Lightweight wiper flat wire structure with weight reduction hole array and stamping positioning tooling
Patent Information
- Application Number
- CN202522422925.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-14
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-14
AI Technical Summary
[0003]然而，当前雨刷扁线结构及加工工装存在明显技术问题：一方面，实心钢片结构重量较大，不符合汽车行业轻量化发展趋势，增加了雨刷电机的负载，长期使用易导致电机损耗加剧；且传统扁线与雨刷架的连接多依赖单一卡扣或螺栓，装配后稳定性不足，易因振动出现松动，影响刮拭精度
1.本实用新型提出的一种带减重孔阵列的轻量化雨刷扁线结构及其冲压定位工装通过在扁线钢片两侧设置对称减重孔，结合中部半圆柱加强筋，既实现了扁线轻量化，又通过加强筋弥补了减重带来的强度损失，同时对称卡口增强了与雨刷架连接件的装配可靠性，解决了传统实心扁线重量大、连接易松动的问题；
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Figure CN224895374U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts application technology, and in particular to a lightweight wiper flat wire structure with a weight-reducing hole array and its stamping positioning fixture. Background Technology
[0002] The wiper blade cable is a core load-bearing component of a car's wiper system. It primarily supports the wiper blade and transmits driving force, ensuring stable wiping of the windshield. Most existing wiper blade cables utilize a one-piece solid steel sheet structure, formed through a stamping process and directly assembled to the wiper arm connector. Their structural design must balance strength and ease of assembly to withstand the complex conditions of vibration and wind during vehicle operation.
[0003] However, current wiper wire structures and processing fixtures have significant technical problems: On the one hand, the solid steel sheet structure is heavy, which does not conform to the automotive industry's trend towards lightweighting, increases the load on the wiper motor, and can easily lead to accelerated motor wear with long-term use; moreover, the connection between the traditional flat wire and the wiper frame mostly relies on a single clip or bolt, which lacks stability after assembly and is prone to loosening due to vibration, affecting wiping accuracy. On the other hand, the stamping fixtures used for processing the flat wire are mostly designed with fixed specifications, which cannot be adjusted according to the width differences of wiper wires for different vehicle models, resulting in poor versatility; at the same time, the fixture positioning structure is simple, and the flat wire is prone to displacement during stamping, resulting in insufficient positional accuracy of key structures such as weight reduction holes and clamps, requiring additional adjustments during subsequent assembly and reducing production efficiency.
[0004] Therefore, this utility model proposes a lightweight wiper flat wire structure with a weight-reducing hole array and its stamping positioning fixture. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a lightweight wiper flat wire structure with a weight-reducing hole array and its stamping positioning fixture, so as to realize the lightweight design of the wiper flat wire, ensure structural strength and assembly reliability, and at the same time meet the precise stamping processing requirements of flat wire steel sheets of different specifications.
[0006] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a lightweight wiper flat wire structure with a weight-reducing hole array is provided, including a flat wire steel sheet, and two sets of weight-reducing holes penetrating the thickness of the flat wire steel sheet are opened in the length direction of the flat wire steel sheet. The two sets of weight-reducing holes are respectively located on both sides of the flat wire steel sheet to achieve weight reduction and lightness of the entire flat wire steel sheet. The flat steel sheet has symmetrical slots on both sides near the ends for reliable connection with the wiper frame connector.
[0007] The present invention is further configured such that: reinforcing ribs are fixedly connected to the upper and lower surfaces of the middle part of the flat wire steel sheet, and both reinforcing ribs are semi-cylindrical, while the two sets of weight-reducing holes are symmetrically arranged about the reinforcing ribs.
[0008] Through the above technical solution, the semi-cylindrical reinforcing ribs are fixed to the upper and lower surfaces of the middle part of the flat wire steel sheet. Their arc-shaped structure can disperse the external force, significantly improve the bending strength and structural rigidity of the flat wire steel sheet, and make up for the impact of opening weight-reducing holes on the local structural strength. The two sets of weight-reducing holes are symmetrically arranged about the reinforcing ribs, which can make the stress distribution of the flat wire steel sheet more uniform, avoid local stress concentration, extend the service life of the flat wire steel sheet, and prevent failures such as breakage after long-term use.
[0009] The present invention is further configured such that the two sets of weight-reducing holes are shaped and positioned in one of the following shapes: circular, elliptical, rhomboid, or rectangular.
[0010] Based on the above technical solutions, the shape of the weight reduction hole can be flexibly selected according to the actual use scenario of the wiper flat wire, the difficulty of the stamping process, and the appearance design requirements: the round and elliptical structures are smooth and can minimize the risk of stress concentration, which is suitable for scenarios with high requirements for structural stability; the rhomboid and rectangular shapes can maximize the weight reduction area and improve the lightweight effect, which is suitable for scenarios with strict weight control requirements, and enhances the flexibility and adaptability of product design.
[0011] A stamping positioning fixture for a lightweight wiper flat wire structure with a weight reduction hole array includes a mounting plate. Adjustment limit frames are symmetrically arranged on the top of the mounting plate near the middle position. Multiple guide components are arranged at equal intervals on the top of the two adjustment limit frames. Adjustment mechanisms are provided on the side walls of the two adjustment limit frames. The width of the flat steel sheet is adjusted by adjusting the limiting bracket on the mounting plate through the adjusting mechanism, forming a stamping channel for the flat steel sheet to pass through, and the flat steel sheet is stably fixed in the stamping channel by the guide component to realize the stamping operation.
[0012] The present invention is further configured such that: the guide component includes a mounting groove opened on the top of the adjusting limit frame, the inner wall of the mounting groove is symmetrically provided with slots near the top position, and an elastic frame is engaged and connected inside the slots, and a guide wheel is rotatably connected to one side of the elastic frame near the bottom position, and the bottom of the guide wheel is smoothly attached to the top of the flat wire steel sheet.
[0013] Through the above technical solution, the mounting slot provides installation space for the guide component, and the snap-fit connection between the slot and the elastic frame facilitates the disassembly, replacement, and maintenance of the elastic frame. The elastic frame has a certain elastic deformation capability, which allows the guide wheel to always be in close contact with the top surface of the flat steel sheet. Even if there are slight dimensional errors in the flat steel sheet, stable positioning can be achieved. The rotation structure of the guide wheel converts the sliding friction during the flat steel sheet conveying process into rolling friction, which greatly reduces the conveying resistance and avoids scratches or damage to the surface of the flat steel sheet due to friction. At the same time, it ensures that the flat steel sheet moves smoothly along the stamping channel, further improving the stamping accuracy.
[0014] The present invention is further configured such that: the adjustment mechanism includes a lead screw rotatably connected to the middle position of the adjustment limit frame, a fixing block is threadedly connected to the outer wall of the lead screw, the lead screw passes through the fixing block fixed on the mounting plate, and an adjustment knob is fixedly connected to the end face of the lead screw, and a slide is symmetrically fixedly connected to the adjustment limit frame near the end face on the same side of the lead screw, and the two slides are slidably connected to the corresponding slide rail fixed on the top of the mounting plate.
[0015] Through the above technical solution, the operator can rotate the adjustment knob to drive the lead screw to rotate synchronously. By utilizing the threaded engagement between the lead screw and the fixed block, the rotational motion of the lead screw is converted into the linear motion of the adjustment limit frame, thereby achieving precise control of the position of the adjustment limit frame. The symmetrically arranged slide and slide rail form a sliding guide structure, which restricts the movement direction of the adjustment limit frame, prevents the adjustment limit frame from tilting or deviating during movement, and ensures that the two adjustment limit frames always remain parallel. This, in turn, ensures that the width of the stamping channel is uniform and improves the positioning accuracy of the tooling for the flat wire steel sheet.
[0016] The present invention is further configured such that the cross-sections of the two adjusting limit brackets are both L-shaped, and their bottoms are smoothly adjusted to the top of the mounting plate.
[0017] Through the above technical solution, the L-shaped cross-section adjustment limit frame forms a horizontal limiting part and a vertical support part: the horizontal limiting part can fit against the side of the flat steel sheet to limit the flat steel sheet laterally and prevent it from moving left and right during the stamping process; the vertical support part fits smoothly against the top of the mounting plate, reducing the frictional resistance when the adjustment limit frame moves, making the movement of the adjustment limit frame on the mounting plate smoother, while improving the structural stability of the adjustment limit frame itself, avoiding deformation after long-term use, and ensuring the service life and processing accuracy of the tooling.
[0018] The beneficial effects of this utility model are as follows: 1. The lightweight wiper flat wire structure with weight-reducing hole array and its stamping positioning fixture proposed in this utility model achieves the weight reduction of the flat wire by setting symmetrical weight-reducing holes on both sides of the flat wire steel sheet and combining it with the semi-cylindrical reinforcing rib in the middle. At the same time, the symmetrical bayonet enhances the assembly reliability with the wiper frame connector and solves the problems of heavy weight and easy loosening of traditional solid flat wires. 2. The lightweight wiper flat wire structure with weight-reducing hole array proposed in this utility model and its stamping positioning fixture achieve the processing adaptation of flat wire steel sheets of different widths through the cooperation of the adjusting limit frame driven by the screw, the slide and the slide rail. Moreover, the guiding component composed of the elastic frame and the guide wheel can stably limit and smoothly transport the flat wire steel sheet, ensuring stamping accuracy, and solving the problems of poor versatility and low positioning accuracy of traditional fixed fixtures. Attached Figure Description
[0019] Figure 1 This is a structural diagram of a lightweight wiper flat wire structure with a weight-reducing hole array according to the present invention; Figure 2 This is the first structural diagram of a lightweight wiper flat wire structure stamping positioning tool with a weight-reducing hole array according to the present invention. Figure 3 This is a second structural diagram of a lightweight wiper flat wire structure stamping positioning tool with a weight-reducing hole array according to the present invention; Figure 4 This is the third structural diagram of a lightweight wiper flat wire structure stamping positioning fixture with a weight-reducing hole array according to this utility model.
[0020] In the diagram: 1. Flat steel sheet; 11. Reinforcing rib; 12. Weight reduction hole; 13. Bayonet; 2. Mounting plate; 3. Adjustment limit frame; 4. Guide assembly; 41. Mounting groove; 42. Slot; 43. Elastic frame; 44. Guide wheel; 5. Adjustment mechanism; 51. Lead screw; 52. Fixing frame; 53. Adjustment knob; 54. Slide; 55. Slide rail. Detailed Implementation
[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.
[0022] like Figure 1As shown, a lightweight wiper wire structure with a weight-reducing hole array includes a flat steel sheet 1. Two sets of weight-reducing holes 12 are formed along the length of the flat steel sheet 1, penetrating the thickness of the flat steel sheet 1. The two sets of weight-reducing holes 12 are located on both sides of the flat steel sheet 1 to achieve weight reduction and lightweighting of the entire flat steel sheet 1. The shape of the two sets of weight-reducing holes 12 can be one of circular, elliptical, rhomboid, or rectangular. The shape of the weight-reducing holes 12 can be flexibly selected according to the actual use scenario of the wiper wire, the difficulty of the stamping process, and the appearance design requirements: circular and elliptical structures are rounded and can minimize the risk of stress concentration, which is suitable for scenarios with high requirements for structural stability; rhomboid and rectangular structures can maximize the weight reduction area and improve the lightweighting effect, which is suitable for scenarios with strict weight control requirements, and enhances the flexibility and adaptability of product design. The flat steel sheet 1 has symmetrically provided slots 13 on both sides near the ends for reliable connection with the wiper bracket connector. Reinforcing ribs 11 are fixedly connected to the upper and lower surfaces of the middle part of the flat steel sheet 1, and both reinforcing ribs 11 are semi-cylindrical. Simultaneously, two sets of weight-reducing holes 12 are symmetrically arranged about the reinforcing ribs 11. The semi-cylindrical reinforcing ribs 11 are fixed to the upper and lower surfaces of the middle part of the flat steel sheet 1, and their arc-shaped structure can disperse external forces, significantly improving the bending strength and structural rigidity of the flat steel sheet 1, and compensating for the impact of the weight-reducing holes 12 on the local structural strength. The symmetrical arrangement of the two sets of weight-reducing holes 12 about the reinforcing ribs 11 makes the stress distribution of the flat steel sheet 1 more uniform, avoids local stress concentration, extends the service life of the flat steel sheet 1, and prevents malfunctions such as breakage after long-term use.
[0023] like Figure 2 As shown, a stamping positioning fixture for a lightweight wiper flat wire structure with a weight-reducing hole array includes a mounting plate 2. Adjustable limiting frames 3 are symmetrically arranged near the center of the top of the mounting plate 2. Multiple guide components 4 are arranged at equal intervals on the top of each of the two adjustable limiting frames 3. Adjustment mechanisms 5 are provided on the side walls of each of the two adjustable limiting frames 3. The width of the flat wire steel sheet 1 is adjusted on the mounting plate 2 by adjusting the adjusting limiting frames 3 through the adjustment mechanisms 5 to form a stamping channel for the flat wire steel sheet 1 to pass through. The flat wire steel sheet 1 is stably fixed in the stamping channel by the guide components 4 to realize the stamping operation.
[0024] like Figure 3As shown, the guide assembly 4 includes a mounting groove 41 on the top of the adjusting limit frame 3. A slot 42 is symmetrically provided on the inner wall of the mounting groove 41 near the top, and an elastic frame 43 is engaged within the slot 42. A guide wheel 44 is rotatably connected to one side of the elastic frame 43 near the bottom. The bottom of the guide wheel 44 smoothly fits against the top of the flat steel sheet 1. The mounting groove 41 provides installation space for the guide assembly 4. The engaging connection between the slot 42 and the elastic frame 43 facilitates the disassembly, replacement, and maintenance of the elastic frame 43. The elastic frame 43 has a certain elastic deformation capacity, ensuring that the guide wheel 44 always fits tightly against the top surface of the flat steel sheet 1. Even if the flat steel sheet 1 has slight dimensional errors, stable positioning can be achieved. The rotating structure of the guide wheel 44 converts the sliding friction of the flat steel sheet 1 during conveying into rolling friction, significantly reducing conveying resistance and preventing scratches or damage to the surface of the flat steel sheet 1 due to friction. Simultaneously, it ensures that the flat steel sheet 1 moves smoothly along the stamping channel, further improving stamping accuracy.
[0025] like Figure 4 As shown, the adjustment mechanism 5 includes a lead screw 51 rotatably connected to the middle of the adjustment limit frame 3. A fixing block 52 is threadedly connected to the outer wall of the lead screw 51. The lead screw 51 passes through the fixing block 52 fixed on the mounting plate 2, and an adjustment knob 53 is fixedly connected to its end face. The adjustment limit frame 3 is symmetrically fixedly connected to a slide 54 on the same side of the lead screw 51 near its end face. The two slides 54 are slidably connected to a corresponding slide rail 55 fixed on the top of the mounting plate 2. When the operator rotates the adjustment knob 53, the lead screw 51 can rotate synchronously. By utilizing the threaded engagement between the lead screw 51 and the fixing block 52, the rotational motion of the lead screw 51 is converted into the linear motion of the adjustment limit frame 3, thereby achieving precise control of the position of the adjustment limit frame 3. The symmetrically arranged slides 54 and slide rail 55 form a sliding guide structure, which restricts the direction of movement of the adjustment limit frame 3, prevents the adjustment limit frame 3 from tilting or deviating during movement, and ensures that the two adjustment limit frames 3 always remain parallel, thereby ensuring uniform width of the stamping channel and improving the positioning accuracy of the tooling for the flat wire sheet 1.
[0026] like Figure 2 As shown, both adjusting limit frames 3 have L-shaped cross-sections, and their bottoms are smoothly adjusted to the top of the mounting plate 2. The L-shaped cross-section of the adjusting limit frame 3 forms a horizontal limiting part and a vertical support part: the horizontal limiting part can fit against the side of the flat steel sheet 1 to limit the flat steel sheet 1 laterally and prevent it from moving left and right during the stamping process; the vertical support part is smoothly fitted to the top of the mounting plate 2, reducing the frictional resistance when the adjusting limit frame 3 moves, making the movement of the adjusting limit frame 3 on the mounting plate 2 smoother, and at the same time improving the structural stability of the adjusting limit frame 3 itself, avoiding deformation after long-term use, and ensuring the service life and processing accuracy of the tooling.
[0027] In use, this utility model uses the mounting plate 2 as the basic load-bearing structure. The adjustment mechanism 5 achieves the dual synergistic effect of lateral limit adjustment and guide component 4 to achieve longitudinal stability limit, ensuring the accurate positioning of the flat steel sheet 1 during the stamping process. Specifically, in the adjustment mechanism 5, the operator rotates the adjustment knob 53 to drive the lead screw 51 to rotate. Utilizing the threaded engagement between the lead screw 51 and the fixed block 52, the rotational motion is converted into the linear motion of the adjustment limit frame 3. Simultaneously, the slide 54 slides along the slide rail 55 to guide the movement direction of the adjustment limit frame 3, allowing the two symmetrical adjustment limit frames 3 to precisely adjust their spacing, forming a stamping channel that matches the width of the flat wire sheet 1, thus achieving lateral positioning of the flat wire sheet 1. In the guide assembly 4, the elastic frame 43 is fixed in the mounting groove 41 of the adjustment limit frame 3 through the slot 42. Its elasticity ensures that the guide wheel 44 always fits tightly against the top surface of the flat wire sheet 1, limiting the vertical movement of the flat wire sheet 1. Furthermore, during the conveying of the flat wire sheet 1, the rolling motion of the guide wheel 44 converts friction into a form, ensuring its smooth movement along the stamping channel and avoiding lateral deviation. Ultimately, this achieves precise positioning of the flat wire sheet 1 in all directions during stamping, ensuring the stamping position accuracy of structures such as the weight reduction hole 12 and the bayonet 13.
[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A lightweight wiper wire structure with a weight-reducing hole array, comprising a flat wire steel sheet (1), characterized in that: Two sets of weight-reducing holes (12) penetrating the thickness of the flat wire steel sheet (1) are provided along the length direction of the flat wire steel sheet (1). The two sets of weight-reducing holes (12) are located on both sides of the flat wire steel sheet (1) to achieve weight reduction and lightening of the entire flat wire steel sheet (1). The flat wire steel sheet (1) has symmetrical slots (13) on both sides near the two ends for reliable connection with the wiper frame connector.
2. The lightweight wiper wire structure with a weight-reducing hole array according to claim 1, characterized in that: The flat wire steel sheet (1) is fixedly connected to the upper and lower surfaces of the middle part with reinforcing ribs (11), and both reinforcing ribs (11) are semi-cylindrical. At the same time, the two sets of weight-reducing holes (12) are symmetrically arranged about the reinforcing ribs (11).
3. A lightweight wiper wire structure with a weight-reducing hole array according to claim 2, characterized in that: The two sets of weight-reducing holes (12) are in one of the following shapes: circular, elliptical, rhomboid, or rectangular.
4. A stamping positioning fixture applied to the wiper flat wire structure described in claims 1-3, characterized in that: The mounting plate (2) is provided with an adjustment limit frame (3) symmetrically arranged on the top of the mounting plate (2) near the middle position. Multiple guide components (4) are arranged at equal intervals on the top of the two adjustment limit frames (3). Adjustment mechanisms (5) are provided on the side walls of the two adjustment limit frames (3). The adjustment mechanism (5) adjusts the width of the flat wire steel sheet (1) on the mounting plate (2) to form a stamping channel through which the flat wire steel sheet (1) passes, and the guide assembly (4) is used to stably fix the flat wire steel sheet (1) in the stamping channel to realize the stamping operation.
5. The stamping positioning fixture for the wiper flat wire structure according to claim 4, characterized in that: The guide assembly (4) includes a mounting groove (41) on the top of the adjusting limit frame (3). The inner wall of the mounting groove (41) is symmetrically provided with slots (42) near the top. An elastic frame (43) is engaged and connected inside the slots (42). A guide wheel (44) is rotatably connected to one side of the elastic frame (43) near the bottom. The bottom of the guide wheel (44) is smoothly attached to the top of the flat wire steel sheet (1).
6. The stamping positioning fixture for the wiper flat wire structure according to claim 5, characterized in that: The adjustment mechanism (5) includes a lead screw (51) rotatably connected to the middle position of the adjustment limit frame (3). The outer wall of the lead screw (51) is threaded with a fixing block (52). The lead screw (51) passes through the fixing block (52) fixed on the mounting plate (2) and has an adjustment knob (53) fixedly connected to its end face. The adjustment limit frame (3) is symmetrically fixed with a slide (54) on the same side of the lead screw (51) near the end face. The two slides (54) are slidably connected to the corresponding slide rails (55) fixed on the top of the mounting plate (2).
7. The stamping positioning fixture for the wiper flat wire structure according to claim 6, characterized in that: Both of the aforementioned adjustment limit brackets (3) have an L-shaped cross-section, and their bottoms are smoothly adjusted to the top of the mounting plate (2).