Transfer needle and transfer device with same

Abstract

The utility model belongs to the technical field of hosiery machines, particularly relates to a transfer needle and a transfer device provided with the transfer needle, and solves the problems that the number of parts is high and the assembly cost is high. The transfer needle comprises a sheet-shaped needle body, a transfer hook is arranged at the front end of the needle body, the rear end of the needle body is connected with at least one elastic supporting rod, and the elastic supporting rod has an elastic trend enabling the free end to be far away from the needle body. The transfer device comprises an annular disc body arranged on a machine frame, a plurality of needle grooves penetrating in the radial direction are evenly distributed in the inner ring of the disc body in the circumferential direction, the transfer needles are connected into the needle grooves in a sliding mode, and transfer hooks of the transfer needles stretch out to the inner side of the inner ring. The free end abuts against a vertical abutting face located on the inner side of the outer ring of the disc body and has the elastic tendency to enable the needle body to extend inwards in the radial direction, and a retraction driving mechanism is further arranged between the annular disc body and the transfer needle. The effects of reducing the number of parts and lowering the assembly cost are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of sock knitting technology, and specifically relates to a transfer needle and a transfer device equipped with the transfer needle. Background Technology

[0002] Socks can be manufactured by knitting with a sock machine. In the knitting process, after the sock cuff is knitted on the needle cylinder, it needs to be transferred to a corresponding device for sewing the toe. This transfer action needs to be achieved by a corresponding transfer device.

[0003] Chinese Patent Publication No. CN101970739B discloses a pickup device for picking up tubular knitted items from a circular knitting machine for socks and for conveying the items to a unit suitable for additional processing on the items. The pickup device includes: an annular pickup body supporting pickup members, the pickup members being radially slidable relative to the pickup body, the pickup body being coaxially arranged around the cylinder of the circular knitting machine for socks such that each side of the pickup members faces the needles of the circular knitting machine; and an actuation device configured to act on the pickup members to move the pickup members toward or away from the axis of the pickup body, thereby... Each pickup engages or disengages with the needle of the circular knitting machine it faces, each pickup being adapted to pick up a knitted loop held on the needle, each pickup having a seat at its end facing the axis of the pickup body, the seat being mateable with an area of ​​the needle shank near the side opposite to the needle tip of the needle where the needle tongue is arranged; and the actuation device includes an elastic element and a radial pusher, the elastic element acting on the pickup to cause the pickup to slide toward the axis of the pickup body, and the radial pusher acting on the pickup to cause the pickup to slide away from the axis of the pickup body against the action of the elastic element.

[0004] However, the aforementioned prior art achieves radial extension of the transfer needle by adding an elastic element such as a ring-shaped rubber band. This means that during assembly, the transfer needle needs to be inserted into the corresponding needle groove and the rubber band needs to be looped around the rear end of all the transfer needles, which increases the number of parts and the assembly cost. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a transfer needle.

[0006] To achieve this innovative objective of this utility model, the following technical solutions can be used:

[0007] A transfer needle includes a sheet-like needle body, a transfer hook at the front end of the needle body, and at least one elastic support rod connected to the rear end of the needle body, the elastic support rod having an elastic tendency to move the free end away from the needle body.

[0008] The transfer needle of this invention is a sheet-shaped needle body. A transfer hook and an elastic support rod are respectively provided at the front and rear ends of the needle body. The transfer hook is used to cooperate with the vertical knitting needle to transfer the loop. The free end of the elastic support rod abuts against the relevant abutting surface on the disc body, so that the transfer needle itself can have the tendency to move and extend in the direction of the transfer hook. There is no need to set up a related driving structure on the transfer device, which reduces assembly cost and structural cost.

[0009] In the aforementioned transfer needle, the fixed end of the elastic support rod is connected to the needle body, and the fixed end and the free end are connected by an arc-shaped, straight, or broken rod, which has a deformation tendency to move the free end away from the needle body.

[0010] The elastic strut is generally straight, curved, or zigzag-shaped. Its fixed end is connected to the rear end of the needle, maintaining an outward-protruding position. An acute-angle space is formed between the strut and the needle, allowing the needle to be pressed against a vertical abutment surface. When an external force pushes the needle against the vertical abutment surface, the strut can adapt its deformation. After the external force is removed, the elastic strut can return to its original shape, effectively pushing the needle forward. Furthermore, like the needle, the elastic strut is a sheet of metal, and its bending direction is perpendicular to its thickness. Practical experience has shown that it possesses sufficient resistance to deformation fatigue.

[0011] In the aforementioned transfer needle, the fixed end is integrally connected to the needle body, or welded, hinged, or screwed; the free end has an arc-shaped contact surface on the side away from the needle body, which can slide against the vertical contact surface of the transfer device.

[0012] The connection between the fixed end and the needle body can be achieved through either non-removable or detachable fixing. Non-removable fixing can be achieved through methods such as integral forming or welding, while detachable fixing can be achieved through methods such as hinges or screws. There are various setting methods, with integral forming being the preferred option. The free end is in contact with the vertical abutment surface through its arc-shaped contact surface. During compression deformation and recovery, the arc-shaped contact surface slides on the vertical abutment surface, and the arc shape makes the relative sliding smoother.

[0013] In the aforementioned transfer needle, the needle body is L-shaped, including a horizontal section and a vertical section. The transfer hook is located at the front end of the horizontal section, and a positioning vertical groove is provided on the front side of the transfer hook. The vertical section is located at the rear end of the horizontal section, and the fixed end of the elastic support rod is connected to the upper or lower part of the rear end of the vertical section. The vertical section and the horizontal section are integrally connected, or welded, hinged, or screwed.

[0014] The horizontal section of the needle body is the main body. When it extends forward, the positioning groove at the front end can engage with the vertical needle to achieve a positioning effect. The vertical section has an upward convex shape, which facilitates the drive of the retraction drive mechanism of the transfer device. The connection between the vertical section and the horizontal section is similar to the setting of the elastic support rod and has various settings, among which the integral forming method is preferred.

[0015] Another objective of this invention is to address the aforementioned problems in the prior art by proposing a transfer device.

[0016] To achieve this innovative objective of this utility model, the following technical solutions can be used:

[0017] A transfer device includes an annular disc mounted on a frame. The inner circumference of the disc has a plurality of radially penetrating needle grooves evenly distributed thereon. A transfer needle is slidably connected in the needle grooves. The transfer hook of the transfer needle extends to the inner side of the inner circumference. The free end of the transfer needle abuts against a vertical abutting surface located on the inner side of the outer circumference of the disc, and has an elastic tendency to extend the needle radially inward. A retraction drive mechanism is also provided between the annular disc and the transfer needle.

[0018] The main body of the transfer device of this utility model is a ring-shaped disc, which includes a concentric inner ring, an outer ring, a top plate, and a bottom plate. A square mounting area is formed within the four discs. The transfer needle is inserted into the needle groove, and its transfer hook extends out from the inner side of the inner ring to specifically realize the transfer of the coil. To further stabilize and guide the movement of the transfer needle, a corresponding groove can be provided on the bottom plate. This groove communicates with the needle groove in the same direction, jointly guiding the movement of the transfer needle. All the transfer needles form a ring, with the rear half of the transfer needle located within the mounting area. The retraction drive mechanism and the elastic support rod are all properly engaged within the mounting area, preventing interference. The free end of the elastic support rod abuts against the vertical abutment surface of the outer ring, causing the needle to tend to extend away from the outer ring towards the center. This tendency is achieved by the deformation recovery capability of the elastic support rod, i.e., it is elastic, which can prevent rigid collisions with vertical knitting needles and prevent damage to the knitting needles or transfer needles. The retraction drive mechanism is used to drive the transfer needle in the opposite direction, thus realizing bidirectional movement control of the transfer needle's radial extension or retraction.

[0019] In the aforementioned transfer device, the retraction drive mechanism includes several fan-shaped radial actuators arranged in a ring. The radial actuators are slidably connected to the disc body, capable of radial movement but not circumferential rotation. The inner side of the vertical section of the transfer needle abuts against the radial actuator. An annular actuating disc is rotatably connected to the upper end of the disc body. The actuating disc has several guide grooves circumferentially distributed, inclined relative to the circumferential direction. A guide rod is vertically fixed at the top of the radial actuator, and the guide rod slides within the guide groove. The actuating disc is connected to the rotation drive assembly and can rotate circumferentially to drive the radial actuator to push the transfer needle radially outward.

[0020] As the first solution, the retraction drive mechanism can directly push the transfer pins radially outward using radial actuators. These radial actuators are fan-shaped, with multiple actuators forming a ring to ensure effective control of all transfer pins. The radial movement of the actuators is achieved through guide grooves in the actuation disk. The distances from the two ends of these guide grooves to the center of the actuation disk are different, but all guide grooves are tilted in the same direction to ensure consistent control of the entry and exit of each radial actuator. Driven by the rotation drive assembly, the actuation disk can reciprocate circumferentially. Since the radial actuators cannot rotate circumferentially due to the structure, as the guide grooves rotate with the actuation disk, the guide rods slide along the length of the grooves, causing a change in the distance of the guide rods relative to the center of the actuation disk, thus controlling the radial movement of the actuators. To prevent uncontrollable rotation of the radial actuators during movement, each radial actuator should have at least two guide rods. The connection between the guide rods and the radial actuators can be achieved using bolts or similar methods, providing flexible disassembly. The principle of this retraction drive mechanism is similar to the relevant part of the patent with patent number CN101970739B, and further details will not be elaborated.

[0021] In the aforementioned transfer device, a top plate is fixedly mounted on the upper end of the disc body, and a radially extending limiting groove is provided on the top plate, through which the guide rod passes; the actuation disc has at least two circumferentially extending arc-shaped positioning grooves distributed circumferentially, and positioning bolts pass through the positioning grooves and are screwed to the disc body; the rotation drive assembly includes a linear drive cylinder whose output shaft is hinged to the actuation disc, the cylinder body of the linear drive cylinder is hinged to the frame, and the axis of the output shaft does not pass through the center of the actuation disc.

[0022] The guide rod slides within a radially extending limiting groove, enabling the radial actuator to move radially but not rotate circumferentially. A positioning bolt passes through a positioning groove on the actuator disc and connects to the disc body. This circumferentially extending positioning groove allows the actuator disc to rotate circumferentially around a single point. The length of this positioning groove also limits the rotation angle of the actuator disc. The rotation drive assembly is specifically implemented using a linear drive cylinder hinged to the frame. The front end of the output shaft of this linear drive cylinder is connected to the outside of the actuator disc, enabling it to rotate. The hinged design allows for adaptive rotation during the driving process. The specific hinge details are common knowledge and will not be elaborated upon.

[0023] In the aforementioned transfer device, the retraction drive mechanism includes an annular axial actuator. The axial actuator is slidably connected to the disc body and is connected to the transfer needle via a transmission structure. A lifting drive structure is provided between the axial actuator and the disc body, which can drive the axial actuator to move downward to push the transfer needle to move radially outward.

[0024] As another option, the retraction drive mechanism can be implemented by an axial actuator. The axial actuator moves axially under the control of the lifting drive structure. The transmission structure can convert this axial movement into the radial movement of the transfer needle through, for example, an inclined plane. Since the axial actuator is annular, the retraction drive of all transfer needles is achieved by it, which helps to ensure the synchronization of the drive and avoids the problem that the gap between adjacent radial actuators cannot effectively cooperate with the transfer needle.

[0025] In the aforementioned transfer device, an installation area is formed between the inner and outer rings of the disc body. The top plate of the disc body is provided with an axially extending groove that opens to the installation area. The upper part of the axial actuator is provided with an annular sliding part. The sliding part is slidably connected to the groove. The top of the groove is connected to an air channel. The air inlet of the air channel is connected to a high-pressure gas generating component. A sliding sealing structure is provided between the sliding part and the groove.

[0026] The axial actuator is slidably connected to the slide groove via its sliding part, enabling vertical sliding movement. The lifting and lowering of the axial actuator can be achieved pneumatically. An annular power cavity is formed between the inner top surface of the slide groove and the top surface of the sliding part. A sliding sealing structure ensures the sealing of this power cavity. The air passage on the disc body communicates with this power cavity, and the air inlet at the outer end is connected to a high-pressure gas generating component. High-pressure gas can be input into the power cavity to press the axial actuator downwards. When upward resetting is required, the high-pressure gas can be discharged, allowing the transfer needle to move radially inwards under the combined action of the elastic support rod. The transfer needle can push the axial actuator back to reset via a transmission structure. Furthermore, the upward movement of the axial actuator can also be achieved by the high-pressure gas generating component extracting gas from the power cavity to create negative pressure, which can attract the axial actuator upwards. The specific structure, connection details, and switching valve assembly between the high-pressure gas generating component and the disc body are common knowledge and will not be elaborated upon.

[0027] As an optimization, the slide groove is located on the side of the top plate near the inner ring, and the inner sidewall of the slide groove and the radial outer sidewall of the inner ring are smoothly connected. The sliding sealing structure includes an annular sealing ring disposed between the radial outer side of the sliding part and the slide groove sidewall, and an annular sealing ring disposed between the radial inner side of the axial actuator and the slide groove sidewall. Of course, the sealing ring is engaged in the corresponding sealing groove.

[0028] In the above-mentioned transfer device, the transmission structure includes a transmission inclined surface disposed at the lower end of the axial actuator, the transmission inclined surface being radially outward and downward toward the vertical section of the transfer needle, and the vertical section and the transmission inclined surface being slidably connected.

[0029] Alternatively, the transmission structure may include a transmission ramp disposed at the upper end of the vertical section, the transmission ramp being radially inward and upward toward the lower end of the axial actuator, and the transmission ramp being slidably connected to the lower end of the axial actuator.

[0030] The transmission structure can be achieved through a transmission ramp, which can be set on the axial actuator or the transfer needle. When the axial actuator and the transfer needle approach each other in the vertical direction, the transmission ramp will cause the two to move relative to each other in the horizontal direction, thereby realizing the effect of converting the corresponding axial input into radial output.

[0031] In the aforementioned transfer device, the axial actuator has a T-shaped cross-section and includes an annular body. The top surface of the annular body is provided with the sliding part, and the lower part is provided with a downward and radially outward transmission inclined surface. The top surface of the disc body is provided with a pull rod hole, and a pull rod bolt is inserted into the pull rod hole. The lower end of the pull rod bolt is screwed to the axial actuator. The pull rod hole is provided with an annular step with the stepped surface facing upward. A spring in a compressed state is provided between the annular step and the bolt head of the pull rod bolt.

[0032] To enable or assist the upward movement of the axial actuator, a tie rod bolt is provided on the axial actuator. The tie rod bolt passes through the disc body, and a spring is sleeved on the tie rod bolt. The upper and lower ends of the spring abut against the bottom surface of the bolt head and the annular step in the tie rod hole, respectively, to apply an upward elastic force to the axial actuator. Under the combined action of the reverse thrust of the transfer pin, the axial actuator can be driven to rise and reset.

[0033] As an optimization, a limiting step is provided between the vertical section of the transfer needle near the center of the disc and the upper side of the horizontal section. The radially inner side of the limiting step abuts against the radially outer sidewall of the inner ring of the disc. The limiting step ensures a minimum gap between the vertical section and the inner ring, guaranteeing that the transmission ramp and the corresponding component are always in sliding contact.

[0034] Compared with the prior art, the present invention has the following main advantages:

[0035] 1. The free end of the elastic strut abuts against the relevant abutting surface on the disc, so that the transfer needle itself has the tendency to move and extend in the direction of the transfer hook. There is no need to set up a related drive structure on the transfer device, which reduces assembly cost and structural cost.

[0036] 2. The fixed end of the elastic strut is connected to the rear end of the needle body, maintaining an outward protruding state. An acute-angle space is formed between the strut and the needle body, which allows the needle body to be pressed against the vertical abutment surface. When an external force pushes the needle body against the vertical abutment surface, the strut can make an adaptive deformation. After the external force is removed, the elastic strut can deform and return to its original shape, achieving the effect of pushing the needle body forward.

[0037] 3. The free end is in contact with the vertical abutment surface through the arc-shaped contact surface. When it is compressed and deformed and recovers, the arc-shaped contact surface slides on the vertical abutment surface. The arc shape makes the relative sliding smoother.

[0038] 4. The rear half of the transfer needle is located within the mounting area. The retraction drive mechanism and the elastic support rod are both properly coordinated within the mounting area, preventing interference. The free end of the elastic support rod abuts against the vertical abutment surface of the outer ring, causing the needle body to tend to extend away from the outer ring towards the center. This tendency is achieved by the deformation recovery capability of the elastic support rod, which is elastic and avoids rigid collisions with vertical knitting needles, preventing damage to the knitting needle or transfer needle. The retraction drive mechanism drives the transfer needle in the opposite direction, thus achieving bidirectional movement control of the transfer needle's radial extension or retraction.

[0039] 5. The retraction drive mechanism can be realized by directly pushing the transfer pin radially outward through the radial actuator. The actuation disk can reciprocate in the circumferential direction under the drive of the rotation drive assembly. Since the radial actuator cannot rotate in the circumferential direction under the action of the corresponding structure, when the guide groove rotates with the actuation disk, the guide rod slides in the guide groove along the length of the groove, so that the distance of the guide rod relative to the center of the actuation disk changes, thereby achieving the effect of controlling the radial movement of the radial actuator.

[0040] 6. The retraction drive mechanism can also be realized by an axial actuator. The axial actuator moves axially under the control of the lifting drive structure. The transmission structure can convert the axial movement into the radial movement of the transfer needle. Since the axial actuator is annular, the retraction drive of all transfer needles is realized by it, which helps to ensure the synchronization of the drive and avoids the problem that the gap between adjacent radial actuators cannot effectively cooperate with the transfer needle.

[0041] 7. In order to realize or assist the upward movement of the axial actuator, a tie rod bolt is provided on the axial actuator. A spring is sleeved on the tie rod bolt, and the upper and lower ends respectively abut against the bottom surface of the bolt head and the annular step in the tie rod hole, applying an upward elastic force to the axial actuator. Under the combined action of the reverse thrust of the transfer pin, the axial actuator can be driven to rise and reset. Attached Figure Description

[0042] Figure 1 This is a cross-sectional schematic diagram of the transfer needle of Embodiment 1 provided by this utility model;

[0043] Figure 2 This is a cross-sectional schematic diagram of the transfer device of Embodiment 1 provided by this utility model (the transfer needle is in an extended state).

[0044] Figure 3 This is a cross-sectional schematic diagram of the transfer device of Embodiment 1 provided by this utility model (the transfer needle is in a retracted state).

[0045] Figure 4 This is a cross-sectional schematic diagram of the disc body of Embodiment 1 provided by this utility model;

[0046] Figure 5 This is a cross-sectional schematic diagram of the axial actuator of Embodiment 1 provided by this utility model;

[0047] Figure 6 This is a cross-sectional schematic diagram of the transfer device of Embodiment 2 provided by this utility model (the transfer needle is in an extended state).

[0048] Figure 7 This is a cross-sectional schematic diagram of the transfer device of Embodiment 2 provided by this utility model (the transfer needle is in a retracted state).

[0049] Figure 8 This is a schematic diagram of the cooperation between the actuator disc and the linear drive cylinder in Embodiment 2 of this utility model;

[0050] Figure 9 This is a cross-sectional schematic diagram of the transfer needle in Embodiment 3 of this utility model;

[0051] Figure 10 This is a cross-sectional schematic diagram of the transfer needle in Embodiment 4 of this utility model.

[0052] In the diagram, the components are: transfer needle 1, needle body 11, transfer hook 12, horizontal section 13, vertical section 14, positioning vertical groove 15, limiting step 16, elastic support rod 2, fixed end 21, free end 22, rod body 23, arc-shaped contact surface 24, disc body 3, inner ring 31, outer ring 32, top plate 33, bottom plate 34, needle groove 35, vertical abutment surface 36, installation area 37, retraction drive mechanism 4, radial actuator 41, actuator disc 42, guide groove 43, guide rod 44, limiting groove 45, positioning groove 46, positioning bolt 47, linear drive cylinder 48, axial actuator 49, slide groove 50, sliding part 51, air channel 52, air inlet 53, transmission inclined surface 54, sealing ring 55, annular body 56, pull rod hole 57, pull rod bolt 58, annular step 59, and spring 60. Detailed Implementation

[0053] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0054] Example 1

[0055] Specific implementation examples Figure 1-3 As shown, the transfer needle 1 in this embodiment includes a sheet-like needle body 11, a transfer hook 12 at the front end of the needle body 11, and an elastic support rod 2 connected to the rear end of the needle body 11. The elastic support rod 2 has an elastic tendency to move the free end 22 away from the needle body 11.

[0056] Specifically, in this embodiment, the transfer needle 1 is a sheet-shaped needle body 11. A transfer hook 12 and an elastic support rod 2 are respectively provided at the front and rear ends of the needle body 11. The transfer hook 12 is used to cooperate with the vertical knitting needle to transfer the loop. The free end 22 of the elastic support rod 2 abuts against the relevant abutting surface on the disc body 25, so that the transfer needle 1 itself can have the tendency to move and extend in the direction of the transfer hook 12.

[0057] like Figure 1 As shown, the fixed end 21 of the elastic support rod 2 is connected to the needle body 11, and the fixed end 21 and the free end 22 are connected by an arc-shaped rod 23. The rod 23 has a deformation tendency to move the free end 22 away from the needle body 11. The fixed end 21 is integrally connected to the needle body 11, and the side of the free end 22 away from the needle body 11 is provided with an arc-shaped contact surface 24, which can slide against the vertical abutment surface 36 of the transfer device.

[0058] Specifically, the elastic strut 2 is generally arc-shaped, with its fixed end 21 connected to the upper side of the rear end of the needle body 11, maintaining an outward protruding state. An acute-angle space is formed between the strut 23 and the needle body 11, allowing the needle body 11 to be pressed against the vertical abutment surface 36. When an external force pushes the needle body 11 against the vertical abutment surface 36, the strut 23 can adapt to the deformation, and after the external force is removed, the elastic strut 2 can return to its original shape, achieving the effect of pushing the needle body 11 forward. Furthermore, like the needle body 11, the elastic strut 2 is a sheet of metal, and the bending direction of the strut 23 is perpendicular to the thickness direction. Practical experience has shown that it has sufficient resistance to deformation fatigue. The fixed end 21 is integrally formed with the needle body 11, providing good structural strength. The free end 22 is in contact with the vertical abutment surface 36 through its arc-shaped contact surface 24. When it is compressed and deformed and recovers, the arc-shaped contact surface 24 slides on the vertical abutment surface 36. The arc shape makes the relative sliding smoother.

[0059] In this embodiment, the needle body 11 is L-shaped, including a horizontal section 13 and a vertical section 14. The transfer hook 12 is disposed at the front end of the horizontal section 13, and a positioning vertical groove 15 is also provided on the front side of the transfer hook 12. The vertical section 14 is disposed at the rear end of the horizontal section 13. The fixed end 21 of the elastic support rod 2 is inclined toward the direction of the transfer hook 12. The fixed end 21 is connected to the upper part of the rear end of the vertical section 14. The vertical section 14 and the horizontal section 13 are integrally connected.

[0060] Specifically, the horizontal section 13 of the needle body 11 is the main body. When it extends forward, the positioning vertical groove 15 at the front end can engage with the vertical knitting needle to achieve a positioning effect. The vertical section 14 has an upward protruding shape, which facilitates the driving engagement of the retraction drive mechanism 4 of the transfer device.

[0061] like Figure 1-5As shown, the transfer device of this embodiment includes an annular disc 25 mounted on a frame. The inner ring 31 of the disc 25 has a plurality of radially penetrating needle grooves 35 evenly distributed around it. The aforementioned transfer needle 1 is slidably connected in the needle grooves 35. The transfer hook 12 of the transfer needle 1 extends to the inner side of the inner ring 31, and the free end 22 abuts against the vertical abutting surface 36 located on the inner side of the outer ring 32 of the disc 25, and has an elastic tendency to cause the needle body 11 to extend radially inward. A retraction drive mechanism 4 is also provided between the annular disc 25 and the transfer needle 1.

[0062] Specifically, the main body of this transfer device is a ring-shaped disc 25, which includes a concentric inner ring 31, an outer ring 32, a top disc 33, and a bottom disc 34. A square mounting area 37 is formed within the four discs 25. The transfer needle 1 is inserted into the needle groove 35, and its transfer hook 12 extends from the inner side of the inner ring 31 to specifically realize the transfer of the coil. To further stabilize and guide the movement of the transfer needle 1, a groove is provided on the bottom disc 34. This groove communicates in the same direction as the needle groove 35, jointly guiding the movement of the transfer needle 1. All the transfer needles 1 form a ring, with the rear half of each needle located within the mounting area 37. The retraction drive mechanism 4 and the elastic support rod 2 are both properly engaged within the mounting area 37, preventing interference. The free end 22 of the elastic support rod 2 abuts against the vertical abutment surface 36 of the outer ring 32, causing the needle body 11 to tend to extend away from the outer ring 32 towards the center. This tendency is achieved by the deformation recovery capability of the elastic support rod 2, which is elastic and can avoid rigid collision with the vertical knitting needle, thus preventing damage to the knitting needle or transfer needle 1. The retraction drive mechanism 4 is used to drive the transfer needle 1 in the opposite direction, thereby realizing bidirectional movement control of the transfer needle 1 radially extending or retracting.

[0063] like Figure 1 , 2 As shown in Figures 3 and 5, the retraction drive mechanism 4 includes an annular axial actuator 49. The axial actuator 49 is slidably connected to the disc body 25 and is connected to the transfer needle 1 through a transmission structure. A lifting drive structure is provided between the axial actuator 49 and the disc body 25, which can drive the axial actuator 49 to move downward to push the transfer needle 1 to move radially outward.

[0064] Specifically, the retraction drive mechanism 4 can be realized by the axial actuator 49. The axial actuator 49 moves axially under the control of the lifting drive structure. The transmission structure converts the axial movement into the radial movement of the transfer needle 1 through the transmission inclined plane. Since the axial actuator 49 is annular, the retraction drive of all transfer needles 1 is realized by it, which helps to ensure the synchronization of the drive and avoids the problem that the gap between adjacent radial actuators 41 cannot effectively cooperate with the transfer needle 1.

[0065] like Figure 2-4As shown, an installation area 37 is formed between the inner ring 31 and the outer ring 32 of the disc body 25. The top plate 33 of the disc body 25 has an axially extending groove 50 that opens into the installation area 37. An annular sliding portion 51 is provided on the upper part of the axial actuator 49. The sliding portion 51 is slidably connected within the groove 50. The top of the groove 50 communicates with an air passage 52. The air inlet 53 of the air passage 52 is connected to a high-pressure gas generating component. A sliding sealing structure is provided between the sliding portion 51 and the groove 50. The groove 50 is located on the side of the top plate 33 closest to the inner ring 31. The inner sidewall of the groove 50 and the radially outer sidewall of the inner ring 31 are smoothly connected. The sliding sealing structure includes an annular sealing ring 55 disposed between the radially outer sidewall of the sliding portion 51 and the sidewall of the groove 50, and between the radially inner sidewall of the axial actuator 49 and the sidewall of the groove 50.

[0066] Specifically, the axial actuator 49 is slidably connected to the slide groove 50 via its sliding part 51, enabling vertical sliding movement. The lifting and lowering drive of the axial actuator 49 can be achieved pneumatically. An annular power cavity is formed between the inner top surface of the slide groove 50 and the top surface of the sliding part 51. The sliding sealing structure ensures the sealing of the power cavity. The air passage 52 on the disc 25 is connected to the power cavity, and the air inlet 53 at the outer end is connected to the high-pressure gas generating component, which can input high-pressure gas into the power cavity to press the axial actuator 49 downward. When it is necessary to rise and reset, the high-pressure gas can be discharged, allowing the transfer needle to move radially inward under the combined action of the elastic support rod 2. The transfer needle can push the axial actuator 49 back to reset through the transmission structure. Furthermore, the upward movement of the axial actuator 49 can also be achieved by the high-pressure gas generating component extracting gas from the power cavity to form a negative pressure, which can attract the axial actuator 49 upward.

[0067] In this embodiment, the transmission structure includes a transmission ramp 54 disposed at the lower end of the axial actuator 49. The transmission ramp 54 is radially outward and downward toward the vertical section 14 of the transfer needle 1, and the vertical section 14 and the transmission ramp 54 are slidably connected. When the axial actuator 49 and the transfer needle 1 approach each other in the vertical direction, the transmission ramp 54 will cause the two to move relative to each other in the horizontal direction, realizing the effect of converting the corresponding axial input into radial output. In addition, a limiting step 16 is provided between the side of the vertical section 14 of the transfer needle 1 near the center of the disc 25 and the upper side of the horizontal section 13. The radially inner side of the limiting step 16 abuts against the radially outer sidewall of the inner ring 31 of the disc 25. The setting of the limiting step 16 ensures that there is a minimum gap between the vertical section 14 and the inner ring 31, ensuring that the transmission ramp 54 and the corresponding component are always in a sliding contact state.

[0068] As an optimization of this embodiment, the axial actuator 49 has a T-shaped cross-section, including an annular body 56. The top surface of the annular body 56 is provided with a sliding part 51, and the lower part is provided with a downward and radially outward transmission inclined surface 54. The top surface of the disc 25 is provided with a tie rod hole 57, and a tie rod bolt 58 is inserted into the tie rod hole 57. The lower end of the tie rod bolt 58 is screwed to the axial actuator 49. The tie rod hole 57 is provided with an annular step 59 with the stepped surface facing upward. A spring 60 in a compressed state is provided between the annular step 59 and the bolt head of the tie rod bolt 58.

[0069] Specifically, in order to realize or assist the upward movement of the axial actuator 49, a tie rod bolt 58 is provided on the axial actuator 49. The tie rod bolt 58 passes through the disc body 25, and the spring 60 is sleeved on the tie rod bolt 58. The upper and lower ends respectively abut against the bottom surface of the bolt head and the annular step 59 in the tie rod hole 57, applying an upward elastic force to the axial actuator 49. Under the combined action of the reverse thrust of the transfer pin 1, the axial actuator 49 can be driven to rise and reset.

[0070] Specific working principle: When the transfer needle 1 needs to retract, the axial actuator 49 of the retraction drive mechanism 4 moves downward, the transmission inclined plane 54 presses the vertical section 14 of the transfer needle 1, the elastic support rod 2 is compressed, and the transfer needle 1 moves radially outward. When the transfer needle 1 needs to extend, the high-pressure gas generating component stops the high-pressure input, the high-pressure gas in the slide 50 is released, the elastic force of the spring 60 pulls the axial actuator 49 upward, and at the same time, after the restraint is removed, the elastic support rod 2 returns to its original deformation, pushing the transfer needle 1 to extend radially inward.

[0071] Example 2

[0072] The working principle of this embodiment is basically the same as that of embodiment 1, except that the retraction drive mechanism 4 is different.

[0073] Specific implementation examples Figure 6-8 As shown, the retraction drive mechanism 4 includes several fan-shaped radial actuators 41 arranged in a ring. The radial actuators 41 are slidably connected to the disk body 25, which can move radially but cannot rotate circumferentially. The inner side of the vertical section 14 of the transfer needle 1 abuts against the radial actuator. The upper end of the disk body 25 is rotatably connected to an annular actuator disk 42. The actuator disk 42 has several guide grooves 43 that are inclined relative to the circumferential direction distributed circumferentially. The top of the radial actuator 41 is vertically fixed with a guide rod 44, which slides in the guide groove 43. The actuator disk 42 is connected to the rotation drive assembly and can rotate circumferentially to drive the radial actuator to push the transfer needle 1 radially outward.

[0074] Specifically, the retraction drive mechanism 4 can be realized by directly pushing the transfer needle 1 radially outward through the radial actuator 41. The radial actuator 41 is fan-shaped, and multiple radial actuators 41 form a ring to ensure that all transfer needles 1 can be effectively controlled. The radial movement of the radial actuator 41 is realized through the guide groove 43 of the actuation disk 42. The distances from the two ends of the guide groove 43 to the center of the actuation disk 42 are different. Of course, the inclination direction of all guide grooves 43 is consistent to ensure consistent control of the entry and exit of each radial actuator 41. The actuation disk 42 can reciprocate circumferentially under the drive of the rotation drive assembly. Since the radial actuator 41 cannot rotate circumferentially under the action of the corresponding structure, when the guide groove 43 rotates with the actuation disk 42, the guide rod 44 slides in the guide groove 43 along the length of the groove, so that the distance of the guide rod 44 relative to the center of the actuation disk 42 changes, thereby achieving the effect of controlling the radial movement of the radial actuator 41. To prevent uncontrollable rotation of the radial actuator 41 during movement, each radial actuator 41 is provided with two guide rods 44 along the arc length direction. The guide rods 44 and the radial actuator 41 are fixed together by bolts, which provides flexible disassembly.

[0075] In this embodiment, a top plate 33 is fixedly provided on the upper end of the disc body 25, and a radially extending limiting groove 45 is provided on the top plate 33. The guide rod 44 passes through the limiting groove 45. The actuation disc 42 has three circumferentially extending arc-shaped positioning grooves 46 distributed around it. The positioning bolt 47 passes through the positioning groove 46 and is screwed to the disc body 25. The rotation drive assembly includes a linear drive cylinder 48 whose output shaft is hinged to the actuation disc 42. The cylinder body of the linear drive cylinder 48 is hinged to the frame, and the axis of the output shaft does not pass through the center of the actuation disc 42.

[0076] Specifically, the guide rod 44 is slidably limited in the radially extending limiting groove 45, achieving the effect that the radial actuator 41 can move radially but cannot rotate circumferentially. The positioning bolt 47 passes through the positioning groove 46 on the actuator disk 42 and is connected to the disk body 25. The positioning groove 46 extends circumferentially, allowing the actuator disk 42 to rotate circumferentially with a point as the center. The length of the positioning groove 46 can also limit the rotation angle of the actuator disk 42. The rotation drive assembly can be implemented by a linear drive cylinder 48 hinged to the frame. The front end of the output shaft of the linear drive cylinder 48 is connected to the outside of the actuator disk 42, which can drive the actuator disk 42 to rotate. The hinged method allows for adaptive rotation during the pushing process.

[0077] Specific working principle: When the transfer needle 1 needs to retract, the linear drive cylinder 48 actuates, driving the actuation disk 42 to rotate. The guide groove 43 guides the guide rod 44 radially outward along the limiting groove 45. The radial actuator 41 moves radially outward, pushing the vertical section 14 of the transfer needle 1 outward, causing the transfer needle 1 to move outward. When the transfer needle 1 needs to extend, the linear drive cylinder 48 reverses its action, the radial actuator 41 moves radially inward, and the transfer needle 1 extends inward under the action of the elastic support rod 2.

[0078] Example 3

[0079] The working principle of this embodiment is basically the same as that of embodiment 1, except that the rod 23 of the transfer needle 1 is different.

[0080] Specific implementation examples Figure 9 As shown, rod 23 is a straight line.

[0081] Example 4

[0082] The working principle of this embodiment is basically the same as that of embodiment 1, except that the elastic support rod 2 of the transfer needle 1 is different.

[0083] Specific implementation examples Figure 10 As shown, the fixed end 21 of the elastic strut 2 is connected to the lower part of the rear end of the vertical section 14.

[0084] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A transfer needle comprising a blade-like needle body (11) provided at the front end thereof with a transfer hook (12), characterized in that, The needle body (11) is connected with at least one elastic support rod (2) at the rear end, the elastic support rod (2) has an elastic tendency of making the free end (22) away from the needle body (11).

2. The transfer needle of claim 1, wherein, The fixed end (21) of the elastic support rod (2) is connected with the needle body (11), the fixed end (21) and the free end (22) are connected through an arc-shaped or straight line-shaped or broken line-shaped rod body (23), the rod body (23) has a deformation tendency of making the free end (22) away from the needle body (11).

3. The transfer needle of claim 2, wherein, The fixed end (21) is integrally connected with the needle body (11), or is welded, hinged or screwed. The side of the free end (22) away from the needle body (11) is provided with an arc-shaped contact surface (24) capable of slidingly abutting against a vertical abutting surface (36) of the transfer device.

4. The transfer needle of claim 1, wherein, The needle body (11) is L-shaped, comprising a horizontal section (13) and a vertical section (14), the transfer hook (12) is arranged at the front end of the horizontal section (13), and a positioning vertical groove (15) is further arranged on the front side of the transfer hook (12). The vertical section (14) is arranged at the rear end of the horizontal section (13), and the fixed end (21) of the elastic support rod (2) is connected with the upper part or the lower part of the rear end of the vertical section (14). The vertical section (14) and the horizontal section (13) are integrally connected, or are welded, hinged or screwed.

5. A transfer device comprising a ring-shaped disc body (25) arranged on a frame, characterized in that The inner ring (31) of the disc body (25) is uniformly provided with a plurality of radially penetrating needle grooves (35) in the circumferential direction, the transfer needle (1) of any one of claims 1-4 is slidingly connected in the needle grooves (35), the transfer hook (12) of the transfer needle (1) extends to the inner side of the inner ring (31), the free end (22) abuts against the vertical abutting surface (36) located on the inner side of the outer ring (32) of the disc body (25), has an elastic tendency of making the needle body (11) radially extend inward, and a retraction driving mechanism (4) is further arranged between the annular disc body (25) and the transfer needle (1).

6. The transfer device of claim 5, wherein, The retraction driving mechanism (4) comprises a plurality of radially actuating members (41) in the shape of a sector surrounding a circle, the radially actuating members (41) are slidingly connected on the disc body (25) and can radially move but cannot circumferentially rotate, the inner side of the vertical section (14) of the transfer needle (1) abuts against the radially actuating members (41), the upper end of the disc body (25) is rotationally connected with an annular actuating disc (42), a plurality of guide grooves (43) inclined relative to the circumferential direction are circumferentially distributed on the actuating disc (42), the top of the radially actuating members (41) is vertically fixed with a guide rod (44), the guide rod (44) slides in the guide grooves (43), the actuating disc (42) is connected with a rotation driving assembly and can circumferentially rotate to drive the radially actuating members (41) to radially push the transfer needle (1) outward.

7. The transfer device of claim 6, wherein, The upper end of the disc body (25) is fixedly provided with a top disc (33), the top disc (33) is provided with a radially extending limiting groove (45), and the guide rod (44) penetrates the limiting groove (45). The actuating disc (42) is provided with at least two circumferentially extending arc-shaped positioning grooves (46), and a positioning bolt (47) is arranged in the positioning groove (46) and is connected to the disc body (25) by screwing; The rotating driving assembly comprises a linear driving cylinder (48) which is connected to the actuating disc (42) by hinging, the cylinder body of the linear driving cylinder (48) is hinged to the frame, and the axis of the output shaft does not pass through the center of the actuating disc (42).

8. The transfer device of claim 5, wherein, The retraction driving mechanism (4) comprises an annular axial actuating member (49) which is slidably connected to the disc body (25) in a vertical movable manner and is connected to the transfer needle (1) through a transmission structure, a lifting driving structure is arranged between the axial actuating member (49) and the disc body (25) to drive the axial actuating member (49) to move downward to push the transfer needle (1) to move radially outward.

9. The transfer device of claim 8, wherein, An installation area (37) is formed between the inner ring (31) and the outer ring (32) of the disc body (25), a sliding groove (50) which extends axially and opens to the installation area (37) is arranged on the top disc (33) of the disc body (25), an annular sliding part (51) is arranged on the upper portion of the axial actuating member (49), the sliding part (51) is slidably connected to the sliding groove (50), the top portion of the sliding groove (50) is connected to an air passage (52), the air inlet (53) of the air passage (52) is connected to a high-pressure gas generating assembly, and a sliding sealing structure is arranged between the sliding part (51) and the sliding groove (50). The transmission structure comprises a transmission inclined surface (54) arranged at the lower end of the axial actuating member (49), the transmission inclined surface (54) radially outwardly and downwardly faces the vertical section (14) of the transfer needle (1), and the vertical section (14) and the transmission inclined surface (54) are slidably connected. Alternatively, the transmission structure comprises a transmission inclined surface (54) arranged at the upper end of the vertical section (14), the transmission inclined surface (54) radially inwardly and upwardly faces the lower end of the axial actuating member (49), and the transmission inclined surface (54) is slidably connected to the lower end of the axial actuating member (49).

10. The transfer device of claim 9, wherein, The axial actuating member (49) has a T-shaped cross section, comprising an annular body (56), the sliding part (51) is arranged on the top surface of the annular body (56), a downward and radially outward transmission inclined surface (54) is arranged on the lower portion of the annular body (56), a pull rod hole (57) is arranged on the top surface of the disc body (25), a pull rod bolt (58) is arranged in the pull rod hole (57), the lower end of the pull rod bolt (58) is connected to the axial actuating member (49) by screwing, a stepped annular step (59) with an upward step surface is arranged in the pull rod hole (57), and a spring (60) in a compressed state is arranged between the stepped annular step (59) and the head of the pull rod bolt (58).

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