Hot plate welding positioning tool and hot plate welding machine

Abstract

The application provides a hot plate welding positioning tool and a hot plate welding machine, and relates to the technical field of vehicle lamps, which can improve the stability of lamp shell positioning. The hot plate welding positioning tool is used for vehicle lamps, and the hot plate welding positioning tool comprises a mold and a locking mechanism. The mold has a cavity, and the cavity is configured to cooperate with the lamp shell of the vehicle lamp. The lamp shell has a positioning hole, and the depth direction of the positioning hole has an angle with the ejection direction of the lamp shell. The locking mechanism comprises a driving member and a positioning pin. The output end of the driving member is connected with the positioning pin and is configured to drive the positioning pin to move along the axial direction relative to the mold, so that the positioning pin cooperates with or separates from the positioning hole. In the application, the cooperation of the positioning pin and the positioning hole can reduce the risk of the lamp shell being ejected from the mold, has high connection precision, high connection stiffness, small dependence on external energy and small failure risk, and is beneficial to improving the positioning stability of the lamp shell.

Description

Technical Field

[0001] This application relates to the field of automotive lighting technology, and in particular to a hot plate welding positioning fixture and a hot plate welding machine. Background Technology

[0002] The lamp housing and lamp cover of automotive lights are often welded using hot plate welding. Hot plate welding is a plastic welding process. During the welding process, the surfaces of the lamp housing and lamp cover to be joined are first heated and melted by a high-temperature hot plate. Then the hot plate is removed, and the lamp housing and lamp cover are brought close together to press the surfaces of the lamp housing and lamp cover to be joined together. After holding for a period of time, they are cooled to complete the welding.

[0003] During hot plate welding, the lamp housing needs to be positioned. Generally, the lamp housing is placed inside a conformal mold, and a locking mechanism is used to fix the lamp housing to the mold, reducing the risk of the lamp housing detaching from the mold. Related technologies often use grippers to hold the exposed connecting bolts on the lamp housing to fix it to the mold. The connecting bolts are used to connect to the vehicle body, and the lamp housing is then installed on the vehicle body.

[0004] However, the risk of the clamp coming loose results in poor stability of the lamp housing positioning. Utility Model Content

[0005] This application provides a hot plate welding positioning fixture and a hot plate welding machine, which can improve the stability of lamp housing positioning.

[0006] In a first aspect, this application provides a hot plate welding positioning fixture for automotive lamps. The hot plate welding positioning fixture includes a mold and a locking mechanism. The mold has a cavity configured to mate with the lamp housing of the automotive lamp. The lamp housing has a positioning hole, the depth direction of which forms an angle with the demolding direction of the lamp housing. The locking mechanism includes a drive component and a positioning pin. The output end of the drive component is connected to the positioning pin and configured to drive the positioning pin to move axially relative to the mold, causing the positioning pin to engage or disengage from the positioning hole.

[0007] The hot plate welding positioning fixture provided in this application has a drive component whose output end can drive the positioning pin to move axially relative to the mold, allowing the positioning pin to engage or disengage with the positioning hole. The depth direction of the positioning hole forms an angle with the mold ejection direction of the lamp housing. When the positioning pin engages with the positioning hole, it can limit the lamp housing in the mold ejection direction, reducing the risk of the lamp housing coming out of the mold and providing high positioning stability. The positioning pin can also disengage from the positioning hole under the drive of the drive component, making it less likely for the lamp housing to interfere with the positioning pin during the process of entering the mold, allowing the lamp housing to smoothly enter the mold.

[0008] Compared to related technologies where grippers hold exposed connecting bolts on the lamp housing, the engagement of the locating pin and locating hole in this application offers higher connection precision and rigidity, thus improving the positioning stability of the lamp housing. Furthermore, the gripper-based bolt holding method requires the grippers to continuously apply significant force to the bolts, posing an energy dependency and failure risk. In contrast, the engagement of the locating pin and locating hole in this application inherently limits the lamp housing's position, reducing reliance on external energy and minimizing the risk of failure, further enhancing the lamp housing's positioning stability. In addition, the engagement of the locating pin and locating hole in this application also reduces bolt damage and occupies less space.

[0009] Therefore, this application can improve the stability of lamp housing positioning.

[0010] In some possible implementations of this application, the outer surface of the lamp housing is raised to form a bump, and a positioning hole is formed on the bump. A limiting groove is formed on the inner surface of the cavity, and the limiting groove penetrates the mold along the demolding direction to form an opening, through which the bump can extend into the limiting groove and engage with the limiting groove.

[0011] By forming the positioning hole on the protrusion, the positioning hole does not need to penetrate the thickness of the lamp housing wall, yet it still has sufficient depth to meet the requirement of a secure connection with the positioning pin. The fact that the positioning hole does not need to penetrate the housing wall helps to improve the sealing and strength of the lamp housing.

[0012] By forming a limiting groove on the inner surface of the cavity, the protrusion can extend into the limiting groove through the opening and cooperate with the limiting groove. This allows the protrusion to not only be used to connect with the positioning pin, but also to cooperate with the limiting groove, thereby improving the stability of the fit between the lamp housing and the cavity. In this way, the protrusion is fully utilized, which is conducive to improving the compactness of the structure.

[0013] In some possible implementations of this application, the wall of the lamp housing is bent towards the interior of the lamp housing to form a hidden groove. The hidden groove is located on the outer surface of the lamp housing, and the depth direction of the hidden groove is the same as the demolding direction. A protrusion is formed on the inner surface of the hidden groove, and at least one end of the positioning hole faces outward from the hidden groove. The inner surface of the cavity protrudes to form a limiting block, which engages with the hidden groove.

[0014] By forming the protrusion on the inner surface of the concealed groove, the protrusion is less exposed, making it less likely to interfere with the vehicle body when the lamp housing is installed, and also reducing the risk of bumps and knocks during lamp housing transportation. Furthermore, bending the lamp housing wall towards the interior facilitates the formation of the concealed groove, making the lamp housing easier to manufacture.

[0015] By aligning the limiting block with the hidden groove, the hidden groove can not only conceal the protrusion but also cooperate with the limiting block, thereby improving the reliability of the lamp housing and mold installation. In this way, the hidden groove is fully utilized, which is conducive to improving the compactness of the structure.

[0016] By aligning the depth direction of the hidden groove with the demolding direction, the limiting block can smoothly extend into the hidden groove along its depth direction during the process of placing the lamp housing into the mold, making it easier to install the lamp housing within the cavity.

[0017] By aligning at least one end of the positioning hole with the outside of the concealed groove, the positioning pin can smoothly enter the concealed groove along the depth direction of the positioning hole and connect with the positioning hole. During this process, the positioning pin is less likely to interfere with the lamp housing.

[0018] In some possible implementations of this application, along the first direction, the hidden groove is located at one end of the lamp housing, the hidden groove penetrates the lamp housing along the first direction, and the depth direction and the demolding direction of the positioning hole are both perpendicular to the first direction.

[0019] By positioning the hidden groove at one end of the lamp housing along the first direction, and extending the hidden groove through the lamp housing along the first direction, the arrangement of components inside the lamp housing becomes more convenient. It is understandable that the hidden groove is formed by bending the wall of the lamp housing. If the hidden groove were located in the middle of the lamp housing along the first direction, the space at the bottom inside the lamp housing would be divided into two parts arranged along the first direction, making the arrangement of components inside the lamp housing more inconvenient.

[0020] In some possible implementations of this application, the bump is constructed as a convex plate, and the positioning hole penetrates the convex plate along its thickness direction.

[0021] By constructing the protrusion as a protruding plate, the shape of the protrusion is relatively simple, making it easier to process and manufacture, and allowing the protrusion to be easily injection molded integrally with the lamp housing wall. By making the positioning hole penetrate the protruding plate along its thickness direction, the cross-sectional area of ​​the positioning hole can be set to be relatively large, which is beneficial for a stable connection between the positioning hole and the positioning pin.

[0022] In some possible implementations of this application, the outer surface of the lamp housing is raised, forming a protrusion, and a positioning hole is formed in the protrusion. The inner surface of the cavity includes an abutment portion, and when the lamp housing mates with the cavity, the abutment portion and the protrusion are positioned opposite each other along the depth direction of the positioning hole. The driving member is configured to drive the lamp housing to move relative to the mold, causing the protrusion to abut against the abutment portion.

[0023] In this way, the positioning pin can not only position the lamp housing radially, but also drive the protrusion to abut against the abutment part, and together with the abutment part, position the protrusion axially, thereby positioning the lamp housing, which helps to improve the stability of the lamp housing positioning.

[0024] In some possible implementations of this application, the sidewall of the locating pin protrudes radially outward to form a stop portion, which is configured to clamp the protrusion together with the abutment portion.

[0025] In this way, the locating pin can position the lamp housing along the axial and radial directions, which helps to improve the stability of the lamp housing positioning.

[0026] In some possible implementations of this application, the positioning hole is a through hole, and the abutment portion is formed with a clearance hole. When the cavity and the lamp housing are fitted together, the clearance hole and the positioning hole are aligned. On any plane perpendicular to the axis of the positioning hole, the orthographic projection of the positioning hole does not exceed the orthographic projection of the clearance hole.

[0027] By making the positioning hole a through hole, the positioning pin can extend a considerable length into the positioning hole, which improves the stability of the connection between the positioning pin and the positioning hole. By forming a clearance hole in the abutment part, the orthographic projection of the positioning hole does not exceed the orthographic projection of the clearance hole in any plane perpendicular to the axis of the positioning hole. This allows the positioning pin to extend into the clearance hole after passing through the positioning hole. On the one hand, this allows the end of the positioning pin near the clearance hole to extend a considerable distance beyond the positioning hole, which improves the stability of the connection between the positioning pin and the positioning hole. On the other hand, it makes it less likely for the positioning pin to interfere with the abutment part, which helps reduce damage to the positioning pin. Furthermore, the inner wall of the clearance hole can support the positioning pin, allowing the force exerted by the lamp housing on the positioning pin to be transmitted to the inner wall of the clearance hole, which helps improve the stability of the lamp housing positioning.

[0028] In some possible implementations of this application, the mold is formed with a guide hole that connects the cavity to the external space of the cavity. When the cavity and the lamp housing are fitted together, the guide hole and the positioning hole are aligned, and the positioning pin is configured to pass through the guide hole and connect to the positioning hole.

[0029] By connecting the locating pin through the guide hole and the locating hole, the locating pin is guided by the guide hole as it approaches the locating hole axially. This allows the locating pin to insert more accurately and smoothly into the locating hole and engage with it. Furthermore, the inner wall of the guide hole provides radial support for the locating pin, transferring the force exerted by the lamp housing on the locating pin to the inner wall of the guide hole, thus improving the stability of the lamp housing's positioning. In addition, the guide hole is formed in the mold, allowing the mold to not only engage with the lamp housing but also guide the locating pin. This fully utilizes the mold, reducing the need for other structures to limit the radial movement of the locating pin and improving the overall structural compactness.

[0030] Secondly, this application provides a hot plate welding machine, which includes the hot plate welding positioning fixture provided in the first aspect of this application.

[0031] The hot plate welding machine provided in this application, including the hot plate welding positioning fixture provided in the first aspect of this application, can achieve the same technical effect as the hot plate welding positioning fixture, that is, it can improve the stability of lamp housing positioning. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the hot plate welding positioning fixture in some embodiments of this application; Figure 2 This is a schematic diagram of the lamp housing moving from the first initial position into the cavity in an embodiment of this application; Figure 3 This is a schematic diagram of the positioning pin moving from the second initial position to the positioning hole in an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures: 01. Lamp housing; 011. Protrusion; 0111. Positioning hole; 012. Hidden groove; 1. Mold; 11. Limiting block; 111. Limiting groove; 1111. Abutting part; 11111. First guide surface; 1112. Limiting part; 11121. Second guide surface; 1113. Bottom surface; 112. Clearance hole; 113. Guide hole; 2. Locking mechanism; 21. Driving component; 22. Positioning pin; 221. Stop part. Detailed Implementation

[0035] The technical solutions in this application will now be described clearly and in detail with reference to the accompanying drawings.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating 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.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0040] Please refer to Figure 1 , Figure 2 and Figure 3 This application provides a hot plate welding positioning fixture for automotive lights. The hot plate welding positioning fixture includes a mold 1 and a locking mechanism 2. The mold 1 has a cavity configured to mate with the lamp housing 01 of the automotive light. The lamp housing 01 has a positioning hole 0111. The depth direction of the positioning hole 0111 forms an angle with the mold release direction z of the lamp housing 01. The locking mechanism 2 includes a driving member 21 and a positioning pin 22. The output end of the driving member 21 is connected to the positioning pin 22 and configured to drive the positioning pin 22 to move axially relative to the mold 1, so that the positioning pin 22 engages or disengages from the positioning hole 0111.

[0041] Please refer to Figure 1 , Figure 2 and Figure 3 The hot plate welding positioning fixture provided in this application embodiment has a drive component 21 whose output end can drive the positioning pin 22 to move axially relative to the mold 1, so that the positioning pin 22 can engage or disengage with the positioning hole 0111. The depth direction of the positioning hole 0111 forms an angle with the mold exit direction z of the lamp housing 01. When the positioning pin 22 engages with the positioning hole 0111, the positioning pin 22 can limit the lamp housing 01 in the mold exit direction z, which can reduce the risk of the lamp housing 01 coming out of the mold 1 and the positioning stability is high. The positioning pin 22 can be disengaged from the positioning hole 0111 under the drive of the drive component 21, so that the lamp housing 01 is less likely to interfere with the positioning pin 22 during the process of the lamp housing 01 entering the mold 1, and the lamp housing 01 can smoothly enter the mold 1.

[0042] Please refer to Figure 1 , Figure 2 and Figure 3Compared to related technologies where grippers hold exposed connecting bolts on the lamp housing, the engagement of the positioning pin 22 and the positioning hole 0111 in this embodiment provides higher connection accuracy and rigidity, which is beneficial for improving the positioning stability of the lamp housing 01. Furthermore, the gripper-based bolt holding method requires the grippers to continuously apply significant force to the bolt, which is energy-dependent and carries a risk of failure. In contrast, the engagement of the positioning pin 22 and the positioning hole 0111 in this embodiment can inherently limit the position of the lamp housing 01, reducing reliance on external energy and the risk of failure, thus improving the positioning stability of the lamp housing 01. In addition, the engagement of the positioning pin 22 and the positioning hole 0111 in this embodiment also reduces bolt damage and occupies less space.

[0043] Therefore, the embodiments of this application can improve the stability of the positioning of the lamp housing 01.

[0044] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the depth direction of the positioning hole 0111 is perpendicular to the mold release direction z of the lamp housing 01. This makes the positioning pin 22 more stable in limiting the lamp housing 01 along the mold release direction z, and the lamp housing 01 is not easy to come out of the mold 1.

[0045] Please refer to Figure 1 , Figure 2 and Figure 3 It should be explained that the ejection direction z is the direction in which the lamp housing 01 exits the mold 1. Generally, the ejection direction z is the upward direction along the vertical. During the welding process, the direction from the lamp housing 01 to the lamp shade is the same as the ejection direction z, and the lamp housing 01 and the lamp shade are positioned opposite each other along the ejection direction z.

[0046] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the driving component 21 is a cylinder. The cylinder has a simple structure, fast output speed, and large movement amplitude, which is beneficial to improving the production cycle.

[0047] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the positioning pin 22 is made of a metal material, such as stainless steel. This gives the positioning pin 22 high strength and rigidity, making it less prone to deformation and damage, and ensuring stable positioning of the lamp housing 01. In some embodiments of this application, the mold 1 is made of a metal material, such as stainless steel. This gives the mold 1 high strength and rigidity, and ensures stable positioning of the lamp housing 01.

[0048] Please refer to Figure 1 , Figure 2 and Figure 3 The locking mechanism 2 and the positioning holes 0111 can be at least two, and are set in a one-to-one correspondence. The position of the positioning holes 0111 on the lamp housing 01 can be set according to the positioning requirements. In this way, the positioning stability of the lamp housing 01 can be improved.

[0049] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the vehicle lights can be taillights, such as through taillights. Through taillights have the same meaning as commonly understood by those skilled in the art to which this application pertains, and are an integrated lighting design that spans the entire rear of the vehicle and connects the taillights on the left and right sides.

[0050] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the outer surface of the lamp housing 01 is raised to form a protrusion 011, and a positioning hole 0111 is formed on the protrusion 011. A limiting groove 111 is formed on the inner surface of the cavity. The limiting groove 111 penetrates the mold 1 along the demolding direction z and forms an opening. The protrusion 011 can extend into the limiting groove 111 through the opening and cooperate with the limiting groove 111.

[0051] By forming the positioning hole 0111 on the protrusion 011, the positioning hole 0111 does not need to penetrate the shell wall along the thickness direction of the lamp housing 01, but it can still have sufficient depth to meet the requirement of a stable connection with the positioning pin 22. The positioning hole 0111 does not need to penetrate the shell wall, which is beneficial to improving the sealing performance and strength of the lamp housing 01.

[0052] By forming a limiting groove 111 on the inner surface of the cavity, the protrusion 011 can extend into the limiting groove 111 through the opening and cooperate with the limiting groove 111. This allows the protrusion 011 to not only be used to connect with the positioning pin 22, but also to cooperate with the limiting groove 111, thereby improving the stability of the lamp housing 01 and the cavity. In this way, the protrusion 011 is fully utilized, which is conducive to improving the compactness of the structure.

[0053] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the protrusion direction of the bump 011 is opposite to or perpendicular to the mold ejection direction z. This allows the bump 011 to be inserted into the limiting groove 111 more smoothly during the process of placing the lamp housing 01 into the mold 1.

[0054] Please refer to Figure 1 , Figure 2 and Figure 3In some embodiments of this application, the depth direction of the limiting groove 111 is opposite to the demolding direction z, that is, the depth direction of the limiting groove 111 is the same as the placement direction of the lamp housing 01 into the mold 1. When the protrusion 011 cooperates with the limiting groove 111, the bottom surface 1113 of the limiting groove 111 abuts against the protrusion 011. In this way, the bottom surface 1113 of the limiting groove 111 can support the protrusion 011 in a vertically upward direction, which is beneficial to improving the stability of the housing installed in the mold 1.

[0055] Please refer to Figure 1 , Figure 2 and Figure 3 Of course, in some embodiments of this application, the depth direction of the limiting groove 111 can also be a direction perpendicular to the demolding direction z, etc.

[0056] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the wall of the lamp housing 01 is bent towards the interior of the lamp housing 01 to form a hidden groove 012. The hidden groove 012 is located on the outer surface of the lamp housing 01, and the depth direction of the hidden groove 012 is the same as the demolding direction z. A protrusion 011 is formed on the inner surface of the hidden groove 012, and at least one end of the positioning hole 0111 faces outward from the hidden groove 012. The inner surface of the cavity protrudes to form a limiting block 11, which engages with the hidden groove 012.

[0057] By forming the protrusion 011 on the inner surface of the concealed groove 012, the protrusion 011 is less exposed, making it less likely to interfere with the vehicle body when the lamp housing 01 is installed. It also reduces the risk of the protrusion 011 being bumped or knocked during transport. Furthermore, by bending the wall of the lamp housing 01 towards the inside of the lamp housing 01, the formation of the concealed groove 012 is facilitated, making the manufacturing of the lamp housing 01 easier.

[0058] By engaging the limiting block 11 with the hidden groove 012, the hidden groove 012 can not only hide the protrusion 011, but also engage with the limiting block 11, thereby improving the reliability of the installation of the lamp housing 01 and the mold 1. In this way, the hidden groove 012 is fully utilized, which is conducive to improving the compactness of the structure.

[0059] By making the depth direction of the hidden groove 012 the same as the demolding direction z, the limiting block 11 can smoothly extend into the hidden groove 012 along the depth direction of the hidden groove 012 during the process of placing the lamp housing 01 into the mold 1, making it easier to install the lamp housing 01 in the cavity.

[0060] By aligning at least one end of the positioning hole 0111 toward the outside of the hidden groove 012, the positioning pin 22 can smoothly enter the hidden groove 012 along the depth direction of the positioning hole 0111 and connect with the positioning hole 0111. During this process, the positioning pin 22 is less likely to interfere with the lamp housing 01.

[0061] Please refer to Figure 1 , Figure 2 and Figure 3 It is understood that, in the embodiments of this application, at least a portion of the limiting groove 111 is formed in the limiting block 11.

[0062] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the hidden groove 012 can be formed on the surface of the lamp housing 01 away from the lampshade, and the direction from the lamp housing 01 to the lampshade is the same as the demolding direction z. The surface area of ​​the lamp housing 01 away from the lampshade is larger, making it easier to arrange the hidden groove 012.

[0063] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the direction in which the limiting block 11 protrudes is the same as or perpendicular to the mold ejection direction z. This allows the limiting block 11 to smoothly enter the hidden groove 012 during the process of placing the lamp housing 01 into the mold 1. In some embodiments of this application, the lower end of the limiting block 11 and the end perpendicular to the mold ejection direction z may both be engaged with the inner surface of the cavity.

[0064] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the protrusion 011 may be formed on the bottom surface 1113 of the hidden groove 012, or on the side surface of the hidden groove 012, or connected to both the bottom surface 1113 and the side surface of the hidden groove 012.

[0065] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the limiting block 11 can be fitted to the bottom surface 1113 of the hidden groove 012 or to the side surface of the hidden groove 012. In this way, the fit between the limiting block 11 and the hidden groove 012 is relatively stable.

[0066] Please refer to Figure 1 , Figure 2 and Figure 3In some embodiments of this application, along the first direction y, the hidden groove 012 is located at one end of the lamp housing 01, the hidden groove 012 penetrates the lamp housing 01 along the first direction y, and the depth direction and the demolding direction z of the positioning hole 0111 are both perpendicular to the first direction y.

[0067] By positioning the hidden groove 012 at one end of the lamp housing 01 along the first direction y, and extending the hidden groove 012 through the lamp housing 01 along the first direction y, the arrangement of components inside the lamp housing 01 becomes more convenient. It is understood that the hidden groove 012 is formed by bending the wall of the lamp housing 01. If the hidden groove 012 were located in the middle of the lamp housing 01 along the first direction y, the space at the bottom inside the lamp housing 01 would be divided into two parts arranged along the first direction y, making the arrangement of components inside the lamp housing 01 less convenient.

[0068] Please refer to Figure 1 , Figure 2 and Figure 3 It is understood that in this embodiment of the application, the hidden groove 012 penetrates the lamp housing 01 along the first direction y, and the hidden groove 012 is closed at one end in the direction opposite to the first direction y.

[0069] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, along the second direction x, the hidden groove 012 is located at one end of the lamp housing 01, and the hidden groove 012 penetrates the lamp housing 01 along the second direction x. The second direction x is parallel to the depth direction of the positioning hole 0111, and the positioning hole 0111 faces outward from the hidden groove 012 along the second direction x. This also facilitates the arrangement of components inside the lamp housing 01.

[0070] Please refer to Figure 1 , Figure 2 and Figure 3 It is understood that in this embodiment of the application, the hidden groove 012 penetrates the lamp housing 01 along the second direction x, and the hidden groove 012 is closed at one end in the direction opposite to the second direction x.

[0071] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the bump 011 is constructed as a convex plate, and the positioning hole 0111 penetrates the convex plate along the thickness direction of the convex plate.

[0072] By constructing the protrusion 011 as a protruding plate, the shape of the protrusion 011 is relatively simple, making it easier to process and manufacture, and allowing the protrusion 011 to be easily integrally injection molded with the shell wall of the lamp housing 01. By making the positioning hole 0111 penetrate the protruding plate along the thickness direction, the cross-sectional area of ​​the positioning hole 0111 can be set to be relatively large, which is beneficial to the stable connection between the positioning hole 0111 and the positioning pin 22.

[0073] Please refer to Figure 1 , Figure 2 and Figure 3 It is understood that in the embodiments of this application, the direction in which the protrusion of the convex plate is perpendicular to the thickness direction of the convex plate.

[0074] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, one end of the convex plate is engaged with the bottom surface 1113 of the hidden groove 012, and the adjacent other end is engaged with the side surface of the hidden groove 012. This results in a high connection strength between the convex plate and the inner surface of the hidden groove 012. Here, the adjacent other end of the convex plate can be one end in a direction opposite to the first direction y.

[0075] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the convex plate is located in the middle of the hidden groove 012 along the thickness direction. In the bottom surface 1113 of the hidden groove 012, the portions of the convex plate on both sides along the thickness direction are in contact with the limiting block 11. This helps to improve the stability of the fit between the limiting block 11 and the hidden groove 012.

[0076] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the outer surface of the lamp housing 01 is raised, forming a protrusion 011, and a positioning hole 0111 is formed on the protrusion 011. The inner surface of the cavity includes an abutment portion 1111. When the lamp housing 01 mates with the cavity, the abutment portion 1111 and the protrusion 011 are disposed opposite each other along the depth direction of the positioning hole 0111. The driving member 21 is configured to drive the lamp housing 01 to move relative to the mold 1, so that the protrusion 011 abuts against the abutment portion 1111.

[0077] In this way, the positioning pin 22 can not only position the lamp housing 01 radially, but also drive the protrusion 011 to abut against the abutment part 1111, and together with the abutment part 1111, position the protrusion 011 axially, thereby positioning the lamp housing 01, which helps to improve the stability of the lamp housing 01 positioning.

[0078] Please refer to Figure 1 , Figure 2 and Figure 3 It is understood that in this embodiment of the application, the driving member 21 drives the lamp housing 01 to move relative to the mold 1 along the axial direction of the positioning pin 22 via the positioning pin 22, so that the protrusion 011 abuts against the abutting part 1111.

[0079] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the direction in which the positioning pin 22 extends into the positioning hole 0111 can be the direction from the protrusion 011 to the abutment portion 1111.

[0080] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the abutment portion 1111 can be formed on the inner surface of the limiting groove 111. In this way, even if a part of the inner surface of the limiting groove 111 is used as the abutment portion 1111, the formation of the abutment portion 1111 is more convenient, and there is no need to provide other structures for forming the abutment portion 1111 in the cavity, which is beneficial to improving the compactness of the structure.

[0081] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the limiting groove 111 further includes a limiting part 1112, which is disposed opposite to the abutment part 1111 and configured to jointly clamp the protrusion 011. It can be understood that when the lamp housing 01 mates with the cavity, the direction in which the limiting part 1112 and the abutment part 1111 are opposite is the same as the depth direction of the positioning hole 0111. In this way, the limiting groove 111 provides a more stable limit for the protrusion 011.

[0082] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the abutment portion 1111 is formed with a first guide surface 11111, and the end of the first guide surface 11111 away from the bottom surface 1113 of the limiting groove 111 is inclined in a direction away from the limiting portion 1112. In some embodiments of this application, the limiting portion 1112 may also be formed with a second guide surface 11121, and the end of the second guide surface 11121 away from the bottom surface 1113 of the limiting groove 111 is inclined in a direction away from the abutment portion 1111.

[0083] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the sidewall of the positioning pin 22 protrudes radially outward to form a stop portion 221, which is configured to clamp the protrusion 011 together with the abutment portion 1111.

[0084] In this way, the positioning pin 22 can position the lamp housing 01 along the axial and radial directions, which helps to improve the stability of the lamp housing 01 positioning.

[0085] Please refer to Figure 1 , Figure 2 and Figure 3It is understood that in the embodiments of this application, along the direction from the stop portion 221 to the abutment portion 1111, the stop portion 221 pushes the lamp housing 01 to move towards the abutment portion 1111, so that the protrusion 011 abuts against the abutment portion 1111.

[0086] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the positioning hole 0111 is a through hole, and the abutment portion 1111 is formed with a clearance hole 112. When the cavity and the lamp housing 01 are fitted together, the clearance hole 112 is aligned with the positioning hole 0111. In any plane perpendicular to the axis of the positioning hole 0111, the orthographic projection of the positioning hole 0111 does not exceed the orthographic projection of the clearance hole 112.

[0087] By making the positioning hole 0111 a through hole, the positioning pin 22 can extend into the positioning hole 0111 for a longer length, which helps to improve the stability of the connection between the positioning pin 22 and the positioning hole 0111. By forming a clearance hole 112 in the abutment portion 1111, the orthographic projection of the positioning hole 0111 does not exceed the orthographic projection of the clearance hole 112 in any plane perpendicular to the axis of the positioning hole 0111. This allows the positioning pin 22 to extend into the clearance hole 112 after passing through the positioning hole 0111. On the one hand, this allows the end of the positioning pin 22 near the clearance hole 112 to extend a longer distance beyond the positioning hole 0111, which is beneficial to improving the stability of the connection between the positioning pin 22 and the positioning hole 0111. On the other hand, it makes it less likely for the positioning pin 22 to interfere with the abutment portion 1111, which is beneficial to reducing damage to the positioning pin 22. Furthermore, it allows the inner wall of the clearance hole 112 to support the positioning pin 22, so that the force exerted by the lamp housing 01 on the positioning pin 22 can be transmitted to the inner wall of the clearance hole 112, which is beneficial to improving the stability of the lamp housing 01 positioning.

[0088] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the mold 1 is formed with a guide hole 113, which connects the cavity with the external space of the cavity. When the cavity and the lamp housing 01 are engaged, the guide hole 113 is aligned with the positioning hole 0111, and the positioning pin 22 is configured to pass through the guide hole 113 and connect with the positioning hole 0111.

[0089] By connecting the positioning pin 22 through the guide hole 113 to the positioning hole 0111, the positioning pin 22 is guided by the guide hole 113 as it approaches the positioning hole 0111 axially. This allows the positioning pin 22 to more accurately and smoothly enter the positioning hole 0111 and engage with it. Furthermore, the inner wall of the guide hole 113 provides radial support for the positioning pin 22, and the force exerted by the lamp housing 01 on the positioning pin 22 is transmitted to the inner wall of the guide hole 113, improving the stability of the lamp housing 01's positioning. In addition, the guide hole 113 is formed on the mold 1. Thus, the mold 1 not only engages with the lamp housing 01 but also guides the positioning pin 22. This fully utilizes the mold 1, reducing the need for other structures to limit the radial movement of the positioning pin 22 and improving the overall structural compactness.

[0090] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the guide hole 113 may be formed in the limiting portion 1112. In this way, the limiting portion 1112 is not only used to limit the protrusion 011, but also to form the guide hole 113. The limiting portion 1112 is fully utilized, which is beneficial to improving the compactness of the structure.

[0091] Please refer to Figure 1 , Figure 2 and Figure 3 To facilitate understanding, the welding process is described below. First, the lamp housing 01 is placed into the cavity from the first initial position a along the placement direction. During this process, the protrusion 011 is guided into the limiting groove 111 by the first guide surface 11111 and the second guide surface 11121. With the bottom surface 1113 of the limiting groove 111 supporting the protrusion 011, the lamp housing 01 is positioned in place. The first initial position a is... Figure 2 The position of the dotted line; then, driven by the drive member 21, the positioning pin 22 moves axially from the second initial position b, passing through the guide hole 113, the positioning hole 0111 and the clearance hole 112 in sequence, and the stop part 221 abuts against the protrusion 011, so that the stop part 221 and the limiting block 11 jointly clamp the protrusion 011. The second initial position b is Figure 3 The position of the dotted line; after the lamp cover and lamp housing 01 are welded, the upper mold moves away from the lamp cover along the mold release direction z. The upper mold is used to cooperate with the lamp cover and to fix the lamp cover. During this process, the positioning pin 22 can restrict the movement of the lamp housing 01 and the lamp cover in the mold release direction z.

[0092] Please refer to Figure 1 , Figure 2 and Figure 3 This application also provides a hot plate welding machine, which includes the hot plate welding positioning fixture provided in this application.

[0093] Please refer to Figure 1 , Figure 2 and Figure 3 The hot plate welding machine provided in this application embodiment, including the hot plate welding positioning fixture provided in this application embodiment, can achieve the same technical effect as the hot plate welding positioning fixture, that is, it can improve the stability of the lamp housing 01 positioning.

[0094] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way.

Claims

1. A hot plate welding positioning fixture for automotive lights, characterized in that, include: The mold (1) has a cavity configured to cooperate with the lamp housing (01) of the vehicle lamp, the lamp housing (01) having a positioning hole (0111) the depth direction of the positioning hole (0111) having an angle with the demolding direction of the lamp housing (01); The locking mechanism (2) includes a drive member (21) and a positioning pin (22). The output end of the drive member (21) is connected to the positioning pin (22) and is configured to drive the positioning pin (22) to move axially relative to the mold (1), so that the positioning pin (22) engages or disengages from the positioning hole (0111).

2. The hot plate welding positioning fixture according to claim 1, characterized in that, The outer surface of the lamp housing (01) is raised to form a protrusion (011), and the positioning hole (0111) is formed on the protrusion (011). The inner surface of the cavity forms a limiting groove (111), which penetrates the mold (1) along the demolding direction and forms an opening. The protrusion (011) can extend into the limiting groove (111) through the opening and cooperate with the limiting groove (111).

3. The hot plate welding positioning fixture according to claim 2, characterized in that, The wall of the lamp housing (01) is bent toward the inside of the lamp housing (01) to form a hidden groove (012). The hidden groove (012) is located on the outer surface of the lamp housing (01). The depth direction of the hidden groove (012) is the same as the demolding direction. The protrusion (011) is formed on the inner surface of the hidden groove (012). At least one end of the positioning hole (0111) faces outward from the hidden groove (012). The inner surface of the cavity protrudes to form a limiting block (11), which cooperates with the hidden groove (012).

4. The hot plate welding positioning fixture according to claim 3, characterized in that, Along the first direction, the hidden groove (012) is located at one end of the lamp housing (01), and the hidden groove (012) penetrates the lamp housing (01) along the first direction. The depth direction of the positioning hole (0111) and the demolding direction are both perpendicular to the first direction.

5. The hot plate welding positioning fixture according to claim 2, characterized in that, The protrusion (011) is constructed as a protruding plate, and the positioning hole (0111) penetrates the protruding plate along the thickness direction of the protruding plate.

6. The hot plate welding positioning fixture according to any one of claims 1 to 5, characterized in that, The outer surface of the lamp housing (01) is raised to form a protrusion (011), and the positioning hole (0111) is formed on the protrusion (011). The inner surface of the cavity includes an abutment portion (1111). When the lamp housing (01) mates with the cavity, the abutment portion (1111) is disposed opposite to the protrusion (011) along the depth direction of the positioning hole (0111). The drive member (21) is configured to drive the lamp housing (01) to move relative to the mold (1), so that the protrusion (011) abuts against the abutment (1111).

7. The hot plate welding positioning fixture according to claim 6, characterized in that, The sidewall of the positioning pin (22) protrudes radially outward to form a stop (221), which is configured to clamp the protrusion (011) together with the abutment (1111).

8. The hot plate welding positioning fixture according to claim 7, characterized in that, The positioning hole (0111) is a through hole; The abutting part (1111) is formed with a clearance hole (112). When the cavity is fitted with the lamp housing (01), the clearance hole (112) is aligned with the positioning hole (0111). In any plane perpendicular to the axis of the positioning hole (0111), the orthographic projection of the positioning hole (0111) does not exceed the orthographic projection of the clearance hole (112).

9. The hot plate welding positioning fixture according to any one of claims 1 to 5, characterized in that, The mold (1) has a guide hole (113) that connects the cavity to the external space of the cavity. When the cavity is fitted with the lamp housing (01), the guide hole (113) is aligned with the positioning hole (0111). The positioning pin (22) is configured to pass through the guide hole (113) and connect with the positioning hole (0111).

10. A hot plate welding machine, characterized in that, The hot plate welding positioning fixture includes any one of claims 1 to 9.

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