A large circular machine on the disc heart positioning and locking structure

Abstract

The utility model relates to textile machinery technical field, concretely is a big circular machine upper disc heart positioning and locking structure, including outer ring, inner ring and angle seat, the inner wall of angle seat is equidistant and has opened diamond groove, the surface of angle seat is equidistant and has opened heat dissipation hole, and through the integration design makes angle seat bear four big functions of orientation, heat dissipation, fixed and positioning simultaneously, reduced the number of independent parts, simplified the assembly process, the equidistance distribution of diamond groove guarantees the consistency of knitting needle movement, and the uniformity of the knitted fabric surface is improved, the setting of heat dissipation hole reduces the risk of component thermal deformation, avoids the size precision attenuation due to high temperature, the combination of thread groove and positioning hole considers the connection reliability and positioning accuracy simultaneously, and provides basic guarantee for the stable operation of complete machine, the higher assembly fault tolerance of structure is endowed to the sliding connection design, is convenient for eliminating the cumulative error through fine adjustment when installing, improves overall positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of textile machinery technology, specifically to a positioning and locking structure for the upper plate of a large circular knitting machine. Background Technology

[0002] Circular knitting machines are key equipment in the knitting industry used for the mass production of cylindrical or sheet-like knitted fabrics. Their working principle involves the relative rotation of the upper platen and the cylinder, which drives the needles to move within a cam track, thus forming the yarn. In existing technologies, the positioning and locking structure of the upper platen in circular knitting machines often uses a single screw or simple pin for fixing. The spliced ​​corner brackets are prone to relative displacement due to assembly gaps, leading to deviations in the position of the needle guide grooves (such as diamond-shaped grooves), affecting the consistency of needle movement. Furthermore, when the upper platen rotates at high speed, the friction between the needles and the cams and corner brackets generates a large amount of heat. Existing structures are mostly closed or semi-closed designs with unreasonable ventilation hole layouts, easily leading to localized high temperatures and thermal deformation of components, further exacerbating positioning errors. Therefore, we propose a new positioning and locking structure for the core of the upper platen in circular knitting machines. Utility Model Content

[0003] The purpose of this utility model is to provide a positioning and locking structure for the upper plate of a large circular knitting machine. This structure solves the problems of existing positioning and locking structures for the upper plate of large circular knitting machines, which often use a single screw or simple pin for fixing. The spliced ​​corner brackets are prone to relative displacement due to assembly gaps, resulting in deviations in the position of the needle guide groove (such as the diamond groove), affecting the consistency of needle movement. At the same time, when the upper plate is running at high speed, the friction between the needle and the cam and corner brackets generates a lot of heat. Existing structures are mostly closed or semi-closed designs with unreasonable heat dissipation hole layouts, which can easily lead to local high temperatures and thermal deformation of components, further aggravating the positioning error.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A positioning and locking structure for the upper plate of a large circular knitting machine includes an outer ring, an inner ring, and a corner seat. The inner wall of the corner seat is provided with equidistant diamond-shaped grooves, the surface of the corner seat is provided with equidistant heat dissipation holes, the top of the corner seat is provided with equidistant threaded grooves, and each of the threaded grooves is threaded with an internal hexagon screw. The top of the corner seat and between two corresponding threaded grooves are provided with positioning holes.

[0005] Preferably, the inner wall of the outer ring is slidably connected to the inner ring, the inner wall of the inner ring is slidably connected to the corner bracket, the hex socket screw is used to fix the corner bracket to the inner ring, the top of the outer ring is provided with positioning grooves at equal intervals, and the outer side of the inner ring is fixedly connected with positioning blocks at equal intervals, and the positioning blocks are fixedly connected to the positioning grooves by bolts.

[0006] Preferably, each of the corner brackets has a locating pin on its top and one side of the threaded groove, and the locating pin is used for positioning and connecting the corner brackets.

[0007] Preferably, the heat dissipation holes are through-hole structures and are equidistantly distributed along the circumference of the corner seat.

[0008] Preferably, there are multiple corner brackets, which are spliced ​​together to form a ring structure.

[0009] By employing the above technical solution, this utility model provides a positioning and locking structure for the upper plate of a large circular knitting machine. It possesses at least the following beneficial effects: (1) This utility model integrates the corner seat into four functions: guiding, heat dissipation, fixing and positioning, reducing the number of independent parts and simplifying the assembly process. The equidistant distribution of the diamond grooves ensures the consistency of the needle movement and improves the uniformity of the woven fabric. The setting of heat dissipation holes reduces the risk of thermal deformation of the parts and avoids the dimensional accuracy decay caused by high temperature. The combination of threaded grooves and positioning holes takes into account both connection reliability and positioning accuracy, providing a basic guarantee for the stable operation of the whole machine. The sliding connection design gives the structure a high assembly fault tolerance rate, which makes it easy to eliminate accumulated errors through fine adjustment during installation and improve the overall positioning accuracy. The three-level fixing structure disperses the vibration load during operation through multi-node force distribution, avoiding loosening or breakage caused by stress concentration in single-point connection. The combination of internal hexagon screws and bolts not only ensures the connection strength, but also facilitates disassembly and adjustment during later maintenance, taking into account both reliability and maintainability.

[0010] (2) This utility model eliminates the gap error during corner seat splicing through the rigid positioning effect of the positioning pin, ensuring the geometric consistency of the ring structure, making the needle movement trajectory more stable, and reducing fabric defects; at the same time, the assembly sequence of fixing the positioning pin before the screw can simplify the splicing process, reduce the difficulty of manual alignment, and improve assembly efficiency; in addition, the positioning pin can also share part of the radial load, reduce the force on the screw, and extend the service life of the connecting parts; the through structure has a significantly improved heat dissipation efficiency compared with blind holes, effectively reducing the working temperature of the corner seat, avoiding the change in the size of the diamond groove due to thermal expansion and contraction, and ensuring the guiding accuracy of the needle; the equidistant distribution makes the temperature of each area of ​​the corner seat tend to be uniform, reducing the internal stress caused by temperature difference, and reducing the risk of component deformation or cracking; at the same time, the heat dissipation holes can also serve as a debris discharge channel, reducing the accumulation of fly hair and thread ends during needle movement, and further improving the operational stability.

[0011] (3) This utility model disassembles large ring parts into small corner seats through splicing design, which reduces the specification requirements of processing equipment and reduces processing difficulty and cost; the independent replacement capability of a single corner seat can reduce maintenance cost to the overall replacement time and shorten downtime maintenance time; by adjusting the number of corner seats to adapt to large circular machines of different diameters, the structure has good versatility, and there is no need to design molds separately for each specification, which improves production economy. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view schematic diagram of the present invention; Figure 3 This is a cross-sectional view of the present invention.

[0013] In the diagram: 1. Outer ring; 2. Inner ring; 3. Corner seat; 4. Positioning groove; 5. Positioning block; 6. Diamond groove; 7. Threaded groove; 8. Socket head screw; 9. Heat dissipation hole; 10. Positioning pin; 11. Positioning hole. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1 - Figure 3 As shown, this utility model provides a technical solution: Example 1 A positioning and locking structure for the upper plate of a large circular knitting machine, such as Figure 1 - Figure 3 As shown, it includes an outer ring 1, an inner ring 2, and a corner seat 3. The inner wall of the corner seat 3 is provided with rhomboid grooves 6 at equal intervals. The surface of the corner seat 3 is provided with heat dissipation holes 9 at equal intervals. The top of the corner seat 3 is provided with threaded grooves 7 at equal intervals. The inside of each threaded groove 7 is threaded with an internal hexagon screw 8. The top of the corner seat 3 and between each corresponding threaded groove 7 is provided with a positioning hole 11.

[0016] In this embodiment, the corner seat 3 serves as the core support component of the positioning and locking structure. The diamond-shaped grooves 6 equidistantly opened on its inner wall are adapted to fit the needle heel or transmission component of the circular knitting machine needle. When the needle moves, the edges of the diamond-shaped grooves can rigidly limit the needle trajectory to prevent the needle from deviating from the preset path. The heat dissipation holes 9 equidistantly distributed on the surface form an air convection channel with the interior and surrounding space of the corner seat, carrying away the heat generated by the friction of the needle and the operation of the components through airflow. The threaded groove 7 on the top and the internal hexagon screw 8 achieve detachable fixing of the corner seat 3 and the associated components through thread engagement. The screw head sinks into the groove to avoid interference with other components. The positioning hole 11, through cooperation with the external positioning component, provides a precise coordinate reference for the installation of the corner seat 3 in the whole machine, ensuring that the relative position error between it and the core components such as the needle cylinder and the cam is controlled within the design range.

[0017] Example 2 like Figure 3 As shown, the inner wall of the outer ring 1 is slidably connected to the inner ring 2, the inner wall of the inner ring 2 is slidably connected to the corner seat 3, the internal hex screw 8 is used to fix the corner seat 3 and the inner ring 2, the top of the outer ring 1 is provided with equidistant positioning grooves 4, the outer side of the inner ring 2 is fixedly connected with positioning blocks 5 at equidistant distances, and the positioning blocks 5 and the positioning grooves 4 are fixedly connected by bolts.

[0018] In this embodiment, the sliding connection between the inner wall of the outer ring 1 and the inner ring 2, and the sliding connection between the inner wall of the inner ring 2 and the corner seat 3, are all radially adjustable clearance fits, allowing the three to be finely adjusted in relative position along the circumferential direction during assembly to compensate for processing or assembly errors; the hex socket screw 8 locks the corner seat 3 and the inner ring 2 through the threaded groove 7, which can eliminate the sliding gap between the two and form a rigid connection; the positioning groove 4 of the outer ring 1 and the positioning block 5 of the inner ring 2 are concave-convex fit structures. After the bolt passes through the through hole of the positioning block and the positioning groove and is tightened, it can limit the relative displacement of the inner ring and the outer ring in the radial and axial directions, and finally form a three-level linkage fixing system of "outer ring-inner ring-corner seat".

[0019] Example 3 like Figure 3 As shown, each of the corner brackets 3 is provided with a locating pin 10 on its top and on one side of the threaded groove 7. The locating pin 10 is used for positioning and connecting the corner brackets 3.

[0020] In this embodiment, the positioning pin 10 at the top of the corner seat 3 is a cylindrical or conical structure. One end of the pin is fixed with the pin hole of the corner seat 3 by interference fit, and the other end is inserted into the corresponding pin hole of the adjacent corner seat to form a rigid insertion constraint. This constraint can limit the relative rotation and radial offset of the adjacent corner seats in the circumferential direction, and ensure that when multiple corner seats are spliced, the position of each rhomboid groove 6 and the distribution of heat dissipation holes 9 always maintain the designed equidistant relationship, so as to avoid the knitting needle jamming or uneven heat dissipation due to the misalignment of the corner seats.

[0021] Example 4 like Figure 1 - Figure 2 As shown, the heat dissipation holes 9 are through holes and are evenly distributed along the circumference of the corner seat 3.

[0022] In this embodiment, the heat dissipation hole 9 is a through structure that penetrates the inner and outer walls of the corner seat 3, which can directly conduct the heat inside the corner seat to the outside, forming a channel for "internal heat dissipation". The design of equidistant distribution along the circumference of the corner seat 3 ensures that each heat-generating area corresponding to the rhomboid groove 6 can correspond to at least one heat dissipation hole, ensuring that the heat is dispersed and discharged, and avoiding heat dissipation imbalance caused by dense or sparse local hole positions.

[0023] Example 5 like Figure 1 - Figure 3 As shown, there are multiple corner brackets 3, which are spliced ​​together to form a ring structure.

[0024] In this embodiment, multiple corner brackets 3 are spliced ​​together by the plane or tenon structure at the ends to form a ring. The curvature of a single corner bracket is adapted to the circumference of the whole machine. The splice is double-fixed by positioning pins 10 and screws to ensure the roundness of the ring structure. The number of independently processed single corner brackets can be adjusted according to the diameter specifications of different large circular knitting machines. When a corner bracket needs to be replaced due to wear or damage, only the corresponding individual needs to be disassembled, without the need for overall replacement.

[0025] In the operation of this utility model's positioning and locking structure for the upper plate of a large circular knitting machine, the corner seat 3 serves as the core load-bearing component. Its inner wall has equidistantly spaced diamond-shaped grooves 6 that fit into the needle heel or transmission components of the circular knitting machine. During needle movement, the edges of the diamond-shaped grooves rigidly limit the needle trajectory, preventing deviation from the preset path. The equidistantly distributed heat dissipation holes 9 on the surface form an air convection channel with the interior and surrounding space of the corner seat, carrying away the heat generated by needle friction and component operation through airflow. The threaded groove 7 on the top and the internal hexagonal screw 8 achieve detachable fixing of the corner seat 3 to related components through threaded engagement. The screw head sinking into the groove avoids interference with other components. The positioning hole 11, in cooperation with external positioning components, provides a precise coordinate reference for the installation of the corner seat 3 in the machine, ensuring that its relative positional error with the needle cylinder, camshaft, and other core components is controlled within the design range. The sliding connection between the inner wall of the outer ring 1 and the inner ring 2, and the sliding connection between the inner wall of the inner ring 2 and the corner seat 3, all contribute to this design. The radially adjustable clearance fit allows for slight adjustments to the relative positions of the three components during assembly to compensate for machining or assembly errors. The hex socket screw 8, through the threaded groove 7, locks the corner seat 3 and inner ring 2 together, eliminating sliding clearance and forming a rigid connection. The positioning groove 4 of the outer ring 1 and the positioning block 5 of the inner ring 2 have a convex-concave fit structure. Tightening the bolt through the through holes of the positioning block and positioning groove restricts the relative displacement of the inner and outer rings in the radial and axial directions, ultimately forming a three-level linkage fixing system of "outer ring-inner ring-corner seat". The positioning pin 10 at the top of the corner seat 3 has a cylindrical or conical structure; one end is interference-fitted with the pin hole of the corner seat 3, and the other end is inserted into the corresponding pin hole of the adjacent corner seat, forming a rigid insertion constraint. This constraint restricts the relative rotation and radial offset of adjacent corner seats in the circumferential direction, ensuring that when multiple corner seats are spliced, the positions of the rhomboid grooves 6 and the distribution of the heat dissipation holes 9 always maintain the designed equidistant relationship, avoiding needle jamming or uneven heat dissipation due to corner seat misalignment.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning and locking structure for the heart of a large circular knitting machine, comprising an outer ring (1), an inner ring (2), and a corner seat (3), characterized in that: The inner wall of the corner bracket (3) is provided with rhomboid grooves (6) at equal intervals, the surface of the corner bracket (3) is provided with heat dissipation holes (9) at equal intervals, the top of the corner bracket (3) is provided with threaded grooves (7) at equal intervals, the inside of each threaded groove (7) is threaded with an internal hexagon screw (8), and the top of the corner bracket (3) and between the corresponding two threaded grooves (7) are provided with positioning holes (11).

2. The positioning and locking structure for the upper plate of a large circular knitting machine according to claim 1, characterized in that: The inner wall of the outer ring (1) is slidably connected to the inner ring (2), the inner wall of the inner ring (2) is slidably connected to the corner seat (3), the internal hex screw (8) is used to fix the corner seat (3) and the inner ring (2), the top of the outer ring (1) is provided with positioning grooves (4) at equal intervals, the outer side of the inner ring (2) is fixedly connected with positioning blocks (5) at equal intervals, and the positioning blocks (5) and the positioning grooves (4) are fixedly connected by bolts.

3. The positioning and locking structure for the upper plate of a large circular knitting machine according to claim 1, characterized in that: The corner bracket (3) is provided with a positioning pin (10) on the top and on one side of the threaded groove (7), and the positioning pin (10) is used for positioning connection between the corner brackets (3).

4. The positioning and locking structure for the upper plate of a large circular knitting machine according to claim 1, characterized in that: The heat dissipation holes (9) are through holes and are evenly distributed along the circumference of the corner seat (3).

5. The positioning and locking structure for the upper plate of a large circular knitting machine according to claim 1, characterized in that: The number of the corner brackets (3) is multiple, and the multiple corner brackets (3) are spliced ​​together to form a ring structure.

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