A bending and pushing mechanism for metal sheets of a current protector

Abstract

This invention discloses a bending and pushing mechanism for a current protector metal sheet, belonging to the technical field of current protector metal sheet processing equipment. The mechanism has a conveying path for the metal strip, on which a bending mechanism and a rotatable rotating part are configured. The rotating part is linked to the bending mechanism, rotating synchronously with it and driving the metal strip to complete the feeding movement. The sliding frame of the bending mechanism reciprocates, driving the rotating part to rotate via a one-way ratchet transmission assembly. A lever block is elastically floating and mounted on the rotating part, capable of engaging in the gaps of the metal strip to drag the material. A vibration drive unit is also configured to drive the lever block to vibrate radially at high frequency, performing vibration grinding to remove burrs from the gaps in the metal sheet. This invention relies on the bending mechanism's own movement to achieve feeding linkage, eliminating the need for an independent feeding drive. Simultaneously, it reuses the lever block to remove burrs from the gaps, reducing processing steps, decreasing component wear, and improving processing accuracy and production efficiency.

Description

Technical Field

[0001] This invention relates to the field of electronic component manufacturing technology, specifically to a bending and pushing mechanism for a current protector metal sheet. Background Technology

[0002] The bimetallic strip inside the current protector is made of two different metal sheets that are bent and welded together. During the manufacturing process, the metal sheets are initially a continuous metal strip connected to each other. Each unit on the continuous metal strip needs to be bent one by one. After bending, they are cut to separate individual metal sheets. Then, the individual metal sheets of different materials are welded together to form the finished bimetallic strip.

[0003] In existing processing equipment, bending of metal strips is accomplished by mechanical pressure, and the bending station is equipped with a drag needle-type pushing mechanism to achieve material stepping. After each metal sheet is bent, the drag needle moves down and extends into the gap between adjacent metal sheets, then moves laterally by one step, and the drag needle drags the metal strip against the side wall of the gap to complete the feeding. Afterwards, the drag needle rises up and exits the gap to reset, waiting for the next bending cycle.

[0004] This current pushing method has several practical drawbacks. The repeated insertion and withdrawal of the dragging needle into and out of the metal sheet gap causes continuous collision and friction between the needle tip and the gap's sidewall. Over time, this leads to wear and deformation of the needle tip, increasing the engagement gap and causing pushing misalignment, step deviation, and cumulative positional errors. Furthermore, when the incoming material contains burrs or dimensional tolerances, the dragging needle is prone to jamming, resulting in feeding failure and machine downtime. The bending and feeding processes are executed sequentially; the next bending operation cannot begin until the dragging needle has completed its downward, dragging, and lifting motion, thus consuming processing time and hindering overall machine efficiency. Additionally, the existing bending station can only complete bending and feeding simultaneously; burrs generated during gap cutting cannot be processed concurrently. After bending, the material must be transferred to a separate station for deburring, increasing equipment investment and turnaround time. Therefore, there is an urgent need to develop a new bending pushing mechanism to solve these technical problems. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] To address the technical problem in existing technologies where the movement of a metal strip relies on a metal needle, which easily leads to displacement errors, the present invention provides the following technical solution: A current protector metal strip bending and pushing mechanism includes a conveying path for the metal strip to pass through, a bending mechanism acting on the metal strip is arranged on the conveying path, and a rotating part is rotatably arranged for contacting the metal strip. The rotating part is linked and cooperates with the bending mechanism and rotates synchronously with the bending mechanism. When the rotating part rotates, it synchronously drives the metal strip to move.

[0007] As a preferred technical solution for a metal strip bending and pushing mechanism for a current protector, the bending mechanism includes a sliding frame, an upper die, and a lower die. The lower die is fixedly arranged on the conveying path, and the upper die is fixedly installed on the sliding frame. The sliding frame maintains a reciprocating linear motion to drive the upper die to cooperate with the lower die to complete the bending of the metal strip.

[0008] As a preferred technical solution for a current protector metal sheet bending and pushing mechanism, the rotating part is a push wheel, and a number of actuating blocks are radially slidably mounted on the outer periphery of the push wheel, and the actuating blocks are engaged in the gaps between the metal sheets.

[0009] As a preferred technical solution for a current protector metal sheet bending and pushing mechanism, the actuating block and the pushing wheel are elastically connected.

[0010] As a preferred technical solution for a current protector metal sheet bending and pushing mechanism, a rubber strip is provided between the actuating block and the pushing wheel.

[0011] As a preferred technical solution for the bending and pushing mechanism of the metal sheet of a current protector, a one-way ratchet transmission assembly is also provided. The one-way ratchet transmission assembly is connected between the sliding frame and the push wheel. When the sliding frame is lifted and reset, the push wheel is driven to rotate through the one-way ratchet transmission assembly. When the sliding frame is bent and pressed down, the one-way ratchet transmission assembly idles and the push wheel remains stationary.

[0012] As a preferred technical solution for the bending and pushing mechanism of the metal strip of a current protector, a vibration driving unit is also provided. The vibration driving unit is used to drive the actuating block to generate high-frequency radial reciprocating motion so as to keep the actuating block grinding the gap of the metal strip.

[0013] As a preferred technical solution for a current protector metal sheet bending and pushing mechanism, the vibration driving unit includes an electromagnet and a permanent magnet disposed on the toggle block. The electromagnet outputs an alternating magnetic field, which, in conjunction with the permanent magnet, drives the toggle block to vibrate at high frequency.

[0014] As a preferred technical solution for a current protector metal sheet bending and pushing mechanism, the vibration driving unit includes a gear, with triangular teeth arranged on the outer periphery of the gear and protrusions arranged on the actuating block; when the gear rotates, the triangular teeth repeatedly strike the protrusions.

[0015] As a preferred technical solution for a current protector metal sheet bending and pushing mechanism, the gear is driven by either a drive wheel to rotate in conjunction with the gear or by an independent motor to drive the gear to rotate.

[0016] The current protector metal sheet bending and pushing mechanism provided by the present invention has the following beneficial effects: This invention utilizes the reciprocating motion of a bending sliding frame as the pushing power, and a ratchet unidirectional transmission mechanism drives a push wheel to achieve step-by-step feeding of metal strips, eliminating the need for independent feeding drive components such as cylinders and slides. During the bending pressing phase, the ratchet mechanism idles, preventing material movement; the pushing action is only completed when the sliding frame rises and resets. The timing of bending and feeding actions is naturally matched, eliminating complex timing control programs, reducing the number of parts in the machine, lowering equipment manufacturing costs, and avoiding synchronization errors caused by multiple mechanisms, thus ensuring the positional accuracy of the bending process.

[0017] The actuating block of this invention combines the functions of pushing and engaging with grinding and deburring, eliminating the need for an additional independent deburring mechanism. During bending and waiting intervals, the actuating block is driven to reciprocate at high frequency using an alternating magnetic field or gear impact, directly grinding the burrs at the cut edges between the metal strips. By reusing the original pushing component, the processing steps are integrated, shortening the production line process, eliminating workpiece transfer, and preventing burr defects from affecting the subsequent bimetallic sheet welding and bonding quality.

[0018] The actuating block adopts a radial floating assembly structure, relying on rubber strips for elastic connection and reset. When the actuating block engages with the gap in the metal strip to push material, it has a certain floating compensation capability, adapting to minor dimensional deviations in the gap between the incoming metal strip and reducing the probability of jamming or seizing failures. Simultaneously, the rubber strips absorb the impact loads generated by the vibration, grinding, and dragging of the actuating block, reducing rigid impact wear on parts, extending the service life of the actuating block and the push wheel, and reducing the frequency of equipment maintenance.

[0019] This invention features two switchable high-frequency vibration drive methods for the actuating block: one using an alternating magnetic field driven by an electromagnet, and the other using mechanical impact driven by gears and triangular teeth, adapting to different on-site conditions. The electromagnetic drive structure is simple and suitable for small to medium-sized high-speed equipment; the mechanical gear drive has stronger resistance to harsh working conditions and is unaffected by dust and oil. The two modes can be selected as needed, improving the versatility of the mechanism and facilitating the production adaptation of equipment for metal strips of different specifications. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a perspective view of the first embodiment of the present invention.

[0021] Figure 2 For about Figure 1 Another perspective view.

[0022] Figure 3 For about Figure 2 A magnified view of the central portion.

[0023] Figure 4 For about Figure 1 The illustrated embodiment is a schematic diagram of the application state.

[0024] Figure 5 This is a schematic diagram showing the separation between the push wheel and the actuating block in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the toggle block being engaged between the metal plates in an embodiment of the present invention.

[0026] Figure 7 This is a diagram illustrating a portion of the structure in the second embodiment of the present invention.

[0027] Figure label: 1. Machine base; 2. Sliding frame; 3. Upper die; 4. Lower die; 5. Push wheel; 6. Actuating block; 7. Rubber strip; 8. Transmission wheel; 9. Drive wheel; 10. Push rod; 11. Electromagnet; 12. Gear; 13. Triangular tooth; 14. Protrusion. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0032] Example 1:

[0033] Reference Figures 1 to 6 This application provides a metal sheet bending and pushing mechanism for a current protector, used to bend continuously connected metal strips piece by piece, and to achieve automatic step feeding after bending. Gaps are reserved between the metal strips, allowing for subsequent processing by cutting and separating individual metal sheets along these gaps. The mechanism includes a machine base 1 for carrying and moving the metal strips. A sliding frame 2 is vertically slidably mounted on the machine base 1, and the sliding frame 2 is connected to an external force-applying drive source, which can be a linear drive component such as a cylinder or hydraulic cylinder. An upper pressing die 3 is fixedly mounted on the sliding frame 2, and a lower pressing die 4 is fixedly mounted on the machine base 1. The metal strips are conveyed along the guide rail surface of the machine base 1, passing over the upper part of the lower pressing die 4 during movement. Figure 4 As shown. The drive source drives the sliding frame 2 to move downward in a straight line, and the upper die 3 follows downward, working with the lower die 4 to extrude the single metal sheet on the metal strip, thereby achieving the bending and forming of the metal sheet.

[0034] The machine base 1 is also equipped with a rotating drive wheel 5, and multiple sets of actuating blocks 6 are slidably mounted on the wheel body along its own radius; such as Figure 5 As shown in the exploded view, a rubber strip 7 connects the actuating block 6 and the push wheel 5. The rubber strip 7 serves as an elastic connection and reset mechanism, enabling the actuating block 6 to have radial extension and floating capabilities. The outer contour of the actuating block 6 is adapted to the gap between adjacent metal pieces on the metal strip, allowing the actuating block 6 to be inserted into the gap of the metal strip, thus enabling the actuating block to be pulled and moved.

[0035] A pawl-ratchet transmission mechanism is provided between the push wheel 5 and the sliding frame 2 to achieve motion coupling; after each bending and pressing down, the sliding frame 2 returns to its original position, which can drive the push wheel 5 to rotate at a fixed angle through the transmission mechanism. Figure 3 In the enlarged view, a transmission wheel 8 is rotatably mounted on the machine base 1. The transmission wheel 8 and the push wheel 5 are engaged by meshing teeth on their wheel edges to achieve transmission. A drive wheel 9 is also rotatably mounted on the machine base. Pawls are mounted on the drive wheel 9 and the machine frame, respectively, and ratchet teeth are provided on the outer circumference of the transmission wheel 8. The pawls and ratchet teeth cooperate to form a one-way ratchet mechanism. A push rod 10 is fixedly connected to the drive wheel 9, and the end of the push rod 10 is hinged to the sliding frame 2.

[0036] The working process of this unidirectional transmission is as follows: When the sliding frame 2 completes the bending process and retracts upward, the sliding frame 2 pulls the push rod 10 to swing upward. The push rod 10 drives the drive wheel 9 to rotate, and through the pawl and ratchet, drives the transmission wheel 8 to rotate through a fixed angle. The transmission wheel 8 further drives the push wheel 5 to rotate by a preset angle. During the rotation of the push wheel 5, the actuating block 6, which is engaged in the gap of the metal strip, drives the entire metal strip to move forward by one metal sheet step distance, completing one material push. When the sliding frame 2 performs the bending and pressing action downward, the push rod 10 swings downward. At this time, the ratchet mechanism spins freely, and the rotation of the drive wheel 9 cannot be transmitted to the transmission wheel 8. The push wheel 5 remains stationary and no feeding action occurs. Thus, the pressing and bending and the lifting and resetting are completed simultaneously, and one step distance feeding is completed for each bending.

[0037] Furthermore, this mechanism integrates a burr removal function for gaps. An electromagnet 11 is fixedly arranged on the machine base 1 inside the push wheel 5; a permanent magnet is integrated inside the actuating block 6. When the push wheel 5 stops rotating and the upper die 3 and lower die 4 are in the intermittent stage of bending operations, the electromagnet 11 outputs an alternating magnetic field. The alternating magnetic field interacts with the permanent magnet inside the actuating block 6, driving the actuating block 6, located at the lowest position of the wheel, to generate high-frequency radial reciprocating vibration. In the vibrating state, the actuating block 6 performs high-frequency reciprocating grinding motion inside the gap of the metal strip, grinding and removing burrs and flash at the gap cut position, eliminating the need for a separate deburring station.

[0038] like Figure 7 As shown, this is the second embodiment of the present invention, providing another mechanical drive scheme for realizing high-frequency reciprocating motion of the actuating block. A gear 12 is rotatably mounted on the machine base 1, and the outer periphery of the gear 12 is provided with densely arranged triangular teeth 13; a protrusion 14 is provided on the inner side of the actuating block 6; the gear 12 can establish a transmission relationship with the push wheel 5. While the push wheel 5 rotates, it drives the gear 12 to rotate at high speed. The triangular teeth 13 of the gear 12 continuously and repeatedly strike the protrusion 14, driving the actuating block 6 to perform high-frequency reciprocating motion in the radial direction, thereby realizing the grinding of burrs in the gaps; alternatively, an independent motor can be configured to directly drive the gear 12 to rotate, without relying on the rotational power of the push wheel, to realize high-frequency vibration grinding of the actuating block.

[0039] The complete workflow of our organization: 1. The drive source drives the sliding frame 2 to move downward, the upper die 3 presses down, and works with the lower die 4 to complete the bending and forming of a single metal sheet on the metal strip; during this process, the push rod 10 swings down, the ratchet mechanism rotates idly, the push wheel 5 remains stationary, and the position of the metal strip remains unchanged.

[0040] 2. After bending is completed, the drive source drives the sliding frame 2 to lift and reset; the sliding frame 2 pulls the push rod 10 to swing upward, and drives the transmission wheel 8 and the push wheel 5 to rotate through the set angle via the drive wheel 9, ratchet-ratchet pair; the toggle block 6 is engaged in the gap of the metal strip, and drags the metal strip forward to give a workpiece step distance.

[0041] 3. The drive wheel 5 stops rotating, and the mechanism enters the bending waiting position; the electromagnet 11 outputs an alternating magnetic field (or the gear 12 drives it), causing the toggle block 6 in the working position to vibrate at high frequency, grinding and deburring the metal strip gap.

[0042] 4. Repeat the above steps to achieve continuous processing of bending, pushing, and deburring.

[0043] The rubber strip 7 provides radial reset elasticity for the actuating block 6 and also acts as a buffer and vibration damper when the actuating block is engaged in the gap and vibrating during grinding, reducing rigid impact. The ratchet mechanism ensures that feeding action only occurs during the upward reset phase of the sliding frame, preventing material movement during the bending and pressing phase, thus ensuring the dimensional accuracy of the bending process. This invention integrates bending action, step-by-step pushing, and gap deburring functions into a single device. The linear reciprocating motion of bending serves as the power source for pushing, eliminating the need for an additional independent feeding drive component. Simultaneously, the actuating block component is reused for deburring, reducing the number of parts in the machine and shortening the processing steps.

[0044] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A current protector metal strip bending and pushing mechanism, comprising a conveying path for the metal strip to pass through, wherein a bending mechanism acting on the metal strip is disposed on the conveying path, and a rotating part rotatably disposed for contacting the metal strip is provided, wherein the rotating part is linked and cooperates with the bending mechanism and rotates synchronously with the bending mechanism, and the rotating part drives the metal strip to move synchronously when it rotates.

2. The current protector metal sheet bending and pushing mechanism according to claim 1, characterized in that, The bending mechanism includes a sliding frame, an upper die, and a lower die. The lower die is fixedly arranged on the conveying path, and the upper die is fixedly installed on the sliding frame. The sliding frame maintains a reciprocating linear motion to drive the upper die to cooperate with the lower die to complete the bending of the metal strip.

3. The current protector metal sheet bending and pushing mechanism according to claim 2, characterized in that, The rotating part is a drive wheel, and a number of actuating blocks are radially slidably mounted on the outer circumference of the drive wheel. The actuating blocks are engaged in the gaps between the metal sheets.

4. The current protector metal sheet bending and pushing mechanism according to claim 3, characterized in that, The actuating block and the drive wheel are elastically connected.

5. The current protector metal sheet bending and pushing mechanism according to claim 4, characterized in that, A rubber strip is provided between the actuating block and the drive wheel.

6. The current protector metal sheet bending and pushing mechanism according to any one of claims 2-5, characterized in that, A one-way ratchet drive assembly is also provided, which is connected between the sliding frame and the push wheel. When the sliding frame is lifted and reset, the push wheel is driven to rotate through the one-way ratchet drive assembly. When the sliding frame is bent and pressed down, the one-way ratchet drive assembly rotates freely, and the push wheel remains stationary.

7. The current protector metal sheet bending and pushing mechanism according to claim 6, characterized in that, It is also equipped with a vibration drive unit, which is used to drive the actuating block to generate high-frequency radial reciprocating motion so as to keep the actuating block grinding the gap of the metal strip.

8. The current protector metal sheet bending and pushing mechanism according to claim 7, characterized in that, The vibration driving unit includes an electromagnet and a permanent magnet disposed on the toggle block. The electromagnet outputs an alternating magnetic field, which, in conjunction with the permanent magnet, drives the toggle block to vibrate at high frequency.

9. The current protector metal sheet bending and pushing mechanism according to claim 7, characterized in that, The vibration drive unit includes a gear with triangular teeth on its outer circumference and a protrusion on the actuating block; when the gear rotates, the triangular teeth repeatedly strike the protrusion.

10. The current protector metal sheet bending and pushing mechanism according to claim 9, characterized in that, The gear is driven by either a drive wheel that rotates in conjunction with the gear or by an independent motor that drives the gear to rotate.

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