A novel guide arm assembly

Abstract

The utility model provides a novel guide arm assembly, including first guide arm, the lower part of first guide arm is provided with second guide arm, and one end of first guide arm and second guide arm all is provided with the ear end of rolling, and the ear end of rolling of second guide arm is set in the ear end of rolling of first guide arm outside, forms double -deck structure, and the ear end of rolling and guide arm whole's structural strength is strengthened through double -deck structure, and the extension length of one end of first guide arm away from the ear end of rolling is greater than the extension length of one end of second guide arm away from the ear end of rolling to form the stepped guide arm, the utility model discloses the ear end of rolling of first guide arm, second guide arm, and the ear end of rolling of the ear end of rolling set form double -deck structure, promote the ear end of rolling bending shear capacity, reduce the risk of deformation fracture, stepped design optimization force transmission, avoid stress concentration, double -deck structure reduces the thickness of sheet material under the premise of guaranteeing the strength, realizes light weight, simplifies the process and reduces the cost.

Description

Technical Field

[0001] This utility model relates to the field of guide arm technology, and specifically to a novel guide arm assembly. Background Technology

[0002] The guide arm is a key component of the trailer air spring suspension system. Its main function is to connect the wheels and the frame, transmit all forces and torques, and make the wheels run along a certain trajectory, thus guiding the axle. Its main elastic elements are the air spring and the guide arm, which also plays a guiding role. Among them, the Z-type single-piece guide arm is the most widely used.

[0003] Currently, the Z-type single-piece guide arm has become the most widely used technical solution in trailer suspension systems at home and abroad due to its simple and efficient spatial configuration. Through the Z-shaped bending design, a unique force transmission path is formed, which can meet the longitudinal guiding stiffness requirements and also take into account the lateral anti-roll performance.

[0004] However, to meet strength requirements, traditional single-piece Z-shaped guide arms typically require steel plates with a thickness of around 56mm. This presents significant challenges in rolling (where strict control of the internal structure of the plate is necessary to prevent thickness tolerances from exceeding limits), forming (where plastic deformation of thick steel plates is difficult during bending, easily leading to stress concentration or exceeding dimensional tolerances at the bending point), and heat treatment quality (where the large cross-sectional dimensions make it difficult to ensure uniform quenching and cooling, easily resulting in deformation or residual internal stress). These processes place extremely high demands on equipment precision and process parameter control, significantly increasing manufacturing complexity and cost. Furthermore, the large thickness of traditional single-piece Z-shaped guide arms results in a substantial overall weight, making it difficult to meet current market demands for lightweight designs. Utility Model Content

[0005] In view of this, the present invention provides a novel guide arm assembly, which can form a double-layer structure by sleeved with the rolled ear end and the wrapped ear end of the first guide arm and the second guide arm, thereby improving the bending and shearing resistance of the rolled ear and reducing the risk of deformation and breakage; the stepped design optimizes force transmission and avoids force concentration; the double-layer structure reduces the thickness of the sheet metal while ensuring strength, thereby achieving lightweight, simplifying the process and reducing costs.

[0006] To solve the above-mentioned technical problems, this utility model provides a novel guide arm assembly, including a first guide arm and a second guide arm disposed at the lower part of the first guide arm. The first guide arm and the second guide arm are used to connect the tow frame, the axle and the airbag.

[0007] One end of the first guide arm is fixedly connected to a rolled ear end, and one end of the second guide arm is fixedly connected to a covered ear end. The covered ear end of the second guide arm is sleeved outside the rolled ear end of the first guide arm, forming a double-layer structure. The double-layer structure enhances the overall structural strength of the rolled ear end, the covered ear end, and the guide arm.

[0008] The extension length of the first guide arm away from the end of the coiled lug is greater than the extension length of the second guide arm away from the end of the wrap-around lug, so as to form a stepped guide arm and optimize the force transmission path between the axle and the airbag.

[0009] Both the first guide arm and the second guide arm have a mounting plate (the two mounting plates are fitted together) for mounting on the axle. The mounting plate is connected to the lug end by a first connecting plate, which is set in a V-shape to adapt to the forces generated during vehicle movement and improve structural strength.

[0010] The first connecting plate is designed with an arc-shaped structure. By reducing stress concentration through the radius of curvature, the force distribution becomes more uniform, and the fatigue resistance is improved.

[0011] A second connecting plate is provided at the extension end of the mounting plate away from the ear end. The second connecting plate is a flat plate structure, which enhances the end connection strength through a planar bonding method.

[0012] Both the connection between the first connecting plate and the mounting plate, and the connection between the second connecting plate and the mounting plate, are provided with arc-shaped transition sections to eliminate right-angle structures and make the force distribution more uniform.

[0013] A gap is reserved between the arc-shaped transition sections on the first guide arm and the second guide arm.

[0014] The mounting plates of the first guide arm and the second guide arm are connected by bolts to achieve detachable fixing of the first guide arm and the second guide arm.

[0015] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0016] 1. Support and guidance function: As an important component connecting the tow frame, axle and airbag, the arc height design of the guide arm at its rolled end directly affects the support and guidance of the airbag; the guide arm needs to be able to withstand the vertical, longitudinal and lateral forces of the vehicle during driving to ensure that the airbag can work normally under different road conditions and provide stable support and guidance.

[0017] 2. Mechanical environment adaptability: The design of the guide arm needs to have excellent elasticity to cope with complex mechanical environments; the arc height design of the ear end can help the guide arm better adapt to various forces generated during vehicle driving, ensuring that the airbag can remain stable under different loads and road conditions, and reducing the risk of airbag damage or failure due to changes in the mechanical environment.

[0018] 3. Installation accuracy and performance: The arc height design of the rolled ear end is crucial to the installation accuracy and performance of the guide arm. A precise arc height design ensures a tighter fit between the guide arm and the airbag after installation, reducing installation errors and improving the overall performance of the system. For example, in the drilling of positioning holes, the application of a special mold can ensure that the distance tolerance between the two positioning holes is controlled within ±1mm, which is crucial for the installation and performance of the guide arm.

[0019] 4. Innovative Measuring Tools: To ensure accurate measurement of the airbag's lug height, an auxiliary positioning plate and right-angle ruler are used, greatly meeting the requirements of on-site production. This results in minimal measurement error and convenient, quick operation. The use of these tools ensures accurate measurement of the airbag's lug height, thereby guaranteeing the airbag's performance after installation.

[0020] 5. Sorting and Marking: The arc height of the guide arm needs to be sorted according to requirements to improve the stability of the whole vehicle. A counting-type guide arm arc height sorting tool is used to sort and mark the airbag by setting a counting-type arc height sorting bar and the inner bushing hole of the ear. The counting-type arc height sorting bar is inserted into the inner bushing hole of the ear, and the contact position between the counting-type arc height sorting bar and the bushing is visually inspected. The operation is simple and efficient. This sorting method can ensure the accurate sorting of the arc height of the ear end, thereby ensuring the stability and reliability of the airbag under different working conditions.

[0021] 6. Enhanced Structural Strength and Reliability: The double-layer structure formed by the rolled and wrapped ends of the first and second guide arms effectively improves the bending and shear resistance of the rolled and wrapped parts. Especially in complex road sections, it can reduce the deformation and breakage risk of the rolled ends, significantly enhancing the overall structural strength and reliability of the guide arms. The stepped guide arm design (the extension length of the first guide arm is greater than that of the second guide arm) optimizes the force transmission path between the axle and the airbag, allowing the load to be transmitted step by step through the double-layer rolled and wrapped ends, avoiding stress concentration in a single part and reducing local overload problems.

[0022] 7. Optimized force distribution and fatigue resistance: The first connecting plate adopts an arc-shaped structure. The curvature radius design reduces stress concentration, so that the loads such as vibration, impact and torque generated during vehicle operation are evenly distributed along the arc. The force transmission is more uniform, which effectively improves the fatigue resistance of the guide arm and extends its service life.

[0023] 8. Arc-shaped transition section to optimize force transmission path: Arc-shaped transition sections are set at the connection between the mounting plate and the first connecting plate and the second connecting plate to eliminate stress concentration points caused by right angle structures. The smooth curvature makes the force transmission path smoother, further disperses stress, and reduces the risk of structural failure.

[0024] 9. Improved connection stability and assembly convenience: The second connecting plate adopts a flat plate structure, which enhances the end connection strength through planar bonding, avoiding failure due to weak connection, and ensuring stable connection between the guide arm and components such as the traction frame. The mounting plates of the first guide arm and the second guide arm are connected by bolts to achieve detachable fixing. This not only facilitates the adjustment of the relative position of the two during assembly (such as fit, angle, etc.) to ensure consistent force lines and avoid uneven force distribution, but also facilitates later maintenance and replacement.

[0025] 10. Reserved deformation space and avoid rigid interference: A gap is reserved between the arc transition sections on the first guide arm and the second guide arm to avoid rigid interference between the two when they are deformed under force, providing a buffer space for deformation, further improving the reliability of the structure and reducing structural damage caused by mutual compression.

[0026] 11. Lightweighting and process optimization: Compared with the traditional single-piece Z-shaped guide arm (the steel plate thickness is usually around 56mm), this utility model, through a double-layer structure design, can appropriately reduce the thickness of a single plate (such as the thickness of the second connecting plate in the embodiment is 28mm) while ensuring strength, thereby reducing the overall weight and meeting the market demand for lightweighting. At the same time, it simplifies the difficulty of rolling, forming, heat treatment and other processes, reducing manufacturing complexity and cost. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the overall structure of the other side of this utility model;

[0029] Figure 3 This is a schematic diagram of the overall front view of the present invention.

[0030] In the diagram: 100, First guide arm; 101, Mounting plate; 102, First connecting plate; 103, Second connecting plate; 104, Rolled end; 105, Wrapped end;

[0031] 200. Second guide arm;

[0032] 301. Arc-shaped transition section;

[0033] 401. Bolt. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-3The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0035] A new type of guide arm assembly, such as Figure 1 , 2 As shown: It includes a first guide arm 100, and a second guide arm 200 is provided at the lower part of the first guide arm 100. The first guide arm 100 and the second guide arm 200 are used to connect the tow frame, the axle and the airbag.

[0036] One end of the first guide arm 100 is fixedly connected to a rolled ear end, and one end of the second guide arm 200 is fixedly connected to a covered ear end 105. The covered ear end 105 of the second guide arm 200 is sleeved outside the rolled ear end 104 of the first guide arm 100, forming a double-layer structure. The double-layer structure enhances the structural strength of the rolled ear end 104, the covered ear end 105 and the guide arm as a whole, and further enhances the overall structural strength of the guide arm through the first guide arm 100 and the second guide arm 200.

[0037] The double-layer structure effectively improves the bending and shearing resistance of the coiled and wrapped parts, especially in complex road sections, it can reduce the risk of deformation and breakage of the coiled end 104 and the wrapped end 105, and enhance the overall structural reliability of the guide arm.

[0038] The first guide arm 100 and the second guide arm 200 can withstand the vertical, longitudinal and lateral forces of the vehicle during driving, ensuring that the airbag can work normally under different road conditions and provide stable support and guidance.

[0039] like Figure 1 , 2 As shown: the extension length of the first guide arm 100 away from the end of the coiled ear 104 is greater than the extension length of the second guide arm 200 away from the end of the wrapped ear 105, so as to form a stepped guide arm and optimize the transmission path between the axle and the airbag.

[0040] The longer first guide arm 100 can first bear the main load (such as the vehicle's own weight and the weight of the cargo, the reaction force of the airbag support, etc.), and then transmit it to the second guide arm 200 through the double-layer rolled ear end 104 and the wrapped ear end 105, so as to avoid the force being concentrated in a single part, thereby optimizing the force transmission efficiency between the towing frame, the axle and the airbag, and reducing local overload.

[0041] like Figure 2 , 3As shown: Both the first guide arm 100 and the second guide arm 200 have a mounting plate 101 (the two mounting plates 101 are fitted together) for mounting on the axle. The mounting plate 101 and the ear end 104 are connected by a first connecting plate 102. The first connecting plate 102 is set as a V-shaped structure to adapt to the forces generated during vehicle movement and improve structural strength.

[0042] Furthermore, the first connecting plate 102 is configured as an arc-shaped structure. By reducing stress concentration through the radius of curvature, the force distribution becomes more uniform, improving fatigue resistance. That is, the generated force can be evenly distributed along the arc, avoiding stress concentration caused by right-angle structures. During vehicle operation, the guide arm as a whole bears the loads (such as vibration, impact, torque, etc.) from the axle, airbag, and road surface. The arc-shaped structure disperses the force distribution, making the force transmission more uniform and reducing the risk of local overload.

[0043] like Figure 2 , 3 As shown: The extension end of the mounting plate 101 away from the ear end 104 is provided with a second connecting plate 103 (the extension end of the mounting plate 101 is the second connecting plate 103). The second connecting plate 103 is set as a flat plate structure. By using a planar bonding method, the stability of the end connection is improved and the strength of the end connection is enhanced, avoiding failure problems caused by weak connection.

[0044] In this embodiment, two mounting holes are provided on the second connecting plate 103 at one end of the first guide arm 100. The mounting holes are used to mount the first guide arm 100 on the traction frame.

[0045] like Figure 2 , 3 As shown: the connection between the first connecting plate 102 and the mounting plate 101, and the connection between the second connecting plate 103 and the mounting plate 101 are both provided with arc-shaped transition sections to eliminate right-angle structures and make the force distribution more uniform.

[0046] Because right-angled structures are prone to stress concentration points when subjected to force, leading to premature fatigue or fracture of local materials. In contrast, the arc-shaped transition section 301 replaces right angles with smooth curvature, making the force transmission path smoother, thereby dispersing stress distribution, avoiding local stress overload, and significantly reducing the risk of structural failure.

[0047] Furthermore, a gap is reserved between the arc-shaped transition section 301 of the first guide arm 100 and the second guide arm 200 to avoid rigid interference when they are deformed under stress, thereby further improving the reliability of the structure. In addition, a certain deformation space can be reserved when the first guide arm 100 and the second guide arm 200 deform, so as to avoid mutual compression during the deformation process, thereby further improving the overall reliability of the guide arm structure.

[0048] like Figure 1 , 2 As shown in Figure 3, the first guide arm 100 and the second guide arm 200 are connected at the mounting plate 101 by bolts 401 to achieve detachable fixing of the first guide arm 100 and the second guide arm 200. The bolt 401 connection allows the relative position of the first guide arm 100 and the second guide arm 200 to be adjusted during the assembly process (such as the fit of the mounting plate 101, the angle of the guide arm, etc.) to ensure that the force lines of the two are consistent when subjected to force, and to avoid misalignment, uneven force, etc. due to assembly deviation.

[0049] In this embodiment, the thickness of the second connecting plate 103 is set to 28mm, and the arc height of the rolled ear end 104 is 110mm, which can help the guide arm better adapt to various forces during vehicle driving, ensure that the airbag can remain stable under different loads and road conditions, and reduce the risk of airbag damage or failure caused by changes in the mechanical environment.

[0050] The guide arm as a whole needs to bear the vertical, longitudinal and lateral forces of the vehicle during driving to ensure that the airbag can work normally under different road conditions and provide stable support and guidance.

[0051] To ensure accurate measurement of the 104 arc height at the air intake end, an auxiliary positioning plate and right-angle ruler are used. This greatly satisfies the requirements of on-site production, minimizes measurement errors, and is convenient and quick to operate. The use of this tool ensures accurate measurement of the 104 arc height at the air intake end, thereby guaranteeing the performance of the airbag after installation.

[0052] The chord length of the first guide arm 100 (i.e., the distance from the center of the coiled end 104 to the end of the second connecting plate 103) is 1060mm. The chord length from the center of the coiled end 104 of the first guide arm 100 to the position of the bolt 401 is 558±5mm. The chord length from the bolt 401 to the first mounting hole on the second connecting plate 103 is 278±1mm. The distance from the bolt 401 to the end of the mounting plate 101 near the coiled end 104 is 120mm. The distance from the bolt 401 to the end of the mounting plate 101 near the second connecting plate 103 is 115mm. The straight-line distance between the arc transition section 301 of the second connecting plate 103 and the mounting plate 101 is 100mm, and the height is 47±2mm. The width of both the first guide arm 100 and the second guide arm 200 is 90mm, and the length of the coiled end 104 is 92±0.2mm.

[0053] In summary, the new guide arm product of this project, a guide arm with a rolled ear end and arc height, mainly functions in terms of support and guidance, mechanical environmental adaptability, installation accuracy and performance, innovative measuring tools, and sorting and marking. These design and process optimizations can ensure the stability and reliability of the airbag in the air suspension system, improve the vehicle's driving performance and ride comfort, and solve the problems of low precision, high energy consumption, poor adaptability, high maintenance costs, and inability to adapt to complex working conditions of traditional guide arms.

[0054] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A novel guide arm assembly, characterized in that: It includes a first guide arm (100), and a second guide arm (200) is provided at the lower part of the first guide arm (100); One end of the first guide arm (100) is provided with a rolled ear end (104), and one end of the second guide arm (200) is provided with a covered ear end (105). The covered ear end (105) of the second guide arm (200) is sleeved outside the rolled ear end (104) of the first guide arm (100), forming a double-layer structure. The double-layer structure enhances the structural strength of the rolled ear end (104), the covered ear end (105) and the guide arm as a whole. The extension length of the first guide arm (100) away from the ear end (104) is greater than the extension length of the second guide arm (200) away from the ear end (105) to form a stepped guide arm.

2. The novel guide arm assembly as described in claim 1, characterized in that: Both the first guide arm (100) and the second guide arm (200) have a mounting plate (101) for mounting on the axle; The mounting plate (101) and the rolled ear end (104) are connected by a first connecting plate (102). The first connecting plate (102) is set with a V-shaped structure to adapt to the forces generated during vehicle operation and improve structural strength.

3. The novel guide arm assembly as described in claim 2, characterized in that: The first connecting plate (102) is set as an arc-shaped structure. By reducing stress concentration through the radius of curvature, the force distribution is more uniform and the fatigue resistance is improved.

4. The novel guide arm assembly as described in claim 2, characterized in that: The mounting plate (101) is provided with a second connecting plate (103) at the extension end away from the ear end (104). The second connecting plate (103) is configured as a flat plate structure, which enhances the end connection strength through a planar bonding method.

5. The novel guide arm assembly as described in claim 4, characterized in that: Arc-shaped transition sections (301) are provided at the connection between the first connecting plate (102) and the mounting plate (101) and at the connection between the second connecting plate (103) and the mounting plate (101) to eliminate right-angle structures and make the force distribution more uniform.

6. The novel guide arm assembly as described in claim 5, characterized in that: A gap is reserved between the arc-shaped transition sections on the first guide arm (100) and the second guide arm (200).

7. The novel guide arm assembly as described in claim 6, characterized in that: The mounting plates (101) of the first guide arm (100) and the second guide arm (200) are connected by bolts (401) to achieve detachable fixing of the first guide arm (100) and the second guide arm (200).

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