Elastic and reduced split type air spring lower end cover structure

Abstract

The utility model provides an elastic reduction split type air spring lower end cover structure, relates to the technical field of air springs, and aims to solve the technical problem that in the prior art, the service life is affected due to abnormal sound and abrasion generated by contact between a lower end cover and the boundary of a frame. An elastic reduction split type air spring lower end cover structure comprises an end cover body and a rubber pad, a round hole is formed in the bottom end of the end cover body, the round hole and the end cover body are coaxially arranged, the inner diameter of the round hole is gradually reduced from bottom to top, the rubber pad comprises an annular plane part and an annular circular truncated cone part which are coaxially arranged, and the circular truncated cone part is integrally formed in an inner hole of the plane part. The rubber pad is vulcanized at the bottom end of the end cover body, the plane part is attached to the bottom end of the end cover body, and the circular truncated cone part is attached to the inner wall of the circular hole; in the using process of the end cover body, the bottom end of the end cover body and the inner wall of the round hole in the bottom end can make contact with the boundary of a frame, so that a layer of rubber pad is vulcanized at the bottom end of the end cover body, the rubber pad makes contact with the boundary of the frame, abnormal sound is avoided, abrasion of the lower end cover is reduced, and the service life of the lower end cover is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to a spring-reducing split air spring lower end cover structure. Background Art

[0002] Passenger car air suspension systems replace traditional coil springs with air springs, achieving adjustable vehicle height, consistent suspension frequency deviation under varying loads, and absorbing and filtering high-frequency road shock, thereby improving vehicle ride comfort and handling stability. The core component of an air spring is the airbag, a composite of rubber and cord layers. This airbag ensures the air spring's airtightness, pressure-bearing properties, and travel capacity. Because an air spring operates as a closed system, internal pressure increases or decreases as it compresses or stretches.

[0003] There are many types of lower end covers for rear suspension air springs with a split spring-reducing arrangement. According to different uses and design requirements, they can be divided into various types, such as iron lower end covers, alloy lower end covers, and plastic lower end covers.

[0004] The lower end cover is in contact with the edge of the frame. There is a risk of friction, abnormal noise and wear during vehicle use, and the service life of the parts is relatively short. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a spring-reducing split air spring lower end cover structure to solve the technical problem in the existing technology that the lower end cover contacts the boundary of the frame, produces abnormal noise and wear, and affects the service life.

[0006] In order to solve the above technical problems, the utility model provides a lower end cover structure of a spring-reducing split air spring, including an end cover body and a rubber pad. A circular hole is provided at the bottom end of the end cover body and the circular hole is coaxially arranged with the end cover body. The inner diameter of the circular hole gradually decreases from bottom to top. The rubber pad includes a coaxially arranged and annular flat portion and a frustum portion. The frustum portion is integrally formed at the inner hole of the flat portion. The rubber pad is vulcanized at the bottom end of the end cover body and the flat portion fits the bottom end of the end cover body, and the frustum portion fits the inner wall of the circular hole.

[0007] After adopting the above structure, the utility model has the following advantages in the lower end cover structure of the elastic-reducing split air spring: during the use of the end cover body, the bottom end and the inner wall of the circular hole at the bottom end will contact the boundary of the frame, so a layer of rubber pad is vulcanized at the bottom end of the end cover body, and the flat part of the rubber pad fits the bottom end of the end cover body, and the frustum part of the rubber pad fits the inner wall of the circular hole. During the use of the lower end cover, the rubber pad contacts the boundary of the frame, thereby avoiding abnormal noise, reducing the wear of the lower end cover, and extending the service life of the lower end cover.

[0008] As an improvement, the end cover body includes a base, a bottom plate, a first protrusion, a plurality of first ribs and a plurality of second ribs, the first protrusion is arranged at the bottom end of the base and is coaxially arranged with the base, the circular hole is arranged at the bottom end of the first protrusion and extends into the base, a plurality of first ribs are equidistantly arranged at the bottom end of the base along the circumferential direction of the outer peripheral wall of the first protrusion and are connected to the first protrusion, a plurality of second ribs are equidistantly arranged at the bottom end of the base along the circumferential direction of the outer peripheral wall of the first protrusion and are connected to the first protrusion, the bottom plate is annular with a notch, the bottom plate is arranged on the outer peripheral wall of the first protrusion and the upper end of the bottom plate is connected to all the first ribs The bottom of the base plate is flush with the bottom of the first protrusion, the flat portion fits the bottom of the base plate and the bottom of the first protrusion, and the rubber pad also includes a vertical portion, which fits the outer peripheral wall of the first protrusion exposed from the notch and the side wall of the first rib. With this structure, the flat portion fits the bottom end of the end cover body composed of the bottom end of the base plate and the bottom end of the first protrusion, and a vertical portion is additionally provided to fit a portion of the outer peripheral wall of the first protrusion and the side wall of the first rib, thereby further avoiding abnormal noise and wear of the lower end cover and extending the service life of the lower end cover.

[0009] As an improvement, the end cover body also includes an annular second protrusion, which is arranged on the upper end surface of the base and coaxially with the base. An annular metal insert is embedded in the second protrusion, and a plurality of through grooves are provided on the inner wall of the second protrusion at equal intervals along the circumference so that the metal insert is exposed from the through groove. With this structure, the structural strength of the second protrusion and even the entire lower end cover is improved by arranging the metal insert, thereby extending the service life of the lower end cover.

[0010] As an improvement, a plurality of third ribs are provided between the inner wall of the second protrusion and the upper end surface of the base, and the plurality of third ribs are equidistantly arranged along the circumference of the second protrusion; with this structure, the third ribs are provided to fix the bag skin.

[0011] As an improvement, the upper end surface of the base is provided with a plurality of convex strips arranged along the circumferential direction of the outer peripheral wall of the second protrusion, and each convex strip is connected to the outer peripheral wall of the second protrusion; with this structure, the convex strips are provided for connection with the buckling ring.

[0012] As an improvement, the base is provided with a plurality of air holes that pass through the base; with this structure, the air holes are provided so that the cavity can be connected when the air spring is stretched or compressed, ensuring the normal stretching and compression of the air spring.

[0013] As an improvement, the thickness of the flat part is 2 mm and the thickness of the truncated cone part is 0.6 mm.

[0014] As an improvement, the outer diameter of the planar portion is smaller than the outer diameter of the bottom end of the end cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the present invention.

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model from another angle.

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the end cover body of the utility model.

[0019] Figure numerals: 1. end cover body; 11. base; 12. bottom plate; 121. notch; 13. first protrusion; 14. first rib; 15. second rib; 16. second protrusion; 2. rubber pad; 21. plane portion; 22. frustum portion; 23. vertical portion; 3. circular hole; 4. metal insert; 5. through groove; 6. third rib; 7. convex strip; 8. air hole. DETAILED DESCRIPTION

[0020] The following is a detailed description of the lower end cover structure of the elastic-reducing split air spring of the present invention with reference to the accompanying drawings.

[0021] like Figures 1 to 4 As shown, a lower end cover structure of a spring-reducing split air spring includes an end cover body 1 and a rubber pad 2. A circular hole 3 is provided at the bottom end of the end cover body 1 and the circular hole 3 is coaxially arranged with the end cover body 1. The inner diameter of the circular hole 3 gradually decreases from bottom to top. The rubber pad 2 includes a coaxially arranged and annular flat portion 21 and a frustum portion 22. The frustum portion 22 is integrally formed at the inner hole of the flat portion 21. The rubber pad 2 is vulcanized at the bottom end of the end cover body 1 and the flat portion 21 fits the bottom end of the end cover body 1. The frustum portion 22 fits the inner wall of the circular hole 3, and the rubber pad 2 does not cover the upper end surface of the circular hole 3.

[0022] like Figure 4 As shown, the end cover body 1 includes a base 11, a bottom plate 12, a first protrusion 13, a plurality of first ribs 14 and a plurality of second ribs 15. The first protrusion 13 is provided at the bottom end of the base 11 and is coaxially arranged with the base 11. The circular hole 3 is provided at the bottom end of the first protrusion 13 and extends into the base 11. The plurality of first ribs 14 are equidistantly provided along the circumferential direction of the outer peripheral wall of the first protrusion 13 at the bottom end of the base 11 and are connected to the first protrusion 13. The plurality of second ribs 15 are equidistantly provided along the circumferential direction of the outer peripheral wall of the first protrusion 13 at the bottom end of the base 11 and are connected to the first protrusion 13. The bottom plate 12 is connected to a protrusion 13, and the bottom plate 12 is annular with a notch 121. The bottom plate 12 is arranged on the outer peripheral wall of the first protrusion 13 and the upper end of the bottom plate 12 is connected to all the first ribs 14. All the second ribs 15 are exposed from the notch 121. The bottom end of the bottom plate 12 is flush with the bottom end of the first protrusion 13. The flat portion 21 fits the bottom end of the bottom plate 12 and the bottom end of the first protrusion 13. The rubber pad 2 also includes a vertical portion 23, which is in contact with the outer peripheral wall of the first protrusion 13 exposed from the notch 121 and the side wall of the first rib 14.

[0023] Specifically, combining Figure 2 and Figure 4 As shown, both ends of the bottom plate 12 in the circumferential direction are connected to the two first ribs 14, and all the second ribs 15 are located between the two first ribs 14, and the two first ribs 14 are the starting and ending ends of the bottom plate 12 in the circumferential direction. Correspondingly, the shape of the planar portion 21 corresponds to the shape of the bottom plate 12, and the vertical portion 23 is arranged at a position corresponding to the notch 121. The side walls of the two first ribs 14 facing the second ribs 15 as the starting and ending ends of the bottom plate 12 are exposed from the notch 121 and are fitted by the vertical portion 23. Similarly, the outer peripheral wall of the first protrusion 13 corresponding to the notch 121 is exposed from the notch 121 and is fitted by the vertical portion 23, while the vertical portion 23 does not fit the second rib 15. The vertical portion 23 is also integrally formed with the planar portion 21 and the conical portion 22, that is, the rubber pad 2 is vulcanized as a whole at the bottom end of the end cover body 1.

[0024] In addition, the thickness of the planar portion 21 is 2 mm, the thickness of the frustum portion 22 is 0.6 mm, and the thickness of the vertical portion 23 is the same as that of the planar portion 21. Due to the consideration of the vulcanization process, the outer diameter of the planar portion 21 is smaller than the outer diameter of the bottom end of the end cover body 1, so that a portion of the outer edge of the bottom end of the end cover body 1 (that is, the bottom end of the bottom plate 12) is not adhered to the planar portion 21.

[0025] like Figure 3 As shown, the end cover body 1 also includes an annular second protrusion 16, which is provided on the upper end surface of the base 11 and is coaxially arranged with the base 11. An annular metal insert 4 is embedded in the second protrusion 16. The material of the metal insert 4 is preferably 45 steel. The inner wall of the second protrusion 16 is provided with a plurality of through grooves 5 at equal intervals along the circumference so that the metal insert 4 is exposed from the through grooves 5, and the through grooves 5 also extend to the upper end surface of the second protrusion 16, so that the upper end of the metal insert 4 is also exposed from the through grooves 5.

[0026] like Figure 3 As shown, a plurality of third ribs 6 are provided between the inner wall of the second protrusion 16 and the upper end surface of the base 11, and the plurality of third ribs 6 are equidistantly arranged along the circumference of the second protrusion 16; in addition, a plurality of convex strips 7 are provided on the upper end surface of the base 11 and are circumferentially arranged along the outer peripheral wall of the second protrusion 16, and each convex strip 7 is connected to the outer peripheral wall of the second protrusion 16; a plurality of air holes 8 are provided on the base 11 and pass through the base 11, and the air holes 8 are symmetrically distributed on the base 11.

[0027] The base 11 , the bottom plate 12 , the first protrusion 13 , the first rib 14 , the second rib 15 , the second protrusion 16 , the third rib 6 and the ridge 7 are all integrally formed, and the material is nylon material PA66+GF30, and the material of the rubber pad 2 is EPDM.

[0028] During the use of the end cover body 1, its bottom end and the inner wall of the circular hole 3 at the bottom end will contact the frame boundary. Therefore, a layer of rubber pad 2 is vulcanized at the bottom end of the end cover body 1, and the flat part 21 in the rubber pad 2 fits the bottom end of the end cover body 1, and the frustum part 22 in the rubber pad 2 fits the inner wall of the circular hole 3. During the use of the lower end cover, the rubber pad 2 contacts the frame boundary, thereby avoiding abnormal noise, reducing the wear of the lower end cover, and extending the service life of the lower end cover.

[0029] The above describes the implementation mode of the present invention in detail with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned implementation mode. All other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A lower end cover structure of a spring-reducing split air spring, characterized in that: The invention comprises an end cover body (1) and a rubber pad (2), wherein a circular hole (3) is provided at the bottom end of the end cover body (1) and the circular hole (3) is coaxially arranged with the end cover body (1), and the inner diameter of the circular hole (3) gradually decreases from bottom to top; the rubber pad (2) comprises a plane portion (21) and a frustum portion (22) which are coaxially arranged and both are annular; the frustum portion (22) is integrally formed at the inner hole of the plane portion (21); the rubber pad (2) is vulcanized at the bottom end of the end cover body (1), and the plane portion (21) is in contact with the bottom end of the end cover body (1), and the frustum portion (22) is in contact with the inner wall of the circular hole (3).

2. The lower end cover structure of the elastic-reducing split air spring according to claim 1 is characterized in that: The end cover body (1) comprises a base (11), a bottom plate (12), a first protrusion (13), a plurality of first ribs (14) and a plurality of second ribs (15), wherein the first protrusion (13) is arranged at the bottom end of the base (11) and is coaxially arranged with the base (11), the circular hole (3) is arranged at the bottom end of the first protrusion (13) and extends into the base (11), the plurality of first ribs (14) are equidistantly arranged at the bottom end of the base (11) along the circumferential direction of the outer wall of the first protrusion (13) and are connected to the first protrusion (13), and the plurality of second ribs (15) are equidistantly arranged at the bottom end of the base (11) along the circumferential direction of the outer wall of the first protrusion (13) and are connected to the first protrusion (13). (13), the bottom plate (12) is annular and provided with a notch (121), the bottom plate (12) is arranged on the outer peripheral wall of the first protrusion (13) and the upper end of the bottom plate (12) is connected to all the first ribs (14), all the second ribs (15) are exposed from the notch (121), the bottom end of the bottom plate (12) is flush with the bottom end of the first protrusion (13), the plane portion (21) is in contact with the bottom end of the bottom plate (12) and the bottom end of the first protrusion (13), and the rubber pad (2) further includes a vertical portion (23), the vertical portion (23) is in contact with the outer peripheral wall of the first protrusion (13) exposed from the notch (121) and the side wall of the first rib (14).

3. The lower end cover structure of the elastic-reducing split air spring according to claim 2 is characterized in that: The end cover body (1) further comprises an annular second protrusion (16), the second protrusion (16) being arranged on the upper end surface of the base (11) and being coaxially arranged with the base (11), an annular metal insert (4) being embedded in the second protrusion (16), and a plurality of through grooves (5) being equidistantly provided on the inner wall of the second protrusion (16) along the circumferential direction so that the metal insert (4) is exposed from the through grooves (5).

4. The lower end cover structure of the elastic-reducing split air spring according to claim 3 is characterized in that: A plurality of third ribs (6) are provided between the inner wall of the second protrusion (16) and the upper end surface of the base (11), and the plurality of third ribs (6) are equidistantly arranged along the circumference of the second protrusion (16).

5. The lower end cover structure of the elastic-reducing split air spring according to claim 3 is characterized in that: The upper end surface of the base (11) is provided with a plurality of convex strips (7) arranged along the circumferential direction of the outer peripheral wall of the second protrusion (16), and each of the convex strips (7) is connected to the outer peripheral wall of the second protrusion (16).

6. The lower end cover structure of the elastic-reducing split air spring according to claim 2, characterized in that: The base (11) is provided with a plurality of air holes (8) penetrating the base (11).

7. The lower end cover structure of the elastic-reducing split air spring according to claim 1 is characterized in that: The thickness of the planar portion (21) is 2 mm, and the thickness of the truncated cone portion (22) is 0.6 mm.

8. The lower end cover structure of the elastic-reducing split air spring according to claim 1 is characterized in that: The outer diameter of the plane portion (21) is smaller than the outer diameter of the bottom end of the end cover body (1).

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