Assembly structure of plastic and iron sheet
By adopting rotating fit and stamping and riveting technology in the assembly structure of plastic parts and iron sheets, the problems of odor, power consumption and unstable fixation in the existing assembly methods are solved, and a stable connection and efficient and environmentally friendly production process is achieved.
Patent Information
- Application Number
- CN202422004149.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-17
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-17
AI Technical Summary
The assembly methods of existing plastics and iron sheets rely on electric heat melting, which have problems such as odor of burning glue, electricity consumption and not environmentally friendly, and the plastic parts with thin edges are not firmly fixed and easy to fall off.
The rotating matching structure between the plastic parts and the iron sheet is adopted. By setting up through holes and riveting convex edges on the iron sheet, and the riveting convex edges are riveted to the bottom side of the iron sheet by stamping technology, the stable connection between the plastic parts and the iron sheet is achieved.
The stable connection between plastic parts and iron pieces is achieved, which avoids odor and high power consumption during heating, and improves production efficiency and environmental protection.
Smart Images
Figure CN222880030U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an assembly structure of plastic and iron sheets. Background Art
[0002] The conventional assembly of plastic and iron sheets is fixed by electric hot melting, and the hot melting method relies on the heat generated by the heating tube at 370°C to melt the plastic. There is a burning smell in the production process, which is power-consuming and not environmentally friendly, and also affects the health of production personnel.
[0003] In addition, for plastic parts with thin edges, it is easy for the edges to melt, causing the plastic parts to be unable to be fixed and easy to fall off, such as some furniture connectors. Utility Model Content
[0004] The utility model aims to provide an assembly structure of plastic and iron sheet, comprising a plastic part and an iron sheet; the plastic part is rotatably mounted on the iron sheet around a predetermined axis; the iron sheet is provided with a through hole, and the through hole extends from the top side to the bottom side of the iron sheet; the predetermined axis is on the axis of the through hole; a hole edge extends upward from the top side of the through hole; a columnar portion and an annular groove surrounding the columnar portion are provided on the plastic part; the columnar portion is inserted into the through hole and can rotate relative to the through hole; the hole edge falls into the annular groove and can rotate relative to the annular groove; a plurality of riveted convex edges are provided on the bottom side edge of the columnar portion; the rivet convex edges are evenly spaced around the predetermined axis; the rivet convex edges are flattened by stamping and riveted to the bottom side of the iron sheet.
[0005] The bottom side edge of the through hole is provided with a rounded edge; the riveted protrusion is riveted on the rounded edge;
[0006] The riveting convex edge which is flattened by punching has an arc surface which matches with the rounded edge and a bulge in the gap between the columnar part and the through hole.
[0007] Both ends of the iron piece are provided with through holes; the plastic piece comprises two, and the two plastic pieces are rotatably connected with the two through holes respectively; and a connecting hole is provided on the columnar part of each plastic piece.
[0008] The edge of the iron sheet is provided with a supporting edge portion extending downward.
[0009] An angle limiting mechanism is provided between each plastic part and the iron sheet; the angle limiting mechanism includes a limiting protrusion provided on the iron sheet and an arc groove provided on the plastic part; the arc groove extends circumferentially along a predetermined axis, and the two ends of the arc groove respectively have a first retaining wall and a second retaining wall, and the limiting protrusion falls into the arc groove and rotates between the first retaining wall and the second retaining wall.
[0010] The plastic part is made of polypropylene (PP).
[0011] The connecting hole is in the shape of a quadrangular pyramid.
[0012] The plastic part and the iron sheet part of the utility model are rotatably matched, and the riveted convex edge of the plastic part is riveted to the iron sheet part through a stamping process, so that the plastic part will not loosen when rotating; the stamping riveting does not require heating, has high production efficiency, and is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic structural diagram of the top side of the utility model.
[0014] Figure 2 It is a schematic structural diagram of the bottom side of the utility model.
[0015] Figure 3 and Figure 4 It is a structural exploded view of the utility model at different angles.
[0016] Figure 5 It is a schematic diagram of the matching structure between the plastic part and the iron sheet before stamping of the utility model.
[0017] Figure 6-8 A schematic diagram of the assembly process of the utility model. DETAILED DESCRIPTION
[0018] The present application scheme is further described as follows in conjunction with the accompanying drawings:
[0019] See attached Figure 1-8 , a plastic and iron sheet assembly structure, comprising a plastic part 2 and an iron sheet 1; the plastic part 2 is rotatably mounted on the iron sheet 1 around a predetermined axis L; the iron sheet 1 is provided with a through hole 11, and the through hole 11 extends from the top side to the bottom side of the iron sheet 1; the predetermined axis L is on the axis of the through hole 11; a hole edge 12 extends upward from the top side of the through hole 11; the plastic part 2 is provided with a cylindrical portion 21 and an annular groove 24 surrounding the cylindrical portion 21; the cylindrical portion 21 is inserted into the through hole 11 and can rotate relative to the through hole 11; the hole edge 12 falls into the annular groove 24 and can rotate relative to the annular groove 24; that is, the plastic part 2 rotates in cooperation with the through hole 11 through the cylindrical portion 21, and guides and limits the hole edge 12 through the cooperation of the annular groove 24 to improve the stability of rotation.
[0020] The bottom edge of the columnar portion 21 is provided with a plurality of riveted protrusions 22 ; the riveted protrusions 22 are evenly spaced around the predetermined axis L; and the riveted protrusions 22 are flattened by stamping and riveted to the bottom side of the iron sheet 1 .
[0021] The plastic part 2 and the iron sheet 1 of the utility model are rotatably matched, and the riveting protrusion 22 of the plastic part 2 is riveted to the iron sheet 1 through a stamping process, so that the plastic part 2 will not loosen when rotating; stamping riveting does not require heating, has high production efficiency, and is energy-saving and environmentally friendly.
[0022] In this embodiment, four riveting protrusions 22 are provided.
[0023] The bottom edge of the through hole 11 is provided with a rounded edge 111; the riveted flange 22 is riveted on the rounded edge 111; the riveted flange 22 flattened by stamping has an arc surface 222 matching the rounded edge 111 and a protrusion 221 in the gap between the columnar portion 21 and the through hole 11.
[0024] When the riveted protrusion 22 is stamped, it contacts the rounded edge 111 and is squeezed and deformed to form an arc surface that fits the rounded edge 111. The arc surface cooperates with the rotation to reduce resistance. In addition, part of the riveted protrusion 22 is squeezed between the gap between the plastic part 2 and the iron sheet part 1, narrowing the gap for rotational cooperation, which can reduce shaking during rotation and improve assembly stability.
[0025] Both ends of the iron piece 1 are provided with through holes 11 ; the plastic piece 2 includes two plastic pieces 2 , which are rotatably connected to the two through holes 11 respectively; and a connecting hole 25 is provided on the columnar portion 21 of each plastic piece 2 .
[0026] The iron sheet 1 of the technical solution is rotationally riveted to the two plastic parts 2, and the connecting holes 25 on the plastic parts 2 are used to connect with other parts, that is, the technical solution can be used as a connector connecting two parts.
[0027] The edge of the iron sheet 1 is provided with a supporting edge 14 extending downwards, which is used to raise the iron sheet 1 and provide a rotation space for the riveted convex edge 22 at the bottom side thereof.
[0028] In this embodiment, the front and rear side edges of the iron sheet 1 are folded downward to form the supporting edge portions 14 .
[0029] An angle limiting mechanism is provided between each plastic part 2 and the iron sheet part 1; the angle limiting mechanism includes a limiting protrusion 13 provided on the iron sheet and an arc groove 23 provided on the plastic part 2; the arc groove 23 extends circumferentially around a predetermined axis L, and the two ends of the arc groove 23 respectively have a first retaining wall 231 and a second retaining wall 232, and the limiting protrusion 13 falls into the arc groove 23 and rotates between the first retaining wall 231 and the second retaining wall 232.
[0030] The technical solution limits the rotation range of the plastic part 2 by setting a rotation angle limiting mechanism. When the limiting protrusion 13 rotates in the arc groove 23, it stops when it is resisted by the first stop wall 231 or the second stop wall 232.
[0031] The plastic part 2 is made of polypropylene (PP).
[0032] PP plastic has very good mechanical properties, and its molding and processing performance is good. It does not rebound when subjected to impact. Therefore, when PP plastic molded products with relatively small volume are riveted with iron sheets, they can be fixed by impact squeezing and flattening.
[0033] The connection hole 25 is in the shape of a quadrangular pyramid, that is, the connection hole 25 has a hole wall surrounded by four oblique cones. When other components are inserted into the connection hole 25 from the bottom side of the columnar portion 21, they fit tightly with the gradually narrowing hole wall, which is beneficial to improve the stability of the connection.
[0034] like Figure 6-8 As shown, the assembly process of the plastic part 2 and the iron piece 1 is as follows:
[0035] 1. Insert the columnar portion 21 of the plastic part 2 into the through hole 11 of the iron piece 1, and let the riveted convex edge 22 of the columnar portion 21 penetrate from the bottom side of the through hole 11 and expose. At the same time, let the hole edge 12 of the through hole 11 fall into the annular groove 24, and the limiting convex portion 13 fall into the arc groove 23;
[0036] 2. Start the punching machine to punch the riveting protrusion 22 to flatten it so that it is riveted to the bottom side of the iron sheet 1.
[0037] The above-mentioned preferred implementation modes should be regarded as illustrative examples of the implementation modes of the present application scheme. Any technical deductions, replacements, improvements, etc. that are identical or similar to the present application scheme or made based on this scheme should be regarded as within the scope of protection of this patent.
Claims
1. A plastic and iron sheet assembly structure, comprising a plastic part and an iron sheet; characterized in that: The plastic part is rotatably mounted on the iron piece around a predetermined axis; The iron sheet is provided with a through hole, and the through hole extends from the top side to the bottom side of the iron sheet; the predetermined axis is on the axis of the through hole; the top side of the through hole extends upward with a hole edge; the plastic part is provided with a columnar portion and an annular groove surrounding the columnar portion; the columnar portion is inserted into the through hole and can rotate relative to the through hole; the hole edge falls into the annular groove and can rotate relative to the annular groove; The bottom side edge of the columnar portion is provided with a plurality of riveted convex edges; the riveted convex edges are evenly spaced and distributed around the predetermined axis; the riveted convex edges are flattened by stamping and riveted to the bottom side of the iron sheet.
2. The assembly structure of plastic and iron sheet according to claim 1, characterized in that: The bottom side edge of the through hole is provided with a rounded edge; the riveted protrusion is riveted on the rounded edge; The riveting convex edge which is flattened by punching has an arc surface which matches with the rounded edge and a bulge in the gap between the columnar part and the through hole.
3. The assembly structure of plastic and iron sheet according to claim 2, characterized in that: Both ends of the iron piece are provided with through holes; the plastic piece comprises two, and the two plastic pieces are rotatably connected with the two through holes respectively; and a connecting hole is provided on the columnar part of each plastic piece.
4. The assembly structure of plastic and iron sheet according to claim 3, characterized in that: The edge of the iron sheet is provided with a supporting edge portion extending downward.
5. The assembly structure of plastic and iron sheet according to claim 3, characterized in that: An angle limiting mechanism is provided between each plastic part and the iron sheet part; The rotation angle limiting mechanism includes a limiting convex portion provided on the iron sheet and an arc groove provided on the plastic part; The arc-shaped groove extends circumferentially around a predetermined axis, and the two ends of the arc-shaped groove respectively have a first retaining wall and a second retaining wall, and the limiting protrusion falls into the arc-shaped groove and rotates between the first retaining wall and the second retaining wall.
6. The assembly structure of plastic and iron sheet according to any one of claims 1 to 5, characterized in that: The plastic part is made of polypropylene.
7. The assembly structure of plastic and iron sheet according to claim 3, characterized in that: The connecting hole is in the shape of a quadrangular pyramid.