Automobile seat spring steel wire bending mechanism and multi-point automatic bending forming device

Abstract

The utility model discloses a kind of automobile seat spring steel wire bending mechanism and multi-point automatic bending forming device, including outer turntable and the end clamp being set on the outer turntable, the outer turntable is connected by transmission structure with linear drive cylinder transmission, when linear drive cylinder telescoping action, can drive the outer turntable rotation, to realize the bending forming of transverse steel wire end by the end clamp.The utility model is dedicated to overcoming the limitation of prior art, provide a kind of automobile seat spring steel wire bending mechanism and multi-point automatic bending forming device.By integration outer turntable, end clamp and accurate transmission system, the quick and accurate bending of transverse steel wire end is realized.At the same time, multi-point automatic bending forming device can complete the bending processing of multiple transverse steel wire ends at a time, and each bending direction is compatible with processing requirement, without manual intervention, and then significantly improve production efficiency and product quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive seat spring steel wire processing equipment, and specifically relates to an automotive seat spring steel wire bending mechanism and a multi-point automatic bending and forming device. Background Technology

[0002] In the production process of automotive seat spring steel wire, the two ends of the transverse steel wire need to be bent quickly. Currently, most bending processes are performed manually or using a single tooling. However, these methods have many drawbacks and shortcomings, specifically as follows:

[0003] ① Manual bending has low production efficiency;

[0004] ② The poor precision of a single tooling makes it difficult to meet complex and ever-changing bending requirements, resulting in unstable product quality and increasing the difficulty and cost of subsequent processing.

[0005] In view of this, Chinese invention patent application CN202011143689.5 discloses a wire bending mechanism, which is mainly applicable to the curved bending of the wires on both sides of the spring steel wire in automobile seats. This bending mechanism is assembled from a housing, an outer turntable, a mounting plate, a pressure rod, a rotary cylinder, a cylindrical mounting block, reinforcing ribs, a housing bottom cover, a motor, a worm gear, a turbine, a bending block, an upper mandrel body, a fixed copper sleeve, a needle roller bearing, a lower mandrel body, a lever, a housing top cover, a pull claw, a lower mandrel fixing block, a pressure bearing, a bearing fixing seat, a coupling, a telescopic cylinder, an outer rotating sleeve, and an oil port sealing cover. This solution reduces production costs and improves production efficiency.

[0006] However, the aforementioned wire bending mechanism relies on a motor driven by a worm gear reducer, resulting in a long mechanical transmission chain. This leads to drawbacks such as high inertial delay and long single bending cycles, making it difficult to meet the demands of high-speed production. Furthermore, the backlash in the worm gear meshing causes significant bending angle errors, failing to meet the high precision requirements of automotive seat spring wire. Simultaneously, the worm gear experiences severe wear and requires frequent lubrication and maintenance, impacting production efficiency. Additionally, the motor consumes a lot of energy during continuous operation, and the high-speed rotation of the worm gear generates considerable noise, which does not comply with green manufacturing standards.

[0007] On the other hand, in the production process of automotive seat spring steel wire, multiple ends need to be bent (at least including...). Figure 1 and Figure 2 The ends are labeled B, C, D, G, H, and I, and the bending direction of each end is not the same. If only the wire bending mechanism described above is used, each end can only be bent one by one, and the bending direction still needs to be adjusted manually. As a result, it is difficult to avoid the problems of cumbersome operation and high product defect rate. Utility Model Content

[0008] This invention aims to overcome the limitations of existing technologies by providing a bending mechanism for automotive seat spring steel wires and a multi-point automatic bending and forming device. By integrating an outer turntable, end clamps, and a precision transmission system, it achieves rapid and accurate bending of the transverse steel wire ends. Simultaneously, the multi-point automatic bending and forming device can complete the bending of multiple transverse steel wire ends simultaneously, with each bending direction matching the processing requirements, eliminating the need for manual intervention and significantly improving production efficiency and product quality.

[0009] To achieve the above objectives, this utility model first provides a bending mechanism for automotive seat spring steel wire, including an outer turntable and an end clamp set on the outer turntable. The key feature is that the outer turntable is connected to a linear drive cylinder through a transmission structure. When the linear drive cylinder performs a telescopic action, it can drive the outer turntable to rotate, so as to achieve bending and forming of the transverse steel wire end through the end clamp.

[0010] Furthermore, the transmission structure includes a precision rack and a backlash-free gear that mesh with each other. The precision rack is connected to the piston rod of the linear drive cylinder, and the backlash-free gear is coaxially sleeved on the spindle of the outer turntable.

[0011] Furthermore, the linear drive cylinder is a high-speed cylinder, and the piston rod extension stroke of the high-speed cylinder is adjustable to adapt to bending requirements.

[0012] Furthermore, the end clamp consists of an upper section of a mandrel and a bending shaft, with the reserved gap between the two serving as the clamping space for the transverse steel wire end.

[0013] Furthermore, the middle section of the bending shaft is recessed to form an annular groove that engages the end of the transverse steel wire.

[0014] Secondly, this utility model also discloses a multi-point automatic bending and forming device, the key of which is: it includes a wire fixing mechanism, on which the car seat spring wire bending mechanism is provided one-to-one for the end of each transverse wire, and the orientation of each car seat spring wire bending mechanism is consistent with the bending direction of the corresponding transverse wire end.

[0015] Preferably, the avoidance mechanism includes a vertical cylinder, a first longitudinal cylinder, and a second longitudinal cylinder. The vertical cylinder is connected to the car seat spring wire bending mechanism corresponding to end C and end H through a vertical guide structure. The first longitudinal cylinder is connected to the car seat spring wire bending mechanism corresponding to end D and end G through a first longitudinal guide structure. The second longitudinal cylinder is connected to the car seat spring wire bending mechanism corresponding to end B and end I through a second longitudinal guide structure.

[0016] Preferably, the vertical guide structure includes a guide frame and a lifting platform connected to the vertical guide column of the guide frame. The lifting platform is connected to the bending mechanism of the car seat spring wire corresponding to end C and end H, and multiple flexible abutment rods extend vertically downward at the bottom of the lifting platform for abutting the car seat spring wire. The first longitudinal guide structure includes a first longitudinal slide and a first longitudinal sliding seat slidably connected to the first longitudinal slide. The first longitudinal sliding seat is connected to the bending mechanism of the car seat spring wire corresponding to end D and end G. The second longitudinal guide structure includes a second longitudinal slide and a second longitudinal sliding seat slidably connected to the second longitudinal slide. The second longitudinal sliding seat is connected to the bending mechanism of the car seat spring wire corresponding to end B and end I.

[0017] Compared with the prior art, the significant advantages of this utility model are:

[0018] 1. The automotive seat spring wire bending mechanism provided by this utility model significantly improves transmission accuracy and response speed through a transmission structure composed of a linear drive cylinder, a precision rack, and a backlash-free gear. Compared with the traditional motor worm gear drive method, this utility model effectively shortens the mechanical transmission chain, reduces inertial delay, and greatly shortens the single bending cycle, thereby greatly meeting the needs of high-speed production.

[0019] 2. The application of backlash-free gears effectively eliminates transmission backlash, ensuring the accuracy of bending angles and improving product quality. Furthermore, the direct drive method of linear cylinders simplifies the mechanical structure, reduces wear and lubrication maintenance frequency, and further improves production efficiency. In terms of energy consumption, the intermittent working mode of linear cylinders significantly reduces energy consumption compared to motor drives, and also produces lower operating noise, meeting green manufacturing standards.

[0020] 3. The design of the multi-point automatic bending and forming device enables one-time bending processing of multiple transverse steel wire ends. By setting a corresponding automotive seat spring steel wire bending mechanism for each transverse steel wire end, and with the orientation of each bending mechanism matching the bending direction of the transverse steel wire end, complex and varied bending requirements can be met without manual intervention. This design not only simplifies the operation process and reduces operational difficulty, but also significantly improves production efficiency and product quality. Simultaneously, the avoidance mechanism provides ample space for steel wire loading and unloading, and effectively avoids mutual interference between bending mechanisms, ensuring the stability and safety of the production process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural diagram of a car seat spring wire product before bending.

[0023] Figure 2 This is a schematic diagram of the structure of automotive seat spring steel wire products after bending.

[0024] Figure 3 This is a schematic diagram of the bending mechanism of the car seat spring wire in Example 1 (I);

[0025] Figure 4 This is a schematic diagram (II) of the bending mechanism for the steel wire springs of the car seat in Example 1;

[0026] Figure 5 This is a front view (a) of the multi-point automatic bending and forming device in Embodiment 2;

[0027] Figure 6 This is a front view (II) of the multi-point automatic bending and forming device in Embodiment 2;

[0028] Figure 7 This is a perspective view of the main components of the multi-point automatic bending and forming device in Embodiment 2;

[0029] Figure 8 This is a top view of the multi-point automatic bending and forming device in Embodiment 2;

[0030] Figure 9 This is a perspective view (I) of the multi-point automatic bending and forming device in Embodiment 2;

[0031] Figure 10 This is a perspective view (II) of the multi-point automatic bending and forming device in Embodiment 2;

[0032] The diagram is labeled as follows: 1-Car seat spring wire bending mechanism, 101-Outer turntable, 102-End clamp, 103-Transmission structure, 104-Linear drive cylinder, 1031-Precision rack, 1032-Backlash-free gear, 1021-Bending shaft, 1022-Annular groove, 2-Wire fixing mechanism, 3-Avoidance mechanism, 301-Vertical cylinder, 302-First longitudinal cylinder, 303-Second longitudinal cylinder, 304-Vertical guide structure, 305-First longitudinal guide structure, 306-Second longitudinal guide structure, 3041-Guide frame, 3042-Lifting platform, 3043-Flexible abutment rod, 3051-First longitudinal slide, 3052-First longitudinal sliding seat, 3061-Second longitudinal slide, 3062-Second longitudinal sliding seat. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Figure 3 and Figure 4 The first embodiment of the present invention is shown: a bending mechanism 1 for automotive seat spring steel wire, including an outer turntable 101 and an end clamp 102 disposed on the outer turntable 101. The outer turntable 101 is connected to a linear drive cylinder 104 via a transmission structure 103. When the linear drive cylinder 104 performs a telescopic action, it can drive the outer turntable 101 to rotate, so as to achieve bending and forming of the transverse steel wire end through the end clamp 102.

[0036] In a specific implementation, the transmission structure 103 includes a precision rack 1031 and a backlash-free gear 1032 that mesh with each other. The precision rack 1031 is connected to the piston rod of the linear drive cylinder 104, and the backlash-free gear 1032 is coaxially sleeved on the spindle of the outer turntable 101.

[0037] In this embodiment, the combined use of the precision rack 1031 and the backlash-free gear 1032 significantly improves the accuracy and stability of the transmission system. The precision rack 1031, with its high-precision tooth profile design, ensures accurate meshing with the backlash-free gear 1032, effectively reducing error accumulation during transmission. The application of the backlash-free gear 1032 further eliminates the backlash problem present in traditional gear transmissions, making the entire transmission system more compact and efficient. In specific implementation, one end of the precision rack 1031 is tightly connected to the piston rod of the linear drive cylinder 104. As the piston rod extends and retracts, the precision rack 1031 moves smoothly along the fixed guide structure. Simultaneously, the backlash-free gear 1032 is coaxially sleeved on the spindle of the outer turntable 101, rotating with the rotation of the outer turntable 101. When the precision rack 1031 moves, its tooth profile meshes with the tooth profile of the backlash-free gear 1032, driving the backlash-free gear 1032 and the outer turntable 101 to rotate, thereby precisely bending the end of the transverse steel wire through the end clamp 102.

[0038] Preferably, the linear drive cylinder 104 is a high-speed cylinder with an adjustable piston rod extension stroke to adapt to bending requirements. The rapid response of the high-speed cylinder further improves bending efficiency and ensures smooth production. By adjusting the piston rod stroke, bending requirements for different specifications of steel wire can be flexibly met, demonstrating the flexibility and adaptability of the mechanism design. The synergistic effect of the precision rack 1031 and the backlash-free gear 1032 not only ensures bending accuracy but also extends the equipment's service life and reduces maintenance costs.

[0039] Specifically, the end clamp 102 consists of an upper section of a mandrel and a bending shaft 1021, with a pre-reserved gap between them serving as the clamping space for the transverse steel wire end. When bending the transverse steel wire end, the upper section of the mandrel and the bending shaft 1021 work together on the steel wire to ensure its stability under stress. The design of the upper section of the mandrel fully considers the diameter and material of the steel wire to ensure moderate clamping force, preventing damage to the wire surface while maintaining bending accuracy. The design of the bending shaft 1021 focuses more on controlling the bending angle and direction. Through precise calculation and adjustment, the bent transverse steel wire end meets specific shape and size requirements. Furthermore, the middle section of the bending shaft 1021 is recessed to form an annular groove 1022 for engaging the transverse steel wire end. The design of the annular groove 1022 enhances the fixing effect of the end clamp 102 on the transverse wire end, effectively preventing the wire from slipping or shifting during bending, and further improving the accuracy and stability of bending. The size and shape of the annular groove 1022 are perfectly matched with the transverse wire end, thereby achieving the best clamping effect.

[0040] Figures 5 to 10A second embodiment of the present invention is shown: a multi-point automatic bending and forming device, including a wire fixing mechanism 2. On the wire fixing mechanism 2, a bending mechanism 1 for the automotive seat spring wire described above is provided corresponding to the end of each transverse wire. The orientation of each bending mechanism 1 matches the bending direction of the corresponding transverse wire end. The wire fixing mechanism 2 includes a magnetic plate, and positioning grooves adapted to the mesh of the automotive seat spring wire are provided on both the left and right sides of the magnetic plate.

[0041] In practice, the wire fixing mechanism 2 stably supports the entire row of steel wires (automotive seat spring steel wires), providing a solid foundation for subsequent bending operations. Each automotive seat spring steel wire bending mechanism 1 is precisely installed in a predetermined position, and its orientation is precisely calculated to ensure complete consistency with the bending direction of the corresponding transverse steel wire end. This one-to-one correspondence and directional alignment design greatly improves the accuracy and efficiency of bending, reduces the need for manual adjustments, and lowers the difficulty and complexity of operation.

[0042] Please refer to Figures 8 to 10 In this embodiment, to cope with complex and ever-changing bending requirements and ensure the stability and safety of the production process, the multi-point automatic bending and forming device of this utility model is also cleverly equipped with an obstacle avoidance mechanism 3. The obstacle avoidance mechanism 3 includes key components such as a vertical cylinder 301, a first longitudinal cylinder 302, and a second longitudinal cylinder 303. The vertical cylinder 301 is connected to the car seat spring wire bending mechanism 1 corresponding to the C end and the H end through a vertical guide structure 304. The first longitudinal cylinder 302 is connected to the car seat spring wire bending mechanism 1 corresponding to the D end and the G end through a first longitudinal guide structure 305. The second longitudinal cylinder 303 is connected to the car seat spring wire bending mechanism 1 corresponding to the B end and the I end through a second longitudinal guide structure 306. Specifically, the vertical guide structure 304 includes a guide frame 3041 and a lifting platform 3042 connected to the vertical guide column of the guide frame 3041. The lifting platform 3042 is connected to the car seat spring wire bending mechanism 1 corresponding to the C end and the H end, and multiple flexible abutment rods 3043 extend vertically downward at the bottom of the lifting platform 3042 for abutting the car seat spring wire. The first longitudinal guide structure 305 includes a first longitudinal slide 3051 and a first longitudinal sliding seat 3052 slidably connected to the first longitudinal slide 3051. The first longitudinal sliding seat 3052 is connected to the car seat spring wire bending mechanism 1 corresponding to the D end and the G end. The second longitudinal guide structure 306 includes a second longitudinal slide 3061 and a second longitudinal sliding seat 3062 slidably connected to the second longitudinal slide 3061. The second longitudinal sliding seat 3062 is connected to the car seat spring wire bending mechanism 1 corresponding to the B end and the I end.

[0043] In this embodiment, the design of the vertical guide structure 304, the first longitudinal guide structure 305, and the second longitudinal guide structure 306 not only ensures the precise positioning of each bending mechanism during the bending process but also provides them with a stable motion trajectory. The vertical guide structure 304, through the cooperation of the guide frame 3041 and the lifting platform 3042, achieves precise vertical movement of the bending mechanisms corresponding to the C-end and H-end. The lifting platform 3042 smoothly rises and falls on the vertical guide column of the guide frame 3041, ensuring precise adjustment of the bending mechanism in the height direction to facilitate the loading and unloading of spring steel wire. The first longitudinal guide structure 305 and the second longitudinal guide structure 306, through the cooperation of the first longitudinal slide 3051 and the first longitudinal sliding seat 3052, and the second longitudinal slide 3061 and the second longitudinal sliding seat 3062, respectively, achieve precise horizontal movement of the bending mechanisms corresponding to the D-end and G-end, and the B-end and I-end, thereby avoiding interference. The flexible abutment rod 3043 assists in pressing and fixing the steel wire of the car seat spring, effectively reducing wire swaying during the pressing process and further improving bending accuracy. Simultaneously, the material and elasticity design of the flexible abutment rod 3043 fully considers the rigidity and surface hardness of the steel wire, ensuring no damage is caused during pressing. Furthermore, the coordinated action of the vertical cylinder 301, the first longitudinal cylinder 302, and the second longitudinal cylinder 303 in the avoidance mechanism 3 ensures that each bending mechanism can quickly and accurately adjust its position under complex and varied bending requirements, thereby efficiently completing the bending task. The selection and layout of the cylinders fully consider the balance between production efficiency and ease of operation, making the entire multi-point automatic bending and forming device exhibit extremely high flexibility and adaptability in practical applications.

[0044] In summary, the automotive seat spring wire bending mechanism 1 provided by this utility model, through the transmission structure 103 composed of a linear drive cylinder 104, a precision rack 1031, and a backlash-free gear 1032, significantly improves transmission accuracy and response speed. Compared with the traditional motor worm gear drive method, this utility model effectively shortens the mechanical transmission chain, reduces inertial delay, and significantly shortens the single bending cycle, thereby greatly meeting the needs of high-speed production. The application of the backlash-free gear 1032 effectively eliminates transmission backlash, ensuring the accuracy of the bending angle and improving product quality. In addition, the direct drive method of the linear drive cylinder 104 simplifies the mechanical structure, reduces wear and lubrication maintenance frequency, and further improves production efficiency. In terms of energy consumption, the intermittent working mode of the linear drive cylinder 104 significantly reduces energy consumption compared with motor drive, and has lower operating noise, meeting green manufacturing standards. The design of the multi-point automatic bending and forming device realizes one-time bending processing of multiple transverse wire ends. By setting a corresponding automotive seat spring wire bending mechanism 1 at the end of each transverse steel wire, and ensuring that the orientation of each bending mechanism matches the bending direction of the transverse steel wire end, complex and varied bending requirements can be met without manual intervention. This design not only simplifies the operation process and reduces operational difficulty, but also significantly improves production efficiency and product quality. Meanwhile, the avoidance mechanism 3 provides ample space for loading and unloading the steel wires and effectively prevents interference between the bending mechanisms, ensuring the stability and safety of the production process.

[0045] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A bending mechanism for automotive seat spring wire, comprising an outer turntable and an end clamp disposed on the outer turntable, characterized in that: The outer turntable is connected to the linear drive cylinder via a transmission structure. When the linear drive cylinder extends or retracts, it drives the outer turntable to rotate, thereby bending and forming the transverse steel wire end through the end clamp. The transmission structure includes a precision rack and a backlash-free gear that mesh with each other. The precision rack is connected to the piston rod of the linear drive cylinder, and the backlash-free gear is coaxially sleeved on the spindle of the outer turntable.

2. The automotive seat spring wire bending mechanism according to claim 1, characterized in that: The linear drive cylinder is a high-speed cylinder, and the piston rod extension stroke of the high-speed cylinder is adjustable to adapt to bending requirements.

3. The automotive seat spring wire bending mechanism according to claim 1 or 2, characterized in that: The end clamp consists of an upper section of a mandrel and a bending shaft, with a reserved gap between them serving as the clamping space for the transverse steel wire end.

4. The automotive seat spring wire bending mechanism according to claim 3, characterized in that: The middle section of the bending shaft is recessed to form an annular groove that engages with the end of the transverse steel wire.

5. A multi-point automatic bending and forming device, characterized in that: The system includes a wire fixing mechanism, on which a bending mechanism for the automotive seat spring wire as described in any one of claims 1-4 is provided for each end of the transverse wire, and the orientation of each bending mechanism is consistent with the bending direction of the corresponding transverse wire end.

6. The multi-point automatic bending and forming device according to claim 5, characterized in that: An obstacle avoidance mechanism is also provided between each of the automotive seat spring wire bending mechanisms. The obstacle avoidance mechanism is used to form a space for loading and unloading the steel wire, and to avoid mutual interference between the automotive seat spring wire bending mechanisms.

7. The multi-point automatic bending and forming device according to claim 6, characterized in that: The avoidance mechanism includes a vertical cylinder, a first longitudinal cylinder, and a second longitudinal cylinder. The vertical cylinder is connected to the car seat spring wire bending mechanism corresponding to end C and end H through a vertical guide structure. The first longitudinal cylinder is connected to the car seat spring wire bending mechanism corresponding to end D and end G through a first longitudinal guide structure. The second longitudinal cylinder is connected to the car seat spring wire bending mechanism corresponding to end B and end I through a second longitudinal guide structure.

8. The multi-point automatic bending and forming device according to claim 7, characterized in that: The vertical guide structure includes a guide frame and a lifting platform connected to the vertical guide column of the guide frame. The lifting platform is connected to the bending mechanism of the car seat spring steel wire corresponding to end C and end H. Multiple flexible abutment rods extend vertically downwards at the bottom of the lifting platform for abutting the car seat spring steel wire. The first longitudinal guide structure includes a first longitudinal slide and a first longitudinal sliding seat slidably connected to the first longitudinal slide. The first longitudinal sliding seat is connected to the bending mechanism of the car seat spring steel wire corresponding to end D and end G. The second longitudinal guide structure includes a second longitudinal slide and a second longitudinal sliding seat slidably connected to the second longitudinal slide. The second longitudinal sliding seat is connected to the bending mechanism of the car seat spring steel wire corresponding to end B and end I.

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