A non-spring return hosiery machine sock pickup device

Abstract

The application discloses a non-spring-reset sock pickup device for a hosiery machine, which comprises pickup needles arranged in a ring shape in needle slots of a needle disc to form a pickup needle ring and used for picking up sock loops of knitting needles of the hosiery machine, wherein the pickup needles comprise first bearing surfaces and second bearing surfaces arranged in opposite directions, the pickup needle ring is subjected to a first driving force in an axial direction through the first bearing surfaces of the pickup needles, the second bearing surfaces of the pickup needles are subjected to a second driving force in the axial direction, the first driving force drives the pickup needles of the pickup needle ring to move along the needle slots from an area close to an axis of the needle disc to an area far away from the axis of the needle disc, and the second driving force drives the pickup needles of the pickup needle ring to move along the needle slots from the area far away from the axis of the needle disc to the area close to the axis of the needle disc. The first bearing surfaces arranged in opposite directions cooperate with the first driving force, and the second bearing surfaces cooperate with the second driving force, so that the movement track of the spring-reset pickup needles is improved, and the reliability of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of sock machine components technology, and in particular to a non-spring-return sock picking device for sock machines. 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 pressing parts combined to form a ring drive structure. Since a complete circular pressing part cannot extend or retract, existing technologies typically use five radial pressing parts that rotate in coordination to achieve the movement of all pick-up needles. This multi-pressing part structure produces obvious uneven force distribution problems in actual operation, especially at the junction of two pressing parts, where the pick-up needle often cannot obtain sufficient driving force, resulting in unreliable hooking of the sock loop at the corresponding position, thus causing missed needles and seriously affecting the quality of the finished socks. Furthermore, existing technologies all employ ring springs for needle reset. However, due to the limited lifespan and susceptibility to deformation of these springs, sock picking malfunctions are common. These technical shortcomings have become a key bottleneck restricting the improvement of sock machine production efficiency. How to solve the problem of uneven force distribution caused by multiple pushing components and spring drives 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 non-spring-reset sock picking device for a sock machine. By using a first bearing surface of the picking needle arranged in the opposite direction of the tilt to cooperate with a first driving force, and a second bearing surface to cooperate with a second driving force, the picking needle can achieve radial reciprocating motion under the drive of axial force, thus avoiding the picking needle movement trajectory of spring reset, improving the reliability of the device, and having the advantages of simple structure, uniform force distribution and effective prevention of needle leakage.

[0004] This application provides a non-spring-return sock picking device for a sock knitting machine, including picking needles that cooperate with the knitting needles of the sock knitting machine to pick up sock loops. The picking needles are arranged in a ring and installed in the needle groove of the needle plate to form a picking needle ring. The picking needles are characterized in that: the picking needles include a first bearing surface and a second bearing surface that are inclined in opposite directions; the picking needle ring is subjected to a first driving force through the first bearing surface of the picking needles; the second bearing surface of the picking needles is subjected to a second driving force; the first driving force drives 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 second driving force drives 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.

[0005] The first driving force is generated by pressing down the first pressure ring, which simultaneously cooperates with the first bearing surface of all the pickup needles forming the pickup needle ring; the second driving force is generated by pressing down the second pressure ring, which simultaneously cooperates with the second bearing surface of all the pickup needles forming the pickup needle ring; the first pressure ring moves downward while the second pressure ring moves upward; the first pressure ring moves upward while the second pressure ring moves downward.

[0006] The first pressure ring is connected to the first pull rod through the first connecting hole. The first pull rod moves up and down along the first axial guide hole under the drive of the first inclined guide hole. The second pressure ring is connected to the second pull rod through the second connecting hole. The second pull rod moves up and down along the second axial guide hole under the drive of the second inclined guide hole. The first inclined guide hole and the second inclined guide hole are both provided on the ring wall of the pull ring. The pull ring is connected to the driving device, and the driving device drives the pull ring to rotate radially around the axis of the needle plate.

[0007] Both the first axial guide hole and the second axial guide hole are located on the ring wall of the guide ring. The first pull rod passes through both the first axial 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 move up and down along the first axial guide hole, thereby causing the first pressure ring to move up and down axially. The second pull rod passes through both the second axial guide hole and the second inclined guide hole. As the pull ring rotates radially, the second inclined guide hole drives the second pull rod to move up and down along the second axial guide hole, thereby causing the second pressure ring to move up and down axially.

[0008] 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.

[0009] The guide ring has a third connecting hole axially provided on its ring wall. The third connecting hole is fixedly connected to the base by a screw. The base is connected to the transfer arm of the sock machine.

[0010] The guide ring has a fourth connecting hole in the axial direction. The fourth connecting hole is connected to the annular cover plate through a screw. The annular cover plate is pressed into the anti-tilting ring on the side near the needle plate axis. The anti-tilting ring is pressed into the pickup needle ring.

[0011] The needle groove has raised guide groove walls on both sides, which fit and connect the first and second bearing surfaces of the picking needle.

[0012] The first bearing surface of the pickup needle is a beveled structure, and the first bearing surface is attached to the beveled surface of the first pressure ring; the second bearing surface of the pickup needle is a beveled structure, and the second bearing surface is attached to the beveled surface of the second pressure ring.

[0013] The first pressure ring and the second pressure ring are coaxially arranged, with the first pressure ring located outside the second pressure ring. The first pressure ring has a hole in its ring wall for the second pull rod to pass through.

[0014] As can be seen from the above, the sock picking device for a sock machine that does not use spring reset provided in this application replaces the traditional spring reset mechanism with a bidirectional independently driven pressure ring structure, which solves the technical problem of uneven force distribution on multiple push-pressing components. It has the advantages of improving the uniformity and reliability of the driving force of the picking needle and extending the service life of the device. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a three-dimensional structural diagram of a non-spring-reset sock-picking device for a sock-making machine according to the present invention;

[0017] Figure 2 This is a schematic diagram of the three-dimensional mounting structure of the first and second pressure rings in this invention;

[0018] Figure 3 This is a schematic diagram of the three-dimensional mounting structure of the needle plate in this invention;

[0019] Figure 4 This is a schematic diagram of a partial three-dimensional mounting structure of the first and second pressure rings in this invention;

[0020] Figure 5 This is a schematic diagram of a partial three-dimensional mounting structure of the first and second pressure rings from another angle in this invention;

[0021] Figure 6 This is a schematic diagram of the mounting structure of the needle disc and the pickup needle in this invention;

[0022] Figure 7 This is a schematic diagram of the three-dimensional structure of the pickup needle in this invention;

[0023] Figure 8 This is a schematic diagram of the three-dimensional structure of the first compression ring in this invention;

[0024] Figure 9 This is a schematic diagram of the three-dimensional structure of the guide ring in this invention;

[0025] Figure 10 This is a schematic diagram of the three-dimensional structure of the second pressure ring in this invention. Detailed Implementation

[0026] The following will refer to the appendix to this application. Figure 1-10 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 this 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.

[0027] While high-end fully computerized sock knitting machines have achieved full automation in sock production, significant shortcomings remain in the transfer process. Traditional pick-up devices rely on a combination of multiple radial pushing components to drive the needle movement. Due to the attenuation of driving force at the junction of the pushing components, the needle experiences uneven force, often resulting in needle leakage. Furthermore, the ring spring reset mechanism is prone to spring deformation and failure, affecting the stability of the equipment's operation.

[0028] To address the aforementioned problems, this application proposes a non-spring-return sock-picking device for a sock knitting machine, comprising picking up sock loops in conjunction with the knitting needles of the sock knitting machine. The picking needles 25 are arranged in a ring and installed within the needle groove 3 of the needle plate 23 to form a picking needle ring. The picking needle 25 is characterized by having an inclined first bearing surface 27 and a second bearing surface 26, with the inclination directions of the first bearing surface 27 and the second bearing surface 26 being opposite. The picking needle ring receives a first driving force through the first bearing surface 27 of the picking needle; the second bearing surface 26 of the picking needle receives a second driving force. The first driving force drives the picking needle of the picking needle ring to move along the needle groove 3 from near the needle plate axis 50 to away from the needle plate axis 50, and the second driving force drives the picking needle of the picking needle ring to move along the needle groove from away from the needle plate axis 50 to near the needle plate axis. The picking needle 25 has an inverted first bearing surface and a second bearing surface. The first driving force drives the pickup needle to move outward through the first bearing surface, and the second driving force drives the pickup needle to reset inward through the second bearing surface, forming a bidirectional mechanical driving mechanism.

[0029] The first bearing surface refers to an inclined working surface on the pickup needle at a specific angle, which can be achieved using a 20-70 degree inclined plane structure. This angle design effectively converts axial pressure into radial displacement. The second bearing surface is an inclined surface arranged in the opposite direction to the first bearing surface. Specifically, it can be an inclined plane with the same angle but opposite direction, used to receive the reverse driving force. The guide groove walls on both sides of the needle groove ensure that the pickup needle moves along a predetermined trajectory. The first driving force and the second driving force are generated by independent driving sources, specifically through pressure applied by an axially moving pressure ring.

[0030] Specifically, when a sock needs to be picked up, the first pressure ring presses down on the first bearing surface of all the pickup needles, converting axial pressure into radial expansion force, causing the pickup needles to move outward synchronously to hook the coil. After the transfer is completed, the second pressure ring presses down on the second bearing surface, driving the pickup needles to reset inward along the needle groove, waiting for the next needle to be inserted into the needle cylinder, thus completing the sock coil transfer. The sock with the coil transferred is then pressed down by the first pressure ring on the first bearing surface of all the pickup needles, converting axial pressure into radial expansion force, causing the pickup needles to move outward synchronously to hook the coil repeatedly. During the alternating movement of the first and second pressure rings, the guide groove wall continuously constrains the movement trajectory of the pickup needles, preventing deviation and jamming. This process relies entirely on mechanical transmission and does not require spring-assisted reset.

[0031] Compared to existing technologies, traditional solutions rely on a combination of five pressing components for driving, while this solution achieves full-circumferential synchronous driving using a single pressure ring assembly, eliminating the driving force blind spot at the junction of the pressing components. Existing technologies using spring reset are prone to elastic failure; this solution achieves rigid reset through reverse pressure ring driving, significantly improving the reliability of the mechanism. Traditional pressing components require radial pressure, leading to structural complexity; this solution's axial drive mode simplifies the force transmission path.

[0032] Through the above technical solution, this application effectively solves the problem of uneven force caused by multi-push-part drive, ensuring that all pickup needles receive a uniform driving force and completely eliminating needle leakage. The mechanical bidirectional drive mechanism replaces the spring reset, avoiding malfunctions caused by aging and deformation of elastic elements and improving equipment operational stability. The axial pressure drive method simplifies the transmission structure, reduces assembly precision requirements, and is beneficial for large-scale production applications.

[0033] This application further proposes that the first driving force is generated by pressing down the first pressure ring 18, which simultaneously cooperates with the first bearing surface 27 of all pickup needles 25 constituting the pickup needle ring; the second driving force is generated by pressing down the second pressure ring 17, which simultaneously cooperates with the second bearing surface 26 of all pickup needles 25 constituting the pickup needle ring; the first pressure ring 18 moves downward while the second pressure ring 17 moves upward; the first pressure ring 18 moves upward while the second pressure ring 17 moves downward.

[0034] The first pressure ring is an annular component that applies downward pressure to the first bearing surface of all pickup needles. It can be implemented using a metal ring structure, with its outer surface in contact with the first bearing surface of the pickup needles, transmitting driving force through axial movement. The second pressure ring is an annular component that applies downward pressure to the second bearing surface of all pickup needles. It can be implemented using a metal ring structure coaxially nested with the first pressure ring, with its inner surface in contact with the second bearing surface of the pickup needles, transmitting driving force through reverse axial movement. The alternating movement of the first and second pressure rings means that their axial trajectories are opposite. This can be achieved through a linkage mechanism; for example, when the first pressure ring is pushed downwards, the second pressure ring is pulled upwards, thus forming a synergistic effect of bidirectional driving the pickup needles.

[0035] Specifically, the first pressure ring covers the entire pickup needle ring and maintains contact with the first bearing surface of all pickup needles. When the first pressure ring is driven downwards, its outer surface slope presses against the first bearing surface, pushing the pickup needles to slide outwards along the needle groove. Simultaneously, the second pressure ring moves upwards under a linkage. When the pickup needles need to reset, the first pressure ring moves upwards to release the pressure on the first bearing surface, and the second pressure ring moves downwards synchronously, its inner surface slope pressing against the second bearing surface, driving the pickup needles to slide inwards along the needle groove. Through the alternating movement of the two pressure rings, the radial extension and retraction of all pickup needles is synchronously controlled, eliminating the need for spring control.

[0036] Compared to existing technologies, traditional solutions use multiple segmented push-fit components to rotate and drive the pickup needles, resulting in insufficient force at the junctions of the push-fit components. This solution, however, uses an integral pressure ring to synchronously drive all pickup needles, eliminating the problem of localized lack of driving force. Furthermore, existing technologies rely on spring return, which is prone to fatigue failure. This solution achieves bidirectional mechanical drive through counter-moving dual pressure rings, improving structural reliability.

[0037] Through the above technical solution, this application solves the problem of uneven force distribution caused by multiple push-pressure components, avoids needle leakage due to insufficient local driving force, and extends the service life of the device by replacing spring reset with mechanical linkage. The synchronous reverse movement of the dual pressure rings ensures the precise coordinated action of all pick-up needles, improving the stability of the sock transfer process.

[0038] This application further proposes that the first pressure ring 18 is connected to the first pull rod 9 through the first connecting hole 51, and the first pull rod 9 moves up and down along the first axial guide hole 36 under the drive of the first inclined guide hole 10; the second pressure ring 17 is connected to the second pull rod 6 through the second connecting hole 52, and the second pull rod 6 moves up and down along the second axial guide hole 35 under the drive of the second inclined guide hole 8; the first inclined guide hole 10 and the second inclined guide hole 8 are both provided on the ring wall of the pull ring 5, and the pull ring 5 is connected to a driving device, which drives the pull ring 5 to rotate radially around the needle plate axis 50.

[0039] The first inclined guide hole refers to an oblique through groove formed on the ring wall of the pull ring, which can be implemented using a spiral or straight oblique groove structure, used to convert the rotational motion of the pull ring into the axial displacement of the pull rod. The first axial guide hole refers to a vertical through hole set on the guide ring, which can be implemented using a cylindrical channel structure, used to constrain the pull rod to move only axially. The pull ring refers to a transmission component with a ring structure. The drive device refers to a power output mechanism, which can be implemented by using a cylinder to drive the connecting shaft, driving the pull ring to rotate through the linear motion of the cylinder push rod.

[0040] Specifically, when the drive device drives the pull ring to rotate around the needle disc axis, the first and second inclined guide holes fixed on the pull ring generate relative motion with the first and second pull rods, respectively. Since the first pull rod passes through both the first axial guide hole and the first inclined guide hole, during the rotation of the pull ring, the inclined groove wall of the first inclined guide hole pushes the first pull rod to move up and down vertically along the first axial guide hole, thereby causing the first pressure ring to rise and fall synchronously. Similarly, the second pull rod moves along the second axial guide hole under the action of the second inclined guide hole, driving the second pressure ring to perform a reverse rising and falling motion. This structure synchronously controls the movement of the two sets of pressure rings through a single rotary drive source, enabling all pickup needles to achieve synchronous radial displacement within the needle groove.

[0041] This solution converts a single rotary input into the axial movement of two sets of pressure rings by setting a rotating pull ring with an inclined guide hole, thus achieving synchronous drive of all pickup needles. This not only eliminates the force blind spot in the multi-push-part structure, but also completely replaces the traditional spring-driven mechanism through the cooperation of the axial guide hole and the inclined guide hole.

[0042] Through the above technical solution, this application achieves uniform transmission of the driving force of the pickup needle, solving the problem of needle leakage caused by insufficient driving force at the junction of multiple pressing parts. At the same time, the mechanical matching structure of the axial guide hole and the inclined guide hole ensures that the reciprocating motion of the pickup needle is completely controlled by rigid components, avoiding the defect of easy deformation and failure of the spring reset mechanism, and significantly improving the operational reliability of the device.

[0043] As a preferred structural configuration, both the first axial guide hole 36 and the second axial guide hole 35 are located on the ring wall of the guide ring 19. The first pull rod 9 passes through both the first axial guide hole 36 and the first inclined guide hole 10. As the pull ring 5 rotates radially, the first inclined guide hole 10 drives the first pull rod 9 to move up and down along the first axial guide hole 36, thereby causing the first pressure ring 18 to move up and down axially. The second pull rod 6 passes through both the second axial guide hole 35 and the second inclined guide hole 8. As the pull ring 5 rotates radially, the second inclined guide hole 8 drives the second pull rod 6 to move up and down along the second axial guide hole 35, thereby causing the second pressure ring 17 to move up and down axially.

[0044] The guide ring is a fixed component with a ring structure. Its ring wall has an axial guide hole, which can be made of metal and machined into a ring structure with a through hole. It is used to limit the movement trajectory of the tie rod. The function of the axial guide hole is to constrain the tie rod to move only in the vertical direction and avoid radial deviation.

[0045] Specifically, the guide ring provides a vertical movement track for the pull rod through an axial guide hole. When the pull ring is driven to rotate, the inclined guide hole changes position relative to the fixed guide ring, and its hole wall forms a sliding fit with the contact surface of the pull rod. For example, when the pull ring rotates clockwise, the first inclined guide hole pushes the first pull rod upward along the first axial guide hole, causing the first pressure ring to rise; at the same time, the second inclined guide hole pushes the second pull rod downward along the second axial guide hole, causing the second pressure ring to fall. This motion conversion mechanism ensures that the up and down movements of the two pressure rings are strictly synchronized.

[0046] Through the above technical solution, this application achieves precise synchronous control of the pressure ring movement, ensuring that all pickup needles are subjected to uniform force during radial extension and retraction. The axial guide hole structure of the guide ring replaces the traditional spring return device, fundamentally eliminating the risk of return failure caused by spring deformation. The linear motion characteristics of the pull rod within the axial guide hole effectively prevent component wear caused by lateral forces, significantly improving the service life and operational stability of the drive mechanism.

[0047] This application further proposes that the pull ring 5 has a protruding connecting ring 11 on the side of the ring wall, and a connecting hole 71 is provided on the inner side of the connecting ring 11. The connecting hole 71 is connected to a driving device. The driving device includes a connecting shaft 12 connected to the connecting hole 71, a cylinder push rod 13 connected to the connecting shaft 12, and a cylinder 14 installed on the cylinder seat 15. The cylinder push rod 13 moves back and forth to drive the pull ring 5 to rotate.

[0048] The connecting ring refers to an annular protrusion extending outward from the side wall of the pull ring. It can be implemented as a metal ring integrally formed with the pull ring, used to convert the linear motion of the drive device into the rotational motion of the pull ring. The connecting hole is a through-hole structure located inside the connecting ring, used to fix the connecting shaft and transmit driving force. The cylinder push rod is a linear motion component driven by a cylinder, which drives the connecting shaft and the pull ring to rotate around the needle plate axis through reciprocating motion.

[0049] Specifically, the drive unit uses the linear motion of the cylinder push rod to move the connecting shaft axially. The connecting shaft is fixedly connected to the connecting hole of the pull ring, thus converting the linear motion into the circumferential rotation of the pull ring. This drive method can control the forward and reverse rotation of the pull ring with a single cylinder, without relying on multiple pressing components.

[0050] This application further proposes that the guide ring 19 has a third connecting hole 37 axially provided on the ring wall, and the third connecting hole 37 is fixedly connected to the base 7 by a screw, and the base 7 is connected to the transfer arm 1 installed on the sock machine.

[0051] The third connecting hole refers to a through hole arranged along the axial direction of the guide ring, which can be formed by drilling. The screw is a fastener with external threads, which can be a standard bolt or a custom screw, achieving a rigid connection between the guide ring and the base by screwing it into the threaded hole of the base. The base is the mounting base that supports the guide ring, which can be a metal casting or machined part, and its bottom has a mounting interface that matches the transfer arm. The transfer arm is the robotic arm in the sock machine that performs the sock transfer action, which can be an aluminum alloy frame structure, and its end has a mounting position corresponding to the base.

[0052] Specifically, the guide ring is axially positioned with the base via a third connecting hole and a screw, and the base is fixed to the end of the transfer arm with bolts. During installation, the screw passes sequentially through the third connecting hole and the pre-drilled threaded hole on the base, and axial preload is generated by tightening the nut, ensuring a gapless connection between the guide ring and the base. During operation, the base transfers the force on the guide ring to the main structure of the transfer arm, preventing localized stress concentration. Through this technical solution, this application achieves a high-precision rigid connection between the guide ring and the transfer arm, effectively improving the operational stability of the pickup device.

[0053] This application further proposes that the guide ring 19 has a fourth connecting hole 58 axially provided on the ring wall. The fourth connecting hole 58 is connected to the annular cover plate 2 through a screw. The annular cover plate 2 is pressed into the anti-tilting ring 16 on the side near the needle plate axis 50. The anti-tilting ring 16 is pressed into the pickup needle ring.

[0054] The fourth connecting hole refers to a through hole located axially in the guide ring wall, used to form a fixed connection with the annular cover plate. The annular cover plate is an annular metal plate covering the top of the guide ring. The anti-tilting ring is an annular component located between the annular cover plate and the pickup needle ring, maintaining contact with the pickup needle ring through the axial pressure of the annular cover plate.

[0055] Specifically, the guide ring is axially fixed to the annular cover plate through the fourth connecting hole. The inner edge of the annular cover plate extends downward to form a pressing surface, which contacts the upper surface of the anti-warping ring. When the screw is tightened, the annular cover plate applies axial pressure to the anti-warping ring, which then evenly transmits the pressure to the top of the pickup needle of the pickup needle ring, thereby limiting the axial displacement of the pickup needle in the needle groove. This structure prevents the pickup needle from axially warping due to uneven force during movement. Through the above technical solution, this application can eliminate the axial displacement deviation of the pickup needle during radial movement, ensure that all pickup needles maintain stable linear movement in the needle groove, avoid the problem of coil hooking failure caused by individual needle warping, and thus improve the reliability of the sock transfer process.

[0056] This application further proposes that the groove walls 30 on both sides of the needle groove 3 are provided with raised guide groove walls 29, and the guide groove walls 29 are in close contact with the first bearing surface 27 and the second bearing surface 26 of the pickup needle 25.

[0057] The guide groove wall refers to a protruding structure extending along the length of the needle groove, which can be implemented using a trapezoidal cross-section metal protrusion. This structure serves to mechanically limit the bearing surface of the pickup needle. The "fitting connection" refers to the surface contact fit between the guide groove wall and the bearing surface of the pickup needle. Through the above technical solution, this application solves the problem of trajectory deviation caused by insufficient guidance from the groove wall in traditional pickup needles.

[0058] This application further proposes that the first bearing surface 27 of the pickup needle 25 is an inclined structure, and the first bearing surface 27 is attached to the inclined surface 28 of the first pressure ring 18; the second bearing surface 26 of the pickup needle 25 is an inclined structure, and the second bearing surface 26 is attached to the inclined surface 31 of the second pressure ring 17.

[0059] The first bearing surface refers to the inclined contact surface on the pickup needle used to receive the driving force of the first pressure ring. Specifically, it can be implemented using a sloped structure with an angle matching the inclined surface of the first pressure ring, converting axial pressure into radial motion components through sloped contact. The second bearing surface refers to the reverse inclined contact surface on the other side of the pickup needle used to receive the driving force of the second pressure ring. Specifically, it can be implemented using a sloped structure with an angle complementary to the inclined surface of the second pressure ring, achieving reverse motion conversion through reverse sloped contact. The inclined surface of the first pressure ring refers to the sloped structure that forms surface contact with the first bearing surface. The inclined surface of the second pressure ring refers to the reverse annular sloped structure that forms surface contact with the second bearing surface, specifically using conical surfaces symmetrically distributed with the inclined surface of the first pressure ring, achieving bidirectional drive through the cooperation of reverse slopes.

[0060] Specifically, when the first pressure ring moves axially downwards, its inclined surface contacts the inclined surface of the first bearing surface of the pickup needle, generating a radially outward force that pushes the pickup needle outwards along the needle groove. When the second pressure ring moves axially downwards, its inclined surface contacts the inclined surface of the second bearing surface, generating a radially inward force that drives the pickup needle to return to its original position along the needle groove. The inclined surface contact method replaces the traditional point contact with surface pressure transmission, avoiding local stress concentration.

[0061] Through the above technical solution, this application achieves uniform driving force transmission to all pickup needles, avoiding the problem of needle leakage caused by the lack of driving force at the junction of multiple pressing parts. The inclined contact structure enables the pressure ring and pickup needle to form continuous surface contact, significantly improving driving stability. At the same time, the mechanical reset mechanism replaces the spring element, extending the service life of the device and reducing the failure rate.

[0062] This application further proposes that the first pressure ring 18 and the second pressure ring 17 are coaxially arranged, the first pressure ring 18 is located outside the second pressure ring 17, and the ring wall of the first pressure ring 18 is provided with a avoidance hole 56 for the second pull rod 6 to pass through.

[0063] The coaxial arrangement refers to the alignment of the axes of the first and second pressure rings, which can be achieved using a concentric ring structure. This design ensures that the two pressure rings remain spatially aligned during vertical movement, avoiding motion interference. The avoidance hole refers to a through hole formed in the wall of the first pressure ring, which can be implemented using a circular or elliptical hole structure. This hole allows the second tie rod to pass freely through the first pressure ring during axial movement, eliminating structural obstruction.

[0064] Specifically, the concentric arrangement of the first and second pressure rings creates a layered control structure when driving the pickup needle. The first pressure ring is located on the outer side, and the diameter of its avoidance hole is larger than the diameter of the second pull rod, ensuring that the second pull rod does not contact the first pressure ring during its up-and-down movement. When the second pressure ring is driven to move up and down by the second pull rod, the second pull rod moves unimpeded through the avoidance hole, while the first pressure ring independently drives the first bearing surface of the pickup needle. This structure, through its spatially staggered design, ensures that the driving paths of the two pressure rings do not interfere with each other, thereby achieving synchronous and stable bidirectional driving force transmission.

[0065] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A non-spring-return sock picking device for a sock knitting machine, comprising picking needles (25) that cooperate with the knitting needles of the sock knitting machine to pick up sock loops, wherein the picking needles (25) are arranged in a ring and installed in the needle groove (3) of the needle plate (23) to form a picking needle ring, characterized in that: The pickup needle (25) includes a first bearing surface (27) and a second bearing surface (26) that are inclined. The first bearing surface (27) and the second bearing surface (26) are inclined in opposite directions. The pickup needle ring is subjected to a first driving force through the first bearing surface (27) of the pickup needle. The second bearing surface (26) of the pickup needle is subjected to a second driving force. The first driving force drives the pickup needle of the pickup needle ring to move along the needle groove (3) from near the needle plate axis to away from the needle plate axis (50). The second driving force drives the pickup needle of the pickup needle ring to move along the needle groove from away from the needle plate axis (50) to near the needle plate axis. The first driving force is generated by pressing down the first pressure ring (18), which simultaneously cooperates with the first bearing surface (27) of all the pickup needles (25) forming the pickup needle ring; the second driving force is generated by pressing down the second pressure ring (17), which simultaneously cooperates with the second bearing surface (26) of all the pickup needles (25) forming the pickup needle ring; the first pressure ring (18) moves downward while the second pressure ring (17) moves upward; the first pressure ring (18) moves upward while the second pressure ring (17) moves downward. The first pressure ring (18) is connected to the first pull rod (9) through the first connecting hole (51). The first pull rod (9) moves up and down along the first axial guide hole (36) under the drive of the first inclined guide hole (10). The second pressure ring (17) is connected to the second pull rod (6) through the second connecting hole (52). The second pull rod (6) moves up and down along the second axial guide hole (35) under the drive of the second inclined guide hole (8). The first inclined guide hole (10) and the second inclined guide hole (8) are both located on the ring wall of the pull ring (5). The pull ring (5) is connected to the driving device. The driving device drives the pull ring (5) to rotate radially around the needle plate axis (50).

2. The sock-picking device for a sock-making machine with non-spring return mechanism according to claim 1, characterized in that: The first axial guide hole (36) and the second axial guide hole (35) are both located on the ring wall of the guide ring (19); the first pull rod (9) passes through the first axial guide hole (36) and the first inclined guide hole (10) at the same time. The first inclined guide hole (10) drives the first pull rod (9) to move up and down along the first axial guide hole (36) as the pull ring (5) rotates radially, thereby driving the first pressure ring (18) to move up and down axially; the second pull rod (6) passes through the second axial guide hole (35) and the second inclined guide hole (8) at the same time. The second inclined guide hole (8) drives the second pull rod (6) to move up and down along the second axial guide hole (35) as the pull ring (5) rotates radially, thereby driving the second pressure ring (17) to move up and down axially.

3. The sock-picking device for a sock-making machine with non-spring-return mechanism according to claim 1, characterized in that: The pull ring (5) has a protruding connecting ring (11) on the side of the ring wall. The inner side of the connecting ring (11) has a connecting hole (71). The connecting hole (71) is connected to the driving device. The driving device includes a connecting shaft (12) connected to the connecting hole (71). The connecting shaft (12) is connected to the cylinder push rod (13). The cylinder push rod (13) is connected to the cylinder (14) installed on the cylinder seat (15). The cylinder push rod (13) moves back and forth to drive the pull ring (5) to rotate.

4. A non-spring-return sock-picking device for a sock-picking machine according to claim 2, characterized in that: The guide ring (19) has a third connecting hole (37) axially provided on its ring wall. The third connecting hole (37) is fixedly connected to the base (7) by a screw. The base (7) is connected to the transfer arm (1) installed on the sock machine.

5. A non-spring-return sock-picking device for a sock-picking machine according to claim 2, characterized in that: The guide ring (19) has a fourth connecting hole (58) axially provided on its ring wall. The fourth connecting hole (58) is connected to the annular cover plate (2) by a screw. The annular cover plate (2) is pressed into the anti-tilting ring (16) on the side near the needle plate axis (50). The anti-tilting ring (16) is pressed into the pickup needle ring.

6. A non-spring-return sock-picking device for a sock-picking machine according to claim 1, characterized in that: The needle groove (3) has raised guide groove walls (29) on both sides of the groove wall (30), and the guide groove wall (29) fits and connects the first bearing surface (27) and the second bearing surface (26) of the pickup needle (25).

7. A non-spring-return sock-picking device for a sock-picking machine according to claim 1, characterized in that: The first bearing surface (27) of the pickup needle (25) is a sloping structure, and the first bearing surface (27) is attached to the inclined surface (28) of the first pressure ring (18); the second bearing surface (26) of the pickup needle (25) is a sloping structure, and the second bearing surface (26) is attached to the inclined surface (31) of the second pressure ring (17).

8. A non-spring-return sock-picking device for a sock-picking machine according to claim 2, characterized in that: The first pressure ring (18) and the second pressure ring (17) are coaxially arranged. The first pressure ring (18) is located outside the second pressure ring (17). The ring wall of the first pressure ring (18) is provided with a avoidance hole (56) for the second pull rod (6) to pass through.

Images