A winding jig for realizing tail line vertical positive pressure
By designing winding fixtures for the upper and lower mold components, and utilizing inclined plane transmission to decompose the vertical downward pressure into vertical positioning and horizontal clamping actions, the problem of difficulty in vertically pressing the tail wire end was solved, achieving a stable clamping effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TANAC AUTOMATION
- Filing Date
- 2026-05-09
- Publication Date
- 2026-07-31
AI Technical Summary
Existing winding fixtures have difficulty achieving vertical positive pressure when clamping the tail wire end, resulting in pressure dispersion and easy loosening of the tail wire. This is especially true when switching between different models and sizes of coil frames.
A winding fixture comprising an upper mold assembly and a lower mold assembly is adopted. The mechanical structure restricts the sequence of actions, decomposing the vertical downward pressure into two orderly actions: vertical positioning and horizontal clamping. The vertical motion is converted into horizontal thrust by using inclined plane transmission to ensure vertical positive pressure at the tail wire end.
It achieves vertical positive pressure at the tail wire end, ensuring that the contact surface of the pressure block is completely in close contact with the wire, avoiding false pressure and oblique pressure, and adapting to the clamping force requirements of coil frames of different specifications.
Smart Images
Figure CN122494440A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of winding machine technology, and in particular to a winding fixture for achieving vertical positive pressure on the tail wire. Background Technology
[0002] A coil typically refers to a loop of wire winding. Common applications include motors, inductors, transformers, and loop antennas. For some specialized products, there are specific requirements regarding the position, orientation, and exit angle of the starting and ending wires. The starting and ending wires must be horizontal, meaning they are perpendicular to the extension direction of the coil frame, and they must be on the same plane. The resulting coil should resemble... Figure 6 The coil 100 includes a coil frame 110 and a wire 120 spirally wound on the coil frame 110. One end of the wire 120 is the starting end 130, and the other end is the ending end 140. Because the wire is mostly spirally wound to meet wiring requirements, the starting end 130 and the ending end 140 will inevitably be tilted during winding, making it difficult to ensure that the outgoing and incoming wires at the starting and ending ends are perpendicular to the extension direction of the coil frame.
[0003] Currently, existing winding mechanisms typically use a fixture containing upper and lower dies to clamp the coil bobbin, and winding is completed by rotating the main shaft in conjunction with moving the guide pin. For fixing the starting end of the wire, existing technologies have relatively mature solutions, such as using wire clamps or simple pressure blocks to press the horizontally conveyed wire end at a suitable position near the bobbin before winding begins.
[0004] However, for fixing the tail wire end after winding, since the tail wire end is located on one side of the wound coil, the upper pressure block is generally hidden in the upper fixture to avoid interference during the winding process. It only extends out of the upper fixture when clamping is required. If a simple pressure block is used to press down vertically from above, its movement path will interfere with the protruding coil wire, making it impossible to directly press the tail wire end. Therefore, the prior art generally adopts a method of pressing down the pressure block at an oblique angle. This method usually includes a rotatable pressure block, one end of which is mounted on the drive component via a pivot or hinge point, and the other end is the execution end for pressing the wire. During operation, the drive component pushes the drive arm of the pressure block, causing the pressure block to rotate around its rotation point. The execution end of the pressure block moves in an arc trajectory and finally falls onto the tail wire end of the coil frame, pressing it onto a specific part of the frame, as disclosed in application number CN202511020490.6, which is suitable for winding the horizontal entry and exit of the tail wire. However, this rotational pressing method has inherent and insurmountable drawbacks. Because the movement trajectory of the pressing block's actuating end is an arc, when it finally presses onto the coil frame, the contact surface and the frame surface will form a certain angle, rather than an ideal perpendicular positive pressure. This is especially problematic when switching between different models and sizes of coil frames. Since the pressing block's movement trajectory is fixed, when the actual contact position of the frame changes, the pressing block's actuating end may press onto the wire before it has rotated to the positive pressure position. Figure 7 As shown, this causes the contact surface of the pressure block to form an angle with the surface of the wire, which can easily lead to pressure dispersion and create false pressure. That is, it seems to be pressed down, but in fact only part of the wire is pressed down. The contact area is small, and the tail wire may still come loose in subsequent processes or use. Summary of the Invention
[0005] In view of this, the present invention provides a winding fixture for achieving vertical positive pressure on the tail wire, so as to solve the above-mentioned technical problems.
[0006] A winding fixture for achieving vertical positive pressure on the tail wire includes a lower die assembly and an upper die assembly. The upper die assembly includes an upper die base, a movable rod inserted into the upper die base, a first crossbar inserted into the movable rod, a fixed ring seat disposed on the first crossbar, a transmission block disposed on the fixed ring seat, a limiting rod disposed on the movable rod, a second pressure block slidably disposed on the movable rod, and a second crossbar inserted into the second pressure block. The upper die base is provided with a through-hole for accommodating the movement of the movable rod, a first sliding groove for accommodating the movement of the first crossbar, and a second sliding groove for accommodating the movement of the limiting rod. A third sliding groove and a limiting sliding structure are provided at one end of the movable rod near the lower die assembly. The extending direction of the third sliding groove is perpendicular to the moving direction of the movable rod. The limiting sliding structure is used to set the second pressure block and allow it to slide along the limiting sliding structure. The sliding direction of the limiting sliding structure is parallel to the extension direction of the third sliding groove. A fourth sliding groove is provided at the middle section of the movable rod for passing through the first crossbar. The first crossbar passes through the fourth sliding groove and its two ends are movably inserted into the first sliding groove. One end of the transmission block is connected to the fixed ring seat, and the other end is provided with a third inclined surface. The limiting rod passes through the movable rod and its two ends are movably disposed in the second sliding groove. A fifth elastic element is provided between the limiting rod and the first crossbar. In a free state, the fifth elastic element pushes the first crossbar to move away from the limiting rod, so that the first crossbar is located at the end of the fourth sliding groove away from the limiting rod in a free state. The second pressure block is slidably disposed on the limiting sliding structure. One end of the second pressure block is provided with a fourth inclined surface, which abuts against the third inclined surface. The second crossbar is inserted into the second pressure block and its two ends are slidably disposed in the third sliding groove. A sixth elastic element is provided between the second pressure block and the movable rod. Furthermore, the upper mold assembly also includes an upper fixing seat disposed on the upper mold base, the upper fixing seat having a second fixing port at one end facing the lower mold assembly, and the other end of the coil frame being inserted into the second fixing port.
[0007] Furthermore, the central axis of the movable hole is coaxial with the central axis of the upper mold base. The central axis of the first sliding groove is perpendicular to the central axis of the movable hole and extends parallel to the central axis of the movable hole. The central axis of the second sliding groove is perpendicular to the central axis of the movable hole and extends parallel to the central axis of the movable hole. The first sliding groove and the movable hole are interconnected.
[0008] Furthermore, a limiting block is provided at the end of the movable rod away from the lower mold assembly, and a fourth elastic element is sleeved on the movable rod. One end of the fourth elastic element abuts against the limiting block, and the other end abuts against the upper fixed seat. The movable rod is pushed in a free state by the elastic force of the fourth elastic element itself to move away from the lower mold assembly.
[0009] Furthermore, the limiting sliding structure is U-shaped and has limiting blocks facing each other at the opening.
[0010] Furthermore, the lower mold assembly includes a lower mold base, a mounting base disposed on the lower mold base, a slider slidably disposed on the mounting base, a first elastic member disposed between the slider and the mounting base, a first pressure block slidably disposed on the slider, a second elastic member disposed between the first pressure block and the slider, and a drive rod slidably disposed on the mounting base.
[0011] Furthermore, the slider has the first pressure block at one end and the first inclined surface at the other end. The first elastic element abuts against the mounting base at one end and against the slider at the other end. The slider slides in a direction that is close to or away from the lower mold base.
[0012] Furthermore, the sliding direction of the drive rod is perpendicular to the sliding direction of the slider. One end of the drive rod is provided with a second inclined surface, and the other end is provided with a sliding wheel. The second inclined surface and the first inclined surface abut against each other. A third elastic element is also provided between the drive rod and the mounting base. One end of the third elastic element is fixedly connected to the mounting base, and the other end is fixedly connected to the drive rod.
[0013] Furthermore, the winding fixture for achieving vertical positive pressure on the tail wire also includes a wire clamp assembly disposed on the lower die assembly.
[0014] Compared with existing technologies, the winding fixture for achieving vertical positive pressure on the tail wire provided by this invention restricts the sequence of actions through a mechanical structure. First, the first crossbar presses down, pushing the movable rod downwards as a whole through the fourth sliding groove. At this time, there is no relative sliding between the first crossbar and the movable rod. When the limiting rod reaches the bottom of the second sliding groove, the vertical movement of the movable rod is forcibly stopped. Then, as the first crossbar continues to press down, it slides relative to the first crossbar within the fourth sliding groove, thereby driving the transmission block downwards. The cooperation between the third inclined surface of the transmission block and the fourth inclined surface of the second pressure block converts the vertical movement of the transmission block into a horizontal thrust on the second pressure block through the sliding contact of these two inclined surfaces. The single vertical downward force is decomposed into two ordered actions: controlling the second pressure block to first be vertically positioned and then horizontally pressed, ensuring that the second pressure block is vertically positively pressed on the tail wire end, ensuring that the contact surface of the pressure block is completely in close contact with the wire, fundamentally eliminating the false pressure and oblique pressure caused by the arc motion. For coil frames of different specifications, the sixth elastic element absorbs the tolerance of the frame size during the horizontal clamping stage, ensuring that the second pressure block can provide sufficient and unloaded clamping force under various sizes. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of a winding fixture for achieving vertical positive pressure on the tail wire, provided by the present invention.
[0016] Figure 2 for Figure 1 The diagram shows the exploded structure of the lower die assembly of the winding fixture that achieves vertical positive pressure on the tail wire.
[0017] Figure 3 for Figure 1 The above is an exploded structural diagram of the upper mold assembly of the winding fixture that achieves vertical positive pressure on the tail wire.
[0018] Figure 4 for Figure 1 A partially exploded structural diagram of the upper mold assembly of the winding fixture that achieves vertical positive pressure on the tail wire.
[0019] Figure 5 for Figure 1 A cross-sectional view of the upper die assembly of the winding fixture that achieves vertical positive pressure on the tail wire.
[0020] Figure 6 for Figure 1 The diagram shows the structure of the coil to be wound by the winding fixture that achieves vertical positive pressure on the tail wire.
[0021] Figure 7 This is a schematic diagram of the structure in the prior art where the same pressure block abuts against coil frames of different specifications. Detailed Implementation
[0022] The following provides a more detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.
[0023] like Figures 1 to 6 The diagram shows a schematic representation of the winding fixture for achieving vertical positive pressure on the tail wire provided by the present invention. The winding fixture includes a lower die assembly 10, an upper die assembly 20, and a wire clamp assembly 30 disposed on the lower die assembly 10. It is conceivable that the winding fixture for achieving vertical positive pressure on the tail wire also includes other functional modules, such as connecting components, sensors, and mounting components, etc., which are technologies well known to those skilled in the art and will not be described in detail here.
[0024] First, it should be noted that the winding fixture for achieving vertical positive pressure on the tail wire is used to wind the coil 100. The coil 100 includes a coil frame 110 and a wire 120 spirally wound on the coil frame 110. One end of the wire 120 is the starting end 130, and the other end of the wire 120 is the tail wire end 140. The coil 100 should be considered prior art and will not be described in detail here.
[0025] The lower mold assembly 10 includes a lower mold base 11, a mounting base 12 disposed on the lower mold base 11, a slider 13 slidably disposed on the mounting base 12, a first elastic member 14 disposed between the slider 13 and the mounting base 12, a first pressure block 15 slidably disposed on the slider 13, a second elastic member 16 disposed between the first pressure block 15 and the slider 13, and a drive rod 17 slidably disposed on the mounting base 12.
[0026] The lower mold base 11 is connected to an external driving device and rotates under the action of the driving device to perform a winding rotation action. The lower mold base 11 has a first fixing port 18 at one end facing the upper mold assembly 20. One end of the coil frame 110 is inserted into the first fixing port 18. After being fixed, the coil frame 110 is rotated, thereby winding the wire 120 onto the coil frame 110.
[0027] The mounting base 12 is fixed on the lower mold base 11 and rotates together with the lower mold base 11. The mounting base 12 is used to support and set the slider 13 and the drive rod 17. Therefore, the mounting base 12 is provided with multiple sliding grooves to complete the sliding limit of the slider 13 and the drive rod 17.
[0028] The slider 13 has the first pressure block 15 at one end and the first inclined surface 131 at the other end. The first elastic member 14 abuts against the mounting base 12 at one end and against the slider 13 at the other end. The slider 13 slides towards or away from the lower mold base 11. Specifically, in its free state, the first elastic member 14's own elastic force drives the slider 13 to move away from the lower mold base 11, preventing the first pressure block 15 on the slider 13 from pressing against the wire. The first inclined surface 131 is pushed by the drive rod 17, causing the slider 13 to move towards the lower mold base 11 and compressing the first elastic member 14, thus pressing against the wire by the first pressure block 15 on the slider 13.
[0029] The first pressure block 15 is used to press down the starting end 130. Since the wire is transported horizontally when it is inserted and not wound, it is still in a horizontal state. Only when the wire is wound will the guide pin (not shown) through which the wire is inserted be adjusted in height as the winding is carried out to achieve spiral winding, which causes the wire to tilt. Therefore, by pressing down the starting end 130, which is in a horizontal state, before winding, the first pressure block 15 can ensure that the starting end 130 is set horizontally.
[0030] The sliding connection between the first pressure block 15 and the slider 13 can be achieved by inserting a connecting rod into the slider 13 and setting a limiting groove on the first pressure block 15, so that both ends of the connecting rod are slidably disposed in the limiting groove. This sliding method is existing technology and will not be elaborated further. In its free state, the second elastic element 16 uses its own elastic force to move the first pressure block 15 towards the lower mold base 11. When the first pressure block 15 has already pressed against the starting end 130 and the slider 13 is still applying pressure, the second elastic element 16 provides a certain degree of buffering, reducing the pressure on the starting end 130, thereby preventing damage or deformation of the starting end 130, and improving stability during rotation.
[0031] The sliding direction of the drive rod 17 is perpendicular to the sliding direction of the slider 13. One end of the drive rod 17 is provided with a second inclined surface 171, and the other end is provided with a sliding wheel 172. The second inclined surface 171 and the first inclined surface 131 abut against each other, so that when the external device pushes the drive rod 17 to move axially, it can push the slider 13 to move, so that the first pressure block 15 abuts against and presses against the starting end 130. Since it is necessary to keep the starting end 130 pressed during the winding process, the external device needs to keep the drive rod 17 in a circular motion state constantly raised, and the sliding wheel 172 is used to reduce the friction between the drive rod 17 and the external drive device during the circular motion. A third elastic element 173 is also provided between the drive rod 17 and the mounting base 12. One end of the third elastic element 173 is fixedly connected to the mounting base 12, and the other end is fixedly connected to the drive rod 17. When the external drive device raises the drive rod 17, the third elastic element 173 compresses and stores elastic potential energy. When the external drive device resets and stops raising the drive rod 17, the drive rod 17 moves down and resets through the elastic force of the third elastic element 173 itself.
[0032] The upper mold assembly 20 includes an upper mold base 21, an upper fixed base 22 disposed on the upper mold base 21, a movable rod 23 inserted on the upper mold base 21, a first crossbar 24 inserted on the movable rod 23, a fixed ring seat 25 disposed on the first crossbar 24, a transmission block 26 disposed on the fixed ring seat 25, a limiting rod 27 disposed on the movable rod 23, a second pressure block 28 slidably disposed on the movable rod 23, and a second crossbar 29 inserted on the second pressure block 28.
[0033] The upper mold base 21 is cylindrical and connected to an external driving device, and rotates through the external driving device.
[0034] The upper mold base 21 is provided with an active hole 211 for accommodating the movement of the movable rod 23 and passing through it, a first sliding groove 212 for accommodating the movement of the first crossbar 24, and a second sliding groove 213 for accommodating the movement of the limiting rod 27.
[0035] The central axis of the movable hole 211 is coaxial with the central axis of the upper mold base 21. The central axis of the first sliding groove 212 is perpendicular to the central axis of the movable hole 211 and extends parallel to the central axis of the movable hole 211. The central axis of the second sliding groove 213 is perpendicular to the central axis of the movable hole 211 and extends parallel to the central axis of the movable hole 211. The first sliding groove 212 and the second sliding groove 213 are interconnected. The first sliding groove 212 and the second sliding groove 213 are located on different sides of the upper fixed base 22.
[0036] The upper fixing seat 22 is provided with a second fixing port 221 at one end facing the lower mold assembly 10, and the other end of the coil frame 110 is inserted into the second fixing port 221, thereby fixing the two ends of the coil frame 110.
[0037] A limiting block 231 is provided at the end of the movable rod 23 away from the lower mold assembly 10, and a third sliding groove 232 and a limiting sliding structure 233 are provided at the end of the movable rod 23 near the lower mold assembly 10.
[0038] A fourth elastic element 234 is sleeved on the movable rod 23. One end of the fourth elastic element 234 abuts against the limiting block 231, and the other end abuts against the upper fixed seat 22. Thus, the movable rod 23 is moved upward away from the lower mold assembly 10 by the elastic force of the fourth elastic element 234 itself.
[0039] The extension direction of the third sliding groove 232 is perpendicular to the movement direction of the movable rod 23, that is, the extension direction of the third sliding groove 232 is horizontal. The limiting sliding structure 233 has a U-shaped structure and a limiting block is provided at the opening. The limiting sliding structure 233 is used to set the second pressure block 28 and enable it to slide along the limiting sliding structure 233. The sliding direction of the limiting sliding structure 233 is parallel to the extension direction of the third sliding groove 232.
[0040] The movable rod 23 has a fourth sliding groove 235 at its middle section for passing through the first crossbar 24. The first crossbar 24 passes through the fourth sliding groove 235 and its two ends are movably inserted through the first sliding groove 212, allowing the first crossbar 24 to pass through the movable rod 23 and the upper fixed seat 22. Therefore, when the external driving device presses down on the first crossbar 24, it can drive the first crossbar 24 to slide along the first sliding groove 212, thereby driving the movable rod 23 to press down and compressing the fourth elastic element 234. After the external driving device resets, the elastic force of the fourth elastic element 234 causes the movable rod 23 to automatically reset. Rolling elements are sleeved at both ends of the first crossbar 24. Since the winding needs to rotate while being pressed down, the rolling elements reduce friction with the external driving device during rotation. The fourth sliding groove 235 is used to achieve multi-stage movement, which will be explained in detail below along with the process.
[0041] The fixed ring seat 25 is disposed on the first crossbar 24 and spaced apart from the upper fixed seat 22, thereby allowing the fixed ring seat 25 to move with the first crossbar 24. One end of the transmission block 26 is connected to the fixed ring seat 25, and the other end is provided with a third inclined surface 261, thereby allowing the transmission block 26 to move vertically together with the fixed ring seat 25.
[0042] The limiting rod 27 passes through the movable rod 23 and is movably disposed at both ends in the second sliding groove 213. Therefore, the limiting rod 27 moves synchronously with the movable rod 23. When the first crossbar 24 pushes the movable rod 23 down, the limiting rod 27 moves synchronously. When the limiting rod 27 moves to the end of the second sliding groove 213, its movement is restricted and it stops, thereby stopping the movable rod 23. A fifth elastic element 236 is provided between the limiting rod 27 and the first crossbar 24. In its free state, the fifth elastic element 236 pushes the first crossbar 24 to move away from the limiting rod 27, so that the first crossbar 24 is located at the end of the fourth sliding groove 234 away from the limiting rod 27 in its free state. Only when the movable rod 23 moves down to a certain position, and the limiting rod 27 reaches the bottom of the second sliding groove 213 and is blocked, does the vertical downward movement of the movable rod 23 stop. At this time, the external drive device continues to press down the first crossbar 24. Since the movable rod 23 can no longer go down, the first crossbar 24 begins to slide relative to the fourth sliding groove 235 of the movable rod 23 and compress the fifth elastic member 26, thereby continuing to move down, and thus only driving the fixed ring seat 25 and the transmission block 26 to continue to move down.
[0043] The second pressure block 28 is slidably disposed on the limiting sliding structure 233 and its sliding direction is restricted, so that the second pressure block 28 can only slide in the horizontal direction. One end of the second pressure block 28 is provided with a fourth inclined surface 281, and the other end is used to press down the tail wire end 140. The fourth inclined surface 281 abuts against the third inclined surface 261. The second crossbar 29 is inserted on the second pressure block 28 and its two ends are slidably disposed in the third sliding groove 232. A sixth elastic element 237 is provided between the second pressure block 28 and the movable rod 23. In the free state, the sixth elastic element 237 pushes the second pressure block 28 to slide away from the movable rod 23 by its own elastic force, while the third sliding groove 232 is used to limit the extreme positions of the horizontal movement of the second crossbar 29 and the second pressure block 28. As the fixed ring seat 25 and the transmission block 26 continue to move downward, the sliding restriction of the two inclined surfaces and the limiting sliding structure 233 pushes the second pressure block 28 toward the moving rod 23 and compresses the sixth elastic element 326, so that the second pressure block 28 moves horizontally to press the tail wire end 140.
[0044] The wire clamp assembly 30 is disposed on the lower mold base 11 and rotates together with the lower mold base 11. The wire clamp assembly 30 is used to clamp one end of the wire to clamp the coil. The wire clamp assembly 30 should be existing technology and will not be described in detail here.
[0045] Before winding, the upper and lower ends of the coil frame 110 are respectively placed in the first fixing port 18 and the second fixing port 221 and fixed by mold closing. During winding, the wire is output from the wire storage cylinder and passes through the guide pin and is clamped by the wire clamp assembly 30. The guide pin is a component in the winding machine used to guide the wire to travel along a predetermined path during the winding process and its position is moved by a three-axis moving device. It should be existing technology and will not be described in detail here. At this time, since winding has not yet been performed, the position of the guide pin is directly moved so that the guide pin and the wire clamp assembly 30 are at the same height, so that the starting end 130 is set horizontally. Then the external driving device pushes the driving rod 17, the driving rod 17 drives the slider 13 to move towards the lower mold base 11 and the first elastic member 14 is compressed, so that the first pressure block 15 set on the slider 13 presses down on the starting end 130 and holds it. Then, the upper mold assembly 20 and the lower mold assembly 10 rotate synchronously under the drive of the drive assembly 40 to wind the wire. During the winding process, the guide pin moves along the coil skeleton 110, so that the wire is neatly arranged on the coil skeleton 110. Since the horizontally set starting end 130 has been pressed down before rotation, the starting end 130 will remain horizontal even if the guide pin moves along the coil skeleton during winding.
[0046] After winding is completed, the external drive device pushes the first crossbar 24 to slide downward along the first sliding groove 212. Since the first crossbar 24 passes through the fourth sliding groove 235 of the movable rod 23, it will drive the movable rod 23 to move downward against the elastic force of the fourth elastic member 234. At this time, the fourth elastic member 234 remains extended and not compressed. At the same time, the limiting rod 27 fixed on the movable rod 23 slides down synchronously in the second sliding groove 213. The second pressure block 28 and the second crossbar 29 also move downward along with the movable rod 23. During this process, the second pressure block 28 is brought to the side closer to the tail end 140. The second pressure block 28 itself only moves downward and does not move horizontally.
[0047] When the movable rod 23 moves down to a certain position, the limiting rod 27 reaches the bottom of the second sliding groove 213 and is blocked, causing the vertical downward movement of the movable rod 23 to stop. However, since there is still sliding space in the fourth sliding groove 235, when the external driving device continues to press down on the first crossbar 24, since the movable rod 23 can no longer move down, the first crossbar 24 begins to slide relative to the fourth sliding groove 235 of the movable rod 23 and continues to move downward, compressing the fourth elastic element 234. This causes the first crossbar 24 to drive the fixed ring seat 25 and the transmission block 26 on it to continue to move downward. As the transmission block 26 moves downward, the limiting sliding structure 233 restricts the second pressure block 28 to slide only horizontally. Therefore, the vertical downward pressure of the transmission block 26 is converted into a horizontal thrust on the second pressure block 28 through the cooperation of the two inclined surfaces. This causes the second pressure block 28 to overcome the elastic force of the sixth elastic element 237 and slide horizontally towards the tail wire end 140, ultimately pressing its end onto the tail wire end 140 to complete the clamping action. By moving the position of the guide pin, the guide pin is aligned with the height of the last turn of the coil 100, at which point the tail wire end 140 is horizontally positioned. Finally, the upper mold assembly 20 and the lower mold assembly 10 reverse to bend the tail wire end 140, so that the starting end 130 and the tail wire end 140 are on the same plane, completing the winding. For fixing the wire, the coil frame 110 is preheated before winding to melt the adhesive on its surface, and the wire will adhere to the coil frame 110 after winding. At the same time, after the winding is completed, a hot air gun will be used to heat the surface of the wire to melt the paint, and after cooling, they will solidify together.
[0048] The entire tail wire clamping process decomposes the single vertical downward pressure of the external drive device into two orderly actions: first, the second clamping block is vertically positioned, and then horizontally clamped. This ensures that the second clamping block 28 is vertically pressed onto the tail wire end 140, so that the contact surface of the clamping block is completely in close contact with the wire.
[0049] Compared with the prior art, the winding fixture for achieving vertical positive pressure on the tail wire provided by the present invention restricts the action sequence through a mechanical structure. First, the first crossbar 24 is pressed down, pushing the movable rod 23 downward as a whole through the fourth sliding groove 235. At this time, there is no relative sliding between the first crossbar 24 and the movable rod 23. When the limiting rod 27 reaches the bottom of the second sliding groove 213, the vertical movement of the movable rod 23 is forcibly stopped. Then, as the first crossbar 24 continues to be pressed down, it slides relative to the first crossbar 24 in the fourth sliding groove 235, thereby driving the transmission block 26 downward. The cooperation between the third inclined surface 261 of the transmission block 26 and the fourth inclined surface 281 of the second pressure block 28 converts the vertical movement of the transmission block 26 into a horizontal thrust on the second pressure block 28 through the sliding contact of these two inclined surfaces. The single vertical downward pressure is decomposed into two ordered actions: first, the second pressure block is vertically positioned, and then it is horizontally pressed. This ensures that the second pressure block 28 is vertically pressed against the tail wire end 140, guaranteeing that the contact surface of the pressure block is completely in close contact with the wire, fundamentally eliminating false pressure and oblique pressure caused by the arc motion. For coil frames 110 of different specifications, the sixth elastic element 237 absorbs the tolerance of the frame size during the horizontal pressing stage, ensuring that the second pressure block 28 can provide sufficient and non-overloaded pressing force under various sizes.
[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions or improvements within the spirit of the present invention are covered within the scope of the claims of the present invention.
Claims
1. A winding fixture for achieving vertical positive pressure on the tail wire, the winding fixture for achieving vertical positive pressure on the tail wire is used for winding a coil, the coil comprising a coil frame and a conductor spirally wound on the coil frame, one end of the conductor being the starting end and the other end of the conductor being the tail wire end, characterized in that: The winding fixture for achieving vertical positive pressure on the tail wire includes a lower die assembly and an upper die assembly. The upper die assembly includes an upper die base, a movable rod inserted into the upper die base, a first crossbar inserted into the movable rod, a fixed ring seat disposed on the first crossbar, a transmission block disposed on the fixed ring seat, a limiting rod disposed on the movable rod, a second pressure block slidably disposed on the movable rod, and a second crossbar inserted into the second pressure block. The upper die base is provided with a movable hole for accommodating the movement of the movable rod and passing through it, a first sliding groove for accommodating the movement of the first crossbar, and a second sliding groove for accommodating the movement of the limiting rod. The end of the movable rod near the lower die assembly is provided with a third sliding groove and a limiting sliding structure. The extension direction of the third sliding groove is perpendicular to the movement direction of the movable rod. The limiting sliding structure is used to set the second pressure block and make it slide along the limiting sliding structure. The sliding direction of the sliding structure is parallel to the extension direction of the third sliding groove. A fourth sliding groove is provided at the middle section of the movable rod for passing through the first crossbar. The first crossbar passes through the fourth sliding groove and its two ends are movably inserted through the first sliding groove. One end of the transmission block is connected to the fixed ring seat, and the other end is provided with a third inclined surface. The limiting rod passes through the movable rod and its two ends are movably disposed in the second sliding groove. A fifth elastic element is provided between the limiting rod and the first crossbar. In the free state, the fifth elastic element pushes the first crossbar to move away from the limiting rod, so that the first crossbar is located at the end of the fourth sliding groove away from the limiting rod in the free state. The second pressure block is slidably disposed on the limiting sliding structure. One end of the second pressure block is provided with a fourth inclined surface, which abuts against the third inclined surface. The second crossbar is inserted on the second pressure block and its two ends are slidably disposed in the third sliding groove. A sixth elastic element is provided between the second pressure block and the movable rod.
2. The winding fixture for achieving vertical positive pressure on the tail wire as described in claim 1, characterized in that: The upper mold assembly also includes an upper fixing seat disposed on the upper mold base. The upper fixing seat has a second fixing port at one end facing the lower mold assembly, and the other end of the coil frame is inserted into the second fixing port.
3. The winding fixture for achieving vertical positive pressure on the tail wire as described in claim 1, characterized in that: The central axis of the movable hole is coaxial with the central axis of the upper mold base. The central axis of the first sliding groove is perpendicular to the central axis of the movable hole and extends parallel to the central axis of the movable hole. The central axis of the second sliding groove is perpendicular to the central axis of the movable hole and extends parallel to the central axis of the movable hole. The first sliding groove and the movable hole are interconnected.
4. The winding fixture for achieving vertical positive pressure on the tail wire as described in claim 1, characterized in that: A limiting block is provided at the end of the movable rod away from the lower mold assembly. A fourth elastic element is sleeved on the movable rod. One end of the fourth elastic element abuts against the limiting block, and the other end abuts against the upper fixed seat. The movable rod is pushed in a free state by the elastic force of the fourth elastic element itself to move away from the lower mold assembly.
5. The winding fixture for achieving vertical positive pressure on the tail wire as described in claim 1, characterized in that: The limiting sliding structure is U-shaped and has limiting blocks facing each other at the opening.
6. The winding fixture for achieving vertical positive pressure on the tail wire as described in claim 1, characterized in that: The lower mold assembly includes a lower mold base, a mounting base disposed on the lower mold base, a slider slidably disposed on the mounting base, a first elastic member disposed between the slider and the mounting base, a first pressure block slidably disposed on the slider, a second elastic member disposed between the first pressure block and the slider, and a drive rod slidably disposed on the mounting base.
7. The winding fixture for achieving vertical positive pressure on the tail wire as described in claim 6, characterized in that: The slider has the first pressure block at one end and the first inclined surface at the other end. The first elastic element abuts against the mounting base at one end and against the slider at the other end. The slider slides in a direction that is close to or away from the lower mold base.
8. The winding fixture for achieving vertical positive pressure on the tail wire as described in claim 6, characterized in that: The sliding direction of the drive rod is perpendicular to the sliding direction of the slider. One end of the drive rod is provided with a second inclined surface, and the other end is provided with a sliding wheel. The second inclined surface and the first inclined surface abut against each other. A third elastic element is also provided between the drive rod and the mounting base. One end of the third elastic element is fixedly connected to the mounting base, and the other end is fixedly connected to the drive rod.
9. The winding fixture for achieving vertical positive pressure on the tail wire as described in claim 1, characterized in that: The winding fixture for achieving vertical positive pressure on the tail wire also includes a wire clamp assembly disposed on the lower die assembly.