A vertical winding machine for automotive shock absorber helical springs

Abstract

This invention discloses a vertical winding machine for automotive shock absorber helical springs, relating to the field of automotive parts processing technology. It aims to solve the technical problem that current vertical winding machines often employ fixed-shape designs for their shaping structures, making it difficult to effectively constrain the wound steel strip. The invention includes a winding assembly. Through the design of the winding assembly, shaping assembly, screw drive device, and shaping end, the front end of the shaping end closely adheres to the surface of the spring steel strip during movement, continuously constraining and counteracting the spring steel strip's rebound stress, preventing deformation after winding, and ensuring stable maintenance of the wound shape. This invention, through the design of the winding assembly, shaping assembly, screw drive device, and shaping end, avoids the problems of loose fit and easy local deformation associated with traditional shaping methods. The precise transmission of the mechanical structure ensures a high degree of matching between the shaping trajectory and the winding shape of the spring steel strip, making it suitable for applications requiring high-precision winding of spring steel strips.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, and more specifically, to a vertical winding machine for automotive shock absorber helical springs. Background Technology

[0002] The coil spring in an automotive shock absorber is a core component determining a vehicle's ride comfort and handling stability, and its molding quality directly depends on the precision and reliability of the winding equipment. Vertical winding machines, as the mainstream production equipment for this type of spring, have become core equipment in the automotive spring OEM field due to their "vertical layout + precise shape control" technical characteristics. After the coil spring is wound, the winding machine often needs to use a shape-maintaining structure to further constrain the shape of the coil spring to eliminate elastic deformation caused by the spring's own stress.

[0003] However, existing vertical winding machines mostly employ fixed-shape designs for their conforming structures, lacking a mechanism for dynamic adaptation to the winding trajectory of the spring steel strip. This makes it difficult for the conforming surface to precisely fit the spiral profile of the wound steel strip, resulting in noticeable gaps in localized areas. This loose fit not only fails to provide effective constraint but also leads to coil loosening and interlayer misalignment due to the elastic rebound of the steel strip during winding, severely affecting molding consistency. Therefore, we propose a vertical winding machine for automotive shock absorber helical springs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to the needs of reality, and provide a vertical winding machine for automotive shock absorber helical springs. This solves the technical problem that the current vertical winding machines often have a fixed shape design for the shape-keeping structure, which makes it difficult to fit the wound steel strip to form an effective shape-keeping constraint.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a vertical winding machine for automotive shock absorber helical springs, comprising a winding assembly, a shaping assembly, a screw drive device, and a shaping end;

[0006] The winding assembly includes a winding roller on which a spring steel strip is wound.

[0007] The conformal assembly includes a housing, a second rotary drive, a first drive gear, a first drive gear ring, a slide groove, and a guide rod;

[0008] The second rotary drive is installed inside the housing. The first drive gear is rotatably connected to the output end of the second rotary drive. The first drive gear ring is meshed with one side of the first drive gear and is rotatably connected inside the housing. The slide groove is vertically installed inside the first drive gear ring. The guide rod is slidably connected inside the slide groove. A limiting guide groove is provided on the housing, and the other end of the guide rod is slidably connected inside the limiting guide groove.

[0009] The housing is installed at the output end of the screw drive device, the conforming end is installed at the other end of the guide rod, and the front end of the conforming end is adapted to a spring steel strip;

[0010] When the guide rod slides within the limiting guide groove, it causes the shaping end to slide along the wound spring steel strip.

[0011] Preferably, the winding assembly further includes a platform, a column, and a first rotation drive;

[0012] The column is mounted on the platform, the first rotary drive is mounted on the column, and the winding roller is mounted on the output end of the first rotary drive.

[0013] Preferably, the molding end includes a molding block, a pad, and a post-winding processing structure;

[0014] The shaping end has a first deformation state and a second deformation state; in the first deformation state, the winding post-processing structure retracts, and the shaping block and pad slide along the wound spring steel strip to maintain the shape of the spring steel strip; in the second deformation state, the winding post-processing structure extends, and the winding post-processing structure slides along the winding roller, and the spring steel strip undergoes stress treatment through the winding post-processing structure when it is rotated and unloaded.

[0015] Preferably, the conforming end further includes a driving structure;

[0016] The driving structure includes a frame, a first telescopic drive, and a drive block;

[0017] The frame is installed at the other end of the guide rod, the two first telescopic drives are respectively installed on both sides of the frame, the two drive blocks are respectively installed at the output ends of the two first telescopic drives, and the two drive blocks are slidably connected to the frame.

[0018] The two conforming blocks are respectively mounted on the two drive blocks;

[0019] When the two drive blocks are in the initial position, the two conforming blocks tighten to fit the thin spring steel strip for new energy vehicles;

[0020] When the two drive blocks are at the end position, the two conformal blocks unfold to fit the thick spring steel bar for off-road vehicles.

[0021] Preferably, the pad is located between two drive blocks and is connected to a second telescopic drive. The second telescopic drive is installed in the frame. A deformable plate is installed in the middle of the pad, and the inside of the pad is a cavity. The cavity of the pad is connected to a first air supply pipe, and the first air supply pipe is connected to an external air supply device.

[0022] When the first air supply pipe supplies air, the cavity of the pad causes the deformation plate to deform and tighten the spring steel strip.

[0023] Preferably, the post-winding processing structure includes a groove, an elastic hollow plate, an exhaust hole, a second air supply pipe, and a third telescopic drive.

[0024] The two grooves are respectively connected to the two sides of the frame, the two elastic hollow plates are respectively slidably connected in the two grooves, a plurality of exhaust holes are opened on one side of the elastic hollow plates, the second air supply pipe is connected to the elastic hollow plate, and the second air supply pipe is connected to an external temperature-controlled air supply device, the elastic hollow plate is installed at the output end of the third telescopic drive, and the third telescopic drive is installed in the frame.

[0025] When the two elastic hollow plates extend, they bend toward the two drive blocks to form a structure that encircles the spring steel strip; the two elastic hollow plates are inserted into and connected by grooves, and the grooves are formed on the winding roller.

[0026] Preferably, a spring-unwinding structure is provided on one side of the winding assembly, the spring-unwinding structure including a ring frame, a connecting frame, a fourth telescopic drive, and a clamping plate;

[0027] The ring frame is rotatably connected to the connecting frame, which is installed at another output end of the screw drive device. The two fourth telescopic drives are respectively installed on both sides of the ring frame, and the two clamping plates are respectively installed at the output ends of the two fourth telescopic drives. The two clamping plates are used to clamp the wound spring steel strip and drive the spring steel strip to move linearly along the winding roller.

[0028] Preferably, the spring-unwinding structure further includes a third rotary drive, a second drive gear, and a second drive gear ring;

[0029] The third rotary drive is installed on one side of the connecting frame, the second drive gear is installed on the output end of the third rotary drive, the second drive gear ring is meshed with one side of the second drive gear, and the second drive gear ring is installed on the outside of the ring frame; the second drive gear ring is used to drive the clamped and wound spring steel strip to rotate, so that the spring steel strip is stress treated by the winding post-processing structure.

[0030] Preferably, a limiting structure is installed at one end of the winding roller, the limiting structure including a fifth telescopic drive, a mounting frame, a limiting plate, a torsion spring, and a limiting groove;

[0031] The fifth telescopic drive is installed in the cavity opened at one end of the winding roller. The mounting frame is installed at the output end of the fifth telescopic drive. Several limiting plates are movably connected to several arms of the mounting frame, and the limiting plates and the arms are connected by torsion springs. The two parts of the limiting groove are opened on one of the limiting plates and the winding roller, and the limiting groove is used to insert the end of the fixed spring steel strip.

[0032] When the limiting plates are rotated and retracted on the arms of the mounting frame, the wound spring steel strip passes through the limiting structure.

[0033] Preferably, the limiting structure further includes a positioning rod and a positioning groove;

[0034] The positioning rods are respectively installed on the limiting plates, and the positioning rods are respectively inserted into and connected in the positioning grooves, and the positioning grooves are all opened at one end of the winding roller.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] 1. This invention, through the design of a winding assembly, a shaping assembly, a screw drive device, and a shaping end, achieves precise motion control of the shaping end via a precision transmission and guiding structure. The front end of the shaping end precisely matches the spring steel strip, maintaining a tight fit against the surface of the spring steel strip throughout the movement. This continuous fit and constraint counteracts the spring steel strip's rebound stress, preventing deformation after winding and ensuring stable maintenance of the wound shape. This invention, through the design of the winding assembly, shaping assembly, screw drive device, and shaping end, avoids the problems of loose fit and localized deformation common in traditional shaping methods. The precise transmission of the mechanical structure ensures a high degree of fit between the shaping trajectory and the winding shape of the spring steel strip, making it suitable for applications requiring high-precision winding of spring steel strips.

[0037] 2. This invention employs a dual-deformation state design at the shaping end, allowing for flexible switching between two deformation states to achieve targeted operations in different processes: In the first deformation state, the shaping block and the pad block are tightly fitted to the surface of the wound spring steel strip and slide along its trajectory. Through continuous and uniform fitting constraints, the rebound stress inside the spring steel strip is effectively offset, preventing shape deviation after winding and ensuring the stable maintenance of the preset winding shape. This avoids the local deformation problems caused by insufficient fitting in traditional shaping methods. When switching to the second deformation state, the spring steel strip naturally passes through the extended post-winding processing structure during the rotation and unwinding process, simultaneously completing stress release and homogenization during the unwinding action. This invention, through its dual-deformation state design at the shaping end, and the precise switching and complementary functions of the two deformation states, enables the shaping end to quickly provide stable shaping constraints after winding and simultaneously complete stress optimization during the unwinding stage. This ensures the winding accuracy of the spring steel strip while simplifying the production process and reducing accuracy losses between processes.

[0038] 3. This invention utilizes a composite structure design of adjustable forming blocks and flexible clamping pads. The first telescopic drive solves the problem of adapting to large spans, allowing switching between thin and thick steel strip forming without replacing components. The second telescopic drive, in conjunction with a pneumatic deformation plate, solves the problems of precise fitting and flexible constraint. Regardless of the thickness or slight differences in surface morphology of the steel strip, the deformation plate's adaptive deformation achieves full clamping. Simultaneously, the cavity design and air supply control of the pads are simple and efficient, allowing adjustment of inflation pressure based on the steel strip material and stress conditions to flexibly adapt to different forming requirements. This invention, through its composite structure design of adjustable forming blocks and flexible clamping pads, achieves universal forming of multi-specification spring steel strips while enhancing forming stability through dual constraints. It avoids the problems of traditional forming devices, such as limited adaptability, weak constraint, and easily damaged steel strips, significantly improving production flexibility and product forming accuracy. It perfectly meets the industrial needs of high-precision winding and forming of spring steel strips for various vehicle models and specifications.

[0039] 4. This invention, through the design of the conforming end and the post-winding treatment structure, uses an elastic hollow plate to encircle the steel strip. Temperature-controlled gas is evenly sprayed onto the steel strip surface through exhaust holes, creating a comprehensive, dead-angle-free temperature-controlled environment. This uniform temperature control accelerates the release and homogenization of internal stress in the steel strip, aiding in its shaping and preventing deformation caused by stress concentration after winding. Simultaneously, the flexibility of the temperature-controlled gas prevents damage to the steel strip surface. This invention, through the design of the conforming end and the post-winding treatment structure, adapts to the shapes of spring steel strips of different specifications and closely adheres to the steel strip surface, ensuring uniform and effective temperature control and stress treatment.

[0040] 5. This invention, through the design of the limiting structure at the end of the winding roller and the winding and unwinding assembly, ensures that during the initial winding, the end of the spring steel strip is inserted into the limiting groove. The limiting plate and the winding roller work together to fix the end, preventing slippage and displacement of the steel strip during winding and ensuring consistency in winding pitch and shape. After the spring steel strip is wound, it moves to push the limiting plate, which then rotates and retracts synchronously, compressing the torsion spring. Once retracted, the limiting plate no longer obstructs the spring steel strip, allowing it to pass smoothly through the limiting structure. This avoids the problem of traditional limiting components protruding and hindering unwinding, ensuring that the unwinding structure can smoothly clamp the steel strip and move linearly along the winding roller, achieving a seamless connection between winding limiting and unwinding without interference. This invention, through the design of the limiting structure at the end of the winding roller and the winding and unwinding assembly, solves the core problems of traditional limiting structures being unstable, leading to winding deviations and structural protrusions hindering unwinding, ensuring the continuity of the production process. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of the present invention.

[0042] Figure 2 This is a schematic diagram of the structure of the winding roller in this invention.

[0043] Figure 3 This is a schematic diagram of the conformal component of the present invention.

[0044] Figure 4 This is a cross-sectional view of the conformal component of the present invention.

[0045] Figure 5 This is a schematic diagram of the internal structure of the conformal component of the present invention.

[0046] Figure 6 This is a schematic diagram of the structure of the present invention when the limiting structure is extended.

[0047] Figure 7 This is a schematic diagram of the limiting structure of the present invention.

[0048] Figure 8 This is a schematic diagram of the structure of the conformal end pad and the elastic hollow plate of the present invention when they are extended.

[0049] Figure 9 This is a schematic diagram of the structure of the conformal end pad and the elastic hollow plate of the present invention when they retract.

[0050] Figure 10 This is a schematic diagram of the structure of the elastic hollow plate of the present invention.

[0051] Figure 11 This is a schematic diagram of the driving structure of the present invention.

[0052] Figure 12 This is a cross-sectional view of the driving structure of the present invention.

[0053] Figure 13 This is a schematic diagram of the spring-unloading structure of the present invention.

[0054] Explanation of the labels in the diagram:

[0055] 1. Winding assembly; 2. Shaping assembly; 3. Screw drive device; 4. Shaping end; 5. Spring unwinding structure; 6. Limiting structure;

[0056] 101. Winding roller; 102. Platform; 103. Column; 104. First rotation drive; 105. Groove;

[0057] 201. Housing; 202. Second rotary drive; 203. First drive gear; 204. First drive gear ring; 205. Slide groove; 206. Guide rod;

[0058] 2011, Limiting guide groove;

[0059] 401. Drive structure; 402. Forming block; 403. Pad block; 404. Post-winding processing structure;

[0060] 4011, Frame; 4012, First telescopic drive; 4013, Drive block; 4014, Second telescopic drive;

[0061] 4031, Deformation plate; 4032, First air supply pipe;

[0062] 4041, Tank body; 4042, Elastic hollow plate; 4043, Exhaust port; 4044, Second air supply pipe; 4045, Third telescopic drive;

[0063] 501. Ring frame; 502. Connecting frame; 503. Fourth telescopic drive; 504. Clamping plate; 505. Third rotary drive; 506. Second drive gear; 507. Second drive gear ring;

[0064] 601. Fifth telescopic drive; 602. Mounting bracket; 603. Limiting plate; 604. Torsion spring; 605. Limiting groove; 606. Positioning rod; 607. Positioning groove. Detailed Implementation

[0065] Example 1, as Figures 1 to 5 As shown, the present invention relates to a vertical winding machine for automotive shock absorber helical springs, comprising a winding assembly 1, a shaping assembly 2, a screw drive device 3, and a shaping end 4; the winding assembly 1 includes a winding roller 101 on which a spring steel strip is wound; the shaping assembly 2 includes a housing 201, a second rotary drive 202, a first drive gear 203, a first drive gear ring 204, a slide groove 205, and a guide rod 206; the second rotary drive 202 is installed inside the housing 201, the first drive gear 203 is rotatably connected to the output end of the second rotary drive 202, and the first drive gear ring 204 is meshed with the first drive gear ring 206. One side of the wheel 203, and the first drive gear ring 204 is rotatably connected to the housing 201. The slide groove 205 is vertically installed in the first drive gear ring 204. The guide rod 206 is slidably connected in the slide groove 205. The housing 201 is provided with a limiting guide groove 2011, and the other end of the guide rod 206 is slidably connected in the limiting guide groove 2011. The housing 201 is installed at the output end of the screw drive device 3. The shaping end 4 is installed at the other end of the guide rod 206, and the front end of the shaping end 4 is adapted to the spring steel strip. When the guide rod 206 slides in the limiting guide groove 2011, it drives the shaping end 4 to slide along the wound spring steel strip.

[0066] The winding assembly 1 also includes a platform 102, a column 103 and a first rotary drive 104; the column 103 is mounted on the platform 102, the first rotary drive 104 is mounted on the column 103, and the winding roller 101 is mounted on the output end of the first rotary drive 104.

[0067] This invention, through the design of the winding assembly 1, the shaping assembly 2, the screw drive device 3, and the shaping end 4, constructs an integrated system for winding, forming, and dynamically conforming to the shape, precisely solving the technical pain points of easy springback deformation and insufficient shaping accuracy of spring steel strips after winding, and significantly improving the stability and accuracy of spring steel strip winding.

[0068] The winding assembly 1, with the winding roller 101 as its core, provides a basic winding carrier for the spring steel strip. The spring steel strip is wound around the winding roller 101 to form a preset winding shape, laying a structural foundation for the subsequent shape-keeping process and ensuring the consistency of the initial winding shape.

[0069] The conforming component 2 achieves precise motion control of the conforming end 4 through a precision transmission and guiding structure: the second rotary drive 202 is installed inside the housing 201. After starting, it drives the first drive gear 203 at the output end to rotate. Through gear meshing, it drives the first drive gear ring 204 to rotate synchronously inside the housing 201. The vertically installed slide groove 205 inside the first drive gear ring 204 rotates with the gear ring, thereby pulling the guide rod 206, which is slidably connected in the slide groove 205, to move. At the same time, the other end of the guide rod 206 is slidably connected in the limiting guide groove 2011 of the housing 201. The limiting guide groove 2011 provides stable guiding constraints for the guide rod 206, so that the guide rod 206, under the double limiting of the slide groove 205 and the limiting guide groove 2011, drives the conforming end 4 to form a motion trajectory that adapts to the winding shape of the spring steel strip.

[0070] The screw drive device 3 provides axial feed power to the forming assembly 2. Its output end drives the housing 201 and the entire forming assembly 2 to move smoothly along the axis of the winding roller 101. In conjunction with the rotational transmission of the forming assembly 2, the forming end 4 achieves full axial coverage and contact while sliding along the wound spring steel strip. The front end of the forming end 4 is precisely matched with the spring steel strip and remains tightly attached to the surface of the spring steel strip during the movement. The continuous contact constraint counteracts the spring rebound stress of the spring steel strip, preventing it from deforming after winding and ensuring the stable maintenance of the wound shape.

[0071] The winding roller 101 completes the basic winding of the spring steel strip. The screw drive device 3 controls the axial feed of the shaping component 2. The shaping component 2 drives the shaping end 4 to dynamically fit and slide along the winding trajectory of the spring steel strip through gear-ring transmission and double guide structure, so as to realize the continuous operation of "winding-fitting-shaping".

[0072] This invention avoids the problems of poor fit and easy local deformation caused by the traditional shaping method through the design of the winding component 1, the shaping component 2, the screw drive device 3 and the shaping end 4. The precise transmission of the mechanical structure ensures a high degree of matching between the shaping trajectory and the winding shape of the spring steel strip, making it suitable for high-precision winding and forming applications of spring steel strips.

[0073] Specifically, such as Figures 8 to 9 As shown, the conforming end 4 of the present invention includes a conforming block 402, a pad 403, and a post-winding treatment structure 404; the conforming end 4 has a first deformation state and a second deformation state; in the first deformation state, the post-winding treatment structure 404 retracts, and the conforming block 402 and the pad 403 slide along the wound spring steel strip to conform to the shape of the spring steel strip; in the second deformation state, the post-winding treatment structure 404 extends, and the post-winding treatment structure 404 slides along the winding roller 101, and the spring steel strip undergoes stress treatment through the post-winding treatment structure 404 when it is rotated and unloaded.

[0074] This invention, through the dual deformation state design of the shape-preserving end 4, constructs an integrated functional system for simultaneous stress treatment during winding and unwinding, precisely solving the technical pain points of easy springback deformation after spring steel bar winding and the cumbersome stress treatment process, significantly improving the forming quality and production process efficiency of spring steel bars.

[0075] The conforming end 4 integrates conforming block 402, pad 403 and winding post-processing structure 404. By flexibly switching between two deformation states, it can achieve targeted operations under different processes: In the first deformation state, the winding post-processing structure 404 actively retracts, and conforming block 402 and pad 403, as core components, closely adhere to the surface of the wound spring steel strip and slide along its trajectory. Through continuous and uniform adhesion constraint, it effectively counteracts the rebound stress inside the spring steel strip, prevents it from deviating in shape after winding, ensures the stable maintenance of the preset winding shape, and avoids the local deformation problem caused by insufficient adhesion in traditional conforming methods.

[0076] When switching to the second deformation state, the post-winding processing structure 404 extends synchronously and slides along the winding roller 101. At this time, during the rotation and unloading process of the spring steel strip, it will naturally pass through the extended post-winding processing structure 404, and stress release and homogenization are completed simultaneously with the unwinding action. This design breaks the traditional production process of "first maintaining shape and fixing, then unwinding and transferring, and finally separate stress treatment", avoiding secondary deformation that may occur during the transfer process, while saving additional stress treatment processes and equipment investment, and achieving a seamless connection between "maintaining shape - unwinding - stress treatment".

[0077] This invention, through the dual deformation state design of the shaping end 4, allows for precise switching and functional complementarity between the two deformation states. This enables the shaping end 4 to provide stable shaping constraints quickly after winding and to simultaneously optimize stress during the unwinding stage. This not only ensures the winding and forming accuracy of the spring steel strip but also simplifies the production process and reduces accuracy loss between processes.

[0078] It is worth noting that, such as Figures 8 to 12As shown, the conforming end 4 of the present invention further includes a drive structure 401; the drive structure 401 includes a frame 4011, a first telescopic drive 4012, and a drive block 4013; the frame 4011 is installed at the other end of the guide rod 206, the two first telescopic drives 4012 are respectively installed on both sides of the frame 4011, the two drive blocks 4013 are respectively installed at the output ends of the two first telescopic drives 4012, and the two drive blocks 4013 are slidably connected to the frame 4011; the two conforming blocks 402 are respectively installed on the two drive blocks 4013; when the two drive blocks 4013 are in the initial position, the two conforming blocks 402 tighten to adapt to the thin spring steel strip for new energy vehicles; when the two drive blocks 4013 are in the end position, the two conforming blocks 402 unfold to adapt to the thick spring steel strip for off-road vehicles.

[0079] This invention, through the design of an adjustable shaping end 4 and a precision drive structure 401, constructs a spring steel bar shaping system that allows for one-click switching and dual-specification adaptation. This completely solves the pain points of traditional shaping devices, which have limited adaptability and require frequent component replacement, and significantly improves the versatility and efficiency of winding and forming spring steel bars of different specifications.

[0080] The molded end 4 uses the frame 4011 as the mounting base, and integrates the drive structure 401 and the molded block 402 to form a functional closed loop. The frame 4011 is fixed to the end of the guide rod 206, providing a stable mounting carrier for the first telescopic drive 4012 on both sides. The two drive blocks 4013 are respectively assembled at the output end of the first telescopic drive 4012 and form a sliding fit with the frame 4011 to ensure the motion accuracy during the drive process. The two molded blocks 402 are correspondingly installed on the drive blocks 4013, and their contact surfaces are designed according to the shape characteristics of the spring steel strip to ensure a tight fit during molded operation.

[0081] The drive structure 401 achieves precise switching of the shape-keeping specification through the telescopic action of the first telescopic drive 4012: when the two drive blocks 4013 are in the initial position, the first telescopic drive 4012 is in a retracted state, driving the two shape-keeping blocks 402 to move closer to each other and tighten, forming a clamping shape-keeping space that matches the thin spring steel strip used in new energy vehicles. The uniform clamping constraint counteracts the rebound stress of the thin spring steel strip, ensuring its winding shape is stable. When it is necessary to adapt to the thick spring steel strip used in off-road vehicles, the first telescopic drive 4012 extends synchronously, pushing the two drive blocks 4013 to slide along the frame 4011 to the end position. The shape-keeping blocks 402 then unfold synchronously, forming a shape-keeping range that matches the outer diameter of the thick spring steel strip. Similarly, effective shape-keeping is achieved through tight fit, avoiding deformation problems caused by the large cross-sectional size and stress concentration of the thick spring steel strip.

[0082] The core advantage of this design is that it eliminates the need to disassemble or replace the molding components. The specification switching between "thin steel bars" and "thick steel bars" can be completed solely through the precise control of the first telescopic drive 4012. This simplifies the operation process and reduces downtime and accuracy errors caused by component replacement. At the same time, the sliding cooperation between the drive block 4013 and the frame 4011 ensures the precise movement trajectory of the molding block 402, so that the molding block 402 can fit tightly with the corresponding specification of spring steel bars whether it is tightened or unfolded, thus ensuring molding stability and molding accuracy.

[0083] This invention, through the design of adjustable mold-keeping end 4 and precision drive structure 401, achieves full coverage mold-keeping for both thin spring steel strips used in new energy vehicles and thick spring steel strips used in off-road vehicles, greatly improving the versatility and production flexibility of the mold, avoiding the resource waste of traditional mold-keeping devices that require one mold per specification, and perfectly adapting to the industrial needs of high-precision winding and forming of spring steel strips of multiple models and specifications.

[0084] Furthermore, such as Figures 8 to 12 As shown, the pad 403 of the present invention is disposed between two drive blocks 4013, and the pad 403 is connected to a second telescopic drive 4014. The second telescopic drive 4014 is installed in the frame 4011. A deformable plate 4031 is installed in the middle of the pad 403, and the interior of the pad 403 is set as a cavity. The cavity of the pad 403 is connected to a first air supply pipe 4032, and the first air supply pipe 4032 is connected to an external air supply device. When the first air supply pipe 4032 supplies air, the cavity of the pad 403 causes the deformable plate 4031 to deform and tighten the spring steel strip.

[0085] This invention utilizes a composite structure design of an adjustable forming block 402 and a flexible clamping pad 403, combined with a dual telescopic drive and a pneumatic deformation mechanism, to construct an integrated system that enables specification adaptation, precise clamping, and flexible forming. This achieves rapid adaptation to spring steel bars of different thicknesses and eliminates forming gaps through flexible clamping, completely solving the problems of traditional forming devices that have limited adaptability and weak constraint, and significantly improving the accuracy and stability of spring steel bar winding.

[0086] A pad 403 is added between the two drive blocks 4013. It is connected to the second telescopic drive 4014 inside the frame 4011. The front and rear positions of the pad 403 can be adjusted by telescopic movement to ensure that the contact distance with the spring steel strip is precise and controllable.

[0087] A deformable plate 4031 is installed in the middle of the pad 403. The plate has an internal cavity and is connected to an external air supply device via a first air supply pipe 4032, forming a pneumatic flexible clamping mechanism. When the conforming block 402 is adjusted to the correct position according to the steel strip specifications, the second telescopic drive 4014 pushes the pad 403 closer to the spring steel strip. Then, the external air supply device supplies air to the cavity of the pad 403 through the first air supply pipe 4032. After the cavity is inflated, the deformable plate 4031 undergoes flexible deformation, tightly clamping the surface of the spring steel strip. This design avoids damage to the steel strip surface from rigid constraints through the flexible contact of the deformable plate 4031, and precisely fills the minute gaps between the conforming block 402 and the steel strip, forming a dual constraint of rigid clamping and flexible clamping. This completely counteracts the springback stress of steel strips of different specifications, preventing localized deformation or shape shift after winding.

[0088] The first telescopic drive 4012 solves the problem of adapting to large spans, allowing switching between thin and thick steel bars for shaping without replacing parts. The second telescopic drive 4014, in conjunction with the pneumatic deformation plate 4031, solves the problems of precise fitting and flexible constraint. Regardless of the thickness of the steel bars or slight differences in surface morphology, the deformation plate 4031 can achieve full clamping through adaptive deformation. At the same time, the cavity design and air supply control of the pad 403 are simple and efficient, and the inflation pressure can be adjusted according to the material and stress of the steel bars to flexibly adapt to different shaping requirements.

[0089] This invention, through the composite structure design of adjustable forming block 402 and flexible clamping pad 403, not only achieves universal forming of spring steel bars of various specifications, but also enhances the stability of forming through double constraint. It avoids the problems of traditional forming devices being only compatible with a single type, having weak constraint and easily damaging steel bars, thus greatly improving production flexibility and product forming accuracy. It perfectly meets the industrial needs of high-precision winding and forming of spring steel bars of various models and specifications.

[0090] Furthermore, such as Figures 8 to 12 As shown, the post-winding processing structure 404 of the present invention includes a groove 4041, an elastic hollow plate 4042, an exhaust port 4043, a second air supply pipe 4044, and a third telescopic drive 4045; two grooves 4041 are respectively connected to both sides of the frame 4011, two elastic hollow plates 4042 are respectively slidably connected in the two grooves 4041, thirty-two exhaust ports 4043 are opened on one side of the elastic hollow plate 4042, and the second air supply pipe 4044 is connected to the elastic hollow plate 4041. The hollow plate 4042 is connected to an external temperature-controlled air supply device via a second air supply pipe 4044. The elastic hollow plate 4042 is installed at the output end of the third telescopic drive 4045, which is installed inside the frame 4011. When the two elastic hollow plates 4042 extend, they bend toward the two drive blocks 4013 to form a structure that encircles the spring steel strip. The two elastic hollow plates 4042 are inserted into and connected to a groove 105, which is opened on the winding roller 101.

[0091] This invention, through the design of the conforming end 4 and the post-winding processing structure 404, constructs an integrated post-winding processing system that features circumferential bonding, uniform temperature control, and synchronous stress optimization. This system completely solves the problems of uneven stress treatment, poor bonding, and easy secondary deformation in traditional spring steel strips after winding, significantly improving the forming quality and mechanical property stability of spring steel strips.

[0092] The post-winding processing structure 404 uses the frame 4011 as its mounting base, forming a functional closed loop. The frame 4011 has grooves 4041 connected to both sides, providing stable sliding guidance for the elastic hollow plates 4042. The two elastic hollow plates 4042 are correspondingly slidably assembled within the grooves 4041, and are installed at the output end of the third telescopic drive 4045 within the frame 4011, achieving precise telescopic extension and retraction through driving power. When the third telescopic drive 4045 is activated, the elastic hollow plates 4042 extend along the grooves 4041 and simultaneously bend naturally towards the drive block 4013, forming a closed structure that completely encircles the spring steel strip, ensuring tight contact with the steel strip surface. Furthermore, the elastic hollow plates 4042 can be inserted into the grooves 105 opened on the winding roller 101. The positioning through the grooves 105 further enhances the encircling stability, preventing displacement during processing.

[0093] The temperature control stress optimization mechanism is highly efficient and precise: Thirty-two vent holes 4043 are evenly distributed on one side of the elastic hollow plate 4042, which are connected to an external temperature-controlled gas supply device through a second gas supply pipe 4044. When the elastic hollow plate 4042 wraps around the steel strip, the temperature-controlled gas supply device delivers gas at a preset temperature into the elastic hollow plate 4042 through the second gas supply pipe 4044. The gas is evenly sprayed onto the surface of the steel strip through the thirty-two vent holes 4043, forming a comprehensive, dead-angle-free temperature-controlled environment. This design not only accelerates the release and homogenization of internal stress in the steel strip through uniform temperature control, but also assists in the shaping of the steel strip, avoiding deformation caused by stress concentration after winding. At the same time, the flexible effect of the temperature-controlled gas will not damage the surface of the steel strip.

[0094] The third telescopic drive 4045 ensures precise control of the telescopic and bending of the elastic hollow plate 4042. The groove 4041 and the groove 105 of the winding roller 101 together ensure the stability of the circumferential positioning. The uniform distribution of the thirty-two exhaust holes 4043 achieves full coverage of the temperature-controlled gas, avoiding uneven local temperature control.

[0095] The present invention, through the design of the conforming end 4 and the post-winding processing structure 404, can not only adapt to the shape of spring steel bars of different specifications, but also closely fit the surface of the steel bar, so that the temperature control and stress treatment effects are uniform and effective.

[0096] Furthermore, such as Figure 13As shown, the winding assembly 1 of the present invention is provided with a spring unloading structure 5 on one side. The spring unloading structure 5 includes a ring frame 501, a connecting frame 502, a fourth telescopic drive 503, and a clamping plate 504. The ring frame 501 is rotatably connected to the connecting frame 502. The connecting frame 502 is installed at the other output end of the screw drive device 3. The two fourth telescopic drives 503 are respectively installed on both sides of the ring frame 501. The two clamping plates 504 are respectively installed at the output ends of the two fourth telescopic drives 503. The two clamping plates 504 are used to clamp the wound spring steel strip and drive the spring steel strip to move linearly along the winding roller 101.

[0097] The spring unloading structure 5 also includes a third rotary drive 505, a second drive gear 506, and a second drive gear ring 507. The third rotary drive 505 is installed on one side of the connecting frame 502, the second drive gear 506 is installed at the output end of the third rotary drive 505, and the second drive gear ring 507 is meshed with one side of the second drive gear 506. The second drive gear ring 507 is installed on the outside of the ring frame 501. The second drive gear ring 507 is used to drive the clamped and wound spring steel strip to rotate, so that the spring steel strip is stress treated by the winding post-processing structure 404.

[0098] This invention, through the design of the spring unloading structure 5, the screw drive device 3, and the winding post-processing structure 404, constructs an integrated operation system for stable clamping and unloading of springs and synchronous stress treatment during rotation. This completely solves the pain points of traditional spring unloading methods, which easily lead to deformation of spring steel bars, disconnect between stress treatment and spring unloading processes, and low efficiency. It significantly improves the uncoiling quality of spring steel bars and the continuity of the production process.

[0099] The spring unloading structure 5 uses the connecting frame 502 as its core mounting carrier, providing stable support for the realization of dual functions. The connecting frame 502 is fixed to the other output end of the screw drive device 3, and the ring frame 501 is rotatably connected to the connecting frame 502, ensuring the smoothness of the rotational movement without interfering with the stability of the linear spring unloading. Two fourth telescopic drives 503 installed on both sides of the ring frame 501 can synchronously drive the two clamping plates 504 at the output end to move towards each other. The clamping surface of the clamping plate 504 conforms to the contour of the spring steel bar, accurately clamping the wound spring steel bar. The clamping force can be adapted to the structural strength of steel bars of different thicknesses, avoiding damage to the steel bar surface due to excessive clamping or detachment due to excessive looseness. When the clamping is in place, the screw drive device 3 drives the connecting frame 502 and the entire spring unloading structure 5 to move smoothly and linearly along the axis of the winding roller 101, gradually pulling the spring steel bar away from the winding roller 101, realizing flexible clamping and linear spring unloading, completely avoiding problems such as steel bar deformation and pitch deviation caused by traditional hard-pull spring unloading.

[0100] A third rotary drive 505 is installed on one side of the connecting frame 502. The second drive gear 506 mounted on its output end meshes with the second drive gear ring 507 on the outer side of the ring frame 501. When the unloading structure 5 drives the spring steel strip to move linearly along the winding roller 101, the third rotary drive 505 is activated. Through the precise transmission of the gear and gear ring, it drives the ring frame 501 to rotate, thereby pulling the spring steel strip clamped by the clamping plate 504 to rotate synchronously. This design ensures that the spring steel strip remains in a rotating state during the process of detaching from the winding roller 101, passing through the working area of ​​the post-winding treatment structure 404 at a uniform speed. This allows each turn and each part of the steel strip to receive stress treatment by temperature-controlled gas evenly, completely solving the problem of uneven stress distribution caused by traditional static over-treatment, allowing for more complete stress release and more stable steel strip shaping.

[0101] The fourth telescopic drive 503 ensures the stability and adaptability of the clamping plate 504, while the screw drive device 3 provides smooth and controllable linear unloading power to ensure that the steel bar is released without impact or deformation. The third rotary drive 505 achieves precise matching between the rotational speed and the linear speed of the unloading spring through gear and gear ring transmission, allowing the steel bar to rotate and move synchronously. The rotating connection design of the ring frame 501 and the connecting frame 502 meets the rotational requirements without affecting the stability of the linear motion. The close-fitting clamping of the clamping plate 504 avoids slippage or uneven local force during rotation and movement.

[0102] Furthermore, such as Figures 6 to 7 As shown, the winding roller 101 of the present invention is equipped with a limiting structure 6 at one end. The limiting structure 6 includes a fifth telescopic drive 601, a mounting frame 602, a limiting plate 603, a torsion spring 604, and a limiting groove 605. The fifth telescopic drive 601 is installed in a cavity opened at one end of the winding roller 101. The mounting frame 602 is installed at the output end of the fifth telescopic drive 601. The four limiting plates 603 are movably connected to the four arms of the mounting frame 602, and the limiting plates 603 and the arms are connected by torsion springs 604. The two parts of the limiting groove 605 are opened on one of the limiting plates 603 and the winding roller 101, and the limiting groove 605 is used to insert and fix the end of the spring steel strip. When the four limiting plates 603 rotate and retract on the four arms of the mounting frame 602, the wound spring steel strip passes through the limiting structure 6.

[0103] The limiting structure 6 also includes positioning rods 606 and positioning grooves 607; the four positioning rods 606 are respectively installed on the four limiting plates 603, and the four positioning rods 606 are respectively inserted into and connected in the four positioning grooves 607, and the four positioning grooves 607 are all opened at one end of the winding roller 101.

[0104] This invention constructs an integrated limiting system that achieves precise end positioning, stable winding constraint, and interference-free spring unloading by designing the limiting structure 6 at the end of the winding roller 101 and the winding and unloading spring assembly. This completely solves the pain points of insecure end fixing, the limiting structure 6 hindering spring unloading, and insufficient positioning accuracy during the winding of traditional spring steel bars, and significantly improves the stability and process continuity of spring steel bar winding.

[0105] The limiting structure 6 uses the cavity at one end of the winding roller 101 as the mounting base to form a functional closed loop. The fifth telescopic drive 601 is built into the cavity to provide telescopic power for the entire limiting structure 6. The mounting bracket 602 installed at its output end has four support arms. The four limiting plates 603 are movably connected to the support arms and are elastically linked to the support arms through the torsion spring 604. The torsion spring 604 provides a continuous reset force for the limiting plates 603 to ensure the limiting posture in the natural state. The limiting groove 605 is divided into two parts, which are respectively opened on one of the limiting plates 603 and the winding roller 101. At the beginning of winding, the end of the spring steel bar is inserted into the limiting groove 605. The end is fixed by the cooperation of the limiting plate 603 and the winding roller 101, which prevents the steel bar from slipping or shifting during the winding process and ensures the consistency of the winding pitch and shape. At the same time, the four limiting plates 603 are kept in the unfolded state under the action of the torsion spring 604, which forms a circumferential auxiliary constraint on the steel bar during the winding process and further improves the winding stability.

[0106] To enhance the motion accuracy of the limiting plate 603, the limiting structure 6 incorporates a mechanism for the engagement of positioning rods 606 and positioning grooves 607. Four positioning rods 606 are respectively installed on the four limiting plates 603 and inserted into the four positioning grooves 607 at one end of the winding roller 101. When the limiting plate 603 unfolds or retracts, the positioning rods 606 slide along the positioning grooves 607, forming a precise guiding constraint. This prevents the limiting plate 603 from shifting due to force or the action of the torsion spring 604, ensuring the alignment accuracy of the limiting groove 605 and the uniformity of the circumferential distribution of the limiting plate 603. This makes the fixing of the steel strip end more reliable and the winding constraint more stable.

[0107] After the spring steel bar is wound, the fifth telescopic drive 601 is activated, driving the mounting frame 602 to move out of the cavity of the winding roller 101. The movement of the spring steel bar pushes the limiting plate 603. At this time, the limiting plate 603 rotates and retracts synchronously, and the torsion spring 604 is compressed. After the limiting plate 603 retracts, it no longer blocks the spring steel bar, allowing the wound spring steel bar to pass smoothly through the limiting structure 6. This avoids the traditional limiting component from obstructing the unloading of the spring due to its protrusion, ensuring that the unloading structure 5 can smoothly clamp the steel bar and move linearly along the winding roller 101, achieving a seamless connection between the winding limiting and the unloading without interference.

[0108] The fifth telescopic drive 601 controls the unfolding and retraction of the limiting structure 6, adapting to the different process requirements of winding and unwinding; the torsion spring 604 ensures the elastic constraint when the limiting plate 603 is unfolded, and the positioning rod 606 and the positioning groove 607 ensure the motion accuracy; the limiting groove 605 realizes the precise fixing of the steel bar end, and the circumferential distribution of the four limiting plates 603 strengthens the winding constraint.

[0109] This invention solves the core problems of winding deviation and unloading spring caused by the insecure fixing of the traditional limiting structure 6 and the obstruction of unloading spring due to the protruding structure by designing the limiting structure 6 at the end of the winding roller 101 and the winding and unloading spring assembly, thus ensuring the continuity of the production process.

[0110] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A vertical coiling machine for helical springs of automobile shock absorbers, characterized in that, It comprises a winding assembly (1), a shaping assembly (2), a screw driving device (3) and a shaping end (4); The winding assembly (1) comprises a winding roller (101) with a spring steel strip wound thereon; The shaping assembly (2) comprises a housing (201), a second rotary drive (202), a first driving gear (203), a first driving gear ring (204), a sliding groove (205) and a guide rod (206); The second rotary drive (202) is installed in the housing (201), the first driving gear (203) is rotatably connected to the output end of the second rotary drive (202), the first driving gear ring (204) is meshingly connected to one side of the first driving gear (203), and the first driving gear ring (204) is rotatably connected in the housing (201), the sliding groove (205) is vertically installed in the first driving gear ring (204), and the guide rod (206) is slidably connected in the sliding groove (205), and the housing (201) is provided with a limiting guide groove (2011), and the other end of the guide rod (206) is slidably connected in the limiting guide groove (2011); The housing (201) is installed on the output end of the screw driving device (3), the shaping end (4) is installed on the other end of the guide rod (206), and the front end of the shaping end (4) is adapted to the spring steel strip; When the guide rod (206) slides in the limiting guide groove (2011), the shaping end (4) is driven to slide along the wound spring steel strip.

2. The vertical coiling machine for helical springs of automobile shock absorbers according to claim 1, characterized in that, The winding assembly (1) further comprises a platform (102), a stand (103) and a first rotary drive (104); The stand (103) is installed on the platform (102), and the first rotary drive (104) is installed on the stand (103), and the winding roller (101) is installed on the output end of the first rotary drive (104).

3. The vertical coiling machine for helical springs of automobile shock absorbers according to claim 1, characterized in that, The shaping end (4) comprises a shaping block (402), a pad (403) and a post-winding treatment structure (404); The shaping end (4) has a first deformation state and a second deformation state; in the first deformation state, the post-winding treatment structure (404) is retracted, the shaping block (402) and the pad (403) slide along the wound spring steel strip to shape the spring steel strip; in the second deformation state, the post-winding treatment structure (404) is extended, the post-winding treatment structure (404) slides along the winding roller (101), and the spring steel strip passes through the post-winding treatment structure (404) for stress treatment when being rotated and unloaded.

4. The vertical coil winding machine for automobile shock absorber coil spring according to claim 3, wherein The shaping end (4) further comprises a driving structure (401); The driving structure (401) comprises a frame (4011), a first telescopic drive (4012) and a driving block (4013); The frame body (4011) is mounted at the other end of the guide rod (206), two first telescopic drives (4012) are respectively mounted at the two sides of the frame body (4011), two drive blocks (4013) are respectively mounted at the output ends of the two first telescopic drives (4012), and the two drive blocks (4013) are both slidingly connected to the frame body (4011); Two styling blocks (402) are respectively mounted on the two drive blocks (4013); When the two drive blocks (4013) are located at the initial position, the two styling blocks (402) are tightened to adapt to the fine spring steel strip for new energy vehicles; When the two drive blocks (4013) are located at the terminal position, the two styling blocks (402) are unfolded to adapt to the thick spring steel strip for off-road vehicles.

5. The vertical coil winding machine for automobile shock absorber coil spring according to claim 3, wherein The cushion block (403) is arranged between the two drive blocks (4013), and the cushion block (403) is connected with a second telescopic drive (4014), the second telescopic drive (4014) is mounted in the frame body (4011), the middle part of the cushion block (403) is provided with a deformation plate (4031), and the inside of the cushion block (403) is provided with a cavity, the cavity of the cushion block (403) is communicated with a first air supply pipe (4032), and the first air supply pipe (4032) is connected with an external air supply device; When the first air supply pipe (4032) supplies air, the cavity of the cushion block (403) drives the deformation plate (4031) to deform and tightly press the spring steel strip.

6. A vertical coil winding machine for helical springs of automotive shock absorbers according to claim 4, characterized in that, The post-winding treatment structure (404) comprises a groove body (4041), an elastic hollow plate (4042), an exhaust hole (4043), a second air supply pipe (4044) and a third telescopic drive (4045); Two groove bodies (4041) are connected at the two sides of the frame body (4011), two elastic hollow plates (4042) are slidingly connected in the two groove bodies (4041), a plurality of exhaust holes (4043) are formed on one side of the elastic hollow plate (4042), the second air supply pipe (4044) is communicated on the elastic hollow plate (4042), and the second air supply pipe (4044) is connected with an external temperature control air supply device, the elastic hollow plate (4042) is mounted at the output end of the third telescopic drive (4045), and the third telescopic drive (4045) is mounted in the frame body (4011); When the two elastic hollow plates (4042) are stretched out, they are bent towards the two drive blocks (4013), forming a structure surrounding the spring steel strip; the two elastic hollow plates (4042) are connected with a groove (105), and the groove (105) is formed on the winding roller (101).

7. The vertical coil winding machine for automobile shock absorber coil spring according to claim 1, wherein One side of the winding assembly (1) is provided with a spring unloading structure (5), the spring unloading structure (5) comprises a ring frame (501), a connecting frame (502), a fourth telescopic drive (503) and a clamping plate (504); The ring frame (501) is rotationally connected to the connecting frame (502), the connecting frame (502) is installed on the other output end of the screw driving device (3), two fourth telescopic drives (503) are installed on the two sides of the ring frame (501) respectively, and two clamping plates (504) are installed on the output ends of the two fourth telescopic drives (503) respectively; the two clamping plates (504) are used for clamping the wound spring steel strip and driving the spring steel strip to move linearly along the winding roller (101).

8. A vertical coil winding machine for helical springs of automotive shock absorbers according to claim 7, characterized in that, The spring unloading structure (5) further comprises a third rotary drive (505), a second drive gear (506) and a second drive gear ring (507); The third rotary drive (505) is installed on one side of the connecting frame (502), the second drive gear (506) is installed on the output end of the third rotary drive (505), the second drive gear ring (507) is meshingly connected on one side of the second drive gear (506), and the second drive gear ring (507) is installed on the outer side of the ring frame (501); the second drive gear ring (507) is used for driving the clamped wound spring steel strip to rotate, so that the spring steel strip is subjected to stress treatment after winding.

9. The vertical coil winding machine for helical spring of automobile shock absorber according to claim 1, characterized in that, One end of the winding roller (101) is provided with a limiting structure (6), and the limiting structure (6) comprises a fifth telescopic drive (601), a mounting frame (602), a limiting plate (603), a torsional spring (604) and a limiting groove (605); The fifth telescopic drive (601) is installed in the cavity formed at one end of the winding roller (101), the mounting frame (602) is installed on the output end of the fifth telescopic drive (601), a plurality of limiting plates (603) are movably connected to a plurality of arms of the mounting frame (602), the limiting plates (603) and the arms are connected through the torsional springs (604), and two parts of the limiting groove (605) are formed on one of the limiting plates (603) and the winding roller (101), and the limiting groove (605) is used for inserting the end of the fixed spring steel strip; When the plurality of limiting plates (603) are rotated and folded on the plurality of arms of the mounting frame (602), the wound spring steel strip passes through the limiting structure (6).

10. The vertical coil winding machine for helical springs of a shock absorber for an automobile according to claim 9, wherein The limiting structure (6) further comprises a positioning rod (606) and a positioning groove (607); A plurality of positioning rods (606) are installed on a plurality of limiting plates (603), a plurality of positioning rods (606) are inserted into a plurality of positioning grooves (607), and a plurality of positioning grooves (607) are formed at one end of the winding roller (101).

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