An automobile tail lamp housing

Abstract

This utility model relates to the field of automotive parts technology, and in particular to an automotive taillight housing, comprising a housing and a housing base. The housing is made of PP-TD40 material, and its inner side at the open end has a first stepped surface. The housing base is made of PC-ABS material, with one end being a welding end and the other end being a connecting end. The outer side of the connecting end has a second stepped surface, which interlocks with the first stepped surface in the thickness direction of the housing, so that the housing and the housing base form an integrated housing structure. This utility model proposes an automotive taillight housing in which a housing base made of PC-ABS material and a housing made of PP-TD40 material are interlocked through stepped surfaces, so that the housing and the housing base form an integrated housing structure. While ensuring welding reliability, this effectively reduces the weight of the housing, solving the technical problem that existing single PC-ABS housings cannot simultaneously meet the requirements of welding performance and lightweight design.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to an automotive taillight housing. Background Technology

[0002] With the rapid development of the automotive industry and the increasing demands of consumers for vehicle appearance and safety performance, automotive taillights, as an important component that combines lighting, signal indication, and aesthetic design, are increasingly trending towards lightweight, high sealing, and high integration in their structural design.

[0003] In practical applications of taillight housings, areas used for welding to the vehicle body or lamp holder (such as the housing) need to have high welding stability to withstand the high temperatures generated during ultrasonic welding or hot plate welding; while non-welded areas (such as the main housing) focus more on lightweighting, impact resistance, and material cost control.

[0004] Currently, traditional automotive taillight housings are mostly made by integral injection molding of a single PC-ABS material (such as one type of automotive taillight, authorized announcement number CN203464114U). Although PC-ABS has good weldability and dimensional stability, it has a high density and cost, and its melt flow is usually low. In thin-walled lightweight designs, it is prone to problems such as insufficient filling and internal stress concentration, making it difficult to simultaneously meet the comprehensive requirements of lightweighting and weld reliability. Utility Model Content

[0005] In view of this, this utility model proposes an automotive taillight housing, in which a PC-ABS housing base and a PP-TD40 housing are joined together by a stepped surface to form an integrated housing structure. While ensuring welding reliability, this effectively reduces the weight of the housing and solves the technical problem that existing single PC-ABS housings cannot simultaneously meet the requirements of welding performance and lightweight design.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a taillight housing for automobiles, comprising a housing and a housing base, wherein... The shell is made of PP-TD40 material, and a first stepped surface is provided on the inner side of its opening end; The housing is made of PC-ABS material, with one end being a welding end and the other end being a connecting end; The outer side of the connecting end is provided with a second stepped surface, which is interlocked with the first stepped surface in the thickness direction of the lamp housing, so that the housing and the housing base form an integral lamp housing structure.

[0007] Based on the above technical solutions, preferably, the first stepped surface and the second stepped surface form a multi-step-shaped interface in the interlocking area.

[0008] Based on the above technical solutions, preferably, the length of the bonding interface along the interlocking direction is greater than 5mm.

[0009] Based on the above technical solutions, preferably, the height difference between the first stepped surface and the second stepped surface along the thickness direction of the lamp housing is 0.3mm to 0.8mm.

[0010] Based on the above technical solutions, preferably, the housing is continuously arranged along the circumferential direction of the opening of the housing to form a closed annular structure.

[0011] Based on the above technical solutions, preferably, the side of the welding end away from the shell is the welding surface.

[0012] Based on the above technical solutions, preferably, the welding surface is a plane.

[0013] Based on the above technical solutions, preferably, the outer edge of the opening end of the shell is provided with a flange.

[0014] Based on the above technical solutions, preferably, the wall thickness of the shell is 1.5mm to 2.0mm.

[0015] Based on the above technical solutions, preferably, the surface of the shell is provided with reinforcing ribs.

[0016] The automotive taillight housing of this utility model has the following advantages over the prior art: (1) By setting a shell made of PP-TD40 material and a base made of PC-ABS material, and the two are interlocked in the thickness direction through the first and second stepped surfaces to form an integrated lamp shell structure, the excellent heat resistance and welding stability of PC-ABS are retained in the welding area, while the low density and high toughness of PP-TD40 are used to achieve lightweighting in the non-welding area, effectively taking into account both welding reliability and lightweight design requirements.

[0017] (2) By forming a multi-level stepped interface in the interlocking area, the contact area between the shell and the base is significantly increased and a mechanical interlocking effect is generated, which effectively suppresses interface separation caused by the difference in thermal expansion coefficient of materials or external vibration, and improves the connection strength and long-term sealing reliability.

[0018] (3) By setting the length of the interface along the interlocking direction to be greater than 5mm, sufficient interlocking path is ensured, so that the two materials have good pull-out resistance after integral molding, and micro gaps or leakage are avoided due to excessively short interlocking. At the same time, the difference in fitting height between the first step surface and the second step surface along the thickness direction is controlled within the range of 0.3mm to 0.8mm, which ensures tight interlocking to prevent leakage, and avoids excessive interference causing stress concentration in injection molding or difficulty in demolding, thus taking into account both sealing performance and molding processability.

[0019] (4) By setting a flange on the outer edge of the shell opening, the structural rigidity of the opening edge is enhanced, which effectively prevents deformation during assembly or transportation. At the same time, reinforcing ribs are set on the shell surface to further improve the rigidity and deformation resistance of the thin-walled structure and ensure the overall structural stability under the lightweight design. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of a car taillight housing according to the present invention; Figure 2 for Figure 1 A schematic diagram of a partial structure; Figure 3 This is a schematic diagram of a partial structure of the shell; Figure 4 This is a schematic diagram of a partial structure of the shell base; In the figure: 1. Shell; 2. Shell base; 101. First stepped surface; 102. Flange; 201. Welding end; 202. Connection end; 2021. Second stepped surface. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0024] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and 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 the embodiments of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0028] like Figure 1-4 As shown, the present invention provides a taillight housing for automobiles, comprising a housing 1 and a housing base 2.

[0029] The shell 1 is made of PP-TD40 material, which is an existing polypropylene-based composite material with high toughness and fluidity, and is suitable for lightweight thin-walled structures.

[0030] The housing 2 is made of PC-ABS material, which is an existing polycarbonate-acrylonitrile-butadiene-styrene copolymer. It has excellent heat resistance and dimensional stability and can reliably withstand the high temperature during subsequent ultrasonic or hot plate welding processes.

[0031] One end of the housing 2 is a welding end 201, and the other end is a connecting end 202. The outer side of the connecting end 202 is provided with a second stepped surface 2021. Correspondingly, the inner side of the opening end of the housing 1 is provided with a first stepped surface 101.

[0032] During manufacturing, the housing 1 and the base 2 are integrally molded using a two-color injection molding process, allowing the second stepped surface 2021 and the first stepped surface 101 to interlock in the thickness direction of the lamp housing, forming an inseparable, one-piece lamp housing structure. This structure fully utilizes the welding reliability of PC-ABS material in the welding area, while using PP-TD40 material in the non-welding area to achieve lightweighting, effectively balancing the dual requirements of welding performance and lightweight design. The thickness direction of the lamp housing refers to... Figure 1 The Y direction is indicated by the XY coordinates.

[0033] Furthermore, the first stepped surface 101 and the second stepped surface 2021 form a multi-stepped interface in the mating area. This multi-stepped structure significantly increases the actual contact area between the shell 1 and the base 2, and creates a mechanical interlocking effect at the interface between the two materials. This effectively suppresses the interface separation tendency caused by the difference in thermal expansion coefficients between PP-TD40 and PC-ABS or external vibrations during vehicle operation, thereby improving the overall connection strength and long-term sealing reliability. The mating interface along the mating direction refers to... Figure 1 The X direction is indicated by the XY coordinates.

[0034] The length of the aforementioned interface along the mating direction is greater than 5mm. This length ensures a sufficient mating path, enabling the housing 1 and the housing base 2 to have sufficient pull-out resistance after integral molding, thus avoiding the risk of micro-gaps or leakage due to insufficient mating during assembly, transportation, or use.

[0035] Meanwhile, the height difference between the first stepped surface 101 and the second stepped surface 2021 along the thickness direction of the lamp housing is controlled within the range of 0.3mm to 0.8mm. This height difference ensures a tight fit between the mating parts, preventing moisture or dust from seeping in, while also avoiding stress concentration or demolding difficulties caused by excessive interference during injection molding, thus balancing sealing performance and molding process feasibility.

[0036] After the lamp housing is injection molded, the housing base 2 is continuously arranged circumferentially along the opening of the housing 1, forming a closed ring structure. This ring layout makes the welding area form a complete closed loop, effectively blocking the path of external environmental media (such as water, dust, etc.) to enter the lamp cavity circumferentially, and significantly improving the overall airtightness and environmental adaptability of the taillight.

[0037] The side of the welding end 201 away from the housing 1 constitutes the welding surface. This arrangement keeps the welding operation area away from the housing 1, avoiding thermal damage to the outer surface of the housing 1 caused by high temperature.

[0038] Furthermore, the welding surface is flat, ensuring uniform stress and consistent melting during ultrasonic or hot plate welding, effectively preventing incomplete welding, off-center welding, or local sealing failure caused by surface undulations, thus improving welding quality and product consistency.

[0039] In this embodiment, a flange 102 is provided on the outer edge of the opening end of the housing 1. The flange 102 enhances the structural rigidity of the opening edge of the housing 1, effectively resisting external forces during assembly or transportation and preventing deformation of the opening of the housing 1.

[0040] In addition, the wall thickness of the shell 1 is 1.5mm to 2.0mm. With the support of the excellent flowability of PP-TD40 material, this thin-walled structure can significantly reduce the overall weight while maintaining sufficient impact resistance and structural stability, meeting the comprehensive requirements of modern automobiles for lightweighting and safety.

[0041] Furthermore, the surface of the housing 1 is provided with reinforcing ribs. These reinforcing ribs are used to improve the rigidity and deformation resistance of the thin-walled housing 1, effectively suppressing warping caused by vehicle vibration or temperature changes.

[0042] The present invention relates to a car taillight housing, which is formed and used in the following manner: The housing 1 and the housing base 2 are integrally molded using a two-color injection molding process, and the second stepped surface 2021 and the first stepped surface 101 interlock in the thickness direction of the lamp housing to form an inseparable one-piece lamp housing structure. This process is a well-known and mature technology in the field, which can ensure that the two materials are firmly bonded in the interlocking area.

[0043] The molded lamp housing can be directly used for assembly with lamp covers or body parts. The welding end 201 of the housing 2 is connected to the adjacent parts by ultrasonic or hot plate welding to achieve reliable sealing and fixation.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A taillight housing for automobiles, characterized in that: Includes a shell (1) and a base (2), wherein, The shell (1) is made of PP-TD40 material, and a first stepped surface (101) is provided on the inner side of its opening end. The housing (2) is made of PC-ABS material, with one end being a welding end (201) and the other end being a connecting end (202). The outer side of the connecting end (202) is provided with a second stepped surface (2021), and the second stepped surface (2021) and the first stepped surface (101) are fitted together in the thickness direction of the lamp housing, so that the housing (1) and the housing base (2) form an integrated lamp housing structure.

2. The automotive taillight housing as described in claim 1, characterized in that: The first stepped surface (101) and the second stepped surface (2021) form a multi-step-shaped interface in the interlocking area.

3. The automotive taillight housing as described in claim 2, characterized in that: The length of the interface along the mating direction is greater than 5 mm.

4. The automotive taillight housing as described in claim 1, characterized in that: The difference in fitting height between the first stepped surface (101) and the second stepped surface (2021) along the thickness direction of the lamp housing is 0.3mm to 0.8mm.

5. The automotive taillight housing as described in claim 1, characterized in that: The housing (2) is continuously arranged circumferentially along the opening of the housing (1) to form a closed ring structure.

6. The automotive taillight housing as described in claim 1, characterized in that: The side of the welding end (201) away from the shell (1) is the welding surface.

7. The automotive taillight housing as described in claim 6, characterized in that: The welding surface is a plane.

8. The automotive taillight housing as described in claim 1, characterized in that: The outer edge of the opening end of the housing (1) is provided with a flange (102).

9. The automotive taillight housing as described in claim 1, characterized in that: The wall thickness of the shell (1) is 1.5 mm to 2.0 mm.

10. The automotive taillight housing as described in claim 1, characterized in that: The surface of the shell (1) is provided with reinforcing ribs.

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