A lower damping pad of a plastic support of an automobile cooling module

Abstract

The utility model belongs to the technical field of automobile parts, specifically discloses a kind of automobile cooling module plastic support lower shock pad, including by inside to outside setting in order plastic inner framework, rubber framework and plastic outer framework, and the plastic inner framework is hollow structure;The rubber framework top is equipped with the central hole one compatible with plastic inner framework, and the central hole one inner wall upper end is equipped with annular groove, and the plastic inner framework outside upper end is equipped with the boss compatible with annular groove.The utility model provides a kind of automobile cooling module plastic support lower shock pad, and plastic outer framework top corner place is all equipped with openwork structure, this openwork structure, directly removes the redundant material of non-key area, realizes the remarkable weight reduction effect, not only reduce material cost, more reduce the weight of entire shock pad, it is convenient to install, transport, and unnecessary load to support structure is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive component technology, and in particular to a shock-absorbing pad under a plastic bracket for an automotive cooling module. Background Technology

[0002] The automotive cooling module (which typically includes components such as a radiator, condenser, and fan) is a core component ensuring the stable operation of the powertrain. It is usually mounted in the front compartment of the vehicle via a plastic bracket assembly. Because the cooling module is continuously subjected to combined vibrations from the engine, road surface excitation, and the high-speed rotation of the fan during operation, the damping pad, as a critical connecting component between the bracket and the vehicle body, must simultaneously meet three core requirements: load-bearing strength, vibration attenuation, and fatigue durability.

[0003] Currently, the commonly used cooling module vibration damping pads in the industry consist of the following three parts: 1. Inner frame: used to connect the cooling module bracket; 2. Outer frame: used to connect the vehicle body mounting point; 3. Rubber layer: filled between the inner and outer frames through a vulcanization process to form a solid rubber body for vibration isolation. Although this damping pad can provide basic vibration isolation in the short term, it has significant defects in long-term use: First, insufficient fatigue resistance: the rubber layer is prone to hardening, cracking, and even detachment from the frame under continuous high-frequency vibration loads, especially under alternating high and low temperature conditions, the rubber thermal aging is accelerated, causing a sharp drop in vibration isolation efficiency; Second, manufacturing process defects: the outer frame is a dense structure, and when injection molding is used, the material properties cause shrinkage marks, pores, and internal stress concentration during the cooling process, resulting in an increased product defect rate in the production of the outer frame.

[0004] In summary, the existing cooling module damping pads have problems such as insufficient fatigue resistance and increased defect rate during the manufacturing of the dense structure outer skeleton. Utility Model Content

[0005] This invention provides a shock-absorbing pad under a plastic bracket for an automotive cooling module, which can solve the problems of insufficient fatigue resistance and increased defect rate during the manufacturing of the dense outer skeleton in the prior art.

[0006] A shock-absorbing pad under a plastic bracket for an automotive cooling module includes an inner plastic skeleton, a rubber skeleton, and an outer plastic skeleton arranged sequentially from the inside to the outside, wherein the inner plastic skeleton is a hollow structure. The top of the rubber skeleton has a central hole that matches the plastic inner skeleton. The upper end of the inner wall of the central hole has an annular groove. The upper end of the outer side of the plastic inner skeleton has a boss that matches the annular groove. The top of the plastic outer frame has a central hole that matches the rubber frame. The plastic outer frame has a hollow structure at the top corner.

[0007] Furthermore, a first chamfer is provided on the inner side of the top surface of the plastic inner skeleton.

[0008] Furthermore, the first chamfered portion includes an inclined surface, and the angle between the plane containing the inclined surface and the plane containing the top surface of the plastic inner skeleton is 5-60°.

[0009] Furthermore, two limiting grooves are provided on the top edge of the rubber skeleton.

[0010] Furthermore, the inner wall of the limiting groove is provided with limiting ribs.

[0011] Furthermore, mounting grooves are provided at the left and right ends of the bottom surface of the plastic outer frame, and barbed structures are provided in the mounting grooves.

[0012] Furthermore, the hollow structure includes several first hollow grooves.

[0013] Furthermore, in each of the hollow structures, there are two first hollow grooves, and the two first hollow grooves are arranged opposite to each other.

[0014] Furthermore, a second hollowed-out groove is provided at the bottom of the plastic outer frame corresponding to the position of the hollowed-out structure.

[0015] Furthermore, a second chamfer is provided on the outer side of the top surface of the plastic outer frame.

[0016] Compared with the prior art, the beneficial effects of this utility model are: This utility model provides a shock-absorbing pad under a plastic bracket for an automotive cooling module. The plastic outer frame has hollowed-out structures at the top corners. These hollowed-out structures directly remove redundant material in non-critical areas, achieving a significant weight reduction effect. This not only reduces material costs but also lightens the overall weight of the shock-absorbing pad, facilitating installation and transportation. It also reduces unnecessary load on the supporting structure, thus solving the problems of insufficient fatigue resistance and increased defect rates during the manufacturing of dense outer frames in existing cooling module shock-absorbing pads. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 A schematic diagram of the structure of the lower shock-absorbing pad of the plastic bracket for an automotive cooling module provided by this utility model; Figure 2 A schematic diagram of the plastic outer frame and rubber frame of the lower shock-absorbing pad of the plastic bracket of an automotive cooling module provided by this utility model; Figure 3 A schematic diagram of the plastic inner skeleton of the lower shock-absorbing pad of the plastic bracket of an automotive cooling module provided by this utility model; Figure 4 A schematic diagram of the structure of the rubber skeleton of the lower shock-absorbing pad of the plastic bracket of an automotive cooling module provided by this utility model; Figure 5 The bottom view of the plastic outer frame of the plastic bracket for the shock-absorbing pad of the automotive cooling module provided by this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Plastic inner skeleton; 2. Plastic outer skeleton; 3. Rubber skeleton; 4. Hollowed-out structure; 5. Center hole one; 11. Boss; 12. First chamfer; 121. Inclined surface; 21. Center hole two; 22. Mounting groove; 23. Hook structure; 24. Second hollowed-out groove; 25. Second chamfer; 31. Limiting through groove; 32. Limiting rib; 41. First hollowed-out groove; 51. Annular groove. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0020] like Figures 1 to 5 As shown, the present invention provides a shock-absorbing pad under a plastic bracket for an automotive cooling module, comprising a plastic inner skeleton 1, a rubber skeleton 3, and a plastic outer skeleton 2 arranged sequentially from the inside to the outside. The plastic inner skeleton 1 is a hollow structure. The plastic inner skeleton 1, the rubber skeleton 3, and the plastic outer skeleton 2 are assembled into the shock-absorbing pad structure through a rubber injection vulcanization process. The shock-absorbing pad utilizes the elastic properties of the rubber layer between the inner and outer skeletons to effectively isolate the vibration generated by the radiator cooling module (including fans, water pumps, etc.) during operation, and significantly attenuates the transmission of vibration energy to the vehicle body sheet metal structure. The top of the rubber skeleton 3 is provided with a central hole 5 that is compatible with the plastic inner skeleton 1. The upper end of the inner wall of the central hole 5 is provided with an annular groove 51. The upper end of the outer side of the plastic inner skeleton 1 is integrally formed with a boss 11 that is compatible with the annular groove 51. The annular groove 51 on the rubber skeleton 3 forms a displacement limit with the protrusion 11 on the outside of the plastic inner skeleton 1. When the vibration displacement exceeds the threshold, the protrusion 11 contacts the side wall of the annular groove 51 to prevent the rubber skeleton 3 from being overstretched. The top of the plastic outer frame 2 is provided with a central hole 21 that is adapted to the rubber frame 3; the central hole 21 is adapted to the rubber frame 3. The plastic outer frame 2 has a hollow structure 4 at the top corner; the hollow structure 4 directly removes redundant materials in non-critical areas, achieving a significant weight reduction effect, which not only reduces material costs, but also reduces the weight of the entire shock-absorbing pad, making it easier to install and transport, and reducing unnecessary load on the supporting structure. Furthermore, since the hollow structure 4 is located at the top corner of the plastic outer frame 2, the wall thickness and material accumulation of the plastic outer frame 2 at the corner are reduced, effectively reducing material consumption during the injection molding process. Moreover, the hollow design helps to dissipate heat evenly, shortens the cooling time, and improves production efficiency. More specifically, the hollow structure 4 reduces the risk of internal stress and warping deformation caused by uneven cooling shrinkage, and improves the dimensional accuracy and yield of the plastic outer frame 2.

[0021] like Figures 1 to 5 As shown, in some embodiments of this utility model, a first chamfer 12 is provided on the inner side of the top surface of the plastic inner frame 1; providing precise guidance for pressing in the accessory pins during installation. Specifically, the chamfer design effectively avoids damage to the plastic edge of the plastic inner skeleton 1 or jamming caused by misalignment during the pressing process, thus protecting the integrity of the skeleton structure. The guiding effect of the first chamfer 12 allows the pin to be pressed into place more smoothly and accurately, simplifying assembly operations, improving production line efficiency, and ensuring consistent connection. The smooth pressing process helps the pin and the plastic inner skeleton 1 form a tighter connection with more uniform stress distribution, improving the long-term reliability of the connection point.

[0022] like Figures 1 to 5 As shown, in some embodiments of this utility model, the first chamfered portion 12 includes an inclined surface 121, and the angle between the plane containing the inclined surface 121 and the plane containing the top surface of the plastic inner skeleton 1 is 5-60°. Within this included angle range, the guiding function of the first chamfered portion 12 of the plastic inner skeleton 1 can be guaranteed; More specifically, the included angle is preferably 67.5°. This angle can further optimize stress distribution while ensuring the guiding function, effectively reducing the probability of loosening of the connection point during subsequent use. At the same time, this angle also has good process feasibility in processing and manufacturing, which can reduce processing difficulty and cost, and improve the overall quality of the product.

[0023] like Figures 1 to 5 As shown, in some embodiments of this utility model, two limiting grooves 31 are provided on the top edge of the rubber skeleton 3; The design of the hollow limiting groove 31 can ensure lower static stiffness and improve fatigue resistance. Specifically, compared to solid or sharp-edged limiting structures, the hollow limiting groove 31 structure can significantly reduce stress concentration during repeated deformation (especially in the working area of ​​the shock-absorbing pad); in addition, the limiting groove 31 avoids excessive stretching or compression in local areas, thereby delaying the initiation and propagation of cracks in the rubber skeleton 3 caused by cyclic stress.

[0024] like Figures 1 to 5 As shown, in some embodiments of this utility model, a limiting rib 32 is provided on the inner wall of the limiting through groove 31; specifically, the limiting rib 32 has a wave-shaped structure; more specifically, the limiting rib 32 is provided on the side of the inner wall of the limiting through groove 31 away from the plastic inner skeleton 1. The limiting rib 32 provides controllable and directional reinforcement to the originally relatively flexible hollow limiting channel 31 area; when the shock-absorbing pad undergoes a large displacement and the limiting channel 31 begins to contact and play a limiting role, the internal wave-shaped limiting rib 32 can effectively resist excessive compression, twisting or collapse of the channel wall, and prevent structural failure caused by channel deformation. In addition, the wave-shaped structure itself has good stress dispersion characteristics. The presence of the limiting rib 32 further optimizes the stress distribution in the limiting groove 31 area. Especially when subjected to repeated impact and extrusion loads, it can effectively reduce the local stress peak of the rubber skeleton 3, significantly improve the fatigue resistance of this key area, and form a synergistic effect with the hollow limiting design. Moreover, compared to solid blocks or straight ribs, the wave-shaped design provides reinforcement while its wave shape itself has elastic space, so it has a relatively small impact on the increase of overall static stiffness and will not significantly weaken the original low static stiffness advantage.

[0025] like Figures 1 to 5 As shown, in some embodiments of this utility model, the left and right ends of the bottom surface of the plastic outer frame 2 are provided with mounting grooves 22, and the mounting grooves 22 are provided with barb structures 23. The barb structure 23 can hold the accessory in place to prevent it from coming out; Specifically, the plastic outer frame 2 is symmetrically provided with the barbed structure 23 on the left and right sides. During actual installation, the barbed structure 23 can be locked into the mounting point on the vehicle body to prevent it from falling out. No additional accessories are required, thereby reducing the failure rate.

[0026] like Figures 1 to 5 As shown, in some embodiments of this utility model, the hollow structure 4 includes a plurality of first hollow grooves 41; in each hollow structure 4, the number of first hollow grooves 41 is two, and the two first hollow grooves 41 are arranged opposite to each other. The plastic outer frame 2 has a hollow structure 4 at the top corner. This hollow structure 4 directly removes redundant materials in non-critical areas, achieving a significant weight reduction effect. It not only reduces material costs but also lightens the weight of the entire shock-absorbing pad, making it easier to install and transport, and reducing unnecessary loads on the supporting structure.

[0027] like Figures 1 to 5 As shown, in some embodiments of this utility model, a second hollow groove 24 is provided at the bottom of the plastic outer frame 2 corresponding to the position of the hollow structure 4; Similarly, the design of the second hollowed-out groove 24 enables the lightweight design of the shock-absorbing pad, reduces material costs, and facilitates the installation and transportation of the shock-absorbing pad.

[0028] like Figures 1 to 5 As shown, in some embodiments of this utility model, a second chamfer 25 is provided on the outer side of the top surface of the plastic outer frame 2; specifically, the second chamfer 25 is an R1 rounded corner; By setting the second chamfer 25, stress concentration points at the edge of the plastic outer frame 2 can be eliminated, preventing the plastic outer frame 2 from tearing due to sharp angle cutting during vibration. The arc transition guides the strain to be evenly distributed, thereby extending the fatigue life of the plastic outer frame 2.

[0029] This utility model provides a shock-absorbing pad under a plastic bracket for an automotive cooling module, which has the following advantages: First, the design of two limiting grooves 31 inside the rubber skeleton 3 ensures lower static stiffness and improves fatigue resistance. Second, the top corners of the plastic outer skeleton 2 are provided with hollow structures 4, which directly remove redundant materials in non-critical areas, achieving a significant weight reduction effect. This not only reduces material costs but also lightens the overall weight of the shock-absorbing pad, facilitating installation and transportation, and reducing unnecessary load on the support structure. Third, the inner top surface of the plastic inner skeleton 1 is provided with a first chamfer 12, which provides precise guidance for pressing in the accessory pins during installation. Fourth, the left and right ends of the bottom surface of the plastic outer skeleton 2 are provided with mounting grooves 22, and the mounting grooves 22 are provided with barbed structures 23. During actual installation, the barbed structures 23 can be engaged with the mounting points on the vehicle body to prevent them from coming out, eliminating the need for additional accessories and thus reducing the failure rate.

[0030] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A shock-absorbing pad under a plastic bracket for an automotive cooling module, characterized in that, It includes a plastic inner skeleton (1), a rubber skeleton (3) and a plastic outer skeleton (2) arranged sequentially from the inside to the outside, wherein the plastic inner skeleton (1) is a hollow structure; The top of the rubber skeleton (3) is provided with a central hole (5) that is compatible with the plastic inner skeleton (1). The upper end of the inner wall of the central hole (5) is provided with an annular groove (51). The upper end of the outer side of the plastic inner skeleton (1) is provided with a boss (11) that is compatible with the annular groove (51). The plastic outer frame (2) has a central hole (21) at the top that is compatible with the rubber frame (3). The plastic outer frame (2) has a hollow structure (4) at the top corner.

2. The shock-absorbing pad under the plastic bracket of an automotive cooling module according to claim 1, characterized in that, The plastic inner frame (1) has a first chamfer (12) on the inner side of its top surface.

3. The shock-absorbing pad under the plastic bracket of an automotive cooling module according to claim 2, characterized in that, The first chamfered portion (12) includes an inclined surface (121), and the angle between the plane containing the inclined surface (121) and the plane containing the top surface of the plastic inner skeleton (1) is 5-60°.

4. The shock-absorbing pad under the plastic bracket of an automotive cooling module according to claim 1, characterized in that, The top edge of the rubber skeleton (3) has two limiting grooves (31).

5. The shock-absorbing pad under the plastic bracket of an automotive cooling module according to claim 4, characterized in that, The inner wall of the limiting through groove (31) is provided with limiting ribs (32).

6. The shock-absorbing pad under the plastic bracket of an automotive cooling module according to claim 1, characterized in that, The plastic outer frame (2) has mounting grooves (22) on the left and right ends of its bottom surface, and the mounting grooves (22) are provided with barbed structures (23).

7. The shock-absorbing pad under the plastic bracket of an automotive cooling module according to claim 1, characterized in that, The hollow structure (4) includes several first hollow grooves (41).

8. The shock-absorbing pad under the plastic bracket of an automotive cooling module according to claim 7, characterized in that, In each of the hollow structures (4), there are two first hollow grooves (41), and the two first hollow grooves (41) are arranged opposite to each other.

9. The shock-absorbing pad under the plastic bracket of an automotive cooling module according to claim 1, characterized in that, The bottom of the plastic outer frame (2) is provided with a second hollow groove (24) corresponding to the position of the hollow structure (4).

10. The shock-absorbing pad under the plastic bracket of an automotive cooling module according to claim 1, characterized in that, The plastic outer frame (2) has a second chamfer (25) on the outer side of its top surface.

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