Metal-plastic composite structure

Abstract

The utility model discloses a metal plastic composite structure which comprises a metal piece and a plastic piece, the metal piece is provided with a plurality of clamping bodies, the plastic piece is provided with a plurality of clamping grooves, the clamping bodies are matched with the clamping grooves in a one-to-one correspondence mode, and each clamping body comprises a clamping column and a clamping protrusion connected with the clamping column. The clamping groove is provided with a first end and a second end corresponding to the first end, the width of the clamping groove is gradually reduced from the first end to the second end, the width of the second end is smaller than the diameter of the clamping column, and the extending direction from the first end to the second end of the clamping groove is consistent with the rotating path of the plastic part. One end of the clamping column is connected with the metal piece, the other end of the clamping column is connected with the clamping protrusion, the clamping groove is an arc-shaped groove, the extending direction of the clamping groove is consistent with the rotating path of the plastic piece, the side wall of the clamping groove is made of elastic materials, the width of the second end of the clamping groove is smaller than the diameter of the clamping column, the clamping column is allowed to be pressed in and locked through elastic deformation, and the second end clamps the clamping column. And further, the metal piece and the plastic piece are fixed together.

Description

Technical Field

[0001] This utility model relates to the field of material joining technology, specifically to metal-plastic composite structures. Background Technology

[0002] With the increasing demand for lightweight and multifunctional designs, the automotive parts, consumer electronics, and medical devices industries often require composite bonding of metals (such as aluminum alloys) and plastics to balance structural strength, lightweighting, and functional integration. Currently, the mainstream process in the industry is injection molding, which involves first processing an aluminum alloy substrate, placing it in an injection mold, and then using high-temperature molten plastic to flow through the mold and encapsulate the metal part. The connection is achieved through mechanical interlocking caused by the cooling and shrinkage of the plastic. However, some high-performance engineering plastics (such as PEEK and PEI) have excessively high melting points, which can easily lead to oxidation or deformation of the metal surface during injection molding, reducing the bonding strength. Furthermore, injection molds need to be customized according to the product shape, with development costs typically ranging from tens of thousands to hundreds of thousands of yuan, resulting in high overall costs. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model proposes a metal-plastic composite structure that allows the locking pin to be pressed in and locked through elastic deformation, thereby securing the second end to the locking pin and fixing the metal and plastic parts together, which greatly saves production time and costs.

[0004] The technical solution adopted by this utility model is as follows: A metal-plastic composite structure includes a metal part and a plastic part. The metal part is provided with multiple locking bodies, and the plastic part is provided with multiple locking slots. The multiple locking bodies and the multiple locking slots are matched one-to-one. The locking body includes a locking post and a locking protrusion connected to the locking post. The locking slot has a first end and a second end corresponding to the first end. The width of the locking slot gradually decreases from the first end to the second end. The width of the second end is smaller than the diameter of the locking post. The extension direction of the locking slot from the first end to the second end is consistent with the rotation path of the plastic part.

[0005] One end of the locking pin connects to a metal component, and the other end connects to a locking protrusion. The locking groove is an arc-shaped groove whose extension direction is consistent with the rotation path of the plastic component. Since the sidewall of the locking groove is made of an elastic material, the width of the second end of the groove is smaller than the diameter of the locking pin. Through elastic deformation, the locking pin is allowed to be pressed in and locked, so that the second end clamps the locking pin, thereby fixing the metal component and the plastic component together. In this embodiment, the metal component and the plastic component are easy to process, greatly saving production time and costs.

[0006] Optionally, the diameter of the protrusion is smaller than the width of the first end and larger than the width of the second end.

[0007] Optionally, the metal part is provided with a positioning block, and the plastic part is provided with a positioning groove that cooperates with the positioning block. The positioning groove includes a first groove and a second groove that communicates with the first groove. The first groove is provided with a first inclined surface, and the positioning block is provided with a second inclined surface with the same inclination as the first inclined surface. The positioning groove is provided with a limiting protrusion that extends from the first inclined surface to the second groove.

[0008] Optionally, the positioning block has a third end and a fourth end corresponding to the third end, the diameter of the positioning block gradually increases from the third end to the fourth end, and the fourth end abuts against the limiting protrusion.

[0009] Optionally, the plastic part includes a plastic connecting plate and a plastic extension, wherein the plastic connecting plate has a plastic extension on one side and the slot on the other side.

[0010] Optionally, the plastic connecting disc is circular, and a plurality of the card bodies are spaced apart along the circumference of the plastic connecting disc.

[0011] Optionally, the slot does not extend through the plastic connecting disc.

[0012] The beneficial effects of this utility model are as follows: one end of the locking post is connected to a metal part, and the other end of the locking post is connected to a locking protrusion. The locking groove is an arc-shaped groove, and its extension direction is consistent with the rotation path of the plastic part. Since the sidewall of the locking groove is made of elastic material, the width of the second end of the locking groove is smaller than the diameter of the locking post. Through elastic deformation, the locking post is allowed to be pressed in and locked, so that the second end clamps the locking post, thereby fixing the metal part and the plastic part together. The metal part and the plastic part in this embodiment are easy to process, which greatly saves production time and cost. Initially, the locking protrusion is placed in the first end, and the positioning block is placed in the first groove accordingly. The plastic part is rotated so that the locking protrusion is engaged in the second end. The positioning block slides from the first groove into the second groove through the sliding guide of the first inclined surface and the second inclined surface, and abuts against the limiting protrusion to restrict the reverse rotation of the plastic part, prevent the connection from loosening, and ensure that the plastic part and the metal part are firmly connected. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the metal-plastic composite structure proposed in the embodiments of this utility model;

[0014] Figure 2 This is a schematic diagram of a plastic part with a metal-plastic composite structure proposed in an embodiment of this utility model;

[0015] Figure 3 This is an initial assembly drawing of the metal and plastic parts proposed in this embodiment of the utility model;

[0016] Figure 4 This is an assembly drawing of the metal and plastic parts after rotation, as proposed in an embodiment of this utility model.

[0017] The markings in the attached figures are as follows: 1. Metal part; 11. Locking body; 111. Locking post; 112. Locking protrusion; 12. Positioning block; 121. Third end; 122. Fourth end; 123. Second inclined surface; 2. Plastic part; 21. Locking groove; 211. First end; 212. Second end; 22. Positioning groove; 221. First groove; 222. Second groove; 223. First inclined surface; 224. Limiting protrusion; 23. Plastic connecting plate; 24. Plastic extension part. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] like Figures 1 to 4 As shown, this embodiment discloses a metal-plastic composite structure, including a metal part 1 and a plastic part 2. The metal part 1 is provided with a plurality of locking bodies 11, and the plastic part 2 is provided with a plurality of locking slots 21. The plurality of locking bodies 11 and the plurality of locking slots 21 are correspondingly engaged. The locking body 11 includes a locking post 111 and a locking protrusion 112 connected to the locking post 111. The locking slot 21 has a first end 211 and a second end 212 corresponding to the first end 211. The width of the locking slot 21 gradually decreases from the first end 211 to the second end 212. The width of the second end 212 is smaller than the diameter of the locking post 111. The extending direction of the locking slot 21 from the first end 211 to the second end 212 is consistent with the rotation path of the plastic part 2. One end of the locking pin 111 is connected to the metal part 1, and the other end is connected to the locking protrusion 112. The locking groove 21 is an arc-shaped groove, and its extension direction is consistent with the rotation path of the plastic part 2. Since the sidewall of the locking groove 21 is made of elastic material, the width of the second end 212 of the locking groove 21 is smaller than the diameter of the locking pin 111. Through elastic deformation, the locking pin 111 is allowed to be pressed in and locked, so that the second end 212 clamps the locking pin 111, thereby fixing the metal part 1 and the plastic part 2 together. In this embodiment, the metal part 1 and the plastic part 2 are easy to process, which greatly saves the time and cost of production and manufacturing.

[0020] In this embodiment, as Figure 2 As shown, the diameter of the latching protrusion 112 is smaller than the width of the first end 211 and larger than the width of the second end 212. This ensures that the latching protrusion 112 can enter the latching groove 21 from the first end 211 and is locked into the second end 212 after the plastic part 2 is rotated.

[0021] like Figure 3 and 4As shown, the metal part 1 is provided with a positioning block 12, and the plastic part 2 is provided with a positioning groove 22 that cooperates with the positioning block 12. The positioning groove 22 includes a first groove 221 and a second groove 222 communicating with the first groove 221. The first groove 221 is provided with a first inclined surface 223, and the positioning block 12 is provided with a second inclined surface 123 with the same inclination as the first inclined surface 223. The positioning groove is provided with a limiting protrusion 224 extending from the first inclined surface to the second groove. Initially, the locking protrusion 112 is inserted into the first end 211, and the positioning block 12 is correspondingly inserted into the first groove 221. The plastic part 2 is rotated so that the locking protrusion 112 is engaged with the second end 212. The positioning block 12 slides from the first groove 221 into the second groove 222 through the sliding guide of the first inclined surface 223 and the second inclined surface 123, and abuts against the limiting protrusion 224 to restrict the reverse rotation of the plastic part 2, prevent the connection from loosening, and ensure that the plastic part 2 and the metal part 1 are firmly connected.

[0022] In this embodiment, as Figure 1 As shown, the positioning block 12 has a third end 121 and a fourth end 122 corresponding to the third end 121. The diameter of the positioning block 12 gradually increases from the third end 121 to the fourth end 122. The fourth end 122 abuts against the limiting protrusion 224. The shape of the positioning block 12 can be conical or triangular.

[0023] like Figure 1 and 2 As shown, the plastic component 2 includes a plastic connecting plate 23 and a plastic extension 24. The plastic connecting plate 23 has the plastic extension 24 on one side and the slot 21 on the other side. The plastic connecting plate 23 is circular, and multiple slots 11 are spaced apart circumferentially along its surface. The extension is used to mount external components, enabling multi-functional integration. The side of the metal component 1 facing away from the plastic component 2 may also have a metal extension for mounting external components.

[0024] In this embodiment, as Figure 1 and 2 As shown, the slot 21 does not penetrate the plastic connecting plate 23. This non-penetration of the slot 21 avoids stress concentration and improves the strength of the plastic connecting plate 23.

[0025] It is understood that the specific embodiments described above are merely for explaining the relevant utility model and not for limiting the utility model. It should also be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict with each other. All equivalent structural transformations made based on the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly included within the protection scope of this utility model.

Claims

1. A metal-plastic composite structure, characterized in that, The device includes metal and plastic parts. The metal parts have multiple locking bodies, and the plastic parts have multiple locking slots. The locking bodies and the locking slots are matched one-to-one. Each locking body includes a locking post and a locking protrusion connected to the locking post. Each locking slot has a first end and a second end corresponding to the first end. The width of the locking slot gradually decreases from the first end to the second end. The width of the second end is smaller than the diameter of the locking post. The extension direction of the locking slot from the first end to the second end is consistent with the rotation path of the plastic part.

2. The metal-plastic composite structure according to claim 1, characterized in that, The diameter of the protrusion is smaller than the width of the first end and larger than the width of the second end.

3. The metal-plastic composite structure according to claim 1, characterized in that, The metal part is provided with a positioning block, and the plastic part is provided with a positioning groove that cooperates with the positioning block. The positioning groove includes a first groove and a second groove that communicates with the first groove. The first groove is provided with a first inclined surface, and the positioning block is provided with a second inclined surface with the same inclination as the first inclined surface. The positioning groove is provided with a limiting protrusion that extends from the first inclined surface to the second groove.

4. The metal-plastic composite structure according to claim 3, characterized in that, The positioning block has a third end and a fourth end corresponding to the third end. The diameter of the positioning block gradually increases from the third end to the fourth end, and the fourth end abuts against the limiting protrusion.

5. The metal-plastic composite structure according to claim 3, characterized in that, The plastic component includes a plastic connecting plate and a plastic extension. The plastic connecting plate has the plastic extension on one side and the slot on the other side.

6. The metal-plastic composite structure according to claim 1, characterized in that, The plastic connecting disc is circular, and multiple card bodies are spaced apart along the circumference of the plastic connecting disc.

7. The metal-plastic composite structure according to claim 1, characterized in that, The slot does not penetrate the plastic connecting disc.

Images