A large torsion air spring strut structure, air spring and its application

Abstract

The present invention discloses a large torsion empty spring support structure, including a bladder skin with an empty spring body, the outer side of the upper part of the bladder skin is fixed by an upper pressure ring, the outer side of the lower part of the bladder skin is provided with a bladder guide sleeve, and a protective cover is covered on the bladder skin between the upper pressure ring and the bladder guide sleeve; the upper end of the protective cover is clamped on the upper end face of the upper pressure ring, the lower end of the protective cover is clamped on the upper end of the bladder guide sleeve, and a clamp ring for assembly position is sleeved on the outside of the protective cover near the lower edge of the upper pressure ring. The present invention arranges a protective cover on the outside of the bladder skin and between the upper pressure ring and the bladder guide sleeve, and sleeves a clamp ring on the outside of the protective cover and at the lower edge of the upper pressure ring. The protective cover is subjected to the radial force of the clamp ring, thereby constraining the bending position of the bladder skin during operation, reducing the wear of the lower edge of the upper pressure ring on the bladder skin, and at the same time, the rubber protective cover protects the bladder from damage such as gravel.

Description

Technical Field

[0001] The invention relates to the technical field of air spring struts, and in particular to a large torsion air spring strut structure, an air spring and applications thereof. Background Art

[0002] With the development of the automobile consumer market and the improvement of driving and riding needs, the integrated structure of air spring (abbreviated as "air spring") struts are increasingly widely used in new energy and luxury fuel-powered vehicle suspensions; in order to achieve a larger steering angle of the vehicle, the existing front spring double wishbone structure is optimized from a "triangle" with a single ball pin to a "quadrilateral" with a double ball pin. It is well known that the stability of the "quadrilateral" is worse than that of the "triangle". In this way, the suspension imposes a greater torsion and deflection angle on the air spring strut, which will cause the bladder skin to be squeezed more, and in this state, the bladder skin will over-expand and wear against the lower edge of the pressure ring.

[0003] The existing patent technology with patent publication number US20210172491A1 and patent name Vulcanized support ring for hybrid air spring bellows specifically discloses that "the air spring assembly particularly includes a bellows, which includes an outer surface, a first end and a second end, wherein the bellows includes a rubber material that can be expanded to an expanded diameter and an outer ring is arranged on the outer surface of the bellows between the first end and the second end, and the outer ring contains embedded ropes to define a constrained portion of the bellows between the expanded portions, thereby establishing a "B" shaped fold in the bellows". In the above-mentioned prior art, the outer ring is used to limit the outward expansion of the exposed bladder at the upper end of the air spring guide sleeve, but no corresponding protection measures are designed between the pressure ring and the bladder skin. Therefore, the bladder skin may be squeezed, causing the bladder skin to expand excessively and wear against the lower edge of the pressure ring.

[0004] The prior art with patent publication number DE102015215567A1 and patent name multi-bellows air spring specifically discloses that "a bellows air spring has two or more outwardly bead-shaped bellows parts, which are separated by circumferential contraction, and belt rings, especially metal rings, are arranged therein, and the bellows air spring is fixed by means of a connecting part, and the bellows air spring is designed as a cylindrical vulcanized bellows spring, and has one or more receptacles on its outer circumference for axially fixing the belt rings, wherein the bellows spring, belt ring and receptacle are also designed as protruding bellows parts protruding outward, such as a balloon under working pressure, and a contraction is formed between them". In the above prior art, a groove is provided on the outside of the bladder for fixing the support ring or the support ring is directly vulcanized on the outside of the bladder, but no corresponding protection measures are designed between the pressure ring and the bladder skin, so the bladder skin may be squeezed, causing the bladder skin to expand excessively and wear against the lower edge of the pressure ring. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to prevent the bag skin from being bent and worn when the empty spring is working.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A large torsion empty spring strut structure includes a bladder skin of an empty spring body, the outer side of the upper part of the bladder skin is fixed by an upper pressure ring, a bladder guide sleeve is provided on the outer side of the lower part of the bladder skin, and a protective cover is covered on the bladder skin between the upper pressure ring and the bladder guide sleeve; the upper end of the protective cover is clamped on the upper end face of the upper pressure ring, and the lower end of the protective cover is clamped on the upper end of the bladder guide sleeve, and a clamping ring for assembly position is sleeved on the outside of the protective cover near the lower edge of the upper pressure ring.

[0008] The present invention arranges a protective cover on the outside of the bladder skin and between the upper pressure ring and the bladder guide sleeve, and a clamping ring is sleeved on the outside of the protective cover and at the lower edge of the upper pressure ring. The protective cover is acted upon by the radial force of the clamping ring, thereby restricting the bending position of the bladder skin during operation and reducing the wear of the bladder skin by the lower edge of the upper pressure ring. At the same time, the rubber protective cover protects the bladder from damage such as sand and gravel.

[0009] As a further solution of the present invention: an annular groove is provided on the outer side of the protective cover near the lower edge of the upper pressure ring, and the clamping ring is located in the annular groove and presses the bottom of the annular groove in the thickness direction of the groove.

[0010] As a further solution of the present invention: the folding fulcrum of the bag skin is extended from the lower end of the upper pressure ring to the lower edge position of the convex hull pushed inwardly by the annular groove on the rubber protective cover, that is, point A.

[0011] As a further solution of the present invention: the inner diameter of the clamping ring is designed with a positive tolerance according to the outer diameter of the upper pressure ring after being buckled.

[0012] As a further solution of the present invention: the upper part of the protective cover is bent inwardly to clamp the upper end surface of the upper pressure ring; the lower part of the protective cover protrudes outwardly to form a groove to clamp with the protrusion at the upper end of the bladder guide sleeve.

[0013] As a further solution of the present invention: the protective height of the bladder guide sleeve is set to H2 and the exposed height of the bladder skin (6) is set to L2, then: H2 = (2 / 3) L2.

[0014] As a further solution of the present invention: the exposed height L2 of the bladder skin is 1.5 times of the existing exposed height L1 of the bladder skin, and the existing exposed height of the bladder skin ranges from 33mm to 35mm.

[0015] As a further solution of the present invention: the protective cover is in a cylindrical structure as a whole, and the inner side of the protective cover is in contact with the bladder skin.

[0016] The invention also discloses an air spring, which comprises the large torsion air spring support structure.

[0017] The invention also discloses an application of an air spring in a new energy vehicle or a fuel vehicle.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Based on the prior art, the present invention increases the exposed height L1 of the existing bladder skin, so that the exposed height L2 is about 1.5 times of the exposed height L1 of the existing bladder skin, thereby ensuring that there is enough bladder skin involved in the torsion of the air spring body, and at the same time, the protective height H2 of the bladder skin guide sleeve outside the bladder skin is increased to constrain the exposed bladder skin, thereby avoiding excessive expansion of the bladder skin during torsion and deflection;

[0020] 2. The present invention sets a protective cover on the outside of the bladder skin and between the upper pressure ring and the bladder guide sleeve, and sets a clamp ring on the outside of the protective cover and at the lower edge of the upper pressure ring. The protective cover is acted upon by the radial force of the clamp ring, thereby constraining the bending position of the bladder skin during operation, avoiding the wear of the bladder skin by the lower edge of the upper pressure ring. At the same time, the rubber protective cover protects the bladder skin from being polluted by sand, dust, oil, etc., and prevents the normal operation of the bladder skin from being affected.

[0021] 3. The present invention can move downward the position of the flexure caused by excessive expansion of the bladder skin through the design of the clamp ring, so that the folding fulcrum of the bladder skin is extended from the lower end of the upper pressure ring to the lower edge A of the convex hull pushed inward by the annular groove on the rubber protective cover constrained by the clamp ring, and the working nature is also adjusted from sliding contact to rolling contact, thereby improving the working environment of the bladder skin and avoiding early contact and friction between the bladder skin and the lower end surface of the upper pressure ring;

[0022] 4. The upper part of the protective cover of the present invention is bent inwards, which is assembled and positioned with the upper end surface of the upper pressure ring. The lower part of the protective cover protrudes outwards to form a slot B which is just engaged with the protrusion on the upper end of the bladder guide sleeve, ensuring the stable installation of the protective cover, achieving better protection effect, and thus increasing the service life of the bladder skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an existing large torsion empty spring support structure when a protective cover is not installed;

[0024] Figure 2 for Figure 1 A partial enlarged view of

[0025] Figure 3 This is a schematic structural diagram of a large torsion empty spring support structure according to an embodiment of the present invention;

[0026] Figure 4 For the embodiment of the present invention Figure 1A magnified view of area A in;

[0027] Figure 5 For the embodiment of the present invention Figure 4 A partial enlarged view of the

[0028] Figure 6 This is a schematic diagram of the structure of a protective cover according to an embodiment of the present invention;

[0029] Figure 7 is a cross-sectional view of a protective cover according to an embodiment of the present invention;

[0030] Description of reference numerals:

[0031] 1. Buffer block; 2. Upper air chamber; 3. Upper pressure ring; 4. Clamp ring; 5. Protective cover; 51. Annular groove; 6. Bladder skin; 7. Bladder guide sleeve; 8. Support ring; 9. Protective cover; 10. Shock absorber. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] Reference Figure 3 , Figure 4 and Figure 5 A large torsion empty spring strut structure includes an upper pressure ring 3, a clamping ring 4, a protective cover 5, a bladder skin 7 and a bladder guide sleeve 7, wherein the upper outer side of the bladder skin 6 is fixed to the outside of the empty spring (i.e., air spring) through the upper pressure ring 3, and the lower outer side of the bladder skin 6 is provided with a bladder guide sleeve 7.

[0035] Reference Figure 1 , Figure 2 and Figure 3 , let the exposed height of the original basic bladder skin 6 be L1, and the protective height of the original basic bladder guide sleeve 7 be H1; and the present application increases the exposed height of the bladder skin 6 and sets it to L2 on the basis of the original exposed height L1, to ensure that there is enough bladder skin 6 involved in the torsion of the empty spring body, and then increases the protective height H2 of the bladder guide sleeve 7 to constrain the exposed bladder skin 6, and extends the protective height of the bladder guide sleeve 7 to H2, and the extended length of the bladder guide sleeve 7 is used to constrain the excessive expansion of the bladder skin 6 during the torsion and deflection process, and the upper end surface of the bladder guide sleeve 7 is at the upper middle 2 / 3 position of the length of the unpressed bladder skin 6 (i.e., the exposed height L2 of the bladder skin 6) (such as Figure 3As shown), the entire length L2 of the exposed bladder skin 6 cannot be completely restrained and protected by the bladder guide sleeve 7, so a protective cover 5 is added, and a clamping ring 4 is installed outside the protective cover 5. The function of the clamping ring 4 is to move downward the position of the bending caused by excessive expansion of the bladder skin 6, so as to avoid early contact and friction between the bladder skin 6 and the lower end face of the upper pressure ring 3.

[0036] It should be noted that the exposed height L1 of the original basic bladder skin 6 is about 33mm-35mm, and the exposed height L2 of the bladder skin after the increase in the present application is about 1.5 times of L1 (refer to Figure 2 and Figure 5 ).

[0037] In order to ensure that the air spring has sufficient flexibility and sufficient avoidance space when working, the entire length of the exposed bladder skin 6 cannot be constrained and protected by the bladder guide sleeve 7. In order to avoid the bladder skin being contaminated by sand, dust, oil, etc. due to excessive exposure, thereby affecting the normal operation of the bladder skin; at the same time, the position near the lower edge of the upper pressure ring 3 will wear when the bladder skin is bent or twisted. Therefore, the present application covers the bladder skin 6 between the bladder guide sleeve 7 and the upper pressure ring 3 with a protective cover 5.

[0038] Further, see Figure 6 and Figure 7 The protective cover 5 covers the outer surface of the bladder skin 6 between the upper pressure ring 3 and the bladder guide sleeve 7. The material of the protective cover 5 is a rubber product. The protective cover 5 is a cylindrical structure as a whole. The inner side of the protective cover 5 is in contact with the bladder skin 6; the upper part of the protective cover 5 is bent inwardly to just clamp the upper end surface of the upper pressure ring 3; the lower part of the protective cover 5 protrudes outward to form a card slot B (i.e. Figure 5 Point B in the figure) is just engaged with the raised part at the upper end of the bladder guide sleeve 7; a clamping ring 4 is sleeved on the outside of the protective cover 5 near the lower edge of the upper pressure ring 3; an annular groove 51 is opened on the outside of the protective cover 5 near the lower edge of the upper pressure ring 3, and the clamping ring 4 is located in the annular groove 51 and squeezes the bottom of the annular groove 51 in the thickness direction of the annular groove 51.

[0039] Furthermore, the material of the clamp ring 4 is steel wire, and the inner diameter of the clamp ring 4 is designed according to the positive tolerance of the outer diameter after the upper pressure ring 3 is buckled. The clamp ring 4 is clamped in the annular groove 51 designed on the protective cover 5, and squeezes the bottom of the annular groove 51 on the rubber protective cover 5 in the thickness direction of the groove, constraining the bending position of the bladder skin during operation, thereby keeping away from the wear of the bladder skin by the lower edge of the upper pressure ring 3; therefore, the folding fulcrum of the bladder skin 6 is extended from the lower end of the upper pressure ring 3 to the lower edge of the convex hull pushed inward by the annular groove 51 in the rubber protective cover 5 constrained by the clamp ring 4, that is, Figure 5 At point A in the figure, the working nature is also adjusted from sliding contact to rolling contact, which improves the working environment of the bladder skin. In addition, since the protective cover 5 is assembled and positioned by the upper end face of the upper pressure ring 3, the clamping ring 4 can be well in the preset working position, thereby improving the service life of the bladder skin.

[0040] Example 2

[0041] Reference Figure 3 , Figure 4 and Figure 5 The present embodiment discloses an air spring, comprising the upper pressure ring 3, the clamping ring 4, the protective cover 5, the bladder skin 6 and the bladder guide sleeve 7 in the embodiment 1, and also comprising a buffer block 1, an upper air chamber 2, a support ring 8, a protective cover 9 and a shock absorber 10, wherein the buffer block 1 is located inside the upper air chamber 2, the upper pressure ring 3 can fix the upper part of the bladder skin 6 outside the upper air chamber 2, the shock absorber 10 is located below the buffer block 1, and a space is left between the two, and the protective cover 5 is just located outside the space, a protective cover 9 is arranged outside the shock absorber 10, the support ring 8 contacts the inner side of the bladder skin 6 and expands the bladder skin 6 to produce an interference fit, and the bladder guide sleeve 7 is clamped to the expanded position of the support ring 8 and the bladder skin 6 by buckling.

[0042] Example 3

[0043] Based on Example 2, this example discloses an application of an air spring in a new energy vehicle or a fuel vehicle.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large torsion empty spring strut structure, comprising a bladder skin (6) of an empty spring body, wherein the upper outer side of the bladder skin (6) is fixed by an upper pressure ring (3), and the lower outer side of the bladder skin (6) is provided with a bladder guide sleeve (7), characterized in that: A protective cover (5) is covered on the bladder skin (6) between the upper pressure ring (3) and the bladder guide sleeve (7); The upper end of the protective cover (5) is clamped on the upper end surface of the upper pressure ring (3), and the lower end of the protective cover (5) is clamped on the upper end of the bladder guide sleeve (7). A clamping ring (4) for assembly position is sleeved on the outside of the protective cover (5) near the lower edge of the upper pressure ring (3).

2. A large torsion empty spring strut structure according to claim 1, characterized in that: An annular groove (51) is provided on the outer side of the protective cover (5) near the lower edge of the upper pressure ring (3); the clamping ring (4) is located in the annular groove (51) and presses the bottom of the annular groove (51) in the thickness direction of the groove.

3. A large torsion empty spring strut structure according to claim 2, characterized in that: The folding fulcrum of the hollow bag skin (6) is extended from the lower end of the upper pressure ring (3) to the lower edge position A of the convex bulge pushed inwardly by the annular groove (51) on the rubber protective cover (5).

4. The large torsion empty spring strut structure according to claim 1, characterized in that: The inner diameter of the clamping ring (4) and the outer diameter of the upper pressing ring (3) after being pressed are designed with a positive tolerance.

5. The large torsion empty spring strut structure according to claim 1, characterized in that: The upper part of the protective cover (5) is bent inwards to clamp the upper pressure ring (3); the lower part of the protective cover (5) is protruded outwards to form a clamping groove (B) which is clamped with the protruding part at the upper end of the bladder guide sleeve (7).

6. The large torsion empty spring strut structure according to claim 1, characterized in that: The protective height of the bladder guide sleeve (7) is set to H2, and the exposed height of the bladder skin (6) is set to L2, then: H2 = (2 / 3) L2.

7. A large torsion empty spring strut structure according to claim 6, characterized in that: The exposed height L2 of the bladder skin (6) is 1.5 times the exposed height L1 of the existing bladder skin, and the value range of the exposed height L1 of the existing bladder skin is 33mm-35mm.

8. The large torsion empty spring strut structure according to claim 1, characterized in that: The protective cover (5) is in a cylindrical structure as a whole, and the inner side of the protective cover (5) is in contact with the bladder skin (6).

9. An air spring, characterized in that: The air spring comprises a large torsion air spring strut structure as described in any one of claims 1-8.

10. Use of the air spring according to claim 9 in new energy vehicles or fuel vehicles.

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