A needle cylinder for a drum knitting machine

Abstract

The application discloses a needle cylinder for a large circular machine and relates to the technical field of needle cylinder for a large circular machine.The needle cylinder for a large circular machine comprises a needle cylinder body, a plurality of accommodating grooves are arranged in a circular array on the inner circumferential side of the needle cylinder body, a supporting sleeve is horizontally and rotatably arranged in the accommodating grooves, a supporting plate is arranged at the free end of the supporting sleeve, and the supporting plate can slide into the supporting sleeve.The supporting sleeve and the supporting plate are arranged on the needle cylinder body, then a plurality of supporting plates are connected with a connecting rod through a connecting assembly, so that the axis of the connecting rod is always located on the central axis of the needle cylinder body, the amplitude of up-and-down swing is small during hoisting because the shape of the needle cylinder body is regular, the possibility of the bottom of the needle cylinder body being bumped is reduced, the bottom of the needle cylinder body is not easy to bump the mounting surface of the large circular machine at the moment of rising, the polishing frequency of the flatness of the bottom of the needle cylinder body is reduced, and the service life of the needle cylinder body is prolonged.

Description

Technical Field

[0001] This invention relates to the field of syringe technology for large circular knitting machines, and specifically to a syringe for large circular knitting machines. Background Technology

[0002] The needle cylinders used in circular knitting machines are mainly used to fix and drive the knitting needles. Needle cylinders come in different numbers of needles, so the machines need to frequently change cylinders depending on the product characteristics. During cylinder changes, a crane or small gantry crane is typically used to lift the cylinder. First, the bolts securing the cylinder to the machine are loosened. After the bolts are fully loosened, the cylinder needs to be lifted. During lifting, the cylinder must be kept horizontal to prevent damage to its outer surface. Maintaining a horizontal position also facilitates placing the lifted cylinder on a temporary pallet for transport. Therefore, existing cylinders typically have at least three lifting holes on their inner circumference. Lifting rings are installed into these holes, and then the lifting rope is hooked onto the crane or small gantry crane hook. One end of the rope is then hooked onto the lifting ring. Ideally, three ropes of equal length are used, but during the lifting process… Because the lifting ropes are made of flexible material, when the position of the hook deviates from the central axis of the syringe, one of the ropes will become taut first during the lifting process. At this time, the syringe will tilt due to gravity until the other two ropes become taut. During this process, the bottom of the syringe is prone to bumping against the mounting surface. As a result, when the syringe is installed on the large circular knitting machine again, the flatness of the syringe end face will be affected during the calibration process. In actual installation, after the syringe is installed on the large circular knitting machine, the flatness runout of the top surface needs to be kept within 0.02 during the rotation process. The bottom of the syringe is easily damaged by bumps during repeated disassembly and reassembly, thus requiring frequent rework and grinding. In order to solve the problem that the bottom of the existing syringe is easily bumped during the lifting process, this invention provides a syringe for a large circular knitting machine to solve the shortcomings of the existing technology. Summary of the Invention

[0003] The purpose of this invention is to provide a syringe for a large circular knitting machine in order to solve the problems mentioned above.

[0004] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0005] A syringe for a large circular knitting machine includes a syringe body with multiple receiving slots arranged in a circular array on the inner circumference of the syringe body. A support sleeve is horizontally and rotatably installed in each receiving slot. A support plate is inserted into the free end of the support sleeve and can slide into the support sleeve. A positioning element acting on the support sleeve is installed on the syringe body. When the support sleeve rotates into the receiving slot, the positioning element causes the support plate to be released from or fixed within the support sleeve. The syringe body also includes a connecting rod with a lifting hole at its top for screwing in a lifting ring. A connecting assembly acting on the connecting rod is installed on the support plate. When one end of the multiple support plates approaches and faces the central axis of the syringe body, the connecting assembly causes the connecting rod to be connected to or disconnected from the multiple support plates.

[0006] Furthermore, the support plate is hollow inside and open at the top. The connecting assembly includes a rotating rod that is vertically and rotatably installed inside the support plate. An adjusting assembly that drives the rotating rod to rotate is installed inside the support plate. The bottom of the connecting rod has multiple L-shaped insertion rods. One side of the rotating rod has an insertion slot for inserting the insertion rods. When multiple insertion rods are respectively inserted into multiple insertion slots, the connecting rod is vertical and coaxial with the central axis of the syringe body.

[0007] Furthermore, the adjustment assembly includes a sliding block that is horizontally slidably installed in the support plate, a hinge rod that is hinged between the sliding block and the rotating rod, and a limiting assembly for releasing or limiting the sliding position of the sliding block is installed in the support plate.

[0008] Furthermore, the limiting component includes a drive rod that is vertically slidably installed in the support plate, an arc-shaped insert plate that is vertically rotatably installed in the support plate, an arc-shaped slot for inserting the arc-shaped insert plate is provided on the top of the sliding block, and a linkage that acts on the arc-shaped insert plate is installed on the drive rod. When the drive rod moves, the arc-shaped insert plate is rotated by the linkage.

[0009] Furthermore, the linkage includes a transmission rod hinged to the drive rod, one end of which is hinged to the arc-shaped insert plate.

[0010] Furthermore, it also includes a connecting sleeve fitted on the drive rod, the bottom of the connecting sleeve being connected to the support plate and having an abutment spring installed inside, the outer periphery of the drive rod having a protruding plate that fits against the inner periphery of the connecting sleeve, and the free end of the abutment spring abutting against the protruding plate.

[0011] Furthermore, a groove is provided at the bottom of the support plate, and the bottom end of the drive rod passes through the support plate and is located in the groove.

[0012] Furthermore, a plurality of guide rods are installed inside the support plate along its length direction, and the sliding block is slidably sleeved on the plurality of guide rods. A drive spring is fitted on the guide rod, one end of the drive spring abuts against one end inside the support plate, and the other end of the drive spring abuts against one end of the sliding block.

[0013] Furthermore, the positioning component includes a rotating ring coaxially rotatably mounted on the syringe body. The bottom end of the rotating ring is configured with a positioning rod in the receiving groove. The free end of the support plate is provided with a positioning hole for the positioning rod to be inserted. When the support plate is located in the support sleeve and the support plate slides into the support sleeve, the rotating ring causes multiple positioning rods to be inserted into the corresponding positioning holes respectively.

[0014] Furthermore, a paving groove is provided on the inner circumference of the rotating ring, a bolt is threaded into the inner circumference of the rotating ring, and a positioning hole for the bolt to be screwed into is provided on one side of the syringe body.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. Compared with existing technologies, this invention installs a support sleeve and a support plate on the syringe body, and then connects multiple support plates to the connecting rod through a connecting assembly. This ensures that the axis of the connecting rod is always located on the central axis of the syringe body. As a result, during the lifting process, due to the regular shape of the syringe body, the amplitude of vertical swaying is very small, reducing the possibility of the bottom of the syringe body being bumped. This makes it less likely for the bottom of the syringe body to collide with the mounting surface of the large circular knives during the moment of lifting, reducing the number of times the bottom flatness of the syringe body needs to be polished, thereby improving the service life of the syringe body.

[0017] 2. When the arc-shaped insert is inserted into the corresponding arc-shaped slot, the present invention applies a vertically oriented elastic force to the protruding plate through the anti-collision spring, thereby making it difficult for the arc-shaped insert to detach from the corresponding arc-shaped slot, thus playing a protective role and preventing the arc-shaped insert from accidentally detaching from the arc-shaped slot and causing the rotating rod to rotate accidentally.

[0018] 3. The guide rod design of this invention plays a guiding role, making it less likely for the sliding block to get stuck when moving. The design of the drive spring allows the sliding block to move when the support plate moves out of the support sleeve, by means of the elastic deformation of the drive spring, so that the operator does not need to move the sliding block manually, making it more convenient to use. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 This is the present invention. Figure 1Schematic diagram of the three-dimensional structure after the support plate is stored;

[0021] Figure 3 This is the present invention. Figure 1 Partial three-dimensional sectional view;

[0022] Figure 4 This is the present invention. Figure 3 Enlarged view of the structure at point A in the middle;

[0023] Figure 5 This is the present invention. Figure 3 Enlarged view of the structure at point B in the middle;

[0024] Figure 6 This is the present invention. Figure 1 Another partial sectional view;

[0025] Figure 7 This is the present invention. Figure 2 Partial three-dimensional sectional view;

[0026] Reference numerals: 1. Syringe body; 2. Receiving groove; 3. Support sleeve; 4. Support plate; 5. Positioning component; 501. Rotating ring; 502. Positioning rod; 503. Positioning insertion hole; 504. Positioning hole; 6. Connecting rod; 7. Lifting hole; 8. Connecting assembly; 801. Rotating rod; 802. Insertion rod; 803. Insertion groove; 9. Adjusting assembly; 901. Sliding block; 902. Hinge rod; 10. Limiting assembly; 1001. Drive rod; 1002. Groove; 1003. Arc-shaped insert plate; 1004. Arc-shaped slot; 11. Linkage component; 1101. Conducting rod; 1102. Connecting sleeve; 1103. Abutment spring; 1104. Protruding plate; 12. Guide rod; 13. Drive spring; 14. Actuating groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0028] like Figures 1-7As shown, a syringe for a large circular knitting machine includes a syringe body 1. Multiple receiving slots 2 are arranged in a circular array on the inner circumference of the syringe body 1. In this embodiment, the number of receiving slots 2 can be four. A support sleeve 3 is horizontally and rotatably installed within each receiving slot 2. That is, there are four support sleeves 3. A support plate 4 is inserted into the free end of each support sleeve 3. The support plate 4 can slide into the support sleeve 3. Specifically, one end of the support plate 4, which is always located inside the support sleeve 3, has a stop block that conforms to the inner circumferential wall of the support sleeve 3. A positioning element 5 is installed on the syringe body 1, acting on the support sleeve 3. When the support sleeve 3 rotates into the receiving slot 2, the positioning element 5 releases or fixes the support plate 4 within the support sleeve 3. In other words, when the syringe body 1 is installed on the large circular knitting machine and does not need to be lifted, the support plate 4 can be slid into the corresponding support sleeve 3, and then the support sleeve 3 can be rotated to the corresponding receiving slot 2. The rotation angle of the support sleeve 3 is then fixed by the positioning element 5, so that when the syringe body 1 rotates during operation, the support sleeve 3... It does not rotate on its own and includes a connecting rod 6. The top of the connecting rod 6 has a lifting hole 7 for screwing in a lifting ring. A connecting assembly 8 that acts on the connecting rod 6 is installed on the support plate 4. When one end of the multiple support plates 4 is close to and facing the central axis of the syringe body 1, the connecting assembly 8 connects or disconnects the connecting rod 6 from the multiple support plates 4. That is, when it is necessary to lift the syringe body 1, the multiple support sleeves 3 can be rotated so that the free end of the support sleeve 3 faces the central axis of the syringe body 1. Specifically, when the support sleeve 3 located inside the receiving groove 2 rotates to its maximum limit position, one end of the support sleeve 3 abuts against one side of the receiving groove 2, and the free end of the support sleeve 3 faces the central axis of the syringe body 1. Then, the support plate 4 is slid so that the support plate 4 moves to its maximum limit position, so that the outer end of the support plate 4 faces and is close to the central axis of the syringe body 1. Then, the multiple support plates 4 are connected to the connecting rod 6 through the connecting assembly 8. At this time, the connecting rod 6 is vertical and its central axis is coaxial with the central axis of the syringe body 1 (e.g., Figure 1As shown in the diagram, because multiple support plates 4 are connected to the connecting frame, the rotation angle of the support sleeve 3 is indirectly limited. At this time, the lifting ring can be screwed into the lifting hole 7 at the top of the connecting rod 6. At this time, a crane can be used to move the crane above the lifting ring. The hook on the crane is located directly above the lifting ring in its natural state. Then, a lifting sling can be passed through the lifting ring, and then both ends of the lifting sling are fitted onto the hook. For safety, one end of the lifting sling can be wrapped around the lifting ring once, and then both ends of the lifting sling are dragged so that the two ends of the sling are kept at the same height in a vertically upward state. Then, one end of the lifting sling is fitted onto the hook. It should be noted that the sling is an existing structure and is flat. In this embodiment, a lifting sling with a total length of one meter can be used. One side of the lifting sling is open near both ends, making it easy to hang on the hook. When the syringe body 1 needs to be lifted from the large circular knitting machine, because the overall shape of the syringe body 1 is circular, the center of gravity is located on its central axis. Therefore, when the hook rises, the syringe body 1 moves vertically upward. Because the shape of the syringe body 1 is regular, the up-and-down swaying amplitude is very small during the lifting process. When the syringe body 1 is first lifted by the hook, the staff can hold the syringe body 1, thereby further reducing the possibility of the bottom of the syringe body 1 being bumped. This makes it less likely for the bottom of the syringe body 1 to collide with the mounting surface of the large circular knitting machine at the moment of lifting, reducing the number of times the bottom flatness of the syringe body 1 needs to be polished, thereby improving the service life of the syringe body 1.

[0029] like Figure 1 , Figure 3 and Figure 4As shown, in some embodiments, the support plate 4 is hollow inside and open at the top. The connecting assembly 8 includes a rotating rod 801 that is vertically and rotatably installed inside the support plate 4. An adjusting assembly 9 that drives the rotating rod 801 to rotate is installed inside the support plate 4. The bottom of the connecting rod 6 has multiple L-shaped insertion rods 802. One side of the rotating rod 801 has an insertion slot 803 for the insertion rods 802 to be inserted. When the multiple insertion rods 802 are respectively inserted into the multiple insertion slots 803, the connecting rod 6 is vertical and coaxial with the central axis of the syringe body 1. That is, when one end of the multiple support plates 4 is facing and close to the central axis of the syringe body 1, the rotating rod 801 is vertical. 01 is still located inside the support plate 4. Then, by adjusting the component 9, multiple rotating rods 801 can be rotated to their maximum limit position outside the support plate 4. In this embodiment, there are four rotating rods 801. When the four rotating rods 801 rotate to the outside of the support plate 4, the free ends of the four rotating rods 801 enclose a rectangular closed area. Then, the top of the connecting rod 6 passes through the rectangular closed area from below, so that multiple L-shaped insertion rods 802 are respectively inserted into multiple insertion slots 803, thereby limiting the horizontal rotation angle of multiple support plates 4 and ensuring that the axis of the connecting rod 6 is coaxial with the central axis of the syringe body 1.

[0030] like Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the adjusting component 9 includes a sliding block 901 horizontally slidably mounted within the support plate 4. A hinge rod 902 is hinged between the sliding block 901 and the rotating rod 801. A limiting component 10 for releasing or limiting the sliding position of the sliding block 901 is installed within the support plate 4. That is, when the sliding block 901 is moved, the movement of the sliding block 901 causes the hinge rod 902 hinged to the sliding block 901 to move. Because one end of the hinge rod 902 is hinged to the rotating rod 801, when the sliding block 901 moves, it pulls or pushes the rotating rod 801 to rotate via the hinge rod 902. Figure 4 The diagram shows the sliding block 901 in its maximum limit position. Two limit grooves are provided on the inner wall of the support plate 4 to limit the movement of the sliding block 901. When the sliding block 901 moves closer to the corresponding rotating rod 801, the rotating rod 801 is rotated to the outside by the push of the hinge rod 902 until the sliding block 901 moves to the maximum limit position. Then, the sliding position of the sliding block 901 is limited by the limit assembly 10, thereby indirectly limiting the rotation angle of the rotating rod 801.

[0031] like Figure 1 and Figures 3-5As shown, in some embodiments, the limiting component 10 includes a drive rod 1001 vertically slidably mounted within a support plate 4. An arc-shaped insert plate 1003 is vertically rotatably mounted within the support plate 4. An arc-shaped slot 1004 for inserting the arc-shaped insert plate 1003 is provided at the top of the sliding block 901. A linkage 11 acting on the arc-shaped insert plate 1003 is mounted on the drive rod 1001. When the drive rod 1001 moves, the arc-shaped insert plate 1003 rotates through the linkage 11. That is, when... When the drive rod 1001 is pulled, the arc-shaped insert 1003 rotates via the linkage 11, causing one end of the arc-shaped insert 1003 to insert into the corresponding arc-shaped slot 1004, thus fixing the sliding position of the sliding block 901. It should be noted that when the sliding block 901 moves, causing the rotating rod 801 to rotate outwards from the support plate 4, the sliding block 901 moves to its maximum limit position, at which point the arc-shaped insert 1003 can rotate into the arc-shaped slot 1004 (e.g., ...). Figure 4 (As shown).

[0032] like Figure 1 and Figures 3-5 As shown, in some embodiments, the linkage 11 includes a transmission rod 1101 hinged to the drive rod 1001. One end of the transmission rod 1101 is hinged to the arc-shaped insert plate 1003. When the drive rod 1001 is pulled, the transmission rod 1101 will move. Since one end of the transmission rod 1101 is hinged to the arc-shaped insert plate 1003, the movement of the drive rod 1001 will cause the arc-shaped insert plate 1003 to rotate by pulling or pushing through the transmission rod 1101.

[0033] like Figure 4 As shown, in some embodiments, a connecting sleeve 1102 is also included, which is sleeved on the drive rod 1001. The bottom of the connecting sleeve 1102 is connected to the support plate 4 and an anti-spring 1103 is installed inside it. The outer periphery of the drive rod 1001 is constructed with a protruding plate 1104 that fits against the inner periphery of the connecting sleeve 1102. The free end of the anti-spring 1103 abuts against the protruding plate 1104. Due to the elastic deformation characteristic of the anti-spring 1103, when the arc-shaped insert 1003 is inserted into the corresponding arc-shaped slot 1004, the anti-spring 1103 applies a vertical elastic force to the protruding plate 1104, thereby making it difficult for the arc-shaped insert 1003 to fall out of the corresponding arc-shaped slot 1004, which plays a protective role and prevents the arc-shaped insert 1003 from accidentally falling out of the arc-shaped slot 1004 and causing the rotating rod 801 to rotate accidentally.

[0034] like Figure 4 As shown, in some embodiments, a groove 1002 is formed at the bottom of the support plate 4, and the bottom end of the drive rod 1001 passes through the support plate 4 and is located in the groove 1002, such as... Figure 4As shown, the bottom end of the drive rod 1001 is always located in the groove 1002 by the contact spring 1103, which not only makes it convenient for the staff to pull the drive rod 1001, but also does not affect the sliding of the support plate 4 into the corresponding support sleeve 3.

[0035] like Figure 4 and Figure 5 As shown, in some embodiments, multiple guide rods 12 are installed inside the support plate 4 along its length. A sliding block 901 is slidably sleeved on the multiple guide rods 12. A drive spring 13 is fitted on each guide rod 12. One end of the drive spring 13 abuts against one end inside the support plate 4, and the other end abuts against one end of the sliding block 901. That is, when the rotating rod 801 rotates into the support plate 4, the drive spring 13 is in a compressed state. When the support plate 4 slides out of the support sleeve 3 (the top surface of the support plate 4 is flush with the inner wall of the support sleeve 3), the drive spring 13 will reset due to its elastic deformation, thereby forcing the sliding block 901 to move closer to the corresponding rotating rod 801. This, through the hinge rod 902, pushes the rotating rod 801, causing one end of the rotating rod 801 to rotate to the outside. Block 901 first abuts against the arc-shaped insert plate 1003, then pulls the drive rod 1001 downward, causing the free end of the arc-shaped insert plate 1003 to rotate upward, thus not affecting the sliding block 901 to move to its maximum limit position. When the sliding block 901 moves to its maximum limit position, the drive rod 1001 is released, and the arc-shaped insert plate 1003 is inserted into the corresponding arc-shaped slot 1004 through the elastic reset of the contact spring 1103, thus completing the limitation of the sliding block 901. The design of the guide rod 12 plays a guiding role, making it less likely for the sliding block 901 to jam when moving. The design of the drive spring 13 allows the sliding block 901 to move when the support plate 4 moves out of the support sleeve 3, through the elastic deformation characteristic of the drive spring 13, thus eliminating the need for the operator to move the sliding block 901 manually, making it more convenient to use.

[0036] like Figure 1 and Figures 4-7 As shown, in some embodiments, the positioning member 5 includes a rotating ring 501 coaxially rotatably mounted on the syringe body 1. The bottom end of the rotating ring 501 is configured with a positioning rod 502 in the receiving groove 2. The free end of the support plate 4 is provided with a positioning hole 503 for the positioning rod 502 to be inserted. When the support plate 4 is located in the support sleeve 3 and the support plate 4 slides into the support sleeve 3, the rotating ring 501 causes multiple positioning rods 502 to be inserted into the corresponding positioning holes 503 respectively. When the rotating ring 501 is rotated, multiple positioning rods 502 will rotate around the central axis of the syringe body 1, thereby causing multiple positioning rods 502 to be inserted into the corresponding positioning holes 503 respectively, so as to limit the rotation angle of the support sleeve 3 housed in the receiving groove 2.

[0037] like Figure 1 and Figures 4-7 As shown, in some embodiments, a turning groove 14 is provided on the inner circumference of the rotating ring 501. The design of the turning groove 14 facilitates the rotation of the rotating ring 501. A bolt is threaded into the inner circumference of the rotating ring 501. A positioning hole 504 for screwing the bolt is provided on one side of the syringe body 1. When multiple positioning rods 502 are inserted into the corresponding positioning holes 503, the positioning hole 504 is aligned with the bolt hole on the rotating ring 501. Then, the bolt is screwed into the bolt hole, so that one end of the bolt is located in the positioning hole 504, thereby limiting the rotation angle of the rotating ring 501 and preventing the rotating ring 501 from rotating accidentally during use.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A syringe for a large circular knitting machine, characterized in that, The syringe body (1) has multiple receiving slots (2) arranged in a circular array on its inner circumference. A support sleeve (3) is horizontally and rotatably installed in the receiving slot (2). A support plate (4) is inserted into the free end of the support sleeve (3). The support plate (4) can slide into the support sleeve (3). A positioning element (5) acting on the support sleeve (3) is installed on the syringe body (1). When the support sleeve (3) rotates into the receiving slot (2), the positioning element (5) allows the support plate (4) to be released from fixation or fixed in the support sleeve (3). The syringe body (1) also includes a connecting rod (6). A lifting hole (7) for screwing in a lifting ring is opened at the top of the connecting rod (6). A connecting component (8) acting on the connecting rod (6) is installed on the support plate (4). When one end of the multiple support plates (4) approaches and faces the central axis of the syringe body (1), the connecting component (8) allows the connecting rod (6) to be connected or disconnected from the multiple support plates (4). The support plate (4) is hollow inside and open at the top. The connecting component (8) includes a rotating rod (801) that is vertically and rotatably installed inside the support plate (4). An adjusting component (9) that drives the rotating rod (801) to rotate is installed inside the support plate (4). The bottom of the connecting rod (6) is constructed with a plurality of L-shaped insertion rods (802). One side of the rotating rod (801) is provided with an insertion slot (803) for the insertion rods (802) to be inserted. When the plurality of insertion rods (802) are respectively inserted into the plurality of insertion slots (803), the connecting rod (6) is vertical and coaxial with the central axis of the syringe body (1). The adjustment component (9) includes a sliding block (901) that is horizontally slidably installed in the support plate (4), and a hinge rod (902) is hinged between the sliding block (901) and the rotating rod (801). A limiting component (10) for releasing the limit or limiting the sliding position of the sliding block (901) is installed in the support plate (4). The limiting component (10) includes a drive rod (1001) that is vertically slidably installed in the support plate (4). An arc-shaped insert plate (1003) is vertically rotatably installed in the support plate (4). An arc-shaped slot (1004) is provided on the top of the sliding block (901) for the arc-shaped insert plate (1003) to be inserted. A linkage (11) that acts on the arc-shaped insert plate (1003) is installed on the drive rod (1001). When the drive rod (1001) moves, the arc-shaped insert plate (1003) is rotated through the linkage (11). The linkage (11) includes a transmission rod (1101) hinged to the drive rod (1001), one end of which is hinged to the arc-shaped insert plate (1003); It also includes a connecting sleeve (1102) sleeved on the drive rod (1001), the bottom of the connecting sleeve (1102) is connected to the support plate (4) and an anti-spring (1103) is installed inside it, the outer periphery of the drive rod (1001) is constructed with a protruding plate (1104) that fits against the inner periphery of the connecting sleeve (1102), and the free end of the anti-spring (1103) abuts against the protruding plate (1104).

2. The syringe for a large circular knitting machine according to claim 1, characterized in that, The bottom of the support plate (4) is provided with a groove (1002), and the bottom end of the drive rod (1001) passes through the support plate (4) and is located in the groove (1002).

3. A syringe for a large circular knitting machine according to claim 2, characterized in that, Multiple guide rods (12) are installed inside the support plate (4) along its length. The sliding block (901) is slidably sleeved on the multiple guide rods (12). A drive spring (13) is sleeved on the guide rod (12). One end of the drive spring (13) abuts against one end inside the support plate (4), and the other end of the drive spring (13) abuts against one end of the sliding block (901).

4. A syringe for a large circular knitting machine according to claim 1, characterized in that, The positioning component (5) includes a rotating ring (501) coaxially rotatably mounted on the syringe body (1). The bottom end of the rotating ring (501) is configured with a positioning rod (502) in the receiving groove (2). The free end of the support plate (4) is provided with a positioning hole (503) for the positioning rod (502) to be inserted. When the support plate (4) is located in the support sleeve (3) and the support plate (4) slides into the support sleeve (3), the rotating ring (501) allows multiple positioning rods (502) to be inserted into the corresponding positioning holes (503) respectively.

5. A syringe for a large circular knitting machine according to claim 4, characterized in that, The rotating ring (501) has an actuating groove (14) on its inner circumference, and a bolt is threaded into the inner circumference of the rotating ring (501). The syringe body (1) has a positioning hole (504) on one side for the bolt to be screwed in.

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