8), a front collision sensor mounting part (9), an air intake baffle buckle mounting part (11) and a guide plate mounting part (12).

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