Automobile plate spring support connecting structure

Abstract

The utility model provides an automobile plate spring support connecting structure, which relates to the technical field of plate spring supports and comprises a frame body, two auxiliary thread fixing holes are formed in the top of the interior of the frame body, a connecting reinforcing block is further arranged at the bottom of the interior of the frame body, and a connecting assembly is mounted on the right side of the frame body. The connecting assembly is fixedly connected with the frame body through a reinforcing structure, an auxiliary threaded fixing hole is formed in the top of the frame body, a connecting reinforcing block is additionally arranged at the bottom of the frame body, and a vertical fixing screw, a transverse fixing screw and a plurality of nuts are adopted for connection, so that a multi-layer and multi-angle fastening system is formed. The vertical fixing screw penetrates through the bottom of the frame body, the connecting reinforcing block is in threaded connection with the auxiliary threaded fixing hole, and the connecting part between the connecting piece body and the vertical fixing screw and the connecting part between the vertical fixing screw and the connecting reinforcing block are fixed in cooperation with a plurality of first nuts correspondingly.

Description

Technical Field

[0001] This utility model relates to the field of leaf spring bracket technology, and in particular to a connecting structure for an automotive leaf spring bracket. Background Technology

[0002] Automotive leaf springs are the most traditional elastic elements in automotive suspension systems. Due to their advantages such as high reliability, simple structure, short manufacturing process, low cost, and ability to greatly simplify the structure, they are widely used. Automotive leaf springs are generally composed of several alloy spring steel leaves of unequal length, forming a group of spring beams with approximately equal strength. In the suspension system, in addition to playing a buffering role, when it is mounted longitudinally in the car and connected to the frame at one end by a fixed hinge, it can undertake the task of transmitting forces and torques in all directions, as well as determining the trajectory of wheel movement, thus playing a guiding role. Automotive leaf spring brackets are support frames used to assemble automotive leaf springs.

[0003] Traditional leaf spring bracket connection methods often have some drawbacks. They simply use bolts to connect the leaf spring bracket to the frame, which can result in insufficient strength and a tendency to loosen. Furthermore, during long-term vehicle operation, the bolts at the connection between the leaf spring bracket and the pin are subject to continuous vibrations and impacts from complex road conditions, as well as the vehicle's own dynamic loads. Once the bolts loosen, the connection between the leaf spring bracket and the frame becomes unstable. This not only prevents the leaf spring from performing its proper cushioning and support functions, but also alters the vehicle's suspension system parameters, thereby affecting the vehicle's handling and ride comfort, and may even lead to serious safety accidents.

[0004] Therefore, we propose an automotive leaf spring bracket connection structure. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies. Traditional leaf spring bracket connection methods have many defects. They rely solely on simple bolts to connect to the vehicle frame, which are not strong enough and are prone to loosening. Moreover, at the connection between the leaf spring bracket and the pin, the bolts are also prone to loosening due to continuous vibration and impact from complex road conditions and the vehicle's own dynamic load during long-term vehicle operation. Once the bolts loosen, the connection between the leaf spring bracket and the vehicle frame becomes unstable, causing the leaf spring to fail to perform its buffering and support functions properly. This alters the parameters of the vehicle's suspension system, affecting handling and ride comfort, and may even lead to serious safety accidents.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A car leaf spring bracket connection structure includes a frame body. The top of the frame body has two auxiliary threaded fixing holes, and the bottom of the frame body has a connecting reinforcement block. A connecting assembly is installed on the right side of the frame body. The connecting assembly is connected and fixed to the frame body through the reinforcement structure. The reinforcement structure includes two vertical fixing screws, four first nuts, a horizontal fixing screw, and two second nuts.

[0008] The connecting assembly also has a fixing pin inside, and a spiral lubrication groove is formed on the outer surface of the fixing pin. Limiting cavities are formed on both side walls of the fixing pin. The fixing pin also has two third nuts. Two connecting holes are formed on each of the two limiting cavities. Anti-detachment components are provided inside the two limiting cavities. The anti-detachment components are used to limit the third nuts and prevent them from falling off. The anti-detachment components include a mounting block, two compression springs, two connecting plates and two locking rods. A limiting plate is provided at the connection of the mounting block. A second mounting groove is formed inside the mounting block. A center plate is provided at the center of the second mounting groove.

[0009] As a preferred embodiment of this utility model, the anti-detachment component further includes two connecting seats, which are installed on the two side walls of the center plate. Each of the two connecting seats is provided with a plurality of limiting slide rails, and each of the plurality of limiting slide rails is provided with a limiting slider. Two connecting plates are provided between the plurality of adjacent limiting sliders. A compression spring is provided on the inner side of each of the two connecting plates, and a locking rod is provided on the outer side of each of the two connecting plates.

[0010] As a preferred embodiment of this utility model, both vertical fixing screws penetrate the bottom of the frame body and are connected between the connecting reinforcing block and the two auxiliary threaded fixing holes, and the vertical fixing screws are threadedly connected to the auxiliary threaded fixing holes.

[0011] As a preferred embodiment of this utility model, all four first nuts are installed on the two vertical fixing screws, wherein two of the first nuts are fixed at the connection between the connector body and the vertical fixing screw, and the other two first nuts are fixed at the connection between the vertical fixing screw and the connecting reinforcing block.

[0012] As a preferred embodiment of this utility model, the transverse fixing screw penetrates the right side wall of the connector body and the frame body, and also penetrates the center of the connecting reinforcement block. Two second nuts are installed on the transverse fixing screw, one of which is installed at the connection between the connector body and the transverse fixing screw, and the other is installed at the connection between the transverse fixing screw and the connecting reinforcement block.

[0013] As a preferred embodiment of this utility model, a first mounting groove is also provided on the right side wall of the connector body. The first mounting groove is used to install the transverse fixing screw. A leaf spring bracket mounting cavity is also provided at the bottom of the connector body. The fixing pin is installed inside the leaf spring bracket mounting cavity and penetrates the leaf spring bracket mounting cavity on both sides.

[0014] As a preferred embodiment of this utility model, the mounting block of the anti-detachment component is inserted into the limiting cavity for use, and the two locking rods pass through the two connecting holes of the limiting cavity to form a connection.

[0015] In a preferred embodiment of this utility model, the locking rod is connected to the compression spring via the connecting plate, and the connecting plate is slidably connected to the limiting slide rail via the limiting slider.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this invention, by setting auxiliary threaded fixing holes at the top of the frame body and adding connecting reinforcement blocks at the bottom, and using vertical fixing screws, horizontal fixing screws, and multiple nuts for connection, a multi-layered, multi-angle fastening system is formed. The vertical fixing screws penetrate through the bottom of the frame body, and the connecting reinforcement blocks are threadedly connected to the auxiliary threaded fixing holes. Multiple first nuts are used to fix the connection between the connecting body and the vertical fixing screws, and between the vertical fixing screws and the connecting reinforcement blocks, respectively. This effectively enhances the connection strength between the frame and the connecting components, greatly reduces the risk of loosening due to vibration and impact, and ensures that the leaf spring bracket can be stably connected to the frame under various working conditions, providing a solid foundation for the reliable operation of the vehicle suspension system.

[0018] The spiral lubrication grooves on the outer surface of the fixed pin help reduce friction and wear between the pin and the bracket, extending its service life. Meanwhile, the anti-disengagement components in the limiting cavities on both sides of the pin, using components such as compression springs, connecting plates, and locking rods, can reliably limit the third nut during vehicle operation, even under complex vibrations and impacts, preventing it from loosening and falling off. This effectively avoids the danger of the leaf spring bracket falling off due to loose pin nuts, further improving the safety and stability of vehicle operation. Attached Figure Description

[0019] Figure 1 A schematic diagram of the main structure of an automotive leaf spring bracket connection structure provided by this utility model;

[0020] Figure 2 An exploded structural diagram of an automotive leaf spring bracket connection structure provided by this utility model;

[0021] Figure 3A schematic diagram of the mounting block and limiting plate of an automotive leaf spring bracket connection structure provided by this utility model;

[0022] Figure 4 This utility model provides a schematic diagram of the internal structure of the mounting block of an automotive leaf spring bracket connection structure.

[0023] Legend: 1. Frame body; 2. Auxiliary threaded fixing hole; 3. Connecting reinforcing block; 4. Connecting part body; 5. Vertical fixing screw; 6. First nut; 7. Horizontal fixing screw; 8. Second nut; 10. First mounting groove; 11. Leaf spring bracket mounting cavity; 12. Fixing pin; 13. Spiral lubrication groove; 14. Third nut; 15. Limiting cavity; 16. Connecting hole; 17. Mounting block; 18. Limiting plate; 181. Second mounting groove; 19. Center plate; 20. Connecting seat; 21. Limiting slide rail; 22. Limiting slider; 23. Connecting plate; 24. Compression spring; 25. Locking rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Example

[0029] like Figure 1-4 As shown, this utility model provides a technical solution: an auxiliary threaded fixing hole 2 is provided at the top of the frame body 1, a connecting reinforcing block 3 is added at the bottom, and a vertical fixing screw 5, a horizontal fixing screw 7 and multiple nuts are used for connection to form a multi-layer, multi-angle fastening system.

[0030] This design uses multiple connection points and screws in different directions to distribute the stress on the connection parts, making the connection between the frame and the connecting components more stable. Compared with a single connection method, it can better resist forces from all directions, such as vibrations, bumps and lateral forces generated during vehicle operation and steering.

[0031] Both vertical fixing screws 5 pass through the bottom of the frame body 1 and are connected between the connecting reinforcing block 3 and the two auxiliary threaded fixing holes 2. The vertical fixing screws 5 and the auxiliary threaded fixing holes 2 are threaded together. Four first nuts 6 are installed on the two vertical fixing screws 5. Two of the first nuts 6 are fixed at the connection between the connecting body 4 and the vertical fixing screws 5, and the other two first nuts 6 are fixed at the connection between the vertical fixing screws 5 and the connecting reinforcing block 3.

[0032] The threaded connection provides greater friction and self-locking capability, enabling the vertical fixing screw 5 to firmly connect the frame body 1, the connecting reinforcement block 3, and the connecting body 4 together. The first nut 6 further prevents the screw from loosening. By tightening the nut, the preload at the connection is increased, thereby enhancing the reliability of the connection. When the vehicle is in motion and subjected to vertical vibration and impact, the combination of the vertical fixing screw 5 and the first nut 6 can effectively prevent vertical displacement and loosening of the connection.

[0033] The transverse fixing screw 7 passes through the right side wall of the connector body 4 and the frame body 1, and also passes through the center of the connecting reinforcement block 3. Two second nuts 8 are installed on the transverse fixing screw 7. One second nut 8 is installed at the connection between the connector body 4 and the transverse fixing screw 7, and the other second nut 8 is installed at the connection between the transverse fixing screw 7 and the connecting reinforcement block 3.

[0034] The lateral fixing screw 7 is mainly designed to resist lateral forces that may occur during vehicle operation, such as centrifugal force during turning. Together with the vertical fixing screw 5, it forms a two-dimensional fastening plane, making the connection more stable. The second nut 8 also serves to prevent the lateral fixing screw 7 from loosening, ensuring that the relative position between the connecting component and the frame body 1 remains unchanged under the action of lateral forces.

[0035] The first mounting slot 10 is used to install the horizontal fixing screw 7 to prevent the horizontal fixing screw 7 from not being able to be inserted.

[0036] The outer surface of the fixing pin 12 is provided with a spiral lubrication groove 13. The fixing pin 12 is installed inside the leaf spring bracket mounting cavity 11 and penetrates the leaf spring bracket mounting cavity 11 on both sides.

[0037] The presence of the spiral lubrication groove 13 can store a certain amount of lubricant, such as grease. When the fixed pin 12 moves relative to the leaf spring bracket mounting cavity 11, the lubricant can be evenly distributed on the contact surface, reducing the coefficient of friction and thus reducing the degree of wear. This not only extends the service life of the fixed pin 12, but also ensures that the leaf spring bracket can be connected and move more smoothly with the frame body 1 during installation and use, reducing the risk of jamming and damage caused by excessive friction.

[0038] The anti-detachment assembly includes a mounting block 17, two compression springs 24, two connecting plates 23, two locking rods 25, two connecting seats 20, several limiting slide rails 21, several limiting sliders 22, and a center plate 19. The mounting block 17 is carefully provided with a limiting plate 18 at the connection point. The mounting block 17 has a second mounting groove 181 inside. The center plate 19 is located at the center of the second mounting groove 181. The two connecting seats 20 are precisely installed on the two side walls of the center plate 19. Several limiting slide rails 21 are provided on each of the two connecting seats 20. Each of the several limiting slide rails 21 has a limiting slider 22. Two connecting plates 23 are provided between several adjacent limiting sliders 22. Compression springs 24 are provided on the inner side of each of the two connecting plates 23. Locking rods 25 are provided on the outer side of each of the two connecting plates 23.

[0039] The mounting block 17 of the anti-detachment component is tightly inserted into the limiting cavity 15. The two locking rods 25 accurately pass through the two connecting holes 16 of the limiting cavity 15 to form a firm connection. The locking rods 25 are tightly connected to the compression spring 24 through the connecting plate 23. The connecting plate 23 can be flexibly connected to the limiting slide rail 21 through the limiting slider 22. When the vehicle is driving on complex road conditions, such as bumpy mountain roads or passing through continuous speed bumps, the vehicle will be subjected to strong vibration and impact.

[0040] These external forces may cause the fixing pin 12 to be subjected to outward tension. If this tension is too great, the third nut 14 may loosen and fall off. The compression spring 24 in the anti-loosening assembly is in a compressed state under normal conditions. When the fixing pin 12 is subjected to outward tension, the compression spring 24 will use its own elastic potential energy to generate an inward pushing force on the connecting plate 23, thereby making the locking rod 25 tightly stuck in the connecting hole 16, effectively preventing the mounting block 17 from falling out of the limiting cavity 15.

[0041] This fundamentally restricts the movement of the third nut 14, ensuring it remains in a fixed position and preventing the leaf spring bracket from falling off due to loosening of the third nut 14. At the same time, the cooperative design of the limiting slider 22 and the limiting slide rail 21 allows the connecting plate 23 and the locking rod 25 to move stably within a certain range when subjected to external force. This ensures that the anti-detachment component works normally when subjected to external force and prevents it from being damaged due to excessive displacement, thus ensuring the reliability and stability of the entire anti-detachment component.

[0042] During installation, simply press the locking rod 25 into the mounting block 17, and then it will pop out into the connecting hole 16 under the action of the compression spring 24 to form a fixation, thereby keeping the limiting plate 18 in its original position. Thus, the limiting plate 18 can limit and fix the third threaded cap to prevent it from falling off.

[0043] Work process: First, install the connecting reinforcement block 3 at the bottom of the frame body 1. Then, pass the vertical fixing screw 5 through the bottom of the frame body 1 and the connecting reinforcement block 3 and screw it into the auxiliary threaded fixing hole 2. Use the first nut 6 to tighten and fix the connection between the connecting body 4 and the vertical fixing screw 5, and between the vertical fixing screw 5 and the connecting reinforcement block 3, to ensure that the connection between the frame body 1 and the connecting reinforcement block 3 is stable.

[0044] Next, the lateral fixing screw 7 is passed through the connector body 4, the right side wall of the frame body 1 and the center of the connecting reinforcement block 3, and the second nut 8 is installed for fixation to enhance the lateral stability of the connection.

[0045] Next, the fixing pin 12 is inserted into the leaf spring bracket mounting cavity 11, and anti-detachment components are installed in the limiting cavities 15 on both sides of the fixing pin 12, so that the locking rod 25 passes through the connecting hole 16, completing the initial connection between the leaf spring bracket and the frame body 1.

[0046] During vehicle operation, the vertical and horizontal fixing screws 7 and nuts bear and distribute forces from all directions, ensuring the firmness of the connection. At the same time, the spiral lubrication groove 13 of the fixing pin 12 reduces friction and wear, and the anti-detachment component prevents the third nut 14 from loosening and falling off, ensuring that the leaf spring bracket is always stably connected to the frame body 1, providing reliable support for the normal operation of the vehicle suspension system.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A car leaf spring bracket connection structure, comprising a vehicle frame body (1), characterized in that: The top of the frame body (1) has two auxiliary threaded fixing holes (2), and the bottom of the frame body (1) is also provided with a connecting reinforcement block (3). A connecting component is installed on the right side of the frame body (1). The connecting component is connected and fixed to the frame body (1) through a reinforcing structure. The reinforcing structure includes two vertical fixing screws (5), four first nuts (6), a horizontal fixing screw (7), and two second nuts (8). The connecting assembly is further provided with a fixing pin (12) inside. The outer surface of the fixing pin (12) is provided with a spiral lubrication groove (13). Limiting cavities (15) are provided on both sides of the fixing pin (12). The fixing pin (12) is also provided with two third nuts (14). Two connecting holes (16) are provided on the two limiting cavities (15). Anti-detachment components are provided inside the two limiting cavities (15). The anti-detachment components are used to limit the third nuts (14) and prevent them from falling off. The anti-detachment components include a mounting block (17), two compression springs (24), two connecting plates (23), and two locking rods (25). A limiting plate (18) is provided at the connection of the mounting block (17). A second mounting groove (181) is provided inside the mounting block (17). A center plate (19) is provided at the center of the second mounting groove (181).

2. The automotive leaf spring bracket connection structure according to claim 1, characterized in that: The anti-detachment component also includes two connecting seats (20), which are installed on the two side walls of the center plate (19). Each of the two connecting seats (20) is provided with a plurality of limiting slide rails (21), and each of the plurality of limiting slide rails (21) is provided with a limiting slider (22). Two connecting plates (23) are provided between the plurality of adjacent limiting sliders (22). Each of the two connecting plates (23) is provided with a compression spring (24) on its inner side and a locking rod (25) on its outer side.

3. The automotive leaf spring bracket connection structure according to claim 2, characterized in that: Both vertical fixing screws (5) penetrate the bottom of the frame body (1) and are connected between the connecting reinforcing block (3) and the two auxiliary threaded fixing holes (2). The vertical fixing screws (5) are threadedly connected to the auxiliary threaded fixing holes (2).

4. The automotive leaf spring bracket connection structure according to claim 3, characterized in that: All four first nuts (6) are installed on the two vertical fixing screws (5), with two of the first nuts (6) fixed at the connection between the connector body (4) and the vertical fixing screw (5), and the other two first nuts (6) fixed at the connection between the vertical fixing screw (5) and the connecting reinforcing block (3).

5. The automotive leaf spring bracket connection structure according to claim 4, characterized in that: The transverse fixing screw (7) passes through the right side wall of the connector body (4) and the frame body (1), and passes through the center of the connecting reinforcement block (3). Two second nuts (8) are installed on the transverse fixing screw (7). One of the second nuts (8) is installed at the connection between the connector body (4) and the transverse fixing screw (7), and the other second nut (8) is installed at the connection between the transverse fixing screw (7) and the connecting reinforcement block (3).

6. The automotive leaf spring bracket connection structure according to claim 5, characterized in that: The right side wall of the connector body (4) is provided with a first mounting groove (10), which is used to install the transverse fixing screw (7). The bottom of the connector body (4) is also provided with a leaf spring bracket mounting cavity (11), and the fixing pin (12) is installed inside the leaf spring bracket mounting cavity (11) and penetrates the leaf spring bracket mounting cavity (11) on both sides.

7. The automotive leaf spring bracket connection structure according to claim 6, characterized in that: The mounting block (17) of the anti-detachment component is inserted into the limiting cavity (15) for use, and the two locking rods (25) pass through the two connecting holes (16) of the limiting cavity (15) to form a connection.

8. The automotive leaf spring bracket connection structure according to claim 7, characterized in that: The locking rod (25) is connected to the compression spring (24) through the connecting plate (23), and the connecting plate (23) is slidably connected to the limiting slide rail (21) through the limiting slider (22).

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