Vehicle-mounted camera and vehicle

Abstract

The utility model provides a vehicle-mounted camera and a vehicle, which can reduce the risk that cracks are generated on the surface and inside of a weld joint after the vehicle-mounted camera is welded and cooled, thereby ensuring the sealing performance of the vehicle-mounted camera. The vehicle-mounted camera comprises a first shell and a second shell, the first shell and the second shell are in butt joint and are welded and fixed through a welding seam, the surface, where the welding seam is formed, of the second shell protrudes out of the surface, where the welding seam is formed, of the first shell, and the area of the welding seam overlapped on the second shell is larger than that of the welding seam overlapped on the first shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of welding, concretely to a vehicle-mounted camera and vehicle. BACKGROUND

[0002] The existing vehicle-mounted camera adopts the integrated design of shell and lens, and two shells of the vehicle-mounted camera are welded together through laser.

[0003] The two shells have the same size at the welding position, the center of the laser welding head is connected to the butt joint surface of the two shells, and then welding is carried out. The welding includes two processes of melting and cooling. The two shells are made of aluminum alloy material, and contain alloy elements silicon and magnesium with different contents. When melting, aluminum, silicon and magnesium form aluminum-silicon-magnesium eutectic. The main component in the shell is aluminum, and the solidification point of the aluminum-silicon-magnesium eutectic is different from that of aluminum. When cooling, the aluminum-silicon-magnesium eutectic and aluminum form a cooling time difference. Thus, during the cooling process, the material shrinkage at the butt joint surface generates local stress, which causes cracks on the surface and inside of the laser welding after cooling, and cannot guarantee the sealing performance of the vehicle-mounted camera. SUMMARY

[0004] In view of the above problems, the utility model provides a vehicle-mounted camera and vehicle, which can solve the problem that cracks are easily generated after welding the two shells, and the sealing performance of the vehicle-mounted camera is poor.

[0005] The vehicle-mounted camera provided by the utility model in the first aspect comprises a first shell and a second shell, the first shell and the second shell are butted and welded and fixed by a welding seam, the surface of the second shell forming the welding seam is convex outward relative to the surface of the first shell forming the welding seam, and the area of the welding seam overlapping the second shell is larger than the area of the welding seam overlapping the first shell.

[0006] In the above manner, the projection area of the second shell at the butt joint is larger than the projection area of the first shell at the butt joint, and the volume of the welding seam in the second shell is larger than the volume of the welding seam in the first shell, so that the local stress generated when the first shell and the second shell made of different materials are welded and cooled is avoided from being too large, and the risk of generating cracks is reduced.

[0007] Optionally, the first shell and the second shell are both made of aluminum alloy material, and the content of silicon or magnesium elements in the aluminum alloy material of the first shell is higher than that in the aluminum alloy material of the second shell.

[0008] In the above manner, the molten silicon or magnesium elements are concentrated in the first shell, and the molten aluminum alloy generated by the welding seam in the first shell is less than that generated by the welding seam in the second shell, so that the risk of generating cracks in the vehicle-mounted camera is reduced.

[0009] Optionally, the distance by which the weld-forming surface of the second shell protrudes outwardly beyond the weld-forming surface of the first shell is 0.2-0.4mm.

[0010] By the above method, the protruding distance of the second shell relative to the first shell is appropriate, avoiding that the protruding distance is too short to cause the second shell to be easily welded through during welding, and avoiding that the protruding distance is too long to cause waste of welding material and to reduce the manufacturing cost of the second shell and to improve industrial practicability.

[0011] Optionally, the center line of the weld is located on the second shell and is close to the joint between the first shell and the second shell. By the above method, the center line and the gravity center of the weld are both on the second shell, which is beneficial to balance the local stress generated at the joint between the first shell and the second shell during welding.

[0012] Optionally, the size of the second shell is greater than the size of the first shell. By the above method, the overall size of the second shell is greater than the overall size of the first shell, and the lens of the vehicle-mounted camera can be mounted on the first shell.

[0013] Optionally, the second shell is made of 1xxx series aluminum alloy. By the above method, the elements magnesium and silicon in the second shell are further reduced.

[0014] The second aspect of the utility model provides a kind of vehicle, including the vehicle-mounted camera as described above. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic view of the vehicle-mounted camera in the initial state of prior art.

[0016] Figure 2 It is the structure schematic view of the vehicle-mounted camera in the joint state of prior art.

[0017] Figure 3 It is the partial schematic view of the vehicle-mounted camera in the joint state of prior art.

[0018] Figure 4 It is the partial schematic view of the vehicle-mounted camera with weld of prior art.

[0019] Figure 5 It is the structure schematic view of the vehicle-mounted camera with weld of prior art.

[0020] Figure 6 It is the structure schematic view of the vehicle-mounted camera in the initial state of the embodiment of the utility model.

[0021] Figure 7 It is the structure schematic view of the vehicle-mounted camera in the joint state of the embodiment of the utility model.

[0022] Figure 8is a partial schematic view of the vehicle-mounted camera in the butt joint state in the embodiment of the present utility model.

[0023] Figure 9 is a partial schematic view of the vehicle-mounted camera with the weld joint in the embodiment of the present utility model.

[0024] Figure 10 is a structural schematic view of the vehicle-mounted camera with the weld joint in the embodiment of the present utility model.

[0025] Reference signs:

[0026] 100, vehicle-mounted camera; 110, first shell; 120, second shell; 130, butt joint surface; 140, weld joint; 141, weld pool; 150, laser welding head; 151, laser;

[0027] 200, vehicle-mounted camera; 210, first shell; 220, second shell; 230, butt joint surface; 240, weld joint; 241, weld pool; 250, laser welding head; 251, laser. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present utility model.

[0029] <Vehicle-mounted camera 100 of prior art>

[0030] In order to facilitate the understanding of the technical solutions of the present utility model, the vehicle-mounted camera 100 in the prior art will be described in detail below with reference to the drawings.

[0031] <First shell 110 and second shell 120>

[0032] Reference Figure 1 and Figure 2 Some vehicle-mounted cameras 100 in the prior art include a first shell 110 and a second shell 120. The first shell 110 and the second shell 120 can be spliced together through a butt joint surface 130. The first shell 110 and the second shell 120 are both made of aluminum alloy material, and the contents of silicon and magnesium in the first shell 110 and the second shell 120 are different. The content of silicon or magnesium elements in the aluminum alloy material of the first shell 110 is higher than that in the aluminum alloy material of the second shell 120.

[0033] <Weld joint 140>

[0034] In combination Figure 2 , and with reference to Figure 3 , the first shell 110 and the second shell 120 need to be spliced through the butt joint surface 130 before welding. Since the first shell 110 and the second shell 120 have the same size, the first shell 110 and the second shell 120 are flush at the butt joint surface 130.

[0035] With reference to Figure 4 , the laser welding head 150 is used to weld at the butt joint surface 130, and the center of the laser 151 generated by the laser welding head 150 is arranged on the butt joint surface 130. After the laser 151 is activated, the laser 151 of the laser welding head 150 irradiates the butt joint surface 130, so that a part of the first shell 110 and the second shell 120 around the butt joint surface 130 is melted to form a welding pool 141, and the welding pool 141 forms a weld 140 after cooling.

[0036] In combination Figure 4 , and with reference to Figure 5 , the laser 151 of the laser welding head 150 surrounds the butt joint surface 130 of the first shell 110 and the second shell 120 to form a circle of welds 140, and the first shell 110 and the second shell 120 are welded to each other.

[0037] In the welding process of the vehicle-mounted camera 100 in the prior art, the first shell 110 and the second shell 120 melted by the laser 151 in the welding pool 141 are equal in amount, and the contents of silicon and magnesium in the first shell 110 and the second shell 120 are different. That is, the main alloying elements of one of the two shells are silicon and magnesium, and during welding, the local part of the two shells at the butt joint is melted to form a liquid welding pool 141. Part of the silicon and magnesium in the welding pool 141 forms an aluminum-silicon-magnesium eutectic crystal with the main component aluminum of the two shells, that is, at this time, the welding pool 141 is mainly liquid aluminum with a small amount of aluminum-silicon-magnesium eutectic crystal. Since the solidification point of the aluminum liquid is high, the aluminum liquid cools first during cooling, and the aluminum-silicon-magnesium eutectic crystal has a low solidification point. After the aluminum liquid in the welding pool 141 solidifies into a solid, the aluminum-silicon-magnesium eutectic crystal is still in a liquid state, so the welding pool 141 is in a solid-liquid mixed state. When the welding pool 141 continues to cool and cools below the solidification point of the aluminum-silicon-magnesium eutectic crystal, the just-solidified aluminum-silicon-magnesium eutectic crystal is easily pulled out of the crack by the stress generated by the cooling contraction in the welding pool 141, so that the weld 140 has cracks.

[0038] <The vehicle-mounted camera 200 in the embodiment of the utility model>

[0039] The utility model provides a vehicle camera 200 can reduce the risk of crack of vehicle camera 200 after welding, guarantee the sealing property of vehicle camera 200.

[0040] The utility model discloses a vehicle camera 200, which can reduce the risk of crack of the vehicle camera 200 after welding, guarantee the sealing property of the vehicle camera 200.

[0041] <First shell 210, second shell 220>

[0042] Reference Figure 6 And Figure 7 The vehicle camera 200 comprises a first shell 210 and a second shell 220. The first shell 210 and the second shell 220 are spliced through an abutting surface 230. Both the first shell 210 and the second shell 220 are made of aluminum alloy material, and the content of silicon or magnesium elements in the aluminum alloy material of the first shell 210 is higher than that in the aluminum alloy material of the second shell 220. Specifically, the first shell 210 is made of 6xxx series aluminum alloy, and the second shell 220 is made of 1xxx series aluminum alloy. In this way, the content of magnesium and silicon elements in the second shell 220 is further reduced.

[0043] It should be noted that the content of silicon or magnesium elements in the aluminum alloy material of the first shell 210 is higher than that in the aluminum alloy material of the second shell 220 means that the content of silicon elements in the aluminum alloy material of the first shell 210 is higher than that in the aluminum alloy material of the second shell 220, and / or the content of magnesium elements in the aluminum alloy material of the first shell 210 is higher than that in the aluminum alloy material of the second shell 220.

[0044] In combination with Figure 9 , and in reference to Figure 8 The surface of the second shell 220 at the abutting surface 230 is outwardly convex relative to the surface of the first shell 210 at the abutting surface 230, and the convex distance is 0.2-0.4mm.

[0045] In this way, the convex distance of the second shell 220 relative to the first shell 210 is appropriate, so that more material of the second shell 220 (the aluminum in the second shell 220 is purer) is in the welding pool 241, and after the alloy elements (silicon and magnesium) in the first shell 210 neutralize in the liquid welding pool 241, the overall content of silicon and magnesium is reduced, thereby reducing the possibility of crack. In actual welding, according to the convex distance range of the second shell 220, the welding seam 240 is not easy to crack, mass production can be carried out, and the industrial practicability is improved.

[0046] In reference to Figure 6, the size of the second shell 220 is greater than the size of the first shell 210. The overall size of the second shell 220 is greater than the overall size of the first shell 210, and the lens of the vehicle-mounted camera 200 can be mounted on the first shell 210.

[0047] <weld 240>

[0048] With reference to Figure 8 and Figure 9 , the first shell 210 and the second shell 220 form a weld pool 241 at the butt joint surface 230 by welding, and the weld pool 241 forms a weld 240 after cooling, thereby fixing the first shell 210 and the second shell 220. The surface of the second shell 220 at the weld 240 is outwardly convex relative to the surface of the first shell 210 at the weld 240, so that the volume of the weld 240 in the second shell 220 is greater than the volume of the weld 240 in the first shell 210.

[0049] In the above manner, the area covered by the weld 240 on the second shell 220 is greater than the area covered by the weld 240 on the first shell 210, and the projected area of the second shell 220 on the butt joint surface 230 is greater than the projected area of the first shell 210 on the butt joint surface 230. The volume of the second shell 220 in the weld pool 241 is greater than the volume of the first shell 210 in the weld pool 241, avoiding the situation that the content of silicon and magnesium in the mixed weld pool 241 formed during welding of the first shell 210 and the second shell 220 with different silicon and magnesium contents at the weld 240 is in a relatively large state due to equal volume, thereby reducing the risk of crack defects in the weld 240.

[0050] With reference to Figure 9, the center line of the weld 240 is located on the second shell 220 and is close to the butt joint surface 230. In this way, the center line of the weld 240 is deviated to the second shell 220, and the center of gravity of the weld 240 is also on the second shell 220. The 6xxx series aluminum alloy melted by the laser 251 in the weld 240 is only a small part, and most of it is the 1xxx series aluminum alloy of the second shell 220. When cooled, the molten aluminum in the second shell 220 and the first shell 210 has a different solidification time of the aluminum silicon magnesium eutectic generated by the 6xxx series aluminum alloy of the first shell 210. Because the volume of the first shell 210 in the welding pool 241 is less than that of the second shell 220, the proportion of silicon and magnesium in the mixed weld 240 is reduced, thereby reducing the amount of aluminum silicon magnesium eutectic. After the molten aluminum in the welding pool 241 solidifies into a solid, a small amount of aluminum silicon magnesium eutectic is in a liquid state, and the welding pool 241 is in a solid-liquid mixed state. When the welding pool 241 continues to cool until below the solidification point of the aluminum silicon magnesium eutectic, the just-solidified aluminum silicon magnesium eutectic is very easy to be pulled out of the crack by the stress generated by the cold shrinkage in the welding pool 241. Because the content of the aluminum silicon magnesium eutectic in the welding pool 241 is reduced, the risk of the weld 240 is reduced.

[0051] In combination Figure 9 , and with reference to Figure 10 , the laser 251 of the laser welding head 250 surrounds the surface of the second shell 220 close to the butt joint surface 230 to form a circle of weld 240, thereby welding the first shell 210 and the second shell 220 to each other.

[0052] Further, when the ratio of the distance between the center line of the weld 240 and the butt joint surface 230 to the width of the weld 240 is 0.16-0.33, cracks are not easy to occur, and mass production can be carried out.

[0053] The working process of the vehicle-mounted camera 200 according to the working principle of the vehicle-mounted camera 200 of the embodiment of the present application will be described below.

[0054] First, the first shell 210 and the second shell 220 are spliced together through the butt joint surface 230, and the second shell 220 protrudes outward relative to the first shell 210 at the butt joint surface 230. The center of the laser 251 generated by the laser welding head 250 is arranged on the second shell 220 and is close to the butt joint surface 230. The laser 251 is activated and irradiated onto the second shell 220 to melt a part of the second shell 220 and a part of the first shell 210 close to the butt joint surface 230, thereby forming a welding pool 241. The welding pool 241 is cooled to form a weld 240. The laser 251 surrounds the butt joint surface 230 to form a circle of weld 240, thereby welding and fixing the first shell 210 and the second shell 220 together.

[0055] In addition, in some other embodiments of the present application, the welding seam in the welding mode can be arranged between the lens of the vehicle camera and the third shell. The third shell is the shell directly contacting with the lens, and the size of the third shell is larger than that of the lens. The lens and the third shell are butted through the second butt joint surface and are welded and fixed by the welding seam. The surface of the third shell forming the welding seam is outwardly protruding relative to the surface of the lens forming the welding seam, and the center of the welding seam is arranged on the third shell.

[0056] By offsetting the welding seam to the third shell and welding along the circumference of the second butt joint surface, the content of silicon and magnesium in the mixed welding pool formed by the welding of the lens shell and the third shell with different silicon and magnesium contents is in a relatively high state due to the equal volume, thereby reducing the risk of crack defects of the welding seam.

[0057] The present application also provides a vehicle comprising the vehicle camera as described above.

[0058] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vehicle-mounted camera comprising a first housing and a second housing which are butted and fixed with a weld seam, characterized in that, The surface of the second shell forming the weld is outwardly convex to the surface of the first shell forming the weld, and the area of the weld overlapping the second shell is greater than the area of the weld overlapping the first shell.

2. The vehicle camera according to claim 1, characterized by, The first shell and the second shell are both made of aluminum alloy material, and the content of silicon or magnesium in the aluminum alloy material of the first shell is higher than the content of silicon or magnesium in the aluminum alloy material of the second shell.

3. The vehicle camera of claim 1, wherein, The surface of the second shell forming the weld is outwardly convex to the surface of the first shell forming the weld by a distance of 0.2-0.4mm.

4. The vehicle camera of claim 1, wherein, The center line of the weld is located on the second shell and is close to the abutment of the first shell and the second shell.

5. The vehicle camera according to claim 3, characterized by, The size of the second shell is greater than the size of the first shell.

6. The vehicle camera of claim 2, wherein, The second shell is made of 1xxx series aluminum alloy.

7. A vehicle characterized by comprising: A vehicle-mounted camera comprising the shell as claimed in any one of claims 1-6.

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