Narrow track leaf spring suspension structure and vehicle

Abstract

The utility model provides a narrow wheel track leaf spring suspension structure and vehicle belong to leaf spring suspension technical field, and the leaf spring suspension structure includes leaf spring assembly, and one end of leaf spring assembly is hinged with front support, and the other end is fixedly connected with rear support, and front support and rear support are all fixedly installed on the frame through bolts, and leaf spring assembly is located below the frame, and main spring sliding block is detachably installed in rear support, and main spring sliding block is in abutment with leaf spring assembly, and the bottom of frame is fixedly installed with auxiliary spring sliding block, and auxiliary spring sliding block is located directly above leaf spring assembly. Leaf spring assembly is adjusted from the outside of frame to below the frame, which avoids the conflict of fixed point position when the axle translates inward, and the cooperation of main spring sliding block and auxiliary spring sliding block can form stable limiting for leaf spring assembly, ensure that leaf spring assembly can still maintain reliable supporting performance below the frame, provide sufficient space for the inward translation of axle, thereby realize the effective reduction of wheel track to adapt to the demand of narrow wheel track vehicle model.

Description

Technical Field

[0001] This utility model relates to the field of leaf spring suspension technology, and in particular to a narrow wheelbase leaf spring suspension structure and vehicle. Background Technology

[0002] Leaf springs are a key component in the suspension system of commercial vehicles. They are mainly used to connect the frame and the axle. During vehicle operation, the leaf springs absorb vibrations from the road surface through elastic deformation. When encountering vertical loads, each leaf spring bends together, allowing the axle and frame to move closer or further away from each other according to road conditions, thereby achieving shock absorption and support, and ensuring a smooth ride.

[0003] The existing leaf spring suspension is a left and right external leaf spring suspension (such as publication number CN118124314A). The two ends of the leaf spring assembly are connected to the bracket, and the bracket is fixedly installed on the outside of the vehicle frame by bolts so that the leaf spring assembly is set on the outside of the vehicle frame.

[0004] In existing commercial vehicles, the leaf spring suspension is located on the outside of the frame. When it is necessary to reduce the wheel track, the axle needs to be moved inward. However, the movement of the axle will conflict with the fixing point of the leaf spring, which restricts the movement space of the tires inward, making it difficult to effectively reduce the wheel track and failing to meet the layout requirements of narrow wheel track models. Utility Model Content

[0005] To address the technical problem in the background art where existing commercial vehicle leaf spring suspensions are located on the outer side of the vehicle frame, limiting the movement space of the tires towards the inner side of the vehicle frame, thus making it difficult to effectively reduce the wheelbase and meet the layout requirements of narrow wheelbase models, this utility model provides a narrow wheelbase leaf spring suspension structure and vehicle.

[0006] The technical solution of this utility model is as follows: This utility model provides a narrow-track leaf spring suspension structure, including: a leaf spring assembly, one end of which is hinged to a front support, and the other end is fixedly connected to a rear support. Both the front and rear supports are bolted to the vehicle frame. The leaf spring assembly is located below the vehicle frame. A main spring slider is detachably installed inside the rear support, abutting against the leaf spring assembly. A secondary spring slider is fixedly installed at the bottom of the vehicle frame, located directly above the leaf spring assembly. The leaf spring assembly is adjusted from the outside of the vehicle frame to below it, avoiding conflict with the fixed points during the inward translation of the axle. The cooperation between the main and secondary spring sliders provides stable limiting for the leaf spring assembly, ensuring reliable support performance even below the vehicle frame. This provides ample space for the axle to translate inward, effectively reducing the track width to suit narrow-track vehicle requirements. Simultaneously, the cooperation between the main and secondary spring sliders controls the installation height of the leaf spring assembly, effectively reducing the rear axle height of the commercial vehicle and allowing for a more optimized vehicle posture.

[0007] Preferably, the leaf spring assembly includes a main spring and a secondary spring. The secondary spring is positioned above the main spring, with an upper cover plate above the secondary spring and a lower cover plate below the main spring. The upper and lower cover plates are connected by U-bolts. The combined structure of the main spring and the secondary spring can improve the overall load-bearing capacity and elastic performance of the leaf spring assembly. The upper and lower cover plates are fastened together by U-bolts, which can firmly attach the main spring and the secondary spring into one unit, ensuring that they deform synchronously when subjected to force, avoiding local wear caused by relative displacement, thereby maintaining the stability of the suspension structure and providing load-bearing guarantee for reliable operation after the inner side of the axle is translated.

[0008] Preferably, there are two auxiliary spring sliders, which are positioned directly above both ends of the auxiliary spring to limit the reverse flex of the auxiliary spring and prevent interference between the auxiliary spring and the lower wing surface of the frame.

[0009] Preferably, the front end of the main spring is rotatably connected to the front support via a pin, and the rear end of the main spring is inserted into the rear support, with the upper surface of the rear end of the main spring abutting against the lower surface of the main spring slider. The rotatable connection of the front end of the main spring to the front support via the pin provides flexible deformation space for the leaf spring assembly. The structure of the rear end being inserted into the rear support and abutting against the main spring slider not only ensures reliable positioning of the rear end of the main spring but also distributes the force through the supporting effect of the main spring slider, preventing damage to the rear end of the main spring due to concentrated force. This ensures the long-term reliability of the suspension structure and provides support for the long-term stability of narrow wheelbase configurations.

[0010] Preferably, two adjusting shims are detachably installed inside the rear support. The two adjusting shims are positioned opposite each other on both sides of the main spring, and the spacing can be flexibly adjusted according to the actual width of the main spring to ensure precise lateral limiting of the main spring and prevent lateral movement of the main spring during operation. At the same time, the detachable design facilitates the replacement of shims according to wear during later maintenance, maintains the limiting effect on the main spring, and ensures the stability of the axle position to maintain the reduced wheelbase.

[0011] Preferably, the rear support includes an L-shaped fixing part, which is fixedly connected to the vehicle frame. Two opposing connecting lugs are fixedly mounted on the bottom of the fixing part. The adjusting shim, main spring slider, and main spring are all installed between the two connecting lugs. The lower ends of the connecting lugs are connected by connecting bolts, with the main spring positioned above the connecting bolts. The L-shaped fixing part ensures a secure connection between the rear support and the vehicle frame. The frame structure formed by the two connecting lugs and the connecting bolts provides stable installation space for the adjusting shim, main spring slider, and main spring. The main spring's placement above the connecting bolts, combined with the support of the main spring slider, ensures the suspension's load-bearing stability.

[0012] Preferably, the adjusting shim includes a triangular shim body, with two opposing limiting parts fixedly provided on the top of the shim body, and a through hole opened at the lower end of the shim body. The connecting bolt is installed in the through hole. The triangular shim body can withstand the lateral force of the main spring and achieve lateral limiting of the main spring through precise spacing adjustment. The top limiting part forms a reliable longitudinal fixation for the main spring slider, preventing the main spring slider from moving longitudinally.

[0013] Preferably, the upper surface of the main spring slider is U-shaped, and the lower surface of the main spring slider is arc-shaped. The U-shaped structure of the upper surface of the main spring slider is adapted to the interior of the rear support to ensure stable installation and maintain accurate support position. The arc-shaped surface of the lower surface contacts the upper surface of the rear end of the main spring, which can reduce frictional resistance when the main spring deforms, so that the main spring can deform smoothly while always maintaining stable contact and support with the main spring slider, ensuring the stability of the height adjustment of the leaf spring assembly and helping the rear axle to be lowered smoothly.

[0014] Preferably, the upper surface of the auxiliary spring slider is flat, and the lower surface of the auxiliary spring slider is arc-shaped. The flat structure of the upper surface of the auxiliary spring slider fits tightly with the bottom of the frame, ensuring its own stability and accurate support height. The arc-shaped surface of the lower surface contacts the upper surface of the auxiliary spring, which can reduce friction loss when the auxiliary spring deforms. This allows the auxiliary spring to maintain stable elastic performance while working with the main spring slider to maintain the height stability of the leaf spring assembly, ensuring the smooth lowering of the rear axle.

[0015] A vehicle includes a narrow-track leaf spring suspension structure, which can effectively reduce the track width by rationally arranging the leaf spring components to meet the requirements of narrow track width arrangement. It can also reduce the rear axle by means of the synergistic action of the main spring slider and the auxiliary spring slider, so that the commercial vehicle can obtain a better body posture. At the same time, the suspension structure has reliable load-bearing performance and stability, ensuring driving comfort and safety, and expanding the vehicle's applicable scenarios, especially suitable for use environments with requirements for track width and body posture.

[0016] As can be seen from the above technical solutions, the advantages of this utility model are: The leaf spring assembly is moved from the outside of the frame to the bottom of the frame, avoiding conflict with the fixed point during the translation of the axle inside. The cooperation between the main spring slider and the auxiliary spring slider can provide stable limit for the leaf spring assembly, ensuring that the leaf spring assembly can still maintain reliable support performance under the frame. This provides sufficient space for the axle to translate inward, thereby achieving an effective reduction in wheelbase to adapt to the needs of narrow wheelbase models. At the same time, the cooperation between the main spring slider and the auxiliary spring slider can control the installation height of the leaf spring assembly, thereby effectively reducing the height of the rear axle of the commercial vehicle and allowing the commercial vehicle to be adjusted to a more optimal body posture. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of a narrow wheel track leaf spring suspension structure according to one or more embodiments of the present invention. Figure 2 This is a top view schematic diagram of a narrow wheel track leaf spring suspension structure according to one or more embodiments of the present invention; Figure 3 This is a partially enlarged structural diagram of the rear support assembly location according to one or more embodiments of the present invention. Figure 4 This is a schematic diagram of the structure of the adjusting shim according to one or more embodiments of the present invention; Figure 5 This is a structural schematic diagram of the rear support according to one or more embodiments of the present utility model; Figure 6 This is a schematic diagram of the auxiliary spring slider according to one or more embodiments of the present invention; Figure 7 This is a schematic diagram of the main spring slider according to one or more embodiments of the present invention; The components represented by the various reference numerals in the diagram are: 1. Frame; 2. Front support; 3. Pin; 4. Main spring; 5. Secondary spring; 6. Lower cover plate; 7. Axle; 8. Adjusting shim; 81. Shim body; 82. Limiting part; 83. Through hole; 9. Rear support; 91. Fixing part; 92. Connecting lug; 93. First bolt hole; 94. Second bolt hole; 95. Third bolt hole; 10. Secondary spring slider; 101. Fourth bolt hole; 11. Upper cover plate; 12. Connecting bolt; 13. Main spring slider; 131. Fifth bolt hole; 14. U-bolt. Detailed Implementation

[0019] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0020] Example 1 In a typical embodiment of this utility model, such as Figures 1-7 As shown, a narrow-track leaf spring suspension structure is proposed, including: a front support 2, a leaf spring assembly, a rear support 9, a secondary spring slider 10, and a primary spring slider 13. The front support 2 and the rear support 9 are both fixedly mounted on the frame 1 by bolts, and both the front support 2 and the rear support 9 are located below the longitudinal beam of the frame 1. The front support 2 and the rear support 9 are arranged opposite each other along the length direction of the frame 1. One end of the leaf spring assembly is hinged to the front support 2, and the other end of the leaf spring assembly is inserted into the rear support 9, so that the entire leaf spring assembly is located below the frame 1. The primary spring slider 13 is detachably mounted in the rear support 9 and abuts against the leaf spring assembly to achieve a fixed connection between the leaf spring assembly and the rear support 9. The secondary spring slider 10 is fixedly mounted on the bottom of the frame 1 by bolts and is located directly above the leaf spring assembly to limit the reverse bow of the secondary spring 5 of the leaf spring assembly and avoid interference with the lower wing surface of the frame.

[0021] Since the leaf spring assembly is located entirely below the frame 1, it allows for greater flexibility for the tires to move inward, helping to reduce the track width, adapting to the needs of narrow track models, and reducing the lateral width of the vehicle body.

[0022] The leaf spring assembly includes a main spring 4 and a secondary spring 5. The secondary spring 5 is located above the main spring 4. An upper cover plate 11 is located above the secondary spring 5, and a lower cover plate 6 is located below the main spring 4. The upper cover plate 11 and the lower cover plate 6 are connected by U-bolts 14. With the use of U-bolts 14, the entire leaf spring assembly is connected to the axle 7.

[0023] Two auxiliary spring sliders 10 are provided. The two auxiliary spring sliders 10 are fixedly installed at the bottom of the frame 1 and located directly above the auxiliary spring 5. Specifically, the two auxiliary spring sliders 10 are respectively located directly above the two ends of the auxiliary spring 5 to realize the reverse bow limit of the auxiliary spring 5 and avoid interference between the two ends of the auxiliary spring 5 and the lower wing surface of the frame.

[0024] The auxiliary spring slider 10 has an arc-shaped block structure, specifically as follows: Figure 6 As shown, the upper surface of the auxiliary spring slider 10 is a plane, and the lower surface of the auxiliary spring slider 10 is an arc-shaped surface. The auxiliary spring slider 10 has a fourth bolt hole 101 for fixing to the bottom of the frame 1 by bolts. The upper surface of the auxiliary spring slider 10 contacts the lower surface of the frame 1, and the arc-shaped lower surface of the auxiliary spring slider 10 is used to contact the end of the auxiliary spring 5.

[0025] like Figure 1 As shown, the front end of the main spring 4 is rotatably connected to the front support 2 via the pin 3, and the rear end of the main spring 4 is inserted into the rear support 9. The upper surface of the rear end of the main spring 4 abuts against the lower surface of the main spring slider 13 in the rear support 9 to achieve a fixed connection between the rear end of the main spring 4 and the rear support 9.

[0026] like Figure 3As shown, the rear support 9 is detachably equipped with a main spring slider 13 and an adjusting shim 8. There are two adjusting shims 8, which are arranged opposite to each other on both sides of the main spring slider 13. At the same time, the two adjusting shims 8 are arranged opposite to each other on both sides of the main spring 4, thereby limiting the main spring slider 13 and the main spring 4 and preventing the main spring 4 from having too large a gap on the left and right sides, which would affect the stability.

[0027] like Figure 5 As shown, the rear support 9 includes a fixing part 91 and a connecting ear plate 92. The fixing part 91 has an L-shaped structure for fixed connection with the frame 1. There are two connecting ear plates 92, which are fixedly disposed at the bottom of the fixing part 91. The fixing part 91 and the connecting ear plates 92 are integrally formed. The fixing part 91 includes a horizontal section and a vertical section. A first bolt hole 93 is provided on the vertical section, and a second bolt hole 94 is provided on the horizontal section for bolt installation. The fixing part 91 is fixedly connected to the bottom and side of the frame 1 by bolts to improve the installation firmness of the rear support 9. The connecting ear plate 92 is fixedly disposed at the bottom of the horizontal section of the fixing part 91, and there is space between the two connecting ear plates 92 for installing the main spring 4. A third bolt hole 95 is provided at the lower end of the connecting ear plate 92 for installing the connecting bolt 12. The connecting bolt 12 supports and limits the bottom of the rear end of the main spring 4.

[0028] like Figure 7 As shown, the upper surface of the main spring slider 13 is U-shaped, the lower surface of the main spring slider 13 is arc-shaped, and a fifth bolt hole 131 is provided at the middle position of the main spring slider 13. The main spring slider 13 is located between two connecting ear plates 92, and the upper surface of the main spring slider 13 is inserted into the horizontal section of the fixing part 91 and fixed by bolts. The arc-shaped lower surface of the main spring slider 13 is used to abut against the end of the main spring 4. In conjunction with the use of the connecting bolt 12, the vertical direction of the end of the main spring 4 is limited.

[0029] like Figure 4 As shown, the adjusting shim 8 includes a shim body 81 and a limiting part 82. The shim body 81 has a triangular plate-shaped structure. There are two limiting parts 82, and the two limiting parts 82 are fixedly arranged on the top of the shim body 81 for insertion and limiting with the horizontal section of the fixing part 91. The lower end of the shim body 81 has a through hole 83, which is coaxially arranged with the third bolt hole 95 for the installation of the connecting bolt 12, thereby fixing the position of the adjusting shim 8. The two adjusting shims 8 clamp and limit the left and right sides of the main spring 4.

[0030] Example 2 In another typical embodiment of this utility model, a vehicle is proposed, including: a narrow track leaf spring suspension structure, a frame 1 and an axle 7. The narrow track leaf spring suspension structure is fixedly installed on the frame 1 by bolts and is located below the longitudinal beam of the frame 1. The axis of the axle 7 is perpendicular to the axis of the frame 1. The axle 7 is fixedly connected to the two narrow track leaf spring suspension structures above it by U-bolts 14. The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A narrow-track leaf spring suspension structure, comprising: The leaf spring assembly is characterized in that a front support (2) is hinged to one end of the leaf spring assembly and a rear support (9) is fixedly connected to the other end. Both the front support (2) and the rear support (9) are fixedly installed on the frame (1) by bolts. The leaf spring assembly is located below the frame (1). A main spring slider (13) is detachably installed inside the rear support (9). The main spring slider (13) abuts against the leaf spring assembly. A secondary spring slider (10) is fixedly installed at the bottom of the frame (1). The secondary spring slider (10) is located directly above the leaf spring assembly.

2. The narrow-track leaf spring suspension structure according to claim 1, characterized in that, The leaf spring assembly includes a main spring (4) and a secondary spring (5). The secondary spring (5) is located above the main spring (4). An upper cover plate (11) is provided above the secondary spring (5), and a lower cover plate (6) is provided below the main spring (4). The upper cover plate (11) and the lower cover plate (6) are connected by U-bolts (14).

3. The narrow-track leaf spring suspension structure according to claim 2, characterized in that, There are two auxiliary spring sliders (10), which are positioned directly above the two ends of the auxiliary spring (5).

4. The narrow wheelbase leaf spring suspension structure according to claim 2, characterized in that, The front end of the main spring (4) is rotatably connected to the front support (2) through the pin (3), and the rear end of the main spring (4) is inserted into the rear support (9). The upper surface of the rear end of the main spring (4) abuts against the lower surface of the main spring slider (13).

5. The narrow-track leaf spring suspension structure according to claim 4, characterized in that, Two adjusting shims (8) are detachably installed inside the rear support (9), and the two adjusting shims (8) are arranged opposite each other on both sides of the main spring (4).

6. The narrow-track leaf spring suspension structure according to claim 5, characterized in that, The rear support (9) includes an L-shaped fixing part (91), which is fixedly connected to the frame (1). Two oppositely arranged connecting ear plates (92) are fixedly provided at the bottom of the fixing part (91). The adjusting shim (8), the main spring slider (13) and the main spring (4) are all installed between the two connecting ear plates (92). The lower end of the connecting ear plate (92) is connected by a connecting bolt (12), and the main spring (4) is located above the connecting bolt (12).

7. The narrow-track leaf spring suspension structure according to claim 6, characterized in that, The adjusting shim (8) includes a triangular plate-shaped shim body (81), with two opposing limiting parts (82) fixedly provided on the top of the shim body (81), and a through hole (83) opened at the lower end of the shim body (81), and a connecting bolt (12) installed in the through hole (83).

8. The narrow-track leaf spring suspension structure according to claim 1, characterized in that, The upper surface of the main spring slider (13) is U-shaped, and the lower surface of the main spring slider (13) is arc-shaped.

9. The narrow-track leaf spring suspension structure according to claim 1, characterized in that, The upper surface of the auxiliary spring slider (10) is a plane, and the lower surface of the auxiliary spring slider (10) is an arc surface.

10. A vehicle, characterized in that, Includes a narrow-track leaf spring suspension structure as described in any one of claims 1-9.

Images