Seat cushion framework assembly structure

Abstract

This invention relates to the field of automotive seat technology, and more particularly to a seat cushion frame assembly structure, including a slide rail frame and a mating part, which includes a plug-in seat fixed to the slide rail frame. A plug block is inserted into the top of the plug-in seat, and the left and right sides of the plug block are snapped and fixed to the inner wall of the plug-in seat by snap-fit ​​components. A buffer component is provided at the bottom of the plug block. This invention achieves a quick, plug-and-play assembly between the seat cushion frame and the slide rail base. Operators do not need any tools; they only need to vertically insert the plug block into the plug-in seat. During insertion, the inclined surface at the bottom of the snap-fit ​​block contacts the inner wall of the plug-in seat, generating a horizontal force that forces the snap-fit ​​block, along with the inner insert shaft, to retract against the support spring. When the plug block reaches the predetermined locking position, the support spring releases its elasticity, automatically springing the snap-fit ​​block into the slot and issuing a locking prompt. The entire assembly process takes no more than two seconds. Compared to the cumbersome steps of traditional bolt fastening methods, which require drilling, pre-tightening, and tightening four or more bolts, this invention improves assembly efficiency and significantly reduces production line cycle time and labor costs.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, and more particularly to a seat cushion frame assembly structure. Background Technology

[0002] As the core load-bearing component supporting the weight of passengers, the assembly and connection structure between the seat cushion frame and the lower slide rail base, or seat slide rail assembly, directly affects the overall rigidity, safety performance, and production assembly efficiency of the seat.

[0003] In existing technologies, the methods for fixing the seat cushion frame to the slide rail base mainly have the following technical solutions and shortcomings:

[0004] Traditional bolt fastening method: This is currently the most mainstream method. The seat cushion frame and the slide rail base each have corresponding mounting holes. During assembly, the holes must be aligned, and then multiple high-strength bolts, usually four or more, are screwed in manually or by automated equipment, applying a specified torque. The drawbacks of this method are: cumbersome assembly steps, with multiple actions involving drilling, pre-tightening, and tightening taking a long time; sensitive to tolerances, if there are deviations in the hole positions or slight deformation of the parts, installation is difficult; in addition, specialized tightening tools and torque control are required, increasing the complexity of the workstation and equipment costs. Some seat assemblies use welding or riveting to permanently fix the seat cushion frame to the slide rail base. While this method provides a reliable connection, it is not removable, making subsequent maintenance, replacement, or recycling difficult; furthermore, welding thermal stress can easily cause component deformation, and the process is complex and unsuitable for connecting dissimilar materials. Therefore, a seat cushion frame assembly structure is needed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to solve the problems mentioned in the background section.

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

[0007] A seat cushion frame assembly structure includes a slide rail frame, and further includes:

[0008] The docking part includes a plug-in seat fixed to the slide rail frame. A plug-in block is inserted at the top of the plug-in seat, and the left and right sides of the plug-in block are snapped and fixed to the inner wall of the plug-in seat by snap-fit ​​parts. A buffer is provided at the bottom of the plug-in block. A threaded column is connected to the top of the plug-in block. An adjustable threaded cylinder is threadedly sleeved at the top of the threaded column, and an upper connecting block is movably installed at the top of the adjustable threaded cylinder.

[0009] The seat frame includes side plates, with a perforated plate connected to the inner side of the top of each side plate. The left sides of the two side plates are connected to a connecting plate, and the right sides of the two side plates are connected by a connecting shaft.

[0010] The auxiliary support includes a suspension rod fixed to the inner side of the side bone plate. Two spring plates are movably installed on the surface of the suspension rod, and the ends of the spring plates are connected to the hangers. A snap plate is snapped onto the surface of the spring plate and is fixed to the surface of the lower connecting plate. The two ends of the left side of the lower connecting plate are connected to the extension plates, and the extension plates are connected and fixed to the upper connecting block.

[0011] The support part is connected between the slide rail frame and the lower plate.

[0012] Preferably, the snap-fit ​​component includes two outer shaft cylinders symmetrically arranged in the transverse through hole of the insert block. An inner insert shaft is inserted into the outer side of the outer shaft cylinder through the through hole. The inner insert shaft is connected to the outer shaft cylinder by a support spring. A snap-fit ​​block is connected to the end of the inner insert shaft, and the snap-fit ​​block is embedded in the inner wall of the insert base through a snap-fit ​​groove. The bottom end of the snap-fit ​​block is set with an inclined surface.

[0013] Two toothed plates are symmetrically and offset on the inner sides of the two outer shaft cylinders. The inner sides of both toothed plates are meshed with gears. One end of the gear is rotatably mounted on the inner wall of the insert block, and the other end of the gear is connected to an adjusting shaft that passes through the insert block.

[0014] Preferably, the end face of the adjusting shaft has a strip-shaped adjusting hole.

[0015] Preferably, the buffer includes an arc-shaped spring piece, and the surface of the plug seat is provided with an arc-shaped groove. The two ends of the arc-shaped spring piece are engaged with the inner grooves at both ends of the arc-shaped groove. The top end of the arc-shaped spring piece is connected to a movable shaft, the top end of the movable shaft is inserted into the inside of the vertical cylinder, the top end of the vertical cylinder is connected to the bottom end of the plug block, and the movable shaft is connected to the inner end face of the vertical cylinder through a return spring.

[0016] Preferably, the secondary support portion further includes several secondary spring plates stacked at the bottom of the spring plate. The secondary spring plates are stacked and attached to the spring plate and are reinforced by clamp plates. The clamp plates are composed of upper and lower clamping plates and multiple sets of bolts passing through them.

[0017] Preferably, the supporting part includes a support plate that is connected and fixed to the slide rail frame, and a lower buckle plate is connected to the top of the support plate, which abuts against the upper surface of the lower support plate; a movable plate is sleeved on the surface of the support plate, and a threaded adjusting shaft is rotatably installed at the bottom of the movable plate, and the threaded adjusting shaft passes through the bottom end of the slide rail frame through a threaded hole.

[0018] Preferably, the buckle plate is fixedly connected to the surface of the lower plate by bolts.

[0019] Preferably, the extension plate and the upper connecting block are fixedly connected by bolts.

[0020] Preferably, the adjustable threaded cylinder is threadedly engaged with the threaded column, and the support height of the upper connecting block can be changed by rotating the adjustable threaded cylinder.

[0021] The present invention has at least the following beneficial effects:

[0022] 1. This invention enables quick, plug-and-play assembly between the seat frame and the slide rail base. Operators do not need any tools; they only need to vertically insert the plug into the connector. During insertion, the inclined surface at the bottom of the plug contacts the inner wall of the connector, generating a horizontal force that forces the plug, along with the inner insert shaft, to retract against the support spring. When the plug reaches the predetermined locking position, the support spring releases its elasticity, automatically springing the plug into the slot and issuing a click locking prompt. The entire assembly process takes no more than two seconds. Compared to the cumbersome steps of traditional bolt fastening methods, which require drilling, pre-tightening, and tightening more than four bolts, this invention improves assembly efficiency and significantly reduces production line cycle time and labor costs.

[0023] 2. This invention has adaptive buffering and tolerance compensation capabilities. When the insert block descends, the return spring inside the vertical cylinder is first compressed, providing initial buffering in the vertical direction. Subsequently, the two ends of the arc-shaped spring sheet undergo progressive elastic deformation in the arc-shaped groove of the insert seat, forming end damping. This not only effectively absorbs the impact energy at the moment of insertion, avoiding damage to the block or the inner wall of the insert seat caused by rigid collision, but also automatically compensates for dimensional deviations caused by manufacturing or welding. Even if there is a small gap or misalignment between the insert block and the insert seat, the elastic element can also adaptively adjust through deformation to ensure smooth insertion and reliable locking.

[0024] 3. This invention enables reversible, non-destructive disassembly and maintenance. When it is necessary to repair or replace the seat cushion frame, the operator only needs to use a simple tool such as a screwdriver to insert into the strip-shaped hole on the end face of the adjustment dial shaft, rotate the adjustment dial shaft, drive the gear to rotate synchronously, and the gear drives two staggered and symmetrically arranged toothed plates to move in opposite directions in a straight line. The toothed plates pull the inner insertion shaft and the locking block inward through the outer shaft cylinder to overcome the elastic force of the support spring, so that the locking block can be smoothly disengaged from the locking groove on the inner wall of the insertion seat, and the insertion block can be lifted upward to complete the separation.

[0025] 4. This invention enables on-demand adjustment of support stiffness. In the secondary support section, the spring plate serves as the main elastic element, bearing the passenger's weight. Several secondary spring plates are stacked sequentially at its bottom end. After all the spring plates are stacked and fitted together, they are joined and reinforced by a clamp plate. The clamp plate consists of upper and lower clamping plates and multiple sets of bolts running through it. Operators can change the equivalent stiffness of the elastic component by increasing or decreasing the number of secondary spring plates—the more secondary spring plates, the greater the overall stiffness, suitable for heavier passengers; alternatively, without increasing or decreasing the number of secondary spring plates, the relative sliding friction resistance between the spring plates can be changed by adjusting the tightening torque of the clamp plate bolts, thereby finely adjusting the stiffness characteristics.

[0026] 5. This invention enhances the overall structural stability and assembly tolerance through auxiliary support components. The support components include a support plate fixed to the slide rail frame and a lower buckle plate connected to the top of the support plate. The lower buckle plate abuts against the upper end face of the lower connecting plate, forming a second load-bearing point in addition to the docking points. The two docking points on the left and right sides, together with the rear or middle support components, constitute a three-point support system, which significantly improves the torsional stiffness and vibration resistance of the seat cushion frame. The rotating threaded adjustment shaft can drive the movable plate to rise and fall along the support plate, thereby fine-tuning the pre-tightening force of the lower buckle plate against the lower connecting plate, effectively compensating for accumulated manufacturing and assembly tolerances, and avoiding abnormal noises or local overloads caused by false supports. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the external structure of a seat cushion frame assembly structure proposed in this invention;

[0029] Figure 2 This is a schematic diagram of the external top view of a seat cushion frame assembly structure proposed in this invention;

[0030] Figure 3 This is an external top-view disassembly diagram of a seat cushion frame assembly structure proposed in this invention;

[0031] Figure 4 This is a three-dimensional disassembly diagram of the docking part in a seat cushion frame assembly structure proposed in this invention;

[0032] Figure 5 This is a partial disassembly diagram of the docking section in a seat cushion frame assembly structure proposed in this invention;

[0033] Figure 6 This is a three-dimensional disassembly diagram of the snap-fit ​​component in the seat cushion frame assembly structure proposed in this invention;

[0034] Figure 7 This is a three-dimensional disassembly diagram of the seat cushion frame part in a seat cushion frame assembly structure proposed in this invention;

[0035] Figure 8 This is a three-dimensional structural diagram of the secondary support part in a seat cushion frame assembly structure proposed in this invention;

[0036] Figure 9 This is a three-dimensional structural diagram of the supporting part in a seat cushion frame assembly structure proposed in this invention.

[0037] In the picture:

[0038] 1. Slide rail frame;

[0039] 2. Connecting parts; 21. Insert socket; 22. Insert block; 23. Snap-fit ​​component; 231. Gear; 232. Adjusting pivot shaft; 233. Gear plate; 234. Outer shaft cylinder; 235. Inner insert shaft; 236. Snap-fit ​​block; 237. Support spring; 24. Buffer component; 241. Vertical cylinder; 242. Movable shaft; 243. Arc-shaped spring; 244. Return spring; 25. Threaded column; 26. Adjustable threaded cylinder; 27. Upper connecting block;

[0040] 3. Seat cushion frame; 31. Side plates; 32. Connecting shaft; 33. Connecting plate; 34. Perforated plate;

[0041] 4. Secondary support section; 41. Lower connecting plate; 42. Outer extension plate; 43. Suspension rod; 44. Spring plate; 45. Secondary spring plate; 46. Clamp plate; 47. Hanger rod; 48. Buckle plate;

[0042] 5. Supporting parts; 51. Support plate; 52. Lower buckle plate; 53. Movable plate; 54. Threaded adjustment shaft. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0044] The structural features of the integrated technical solution are as follows:

[0045] Reference Figure 1-9 A seat cushion frame assembly structure, comprising:

[0046] The slide rail frame 1 is mounted on the slide rail and can be freely adjusted.

[0047] The docking part 2 includes a plug-in seat 21 fixed to the slide rail frame 1. A plug block 22 is inserted into the top of the plug-in seat 21, and the left and right sides of the plug block 22 are snapped and fixed to the inner wall of the plug-in seat 21 by snap-fit ​​parts 23. A buffer part 24 is provided at the bottom of the plug block 22. A threaded post 25 is connected to the top of the plug block 22. An adjustable threaded cylinder 26 that can be rotated and adjusted is threaded on the top of the threaded post 25, and an upper connecting block 27 is movably installed on the top of the adjustable threaded cylinder 26.

[0048] The seat frame part 3 includes side bone plates 31. A perforated plate 34 is connected to the inner side of the top of the side bone plates 31. The left sides of the two side bone plates 31 are connected and fixed to the connecting plate 33, and the right sides of the two side bone plates 31 are connected and fixed to the connecting shaft 32.

[0049] The secondary support part 4 serves as an elastic support. The secondary support part 4 includes a suspension rod 43 fixed to the inner side of the side bone plate 31. Two spring plates 44 are movably installed on the surface of the suspension rod 43, and the ends of the spring plates 44 are connected to the hangers 47. The spring plates 44 are snapped with clip plates 48, and the clip plates 48 are fixed to the surface of the lower connecting plate 41 by bolts. The two ends of the left side of the lower connecting plate 41 are connected to the extension plates 42, and the extension plates 42 are connected and fixed to the upper connecting block 27.

[0050] Support part 5 serves as a connection support between the slide rail frame 1 and the lower plate 41.

[0051] The snap-fit ​​component 23 includes two outer shaft cylinders 234 symmetrically arranged in the transverse through hole of the insert block 22. An inner insert shaft 235 is inserted into the outer side of the outer shaft cylinder 234 through the through hole. The inner end face of the inner insert shaft 235 and the outer shaft cylinder 234 is connected and fixed by a support spring 237. A snap-fit ​​block 236 is connected to the end of the inner insert shaft 235, and the snap-fit ​​block 236 is embedded in the inner wall of the insert seat 21 through a snap-fit ​​groove. The bottom end of the snap-fit ​​block 236 is set with an inclined surface.

[0052] Two toothed plates 233 are symmetrically arranged on the inner side of the two outer shaft cylinders 234. The inner sides of the two toothed plates 233 are meshed with gears 231 through teeth. One end of the gear 231 is rotatably mounted on the inner wall of the insert block 22, and the other end of the gear 231 is connected to an adjusting shaft 232. The adjusting shaft 232 passes through the interior of the insert block 22. The end face of the adjusting shaft 232 is provided with a strip-shaped hole. The rotation of the adjusting shaft 232 can be controlled by inserting a tool into the strip-shaped hole.

[0053] The surface of the connector 21 is provided with an arc-shaped groove, and the buffer 24 includes an arc-shaped spring piece 243. The two ends of the arc-shaped spring piece 243 are engaged with the inner grooves at both ends of the arc-shaped groove of the connector 21.

[0054] The top of the arc-shaped spring 243 is connected to a movable shaft 242, and the top of the movable shaft 242 is inserted into the inside of the vertical cylinder 241. The top of the vertical cylinder 241 is connected and fixed to the bottom of the insert block 22. The movable shaft 242 is connected and fixed to the inner end face of the vertical cylinder 241 through a return spring 244.

[0055] Several auxiliary spring plates 45 are stacked sequentially at the bottom of the spring plate 44. The multiple auxiliary spring plates 45 and the spring plate 44 are stacked and attached together and reinforced by clamp plate 46. The clamp plate 46 is composed of upper and lower clamping plates and multiple sets of bolts.

[0056] The support part 5 includes a support plate 51 that is connected and fixed to the slide rail frame 1, and a lower buckle plate 52 is connected to the top of the support plate 51, which abuts against the upper surface of the lower connecting plate 41.

[0057] A movable plate 53 is fitted on the surface of the support plate 51, and a threaded adjusting shaft 54 ​​is rotatably installed at the bottom end of the movable plate 53. The threaded adjusting shaft 54 ​​passes through the bottom end of the slide rail frame 1 through a threaded hole.

[0058] The device will be further disassembled and described below through several embodiments;

[0059] Example 1;

[0060] The plug-in adaptive quick-installation structure of the docking part is described in this embodiment, which focuses on the quick assembly and adaptive locking function of the docking part 2.

[0061] like Figures 4 to 6 As shown, the docking part 2 includes a plug-in seat 21 that is fixedly connected to the slide rail frame 1. The top of the plug-in seat 21 has a slot that matches the plug block 22. During assembly, the operator does not need any tools and only needs to insert the plug block 22 directly downward into the plug-in seat 21.

[0062] The linkage mechanism is as follows: When the insert 22 is inserted downwards, the locking blocks 236 in the locking members 23 on the left and right sides of the insert 22 have an inclined bottom surface. The inclined surface first contacts the upper edge of the inner wall of the insertion base 21, generating a horizontal component force. This component force pushes the locking blocks 236 together with the inner insertion shaft 235 to overcome the elastic force of the support spring 237 and retract into the outer shaft cylinder 234. When the insert 22 continues to descend to the predetermined position, the locking blocks 236 align with the preset slots on the inner wall of the insertion base 21. The support spring 237 releases its elastic potential energy, quickly pushing the locking blocks 236 into the slots, achieving automatic locking with a click.

[0063] Meanwhile, the buffer 24 at the bottom of the insert 22 plays a role: the two ends of the arc-shaped spring 243 are engaged with the inner slots at both ends of the arc-shaped groove of the insert 21. When the insert 22 moves downward, the vertical cylinder 241 drives the movable shaft 242 to compress the return spring 244. At the same time, the arc-shaped spring 243 undergoes elastic deformation, thus forming a two-stage buffer - the return spring 244 provides initial buffer in the vertical direction, and the arc-shaped spring 243 provides progressive damping buffer at the end, effectively absorbing the impact energy at the moment of insertion and avoiding rigid collision damage.

[0064] Its technical advantages are: it enables plug-and-play assembly between the seat frame and the slide rail base, eliminating the need for bolt tightening tools and manual hole alignment, thus effectively improving assembly efficiency. At the same time, the presence of the buffer 24 makes the structure adaptable to manufacturing tolerances. Even if there are slight dimensional deviations, they can be compensated by the deformation of the elastic element, ensuring smooth insertion and reliable locking.

[0065] Example 2;

[0066] Height adjustment and disassembly structure of the docking part;

[0067] This embodiment further describes the height adjustment and detachable functions based on the first embodiment described above.

[0068] The top of the insert 22 is connected to a threaded post 25, and an adjustable threaded cylinder 26 is threadedly fitted onto the top of the threaded post 25. An upper connecting block 27 is movably installed on the top of the adjustable threaded cylinder 26. The upper connecting block 27 is connected and fixed to the outer extension plate 42.

[0069] When the height of the seat cushion frame needs to be adjusted, the operator only needs to rotate the adjustable threaded cylinder 26. Since the adjustable threaded cylinder 26 and the threaded post 25 are connected by a thread, the rotation action is converted into the upward and downward movement of the adjustable threaded cylinder 26 along the axial direction of the threaded post 25, which in turn drives the upper connecting block 27 and the outer extension plate 42 and the lower connecting plate 41 fixed thereto to rise and fall as a whole. This adjustment process can achieve stepless adjustment, and after the adjustment is in place, the height position is maintained by the self-locking characteristic of the thread.

[0070] When disassembly or repair is required, the operator can use a screwdriver or other turning tool to insert into the strip-shaped turning hole on the end face of the adjusting shaft 232 and rotate the adjusting shaft 232. The adjusting shaft 232 drives the gear 231 to rotate, and the gear 231 drives two staggered and symmetrically arranged toothed plates 233 to move towards each other. The toothed plates 233 drive the outer shaft cylinder 234 and the inner insert shaft 235 to move inward, causing the retaining block 236 to disengage from the retaining groove of the insert seat 21. At this time, lifting the insert block 22 upwards completes the disassembly.

[0071] Its technical advantages are twofold: firstly, it provides an adjustable seat frame height to accommodate passengers of different sizes or different seat installation height requirements; secondly, it achieves reversible assembly, solving the problem of non-removable traditional welded or riveted structures, facilitating later maintenance, replacement, and recycling. Simultaneously, the gear and toothed plate linkage unlocking mechanism is labor-saving and offers good unlocking synchronization, avoiding unilateral jamming.

[0072] Example 3;

[0073] Elastic support and stiffness adjustment structure for the secondary support section;

[0074] This embodiment focuses on describing the elastic support function of the secondary support part 4 and its stiffness adjustment mechanism.

[0075] The secondary support part 4 includes a suspension rod 43 fixed inside the side bone plate 31. Two spring plates 44 are movably installed on the surface of the suspension rod 43. The ends of the spring plates 44 are connected to the hangers 47. The surface of the spring plates 44 is fixedly connected to the surface of the lower plate 41 through a snap plate 48.

[0076] Its linkage mechanism is as follows: When the seat cushion frame bears the weight of the passenger, the load is transmitted to the spring plate 44 through the side bone plate 31 and the suspension rod 43 in sequence. The spring plate 44, as the main elastic element, undergoes bending deformation and generates an upward elastic reaction force, which plays a role in buffering and shock absorption. The suspension rod 47 connects the end of the spring plate 44 to other parts of the seat cushion frame to form a complete force flow loop.

[0077] To further adjust the support stiffness, in this embodiment, several auxiliary spring plates 45 are stacked sequentially at the bottom of the spring plate 44. These auxiliary spring plates 45 are overlapped and fitted together with the spring plate 44, and then reinforced by a clamp plate 46. The clamp plate 46 consists of upper and lower clamping plates and multiple sets of bolts. Operators can change the equivalent stiffness of the spring plate 44 and auxiliary spring plates 45 in the entire elastic assembly by increasing or decreasing the number of auxiliary spring plates 45 or adjusting the tightness of the clamp plate 46. Specifically, the tighter the clamp plate 46 is tightened, the more restricted the relative sliding between the spring plates, and the greater the overall stiffness; conversely, appropriately loosening the clamp plate 46 can reduce the overall stiffness, resulting in a softer riding experience.

[0078] Its technical effect is that the auxiliary support part 4 constitutes an elastic support system with adjustable stiffness. On the one hand, the stacked structure of the spring plate 44 and the auxiliary spring plate 45 provides a larger elastic stroke and more linear stiffness characteristics than a single spring plate. On the other hand, by increasing or decreasing the number of auxiliary spring plates 45 or adjusting the tightness of the clamp plate 46, the support stiffness can be adjusted as needed, which can adapt to application scenarios with different weight passengers or different comfort requirements.

[0079] Example 4;

[0080] Auxiliary support and fine-tuning structure for supporting parts;

[0081] This embodiment focuses on describing the auxiliary support function of support part 5 and its ability to fine-tune its relative position with the slide rail frame.

[0082] The support part 5 includes a support plate 51 that is fixedly connected to the slide rail frame 1. A lower buckle plate 52 is connected to the top of the support plate 51, and the lower buckle plate 52 abuts against the upper end face of the lower connecting plate 41. This structure forms an auxiliary support point in addition to the docking part 2. The two docking parts 2 on the left and right sides, together with the rear support part 5, form a three-point support, which improves the stability of the overall structure.

[0083] A movable plate 53 is fitted on the surface of the support plate 51, and a threaded adjusting shaft 54 ​​is rotatably installed at the bottom end of the movable plate 53. The threaded adjusting shaft 54 ​​passes through the bottom end of the slide rail frame 1 through a threaded hole.

[0084] When it is necessary to fine-tune the support height or eliminate assembly gaps, the operator rotates the threaded adjustment shaft 54. The threaded adjustment shaft 54 ​​engages with the threaded hole at the bottom of the slide rail frame 1. The rotation action is converted into the lifting and lowering movement of the movable plate 53 along the surface of the support plate 51. When the movable plate 53 moves up or down, it changes the pre-tightening force of the lower buckle plate 52 on the lower connecting plate 41, thereby fine-tuning the support height of the auxiliary support point.

[0085] Its technical effects are as follows: on the one hand, the support part 5 provides an additional load-bearing point, reducing the load on the docking part 2 and extending the service life of the snap-fit ​​part 23; on the other hand, the threaded adjustment shaft 54 ​​realizes the independent fine-tuning function of the auxiliary support point, which can compensate for the cumulative tolerances of manufacturing and assembly, ensure that all support points are evenly stressed, and avoid abnormal noise or local overload caused by the false support of individual support points.

[0086] Example 5;

[0087] This embodiment describes the complete seat cushion frame assembly structure after the above-mentioned parts are combined and its synergistic technical effects.

[0088] See Figures 1 to 9 A seat cushion frame assembly structure includes a slide rail frame 1, a docking part 2, a seat cushion frame part 3, a secondary support part 4, and a support part 5.

[0089] Assembly process: First, the side bone plate 31, connecting shaft 32, connecting plate 33 and perforated plate 34 of the seat frame part 3 are pre-assembled into a rigid frame. The suspension rod 43 of the auxiliary support part 4 is fixed to the inside of the side bone plate 31. The spring plate 44, auxiliary spring plate 45, clamp plate 46, suspension rod 47 and buckle plate 48 are pre-assembled and fixed on the lower connecting plate 41. The outer extension plate 42 on the left side of the lower connecting plate 41 is connected and fixed to the upper connecting block 27 of the docking part 2.

[0090] Then, the insert 22 of the docking part 2 is directly inserted into the plug seat 21 pre-installed on the slide rail frame 1, and the snap-fit ​​part 23 automatically locks in place, completing the main load-bearing connection. At the same time, the lower buckle plate 52 of the support part 5 naturally abuts against the upper end face of the lower connecting plate 41, forming auxiliary support.

[0091] Synergy between assembly efficiency and structural stability: The plug-and-play structure of the docking part 2 greatly improves assembly efficiency, while the auxiliary support of the support part 5 eliminates the wobbling gap that may exist in a single snap-fit ​​structure. The combination of the two ensures both quick assembly characteristics and the stability and rigidity of the final structure.

[0092] Synergistic effect of multiple buffers and ride comfort: While absorbing the impact of the impact, the buffer 24 forms a series elastic system with the spring plate 44 of the secondary support part 4 under normal use. Vibrations from the road surface are first attenuated by the buffer 24, and then attenuated a second time by the spring plate 44, which significantly improves ride comfort.

[0093] Synergy between adjustable stiffness and adjustable height: The adjustable threaded cylinder 26 enables overall height adjustment of the seat cushion frame, while the addition or removal of the auxiliary spring plate 45 allows for independent adjustment of the support stiffness. These two functions operate independently, allowing the same seat platform to quickly adapt to the needs of different vehicle models or user groups, greatly improving the versatility of components.

[0094] Synergy between maintainability and economy: The unlockable design of the snap-fit ​​23 allows the entire seat frame to be disassembled without damage, making it easy to replace worn spring plates 44 or cushioning components 24 individually without replacing the entire seat assembly, thus reducing the maintenance cost over the entire life cycle.

[0095] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A seat cushion frame assembly structure, comprising a slide rail frame (1), characterized in that, Also includes: The docking part (2) includes a plug-in seat (21) fixed to the slide rail frame (1). A plug-in block (22) is inserted at the top of the plug-in seat (21), and the left and right sides of the plug-in block (22) are snapped and fixed to the inner wall of the plug-in seat (21) by snap-fit ​​parts (23). A buffer part (24) is provided at the bottom of the plug-in block (22). A threaded column (25) is connected to the top of the plug-in block (22). An adjustable threaded cylinder (26) is threaded on the top of the threaded column (25), and an upper connecting block (27) is movably installed on the top of the adjustable threaded cylinder (26). The seat frame part (3) includes side bone plates (31), the inner side of the top of the side bone plates (31) is connected to a perforated plate (34), the left side of the two side bone plates (31) is connected to a connecting plate (33), and the right side of the two side bone plates (31) is connected to each other through a connecting shaft (32). The auxiliary support part (4) includes a suspension rod (43) fixed inside the side bone plate (31). Two spring plates (44) are movably installed on the surface of the suspension rod (43), and a hanger (47) is connected to the end of the spring plate (44). A snap plate (48) is snapped on the surface of the spring plate (44), and the snap plate (48) is fixed on the surface of the lower connecting plate (41). An extension plate (42) is connected to both ends of the left side of the lower connecting plate (41), and the extension plate (42) is connected and fixed to the upper connecting block (27). The support part (5) is connected between the slide rail frame (1) and the lower plate (41).

2. The seat cushion frame assembly structure according to claim 1, characterized in that, The snap-fit ​​component (23) includes two outer shaft cylinders (234) symmetrically arranged in the transverse through hole of the insert block (22). An inner insert shaft (235) is inserted into the outer side of the outer shaft cylinder (234) through the through hole. The inner insert shaft (235) is connected to the outer shaft cylinder (234) by a support spring (237). A snap-fit ​​block (236) is connected to the end of the inner insert shaft (235), and the snap-fit ​​block (236) is embedded in the inner wall of the insert seat (21) through a snap-fit ​​groove. The bottom end of the snap-fit ​​block (236) is set with an inclined surface. Two toothed plates (233) are symmetrically arranged on the inner side of the two outer shaft cylinders (234). The inner side of both toothed plates (233) meshes with a gear (231). One end of the gear (231) is rotatably mounted on the inner wall of the insert block (22). The other end of the gear (231) is connected to an adjusting shaft (232), which passes through the insert block (22).

3. The seat cushion frame assembly structure according to claim 2, characterized in that, The end face of the adjusting shaft (232) is provided with a strip-shaped adjusting hole.

4. The seat cushion frame assembly structure according to claim 1, characterized in that, The buffer (24) includes an arc-shaped spring piece (243), and the surface of the plug-in seat (21) is provided with an arc-shaped groove. The two ends of the arc-shaped spring piece (243) are engaged with the inner grooves at both ends of the arc-shaped groove. The top end of the arc-shaped spring piece (243) is connected to a movable shaft (242). The top end of the movable shaft (242) is inserted into the inside of the vertical cylinder (241). The top end of the vertical cylinder (241) is connected to the bottom end of the plug block (22). The movable shaft (242) is connected to the inner end face of the vertical cylinder (241) through a return spring (244).

5. The seat cushion frame assembly structure according to claim 1, characterized in that, The secondary support part (4) also includes several secondary spring plates (45) stacked at the bottom of the spring plate (44). The several secondary spring plates (45) are stacked and attached to the spring plate (44) and are reinforced by clamp plates (46). The clamp plates (46) are composed of upper and lower clamping plates and multiple sets of bolts.

6. The seat cushion frame assembly structure according to claim 1, characterized in that, The supporting part (5) includes a support plate (51) that is connected and fixed to the slide rail frame (1). The top of the support plate (51) is connected to a lower buckle plate (52), which abuts against the upper end face of the lower connecting plate (41). A movable plate (53) is sleeved on the surface of the support plate (51), and a threaded adjusting shaft (54) is rotatably installed at the bottom end of the movable plate (53). The threaded adjusting shaft (54) passes through the bottom end of the slide rail frame (1) through a threaded hole.

7. The seat cushion frame assembly structure according to claim 1, characterized in that, The buckle plate (48) is fixedly connected to the surface of the lower plate (41) by bolts.

8. The seat cushion frame assembly structure according to claim 1, characterized in that, The extension plate (42) and the upper connecting block (27) are fixedly connected by bolts.

9. The seat cushion frame assembly structure according to claim 1, characterized in that, The adjustable threaded cylinder (26) is threadedly engaged with the threaded column (25), and the support height of the upper connecting block (27) can be changed by rotating the adjustable threaded cylinder (26).

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