Sock picking device for hosiery machine with axial pushing and radial telescoping

Abstract

The present application discloses a sock pickup device for hosiery machine with axial pushing and radial stretching, which comprises pickup needles for picking up sock loops in cooperation with knitting needles of the hosiery machine; the pickup needles are arranged in a ring shape in the needle slots of the needle disc to form a pickup needle ring; the pickup needle ring is subjected to an inclined first driving force in the axial direction through the bearing surface of the pickup needles, and the pickup needles of the pickup needle ring are driven to move along the needle slots from the needle disc axis to away from the needle disc axis; the pickup needle ring is subjected to a second driving force in the radial direction, and the second driving force drives the pickup needles of the pickup needle ring to move along the needle slots from away from the needle disc axis to close to the needle disc axis; and the first driving force is generated by the pressing ring. The present application drives the pickup needles with bearing surfaces to move radially by the inclined first driving force generated by the pressing ring, and realizes the radial reciprocating movement of the pickup needle ring in cooperation with the second driving force, so that all the pickup needles of the pickup needle ring are subjected to synchronous force to avoid pickup missing.

Description

Technical Field

[0001] This invention relates to the field of sock machine components technology, and in particular to a sock picking device for a sock machine that achieves radial extension by axial pressing. Background Technology

[0002] Currently, high-end fully computerized sock knitting machines have achieved fully automated functions such as sock knitting, transfer, and toe sewing. During the sock transfer process, the pick-up device installed on the transfer arm needs to transfer the sock from the needle cylinder to the pick-up device. The closest existing pick-up device is shown in patent ZL200980108857.2, which details the entire sock pick-up process. However, traditional pick-up devices have significant technical defects: they can only rely on radial internal and external forces to achieve the radial extension and retraction of the pick-up needles. This design concept necessitates the use of multiple radial pushing parts combined to form a ring drive structure. Since a complete circular pushing part cannot extend or retract, existing technologies typically use five radial pushing parts that rotate in coordination to achieve the movement of all pick-up needles. This multi-pushing-part structure produces significant uneven force distribution problems in actual operation, especially at the junction of two pushing parts, where the pick-up needle often cannot obtain sufficient driving force, resulting in unreliable hooking of the corresponding sock loop, thus causing missed needles and seriously affecting the quality of the finished socks. This technical defect has become a key bottleneck restricting the improvement of sock knitting machine production efficiency. Solving the problem of uneven force distribution caused by multiple push-fit components through innovative structural design is a technical challenge that urgently needs to be overcome in this field. Existing technologies urgently need improvement to address these issues. Summary of the Invention

[0003] The purpose of this application is to provide a sock picking device for a sock machine that achieves radial extension by axial pushing. A pressure ring is converted into axial downward pressure under the action of radial driving force. This pressure ring, together with all the picking needles that make up the picking needle ring, drives all the picking needles to complete the needle picking for the sock loop. It has the advantages of simple structure, uniform force distribution and effective prevention of needle leakage.

[0004] This application provides a sock-picking device for a sock knitting machine that achieves radial extension through axial pressing. It includes picking needles that cooperate with the knitting needles to pick up sock loops. The picking needles are arranged in a ring within the needle groove of the needle plate to form a picking needle ring. The picking needle ring is subjected to a first, inclined driving force in the axial direction through the bearing surfaces of the picking needles, driving the picking needles of the picking needle ring to move along the needle groove from near the needle plate axis to away from the needle plate axis. The picking needle ring is subjected to a second driving force in the radial direction, driving the picking needles of the picking needle ring to move along the needle groove from away from the needle plate axis to near the needle plate axis. The first driving force is generated by pressing down the pressure ring, which simultaneously engages with the bearing surfaces of all the picking needles forming the picking needle ring. This invention uses the first, inclined driving force generated by the pressing down of the pressure ring to drive the radial movement of the picking needles with bearing surfaces, combined with the second driving force, to achieve radial reciprocating motion of the picking needle ring. All the picking needles of the picking needle ring are simultaneously subjected to force to avoid picking up missed needles.

[0005] The pressure ring generates the first driving force through a rotating pressure application structure or a vertical pressure application structure;

[0006] The rotary pressure structure includes a pressure ring connected to a first pull rod. The first pull rod, driven by a first vertical guide hole, rotates and moves up and down around a guide ring along a first inclined guide hole. The first vertical guide hole is located in the ring wall of the pull ring. The pull ring is connected to a driving device, which drives the pull ring to rotate radially around the needle disk axis. The first inclined guide hole is located in the ring wall of the guide ring. The first pull rod passes through both the first vertical guide hole and the first inclined guide hole. As the pull ring rotates radially, the first inclined guide hole drives the first pull rod to rotate along the first inclined guide hole while moving up and down, thus causing the pressure ring to rotate and move up and down simultaneously.

[0007] The vertical pressure structure includes a pressure ring connected to a pull rod via a third connecting hole. The pull rod moves up and down along the axial guide hole under the drive of the inclined guide hole. The inclined guide hole is located on the ring wall of the pull ring. The pull ring is connected to a driving device, which drives the pull ring to rotate radially around the needle plate axis. The axial guide hole is located on the ring wall of the guide ring. The pull rod passes through both the axial guide hole and the inclined guide hole. As the pull ring rotates radially, the inclined guide hole drives the pull rod to move up and down along the axial guide hole, thereby causing the pressure ring to move axially up and down.

[0008] The pickup needle has a spring mounting groove on its side. The spring mounting grooves of all the pickup needles of the pickup needle ring are arranged to form a ring-shaped mounting groove to install a circular spring. The circular spring generates a second driving force relative to the pickup needle ring.

[0009] The pull ring has a protruding connecting ring on its side wall, and a connecting hole on its inner side. The connecting hole connects to a driving device. The driving device includes a connecting shaft connected to the connecting hole, a connecting shaft connected to a cylinder push rod, and a cylinder push rod connected to a cylinder mounted on a cylinder seat. The cylinder push rod moves back and forth to drive the pull ring to rotate.

[0010] The connecting ring is arranged parallel to the cylinder push rod vertically.

[0011] The guide ring has a first connecting hole axially provided in its ring wall. The first connecting hole is fixedly connected to the base by a screw. The base is connected to the transfer arm of the sock machine.

[0012] The guide ring has a second connecting hole axially provided in its ring wall. The second connecting hole is connected to an annular cover plate through a screw. An anti-tilting ring is pressed onto the side of the annular cover plate near the needle plate axis. The anti-tilting ring is pressed onto the pickup needle ring.

[0013] The needle groove has raised guide groove walls on both sides, which fit and connect to the bearing surface of the pickup needle.

[0014] The bearing surface of the pickup needle is an inclined structure, and the bearing surface is in contact with the inclined surface of the connecting pressure ring.

[0015] The needle plate is provided with a fourth connecting hole. The fourth connecting hole and the first connecting hole of the guide ring are connected to the base by the same screw. The base is located between the needle plate and the guide ring. The needle plate and the guide ring are coaxially arranged.

[0016] As can be seen from the above, the sock picking device for a sock machine that achieves radial extension by axial pressing provided in this application drives all picking needles in a unified manner by pressing down the pressure ring to generate axial driving force, and combined with the radial restoring force provided by the spring, forms a stable bidirectional motion control, which solves the problem of uneven force caused by the traditional multi-pressing component structure. It has the advantages of simple structure, high motion synchronization and effective prevention of needle leakage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural diagram of a sock-picking device for a sock machine that achieves radial extension by axial pushing with a rotating pressure structure, according to the present invention;

[0019] Figure 2 This invention provides a three-dimensional structural diagram of a sock-picking device for a sock machine that achieves radial extension through axial pushing with a vertical pressure structure.

[0020] Figure 3 This is a schematic diagram of the installation structure of the rotary pressure application structure in this invention;

[0021] Figure 4This is a schematic diagram of the three-dimensional mounting structure of the pressure ring in the vertical pressure application structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the three-dimensional mounting structure of the needle plate in this invention;

[0023] Figure 6 This is a schematic diagram of the three-dimensional mounting structure of the needle plate and the pickup needle in this invention;

[0024] Figure 7 This is a schematic diagram of the three-dimensional mounting structure of the pressure ring and guide ring in this invention;

[0025] Figure 8 This is a schematic diagram of the three-dimensional structure of the pressure ring in this invention;

[0026] Figure 9 This is a schematic diagram of the three-dimensional structure of the pickup needle in this invention;

[0027] Figure 10 This is a partial cross-sectional three-dimensional installation structure diagram of the pressure ring in this invention;

[0028] Figure 11 This is a schematic diagram of the partial pickup needle ring and spring mounting structure in this invention. Detailed Implementation

[0029] The following will refer to the appendix to this application. Figure 1-11 The technical solutions in this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In existing technologies, fully computerized sock knitting machines rely on multiple radial pushing components to drive the pickup needles in a telescopic motion during sock transfer. Because there are junction areas between these pushing components, the pickup needles in these areas cannot receive effective driving force, leading to missed needles when hooking the loops and ultimately affecting the quality of the finished socks. For example, in a traditional design using five radial pushing components, a driving force gap can easily form at the junction of adjacent pushing components, causing the pickup needles in these areas to malfunction.

[0031] To address the aforementioned issues, a drive structure is needed to avoid the defects caused by the overlap of multiple pressing components. Analysis of the limitations of traditional radial drive methods reveals that replacing multiple pressing components with a single annular drive component is a feasible approach. Further consideration is given to changing the drive direction from radial to axial, utilizing the component force generated by axial pressing to achieve radial extension and retraction, thereby ensuring that all pickup pins are subjected to synchronous force.

[0032] Therefore, this application proposes a sock picking device including a needle plate, needle grooves, a needle pickup ring, and a pressure ring. The needle pickup rings are arranged in a ring within the needle grooves of the needle plate. The pressure ring applies a first, inclined driving force to the bearing surface of the needle pickup through a downward pressing action, driving the needle pickup away from or towards the needle plate axis along the needle groove. Simultaneously, a ring spring applies a second driving force to the needle pickup, causing it to return to its original position. Specifically, a sock-picking device for a sock knitting machine that achieves radial extension by axial pressing is disclosed. It includes picking needles that cooperate with the knitting needles of the sock knitting machine to pick up sock loops. The picking needles 13 are arranged in a ring and installed in the needle groove 26 of the needle plate 22 to form a picking needle ring. The picking needle ring is subjected to a first driving force in the axial direction by the bearing surface 24 of the picking needles 13, which drives the picking needles of the picking needle ring to move along the needle groove 26 from near the needle plate axis 50 to away from the needle plate axis. The picking needle ring is subjected to a second driving force in the radial direction, which drives the picking needles of the picking needle ring to move along the needle groove 26 from away from the needle plate axis to near the needle plate axis 50. The first driving force is generated by pressing down the pressing ring 15, which also cooperates with the bearing surfaces 24 of all the picking needles 13 that constitute the picking needle ring.

[0033] The needle groove is a guide structure on the surface of the pointer dial designed to accommodate the pickup needles. It can be implemented using straight or curved channels, and raised guide walls can be provided on both sides of the groove to limit the movement trajectory of the pickup needles. The bearing surface refers to the inclined surface structure on the pickup needle that contacts the pressure ring. It can be implemented using a plane with an inclination angle of 15° to 75°, used to convert the axial downward pressure of the pressure ring into a radial component. The pressure ring is an annular component surrounding the axis of the pointer dial. It can be made of metal or engineering plastic. When pressed down, its inclined surface acts simultaneously on the bearing surfaces of all pickup needles, ensuring a uniform distribution of driving force.

[0034] Specifically, when the pressure ring moves downward under external drive, its inclined surface contacts the pickup needle's bearing surface, decomposing the axial pressure into a radial component, pushing the pickup needle outward along the needle groove to complete the extension action. When the pressure ring rises to release the pressure, the contraction force of the annular spring drives the pickup needle inward along the needle groove to reset. Because the pressure ring is a complete annular structure, all the bearing surfaces of the pickup needles are subjected to the same driving force in the same direction at the same time, avoiding the problem of discontinuous driving force in traditional multi-push-part solutions.

[0035] Compared to existing technologies, traditional solutions rely on multiple independent pressing components for segmented driving, resulting in blind spots in the driving force at the connection areas of adjacent pressing components. In contrast, this solution uses a single pressure ring to apply axial driving force, and converts the axial movement into radial extension and contraction through an inclined structure, ensuring that all pickup needles are subjected to force synchronously and continuously, thus completely eliminating the risk of needle leakage.

[0036] Through the above technical solution, this application solves the problem of uneven force on the pickup needles caused by the multi-push-pressure drive. The complete annular structure of the pressure ring ensures uninterrupted transmission of driving force, so that all pickup needles maintain synchronous movement during extension or retraction, effectively avoiding needle leakage in the junction area and significantly improving the success rate of sock transfer.

[0037] This application further proposes that the pressure ring generates a first driving force through a rotational pressure application structure or a vertical pressure application structure;

[0038] The rotary pressure structure includes a pressure ring 15 connected to a first pull rod 41. The first pull rod 41 rotates and moves up and down around a guide ring 14 along a first inclined guide hole 42 under the drive of a first vertical guide hole 40. The first vertical guide hole 40 is located on the ring wall of the pull ring 11. The pull ring 11 is connected to a driving device, which drives the pull ring 11 to rotate radially around the needle disk axis 50. The first inclined guide hole 42 is located on the ring wall of the guide ring 14. The first pull rod 41 passes through both the first vertical guide hole 40 and the first inclined guide hole 42. As the pull ring 11 rotates radially, the first inclined guide hole 42 drives the first pull rod 41 to rotate along the first inclined guide hole 42 while moving up and down, thus causing the pressure ring 15 to rotate and move up and down simultaneously.

[0039] The vertical pressure structure includes a pressure ring 15 connected to a pull rod 9 via a third connecting hole 61. The pull rod moves up and down along an axial guide hole 32 under the drive of an inclined guide hole 8. The inclined guide hole 8 is located on the ring wall of the pull ring 11. The pull ring 11 is connected to a driving device, which drives the pull ring 11 to rotate radially around the needle disk axis 50. The axial guide hole 32 is located on the ring wall of the guide ring 14. The pull rod passes through both the axial guide hole 32 and the inclined guide hole 8. As the pull ring 11 rotates radially, the inclined guide hole 8 drives the pull rod 9 to move up and down along the axial guide hole 32, thereby causing the pressure ring 15 to move up and down axially.

[0040] The first inclined guide hole refers to a non-vertical channel formed on the ring wall of the pull ring, whose axis forms an angle with the axis of the needle plate. Specifically, it can be achieved using a channel with an inclined angle, converting rotational motion into axial displacement. The first vertical guide hole and axial guide hole refer to guide structures perpendicular to the axis of the needle plate, constraining the pull rod to move only axially. The pull ring is a transmission component with a ring structure; its rotation causes the position of the inclined guide hole to change, causing the pull rod 9 to move up and down along the axial guide hole 32, thereby driving the pressure ring 15 to move up and down axially.

[0041] Specifically, the first driving force generated by the rotary pressure structure occurs when the driving device drives the pull ring to rotate around the needle disk axis, causing the first vertical guide hole fixed on the pull ring to change its spatial position. Since the first pull rod passes through both the first vertical guide hole and the first inclined guide hole simultaneously, the change in position of the first vertical guide hole forces the first pull rod to rotate while simultaneously displacing axially under the constraint of the first inclined guide hole. This force of rotation and axial displacement is transmitted to the pressure ring through the first pull rod, causing the pressure ring to produce a precise trajectory of rotation and axial movement. The rotation and axial movement of the pressure ring directly acts on the bearing surface of the ring-arranged pickup needles, forming a uniform rotary driving force that drives all pickup needles to synchronously perform radial extension and retraction movements. Furthermore, the contact position between the pressure ring and the pickup needles continuously changes, meaning that the pressure ring contacts different pickup needles at the same position, avoiding technical malfunctions such as wear and jamming caused by repeated contact at the same position.

[0042] Compared to existing technologies, traditional solutions require multiple radial pressing components to work alternately, which can easily create blind spots in the driving force at the junction areas. This solution uses a single rotary drive source combined with an inclined channel structure to transform the rotary motion into simultaneous rotation and axial movement, allowing the pressure ring to act on all pickup needles simultaneously. This design eliminates the force gaps at the junctions of multiple pressing components, avoiding needle leakage caused by localized lack of driving force.

[0043] Through the above technical solution, this application achieves synchronous axial drive of the ring-shaped pickup needles, ensuring that each pickup needle receives a uniform driving force during radial extension and retraction. This structure effectively solves the problem of needle leakage in the junction area caused by traditional multi-push-part drive methods, improves the reliability of the sock transfer process, and reduces the probability of defective products.

[0044] Specifically, the first driving force generated by the vertical pressure structure occurs when the driving device drives the pull ring to rotate around the needle disk axis, causing the inclined guide hole fixed on the pull ring to change its spatial position. Since the pull rod passes through both the inclined guide hole and the axial guide hole simultaneously, the change in the position of the inclined guide hole forces the pull rod to undergo axial displacement under the constraint of the axial guide hole. This axial displacement is transmitted to the pressure ring through the third connecting hole, causing the pressure ring to generate a precise axial movement trajectory. The axial movement of the pressure ring directly acts on the bearing surface of the ring-shaped pickup needles, forming a uniform axial driving force that drives all pickup needles to synchronously perform radial extension and retraction movements.

[0045] Compared to existing technologies, traditional solutions require multiple radial pressing components to work alternately, which can easily create blind spots in the driving force at the junction areas. This solution uses a single rotary drive source combined with an inclined channel structure to convert rotational motion into axial linear motion, allowing the pressure ring to act on all pickup needles simultaneously. This design eliminates the force gaps at the junctions of multiple pressing components, avoiding needle leakage caused by localized lack of driving force.

[0046] Through the above technical solution, this application achieves synchronous axial drive of the ring-shaped pickup needles, ensuring that each pickup needle receives a uniform driving force during radial extension and retraction. This structure effectively solves the problem of needle leakage in the junction area caused by traditional multi-push-part drive methods, improves the reliability of the sock transfer process, and reduces the probability of defective products.

[0047] This application further proposes that the pickup needle 13 has a spring mounting groove 31 on its side, and the spring mounting grooves 31 of all the pickup needles 13 of the pickup needle ring are arranged to form an annular mounting groove to mount an annular spring 28. The annular spring 28 generates a second driving force relative to the pickup needle ring.

[0048] The spring mounting groove refers to a recessed structure located on the side of the pickup needle to accommodate the spring. It can be implemented using a U-shaped or rectangular cross-section groove, and the arrangement of the spring mounting grooves is consistent with the circumferential direction of the pickup needle ring. The annular spring refers to an elastic element with a closed-loop structure, such as a metal spring or an elastic rubber ring. It is installed within the annular mounting groove formed by all the spring mounting grooves, applying a radially inward force to the pickup needle through elastic deformation.

[0049] Specifically, the spring mounting slots are continuously arranged along the side of the pickup needles to form an annular groove. The annular springs are embedded in this groove. When the pickup needles move outward due to the first driving force, the springs are stretched and accumulate elastic potential energy. When the first driving force is released, the springs drive all the pickup needles to retract synchronously towards the axis of the needle plate through elastic restoring force. Because the springs are a continuous annular structure, the radial force applied to each pickup needle is evenly distributed, avoiding the problem of uneven local force.

[0050] Compared with existing technologies, traditional solutions rely on multiple independent pressing components to drive the pickup needles in segments, resulting in the pickup needles in the connection area between adjacent pressing components not being able to effectively bear force. In contrast, this solution achieves overall synchronous driving through a single ring spring, eliminating the force blind spot in the connection area.

[0051] Through the above technical solution, this application solves the problem of uneven force on the pickup needles caused by segmented driving, ensuring that all pickup needles are subjected to consistent force during the retraction process, thereby avoiding needle leakage and improving the reliability of sock transfer and product qualification rate.

[0052] As a preferred structural feature, the pull ring 11 has a protruding connecting ring 17 on the side of its ring wall. The inner side of the connecting ring 17 has a connecting hole 16, which is connected to a driving device. The driving device includes a connecting shaft 6 connected to the connecting hole 16, a cylinder push rod 7 connected to the connecting shaft 6, and a cylinder 4 installed on the cylinder seat 3. The cylinder push rod 7 moves back and forth to drive the pull ring 11 to rotate.

[0053] The connecting ring is an annular structure extending outward from the side wall of the pull ring, which can be integrally formed from metal material. It converts the linear motion of the drive device into the rotational motion of the pull ring. The connecting hole is a through hole penetrating the inner side of the connecting ring, which can be a cylindrical hole structure. It is used to install the connecting shaft for power transmission. The cylinder push rod is a rigid rod connected to the cylinder piston rod. The extension and retraction of the cylinder drives the connecting shaft to move in a linear direction. The cylinder seat is a supporting structure that fixes the cylinder. It can be bolted to the sock machine frame to maintain the stability of the cylinder during operation.

[0054] Specifically, when the cylinder drives the cylinder push rod to move back and forth linearly, the connecting shaft drives the connecting ring to move synchronously through the connecting hole. Since the connecting ring is fixedly connected to the pull ring, the linear motion of the connecting shaft forces the pull ring to rotate around the needle disk axis. During the rotation of the pull ring, the inclined guide hole on its ring wall drives the pull rod to move up and down along the axial guide hole, thereby controlling the axial pushing force of the pressure ring on the pickup needle. This structure achieves rotation control of the pull ring through a single drive source, avoiding the problem of discontinuous power transmission caused by the alternating action of multiple pushing components in traditional designs.

[0055] This application further proposes that the connecting ring 17 and the cylinder push rod 7 be arranged vertically in parallel. Compared with the prior art, in traditional drive devices, the connecting ring and the cylinder push rod are often not parallel or have angular deviations, which complicates the driving force transmission path, easily generates lateral force components, and aggravates component wear, thereby affecting the synchronization and stability of the pickup needle ring. This solution simplifies the power transmission structure by arranging them vertically in parallel, reduces assembly accuracy requirements, and reduces energy loss during movement.

[0056] Through the above technical solution, this application can ensure that the linear driving force of the cylinder push rod is efficiently converted into the rotational motion of the pull ring, avoiding the problem of uneven force on the pickup needle ring caused by the instability of the transmission structure, thereby ensuring that all pickup needles move synchronously during the radial extension and retraction process, and effectively preventing the phenomenon of needle leakage.

[0057] The guide ring 14, as a preferred structural component, has a first connecting hole 18 axially provided in its ring wall. The first connecting hole 18 is fixedly connected to the base 10 by a screw. The base 10 is connected to the transfer arm 1 of the sock machine. The guide ring 14 also has a second connecting hole 19 axially provided in its ring wall. The second connecting hole 19 is connected to an annular cover plate 5 by a screw. An anti-warping ring 21 is pressed onto the side of the annular cover plate 5 near the needle plate axis 50. The anti-warping ring 21 is pressed onto the needle pickup ring.

[0058] The second connecting hole is a threaded hole arranged axially along the guide ring, used to fix the annular cover plate to the guide ring via a screw. The annular cover plate is an annular plate-shaped component covering the guide ring, which can be formed by machining sheet metal, and is used to apply pressure to the anti-tilting ring. The anti-tilting ring is an annular component located between the annular cover plate and the pickup needle ring, used to prevent the pickup needle ring from tilting due to tilting forces during movement.

[0059] Specifically, the second connecting hole of the guide ring is rigidly connected to the annular cover plate via a screw. The annular cover plate directly contacts the anti-tilting ring on the side closest to the needle disc axis, and the anti-tilting ring covers the surface of the pickup needle ring. When the pressure ring presses down to drive the pickup needle to move radially, the anti-tilting ring evenly transmits pressure, preventing the pickup needle from shifting or tilting due to tilting forces. At the same time, the fixed connection between the annular cover plate and the guide ring forms a stable support structure, preventing the pickup needle ring from vibrating or displacing during high-speed movement.

[0060] Compared to existing technologies, traditional pickup devices rely on multiple independent pressing components to drive the pickup needle, leading to stress failure in the junction area. This solution uses a combination structure of an anti-tilting ring and annular cover plate, with a single annular component covering the entire pickup needle ring, eliminating the gap problem caused by the cooperation of multiple pressing components. In addition, the screw connection between the annular cover plate and the guide ring simplifies the assembly process and avoids the cumulative errors caused by traditional multi-component assembly.

[0061] This application further proposes that the groove walls on both sides of the needle groove 26 are provided with raised guide groove walls 25, and the guide groove walls 25 fit and connect to the bearing surface 24 of the pickup needle 13.

[0062] The guide groove wall is a raised structure formed on both sides of the pointer groove. It can be made of metal material and is used to limit the movement trajectory of the pickup needle in the needle groove.

[0063] Specifically, the guide groove walls on both sides of the needle groove form a limiting effect on the pickup needle through a raised structure. When the pressure ring applies axial downward pressure, the bearing surface of the pickup needle slides along the guide groove wall, causing the pickup needle to move radially along a preset path within the needle groove. Compared with existing technologies, the guide height of traditional pickup needle grooves is relatively low, which makes the pickup needle prone to deviation or jamming during movement. This solution, through the raised limiting design of the guide groove wall, makes the extension and retraction movement of the pickup needle more stable and avoids deviation in movement trajectory caused by uneven force.

[0064] This application further proposes that the bearing surface 24 of the pickup needle 13 is an inclined structure, and the bearing surface 24 is in contact with the inclined surface 30 of the connecting pressure ring 15.

[0065] The inclined surface structure refers to a non-horizontal plane where the contact area between the bearing surface and the pressure ring is not horizontal. The inclined surface fit connection means that the pressure ring and the bearing surface form a surface contact fit relationship. Specifically, CNC grinding can be used to ensure that the inclination angles of the two are consistent, and surface polishing can be used to reduce frictional resistance.

[0066] Specifically, when the pressure ring moves axially downwards, its inclined surface contacts the inclined bearing surface of the pickup needle. The axial pressure is decomposed into a normal force perpendicular to the bearing surface and a tangential force parallel to the bearing surface. The normal force ensures a tight fit between the pressure ring and the bearing surface, while the tangential force pushes the pickup needle to slide outwards along the needle groove, achieving radial expansion. During the reset process, the second driving force generated by the spring acts on the pickup needle, causing its bearing surface to slide in the opposite direction along the inclined surface of the pressure ring, leading to radial contraction of the pickup needle. The inclined structure creates a linear relationship between axial and radial movements, avoiding the jamming phenomenon caused by traditional planar contact.

[0067] Through the above technical solution, this application makes the driving force distribution of the pressure ring on the pickup needle more uniform, avoids the problem of needle leakage caused by local lack of force, simplifies the complexity of the driving mechanism, and improves the synchronization and stability of the pickup action.

[0068] This application further proposes that the needle plate 22 is provided with a fourth connecting hole 27, and the fourth connecting hole 27 and the first connecting hole 18 of the guide ring 14 are connected to the base 10 by the same screw. The base 10 is located between the needle plate 22 and the guide ring 14, and the needle plate 22 and the guide ring 14 are coaxially arranged.

[0069] The fourth connecting hole is a positioning hole on the dial used to connect with the guide ring. It can be implemented using evenly distributed circular through holes, the diameter of which matches the diameter of the screw to achieve a tight connection. The first connecting hole is a fixing hole axially set in the guide ring. It can be a threaded hole structure, forming a rigid connection with the fourth connecting hole through the screw.

[0070] Specifically, after the needle plate aligns with the first connecting hole of the guide ring through the fourth connecting hole, it is secured to the base by the same screw, forming a rigid whole with the needle plate, guide ring, and base. The base, as an intermediate support component, bears the assembly load of the needle plate and guide ring and connects to the main body of the sock machine via a transfer arm. Due to the coaxial arrangement of the needle plate and guide ring, their movement trajectories remain consistent during axial pressing or radial extension, avoiding jamming or frictional wear caused by axial misalignment.

[0071] Through the above technical solution, this application solves the problem of axis misalignment caused by traditional multi-component installation, so that the needle plate and guide ring always maintain a coaxial state during the movement, avoiding interference or uneven force on the needle picking movement caused by misalignment, thereby reducing the probability of missing needles and improving the success rate of sock transfer.

[0072] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sock picking device for a sock knitting machine that achieves radial extension by axial pressing, comprising a picking needle that cooperates with the knitting needle of the sock knitting machine to pick up sock loops, characterized in that: The pickup needles (13) are arranged in a ring and installed in the needle groove (26) of the needle plate (22) to form a pickup needle ring. The pickup needle ring is subjected to a first driving force in the axial direction through the bearing surface (24) of the pickup needles (13), which drives the pickup needles of the pickup needle ring to move along the needle groove (26) from near the needle plate axis (50) to away from the needle plate axis. The pickup needle ring is subjected to a second driving force in the radial direction, which drives the pickup needles of the pickup needle ring to move along the needle groove (26) from away from the needle plate axis to near the needle plate axis (50). The first driving force is generated by pressing down the pressure ring (15), which at the same time cooperates with the bearing surface (24) of all the pickup needles (13) that constitute the pickup needle ring. The pressure ring (15) generates a first driving force through a rotating pressure structure or a vertical pressure structure; The rotating pressure structure includes a pressure ring (15) connected to a first pull rod (41). The first pull rod (41) rotates up and down around the guide ring (14) along the first inclined guide hole (42) under the drive of the first vertical guide hole (40). The first vertical guide hole (40) is located on the ring wall of the pull ring (11). The pull ring (11) is connected to a driving device. The driving device drives the pull ring (11) to rotate radially around the needle plate axis (50). The first inclined guide hole (42) is located on the ring wall of the guide ring (14). The first pull rod (41) passes through both the first vertical guide hole (40) and the first inclined guide hole (42). As the pull ring (11) rotates radially, the first inclined guide hole (42) drives the first pull rod (41) to rotate along the first inclined guide hole (42) while moving up and down, thus causing the pressure ring (15) to rotate while moving up and down. The vertical pressure structure includes a pressure ring (15) connected to a pull rod (9) through a third connecting hole (61). The pull rod moves up and down along the axial guide hole (32) under the drive of the inclined guide hole (8). The inclined guide hole (8) is located on the ring wall of the pull ring (11). The pull ring (11) is connected to a driving device. The driving device drives the pull ring (11) to rotate radially around the needle plate axis (50). The axial guide hole (32) is located on the ring wall of the guide ring (14). The pull rod passes through both the axial guide hole (32) and the inclined guide hole (8). The inclined guide hole (8) drives the pull rod (9) to move up and down along the axial guide hole (32) as the pull ring (11) rotates radially, thereby causing the pressure ring (15) to move vertically up and down axially. The bearing surface (24) of the pickup needle (13) is a sloping structure, and the bearing surface (24) fits against the inclined surface (30) of the connecting pressure ring (15).

2. The sock picking device for a sock machine that achieves radial extension by axial pressing according to claim 1, characterized in that: The pickup needle (13) is provided with a spring mounting groove (31) on its side. The spring mounting grooves (31) of all the pickup needles (13) of the pickup needle ring are arranged to form an annular mounting groove to install an annular spring (28). The annular spring (28) generates a second driving force relative to the pickup needle ring.

3. The sock picking device for a sock machine that achieves radial extension by axial pressing according to claim 1, characterized in that: The pull ring (11) has a protruding connecting ring (17) on the side of the ring wall. The inner side of the connecting ring (17) has a connecting hole (16). The connecting hole (16) is connected to the driving device. The driving device includes a connecting shaft (6) connected to the connecting hole (16). The connecting shaft (6) is connected to the cylinder push rod (7). The cylinder push rod (7) is connected to the cylinder (4) installed on the cylinder seat (3). The cylinder push rod (7) moves back and forth to drive the pull ring (11) to rotate.

4. The sock picking device for a sock machine that achieves radial extension by axial pressing according to claim 3, characterized in that: The connecting ring (17) is arranged parallel to the cylinder push rod (7) vertically.

5. A sock-picking device for a sock machine that achieves radial extension by axial pressing according to claim 1, characterized in that: The guide ring (14) has a first connecting hole (18) axially provided on its ring wall. The first connecting hole (18) is fixedly connected to the base (10) by a screw. The base (10) is connected to the transfer arm (1) installed on the sock machine.

6. A sock-picking device for a sock machine that achieves radial extension by axial pressing according to claim 5, characterized in that: The guide ring (14) has a second connecting hole (19) axially provided on its ring wall. The second connecting hole (19) is connected to the annular cover plate (5) by a screw. The annular cover plate (5) is pressed into the anti-tilting ring (21) on the side near the needle plate axis (50). The anti-tilting ring (21) is pressed into the pickup needle ring.

7. The sock picking device for a sock machine that achieves radial extension by axial pressing according to claim 1, characterized in that: The needle groove (26) has raised guide groove walls (25) on both sides, and the guide groove walls (25) fit and connect to the bearing surface (24) of the pickup needle (13).

8. A sock-picking device for a sock machine that achieves radial extension by axial pressing according to claim 1, characterized in that: The needle plate (22) is provided with a fourth connecting hole (27). The fourth connecting hole (27) and the first connecting hole (18) of the guide ring (14) are connected to the base (10) by the same screw. The base (10) is located between the needle plate (22) and the guide ring (14). The needle plate (22) and the guide ring (14) are coaxially arranged.

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