A dished concave bottom flange nut and its forming equipment

Abstract

This invention discloses a dish-shaped concave bottom flange nut and its forming equipment, relating to the field of milling technology. It aims to solve the technical problem of cumbersome processing procedures in existing machining equipment when milling multiple groove structures on flange nuts. The invention includes a positioning base and a clamping mechanism. The positioning base includes an annular plate, on which a milling machine assembly is arranged. The milling machine assembly includes a sliding frame slidably arranged on the annular plate, and an inclined frame slidably arranged vertically on the side wall of the sliding frame. A milling cutter is mounted on the inclined frame. A control assembly is mounted on the top of the positioning base, including a path adjustment assembly and a drive assembly. The path adjustment assembly includes multiple arc-shaped grooves and multiple lifting grooves. This invention has the advantage of efficiently milling deformation grooves and partition grooves on flange nuts using two movement trajectories of the milling cutter.

Description

Technical Field

[0001] This invention relates to the field of milling technology, and more specifically, to a dish-shaped concave bottom flange nut and its forming equipment. Background Technology

[0002] Flange nuts are commonly used fasteners in mechanical connections. With their one-piece flange structure, they can effectively increase the contact area with the connected parts, improve connection stability and anti-loosening performance, and are widely used in automobile manufacturing, construction machinery, rail transportation and other fields.

[0003] Currently, most conventional flange nuts have an integral flat flange structure. After the flat flange is fitted with the connected parts, the nut is prone to preload loss, loosening and uncoupling under long-term vibration and alternating load conditions, leading to loose connection failure.

[0004] Furthermore, existing machining equipment for milling flange nuts typically involves cutting grooves based on the groove orientation. This is especially problematic when multiple grooves are involved, requiring separate clamping, multiple positioning corrections, and individual cutting in each process. This not only results in a cumbersome machining process and large positioning errors but also low production efficiency. Therefore, we propose a dished concave bottom flange nut and its forming equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a dish-shaped concave bottom flange nut and its forming equipment, so as to solve the technical problem of cumbersome processing flow when existing processing equipment mills flange nuts with multiple groove structures.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a dished concave bottom flange nut, comprising a nut body, wherein a flange is integrally formed at the bottom of the nut body; the flange sidewall is provided with an annular deformation groove, the deformation groove dividing the flange into an annular reinforcing block and a flange plate; the bottom surface of the flange plate is composed of a dish surface and a washer surface, the dish surface being a dished concave bottom structure; the flange plate is provided with multiple partition grooves along the circumference, the partition grooves dividing the flange plate into multiple extruded plates; the top surface of the extruded plate forms the inner wall of the deformation groove, and the bottom surface forms the dish surface; the inner end face of the deformation groove near the root of the extruded plate is an arc-shaped structure, the arc-shaped structure forming the bending deformation fulcrum of the extruded plate.

[0007] A flange nut forming device, applicable to the aforementioned flange nuts, includes a positioning base and a clamping mechanism. The clamping mechanism is arranged above the positioning base. The positioning base includes an annular plate, on which a milling machine assembly is arranged. The milling machine assembly includes a sliding frame slidably arranged on the annular plate, and an inclined frame slidably arranged vertically on the side wall of the sliding frame. A milling cutter driven by a motor is mounted on the inclined frame. A control assembly is installed on the top of the positioning base. The control assembly includes a path adjustment assembly and a drive assembly. The path adjustment assembly includes multiple arc-shaped grooves and multiple lifting grooves. The lifting grooves are arranged between every two arc-shaped grooves and are capable of lifting movement. The descending grooves combine to form a path groove; when the descending groove descends to the lower limit position, the path groove forms a horizontal annular groove structure; when the descending groove rises to the upper limit position, the path groove forms a rising annular groove structure; the inclined frame sidewall is connected to a transmission column, which is movably arranged within the path groove; when the path groove is a horizontal annular groove structure, the drive assembly can drive the transmission column to perform a circular path movement within the path groove, causing the milling cutter to perform circumferential milling on the flange sidewall to form the deformation groove; when the path groove is a rising annular groove structure, the drive assembly can drive the transmission column to perform a wave-like rising and falling annular path movement within the path groove, causing the milling cutter to mill multiple partition groove structures.

[0008] Preferably, the positioning base has a nut groove on its top for positioning the nut body; the clamping mechanism includes a clamping head driven by a cylinder, which is arranged above the nut groove; the clamping head can press down on the washer surface to clamp and fix the positioned nut.

[0009] Preferably, the top of the tilting frame is an inclined surface, and the tilt angle of the inclined surface is consistent with the tilt angle of the cross-section of the deformation groove; a moving unit is installed on the inclined surface of the tilting frame, the moving unit is a linear moving structure driven by a motor and a lead screw, the moving end of the moving unit is connected to a milling frame, the milling cutter is installed on the milling frame, and the tilt angle of the milling cutter is consistent with the tilt angle of the top inclined surface of the tilting frame.

[0010] Preferably, the end of the milling cutter has a rounded end structure, which is used to form the arc-shaped structure of the inner end face of the deformation groove.

[0011] Preferably, the path adjustment component comprises a path support component and a path deformation component; the path support component includes a support ring plate, which is arranged concentrically with the annular ring plate; the bottom of the support ring plate is connected to the top of the positioning base via multiple arc blocks; the top of the support ring plate is connected to a fixing ring plate via an annular cover; wherein, the top of the support ring plate is also integrally formed with an annular protrusion plate, and the annular protrusion plate is connected to multiple lower arc plates arranged in an annular array on the side near the positioning base, with a lower lifting groove formed between every two lower arc plates; the bottom of the fixing ring plate is integrally formed with multiple upper arc plates arranged in an annular array, with an upper lifting groove formed between every two upper arc plates; the lower lifting groove is aligned with the upper lifting groove.

[0012] Preferably, the path deformation component includes a lower sliding plate that is slidably arranged in the lower lifting groove and an upper sliding plate that is slidably arranged in the upper lifting groove; the sidewalls of the plurality of lower sliding plates are connected by a lower annular sliding plate, and the lower annular sliding plate is movably arranged in the inner cavity of the support ring plate; the sidewalls of the plurality of upper sliding plates are connected by an upper annular sliding plate, and the upper annular sliding plate is movably arranged in the inner cavity of the fixed ring plate; the lower annular sliding plate and the upper annular sliding plate are connected by a plurality of fixing frames, and the fixing frames are spaced apart on the outer side of the support ring plate and the fixed ring plate.

[0013] Preferably, the gap between the lower arc plate and the upper arc plate forms the arc-shaped groove, and the gap between the lower sliding plate and the upper sliding plate forms the lifting groove; wherein, the width of the lower sliding plate is smaller than the width of the upper sliding plate; when the lower sliding plate is located at the lower limit position of the lower lifting groove, the arc-shaped groove and the lifting groove are in a connected state, forming the horizontal annular groove structure; when the lower sliding plate slides upward into the upper lifting groove, so that the upper sliding plate is located at the upper limit position of the upper lifting groove, the gap between the side wall of the lower sliding plate and the side wall of the upper arc plate is used to connect the arc-shaped groove and the lifting groove, forming the vertical section of the lifting annular groove structure; multiple lifting cylinders are installed on the outer wall of the positioning base, and the output end of the lifting cylinder is connected to the side wall of the fixing frame.

[0014] Preferably, the driving assembly includes a lower driving ring frame and an upper driving ring frame, the upper driving ring frame being connected to the top of the lower driving ring frame to form an internal hollow structure; the lower driving ring frame is rotatably arranged between the annular convex plate and the annular cover; the top of the lower driving ring frame is provided with multiple tooth-like structures, and the bottom of the upper driving ring frame is provided with multiple tooth-like structures of the same structure, forming a continuous undulating zigzag driving groove between the tooth-like structures of the lower driving ring frame and the tooth-like structures of the upper driving ring frame; the transmission column passes through the path groove and extends into the driving groove; when the transmission column is located in the arc-shaped groove of the path groove, the end of the transmission column is located at the lower end of the driving groove; the side wall of the lower driving ring frame is also provided with toothed openings, the side wall of the annular cover is provided with a connecting groove, and the side wall of the annular cover is also rotatably arranged with a driving gear, the driving gear being meshed with the toothed openings through the connecting groove; a rotary motor is installed on the top of the fixed ring plate, and the output end of the rotary motor is connected to the driving gear.

[0015] Preferably, the lower sliding plate has a groove at its top, and multiple sliding rods are connected to the inner wall of the groove. A wedge is slidably fitted on each sliding rod, and the end of each sliding rod extends into the inner cavity of the wedge and is connected to a limiting plate. A spring is also fitted on the sliding rod, with one end connected to the inner wall of the groove and the other end connected to the side wall of the wedge. The end of the wedge extends out of the groove and into the vertical section of the lifting annular groove structure. The bottom of the wedge has an inclined surface structure. When the transmission column moves from bottom to top in the vertical section of the lifting annular groove structure, it can squeeze the inclined surface structure of the wedge and enter above the wedge. The bottom of the upper arc plate has the same structural shape as the groove, and structural components with the same shape but opposite direction as the wedge are arranged in the groove structure of the upper arc plate. Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by creating an annular deformation groove on the side wall of the flange and combining it with multiple circumferentially distributed partition grooves, splits the bottom surface of a traditional integral flange into multiple independent, elastically deformable extruded plates. Simultaneously, the bottom surface of the extruded plates is designed as a dish-shaped concave structure, coupled with the arc-shaped fulcrum structure near the root of the extruded plates, improving the locking force capacity of the flange nut. Compared to traditional flat flange nuts, in this structure, during the tightening process, each extruded plate first contacts the mounting surface and, relying on the arc-shaped fulcrum at its root, undergoes uniform and stable elastic bending, generating a pre-tightening force that reacts to the mounting surface. This results in a stable connection between the nut and the mounting surface, ensuring a tight, secure, and anti-loosening connection.

[0016] 2. The present invention also ensures the overall structural strength of the nut by forming an integral ring-shaped reinforcing block through the deformation groove of the flange. Furthermore, when the tightening load of the nut increases, the elastic bending angle of each extrusion plate increases synchronously. At this time, the bottom edge of the ring-shaped reinforcing block can limit and abut against the extrusion plate, which can not only provide force support and deformation limit for the extrusion plate, but also prevent the extrusion plate from bending too much, causing the elastic function of elastic deformation to fail and lose the pre-tightening and anti-loosening effect.

[0017] 3. This invention designs a forming device including a milling cutter. By moving the milling cutter along different paths, it can mill annular deformation grooves and multiple circumferentially spaced dividing grooves onto a pre-formed, ungrooved flange nut. A control component is designed on top of the positioning base. Utilizing the cooperation between the control component's path adjustment component and the transmission column, along with the multiple arc-shaped grooves and multiple lifting grooves of the path adjustment component, the combined path groove can be modified to form a horizontal annular groove structure or a lifting annular groove structure; that is, when the lifting groove descends to the lower limit position, the path groove becomes a horizontal annular groove. When forming a groove structure, the milling cutter performs a circular motion to mill and shape the deformation groove. When the lifting groove rises to the upper limit position, causing the path groove to become a lifting annular groove structure, the milling cutter performs a wave-like lifting annular motion to mill and shape multiple dividing grooves. By simply switching between the two path shapes of the path groove, the milling machine assembly can achieve two movement trajectories of the milling cutter during the circular motion, efficiently milling the deformation groove and dividing groove of the flange nut. This solves the problem that traditional milling of deformation grooves and multiple dividing grooves requires separate clamping, multiple positioning corrections, and separate machining of two grooves, resulting in a cumbersome processing flow and low production efficiency.

[0018] 4. This invention designs a path adjustment component and utilizes a path support component to provide a stable installation and guiding foundation. The support ring plate and the fixed ring plate cooperate to form an upper and lower aligned lifting slide groove. The lower and upper sliding plates of the path deformation component are respectively installed in the two types of slide grooves and are connected to the fixed frame through the lower and upper annular sliding plates, which can move up and down synchronously. This, in conjunction with the lower and upper arc plates, forms a path groove with a switchable shape, providing a horizontal annular or wave-like lifting motion track for the transmission column, realizing rapid switching of the milling cutter machining path.

[0019] 5. This invention designs a drive assembly that utilizes a continuous, undulating, zigzag-shaped drive groove formed between the lower and upper drive frames. When the rotary motor drives the drive gear to rotate, the drive gear, through its teeth, causes the lower and upper drive frames to rotate as a whole. The drive groove rotates synchronously and pushes the transmission column along the path groove. When the path groove is a horizontal annular groove structure, the transmission column moves smoothly along the horizontal annular path, driving the milling cutter to perform a pure circular motion, achieving the effect of continuous circumferential milling to form a deformation groove. When the path groove is a lifting annular groove structure, the transmission column moves along a wave-like lifting annular path, driving the milling cutter to perform a combined circular and lifting motion. The transmission column first moves along an arc... The groove moves horizontally in a circular motion until it reaches the vertical section. There, it is lifted by the broken section of the drive groove and rises along the vertical section into the lifting groove. During the ascent, the milling cutter completes the milling of the dividing groove. Then, the drive column continues to move horizontally forward in the lifting groove and enters the next vertical section, which is the initial end of the milling of another dividing groove. It is then driven by the downward slope of the drive groove from the high end to the low end and falls back from the lifting groove through the vertical section to the arc groove, completing the milling of the next dividing groove. This cycle realizes continuous wave-like lifting and circular motion and orderly processing of multiple dividing grooves, achieving the effect of intermittent milling to form multiple dividing grooves. The processing of two types of grooves can be completed with only one drive mechanism.

[0020] 6. This invention also includes a groove at the top of the lower sliding plate, within which a retractable wedge is assembled via a sliding rod, a limiting plate, and a spring. The wedge extends into the vertical section of the lifting annular groove, forming an inclined guide surface. A corresponding retractable wedge assembly with the same structure but opposite direction is provided at the bottom of the upper arc plate. When the transmission column moves from bottom to top in the vertical section, it compresses the inclined surface of the wedge, causing it to retract and avoid obstruction. After smoothly entering above the wedge, the wedge is reset and limited by the spring, preventing the transmission column from moving from a high position to a low position within the continuously undulating, zigzag-shaped drive groove during the drive groove's operation. When transitioning from one point to a lower point, the drive column may mistakenly enter the vertical section that has already risen and unexpectedly fall back or reverse, causing it to be unable to complete the continuous wave-like lifting and lowering circular motion. Similarly, when the drive column moves from top to bottom in another vertical section, it squeezes the reverse wedge block to retract and fall below, so that the drive column completes directional lifting, one-way passage, and orderly circulation according to the preset path, always maintaining the coordination of circular motion and lifting motion. This ensures that the milling cutter can stably achieve continuous and uninterrupted milling of the dividing groove, effectively avoiding problems such as path confusion, motion jamming, and processing interruption. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the flange nut structure of the present invention.

[0022] Figure 2 This is a cross-sectional view of the flange nut structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the overall structure of the molding equipment of the present invention.

[0024] Figure 4 This is a schematic diagram of the positioning base and clamping head structure of the present invention.

[0025] Figure 5 This is a schematic diagram of the milling machine assembly structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the milling cutter structure of the present invention.

[0027] Figure 7 This is a schematic diagram of the control component structure of the present invention.

[0028] Figure 8 This is a cross-sectional schematic diagram of the annular cover of the control component of the present invention.

[0029] Figure 9 This is a schematic diagram showing the split structure of the path support component and the driving component of the present invention.

[0030] Figure 10 This is a schematic diagram of the path deformation component structure of the present invention.

[0031] Figure 11 This is a schematic diagram of one usage state of the lifting annular groove structure of the present invention.

[0032] Figure 12 This is a schematic diagram of one usage state of the horizontal annular groove structure of the present invention.

[0033] Figure 13 for Figure 11 Enlarged schematic diagram of the structure at point A in the middle.

[0034] Figure 14 This is a schematic diagram of the wedge block structure of the present invention.

[0035] Figure 15 This is a schematic diagram showing the disassembled and cross-sectional structure of the lower drive ring and the upper drive ring of the present invention.

[0036] Figure 16 This is a schematic diagram of the transmission column of the present invention in one usage state.

[0037] Explanation of the labels in the diagram: 1. Nut body; 2. Deformation groove; 3. Annular reinforcing block; 4. Flange plate; 5. Positioning base; 6. Clamping mechanism; 7. Milling machine assembly; 8. Control assembly; 9. Lifting cylinder; 401. Disc surface; 402. Washer surface; 403. Divider groove; 404. Extruded sheet; 501. Nut groove; 502. Annular ring plate; 503. Annular slide rail; 601. Pressing head; 701. Sliding frame; 702. Tilt frame; 703. Moving unit; 704. Milling frame; 705. Milling cutter; 706. Slider; 707. Transmission column; 81. Path adjustment component; 82. Drive component; 8101. Arc groove; 8102. Lifting groove; 8103. Support ring plate; 8104. Arc block; 8105. Annular cover; 8106. Fixing ring plate; 8107. Annular convex plate; 8108. Annular slide groove one; 8109. Lower arc plate; 8110. Lower lifting slide groove; 8111. Annular slide groove two; 8112. Upper arc plate; 8113. Upper lifting slide groove; 8114. Lower slide plate; 8115. Upper slide plate; 8116. Lower annular slide plate; 8117. Upper annular slide plate; 8118. Fixing frame; 8119. Connecting groove; 8120. Drive gear; 8121. Rotary motor; 8122. Groove; 8123. Slide rod; 8124. Wedge block; 8125. Limiting plate; 8126. Spring; 8201. Lower drive ring frame; 8202. Upper drive ring frame; 8203. Slide bar one; 8204. Slide bar two; 8205. Drive groove; 8206. Toothed opening. Detailed Implementation

[0038] Example 1, as Figures 1 to 2 As shown, this embodiment provides a dished concave bottom flange nut, including a nut body 1, with a flange integrally formed at the bottom of the nut body 1; the flange sidewall has an annular deformation groove 2, which divides the flange into annular reinforcing blocks 3 and flange plates 4; the bottom surface of the flange plate 4 is composed of a dish surface 401 and a washer surface 402, the washer surface 402 is a planar structure in the horizontal direction, used to place an elastic washer when the flange nut is tightened, so that the washer can be stably fitted between the washer surface 402 and the mounting surface; the dish surface 401 has a dished concave bottom structure; the flange plate 4 has multiple equally spaced partition grooves 4 along the circumference. 03, the partition groove 403 divides the flange plate 4 into multiple extruded plates 404; the top surface of the extruded plate 404 forms the inner wall of the deformation groove 2, and the bottom surface forms a disc 401; the inner end face of the deformation groove 2 near the root of the extruded plate 404 is an arc-shaped structure, which forms the bending deformation fulcrum of the extruded plate 404; when the nut is not tightened, the extruded plate 404 is in an inclined state with the outside lower and the inside higher; when the nut is tightened, the extruded plate 404 undergoes elastic bending deformation in the axial direction under the axial compression of the mounting surface, with the arc-shaped structure as the fulcrum, and is compressed and stored to form an axial preload force acting on the mounting surface.

[0039] This invention, by creating an annular deformation groove 2 on the side wall of the flange and combining it with multiple circumferentially distributed partition grooves 403, splits the bottom surface of a traditional integral flange into multiple independent elastically deformable extrusion plates 404. Simultaneously, the bottom surface of the extrusion plates 404 is designed as a dish-shaped concave surface 401 structure, combined with the arc-shaped fulcrum structure near the root of the extrusion plates 404 in the deformation groove 2, improving the locking force capacity of the flange nut. Compared to traditional flat flange nuts, in this structure, during the tightening process, each extrusion plate 404 first contacts the mounting surface and, relying on the arc-shaped fulcrum at its root, undergoes uniform and stable elastic bending, generating a pre-tightening force that reacts to the mounting surface, resulting in a stable connection between the nut and the mounting surface that is mutually fitted, locked, and prevents loosening and slippage.

[0040] At the same time, the elastic potential energy stored in the multiple independent extrusion plates of 404 after compression forms multiple independent output axial preloads, which effectively compensate for the gap changes caused by equipment vibration and slight loosening of bolts, and solves the defects of ordinary flange nuts that are easy to loosen after long-term use, have poor locking stability, and weak anti-loosening performance.

[0041] In addition, the integrally formed annular reinforcing block 3 formed by the deformation groove 2 of the flange can ensure the overall structural strength of the nut. Furthermore, when the tightening load of the nut increases, the elastic bending angle of each extrusion plate 404 increases synchronously. At this time, the bottom edge of the annular reinforcing block 3 can limit and abut against the extrusion plate 404, which can provide force support and deformation limit for the extrusion plate 404, and also prevent the extrusion plate 404 from bending too much, causing the elastic function of elastic deformation to fail and lose the pre-tightening and anti-loosening effect.

[0042] If the flange 4 does not have a partition groove 403 and is an integral dish-shaped concave bottom structure, it is difficult to achieve uniform elastic deformation in the circumference, and it is impossible to stably generate a balanced preload, resulting in a significant decrease in the locking and anti-loosening effect.

[0043] Example 2, as Figures 3 to 16 As shown, this embodiment provides a flange nut forming device, which is applicable to the flange nut of Embodiment 1. It includes a positioning base 5 and a clamping mechanism 6, with the clamping mechanism 6 arranged above the positioning base 5. The top of the positioning base 5 has a nut groove 501, which is used to position the nut body 1. The clamping mechanism 6 is a conventional cylinder-driven lifting structure. The clamping mechanism 6 includes a clamping head 601 driven by a cylinder. The bottom of the clamping head 601 is a circular plate structure, and the clamping head 601 is arranged above the nut groove 501. The clamping head 601 can press down on the washer surface 402 to clamp and fix the nut after positioning.

[0044] In the initial feeding stage, simply insert the nut body 1 of the flange nut into the nut groove 501, and then drive the clamping head 601 to descend and press it onto the washer surface 402 through the cylinder, thus forming the initial positioning and clamping effect of the flange nut.

[0045] In an embodiment of the present invention, the positioning base 5 includes an annular plate 502, on which a milling machine assembly 7 is arranged; the milling machine assembly 7 includes a sliding frame 701 slidably arranged on the annular plate 502, an inclined frame 702 slidably arranged on the side wall of the sliding frame 701 in a vertical direction, a vertical slide rail structure arranged on the outer side wall of the sliding frame 701, and a corresponding slide seat structure arranged on the inner side wall of the inclined frame 702. The sliding frame 701 slides vertically through the cooperation of the slide seat structure and the slide rail structure; a milling cutter 705 driven by a motor is installed on the inclined frame 702; a transmission column 707 is connected to the side wall of the inclined frame 702; when the transmission column 707 is subjected to a horizontal thrust, it can drive the milling machine assembly 7 to move horizontally, and when the transmission column 707 is subjected to a vertical thrust, it can drive the inclined frame 702 to move vertically along the sliding frame 701.

[0046] Furthermore, a control component 8 is installed on the top of the positioning base 5. The control component 8 includes a path adjustment component 81 and a drive component 82. The path adjustment component 81 includes multiple arc-shaped grooves 8101 and multiple lifting grooves 8102. The lifting grooves 8102 are arranged between every two arc-shaped grooves 8101 and can move up and down. The multiple arc-shaped grooves 8101 and multiple lifting grooves 8102 combine to form a path groove. When the lifting groove 8102 descends to the lower limit position, the path groove forms a horizontal annular groove structure. The horizontal annular groove structure is a horizontal, closed annular groove structure. When the lifting groove 8102 rises to the upper limit position, the path groove forms a lifting annular groove structure. The lifting annular groove structure is a closed annular groove composed of alternating horizontal arc-shaped segments and vertical segments. The overall structure is a wave-like lifting annular closed groove structure.

[0047] It is worth noting that the transmission column 707 is movably arranged within the path groove. When the path groove is a horizontal annular groove structure, the drive assembly 82 can drive the transmission column 707 to perform a circular path movement within the path groove, thereby driving the milling machine assembly 7 to perform a circular path movement, causing the milling cutter 705 to perform circumferential milling on the flange sidewall, forming the deformation groove 2. When the path groove is a lifting annular groove structure, the drive assembly 82 can drive the transmission column 707 to perform a wave-like lifting annular path movement within the path groove, that is, to perform a compound movement of alternating arc-shaped translation and vertical lifting along the path groove. Specifically, it can first drive the tilting frame 702 to perform a circular path movement. The movement continues for a certain distance and then stops. The transmission column 707 drives the tilting frame 702 to rise, and then the milling cutter 705 moves vertically upward from the deformation groove 2, milling out the partition groove 403 structure from bottom to top. Then, the tilting frame 702 continues to move forward in a circular path, and after moving for a certain distance, it stops. The transmission column 707 drives the tilting frame 702 to fall, so that the milling cutter 705 falls from above into the deformation groove 2, forming another adjacent partition groove 403 structure milled from top to bottom. Then, the tilting frame 702 continues to move forward in a circular path, and so on, milling out multiple partition groove 403 structures.

[0048] This invention designs a molding device including a milling cutter 705. By moving the milling cutter 705 along different paths, it can mill an annular deformation groove 2 and multiple circumferentially spaced partition grooves 403 into a flange nut that has not yet been slotted after initial molding. A control component 8 is designed on the top of the positioning base 5. Utilizing the cooperation between the path adjustment component 81 and the transmission column 707, and the multiple arc-shaped grooves 8101 and multiple lifting grooves 8102 of the path adjustment component 81, the combined path groove can be modified to form a horizontal annular groove structure or a lifting annular groove structure; that is, when the lifting groove 8102 descends to the lower limit position, the path groove becomes horizontal. When the annular groove structure is formed, the milling cutter 705 performs a circular motion to mill and form the deformation groove 2. When the lifting groove 8102 rises to the upper limit position and the path groove becomes a lifting annular groove structure, the milling cutter 705 performs a wave-like lifting annular motion to mill and form multiple partition grooves 403. By simply switching between the two path shapes of the path groove, the milling machine assembly 7 can realize the two motion trajectories of the milling cutter 705 during the circular motion, efficiently milling the deformation groove 2 and partition groove 403 of the flange nut. This solves the problem that traditional milling of deformation groove 2 and multiple partition grooves 403 requires separate clamping, multiple positioning corrections, and separate processing of two grooves, resulting in a cumbersome processing flow and low production efficiency.

[0049] In an embodiment of the present invention, the annular plate 502 and the nut groove 501 are in a concentric circle position structure; multiple annular slide rails 503 are arranged on the inner and outer walls of the annular plate 502; the sliding frame 701 has an N-shaped structure, and multiple sliders 706 are arranged on the inner wall of the sliding frame 701. The sliding frame 701 is sleeved on the annular plate 502 through its N-shaped structure, and forms an annular trajectory sliding through the sliding cooperation between the sliders 706 and the annular slide rails 503.

[0050] In an embodiment of the present invention, the top of the tilting frame 702 is an inclined surface, and the tilt angle of the inclined surface is consistent with the tilt angle of the cross-section of the deformation groove 2. A moving unit 703 is installed on the inclined surface of the tilting frame 702. The moving unit 703 is a conventional motor-driven linear moving structure with a lead screw. The moving end of the moving unit 703 is connected to a milling frame 704, and a milling cutter 705 is installed on the milling frame 704. The tilt angle of the milling cutter 705 is consistent with the tilt angle of the top inclined surface of the tilting frame 702. The top inclined surface of the tilting frame 702 maintains the same tilt angle as the cross-section of the deformation groove 2. The moving unit 703 drives the milling frame 704 and the milling cutter 705 to move linearly along the inclined surface through the motor-driven lead screw, so that the milling cutter 705 always feeds and mills at a matching tilt angle to the deformation groove 2, ensuring that the cutting angle of the milling cutter 705 matches the tilt angle of the groove, thereby stably machining the deformation groove 2 with accurate angle and ensuring the forming quality of the groove.

[0051] In an embodiment of the present invention, the end of the milling cutter 705 is a round-headed structure, used to form an arc-shaped structure on the inner end face of the deformation groove 2. In this embodiment, the end of the milling cutter 705 is set to a round-headed structure. During the milling process of the deformation groove 2, the round-headed milling cutter 705 feeds along a preset path and can directly form a smooth and continuous arc-shaped inner end face at the position of the deformation groove 2 near the root of the extrusion plate 404. This arc-shaped surface naturally forms a fulcrum structure for the elastic bending of the extrusion plate 404, without the need for subsequent grinding or secondary processing. This ensures that the fulcrum arc dimension is accurate and the transition is smooth, ensuring that the extrusion plate 404 bends smoothly under force and is not prone to stress concentration.

[0052] In an embodiment of the present invention, the path adjustment component 81 consists of a path support component and a path deformation component.

[0053] The path support component includes a support ring plate 8103, which is arranged concentrically with the annular ring plate 502. The bottom of the support ring plate 8103 is connected to the top of the positioning base 5 via multiple arc blocks 8104. The top of the support ring plate 8103 is connected to a fixing ring plate 8106 via an annular cover 8105. The top of the support ring plate 8103 also has an integrally formed annular convex plate 8107. The annular convex plate 8107 is connected to multiple lower arc plates 8109 arranged in annular array on the side near the positioning base 5. A lower lifting groove 8110 is formed between every two lower arc plates 8109. The bottom of the fixing ring plate 8106 has an integrally formed multiple upper arc plates 8112 arranged in annular array. An upper lifting groove 8113 is formed between every two upper arc plates 8112. The lower lifting groove 8110 and the upper lifting groove 8113 are aligned.

[0054] Furthermore, the path deformation component includes a lower sliding plate 8114 that is slidably arranged in the lower lifting groove 8110 and an upper sliding plate 8115 that is slidably arranged in the upper lifting groove 8113; the sidewalls of the multiple lower sliding plates 8114 are connected by a lower annular sliding plate 8116, which is movably arranged in the inner cavity of the support ring plate 8103; the sidewalls of the multiple upper sliding plates 8115 are connected by an upper annular sliding plate 8117, which is movably arranged in the inner cavity of the fixed ring plate 8106; the lower annular sliding plate 8116 and the upper annular sliding plate 8117 are connected by multiple fixing brackets 8118, which are spaced apart on the outer side of the support ring plate 8103 and the fixed ring plate 8106.

[0055] This invention designs a path adjustment component 81 and utilizes a path support component to provide a stable installation and guiding foundation. The support ring plate 8103 and the fixed ring plate 8106 cooperate to form an upper and lower aligned lifting slide 8110 and an upper lifting slide 8113. The lower slide plate 8114 and the upper slide plate 8115 of the path deformation component are respectively installed in the two types of slides, and are connected to the fixed frame 8118 through the lower annular slide plate 8116 and the upper annular slide plate 8117, which can move up and down synchronously. This, together with the lower arc plate 8109 and the upper arc plate 8112, forms a path groove with a switchable shape, providing a horizontal annular or wave-like lifting motion track for the transmission column 707, realizing the rapid switching of the milling cutter 705's machining path.

[0056] In an embodiment of the present invention, the gap between the lower arc plate 8109 and the upper arc plate 8112 forms an arc-shaped groove 8101, and the gap between the lower sliding plate 8114 and the upper sliding plate 8115 forms a lifting groove 8102; wherein, the width of the lower sliding plate 8114 is smaller than the width of the upper sliding plate 8115; when the lower sliding plate 8114 is located at the lower limit position of the lower lifting groove 8110, the arc-shaped groove 8101 and the lifting groove 8102 are in a connected state, forming a horizontal annular groove structure; when the lower sliding plate 811... 4. Slide upwards into the upper lifting slide 8113. When the upper slide plate 8115 is at the upper limit position of the upper lifting slide 8113, the gap between the side wall of the lower slide plate 8114 and the side wall of the upper arc plate 8112 is consistent with the width of the path groove. This gap is the vertical section of the path groove, which is used to connect the arc groove 8101 and the lifting groove 8102 to form the vertical section of the lifting annular groove structure. Multiple lifting cylinders 9 are installed on the outer side wall of the positioning base 5. The output end of the lifting cylinder 9 is connected to the side wall of the fixed frame 8118.

[0057] By simply driving the fixed frame 8118 through the lifting cylinder 9 to synchronously raise and lower the lower slide plate 8114 and the upper slide plate 8115, the path groove can be quickly switched between a horizontal annular groove and a lifting annular groove, thereby allowing the milling cutter 705 to automatically complete the continuous machining of the deformation groove 2 and the partition groove 403.

[0058] In an embodiment of the present invention, the driving assembly 82 includes a lower driving ring frame 8201 and an upper driving ring frame 8202. The upper driving ring frame 8202 is connected to the top of the lower driving ring frame 8201, forming an internal hollow structure. The lower driving ring frame 8201 is rotatably arranged between the annular convex plate 8107 and the annular cover 8105. A first slide bar 8203 is arranged on one side wall of the lower driving ring frame 8201, and a plurality of second slide bars 8204 are arranged on the other side wall. An annular groove 8108 is arranged on the side of the annular convex plate 8107 near the annular cover 8105, and a plurality of second annular grooves 8111 are arranged on the inner side wall of the annular cover 8105. The first slide bar 8203 is slidably engaged with the first annular groove 8108, and the second slide bar 8204 is slidably engaged with the second annular groove 8111. A plurality of toothed structures are arranged on the top of the lower driving ring frame 8201, and the bottom of the upper driving ring frame 8202 is... The lower drive ring 8201 has multiple identical toothed structures arranged in the upper drive ring 8202, forming a continuous undulating, zigzag-shaped drive groove 8205. The transmission column 707 passes through the path groove and extends into the drive groove 8205. When the transmission column 707 is located in the arc groove 8101 of the path groove, the end of the transmission column 707 is located at the lower end of the drive groove 8205. The side wall of the lower drive ring 8201 is also provided with a toothed opening 8206. The side wall of the annular cover 8105 is provided with a connecting groove 8119. The side wall of the annular cover 8105 is also rotatably arranged with a drive gear 8120. The drive gear 8120 is meshed with the toothed opening 8206 through the connecting groove 8119. A rotary motor 8121 is installed on the top of the fixed ring plate 8106. The output end of the rotary motor 8121 is connected to the drive gear 8120.

[0059] This invention designs a drive assembly 82, utilizing a continuously undulating, zigzag-shaped drive groove 8205 formed between the lower drive ring 8201 and the upper drive ring 8202. When the rotary motor 8121 drives the drive gear 8120 to rotate, the drive gear 8120, through the toothed edge 8206, drives the lower drive ring 8201 and the upper drive ring 8202 to rotate as a whole. The drive groove 8205 rotates synchronously and pushes the transmission column 707 to move along the path groove. When the path groove is a horizontal annular groove structure, the transmission column 707 moves smoothly along the horizontal annular path, driving the milling cutter 705 to perform pure circular motion, achieving the effect of continuous circumferential milling to form the deformation groove 2. When the path groove is a lifting annular groove structure, the transmission column 707 moves along a wave-like lifting annular path, driving the milling cutter 705 to perform a combined circular and lifting motion. 7. First, it moves horizontally in a circular motion along the arc-shaped groove 8101 until it reaches the vertical section. When it reaches the vertical section, it is lifted by the broken line segment of the drive groove 8205 and rises into the lifting groove 8102. During the rise, the milling cutter 705 completes the milling of the partition groove 403. Then, the transmission column 707 continues to move horizontally forward in the lifting groove 8102 and enters the next vertical section, which is the initial end of the milling of another partition groove 403. Then, it is driven by the downward inclined surface of the drive groove 8205 from the high end to the low end and falls back from the lifting groove 8102 through the vertical section to the arc-shaped groove 8101 to complete the milling of the next partition groove 403. This cycle realizes the continuous wave-like lifting and circular motion and the orderly processing of multiple partition grooves 403, achieving the effect of intermittent milling to form multiple partition grooves 403. The processing of two types of grooves can be completed with only one drive mechanism.

[0060] In an embodiment of the present invention, a groove 8122 is further provided on the top of the lower sliding plate 8114. Multiple sliding rods 8123 are connected to the inner wall of the groove 8122. A wedge block 8124 is slidably sleeved on the sliding rod 8123. The end of the sliding rod 8123 extends into the inner cavity of the wedge block 8124 and is connected to a limiting plate 8125. A spring 8126 is also sleeved on the sliding rod 8123. One end of the spring 8126 is connected to the inner wall of the groove 8122, and the other end is connected to the side wall of the wedge block 8124. The end of the wedge block 8124 extends out of the groove 8122 and into the vertical section of the lifting annular groove structure. 4. The bottom is an inclined surface structure. When the transmission column 707 moves from bottom to top in the vertical section of the lifting annular groove structure, it can squeeze the inclined surface structure of the wedge block 8124 and enter above the wedge block 8124. The bottom of the upper arc plate 8112 has the same structural shape as the groove 8122, and the groove 8122 of the upper arc plate 8112 has structural components that are the same as those of the wedge block 8124 but in the opposite direction. This is used for the transmission column 707 to squeeze the inclined surface structure of the wedge block 8124 and enter below the wedge block 8124 when the transmission column 707 moves from top to bottom in another vertical section of the lifting annular groove structure.

[0061] The present invention also includes a groove 8122 on the top of the lower sliding plate 8114. A retractable wedge 8124 is assembled within the groove 8122 via a sliding rod 8123, a limiting plate 8125, and a spring 8126. The wedge 8124 extends into the vertical section of the lifting annular groove and forms an inclined guide surface. A corresponding elastic wedge assembly with the same structure but opposite direction is provided at the bottom of the upper arc plate 8112. When the transmission column 707 moves from bottom to top in the vertical section, it presses against the inclined surface of the wedge 8124, causing it to retract and avoid obstruction. After smoothly entering above the wedge 8124, the wedge 8124 resets and is limited by the spring 8126, preventing the drive groove 8205 from driving the transmission column 707. When the drive column 707 transitions from a high point to a low point within the continuously undulating, zigzag-shaped drive groove 8205, it may accidentally enter a vertical section that has already risen and unexpectedly fall back or reverse its movement, causing it to be unable to complete the continuous wave-like lifting and lowering circular motion. Similarly, when the drive column 707 moves from top to bottom in another vertical section, it squeezes the reverse wedge block to retract and fall below, allowing the drive column 707 to complete directional lifting, one-way passage, and orderly circulation according to the preset path. It always maintains the coordination between the circular motion and the lifting motion, ensuring that the milling cutter 705 can stably achieve continuous and uninterrupted milling of the dividing groove 403, effectively avoiding problems such as path confusion, motion jamming, and processing interruption.

[0062] Working principle: In use, first, the nut body 1 to be processed is placed into the nut groove 501 at the top of the positioning base 5 to complete the positioning. Then, the clamping mechanism 6 is started, and the cylinder drives the clamping head 601 to press down on the washer surface 402 to firmly clamp and fix the nut. Then, the milling machine assembly 7 is started to rotate the milling cutter 705. First, the lifting cylinder 9 drives the fixing frame 8118 to lower the lower slide plate 8114 and the upper slide plate 8115 to the lower limit position, so that the arc groove of the path adjustment assembly 81 can be lowered. 8101 and the lifting groove 8102 are connected to form a horizontal annular groove structure. Then, the rotary motor 8121 is started, and the drive gear 8120 meshes with the toothed tooth 8206 to drive the lower drive ring frame 8201 and the upper drive ring frame 8202 to rotate as a whole. The drive groove 8205 rotates synchronously, pushing the transmission column 707 to move along the horizontal annular path, which in turn drives the sliding frame 701 to move in a circle along the annular plate 502. The moving unit 703 controls the milling frame 704 and the milling cutter 705 to feed linearly along the inclined surface of the inclined frame 702, gradually approaching the side wall of the flange, and continuously milling the flange in a circumferential direction to form the annular deformation groove 2 and its root arc-shaped support structure in one go. After the deformation groove 2 is processed, the lifting cylinder 9 is controlled to drive the fixed frame 8118 to raise the lower slide plate 8114 and the upper slide plate 8115 to the upper limit position, so that the path groove is switched to a lifting annular groove structure. The transmission column 707 is pushed by the drive groove 8205 along the wave-like lifting annular path. The radial motion first moves horizontally in a circular motion along the arc-shaped groove 8101. When it reaches the vertical section, it is lifted up. The milling cutter 705 mills the dividing groove 403 from bottom to top. After continuing to move, it falls back through another vertical section. Multiple dividing grooves 403 are processed in a cycle. During the process, the wedge block 8124 realizes the directional lifting and one-way passage of the transmission column 707 under the action of the spring 8126, avoiding path confusion and jamming. Finally, the processing of the deformation groove 2 and the dividing groove 403 is completed, and the finished dish-shaped concave bottom flange nut is obtained.

[0063] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A dish-shaped concave bottom flange nut, characterized in that, Includes a nut body (1), the bottom of which is integrally formed with a flange; The flange sidewall is provided with an annular deformation groove (2), which divides the flange into an annular reinforcing block (3) and a flange plate (4). The bottom surface of the flange (4) is composed of a disc surface (401) and a gasket surface (402), wherein the disc surface (401) is a disc-shaped concave bottom structure; The flange (4) has multiple partition grooves (403) along the circumferential direction, and the partition grooves (403) divide the flange (4) into multiple extruded plates (404). The top surface of the extruded sheet (404) forms the inner wall of the deformation groove (2), and the bottom surface forms the disc surface (401). The inner end face of the deformation groove (2) near the root of the extrusion plate (404) is an arc-shaped structure, and the arc-shaped structure forms the bending deformation fulcrum of the extrusion plate (404). When the nut is not tightened, the extrusion plate (404) is inclined with the outside lower and the inside higher. When the nut is tightened, the extrusion plate (404) is elastically bent and deformed in the axial direction with the arc-shaped structure as the fulcrum under the axial extrusion action of the mounting surface, and is compressed and stored to form an axial preload force acting on the mounting surface.

2. A forming device for flange nuts, applicable to the flange nuts described in claim 1, characterized in that, It includes a positioning base (5) and a clamping mechanism (6), the clamping mechanism (6) being arranged above the positioning base (5), the positioning base (5) including an annular plate (502), and a milling machine assembly (7) being arranged on the annular plate (502); The milling machine assembly (7) includes a sliding frame (701) slidably arranged on the annular plate (502), and an inclined frame (702) slidably arranged on the side wall of the sliding frame (701) in a vertical direction. A milling cutter (705) driven by a motor is mounted on the inclined frame (702). The positioning base (5) is equipped with a control component (8) on its top. The control component (8) includes a path adjustment component (81) and a drive component (82). The path adjustment component (81) includes multiple arc-shaped grooves (8101) and multiple lifting grooves (8102). The lifting grooves (8102) are arranged between every two arc-shaped grooves (8101) and can move up and down. The multiple arc-shaped grooves (8101) and the multiple lifting grooves (8102) combine to form a path groove. When the lifting groove (8102) descends to the lower limit position, the path groove forms a horizontal annular groove structure. When the lifting groove (8102) rises to the upper limit position, the path groove forms a lifting annular groove structure. The side wall of the tilting frame (702) is connected to a transmission column (707), which is movably arranged in the path groove; When the path groove is a horizontal annular groove structure, the drive assembly (82) can drive the transmission column (707) to make a circular path movement in the path groove, so that the milling cutter (705) can perform circumferential milling on the side wall of the flange to form the deformation groove (2); when the path groove is a lifting annular groove structure, the drive assembly (82) can drive the transmission column (707) to make a wave-like lifting annular path movement in the path groove, so that the milling cutter (705) can mill out multiple partition grooves (403) structures.

3. The flange nut forming equipment according to claim 2, characterized in that, The positioning base (5) has a nut groove (501) on its top, which is used to position the nut body (1). The clamping mechanism (6) includes a clamping head (601) driven by a cylinder, which is arranged above the nut groove (501); the clamping head (601) can press down on the washer surface (402) to clamp and fix the nut that has been positioned.

4. The flange nut forming equipment according to claim 2, characterized in that, The top of the tilting frame (702) is an inclined surface, and the tilt angle of the inclined surface is consistent with the cross-sectional tilt angle of the deformation groove (2). A moving unit (703) is installed on the inclined surface of the tilting frame (702). The moving unit (703) is a linear moving structure driven by a motor and a lead screw. The moving end of the moving unit (703) is connected to a milling frame (704). The milling cutter (705) is installed on the milling frame (704). The tilt angle of the milling cutter (705) is consistent with the tilt angle of the top inclined surface of the tilting frame (702).

5. The flange nut forming equipment according to claim 2, characterized in that, The end of the milling cutter (705) is rounded, which is used to form the arc-shaped structure of the inner end face of the deformation groove (2).

6. The flange nut forming equipment according to claim 2, characterized in that, The path adjustment component (81) consists of a path support component and a path deformation component; The path support assembly includes a support ring plate (8103), which is arranged concentrically with the annular ring plate (502). The bottom of the support ring plate (8103) is connected to the top of the positioning base (5) through multiple arc blocks (8104), and the top of the support ring plate (8103) is connected to a fixing ring plate (8106) through an annular cover (8105). Among them, the top of the support ring plate (8103) is also integrally formed with an annular convex plate (8107), and the annular convex plate (8107) is connected to a plurality of lower arc plates (8109) arranged in an annular array on the side near the positioning base (5), and a lower lifting groove (8110) is formed between each two lower arc plates (8109). The bottom of the fixed ring plate (8106) is integrally formed with multiple upper arc plates (8112) arranged in a ring array, and an upper lifting groove (8113) is formed between every two upper arc plates (8112). The lower lifting slide (8110) is aligned with the upper lifting slide (8113).

7. The flange nut forming equipment according to claim 6, characterized in that, The path deformation component includes a lower sliding plate (8114) that is slidably arranged in the lower lifting groove (8110) and an upper sliding plate (8115) that is slidably arranged in the upper lifting groove (8113). The sidewalls of the multiple lower sliding plates (8114) are connected by a lower annular sliding plate (8116), which is movably arranged in the inner cavity of the support ring plate (8103); the sidewalls of the multiple upper sliding plates (8115) are connected by an upper annular sliding plate (8117), which is movably arranged in the inner cavity of the fixed ring plate (8106); the lower annular sliding plate (8116) and the upper annular sliding plate (8117) are connected by multiple fixing brackets (8118), which are spaced apart on the outer side of the support ring plate (8103) and the fixed ring plate (8106).

8. The flange nut forming equipment according to claim 7, characterized in that, The gap between the lower arc plate (8109) and the upper arc plate (8112) forms the arc groove (8101), and the gap between the lower end slide plate (8114) and the upper end slide plate (8115) forms the lifting groove (8102). Wherein, the width of the lower sliding plate (8114) is smaller than the width of the upper sliding plate (8115); when the lower sliding plate (8114) is located at the lower limit position of the lower lifting slide (8110), the arc groove (8101) and the lifting slide (8102) are in a connected state, forming the horizontal annular groove structure; when the lower sliding plate (8114) slides upward into the upper lifting slide (8113), so that the upper sliding plate (8115) is located at the upper limit position of the upper lifting slide (8113), the gap between the side wall of the lower sliding plate (8114) and the side wall of the upper arc plate (8112) is used to connect the arc groove (8101) and the lifting slide (8102), forming the vertical section of the lifting annular groove structure; Multiple lifting cylinders (9) are installed on the outer wall of the positioning base (5), and the output end of the lifting cylinder (9) is connected to the side wall of the fixing frame (8118).

9. The flange nut forming equipment according to claim 8, characterized in that, The drive assembly (82) includes a lower drive ring (8201) and an upper drive ring (8202), wherein the upper drive ring (8202) is connected to the top of the lower drive ring (8201) to form an internal hollow structure; The lower drive ring frame (8201) is rotatably arranged between the annular convex plate (8107) and the annular cover (8105); the top of the lower drive ring frame (8201) is provided with a plurality of tooth-like structures, and the bottom of the upper drive ring frame (8202) is provided with a plurality of tooth-like structures with the same structure; the tooth-like structures of the lower drive ring frame (8201) and the tooth-like structures of the upper drive ring frame (8202) form a continuous undulating zigzag-shaped drive groove (8205). The transmission column (707) passes through the path groove and extends into the drive groove (8205); When the transmission column (707) is located in the arc groove (8101) of the path groove, the end of the transmission column (707) is located at the lower end of the drive groove (8205). The lower drive ring frame (8201) is also provided with a toothed mouth (8206) on its side wall. The annular cover (8105) is provided with a connecting groove (8119) on its side wall. The annular cover (8105) is also rotatably provided with a drive gear (8120) on its side wall. The drive gear (8120) is meshed with the toothed mouth (8206) through the connecting groove (8119). A rotary motor (8121) is installed on the top of the fixed ring plate (8106). The output end of the rotary motor (8121) is connected to the drive gear (8120).

10. A flange nut forming device according to claim 9, characterized in that, The lower sliding plate (8114) is also provided with a groove (8122) at the top. Multiple sliding rods (8123) are connected to the inner wall of the groove (8122). A wedge (8124) is slidably sleeved on the sliding rod (8123). The end of the sliding rod (8123) extends into the inner cavity of the wedge (8124) and is connected to a limiting plate (8125). A spring (8126) is also sleeved on the sliding rod (8123). One end of the spring (8126) is connected to the groove. (8122) The inner wall is connected, and the other end is connected to the side wall of the wedge (8124). The end of the wedge (8124) extends out of the groove (8122) and enters the vertical section of the lifting annular groove structure. The bottom of the wedge (8124) is an inclined surface structure. When the transmission column (707) moves from bottom to top in the vertical section of the lifting annular groove structure, it can squeeze the inclined surface structure of the wedge (8124) and enter the top of the wedge (8124). The bottom of the upper arc plate (8112) has the same structural shape as the groove (8122), and the groove (8122) of the upper arc plate (8112) has a structural component that is the same as the wedge (8124) but in the opposite direction. This component is used to press the inclined surface structure of the wedge (8124) and enter below the wedge (8124) when the transmission column (707) moves from top to bottom on the other vertical section of the lifting annular groove structure.

Images