Tear-resistant ethylene propylene diene monomer lining

Abstract

The utility model discloses a tear-resistant ethylene propylene diene monomer rubber bushing, which relates to the technical field of rubber parts and comprises a bushing mixture, annular reinforcing raised lines and vertical reinforcing raised lines are fixed on the outer end face of the bushing mixture, and the annular reinforcing raised lines and the vertical reinforcing raised lines are crossed and fixed to form a reinforcing net. The tear resistance of the bushing mixture is improved, and the external load is dispersed; the inner and outer edges of the upper and lower ends of the bushing mixture are provided with fillet surfaces; the tear-resistant ethylene propylene diene monomer lining is provided; the annular reinforcing protruding strips and the vertical reinforcing protruding strips are arranged on the end face of the outer side of the bushing mixture, the tear resistance of the bushing is remarkably improved, the fillet faces are arranged on the inner edge and the outer edge of the upper end and the lower end of the bushing mixture, the stress concentration coefficient is remarkably reduced, the overall tear resistance of the bushing is further improved, and the service life of the bushing is further prolonged. The bushing is reasonable in structural design, is suitable for high-load, high-frequency vibration and complex working conditions, can be widely applied to the fields of automobiles, machinery and the like, and has remarkable economic benefits and market prospects.

Description

TECHNICAL FIELD

[0001] The utility model relates to rubber part technical field, concretely is a kind of anti-tearing three-element ethylene propylene rubber bushing. BACKGROUND

[0002] As an important elastic element, rubber bushing is widely used in automobile, machinery, building and other fields, mainly for shock absorption, buffering, sound insulation and connection functions. In actual use, rubber bushing often needs to bear complex load conditions, including tension, compression, shear and torsion and other stress effects.

[0003] Traditional rubber bushing is mostly made of single material, and its anti-tearing performance and weather resistance are limited. Although the mechanical properties can be improved to some extent by increasing the thickness of rubber or adjusting the formula, this method often leads to increased cost, and it is difficult to balance the anti-tearing performance and other properties, further reducing its service life. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides an anti-tearing three-element ethylene propylene rubber bushing, which solves the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: an anti-tearing three-element ethylene propylene rubber bushing, comprising a bushing mixture, an annular reinforcing ridge and a vertical reinforcing ridge are fixed on the outer side end face of the bushing mixture, the annular reinforcing ridge and the vertical reinforcing ridge are fixed to form a reinforcing net by intersecting, so as to improve the anti-tearing performance of the bushing mixture and disperse external load; a fillet surface is provided on the inner and outer edges of the upper and lower ends of the bushing mixture, so as to reduce the stress concentration coefficient and further improve the anti-tearing performance.

[0006] Further, the annular reinforcing ridge is embedded with an annular reinforcing rib, the vertical reinforcing ridge is embedded with a vertical reinforcing rib, the annular reinforcing rib and the vertical reinforcing rib form a mesh reinforcing structure, and the annular reinforcing rib and the vertical reinforcing rib are made of nylon wire or metal framework.

[0007] Further, the bushing mixture is composed of an outer layer and an inner layer, the outer layer is preferably high-weather-resistant EPDM rubber, and the inner layer is high-tearing rubber, preferably NR or HNBR.

[0008] Further, the inner part of the outer layer is provided with a carbon black layer to prevent surface embrittlement caused by aging and avoid surface tearing cracks.

[0009] Further, the radius of the fillet surface is in the range of 0.5mm to 3mm, so as to optimize stress distribution and further improve anti-tearing performance.

[0010] The utility model provides a kind of tear-resistant three-element ethylene-propylene rubber bushing.Compared with prior art, the following beneficial effects are achieved.

[0011] The tear-resistant three-element ethylene-propylene rubber bushing is provided with annular reinforcing ribs and vertical reinforcing ribs on the outer side end face of the bushing mixture, significantly improving the tear resistance of the bushing. The upper and lower ends of the bushing mixture are provided with rounded surfaces on the inner and outer edges, significantly reducing the stress concentration coefficient and further enhancing the overall tear resistance and service life of the bushing. The bushing has a reasonable structure and is suitable for high load, high frequency vibration and complex working conditions. It can be widely used in the fields of automobiles and machinery, and has significant economic benefits and market prospects. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The utility model is a whole structure schematic view.

[0013] Figure 2 The utility model is a bushing mixture structure schematic view.

[0014] Figure 3 The utility model is an annular reinforcing rib and vertical reinforcing rib structure schematic view.

[0015] Figure 4 The utility model is Figure 2 The utility model is a structure schematic view of A in the middle.

[0016] In the figure: 1, bushing mixture; 2, rounded surface; 3, vertical reinforcing rib; 4, annular reinforcing rib; 5, annular reinforcing rib; 6, vertical reinforcing rib; 7, outer layer; 8, inner layer. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0018] Please refer to Figures 1-4The utility model provides a technical scheme: a kind of anti-tearing three-element ethylene propylene rubber bushing, specifically is through annular reinforcing bead 4 and vertical reinforcing bead 3 fixed in the outside end surface of bushing mixture 1, it is formed by annular reinforcing bead 4 and vertical reinforcing bead 3 cross fixation to strengthen net, improve the anti-tearing performance of bushing mixture 1, dispersion external load, there is fillet 2 in the inside and outside edge of the upper and lower end of bushing mixture 1, by fillet 2 can reduce stress concentration coefficient, further improved the overall anti-tearing performance of bushing mixture 1, the edge of fillet 2 is designed as circular arc transition (3mm=R angle=0.5mm), reduce stress concentration coefficient.

[0019] Ring-shaped reinforcing rib 5 is embedded in the inside of annular reinforcing bead 4, vertical reinforcing rib 6 is embedded in the inside of vertical reinforcing bead 3, and the net-shaped reinforcing structure is formed by ring-shaped reinforcing rib 5 and vertical reinforcing rib 6, and the net-shaped reinforcing structure is formed by ring-shaped reinforcing rib 5 and vertical reinforcing rib 6.

[0020] Bushing mixture 1 is specifically composed of outer layer 7 and inner layer 8, wherein the outer layer 7 is preferably high-weather-resistant EPDM, and the inner layer 8 is preferably high-tearing rubber, such as NR or HNBR, so that the bushing mixture 1 formed by mixing can consider both anti-tearing performance and reduce actual use cost when used.

[0021] Carbon black is added in the inside of outer layer 7, which can prevent surface embrittlement caused by aging, thereby effectively avoiding the appearance of tearing cracks on the surface. Not only does it have anti-ultraviolet treatment, but also anti-chemical passivation treatment. Fluorination treatment on the surface of the outer layer 7 can reduce the impact of swelling on the tearing performance.

Claims

1. A tear resistant ethylene propylene diene rubber bushing characterized by, The application relates to a bushing mixture (1), the outer end surface of which is fixed with annular reinforcing ribs (4) and vertical reinforcing ribs (3), the annular reinforcing ribs (4) and the vertical reinforcing ribs (3) are fixed in a cross shape to form a reinforcing net, so as to improve the anti-tearing performance of the bushing mixture (1) and disperse external load; and the upper and lower inner and outer edges of the bushing mixture (1) are provided with round corner faces (2).

2. The tear resistant EPDM bushing of claim 1, wherein, The annular reinforcing ribs (4) are internally embedded with annular reinforcing ribs (5), the vertical reinforcing ribs (3) are internally embedded with vertical reinforcing ribs (6), and the annular reinforcing ribs (5) and the vertical reinforcing ribs (6) form a net-shaped reinforcing structure.

3. The tear resistant EPDM bushing of claim 2, wherein, The bushing mixture (1) comprises an outer layer (7) and an inner layer (8).

4. The tear resistant EPDM bushing of claim 3, wherein, The inner part of the outer layer (7) is provided with a carbon black layer, so as to prevent surface embrittlement caused by aging and avoid surface tearing cracks.

5. The tear resistant EPDM bushing of claim 2, wherein, The radius of the round corner face (2) ranges from 0.5 mm to 3 mm.

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