Rear leaf spring structure with adjustable preloading
Patent Information
- Application Number
- CN202522136552.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-10-10
AI Technical Summary
部分调节机构结构复杂，操作不便，调节精度难以保证，且长期使用后容易出现松动现象，影响预紧力的稳定性
[0015]1. This rear leaf spring structure with adjustable preload allows for adjustment of the preload by turning the handle via an adjustment mechanism. The threaded rod rotates and inserts into the leaf spring, altering its stress state and thus adjusting the preload. Clockwise rotation applies greater pressure to the leaf spring, increasing the preload; counterclockwise rotation decreases the preload. The preload can be controlled by adjusting the number of rotations. When the telescopic insert plate is inserted into the slot, the square plate is inserted into the square groove, and the locking block is engaged in the groove, fixing the threaded rod in place and preventing it from loosening or falling off over time. This ensures the leaf spring provides cushioning, shock absorption, and vehicle body support.
Smart Images
Figure CN224714748U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rear leaf spring technology, specifically a rear leaf spring structure with adjustable preload. Background Technology
[0002] As a core component of a vehicle's suspension system, leaf springs play a crucial role in cushioning, damping, and supporting the vehicle body. Their performance directly affects the vehicle's ride comfort, load-bearing capacity, and safety. However, traditional rear leaf spring structures typically have a fixed preload, making it difficult to adapt to changes in vehicle operating conditions under varying loads, road conditions, and driving requirements.
[0003] While existing adjustable preload leaf spring structures offer some adjustment capabilities, they still present several challenges in practical use. Some adjustment mechanisms are complex, inconvenient to operate, and lack precision; furthermore, they are prone to loosening after prolonged use, affecting the stability of the preload. Utility Model Content
[0004] The purpose of this invention is to provide a rear leaf spring structure with adjustable preload to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a rear leaf spring structure with adjustable preload, comprising a leaf spring, wherein U-shaped clamping plates are fixedly connected to the left and right surfaces of the leaf spring respectively, an adjustment mechanism is provided on the U-shaped clamping plates, and a fixing mechanism is provided on the adjustment mechanism;
[0006] The adjustment mechanism includes a plug-in component and a limiting component, wherein the limiting component is disposed on the plug-in component;
[0007] The plug-in assembly includes a cylindrical tube and a threaded rod. The cylindrical tube is fixedly connected to the top of the U-shaped clamping plate. A connecting ring is fixedly connected to the upper surface of the threaded rod. Mounting seats are fixedly connected to the four sides of the connecting ring. Telescopic insert plates are fixedly connected to the four sides of the top of the cylindrical tube. A slot is opened inside the mounting seat. An elongated groove is opened at the top of the threaded rod. A sliding groove is opened on the four sides of the inner wall of the elongated groove. A long rod is inserted into the sliding groove. A handle is fixedly connected to the top of the long rod. A sliding plate is fixedly connected to the four sides of the surface of the long rod. The surface of the sliding plate is inserted into the sliding groove.
[0008] Preferably, the cylindrical tube and the leaf spring are respectively provided with threaded holes. The threaded rod is threadedly connected to the threaded holes respectively provided in the cylindrical tube and the leaf spring. The threaded rod is inserted into the leaf spring, which can change the stress state of the leaf spring, thereby realizing the adjustment of the preload. When the threaded rod is rotated clockwise, the threaded rod applies greater pressure to the leaf spring, increasing the preload; when rotated counterclockwise, the preload decreases. By controlling the number of rotations of the screw, the magnitude of the preload can be controlled.
[0009] Preferably, the top, bottom, and clockwise side of the four slots are configured as openings, and the surface of the telescopic insert plate is inserted into the interior of the slot.
[0010] Preferably, the limiting component includes a square groove, which is formed inside the telescopic insert plate. A square plate is inserted into the square groove. A fixing plate is fixedly connected to one side of the square plate. A hinge seat is fixedly connected to the fixing plate on the side near the threaded rod and the side away from the threaded rod. A locking seat is hinged to the other side of the hinge seat. A locking block is fixedly connected to the locking seat on the side near the telescopic insert plate. The telescopic insert plate has slots on the side near the threaded rod and the side away from the threaded rod, respectively. The surface of the locking block engages with the inside of the slots. Screws are threadedly connected to the mounting base and the inside of the square plate. The locking block engages in the slots, which can fix the position of the threaded rod and prevent it from loosening and falling off over a long period of time, ensuring that the leaf spring can perform the functions of buffering, shock absorption, and supporting the vehicle body.
[0011] Preferably, the mounting base has a through groove on the side near the fixed plate, and the square plate is inserted through the through groove on the side of the mounting base near the fixed plate.
[0012] Preferably, the fixing mechanism includes a circular slot, which is formed at the bottom of the threaded rod. The bottom of the circular slot is set as an opening. A limiting seat is fixedly connected to the top of the inner wall of the circular slot. Long slots are formed on the front and rear sides of the limiting seat. A circular block is inserted into the circular slot. Connecting seats are fixedly connected to the top two ends of the circular block. Long blocks are fixedly connected to the inner sides of the two connecting seats. A connecting plate is fixedly connected to the bottom of the circular block. Bolts are threadedly connected to the connecting plate and the U-shaped clamping plate.
[0013] Preferably, the left and right sides and the outer side of the two long slots are set as openings, and the surface of the long block is inserted into the inside of the long slot.
[0014] Compared with the prior art, this utility model provides a rear leaf spring structure with adjustable preload, which has the following advantages:
[0015] 1. This rear leaf spring structure with adjustable preload allows for adjustment of the preload by turning the handle via an adjustment mechanism. The threaded rod rotates and inserts into the leaf spring, altering its stress state and thus adjusting the preload. Clockwise rotation applies greater pressure to the leaf spring, increasing the preload; counterclockwise rotation decreases the preload. The preload can be controlled by adjusting the number of rotations. When the telescopic insert plate is inserted into the slot, the square plate is inserted into the square groove, and the locking block is engaged in the groove, fixing the threaded rod in place and preventing it from loosening or falling off over time. This ensures the leaf spring provides cushioning, shock absorption, and vehicle body support.
[0016] 2. This rear leaf spring structure with adjustable preload uses a fixing mechanism to insert a round block into a round slot. By rotating the connecting plate, a long block is inserted into a long slot. Bolts are used to thread-fix the connecting plate and the U-shaped clamping plate, which can firmly fix the threaded rod inside the leaf spring. This further prevents the leaf springs from loosening and ensures that the entire leaf spring structure can maintain a stable and reliable working state under different working conditions. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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 perspective view of the overall structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the plug-in assembly.
[0020] Figure 3 for Figure 2 A schematic diagram of the structure of the cut-off portion;
[0021] Figure 4 This is a schematic diagram of the structure of the limiting component;
[0022] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle;
[0023] Figure 6 This is a structural diagram of the fixing mechanism;
[0024] Figure 7 for Figure 6 A schematic diagram of the structure of the section cut out from the middle;
[0025] Figure 8This is a schematic diagram of the disassembled structure of the fixed mechanism.
[0026] In the diagram: 1. Leaf spring; 2. U-shaped clamping plate; 3. Fixing mechanism; 31. Round hole slot; 32. Long block; 33. Connecting plate; 34. Round block; 35. Bolt; 36. Connecting seat; 37. Long slot; 38. Limiting seat; 4. Adjusting mechanism; 41. Plug-in assembly; 411. Long hole slot; 412. Connecting ring; 413. Threaded rod; 414. Cylindrical tube; 415. Telescopic insert plate; 416. Mounting seat; 417. Screw; 418. Slot; 419. Slide; 4101. Long rod; 4102. Handle; 4103. Slide plate; 42. Limiting assembly; 421. Square slot; 422. Square plate; 423. Fixing plate; 424. Hinge seat; 425. Locking seat; 426. Clamping block; 427. Clamping groove. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.
[0029] This utility model provides the following technical solution:
[0030] Example 1
[0031] Combination Figures 1 to 5 A rear leaf spring structure with adjustable preload includes a leaf spring 1, with U-shaped clamping plates 2 fixedly connected to the left and right surfaces of the leaf spring 1 respectively, an adjustment mechanism 4 provided on the U-shaped clamping plates 2, and a fixing mechanism 3 provided on the adjustment mechanism 4.
[0032] The adjustment mechanism 4 includes a plug-in component 41 and a limiting component 42, with the limiting component 42 disposed on the plug-in component 41;
[0033] The plug-in assembly 41 includes a cylindrical tube 414 and a threaded rod 413. The cylindrical tube 414 is fixedly connected to the top of the U-shaped clamping plate 2. A connecting ring 412 is fixedly connected to the upper surface of the threaded rod 413. Mounting seats 416 are fixedly connected to the four sides of the surface of the connecting ring 412. Telescopic insert plates 415 are fixedly connected to the four sides of the top of the cylindrical tube 414. A slot 418 is opened inside the mounting seat 416. An elongated slot 411 is opened at the top of the threaded rod 413. A sliding groove 419 is opened around the inner wall of the elongated slot 411. A long rod 4101 is inserted into the sliding groove 419. A handle 4102 is fixedly connected to the top of the long rod 4101. A sliding plate 4103 is fixedly connected to the four sides of the surface of the long rod 4101. The surface of the sliding plate 4103 is inserted into the sliding groove 419.
[0034] The cylindrical tube 414 and the leaf spring 1 are respectively provided with threaded holes. The surface of the threaded rod 413 is threadedly connected to the threaded holes provided in the cylindrical tube 414 and the leaf spring 1. The top, bottom and clockwise side of the four slots 418 are set as openings. The surface of the telescopic insert plate 415 is inserted into the slot 418.
[0035] The limiting component 42 includes a square groove 421, which is formed inside the telescopic insert plate 415. A square plate 422 is inserted into the square groove 421. A fixing plate 423 is fixedly connected to one side of the square plate 422. A hinge seat 424 is fixedly connected to the side of the fixing plate 423 near the threaded rod 413 and the side away from the threaded rod 413. A locking seat 425 is hinged to the other side of the hinge seat 424. A locking block 426 is fixedly connected to the side of the locking seat 425 near the telescopic insert plate 415. A slot 427 is formed inside the side of the telescopic insert plate 415 near the threaded rod 413 and the side away from the threaded rod 413, respectively. The surface of the locking block 426 and the inside of the slot 427 are engaged. A screw 417 is threadedly connected to the mounting base 416 and the inside of the square plate 422. A through slot is formed inside the side of the mounting base 416 near the fixing plate 423. The square plate 422 is inserted through into the through slot formed inside the mounting base 416 near the fixing plate 423.
[0036] Furthermore, the threaded rod 413 is inserted into the leaf spring 1, which can change the stress state of the leaf spring 1, thereby adjusting the preload. When the threaded rod 413 is rotated clockwise, the threaded rod 413 applies greater pressure to the leaf spring 1, increasing the preload. When the telescopic insert 415 is stretched and inserted into the slot 418, the square plate 422 is inserted into the square groove 421, and the locking block 426 is locked into the slot 427, which can fix the position of the threaded rod 413, preventing it from loosening and falling off over a long period of time, and ensuring that the leaf spring 1 can play the role of buffering, shock absorption and supporting the vehicle body.
[0037] Example 2
[0038] See Figure 1-8Furthermore, based on Embodiment 1, the fixing mechanism 3 includes a circular hole groove 31, which is opened at the bottom of the threaded rod 413. The bottom of the circular hole groove 31 is set as an opening. A limiting seat 38 is fixedly connected to the top of the inner wall of the circular hole groove 31. Long grooves 37 are opened on the front and rear sides of the limiting seat 38. A circular block 34 is inserted into the circular hole groove 31. Connecting seats 36 are fixedly connected to the top two ends of the circular block 34 respectively. Long blocks 32 are fixedly connected to the inner sides of the two connecting seats 36. A connecting plate 33 is fixedly connected to the bottom of the circular block 34. Bolts 35 are threadedly connected to the connecting plate 33 and the U-shaped clamping plate 2. The left and right sides and the outer side of the two long grooves 37 are set as openings. The surface of the long block 32 is inserted into the long groove 37.
[0039] Furthermore, the round block 34 is inserted into the round hole groove 31, and the connecting plate 33 is rotated to insert the long block 32 into the long groove 37. The connecting plate 33 and the U-shaped clamping plate 2 are threadedly fixed by the bolt 35, which can firmly fix the threaded rod 413 in the steel leaf spring 1. This can further prevent the steel leaf springs 1 from loosening and ensure that the entire steel leaf spring 1 structure can maintain a stable and reliable working state under different working conditions.
[0040] In actual operation, when this device is used, when the long rod 4101 is inserted into the long slot 411, the slide plate 4103 is simultaneously slidably inserted into the slide groove 419. When the handle 4102 is turned, the threaded rod 413 can rotate. Since the threaded rod 413 is threadedly connected to the cylindrical tube 414 and the threaded hole inside the leaf spring 1, the threaded rod 413 can be inserted into the leaf spring 1, which can change the force state of the leaf spring 1, thereby adjusting the preload. When the threaded rod 413 is rotated clockwise, the threaded rod 413 applies greater pressure to the leaf spring 1, increasing the preload; when rotated counterclockwise, the preload decreases. By controlling the number of rotations of the screw, the magnitude of the preload can be controlled.
[0041] When the telescopic insert plate 415 is stretched and inserted into the slot 418 again, the fixing plate 423 drives the square plate 422 to be inserted into the square groove 421. The locking seat 425 is rotated on the hinge seat 424 side, which allows the locking seat 425 to drive the locking block 426 to be locked into the slot 427. This can fix the position of the threaded rod 413 and prevent it from loosening and falling off over a long period of time, ensuring that the leaf spring 1 can have the functions of buffering, shock absorption and supporting the vehicle body.
[0042] The connecting plate 33 is then inserted into the circular slot 31, and the connecting plate 33 is rotated so that the circular block 34 drives the connecting seat 36. The connecting seat 36 drives the long block 32 to be inserted into the long slot 37, so that the connecting plate 33 is positioned at the bottom of the threaded rod 413. Then, the connecting plate 33 and the U-shaped clamping plate 2 are threadedly fixed with bolts 35, so that the threaded rod 413 is firmly fixed in the steel leaf spring 1. This further prevents the steel leaf spring 1 from loosening and ensures that the entire steel leaf spring 1 structure can maintain a stable and reliable working state under different working conditions.
[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. A rear leaf spring structure with adjustable preload, comprising a leaf spring (1), characterized in that: The steel leaf spring (1) has U-shaped clamps (2) fixedly connected to the left and right sides respectively. The U-shaped clamps (2) are provided with an adjustment mechanism (4) and the adjustment mechanism (4) is provided with a fixing mechanism (3). The adjustment mechanism (4) includes a plug-in assembly (41) and a limiting assembly (42), wherein the limiting assembly (42) is disposed on the plug-in assembly (41); The plug-in assembly (41) includes a cylindrical tube (414) and a threaded rod (413). The cylindrical tube (414) is fixedly connected to the top of the U-shaped clamping plate (2). A connecting ring (412) is fixedly connected to the upper surface of the threaded rod (413). Mounting seats (416) are fixedly connected to the four sides of the surface of the connecting ring (412). Telescopic inserts (415) are fixedly connected to the four sides of the top of the cylindrical tube (414). A slot is provided inside the mounting seat (416). (418) The threaded rod (413) has an elongated slot (411) at the top. The inner wall of the elongated slot (411) has a sliding groove (419) on all four sides. A long rod (4101) is inserted into the sliding groove (419). A handle (4102) is fixedly connected to the top of the long rod (4101). A sliding plate (4103) is fixedly connected to the surface of the long rod (4101) on all four sides. The surface of the sliding plate (4103) is inserted into the sliding groove (419).
2. The rear leaf spring structure with adjustable preload according to claim 1, characterized in that: The cylindrical tube (414) and the leaf spring (1) are respectively provided with threaded holes, and the threaded rod (413) is threadedly connected to the threaded holes respectively provided in the cylindrical tube (414) and the leaf spring (1).
3. The rear leaf spring structure with adjustable preload according to claim 1, characterized in that: The four slots (418) are configured to be open at the top, bottom and clockwise side, and the surface of the telescopic insert (415) is inserted into the slot (418).
4. The rear leaf spring structure with adjustable preload according to claim 1, characterized in that: The limiting component (42) includes a square groove (421) which is formed inside the telescopic insert (415). A square plate (422) is inserted into the square groove (421). A fixing plate (423) is fixedly connected to one side of the square plate (422). A hinge seat (424) is fixedly connected to the fixing plate (423) on the side near the threaded rod (413) and the side away from the threaded rod (413). A hinge is hinged on the other side of the hinge seat (424). A locking seat (425) is hinged, and a locking block (426) is fixedly connected to the side of the locking seat (425) near the telescopic insert plate (415). The telescopic insert plate (415) has slots (427) on the side near the threaded rod (413) and the side away from the threaded rod (413). The surface of the locking block (426) is engaged with the inside of the slot (427). The mounting base (416) and the square plate (422) are threadedly connected with screws (417).
5. A rear leaf spring structure with adjustable preload according to claim 4, characterized in that: The mounting base (416) has a through groove on the side near the fixing plate (423), and the square plate (422) is inserted through the through groove on the side of the mounting base (416) near the fixing plate (423).
6. A rear leaf spring structure with adjustable preload according to claim 1, characterized in that: The fixing mechanism (3) includes a circular slot (31), which is opened at the bottom of the threaded rod (413). The bottom of the circular slot (31) is set as an opening. A limiting seat (38) is fixedly connected to the top of the inner wall of the circular slot (31). Long slots (37) are opened on the front and rear sides of the limiting seat (38). A circular block (34) is inserted into the circular slot (31). A connecting seat (36) is fixedly connected to the top two ends of the circular block (34). Long blocks (32) are fixedly connected to the inner sides of the two connecting seats (36). A connecting plate (33) is fixedly connected to the bottom of the circular block (34). Bolts (35) are threadedly connected to the connecting plate (33) and the U-shaped card plate (2).
7. A rear leaf spring structure with adjustable preload according to claim 6, characterized in that: The two long slots (37) at the front and back are set with openings on the left and right sides and the outer side, and the surface of the long block (32) is inserted into the inside of the long slot (37).