A guide arm assembly structure of an automobile air suspension

Abstract

The application relates to the technical field of automobile air suspension, and particularly discloses an air suspension guide arm assembly structure, wherein the leaf spring seat is supported on the guide arm body, the supporting plate is supported on the axle, the U-shaped bolt is arranged on the guide arm body and the leaf spring seat in sequence and is in threaded connection with the supporting plate, so that the axle is clamped between the leaf spring seat and the supporting plate, the first clamping piece and the second clamping piece are arranged on the two sides of the leaf spring seat in the width direction, the first clamping piece penetrates the leaf spring seat and is in abutment with the guide arm body, and the second clamping piece penetrates the leaf spring seat and is in abutment with the guide arm body. Through the double-side clamping of the first clamping piece and the second clamping piece and the cooperation of the leaf spring seat and the supporting plate, effective positioning and clamping between the guide arm body and the axle are realized, external lateral forces borne by the guide arm body are mainly offset by effective force couples formed by the first clamping piece, the second clamping piece and the first positioning pin, and the connection reliability and durability of the assembly structure system of the guide arm body are effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile air suspension, in particular to a guide arm assembly structure of automobile air suspension. BACKGROUND

[0002] The air suspension system can adjust the height of the chassis according to the ups and downs of the road, so that the vehicle can adapt to the driving requirements under various road conditions. At the same time, the composite air suspension system has the advantages of low cost and large roll stiffness. As the most important component of the composite air suspension system, the guide arm has been applied more and more widely in recent years.

[0003] The existing guide arm and axle assembly structure is usually fixed on the axle by U-shaped bolts. When the vehicle is running, the friction force generated by the shaft force of the U-shaped bolt is used to resist the lateral force of the ground transmitted by the axle. Although this structure is simple, it is not reliable. If the U-shaped bolt torque is not tightened regularly, the shaft force of the U-shaped bolt will decrease after the vehicle travels a certain distance, and the friction force will decrease sharply, which will further cause the connection failure of the guide arm, and even the guide arm will be broken. SUMMARY

[0004] The purpose of the present application is to provide a guide arm assembly structure of automobile air suspension, which can improve the connection reliability and durability of the guide arm.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] The present application provides a guide arm assembly structure of automobile air suspension, comprising:

[0007] a guide arm body;

[0008] a leaf spring seat supported on the guide arm body;

[0009] a supporting plate supported on the axle;

[0010] a plurality of U-shaped bolts, which are sequentially across the guide arm body and the leaf spring seat, and are threadedly connected with the supporting plate, so that the axle is clamped between the leaf spring seat and the supporting plate;

[0011] a first clamping member and a second clamping member, the first clamping member and the second clamping member are respectively arranged on both sides of the leaf spring seat in the width direction, the first clamping member penetrates the leaf spring seat and abuts against the guide arm body, and the second clamping member penetrates the leaf spring seat and abuts against the guide arm body.

[0012] As an improved technical scheme of the above-mentioned guide arm assembly structure of the automobile air suspension, the guide arm assembly structure of the automobile air suspension further comprises a first positioning pin, which is arranged in a vertical direction and connected between the leaf spring seat and the guide arm body.

[0013] As an improved technical scheme of the above-mentioned guide arm assembly structure of the automobile air suspension, the first positioning pin is in a stepped shape, and comprises a first segment and a second segment connected in sequence, the outer diameter of the first segment is larger than that of the second segment, the first segment is connected to the leaf spring seat, and the second segment is connected to the guide arm body.

[0014] As an improved technical scheme of the above-mentioned guide arm assembly structure of the automobile air suspension, the guide arm assembly structure of the automobile air suspension further comprises a cover plate and a second positioning pin, the cover plate is clamped between the U-shaped bolts and the guide arm body, and the second positioning pin is connected between the cover plate and the guide arm body.

[0015] As an improved technical scheme of the above-mentioned guide arm assembly structure of the automobile air suspension, the guide arm body has a first free end and a second free end, the first free end is used for connecting a vehicle frame, the second free end is used for connecting an air spring, the first positioning pin is farther away from the first free end than the second positioning pin, and the second positioning pin is closer to the second free end than the center plane of the axle.

[0016] As an improved technical scheme of the above-mentioned guide arm assembly structure of the automobile air suspension, the guide arm body is provided with a first positioning hole and a second positioning hole, the first positioning hole is used for cooperating with the first positioning pin, the second positioning hole is used for cooperating with the second positioning pin, and the edges of the first positioning hole and the second positioning hole are both provided with a rounded corner.

[0017] As an improved technical scheme of the above-mentioned guide arm assembly structure of the automobile air suspension, the second positioning pin is an elastic pin.

[0018] As an improved technical scheme of the above-mentioned guide arm assembly structure of the automobile air suspension, the number of the U-shaped bolts is two, the axle is arranged between the two U-shaped bolts, the leaf spring seat is arranged between the two connecting arms of the U-shaped bolts, and the leaf spring seat can abut against the two connecting arms of the U-shaped bolts.

[0019] As an improved technical scheme of the above-mentioned guide arm assembly structure of the automobile air suspension, the leaf spring seat is provided with two first mounting holes and a second mounting hole, the two first mounting holes are respectively screwed with the first clamping piece and the second clamping piece, and the second mounting hole is a flat countersunk hole and cooperates with the first positioning pin.

[0020] As a preferred technical scheme of the above-mentioned guide arm assembly structure of the automobile air suspension, the leaf spring seat is provided with a first protruding part and a second protruding part in the width direction, the supporting plate is provided with a containing groove, and the axle is arranged in the containing groove and located between the first protruding part and the second protruding part.

[0021] The present application has the following beneficial effects:

[0022] The present application provides a guide arm assembly structure of an automobile air suspension, which comprises a guide arm body, a leaf spring seat, a supporting plate, a plurality of U-shaped bolts, a first clamping part and a second clamping part. The leaf spring seat is supported on the guide arm body, the supporting plate is supported on the axle, the U-shaped bolts are sequentially arranged across the guide arm body and the leaf spring seat and are threadedly connected with the supporting plate, so that the axle is clamped between the leaf spring seat and the supporting plate. The first clamping part and the second clamping part are respectively arranged on both sides of the leaf spring seat in the width direction. The first clamping part penetrates the leaf spring seat and abuts against the guide arm body, and the second clamping part penetrates the leaf spring seat and abuts against the guide arm body. In this way, the first clamping part and the second clamping part are used for bilateral clamping, and the leaf spring seat and the supporting plate are used for cooperation, so as to realize effective positioning and clamping between the guide arm body and the axle. The external lateral force received by the guide arm body is mainly offset by the effective force couple formed by the first clamping part, the second clamping part and the first positioning pin. Unlike the unreliable friction force generated by the U-shaped bolts in the prior art, the connection reliability and durability of the assembly structure system of the guide arm body are greatly improved, and the failure risks of loosening of the U-shaped bolts and fracture of the guide arm body are effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The present application provides a guide arm assembly structure of an automobile air suspension.

[0024] Figure 2 The present application provides a guide arm assembly structure of an automobile air suspension. Figure 1 ;

[0025] Figure 3 The present application provides a guide arm assembly structure of an automobile air suspension. Figure 2 ;

[0026] Figure 4 The present application provides a guide arm assembly structure of an automobile air suspension. Figure 3 The present application provides a guide arm assembly structure of an automobile air suspension.

[0027] Figure 5 The present application provides a guide arm assembly structure of an automobile air suspension.

[0028] Figure 6 The present application provides a guide arm assembly structure of an automobile air suspension.

[0029] wherein:

[0030] 1. a guide arm body;

[0031] 2. a leaf spring seat; 21, a first protruding part; 22, a second protruding part; 23, a first mounting hole; 24, a sunroof hole; 25, a second mounting hole;

[0032] 3. a supporting plate; 4, an axle; 5, a U-shaped bolt; 6, a first clamping part; 7, a second clamping part; 8, a first positioning pin; 9, a cover plate; 10, a second positioning pin; 11, a rounded corner; 12, a ball joint bushing; 13, a lower bracket of a shock absorber; 14, a third mounting hole; 15, a counterbore. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or similar components have the same or similar designations throughout the various figures. The embodiments described below are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.

[0034] In the description of the present application, it should be noted that the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms “first” and “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms “first position” and “second position” are two different positions.

[0035] Unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting”, “fixing” should be understood broadly, for example, can be fixed connection, can also be detachable connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] like Figures 1 to 6 As shown, this embodiment provides a guide arm assembly structure for an automotive air suspension. The guide arm assembly structure includes: a guide arm body 1, a leaf spring seat 2, a support plate 3, several U-bolts 5, a first clamping member 6, and a second clamping member 7. The leaf spring seat 2 is supported on the guide arm body 1, and the support plate 3 is supported on the axle 4. The U-bolts 5 pass through the guide arm body 1 and the leaf spring seat 2 in sequence and are threadedly connected to the support plate 3 so that the axle 4 is engaged between the leaf spring seat 2 and the support plate 3. The first clamping member 6 and the second clamping member 7 are respectively disposed on both sides of the leaf spring seat 2 in the width direction. The first clamping member 6 passes through the leaf spring seat 2 and abuts against the guide arm body 1, and the second clamping member 7 passes through the leaf spring seat 2 and abuts against the guide arm body 1. This configuration, employing the double-sided clamping of the first clamping member 6 and the second clamping member 7, along with the leaf spring seat 2 and the support plate 3, effectively positions and clamps the guide arm body 1 and the axle 4. The external lateral force it experiences is mainly offset by the effective torque formed by the first clamping member 6 and the second clamping member 7. This differs from the unreliability of existing technologies that rely solely on the friction force generated by the U-bolt 5, greatly improving the connection reliability and durability of the assembly structure system of the guide arm body 1, and effectively reducing the risk of loosening of the U-bolt 5 and breakage of the guide arm body 1.

[0039] It should be noted that both the first clamping member 6 and the second clamping member 7 are bolts. During assembly, the first clamping member 6 and the second clamping member 7 can be adapted to be set as internal hex bolts or external hex bolts according to the gap distance between the two in the air suspension system and the side of the vehicle frame longitudinal beam, so as to improve the convenience of installation and adjustment.

[0040] Optionally, the guide arm assembly structure of the automobile air suspension further comprises a first positioning pin 8, which is arranged in a vertical direction and connected between the leaf spring seat 2 and the guide arm body 1. In this way, the first positioning pin 8 can form an effective force couple with the first clamping piece 6 and the second clamping piece 7 to offset the external lateral force, further improving the connection reliability and stability of the assembly structure system of the guide arm body 1.

[0041] Optionally, in order to reduce the influence of the positioning hole for mounting the first positioning pin 8 on the guide arm body 1 on the structural strength of the guide arm body 1 itself, the first positioning pin 8 is in a stepped shape, and the first positioning pin 8 comprises a first segment and a second segment connected in sequence, the outer diameter of the first segment is greater than that of the second segment, and the first segment is connected to the leaf spring seat 2, and the second segment is connected to the guide arm body 1.

[0042] Optionally, the guide arm assembly structure of the automobile air suspension further comprises a cover plate 9 and a second positioning pin 10, the cover plate 9 is clamped between the plurality of U-shaped bolts 5 and the guide arm body 1, and the second positioning pin 10 is connected between the cover plate 9 and the guide arm body 1.

[0043] Further, the second positioning pin 10 is a resilient pin. It adopts the design of a resilient cylindrical pin, which can effectively reduce the difficulty of machining while ensuring positioning accuracy compared with a solid cylindrical pin.

[0044] Optionally, the guide arm body 1 has a first free end and a second free end, the first free end is connected to the vehicle frame through a ball joint bushing 12, and the second free end is used to connect an air spring, the first positioning pin 8 is farther away from the first free end than the second positioning pin 10, and the second positioning pin 10 is closer to the second free end than the center plane of the axle 4.

[0045] Optionally, the guide arm body 1 is provided with a first positioning hole and a second positioning hole, the first positioning hole is used to cooperate with the first positioning pin 8, and the second positioning hole is used to cooperate with the second positioning pin 10, and the edges of the first positioning hole and the second positioning hole are both provided with a rounded corner 11. In this way, the rounded corner 11 can play a guiding role in the assembly of the first positioning pin 8 and the second positioning pin 10, and more importantly, it can reduce the local stress concentration of the guide arm body 1 at the edges of the first positioning hole and the second positioning hole, avoiding the failure of cracks or fractures of the guide arm body 1 at the first positioning hole and the second positioning hole during use. Of course, in other embodiments, the edges of the first positioning hole and the second positioning hole can also be provided with chamfers.

[0046] Please refer to Figure 6As shown, in the embodiment, two first mounting holes 23 are formed on the leaf spring seat 2, and the two first mounting holes 23 are matched with the first clamping part 6 and the second clamping part 7 respectively. The first mounting hole 23 is a threaded hole, and a large pitch is adopted to ensure the strength of the threaded connection. A second mounting hole 25 matched with the first positioning pin 8 is also formed on the leaf spring seat 2, and the second mounting hole 25 is designed as a flat counterbore to avoid the positioning hole penetrating through the base body of the leaf spring seat 2 due to the excessive depth of the conventional positioning hole with an inclined surface. A rectangular sunroof hole 24 structure is formed in the middle of the leaf spring seat 2, which can realize the lightweight of the leaf spring seat 2 while providing sufficient welding space for the leaf spring seat 2.

[0047] Optionally, the number of the U-shaped bolts 5 is two, the axle 4 is arranged between the two U-shaped bolts 5, and the leaf spring seat 2 is arranged between the two connecting arms of the U-shaped bolts 5 and can abut against the two connecting arms of the U-shaped bolts 5. Further, the U-shaped bolt 5 closest to the first free end can abut against the side plane of the leaf spring seat 2 along the length direction of the leaf spring seat 2, that is, a small gap matching design is adopted to further limit the deformation degree of the U-shaped bolt 5 under the action of the lateral, longitudinal and torque of the guide arm body 1, thereby protecting the U-shaped bolt 5 and reducing the risk of loosening and breaking of the U-shaped bolt 5.

[0048] Optionally, the guide arm body 1 is Z-shaped.

[0049] Optionally, in order to further ensure the connection stability and reliability between the guide arm body 1 and the axle 4, the leaf spring seat 2 is spaced apart in the width direction and provided with a first protruding part 21 and a second protruding part 22, the bracket 3 is provided with a receiving groove, and the axle 4 is arranged in the receiving groove and located between the first protruding part 21 and the second protruding part 22.

[0050] Specifically, the following scheme is exemplarily given in the embodiment: the second free end of the guide arm body 1 is designed as an upper flat surface and a lower inclined surface structure, the upper surface is provided with an air spring mounting surface, and three third mounting holes 14 are formed, the middle third mounting hole 14 is used for installing an air spring, and the two side third mounting holes 14 are used for installing lower shock absorber brackets, the extension direction of each third mounting hole 14 is arranged vertically to the mounting surface, the lower side of the third mounting hole 14 is provided with a counterbore 15, and the counterbore 15 is arranged parallel to the air spring mounting surface.

[0051] Further, in order to realize better lightweight and reduce the cost, the lower shock absorber bracket is designed as a sheet metal bending part, and a multiple bending process is adopted to meet the width requirement of the shock absorber mounting interface. The lower shock absorber bracket is closely attached to the air spring mounting surface and is fastened and connected through a bolt and a nut.

[0052] Obviously, the above embodiments of the present application are merely example for clearly explaining the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A guide arm assembly structure for an automotive air suspension, characterized in that, The utility model relates to a kind of guiding arm, including: Guiding arm body (1); Leaf spring seat (2), the leaf spring seat (2) is supported in the guiding arm body (1); Supporting plate (3), the supporting plate (3) is supported in axle (4); Several U-shaped bolts (5), the U-shaped bolt (5) is sequentially across the guiding arm body (1) with the leaf spring seat (2), and is connected with the supporting plate (3) with screw thread, to make the axle (4) is clamped in the leaf spring seat (2) with the supporting plate (3) between; First clamping part (6) and second clamping part (7), the first clamping part (6) and the second clamping part (7) are respectively arranged in the leaf spring seat (2) width direction's two sides, the first clamping part (6) is threaded the leaf spring seat (2) and is in contact with the guiding arm body (1), the second clamping part (7) is threaded the leaf spring seat (2) and is in contact with the guiding arm body (1); First positioning pin (8), the first positioning pin (8) is arranged along vertical direction, and is connected between the leaf spring seat (2) and the guiding arm body (1); Cover plate (9) and second positioning pin (10), the cover plate (9) is clamped in several the U-shaped bolt (5) with the guiding arm body (1) between, the second positioning pin (10) is connected between the cover plate (9) and the guiding arm body (1); The guiding arm body (1) has first free end and second free end, the first free end is used to connect frame, the second free end is used to connect air spring, the first positioning pin (8) is away from the first free end compared with the second positioning pin (10), the second positioning pin (10) is close to the second free end compared with the center surface of the axle (4); The leaf spring seat (2) is provided with two first installation hole (23) and second installation hole (25), two the first installation hole (23) is respectively connected with the first clamping part (6) and the second clamping part (7) with screw thread, the second installation hole (25) is flat counterbore, and is matched with the first positioning pin (8).

2. The automobile air suspension guide arm assembly structure according to claim 1, characterized by, The first positioning pin (8) is in the form of a step, the first positioning pin (8) includes first section and second section connected in sequence, the outer diameter of the first section is greater than the outer diameter of the second section, the first section is connected to the leaf spring seat (2), and the second section is connected to the guiding arm body (1).

3. The automobile air suspension guide arm assembly structure according to claim 1, characterized by, The guiding arm body (1) is provided with first positioning hole and second positioning hole, the first positioning hole is used to cooperate with the first positioning pin (8), and the second positioning hole is used to cooperate with the second positioning pin (10), and the edge of the first positioning hole and the edge of the second positioning hole are provided with rounded corners (11).

4. The automobile air suspension guide arm assembly structure according to claim 1, characterized by, The second positioning pin (10) is a resilient pin.

5. The knuckle assembly of an air suspension of a vehicle according to any one of claims 1 to 4, characterized in that, The number of the U-shaped bolt (5) is two, the axle (4) is arranged between the two U-shaped bolts (5), the leaf spring seat (2) is arranged between the two connecting arms of the U-shaped bolt (5), and the leaf spring seat (2) can be in contact with the two connecting arms of the U-shaped bolt (5).

6. The knuckle assembly of an air suspension of a vehicle according to any one of claims 1 to 4, characterized in that, The plate spring seat (2) is provided with a first protruding part (21) and a second protruding part (22) in the width direction, the supporting plate (3) is provided with a containing groove, and the axle (4) is arranged in the containing groove and between the first protruding part (21) and the second protruding part (22).

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