A leaf spring assembly and vehicle therefor

Abstract

The utility model relates to a leaf spring assembly and vehicle thereof, wherein the leaf spring assembly comprises: a first leaf spring, a second leaf spring and a first fixing part, first through holes and second through holes are respectively formed on the first leaf spring and the second leaf spring, the first fixing part passes through the first through hole and the second through hole, so that the first leaf spring and the second leaf spring are fixedly connected, the first leaf spring is configured to be able to swing up and down relative to the second leaf spring, limit grooves are respectively formed on the first leaf spring on both sides of the first through hole, limit blocks are respectively formed on the second leaf spring corresponding to the limit grooves, the limit blocks are clamped in the limit grooves to limit the first leaf spring from rotating and swinging relative to the second leaf spring. In the utility model, the first leaf spring can be limited from rotating and swinging relative to the second leaf spring, the first leaf spring can be ensured to be transmitted to the second leaf spring and released through the contact part, and the stability during the driving of the vehicle is ensured.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a leaf spring assembly and its vehicle. Background Technology

[0002] In automobiles, leaf spring assemblies are part of the suspension system and consist of multiple stacked leaf springs. Their main function is to connect the vehicle frame and axle via suspension. Exposed between the frame and axle, they bear the load impact of the wheels on the frame, reduce severe vibrations of the vehicle body, and maintain the vehicle's stability and adaptability to different road conditions.

[0003] In practical applications, when leaf spring assemblies are subjected to load impact, in addition to relative up-and-down swinging, relative rotational swinging (i.e., deflection swinging) often occurs between the leaf springs. Deflection swinging causes the superposition angle between the leaf springs to change, thereby causing a series of vehicle malfunctions, such as: vehicle deviation, braking deviation, vehicle load center of gravity shift, vehicle handling difficulty, and heavy vehicle steering. Utility Model Content

[0004] The purpose of this utility model is to provide a leaf spring assembly to solve the problem of leaf spring misalignment between leaf springs in the prior art during vehicle use.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A leaf spring assembly, comprising: A first leaf spring, a second leaf spring, and a first fixing member are provided. The first leaf spring and the second leaf spring are respectively provided with a first through hole and a second through hole. The first fixing member passes through the first through hole and the second through hole, so that the first leaf spring and the second leaf spring are fixedly connected. The first leaf spring is configured to be able to swing up and down relative to the second leaf spring. The first leaf spring has limiting grooves formed on both sides of the first through hole, and the second leaf spring has limiting blocks formed on the corresponding limiting grooves. The limiting blocks are engaged in the limiting grooves to restrict the first leaf spring from rotating and swinging relative to the second leaf spring.

[0006] According to the above technical means, the first fixing member can fix the first leaf spring and the second leaf spring through the first through hole and the second through hole. Since the first leaf spring is configured to swing up and down relative to the second leaf spring, when the first leaf spring swings up and down relative to the second leaf spring, the first leaf spring will rotate and wobble relative to the second leaf spring. By forming limiting grooves on both sides of the first through hole on the first leaf spring and forming limiting blocks on the second leaf spring corresponding to the limiting grooves, the limiting blocks are engaged in the limiting grooves, which can limit the displacement along the length or width of the first leaf spring when the first leaf spring swings up and down relative to the second leaf spring, that is, prevent rotation and wobble.

[0007] Furthermore, the limiting groove is a strip-shaped hole, and the length direction of the strip-shaped hole extends along the length direction of the first leaf spring.

[0008] According to the above technical means, by designing the limiting groove as a strip-shaped hole, and the length direction of the strip-shaped hole extends along the length direction of the first leaf spring, when the first leaf spring swings up and down relative to the second leaf spring, it is ensured that there is sufficient gap between the limiting block and the limiting groove, which can avoid interference between the first leaf spring and the second leaf spring; at the same time, since the length direction of the strip-shaped hole extends along the length direction of the first leaf spring, the limiting block and the limiting groove can be relatively precisely matched in the width direction of the strip-shaped hole, thus avoiding rotational wobble of the first leaf spring relative to the second leaf spring.

[0009] Furthermore, buffer members are respectively installed at both ends of the second leaf spring, and the buffer members are installed on the side of the second leaf spring close to the first leaf spring, and the buffer members are configured to abut against the first leaf spring.

[0010] According to the above technical means, by installing buffers at both ends of the second leaf spring, the collision between the two ends of the first leaf spring and the two ends of the second leaf spring is prevented during the swinging process of the first leaf spring, thereby reducing the contact noise between the first and second leaf springs, improving the ride smoothness of the vehicle, and preventing metal fatigue during the swinging process of the first leaf spring, which would affect the service life of the first and second leaf springs.

[0011] Furthermore, it also includes a second fixing member, wherein mounting holes are formed at both ends of the second leaf spring, and the second fixing member can pass through the mounting holes to install the corresponding buffer members at both ends of the second leaf spring.

[0012] According to the above technical means, the second fixing member can pass through the mounting hole to install the corresponding buffer member at both ends of the second leaf spring, ensuring that the buffer member can be stably installed at both ends of the second leaf spring, preventing the buffer member from detaching from the second leaf spring under the compression of the first leaf spring, and increasing the connection stability between the buffer member and the second leaf spring.

[0013] Furthermore, the buffer element has buffer holes formed on it.

[0014] According to the above-mentioned technical means, by forming buffer holes on the buffer component, when the first leaf spring compresses the buffer component, the pressure of the first leaf spring inside the buffer component can be dispersed through the buffer holes, making the stress distribution more uniform. This avoids excessive stress concentration at the contact part between the buffer component and the first leaf spring, thereby greatly reducing the risk of the buffer component cracking or being damaged due to fatigue and improving its durability. At the same time, setting buffer holes on the buffer block can make the initial segment of the stiffness curve of the first leaf spring compressing the buffer block smoother, reducing the contact noise between the first leaf spring and the second leaf spring, and improving the ride smoothness and ride comfort.

[0015] Furthermore, the first fastener includes a bolt and a nut, the bolt passing through the first through hole and the second through hole and then connected to the nut to fix the first leaf spring and the second leaf spring together.

[0016] According to the above technical means, after the bolt passes through the first through hole and the second through hole, it is connected to the nut. The first leaf spring and the second leaf spring can be fixedly connected by the cooperation of the bolt and the nut, which simplifies the installation process of the first leaf spring and the second leaf spring and increases the connection stability of the first leaf spring and the second leaf spring.

[0017] Furthermore, the first leaf spring has a first lug and a second lug formed at its two ends, respectively.

[0018] According to the above-mentioned technical means, by forming a first lug and a second lug at both ends of the first leaf spring, the first leaf spring is flattened when compressed, and the distance between the first lug and the second lug increases; when rebounding, the first leaf spring returns to its arched shape, and the distance between the first lug and the second lug decreases. This causes the effective length of the first leaf spring to change when it is compressed and rebounded, which can release the tensile and shear stresses of the first leaf spring during compression and rebound, allowing the first leaf spring to bend smoothly and freely, thereby more effectively absorbing the impact from the road surface; at the same time, the leaf spring assembly can be installed on the vehicle body through the first lug and the second lug.

[0019] Furthermore, the limiting block is generally conical.

[0020] Based on the above technical means, the limiting block is cone-shaped, that is, the diameter of the top of the limiting block is smaller than the diameter of the bottom. On the one hand, it can facilitate the demolding of the limiting block; on the other hand, designing the limiting block as cone-shaped can facilitate the locking of the limiting block in the limiting groove, allowing for a certain error between the limiting groove and the limiting block, thus increasing the fault tolerance rate in the manufacturing process of the limiting block and the limiting groove.

[0021] Furthermore, there is a gap between the top of the limiting block and the bottom of the limiting groove.

[0022] According to the above technical means, when the first leaf spring is subjected to downward pressure, the first leaf spring will deform downward and squeeze the contact part between the second leaf spring and the first leaf spring, and transmit the pressure to the second leaf spring. Since there is a gap between the top of the limiting block and the bottom of the limiting groove, the first leaf spring will not squeeze the limiting block, thus avoiding damage to the limiting block and ensuring the integrity of the limiting block during the process of the first leaf spring deforming and squeezing the second leaf spring, thereby restricting the rotation and swing of the first leaf spring relative to the second leaf spring.

[0023] Furthermore, a vehicle includes a vehicle body and the aforementioned leaf spring assembly, the leaf spring assembly being mounted on the vehicle body.

[0024] The beneficial effects of this utility model are: The first fixing member can fix the first leaf spring and the second leaf spring through the first through hole and the second through hole. Since the first leaf spring is configured to swing up and down relative to the second leaf spring, when the first leaf spring swings up and down relative to the second leaf spring, the first leaf spring will rotate and wobble relative to the second leaf spring. By forming limit grooves on both sides of the first through hole on the first leaf spring and forming limit blocks on the second leaf spring corresponding to the limit grooves, the limit blocks can be engaged in the limit grooves to prevent the first leaf spring from rotating and wobble relative to the second leaf spring when it swings up and down, thus ensuring the stability of the vehicle during driving. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure in the relaxed state of Embodiment 1; Figure 2 This is an enlarged view of part A of the structure in this embodiment. Figure 3 This is a structural diagram of the limiting groove in Embodiment 1; Figure 4 This is a schematic diagram of the overall structure in the usage state of this embodiment.

[0026] Among them, 1-first leaf spring, 11-limiting groove, 12-first coil lug, 13-second coil lug.

[0027] 2-Second leaf spring, 21-Limiting block; 3-First fastener, 31-Bolt, 32-Nut; 4-Buffer element, 41-Buffer hole; 5-Second fastener; 6-Gap. Detailed Implementation

[0028] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] Example 1 like Figures 1-4 As shown, this embodiment proposes a leaf spring assembly, including: a first leaf spring 1, a second leaf spring 2, and a first fixing member 3. The first leaf spring 1 and the second leaf spring 2 are respectively formed with a first through hole (not shown in the figure) and a second through hole (not shown in the figure). The first fixing member 3 passes through the first through hole and the second through hole, so that the first leaf spring 1 and the second leaf spring 2 are fixedly connected. The first leaf spring 1 is configured to be able to swing up and down relative to the second leaf spring 2. Limiting grooves 11 are respectively formed on both sides of the first through hole on the first leaf spring 1. Limiting blocks 21 are respectively formed on the second leaf spring 2 corresponding to the limiting grooves 11. The limiting blocks 21 are engaged in the limiting grooves 11 to restrict the first leaf spring 1 from rotating and swinging relative to the second leaf spring 2.

[0031] like Figures 1-4 As shown in this embodiment, during use, the first leaf spring 1 will swing up and down relative to the second leaf spring 2. During use, due to vehicle vibration and road inclination, the first leaf spring 1 may rotate relative to the second leaf spring 2. In this embodiment, a limiting groove 11 is provided on the first leaf spring 1, and a limiting block 21 is provided on the second leaf spring 2 corresponding to the limiting groove 11, and the limiting block 21 is engaged in the limiting groove 11, thereby restricting the first leaf spring 1 from rotating relative to the second leaf spring 2.

[0032] like Figure 1 and ~ Figure 4As shown, in this preferred embodiment, a first straight section (straight section in the figure) and a second straight section (straight section in the figure) are respectively formed in the middle of the first leaf spring 1 and the second leaf spring 2, and the first straight section and the second straight section are in contact with each other, which can increase the contact area of ​​the first leaf spring 1 and the second leaf spring 2 and ensure the stable transmission of force between the first leaf spring 1 and the second leaf spring 2. The first through hole and the limiting groove 11 are located on the first straight section, and the second through hole and the limiting block 21 are located on the second straight section to prevent the first leaf spring 1 and the second leaf spring 2 from rotating and swinging.

[0033] like Figure 3 As shown, in this embodiment, the limiting groove 11 is a strip-shaped hole, and the length direction of the strip-shaped hole extends along the length direction of the first leaf spring 1. By designing the limiting groove 11 as a strip-shaped hole, and the length direction of the strip-shaped hole extending along the length direction of the first leaf spring 1, when the first leaf spring 1 swings up and down relative to the second leaf spring 2, it ensures that there is sufficient gap between the limiting block 21 and the limiting groove 11, which can avoid interference between the first leaf spring 1 and the second leaf spring 2; at the same time, since the length direction of the strip-shaped hole extends along the length direction of the first leaf spring 1, the limiting block 21 and the limiting groove 11 can be relatively precisely matched in the width direction of the strip-shaped hole, avoiding rotational wobble of the first leaf spring 1 relative to the second leaf spring 2.

[0034] In this preferred embodiment, the length of the limiting groove 11 is 13mm and the width of the limiting groove 11 is 11±1mm.

[0035] like Figure 1 and Figure 4 As shown, in this embodiment, buffer members 4 are respectively installed at both ends of the second leaf spring 2, and the buffer members 4 are installed on the side of the second leaf spring 2 close to the first leaf spring 1. The buffer members 4 are configured to abut against the first leaf spring 1.

[0036] By installing buffers 4 at both ends of the second leaf spring 2, collisions between the two ends of the first leaf spring 1 and the two ends of the second leaf spring 2 are prevented during the swinging process of the first leaf spring 1, thereby reducing the contact noise between the first leaf spring 1 and the second leaf spring 2, improving the smoothness of vehicle driving, and preventing metal fatigue during the swinging process of the first leaf spring 1, which would affect the service life of the first leaf spring 1 and the second leaf spring 2.

[0037] like Figure 1 and Figure 4As shown, this embodiment also includes a second fixing member 5. Mounting holes (not shown in the figure) are formed at both ends of the second leaf spring 2. The second fixing member 5 can pass through the mounting holes to install the corresponding buffer members 4 at both ends of the second leaf spring 2. The second fixing member 5's ability to pass through the mounting holes to install the corresponding buffer members 4 at both ends of the second leaf spring 2 ensures that the buffer members 4 can be stably installed at both ends of the second leaf spring 2, preventing the buffer members 4 from detaching from the second leaf spring 2 under the compression of the first leaf spring 1, thus increasing the connection stability between the buffer members 4 and the second leaf spring 2.

[0038] like Figure 1 and Figure 4 As shown, in this embodiment, a buffer hole 41 is formed on the buffer member 4. By forming a buffer hole 41 on the buffer member 4, when the first leaf spring 1 compresses the buffer member 4, the pressure of the first leaf spring 1 inside the buffer member 4 can be dispersed through the buffer hole 41, making the stress distribution more uniform. This avoids excessive stress concentration at the contact part between the buffer member 4 and the first leaf spring 1, thereby greatly reducing the risk of the buffer member 4 cracking or being damaged due to fatigue and improving its durability. The buffer hole 41 on the buffer member 4 makes the initial segment of the stiffness curve of the first leaf spring 1 compressing the buffer block 41 smoother, reducing the contact noise between the first leaf spring 1 and the second leaf spring 2, and improving the smoothness of vehicle driving and ride comfort.

[0039] like Figure 2 As shown, in this embodiment, the first fixing member 3 includes a bolt 31 and a nut 32. The bolt 31 passes through the first through hole and the second through hole and is connected to the nut 32 to fix the first leaf spring 1 and the second leaf spring 2 together. The bolt 31 passes through the first through hole and the second through hole and is connected to the nut 32. The cooperation of the bolt 31 and the nut 32 can fix the first leaf spring 1 and the second leaf spring 2 together, which simplifies the installation process of the first leaf spring 1 and the second leaf spring 2 and increases the connection stability of the first leaf spring 1 and the second leaf spring 2.

[0040] like Figure 1 and Figure 4 As shown, in this embodiment, a first lug 12 and a second lug 13 are formed at both ends of the first leaf spring 1. By forming the first lug 12 and the second lug 13 at both ends of the first leaf spring 1, when the first leaf spring 1 is compressed, the first leaf spring 1 is flattened, and the distance between the first lug 12 and the second lug 13 increases; when it rebounds, the first leaf spring 1 returns to its arched shape, and the distance between the first lug 12 and the second lug 13 decreases. This causes the effective length of the first leaf spring 1 to change when it is compressed and rebounded, which can release the tensile and shear stresses of the first leaf spring 1 during compression and rebound, allowing the first leaf spring 1 to bend smoothly and freely, thereby more effectively absorbing the impact from the road surface.

[0041] In this preferred embodiment, the first spring lug is fixedly installed to the vehicle body mounting hole (not shown in the figure) by bolts, and the second spring lug is floatingly installed to the vehicle body mounting hole (not shown in the figure) through the leaf spring mounting plate (not shown in the figure), thereby installing the leaf spring assembly on the vehicle body through the first spring lug and the second spring lug.

[0042] like Figure 2 As shown, in this embodiment, the limiting block 21 is generally conical. The limiting block 21 is generally conical, that is, the diameter of the top of the limiting block 21 is smaller than the diameter of the bottom. On the one hand, it facilitates the demolding of the limiting block 21; on the other hand, designing the limiting block 21 as a whole makes it easier to snap the limiting block 21 into the limiting groove 11, which is convenient for assembly, and allows for a certain degree of error between the limiting groove 11 and the limiting block 12, increasing the fault tolerance rate during the manufacturing process of the limiting block 11 and the limiting groove 12.

[0043] In this preferred embodiment, the bottom diameter of the limiting block 21 is 11±0.1mm, and the top diameter of the limiting block 21 is 9.8mm.

[0044] like Figure 2 As shown, in this embodiment, there is a gap 6 between the top of the limiting block 21 and the bottom of the limiting groove 11.

[0045] According to the above technical means, when the first leaf spring 1 is subjected to downward pressure, the first leaf spring 1 will deform downward and squeeze the contact part between the second leaf spring 2 and the first leaf spring 1, and transmit the pressure to the second leaf spring 2. Since there is a gap 6 between the top of the limiting block 21 and the bottom of the limiting groove 11, the first leaf spring 1 will not squeeze the limiting block 21, thus ensuring the integrity of the limiting block 21 during the process of the first leaf spring 1 deforming and squeezing the second leaf spring 2, thereby restricting the first leaf spring 1 from rotating and swinging relative to the second leaf spring 2.

[0046] Example 2 This embodiment is similar to Embodiment 1, and the same parts are described in Embodiment 1. The following description only focuses on the improved parts.

[0047] In this embodiment, a vehicle includes a vehicle body and the aforementioned leaf spring assembly, which is mounted on the vehicle body.

[0048] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

Claims

1. A leaf spring assembly, characterized in that, include: A first leaf spring (1), a second leaf spring (2), and a first fixing member (3) are provided. The first leaf spring (1) and the second leaf spring (2) are respectively provided with a first through hole and a second through hole. The first fixing member (3) passes through the first through hole and the second through hole, so that the first leaf spring (1) and the second leaf spring (2) are fixedly connected. The first leaf spring (1) is configured to be able to swing up and down relative to the second leaf spring (2). The first leaf spring (1) has a limiting groove (11) formed on both sides of the first through hole. The second leaf spring (2) has a limiting block (21) formed on each side of the limiting groove (11). The limiting block (21) is engaged in the limiting groove (11) to restrict the first leaf spring (1) from rotating and swinging relative to the second leaf spring (2).

2. A leaf spring assembly according to claim 1, characterized in that, The limiting groove (11) is a strip-shaped hole, and the length direction of the strip-shaped hole extends along the length direction of the first leaf spring (1).

3. A leaf spring assembly according to claim 1, characterized in that, The second leaf spring (2) has buffer members (4) installed at both ends, and the buffer members (4) are installed on the side of the second leaf spring (2) close to the first leaf spring (1), and the buffer members (4) are configured to abut against the first leaf spring (1).

4. A leaf spring assembly according to claim 3, characterized in that, It also includes a second fixing member (5), and mounting holes are formed at both ends of the second leaf spring (2). The second fixing member (5) can pass through the mounting holes to install the corresponding buffer member (4) at both ends of the second leaf spring (2).

5. A leaf spring assembly according to claim 4, characterized in that, The buffer element (4) has a buffer hole (41).

6. A leaf spring assembly according to claim 1, characterized in that, The first fastener (3) includes a bolt (31) and a nut (32). The bolt (31) passes through the first through hole and the second through hole and is connected to the nut (32) to fix the first leaf spring (1) and the second leaf spring (2) together.

7. A leaf spring assembly according to claim 1, characterized in that, The first leaf spring (1) has a first lug (12) and a second lug (13) formed at its two ends respectively.

8. A leaf spring assembly according to claim 1, characterized in that, The limiting block (21) is cone-shaped as a whole.

9. A leaf spring assembly according to claim 1, characterized in that, There is a gap (6) between the top of the limiting block (21) and the bottom of the limiting groove (11).

10. A vehicle, comprising a vehicle body, characterized in that, It also includes a leaf spring assembly as described in any one of claims 1-9, the leaf spring assembly being mounted on the vehicle body.

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