Swing arm structure, suspension system and vehicle

Abstract

The utility model belongs to the technical field of vehicles, and discloses a swing arm structure, a suspension system and a vehicle, the swing arm structure comprises a swing arm main body, a connecting mechanism, a reinforcing piece and a connecting piece, a first connecting arm is connected with a large shaft sleeve, a second connecting arm is connected with a small shaft sleeve, a third connecting arm is connected with a ball pin, and the reinforcing piece is of a trapezoidal structure and is provided with a through hole; the third connecting arm is provided with a connecting hole, the connecting piece sequentially penetrates through the through hole and the connecting hole and is connected to the ball pin, the reinforcing piece of the trapezoidal structure and the ball pin are fixed to the mounting faces on the two sides of the third connecting arm respectively, the rigidity of the mounting faces of the third connecting arm is improved, and force is dispersed to the whole mounting faces. The flanging is arranged on the reinforcing piece in a semi-surrounding mode, the stress dispersing effect is achieved, the path of force transmitted to the swing arm body is more balanced, the risk of breakage at the transition fillet position from the installation plane to the swing arm body is avoided, and the overall structural strength and the anti-fatigue performance are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a swing arm structure, a suspension system and a vehicle. Background Art

[0002] The swing arm is the connecting mechanism between the frame and the wheel. Its function is to guide and support the suspension. It can effectively improve the stability of the car and enable the driver to easily control the direction of the car.

[0003] To ensure sufficient rigidity and strength, swing arms typically utilize a welded, buckled-together structure consisting of two plates. Conventional swing arms are prone to fatigue failures near the bolted connection of the ball joint, particularly at the transition between the mounting surface and the main structure of the swing arm. This can lead to failures such as the ball joint coming out of place or the arm breaking.

[0004] Therefore, there is an urgent need for a swing arm structure, a suspension system and a vehicle to solve the above problems. Utility Model Content

[0005] According to one aspect of the present invention, a swing arm structure is provided, which plays a role in dispersing stress. The path of force transmission to the swing arm body is more balanced, avoiding the risk of fracture at the transition radius from the mounting surface to the swing arm body, and improving the overall structural strength and fatigue resistance.

[0006] In order to solve the above problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] The swing arm structure includes:

[0008] Swing arm body;

[0009] A connecting mechanism, the connecting mechanism comprising a first connecting arm, a second connecting arm, and a third connecting arm provided on the swing arm body, the first connecting arm being connected to the large shaft sleeve, the second connecting arm being connected to the small shaft sleeve, the third connecting arm being connected to the ball pin, the third connecting arm being provided with a connecting hole, and an outer edge of the third connecting arm being provided with a flange;

[0010] A reinforcement member, wherein the reinforcement member has a trapezoidal structure and is provided with a through hole;

[0011] A connecting piece passes through the through hole and the connecting hole in sequence and is connected to the ball pin.

[0012] Preferably, the flange is in a U-shaped structure.

[0013] Preferably, the flange and the third connecting arm are integrally formed.

[0014] Preferably, the third connecting arm includes a connecting portion and a recessed portion, one end of the connecting portion is connected to the swing arm body, the other end of the connecting portion is connected to the recessed portion, one side of the recessed portion abuts against the reinforcement, and the other side of the recessed portion abuts against the connecting end of the ball pin.

[0015] Preferably, the connecting portion has two reinforcing ribs, the two reinforcing ribs are arranged in the recessed portion, and the two reinforcing ribs are respectively in contact with two ends of the flange.

[0016] Preferably, the reinforcement comprises two welding portions, and the two welding portions are welded and fixed to the flange.

[0017] Preferably, the reinforcement further includes an avoidance portion, the avoidance portion is located between the two welding portions, and the avoidance portion is spaced apart from the flange.

[0018] Preferably, the first connecting arm is provided with a card interface, the card interface is an arc-shaped structure, and the inner peripheral wall of the card interface is fixedly connected to the outer periphery of the large shaft sleeve.

[0019] According to another aspect of the present invention, a suspension system is provided, comprising a suspension body and the aforementioned swing arm structure, wherein the swing arm structure is connected to the suspension body.

[0020] According to another aspect of the present invention, a vehicle is provided, comprising a vehicle frame and the above-mentioned suspension system, wherein the suspension system is arranged on the vehicle frame.

[0021] The beneficial effects of the utility model are:

[0022] The utility model provides a swing arm structure, in which a first connecting arm, a second connecting arm and a third connecting arm are provided on the swing arm body, the first connecting arm is connected to the large shaft sleeve, the second connecting arm is connected to the small shaft sleeve, and the third connecting arm is connected to the ball pin. The reinforcement member is a trapezoidal structure, the reinforcement member is provided with a through hole, the third connecting arm is provided with a connecting hole, the connecting member passes through the through hole and the connecting hole in sequence and is connected to the ball pin, and under the action of the connecting member, the reinforcement member and the ball pin of the trapezoidal structure are respectively fixed to the mounting surfaces on both sides of the third connecting arm, so that the rigidity of the mounting surface of the third connecting arm is improved and the force is dispersed to the entire mounting surface. The outer edge of the third connecting arm is provided with a flange, which is semi-enclosed around the reinforcement plate, which plays a role in dispersing stress, and the path of force transmission to the swing arm body is more balanced, avoiding the risk of fracture at the transition radius from the mounting plane to the swing arm body, improving the overall structural strength and fatigue resistance, and having a certain degree of reliability and safety.

[0023] This embodiment also provides a suspension system comprising a suspension body and a swing arm structure. The swing arm structure is connected to the suspension body and is located at the bottom of the suspension system, primarily connecting the wheel bearing and the suspension body. The suspension system is mounted between the axle and the vehicle frame. The third connecting arm of the swing arm structure is provided with a flange and reinforcement, which increases the rigidity of the mounting surface of the third connecting arm and disperses the force across the entire mounting surface, thus dispersing stress. This provides a more balanced path for force transmission to the swing arm body, avoiding the risk of fracture at the transition radius between the mounting surface and the swing arm body, thereby improving the overall structural strength and fatigue resistance of the suspension system.

[0024] This embodiment also provides a vehicle comprising a frame and a suspension system. The suspension system is mounted on the frame and between the axles and the frame, with the components located in front of the front wheels and behind the rear wheels. The swing arm structure ensures a more balanced force transmission path to the swing arm body, avoiding the risk of fracture at the rounded corner where the mounting surface transitions to the swing arm body. This improves the overall structural strength and fatigue resistance of the suspension system, enabling it to better support the weight of the vehicle and cushion road impacts, thereby maintaining vehicle stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a swing arm structure provided by an embodiment of the present utility model;

[0026] Figure 2 An exploded schematic diagram of the swing arm structure provided in an embodiment of the present utility model.

[0027] Reference numerals:

[0028] 100, large shaft sleeve; 200, small shaft sleeve; 300, ball pin;

[0029] 1. Swing arm body;

[0030] 2. First connecting arm; 21. Card interface;

[0031] 3. Second connecting arm;

[0032] 4. Third connecting arm; 41. Connecting hole; 42. Connecting portion; 421. Reinforcement rib; 43. Recessed portion;

[0033] 5. Flanging;

[0034] 6. Reinforcement member; 61. Through hole; 62. Welding portion; 63. Avoidance portion;

[0035] 7. Connectors. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0037] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0040] like Figure 1-Figure 2As shown, in this embodiment, the swing arm structure includes a swing arm body 1, a connecting mechanism, a reinforcement member 6 and a connecting member 7. The connecting mechanism includes a first connecting arm 2, a second connecting arm 3 and a third connecting arm 4 provided on the swing arm body 1. The first connecting arm 2 is connected to the large shaft sleeve 100, the second connecting arm 3 is connected to the small shaft sleeve 200, and the third connecting arm 4 is connected to the ball pin 300. The third connecting arm 4 is provided with a connecting hole 41, and the outer edge of the third connecting arm 4 is provided with a flange 5. The reinforcement member 6 is a trapezoidal structure and is provided with a through hole 61. The connecting member 7 passes through the through hole 61 and the connecting hole 41 in sequence and is connected to the ball pin 300. Specifically, the swing arm body 1 is welded by two buckled stamped steel plates. The first connecting arm 2, the second connecting arm 3 and the third connecting arm 4 are provided on the swing arm body 1. The first connecting arm 2 is connected to the large shaft sleeve 100, the second connecting arm 3 is connected to the small shaft sleeve 200, and the third connecting arm 4 is connected to the ball pin 300. A trapezoidal reinforcement member 6 is provided at the position of the third connecting arm 4. The connecting member 7 is a bolt that passes through the through hole 61 of the reinforcement member 6 and the connecting hole 41 of the third connecting arm 4 in sequence and is fixed to the ball pin 300. That is, under the action of the connecting member 7, the trapezoidal reinforcement member 6 and the ball pin 300 are respectively fixed to the mounting surfaces on both sides of the third connecting arm 4, thereby increasing the rigidity of the mounting surface of the third connecting arm 4 and distributing the force to the entire mounting surface. The outer edge of the third connecting arm 4 is provided with a flange 5, which is semi-enclosed around the reinforcement plate, playing a role in dispersing stress. The path of force transmission to the swing arm body 1 is more balanced, avoiding the risk of fracture at the transition radius from the mounting surface to the swing arm body 1, improving the overall structural strength and fatigue resistance, and having a certain degree of reliability and safety.

[0041] Further, continue to refer to Figure 1-Figure 2 The flange 5 is a U-shaped structure. Specifically, the flange 5 is integrally formed with the third connecting arm 4, providing high structural strength and resistance to breakage. The flange 5 is protruding from the outer edge of the third connecting arm 4 and semi-enclosed around the reinforcement sheet, thus dispersing stress and ensuring a more balanced force transmission path to the swing arm body 1. This avoids the risk of breakage at the transition fillet between the mounting surface and the swing arm body 1, thereby improving the overall structural strength and fatigue resistance.

[0042] Further, continue to refer to Figure 1-Figure 2The third connecting arm 4 includes a connecting portion 42 and a recessed portion 43. One end of the connecting portion 42 is connected to the swing arm body 1, and the other end of the connecting portion 42 is connected to the recessed portion 43. One side of the recessed portion 43 abuts against the reinforcement 6, and the other side of the recessed portion 43 abuts against the connecting end of the ball pin 300. Specifically, the recessed portion 43 is provided on the swing arm body 1 through the connecting portion 42. The connecting portion 42 has two reinforcing ribs 421. The two reinforcing ribs 421 are provided in the recessed portion 43, and the two reinforcing ribs 421 abut against the two ends of the flange 5 respectively. Force can be transmitted along the path of the reinforcing ribs 421 and the connecting portion 42, so that the force is dispersed to the entire mounting surface, avoiding the risk of fracture at the transition fillet between the mounting surface and the swing arm body 1, and improving the overall structural strength.

[0043] Further, continue to refer to Figure 1-Figure 2 The reinforcement 6 includes two welded portions 62 and a relief portion 63. The two welded portions 62 are welded to the flange 5, and the relief portion 63 is located between the two welded portions 62 and spaced apart from the flange 5. Specifically, the reinforcement 6 is welded to the flange 5 via the welded portions 62, further enhancing the structural strength and fatigue resistance between the reinforcement 6 and the third connecting arm 4. The relief portion 63 has an arc-shaped structure, which not only enhances the structural toughness and strength between the two welded portions 62 but also achieves a certain lightweighting effect, reducing the manufacturing cost of the reinforcement 6.

[0044] Further, continue to refer to Figure 1-Figure 2 The first connecting arm 2 is provided with a snap-in interface 21 having an arc-shaped structure, the inner circumferential wall of which is fixedly connected to the outer circumference of the large shaft sleeve 100. Specifically, the first connecting arm 2 is connected to the large shaft sleeve 100 via the arc-shaped snap-in interface 21. Compared with the traditional fully enclosed structure, the connection between the first connecting arm 2 and the outer circumference of the large shaft sleeve 100 is a semi-enclosed connection structure. This simplifies the structure and process while ensuring the connection strength, and also plays a role in reducing the weight of the structure.

[0045] This embodiment also provides a suspension system comprising a suspension body and a swing arm structure connected to the suspension body. Specifically, the swing arm structure is a lower swing arm located at the bottom of the suspension system, primarily connecting the wheel bearings and the suspension body. The suspension system is installed between the axle and the vehicle frame and includes components such as a shock absorber assembly, a lower swing arm, and springs. The springs connect the vehicle body and wheels to bear the weight of the vehicle body and provide support. The shock absorbers absorb impact and vibration from the road, improving ride comfort. The swing arm structure transmits power from the frame to the wheels. The third connecting arm 4 of the swing arm structure is provided with a flange 5 and a reinforcement 6. This increases the rigidity of the mounting surface of the third connecting arm 4, distributing force across the entire mounting surface, thereby distributing stress. This provides a more balanced path for force transmission to the swing arm body 1, reducing the risk of fracture at the rounded corner where the mounting surface transitions to the swing arm body 1, and improving the overall structural strength and fatigue resistance of the suspension system.

[0046] This embodiment also provides a vehicle comprising a frame and a suspension system, wherein the suspension system is mounted on the frame. Specifically, the suspension system is mounted between the axle and the frame, with its components located in front of the vehicle's front wheels and behind its rear wheels. The swing arm structure provides a more balanced path for force transmission to the swing arm body 1, avoiding the risk of fracture at the rounded corner where the mounting surface transitions to the swing arm body 1. This improves the overall structural strength and fatigue resistance of the suspension system, enabling it to better support the weight of the vehicle body, cushion road impacts, and maintain vehicle stability.

[0047] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The swing arm structure is characterized by: include: Swing arm body (1); A connecting mechanism, comprising a first connecting arm (2), a second connecting arm (3), and a third connecting arm (4) arranged on the swing arm body (1), wherein the first connecting arm (2) is connected to the large shaft sleeve (100), the second connecting arm (3) is connected to the small shaft sleeve (200), and the third connecting arm (4) is connected to the ball pin (300), the third connecting arm (4) is provided with a connecting hole (41), and the outer edge of the third connecting arm (4) is provided with a flange (5); A reinforcement member (6), wherein the reinforcement member (6) has a trapezoidal structure and is provided with a through hole (61); A connecting member (7), the connecting member (7) sequentially passes through the through hole (61) and the connecting hole (41) and is connected to the ball pin (300).

2. The swing arm structure according to claim 1, characterized in that: The flange (5) is in a U-shaped structure.

3. The swing arm structure according to claim 1, characterized in that: The flange (5) and the third connecting arm (4) are integrally formed.

4. The swing arm structure according to claim 1, characterized in that: The third connecting arm (4) comprises a connecting portion (42) and a recessed portion (43), one end of the connecting portion (42) is connected to the swing arm body (1), the other end of the connecting portion (42) is connected to the recessed portion (43), one side of the recessed portion (43) abuts against the reinforcement (6), and the other side of the recessed portion (43) abuts against the connecting end of the ball pin (300).

5. The swing arm structure according to claim 4, characterized in that: The connecting portion (42) has two reinforcing ribs (421), the two reinforcing ribs (421) are arranged in the recessed portion (43), and the two reinforcing ribs (421) respectively abut against two ends of the flange (5).

6. The swing arm structure according to claim 1, characterized in that: The reinforcement (6) comprises two welding portions (62), and the two welding portions (62) are welded and fixed to the flange (5).

7. The swing arm structure according to claim 6, characterized in that: The reinforcement member (6) further includes an avoidance portion (63), the avoidance portion (63) being located between the two welding portions (62), and the avoidance portion (63) being spaced apart from the flange (5).

8. The swing arm structure according to claim 1, characterized in that: The first connecting arm (2) is provided with a card interface (21), the card interface (21) is in an arc-shaped structure, and the inner peripheral wall of the card interface (21) is fixedly connected to the outer periphery of the large shaft sleeve (100).

9. Suspension system, characterized in that, It comprises a suspension body and a swing arm structure according to any one of claims 1 to 8, wherein the swing arm structure is connected to the suspension body.

10. A vehicle, characterized in that The vehicle comprises a vehicle frame and the suspension system according to claim 9, wherein the suspension system is arranged on the vehicle frame.

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