Special-shaped gasket
By designing the through hole and through groove structure of the special-shaped gasket, the problems of large thickness and poor stability of the existing gasket are solved, and a low-cost and high-stability screw locking effect is achieved, which is suitable for automobile lamps.
Patent Information
- Application Number
- CN202422967515.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-02
AI Technical Summary
When existing gaskets are used in automotive headlights, their large thickness leads to high costs, affecting the locking depth and lamp strength. At the same time, metal screws are prone to damage the PP material after locking, and the nylon gasket is prone to falling off, resulting in poor stability.
A special-shaped gasket is designed. It uses PA66 material. The diameter of the through hole is smaller than the diameter of the screw shaft. Multiple through slots are arranged around the circumference. The thickness is 1mm. The inner diameter of the through slot is slightly larger than the through hole. It is suitable for rotational or vertical press-in assembly to ensure stability and shock absorption.
It improves the stability and shock absorption of the gasket, avoids the damage of the screw pan head to the PP material, reduces the cost and maintains the locking depth, and is suitable for screw locking of automobile headlights.
Smart Images
Figure CN223459700U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of screws, in particular to a special-shaped gasket. BACKGROUND
[0002] With the rapid development of the automobile industry in recent years, the performance and appearance of the vehicle lamp have become a major selling point in the vehicle, and the automobile manufacturers and consumers pay more and more attention to the vehicle lamp, so it is imperative to improve the appearance quality of the lamp.
[0003] In the prior art, most gaskets are developed in two aspects: 1. developed in terms of fastening and anti-loosening; and 2. shock-absorbing gaskets are mostly used in medical or large-scale equipment.
[0004] The gasket for shock absorption has a complex structure and a thickness greater than 2 mm. A lamp uses more screws, and the high cost of a single gasket affects the overall lamp cost, which is not easy to be accepted by the manufacturers. The commonly used screw length is 10 mm or 14 mm, and the gasket is too thick to affect the locking depth, resulting in low lamp strength. Therefore, it is necessary to use a gasket with low cost and thin thickness.
[0005] In the prior art, most gaskets are used in cooperation with the screw locking on the metal part, without considering the metal screw locking PP material, and the screw head after locking causes the PP material surface to wear and become a foreign matter. In the material library, nylon gaskets can protect the PP material, but the nylon gaskets are easily detached after being shaken slightly after being assembled with the screw, which can easily cause other problems. CONTENT OF THE UTILITY MODEL
[0006] The present application aims to solve one of the problems in the background art.
[0007] Therefore, the present application provides a special-shaped gasket.
[0008] The technical scheme adopted by the present application to solve the technical problem is:
[0009] A special-shaped gasket comprises a gasket body, a through hole and a plurality of through grooves communicated with the outer edge of the through hole are arranged on the gasket body, the through hole is used for penetrating the rod part of the screw, the diameter l of the through hole is smaller than the diameter of the rod part of the screw, the plurality of through grooves are arranged along the circumference of the through hole, and the through hole and the through groove penetrate the gasket body along the axial direction of the gasket body.
[0010] Further, the material of the gasket body is PA66.
[0011] Further, the through grooves are equidistantly arranged four along the circumference of the through hole.
[0012] Further, the thickness of the gasket body is 1 mm.
[0013] Further, the diameter of the through hole l is 0.4-0.6mm smaller than the outer diameter A of the gasket.
[0014] Further, the diameter L of the inscribed circle of the plurality of through grooves near the outer side wall of the gasket body is 1-2mm larger than the diameter l of the through hole.
[0015] Further, the diameter L of the inscribed circle of the plurality of through grooves near the outer side wall of the gasket body is 4.6mm.
[0016] Further, the diameter l of the through hole is 3.3mm.
[0017] The utility model discloses the beneficial effect is, the application passes through the design of through hole and through groove, makes screw can enter in rotation mode also can be vertically pressed into, uses the gasket with screw, can promote the shock attenuation, avoids the damage of screw disc head to PP material surface after the lock of metal screw, through effectively reducing the hole diameter, promotes the stability of gasket after assembly. BRIEF DESCRIPTION OF DRAWINGS
[0018] The utility model is further described below in connection with the drawings and examples.
[0019] Figure 1 It is the schematic diagram of position relation between through hole and through groove in the utility model.
[0020] Figure 2 It is the structural schematic diagram of gasket body in the utility model.
[0021] In the drawing: 1, gasket body, 2, through hole, 3, through groove. DETAILED DESCRIPTION
[0022] The utility model will be further described in detail in connection with the drawings. These drawings are all simplified schematic diagrams, just with the schematic mode to illustrate the basic structure of the utility model, so it just shows the structure related to the utility model.
[0023] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the features limited by "first" and "second" can be explicitly or implicitly included one or more features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.
[0024] In the description of the utility model, it should be explained that, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0025] A special-shaped gasket used with a self-tapping screw, comprising a gasket body 1, the gasket body 1 is provided as a thin round sheet, and the gasket body 1 is made of PA66.
[0026] A through hole 2 is coaxially arranged on the gasket body 1, the through hole 2 is used for penetrating the screw rod part, the diameter l of the through hole 2 is smaller than the diameter of the screw rod part, and a through groove 3 is further arranged on the gasket body 1, the through groove 3 is arranged along the circumference of the through hole 2 and is also arranged at the outer edge of the through hole 2, and the through groove 3 is provided in plurality, in the embodiment, the through groove 3 is provided with four, the inner diameter L of the inscribed circle of the plurality of through grooves 3 close to the outer side wall of the gasket body 1 is 1-2mm larger than l, and preferably, the diameter l of the through hole 2 is 0.4-0.6mm smaller than the outer diameter A of the gasket.
[0027] The current automatic gasket assembling equipment for the through hole 2 has two types, namely, screw-in type and press-in type, the press-in type is easy to damage the gasket during the assembling process, in order to ensure that the gasket does not fall off after assembling while still ensuring the feasibility of assembling, the through groove 3 is arranged at the outer edge of the through hole 2, so as to partially enlarge the through hole 2.
[0028] In order to ensure that the gasket can withstand the use pressure generated by the torque of the screw, the size of the gasket needs to be designed to match the screw type, for example, the screw with a disc head size of 7mm, a tolerance diameter of 4.18mm and a pitch of 1.8mm, the pressure generated by the torque of 1.8N.m, that is, the pressure required to be borne by the gasket below the screw disc head is 2033.5N, and the pressure required to be borne by the gasket below the screw disc head is P1, P1 is 64.72MPa, that is, the pressure that the gasket per square centimeter can bear is about 6474.0N.
[0029] The PA66 material with a thickness of 1mm per square centimeter can bear a pressure of more than 8000N, the outer diameter A of the gasket is in the range of d+1 to d+3, when the disc head diameter is 7mm, the gasket diameter is designed to be 8mm, the thickness of the gasket body 1 is designed to be 1mm, the inner diameter l of the through hole 2 is 3.3mm, and the inner diameter L of the outer edge line is 4.6mm, the gasket can bear the pressure generated by the torque of the screw.
[0030] The present scheme is suitable for metal screw locking PP material, in other embodiments, when the special-shaped gasket is used in a small internal position of a lamp, the outer diameter A of the gasket is designed to be 8mm, which is only 1mm larger than the disc head of the screw, and the gasket can also be used to ensure that the screw can be locked.
[0031] The inner diameter of the through hole 2 is designed to be smaller than the outer tooth diameter of the screw, and the through groove 3 is arranged at the outer edge of the through hole 2, so that the feasibility of various assembly methods can be ensured, and the gasket is not easy to fall off after being assembled on the screw, and the stability of the assembled gasket is improved. The structure design of the gasket can meet the strength requirement of the screw, improve the shock resistance, and avoid damage to the surface of the PP material caused by the disc head of the metal screw after locking. Based on the above ideal embodiments of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and the technical scope must be determined by the scope of claims.
Claims
1. A profiled gasket, characterized in that, The gasket body (1) is provided with a through hole (2) and a plurality of through grooves (3) communicated with the outer edge of the through hole (2), the through hole (2) is used for penetrating the rod part of a screw, the diameter l of the through hole (2) is smaller than the diameter of the rod part of the screw, the plurality of through grooves (3) are arranged along the circumference of the through hole (2), and the through hole (2) and the through groove (3) all penetrate the gasket body (1) along the axial direction of the gasket body (1).
2. The profiled gasket of claim 1, wherein, The material of the gasket body (1) is PA66.
3. The profiled gasket of claim 1, wherein, The four through grooves (3) are equidistantly arranged along the circumference of the through hole (2).
4. The profiled gasket of claim 1, wherein, The thickness of the gasket body (1) is 1 mm.
5. The profiled gasket of claim 1, wherein, The diameter l of the through hole (2) is 0.4-0.6 mm smaller than the outer diameter A of the gasket.
6. The profiled gasket of claim 1, wherein, The inner diameter L of the inscribed circle of the plurality of through grooves (3) close to the outer side wall of the gasket body (1) is 1-2 mm larger than the diameter l of the through hole (2).
7. The profiled gasket of claim 1, wherein, The inner diameter L of the inscribed circle of the plurality of through grooves (3) close to the outer side wall of the gasket body (1) is 4.6 mm.
8. The profiled gasket of claim 1, wherein, The inner diameter l of the through hole (2) is 3.3 mm.