Low-noise high-density plastic gear

Abstract

The utility model relates to the field of plastic gears, and discloses a low-noise high-density plastic gear which comprises a gear body, and the gear body comprises a base layer, a first layer, a second layer, a third layer and a fourth layer, the filling layer is added into the base layer and comprises glass fibers, carbon fibers or graphite; the lubricating layer is added between the filling layer and the base layer and can be polytetrafluoroethylene or polyvinyl alcohol; and surface treatment: polishing, coating or plating the surface of the gear. Polyimide or polyether-ether-ketone is adopted as the base layer of the gear, so that the overall density of the gear is improved; in addition, by adding the filling layer, the wear resistance and strength of the plastic gear can be improved, and noise is reduced. In addition, friction and noise between the gears can be reduced due to the existence of the lubricating layer; and finally, the surface treatment layer is subjected to polishing, coating or plating and other methods, the surface roughness can be reduced, the flatness and smoothness of the gear are improved, and therefore noise is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of plastic gears, in particular to a low-noise and high-density plastic gear. Background Art

[0002] Plastic gears are gears made of plastic materials. They are usually used in low-load, low-speed and low-noise applications, such as household appliances, toys and small mechanical equipment. Compared with metal gears, plastic gears have the advantages of light weight, low cost, no need for lubrication and good shock absorption performance.

[0003] However, plastic gears have poor wear resistance and high temperature resistance, so they may not be suitable for high-load and high-speed applications. In addition, the plastic material used in plastic gears generally has a low density, which makes them not only non-wear-resistant but also easy to damage; at the same time, such plastic gears are also noisy when used. Utility Model Content

[0004] Technical problems to be solved: How to increase the density of plastic gears and how to reduce the noise of plastic gears.

[0005] Technical solution: The utility model provides a low-noise and high-density plastic gear, including a gear, which includes: a base layer: polyimide or polyetheretherketone is used as the base layer of the gear; a filling layer: added in the base layer, which includes glass fiber, carbon fiber or graphite; a lubricating layer: added between the filling layer and the base layer, the lubricating layer uses a material with a low friction coefficient, and the material with a low friction coefficient can be polytetrafluoroethylene or polyvinyl alcohol; a surface treatment layer: polishing, coating or plating is performed on the surface of the gear to reduce surface roughness and improve the flatness and smoothness of the gear.

[0006] Technical effect: In the utility model, polyimide or polyetheretherketone is used as the base layer of the gear, so that the overall density of the gear is improved; in addition, the addition of the filling layer can improve the wear resistance and strength of the plastic gear and reduce noise; not only that, the presence of the lubricating layer can reduce the friction and noise between the gears; finally, through the surface treatment layer using polishing, coating or plating methods, the surface roughness can be reduced, the flatness and smoothness of the gear can be improved, thereby reducing the generation of noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0008] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0009] Figure 2 It is a schematic diagram of the hierarchical structure of the utility model;

[0010] In the figure: 1, gear; 101, base layer; 102, lubricating layer; 103, filling layer; 104, surface treatment layer. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0012] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0013] The low-noise and high-density plastic gear provided in this embodiment is Figure 1 and Figure 2 As shown, gear 1 includes:

[0014] Base layer 101: Choose a high-density base material as the main body of the plastic gear, such as high-performance engineering plastics such as polyimide (PI) or polyetheretherketone (PEEK). These materials have high density and excellent mechanical properties, making them suitable for high-density plastic gears. Both polyimide and polyetheretherketone have excellent wear resistance, high temperature tolerance and chemical stability, and can operate stably for a long time in harsh environments. They also have a low coefficient of friction and good mechanical rigidity, allowing plastic gears to withstand high-speed and high-load working conditions. In addition, polyimide or polyetheretherketone can be replaced by polyetheramide, polyamideimide, polyetherketoneketone or polyphenylene sulfide. Polyetheramide (PEI) is an engineering plastic with high-temperature stability and chemical resistance that can replace polyimide. It has good stiffness, strength and wear resistance, and is suitable for applications in high-load and high-temperature environments. Polyamideimide (PAI) has properties similar to polyimide. It has excellent heat resistance, chemical resistance and mechanical properties, and is suitable for applications in high-temperature, high-pressure and corrosive environments. Polyetherketoneketone (PEKK) has similar properties to polyetheretherketone. It has high thermal stability, chemical resistance and wear resistance, and is suitable for applications in high temperature, high load and chemically corrosive environments. Polyphenylene sulfide (PPS) has good thermal stability, chemical resistance and mechanical properties. It is suitable for applications in high temperature and corrosive environments and can replace polyimide and polyetheretherketone.

[0015] Filling layer 103: Fillers are added to the base material to increase the density and hardness of the plastic gear. Common fillers include glass fiber, carbon fiber or graphite. Glass fiber filling can improve the strength and stiffness of the plastic gear and increase its wear resistance and impact resistance. Carbon fiber filling can provide higher strength and stiffness while reducing the weight of the gear. Graphite filling can improve the self-lubricating properties of the plastic gear and reduce friction and wear. In addition, glass fiber, carbon fiber or graphite can be replaced by cellulose fiber, ceramic particles or nanoparticles. Common fiber materials include glass fiber, carbon fiber, aramid fiber, etc., while the plastic matrix can select polyamide, polyimide, polyetheretherketone, etc. Cellulose fiber is a natural fiber, such as wood fiber, flax fiber, hemp fiber, etc. These fibers have high strength and stiffness and can be used as a substitute for the filling layer material. Cellulose fiber has excellent performance in some specific applications. Among ceramic particles, common ceramic materials include aluminum oxide, silicon nitride, silicon carbide, etc. These materials have high hardness, high wear resistance and high temperature resistance, which can enhance the mechanical properties of composite materials and provide additional wear and corrosion resistance. Nanoparticles are fine particles with nanometer size, such as nano-silicon dioxide, nano-alumina, etc. The addition of nanoparticles can improve the reinforcement effect and performance of the filling layer. Nanoparticles have a large specific surface area and high strength, which can increase the interfacial bonding between the plastic matrix and the filling layer and improve the mechanical properties and wear resistance of the composite material.

[0016] Lubricating layer 102: A special lubricating layer 102 is added between the filling layer 103 and the base layer 101 to reduce friction and noise between gears. Common lubricating layer materials include polytetrafluoroethylene (PTFE) and polyvinyl alcohol (PVA). PTFE is a low friction coefficient material with good chemical resistance and thermal stability, which can effectively reduce the friction coefficient and provide good lubrication effect. PVA has high viscosity and lubrication properties, which can provide longer-lasting lubrication effect and extend the service life of the gear. The shape of gear 1 adopts an involute form.

[0017] Surface treatment layer 104: In order to further reduce noise, special treatment can be performed on the surface of the plastic gear. For example, polishing, coating or plating can reduce surface roughness, improve the flatness and smoothness of the gear, and thus reduce noise. Polishing can remove tiny depressions and particles on the surface and improve the surface quality of the gear. Coating can form a protective film on the surface, providing additional lubrication and noise reduction effects. Plating can increase the hardness and wear resistance of the gear surface, and improve its service life and durability.

[0018] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low-noise, high-density plastic gear, comprising a gear (1), characterized in that: The gear (1) comprises: Base layer (101): polyimide or polyetheretherketone is used as the base layer (101) of the gear (1); Filling layer (103): added to the base layer (101), comprising glass fiber, carbon fiber or graphite; Lubricating layer (102): added between the filling layer (103) and the base layer (101), the lubricating layer (102) uses a material with a low friction coefficient, and the material with a low friction coefficient is polytetrafluoroethylene or polyvinyl alcohol; Surface treatment layer (104): polishing, coating or plating is performed on the surface of the gear (1) to reduce surface roughness and improve the flatness and smoothness of the gear.

2. The low-noise, high-density plastic gear according to claim 1, characterized in that: The outer shape of the gear (1) can be in the form of an involute.

3. The low-noise, high-density plastic gear according to claim 1, characterized in that: The polyimide or polyetheretherketone in the base layer (101) can be replaced by polyetheramide, polyamideimide, polyetherketoneketone or polyphenylene sulfide.

4. The low-noise, high-density plastic gear according to claim 1, characterized in that: The glass fibers, carbon fibers or graphite in the filling layer (103) may be replaced by cellulose fibers, ceramic particles or nanoparticles.

5. The low-noise, high-density plastic gear according to claim 4, characterized in that: Cellulosic fibers are wood fibers, flax fibers or hemp fibers.

6. The low-noise, high-density plastic gear according to claim 4, characterized in that: The ceramic particles are aluminum oxide, silicon nitride or silicon carbide.

7. The low-noise, high-density plastic gear according to claim 4, characterized in that: The nanoparticles are nano-silicon dioxide or nano-aluminum oxide.

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