An automobile expansion tank mounting structure

Abstract

The utility model relates to an automobile expansion water tank mounting structure, including expansion water tank and water tank support, water tank support is fixed on the installation crossbeam of automobile front cabin, the bottom center of expansion water tank is provided with the locating post, both sides are provided with the mounting panel, and the expansion water tank with water tank support forms three point fixed structure and realizes stable installation through the double -cavity design, the locating post is combined with the mounting hole interference fit and is suspended under the damping rubber pad, effectively absorbs the vehicle driving vibration, reduces the shaking of expansion water tank, the split type damping rubber pad sets up layer by layer, and the upper and lower layers buffer vertical and horizontal load respectively, and the anti -drop structure is connected with the metal lining and improves the reliability, avoids the risk of cracking, the locating post and mounting panel injection integrated mould strengthen structural strength, and the whole is through the bolt rigid connection and the elastic damping synergistic effect, improves the whole car operation stability.

Description

Technical Field

[0001] This utility model relates to the field of automotive expansion tank installation technology, and in particular to an automotive expansion tank installation structure. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] Traditional automotive expansion tanks use independent chambers, typically forming a separate cooling circulation system corresponding to the engine's cooling circuit. With the development of the hybrid vehicle industry, in addition to cooling the engine system, it's also necessary to cool components such as the drive motor, battery pack, and controller. In the design of cooling circulation systems, most systems have one expansion tank corresponding to one cooling system circuit. However, because the coolant operating temperatures of several cooling system circuits differ, they cannot be combined, so some vehicles require two or more expansion tanks. The arrangement of multiple expansion tanks occupies a significant amount of space in the front engine compartment, and installation and coolant filling are time-consuming. Therefore, existing technology has proposed multi-chamber expansion tanks to reduce the complexity of the installation process. However, due to their large volume, multi-chamber expansion tanks are significantly heavier than traditional expansion tanks. Traditional slotted or asymmetrical fixing structures are prone to causing the expansion tank to vibrate during vehicle operation, potentially leading to cracking of the tank and affecting the overall stability of the vehicle. Utility Model Content The purpose of this invention is to provide an automotive expansion tank mounting structure that can at least solve one of the aforementioned technical problems.

[0004] To achieve the above objectives, one or more embodiments of this utility model provide an automotive expansion tank mounting structure, including a tank bracket and a dual-chamber expansion tank. The tank bracket is fixed to a mounting beam in the front engine compartment of the vehicle. A positioning post is provided at the center of the bottom of the expansion tank, and mounting plates are provided on both sides. The positioning post and mounting plates form a three-point fixation with the tank bracket. Vibration damping pads are provided at the connection points between the positioning post, the mounting plates, and the tank bracket. The mounting plates use split-type vibration damping pads, and the positioning post uses a lower-suspension vibration damping pad.

[0005] Furthermore, the water tank bracket is arranged in a Z-shaped vertical bend, and the bottom of the water tank bracket is provided with mounting holes. The positioning column together with the lower suspended vibration damping pad is interference-fitted with the mounting holes.

[0006] Furthermore, the split-type vibration damping pads are arranged in layers on the upper and lower sides of the mounting plate.

[0007] Furthermore, the mounting plate has a through hole at its center, and a welding nut is installed in the through hole, which is then connected to the water tank bracket by bolts.

[0008] Furthermore, the lower suspension damping pad is provided with an anti-detachment structure.

[0009] Furthermore, the split-type vibration damping pad has a metal bushing at its center.

[0010] Furthermore, the expansion tank is fixedly connected to the welded nuts on both sides of the tank bracket by bolts passing through the split-type vibration damping pads.

[0011] Furthermore, the positioning column and the expansion tank are integrally injection molded structures.

[0012] Furthermore, the mounting plate and the expansion tank are integrally injection molded structures.

[0013] Furthermore, the water tank bracket is fixedly connected to the mounting beam by bolts.

[0014] The beneficial effects of the embodiments of this utility model are as follows: This utility model achieves stable installation by forming a three-point fixing structure with the expansion tank and tank bracket through a dual-cavity design; the positioning column and mounting hole are interference-fitted together to suspend the vibration damping pad, which effectively absorbs vehicle vibration and reduces the shaking of the expansion tank; the split vibration damping pad is set in layers, with the upper and lower layers buffering vertical and lateral loads respectively, and the anti-detachment structure and metal bushing improve the connection reliability and avoid the risk of cracking.

[0015] The positioning post and mounting plate are injection molded as a single unit to enhance structural strength. The overall system is rigidly connected by bolts and works synergistically with elastic vibration damping to improve the stability of the vehicle's operation. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0017] Figure 1 This is a schematic diagram showing the positions of the expansion tank and tank support in an embodiment of this utility model; Figure 2 This is a rear-view perspective view of the expansion tank according to an embodiment of the present invention; Figure 3 This is a schematic diagram showing the connection between the expansion tank and the mounting beam of the automobile according to an embodiment of the present invention.

[0018] In the diagram: 1. Expansion tank; 2. Tank support; 3. Split-type vibration damping pad; 4. Lower suspended vibration damping pad; 5. Positioning column; 6. Mounting plate; 7. Mounting beam. Detailed Implementation

[0019] like Figures 1 to 3As shown in the embodiment of this utility model, an automotive expansion tank installation structure is described, including a tank bracket 2 and a dual-chamber expansion tank 1. The tank bracket 2 is fixed on the mounting beam 7 in the front engine compartment of the vehicle.

[0020] like Figure 1 and Figure 2 As shown, a positioning post 5 is set at the center of the bottom of the expansion tank 1, and mounting plates 6 are set on both sides. The positioning post 5 and the mounting plates 6 form a three-point fixation with the tank bracket 2. Vibration damping pads are set at the connection points between the positioning post 5, the mounting plates 6 and the tank bracket 2. The mounting plates 6 use split vibration damping pads 3, and the positioning post 5 uses a lower suspended vibration damping pad 4.

[0021] The expansion tank 1 is axially positioned by embedding the bottom positioning post 5 into the center hole of the bracket. The mounting plates 6 on both sides are fastened to the side walls of the bracket with bolts to form a triangular support. The split-type vibration damping pads 3 form an elastic sandwich on the upper and lower surfaces of the mounting plate 6. When the vehicle turns and generates lateral acceleration, the upper pad is compressed and absorbs energy; when braking or acceleration generates longitudinal inertial force, the lower pad dissipates vibration through shear deformation. The lower suspension vibration damping pads 4 bear the weight of the tank body vertically. When encountering road bumps, the rubber blocks compress and deform to reduce the impact transmission. The rigid connection between the tank bracket 2 and the front engine compartment crossbeam provides a stable foundation for the entire system. The three-point fixing structure evenly distributes the load of the tank body to three vibration damping nodes, avoiding local stress concentration.

[0022] The water tank bracket 2 is designed with a Z-shaped vertical bend. A mounting hole is located at the bottom of the bracket. The positioning post 5, along with the lower suspension damping pad 4, is interference-fitted with the mounting hole. When the positioning post 5, as the main load-bearing structure, is inserted into the mounting hole of the water tank bracket 2, the lower suspension damping pad 4 undergoes radial expansion during axial compression, creating continuous contact pressure between the outer surface of the pad and the inner wall of the mounting hole. This pressure distribution ensures that the connection interface remains in an elastic contact state, maintaining vertical load support while absorbing multi-directional vibration energy generated during vehicle operation through the viscoelastic properties of the rubber material. Under lateral loads, the friction generated by the interference fit effectively resists the horizontal displacement tendency of the expanding water tank 1, while the elastic deformation of the pad allows the connection structure to undergo slight displacement within a limited range to release stress.

[0023] The split-type damping pads 3 are layered on the upper and lower sides of the mounting plate 6, which is sandwiched between the two layers to form a composite damping structure. When the vehicle vibrates vertically, the upper pad absorbs the inertial impact load from the expansion tank 1 through elastic deformation; when the engine compartment transmits lateral vibrations, the lower pad dissipates the vibration energy through shear deformation. The hardness gradient design of the upper and lower pads ensures that the vertical load is preferentially borne by the softer upper pad, while the lateral vibration energy is dispersed and transmitted through the harder lower pad. This load distribution mechanism avoids stress concentration caused by a single pad bearing multiple loads simultaneously. The contact area between the mounting plate 6 and the pads is much larger than that of a traditional single-layer structure due to the layered structure, and the vibration waves cancel each other out at the interface, effectively suppressing resonance.

[0024] The mounting plate 6 has a through hole at its center, into which a welded nut is installed. After the through hole is opened at the center of the mounting plate 6 along its thickness direction, the welded nut is embedded inside and a permanent connection is formed through welding. When the bolt passes through the metal bushing of the split-type damping pad 3, its threaded end forms a rigid locking structure with the welded nut. This structure provides axial constraint at the connection point between the mounting plate 6 and the water tank bracket 2, effectively resisting longitudinal vibration loads generated during vehicle operation. Simultaneously, the elastic clamping layer formed by the split-type damping pad 3 on the upper and lower surfaces of the mounting plate 6 absorbs lateral vibration energy. This rigid-flexible coupling fixing method ensures the vertical positioning accuracy of the mounting plate 6 while reducing horizontal vibration transmission through elastic elements.

[0025] The lower suspension damping pad 4 is equipped with an anti-detachment structure. The annular protrusion of the anti-detachment structure is embedded in the corresponding groove on the inner wall of the mounting hole with an interference fit, forming a bidirectional limiting constraint during vehicle vibration. When the expansion tank 1 is subjected to a vertical impact load, the protruding part of the anti-detachment structure generates contact pressure with the bracket hole wall, preventing the damping pad from detaching axially. When subjected to a lateral shear force, the snap-fit ​​structure limits radial displacement through the interlocking effect of its geometric shape. This structure ensures that the connection interface between the positioning post 5 and the bracket always maintains a predetermined clamping force, avoiding an increase in the fit clearance due to long-term vibration.

[0026] The split-type vibration damping pad 3 has a metal bushing at its center. The upper and lower rubber layers of the split-type vibration damping pad 3 absorb vibration impacts from different directions during vehicle operation. The metal bushing acts as a rigid skeleton, running through the central axis of the pad and forming an axial support channel. When the weight of the expansion tank 1 is transferred to the pad through the mounting plate 6, the metal bushing bears the vertical pressure load, preventing the rubber layer from being over-compressed. When the vehicle bumps and generates lateral shear force, the vulcanized interface between the metal bushing and the rubber layer forms a shear barrier, preventing interlayer displacement of the pad.

[0027] The expansion tank 1 is fixedly connected to the water tank bracket 2 via bolts passing through the split-type vibration damping pads 3 and welded nuts on both sides. The bolts, after passing through the layered structure of the split-type vibration damping pads 3, are tightened with the welded nuts, forming an elastic constraint connection. The layered design of the split-type vibration damping pads 3 creates a multi-level buffer interface in the bolt connection area, absorbing the vibration energy generated during vehicle operation through the progressive deformation of the pads. The welded nuts on both sides of the water tank bracket 2 provide symmetrically distributed rigid anchor points for the bolts, ensuring that the load of the expansion tank 1 is evenly transferred to the bracket, preventing bracket twisting due to misalignment of the fixing points. The combination of the split-type vibration damping pads 3 and the welded nuts forms a rigid-flexible fixing system that limits the displacement of the expansion tank 1 while allowing it to undergo controllable elastic deformation during vibration, thus balancing static load-bearing and dynamic vibration damping requirements.

[0028] like Figure 2 As shown, the positioning post 5 and the expansion tank 1 are integrally injection molded structures. During the injection molding process, the positioning post 5 and the shell of the expansion tank 1 fuse together in a molten state, forming a continuous molecular chain structure. After the material cools, the connection interface between the positioning post 5 and the expansion tank 1 does not have the mechanical bonding surface formed by traditional welding or bolting, thus avoiding the propagation of microcracks caused by vibration loads. During vehicle operation, the vibration energy transmitted by the three-point fixed structure is evenly distributed to the body of the expansion tank 1 through the continuous material structure of the positioning post 5, rather than being concentrated at local connection points.

[0029] The mounting plate 6 and the expansion tank 1 are integrally injection molded structures. During the injection molding process, molten plastic material is injected into the mold cavity containing the mounting plate 6 structure. As the material cools and solidifies, it forms a molecular-level interface with the shell of the expansion tank 1. This integrated structure creates a gradual transition without stress abrupt changes in the connection area between the mounting plate 6 and the expansion tank 1, avoiding localized stress concentrations caused by vibration in traditional split-type connections. The bonding strength between the mounting plate 6 and the expansion tank 1 is provided by the molecular bonds of the materials themselves, and its shear resistance is significantly higher than that of mechanical connections using split structures.

[0030] like Figure 3 As shown, the water tank bracket 2 is fixedly connected to the vehicle's front engine compartment mounting beam 7 by bolts. After the water tank bracket 2 and the mounting beam 7 form a rigid connection, the weight load of the expansion tank 1 is evenly transferred to the vehicle body frame through the bracket. The axial preload generated by the bolt connection can eliminate the assembly gap between the bracket and the beam contact surface, preventing relative displacement caused by vehicle vibration. The use of standard threaded fastening allows for precise adjustment of the connection strength through torque control during installation, and also facilitates quick replacement of the bracket by removing the bolts during maintenance. As a component of the main body structure, the rigid support characteristics of the mounting beam 7 can effectively suppress the inertial sway of the expansion tank 1 under vehicle acceleration, braking, or bumpy conditions.

[0031] Working principle of this utility model The water tank bracket 2 is bolted to the mounting beam 7 in the front engine compartment of the vehicle. The bottom center positioning post 5 of the expansion tank 1 and the two side mounting plates 6 form a three-point fixing structure. The positioning post 5 achieves center positioning through an interference fit between the lower suspension damping pad 4 and the mounting hole of the bracket. The two side mounting plates 6 are bolted to the water tank bracket 2 through split damping pads 3. The three-point layout ensures uniform force distribution. The damping pads absorb vehicle vibrations. The design of the split damping pads 3 adapts to the force characteristics of the mounting plate 6. The lower suspension structure enhances longitudinal stability. The anti-detachment design and metal bushings improve connection reliability and effectively reduce the risk of water tank vibration and cracking.

[0032] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. An automobile expansion tank mounting structure characterized by comprising: The device includes a water tank bracket and a dual-chamber expansion tank. The water tank bracket is fixed to the mounting beam in the front engine compartment of the vehicle. A positioning post is set at the center of the bottom of the expansion tank, and mounting plates are set on both sides. The positioning post and mounting plates form a three-point fixation with the water tank bracket. Vibration damping pads are set at the connection points between the positioning post, the mounting plate and the water tank bracket. The mounting plate uses a split vibration damping pad, and the positioning post uses a lower-suspension vibration damping pad.

2. The mounting structure for an expansion tank of an automobile according to claim 1, wherein The water tank bracket is arranged in a Z-shaped vertical bend, and the bottom of the water tank bracket is provided with mounting holes. The positioning column together with the lower suspended vibration damping pad is interference-fitted with the mounting holes.

3. The mounting structure for an expansion tank of an automobile according to claim 1, wherein The split-type vibration damping pads are arranged in layers on the upper and lower sides of the mounting plate.

4. The mounting structure for an expansion tank of an automobile according to claim 1, wherein The mounting plate has a through hole in the center, and a welding nut is installed in the through hole to connect it to the water tank bracket by bolts.

5. The mounting structure for an expansion tank of an automobile according to claim 1, wherein The lower suspension damping pad is equipped with an anti-detachment structure.

6. The mounting structure for an expansion tank of an automobile according to claim 1, wherein The split-type vibration damping pad has a metal bushing at its center.

7. The mounting structure for an expansion tank of an automobile according to claim 1, wherein The expansion tank is fixedly connected to the tank support on both sides by bolts passing through the split vibration damping pads and welding nuts.

8. The automotive expansion tank mounting structure as described in claim 1, characterized in that, The positioning column and the expansion tank are integrally injection molded structures.

9. The mounting structure for an expansion tank of an automobile according to claim 1, wherein The mounting plate and the expansion tank are integrally injection molded structures.

10. The mounting structure for an expansion tank of an automobile according to claim 1, wherein The water tank bracket is fixedly connected to the mounting beam by bolts.

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