Noise-reduction and low-cost comprehensive air spring dust cover

Abstract

The utility model relates to the technical field of dust covers, and discloses a noise-reducing and low-cost comprehensive air spring dust cover which comprises a dust cover body, a plurality of ribs are arranged in the dust cover body, and a first extension ring and a second extension ring which are integrally formed are arranged at the two ends of the dust cover body respectively. A second fastening assembly and a first fastening assembly are arranged on the outer side of the first extension ring and the outer side of the second extension ring correspondingly for fastening. According to the utility model, through the injection structure consisting of the annular runner, the buffer cavity and the vertical runner, the rubber material is uniformly injected and fed from the parting part at the tail end of the dust cover cavity, so that the rubber material is efficiently filled and uniformly distributed, the rubber injection period is shortened, the material waste is reduced, the production cost is obviously reduced, in addition, the trimming efficiency of products is also improved, and the product quality is improved. And the product surface is optimized.

Description

Technical Field

[0001] This utility model relates to the field of dust cover technology, and in particular to a noise-reducing, low-cost integrated air spring dust cover. Background Technology

[0002] As a key sealing component in the vehicle suspension system, the air spring dust cover's core function is to isolate external contaminants and protect the internal structure of the air spring.

[0003] Currently, most air spring dust covers use side-aperture for glue injection. However, this method results in long flow paths, wasting glue and reducing glue utilization. Furthermore, the shear force at the injection point where the side inlet contacts the product surface is high, leading to a protrusion at the injection point and requiring a trimming process. Improper trimming can result in glue residue or gaps at the injection point, reducing product quality and even causing defective products. Additionally, dust covers undergo stretching and compression during use, and the corrugated surface of the dust cover adheres during compression and stretching, generating abnormal noise. Therefore, we propose a noise-reducing, low-cost integrated air spring dust cover. Utility Model Content

[0004] The present invention aims to solve the technical problems existing in the prior art and provide a noise-reducing, low-cost integrated air spring dust cover.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a noise-reducing, low-cost integrated air spring dust cover, comprising a dust cover body, wherein multiple ribs are provided inside the dust cover body, and an integrally formed first extension ring and a second extension ring are respectively provided at both ends of the dust cover body. A second fastening component and a first fastening component are respectively provided on the outer side of the first extension ring and the second extension ring for fastening. An injection structure is provided at the end of the dust cover body, and the dust cover body is injection molded by the injection structure. The injection structure includes an annular flow channel, a buffer cavity is fixedly connected to the annular flow channel, and a vertical flow channel is fixedly connected to the upper outer wall of the buffer cavity. The vertical flow channel, the buffer cavity and the annular flow channel are internally connected.

[0006] Preferably, the dust cover body has an inner mold inside and an outer mold body outside, forming a mold cavity between the outer mold body and the inner mold, and the injection structure is located at the end of the mold cavity.

[0007] Preferably, the second fastening assembly includes two second fastening rings, each with a second fixing lug fixedly installed at both ends. A second bolt is movably connected to the second fixing lug at both ends of one of the second fastening rings, and a second nut is threaded to the end of the second bolt. The ends of the two second fastening rings are fixedly connected to the second nut via the second bolt.

[0008] Preferably, the first fastening assembly includes two first fastening rings, each of which has a first fixing lug fixedly installed at its end. A first bolt is movably connected to the first fixing lug at both ends of one of the first fastening rings, and a first nut is threadedly connected to the end of the first bolt. The ends of the two first fastening rings are fixedly connected by the first bolt and the first nut.

[0009] Preferably, the outer wall of the second extension ring is provided with a groove, and a pressure block matching the groove is fixedly installed inside the first fastening ring, and the pressure block is elastically set.

[0010] Preferably, a positioning strip is fixedly installed on the outer wall of the first extension ring, and a positioning groove matching the positioning strip is provided through the second fastening ring.

[0011] Preferably, a tensioning spring is snapped into the inside of the first extension ring, and a sealing lip is fixedly connected to the inner wall of the first extension ring on the inner side of the tensioning spring. Beneficial effects

[0012] This utility model provides a noise-reducing, low-cost integrated air spring dust cover. It has the following beneficial effects:

[0013] (1) This noise-reducing, low-cost integrated air spring dust cover uses an injection structure consisting of an annular flow channel, a buffer cavity, and a vertical flow channel to uniformly inject the adhesive from the parting point at the end of the dust cover cavity, achieving efficient filling and uniform distribution of the adhesive. Specifically, the vertical flow channel adopts a frustum-shaped design that is wider at the top and narrower at the bottom. Combined with a buffer cavity with a 45° inclined section, it can guide the adhesive to diffuse in layers during the injection process and buffer the flow rate, avoiding air entrapment or local lack of adhesive caused by turbulence. After the adhesive enters the annular flow channel uniformly through the buffer cavity, it fills the mold cavity with stable pressure, ensuring that the adhesive layer thickness is consistent and there are no weak areas after the dust cover body is formed. This improves the reliability of the sealing performance, shortens the injection cycle and reduces material waste, significantly reducing production costs. In addition, it also improves the trimming efficiency of the product and optimizes the product surface.

[0014] (2) The noise-reducing, low-cost integrated air spring dust cover has a unique design in which a set of V-shaped ribs are added every 60° and arranged in a staggered manner at 30°. When the dust cover is compressed or stretched, the staggered distribution of the V-shaped ribs makes the adjacent corrugated surfaces form asymmetrical contact, which greatly reduces the contact area and avoids the friction noise caused by the complete contact of the corrugated surfaces in traditional dust covers. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a structurally disassembled schematic diagram of the first fastening component and the second fastening component of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the dust cover body structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the outer mold body and inner mold structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the tensioning spring structure of this utility model;

[0022] Figure 6 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0023] Legend: 1. Dust cover body; 2. Rib; 3. First fastening assembly; 31. First fastening ring; 32. Pressure block; 33. First fixing ear; 34. First bolt; 35. First nut; 4. Second fastening assembly; 41. Second fastening ring; 42. Positioning groove; 43. Second fixing ear; 44. Second bolt; 45. Second nut; 5. First extension ring; 6. Positioning strip; 7. Tensioning spring; 8. Sealing lip; 9. Annular flow channel; 10. Buffer cavity; 11. Vertical flow channel; 12. Outer mold body; 13. Inner mold; 14. Second extension ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-6 As shown, a noise-reducing, low-cost integrated air spring dust cover includes a dust cover body 1. Multiple ribs 2 are arranged inside the dust cover body 1. A first extension ring 5 and a second extension ring 14, integrally formed, are respectively provided at both ends of the dust cover body 1. A second fastening component 4 and a first fastening component 3 are respectively provided on the outer sides of the first extension ring 5 and the second extension ring 14 for fastening. An injection structure is provided at the end of the dust cover body 1. The dust cover body 1 is injection molded through the injection structure, which includes an annular flow channel 9. A buffer cavity 10 is fixedly connected to the annular flow channel 9. A vertical flow channel 11 is fixedly connected to the upper outer wall of the buffer cavity 10. The vertical flow channel 11, the buffer cavity 10 and the annular flow channel 9 are connected internally. In use, the adhesive enters the buffer cavity 10 and the annular flow channel 9 through the vertical flow channel 11, and then the dust cover body 1 is injected and molded. The ribs 2 inside the dust cover body 1 are increased by a set of V-shaped ribs every 60 degrees and staggered by 30 degrees, so that the dust cover will not cause abnormal noise due to surface-to-surface contact in the assembly environment.

[0026] like Figure 4 As shown, the dust cover body 1 has an inner mold 13 inside and an outer mold body 12 outside. A mold cavity is formed between the outer mold body 12 and the inner mold 13. An injection structure is located at the end of the mold cavity. The adhesive is injected into the mold cavity formed between the outer mold body 12 and the inner mold 13 through the injection structure, and the dust cover body 1 can be formed inside the mold cavity.

[0027] like Figure 2 As shown, the second fastening assembly 4 includes two second fastening rings 41. Both ends of the two second fastening rings 41 are fixedly installed with second fixing ears 43. A second bolt 44 is movably connected to the second fixing ears 43 at both ends of one of the second fastening rings 41. A second nut 45 is threaded to the end of the second bolt 44. The ends of the two second fastening rings 41 are fixedly connected to the second nut 45 through the second bolt 44. Both second fastening rings 41 are semi-circular structures. The two second fastening rings 41 are combined to form a ring to tighten the first extension ring 5.

[0028] like Figure 2As shown, the first fastening assembly 3 includes two first fastening rings 31. The ends of the two first fastening rings 31 are fixedly installed with first fixing ears 33. A first bolt 34 is movably connected to the first fixing ears 33 at both ends of one of the first fastening rings 31. The end of the first bolt 34 is threadedly connected to a first nut 35. The ends of the two first fastening rings 31 are fixedly connected by the first bolt 34 and the first nut 35. Both first fastening rings 31 are semi-circular structures. The two first fastening rings 31 are combined to form a ring to tighten the second extension ring 14.

[0029] like Figure 3 As shown, the outer wall of the second extension ring 14 is provided with a groove, and the inside of the first fastening ring 31 is fixedly installed with a pressure block 32 that matches the groove, and the pressure block 32 is elastically set; when the elastically set pressure block 32 is squeezed, it is flattened, which can further expand the contact area between the pressure block 32 and the groove on the outer wall of the second extension ring 14.

[0030] like Figure 6 As shown, a positioning strip 6 is fixedly installed on the outer wall of the first extension ring 5, and a positioning groove 42 matching the positioning strip 6 is provided through the second fastening ring 41. The positioning strip 6 is placed into the positioning groove 42, which can quickly position the two second fastening rings 41, making it convenient for the user to quickly fasten the first extension ring 5 through the two second fastening rings 41.

[0031] like Figure 6 As shown, a tensioning spring 7 is snapped into the inside of the first extension ring 5, and a sealing lip 8 is fixedly connected to the inner wall of the first extension ring 5 inside the tensioning spring 7; the tensioning spring 7 can squeeze the sealing lip 8 to the corresponding connection point on the shock absorber, and pre-fix the connection point between the first extension ring 5 and the shock absorber.

[0032] The working principle of this utility model is as follows: During use, the dust cover body 1 can be injection molded through the mold cavity formed between the outer mold body 12 and the inner mold 13. The injection structure located at the end of the mold cavity consists of an annular flow channel 9, a buffer cavity 10, and a vertical flow channel 11. The vertical flow channel 11 is a frustum-shaped structure that is wider at the top and narrower at the bottom. The buffer cavity 10 located at the lower end of the vertical flow channel 11 has an inclined cross-section with an inclination angle of 45 degrees. After the glue enters the interior of the buffer cavity 10 through the vertical flow channel 11, it fills the interior of the annular flow channel 9 and is then injected into the mold cavity to form the dust cover body 1. The inner surface of the dust cover body 1 has six areas with semi-cylindrical ribs 2, which can leave gaps on the corrugated surface when the dust cover is stretched and compressed, reducing the contact area and thus reducing foreign matter. The sound is generated by the first fastening component 3 and the second fastening component 4 located on the outer side of the first extension ring 5 and the second extension ring 14 at both ends of the dust cover body 1. These components can fasten the connection when the dust cover body 1 is connected to the shock absorber and the air spring sleeve. The first extension ring 5 has an elastic tensioning spring 7 inside, and a sealing lip 8 is provided on the inner side of the tensioning spring 7. The tensioning spring 7 squeezes the sealing lip 8 to the corresponding connection on the shock absorber, which can pre-fix the connection between the first extension ring 5 and the shock absorber. Then, the combination of the two semi-circular first fastening rings 31 and the second fastening ring 41 in the first fastening component 3 and the second fastening component 4 can further fasten the first extension ring 5 and the second extension ring 14 at both ends of the dust cover body 1.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A noise-reducing, low-cost integrated air spring dust cover, comprising a dust cover body (1), characterized in that: The dust cover body (1) has multiple ribs (2) inside. The dust cover body (1) has an integrally formed first extension ring (5) and second extension ring (14) at both ends. The outer sides of the first extension ring (5) and the second extension ring (14) are respectively provided with a second fastening component (4) and a first fastening component (3) for fastening. The end of the dust cover body (1) is provided with an injection structure. The dust cover body (1) is injection molded by the injection structure. The injection structure includes an annular flow channel (9). A buffer cavity (10) is fixedly connected to the annular flow channel (9). A vertical flow channel (11) is fixedly connected to the upper outer wall of the buffer cavity (10). The vertical flow channel (11), the buffer cavity (10) and the annular flow channel (9) are connected internally.

2. The noise-reducing, low-cost integrated air spring dust cover according to claim 1, characterized in that: The dust cover body (1) has an inner mold (13) inside and an outer mold body (12) outside. A mold cavity is formed between the outer mold body (12) and the inner mold (13), and the injection structure is located at the end of the mold cavity.

3. The noise-reducing, low-cost integrated air spring dust cover according to claim 2, characterized in that: The second fastening assembly (4) includes two second fastening rings (41), and two second fixing ears (43) are fixedly installed at both ends of the two second fastening rings (41). A second bolt (44) is movably connected to the second fixing ears (43) at both ends of one of the second fastening rings (41). A second nut (45) is threadedly connected to the end of the second bolt (44). The ends of the two second fastening rings (41) are fixedly connected to the second nut (45) through the second bolt (44).

4. The noise-reducing, low-cost integrated air spring dust cover according to claim 3, characterized in that: The first fastening assembly (3) includes two first fastening rings (31), and each of the two first fastening rings (31) has a first fixing ear (33) fixedly installed at its end. A first bolt (34) is movably connected to the first fixing ear (33) at both ends of one of the first fastening rings (31). A first nut (35) is threadedly connected to the end of the first bolt (34). The ends of the two first fastening rings (31) are fixedly connected by the first bolt (34) and the first nut (35).

5. The noise-reducing, low-cost integrated air spring dust cover according to claim 4, characterized in that: The outer wall of the second extension ring (14) is provided with a groove, and the first fastening ring (31) is fixedly installed with a pressure block (32) that matches the groove, and the pressure block (32) is elastically set.

6. The noise-reducing, low-cost integrated air spring dust cover according to claim 5, characterized in that: The outer wall of the first extension ring (5) is fixedly installed with a positioning strip (6), and the second fastening ring (41) is provided with a positioning groove (42) that matches the positioning strip (6).

7. The noise-reducing, low-cost integrated air spring dust cover according to claim 6, characterized in that: The first extension ring (5) is internally fitted with a tensioning spring (7), and the inner wall of the first extension ring (5) is fixedly connected to the inner side of the tensioning spring (7) with a sealing lip (8).

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