A knitting density adjustment mechanism for a disc knitting machine

Abstract

This utility model relates to the field of circular knitting equipment, and in particular to a knitting density adjustment mechanism for a circular knitting machine. It mainly solves the problems of low adjustment accuracy and low adjustment efficiency of existing density adjustment mechanisms in circular knitting machines. The mechanism includes a base, a drive motor, a slider, a first presser cam, a second presser cam, a knob, and a pin. The front of the base has a groove, and the back of the base has a through hole communicating with the groove. The drive motor is located on the back of the base. The knob is located on the rotating shaft of the drive motor and distributed at the through hole. The front of the knob has a spiral track. The slider is slidably disposed within the groove. The back of the slider has a pin hole. The axial ends of the pin are respectively embedded in the pin hole and the spiral track. The first presser cam is locked onto the slider, and the second presser cam is locked onto the base and distributed below the first presser cam.

Description

Technical Field

[0001] This utility model relates to the field of disc knitting equipment, and in particular to a knitting density adjustment mechanism for a disc knitting machine. Background Technology

[0002] Circular knitting machines utilize needles to form loops from various raw materials and yarns, which are then linked together to create knitted fabrics. Circular knitting machines can produce fabrics of varying densities depending on the specific application. Current circular knitting machines typically produce a uniform knit density; adjustments are only made by stopping the machine and having the operator adjust each loop individually.

[0003] On June 12, 2024, the applicant filed a patent application entitled "A Novel Adjustable Triangular Seat," which specifically discloses a base, a mounting block, an upper fixing block, a lower fixing block, an adjusting bolt, a limiting bolt, and a first spring. The side of the base closest to the triangle is defined as the front, and the side furthest from the triangle as the back. A groove is provided along the length of the front of the base, and the mounting block is slidably disposed within the groove. The front of the mounting block, at both ends along its length, has a first stepped portion recessed. The upper and lower fixing blocks are respectively horizontally positioned on the two first stepped portions. At a stepped section, and locked to the base, the mounting block has several mounting holes arranged in a row on its front side along its length. The back of the mounting block has an adjustment groove with at least one inclined surface. The back of the base has a first threaded hole that communicates with the sliding groove. The adjusting bolt passes through the first threaded hole, with its inner end abutting against the inclined surface. A second threaded hole is located in the sliding groove on the lower side of the mounting block, and a limiting bolt is threaded into the second threaded hole. The two ends of the first spring abut against the mounting base and the limiting bolt, respectively. During adjustment, rotating the adjusting bolt inward pushes the mounting block downward, squeezing the first spring to slide, causing the triangle mounted on the mounting block to move accordingly, thereby changing the size of the woven loop and thus the fabric density.

[0004] However, the aforementioned adjustable triangular seat relies on the operator's experience for adjustment, has low adjustment accuracy, cannot achieve dynamic adjustment during the weaving process, has low adjustment efficiency, and affects production continuity. Utility Model Content

[0005] Therefore, in view of the above problems, this utility model provides a knitting density adjustment mechanism for a circular knitting machine, which mainly solves the problems of low adjustment accuracy and low adjustment efficiency of the density adjustment mechanism of the existing circular knitting machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A knitting density adjustment mechanism for a circular knitting machine includes a base, a drive motor, a slider, a first presser cam, a second presser cam, a knob, and a pin. The front of the base has a groove, and the back of the base has a through hole communicating with the groove. The drive motor is located on the back of the base. The knob is located on the rotating shaft of the drive motor and distributed at the through hole. The front of the knob has a spiral track. The slider is slidably disposed in the groove. The back of the slider has a pin hole. The two axial ends of the pin are respectively embedded in the pin hole and the spiral track. The first presser cam is locked onto the slider, and the second presser cam is locked onto the base and distributed below the first presser cam.

[0008] Furthermore, a shaft hole is provided through the central axis of the knob, and a threaded hole communicating with the shaft hole is provided on the circumferential surface of the knob along its radial direction. An annular groove is recessed in the axial center of the circumferential surface of the knob.

[0009] Furthermore, the width of the spiral track is smaller than the diameter of the pin hole.

[0010] Furthermore, the pin includes a median shaft, a first sleeve, and a second sleeve. The first sleeve and the second sleeve are rotatably fitted onto the axial ends of the median shaft via bearings. The first sleeve is embedded in a spiral track, and the second sleeve is embedded in a pin hole.

[0011] Furthermore, the second sleeve has an arc-shaped protrusion on its circumferential surface.

[0012] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This circular knitting machine knitting density adjustment mechanism, based on the knitting structure, allows the circular knitting machine to drive a drive motor via instructions from its controller. The drive motor rotates a knob, causing a pin embedded in the spiral track on the knob to move a slider up and down along a groove, thereby adjusting the distance between the first and second presser triangles on the slider. This changes the size of the knitted loops and thus the fabric density. This structure allows for adjustment during the circular knitting machine's knitting process, avoiding machine downtime for adjustments, resulting in good production continuity and improved production efficiency. Furthermore, by controlling the drive motor to rotate the knob, the rotational motion is converted into precise linear displacement of the slider, achieving stepless linear adjustment of the knitting density. This improves the accuracy and efficiency of the adjustment. Simultaneously, the integrated layout of the drive motor on the back of the base and the actuator on the front optimizes equipment space utilization while ensuring adjustment accuracy. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of the present utility model;

[0014] Figure 2 This is a partial cross-sectional view of the knob in an embodiment of this utility model;

[0015] Figure 3 This is a front view schematic diagram of the slider in an embodiment of this utility model;

[0016] Figure 4 This is a front view structural diagram of the pin shaft in an embodiment of this utility model;

[0017] Figure 5 This is a right-side view of the structure of the second sleeve in an embodiment of this utility model. Detailed Implementation

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0019] The embodiment of this utility model is as follows:

[0020] refer to Figures 1 to 5 As shown, a knitting density adjustment mechanism for a circular knitting machine includes a base 1, a drive motor 2, a slider 3, a first presser triangle 4, a second presser triangle 5, a knob 6, and a pin 7. The front of the base 1 has a groove 8, and the back of the base 1 has a through hole 9 communicating with the groove 8. The drive motor 2 is located on the back of the base 1. The knob 6 is located on the rotating shaft of the drive motor 2 and is distributed at the through hole 9. The front of the knob 6 has a spiral track 10. The slider 3 is slidably disposed in the groove 8. The back of the slider 3 has a pin hole 11. The two axial ends of the pin 7 are respectively embedded in the pin hole 11 and the spiral track 10. The first presser triangle 4 is locked onto the slider 3, and the second presser triangle 5 is locked onto the base 1 and is distributed below the first presser triangle 4. The drive motor 2 is an asynchronous motor.

[0021] This circular knitting machine's knitting density adjustment mechanism, based on the knitting structure, allows the machine to operate via a drive motor driven by its controller. The drive motor 2 rotates a knob 6, causing a pin 7 embedded in the spiral track 10 on the knob 6 to slide a slider 3 up and down along a groove 8. This adjusts the distance between the first and second presser triangles 4 and 5 on the slider 3, thereby changing the size of the knitted loops and thus the fabric density. This structure allows for adjustment during the knitting process, avoiding machine downtime and ensuring continuous production, thus improving efficiency. Furthermore, by controlling the drive motor 2 to rotate the knob 6, the rotational motion is converted into precise linear displacement of the slider 3, achieving stepless linear adjustment of the knitting density. This improves both accuracy and efficiency. The integrated layout of the drive motor 2 on the back of the base 1 and the actuator on the front optimizes space utilization while maintaining adjustment accuracy.

[0022] Furthermore, a shaft hole 12 is provided through the central axis of the knob 6, and a threaded hole 13 communicating with the shaft hole 12 is provided on the circumferential surface of the knob 6 along its radial direction. An annular groove 14 is recessed in the axial center of the circumferential surface of the knob 6. The combination design of the shaft hole 12 and the threaded hole 13 enables quick disassembly and assembly of the knob 6 and the rotation shaft of the drive motor 2. The structure of the annular groove 14 facilitates the installation of anti-loosening snap rings, significantly improving assembly efficiency. The radial threaded hole 13, together with the set screw, forms a double fixation, effectively avoiding the axial movement problem caused by traditional key connections and improving transmission stability.

[0023] In this embodiment, the width of the spiral track 10 is smaller than the diameter of the pin hole 11, forming a dynamic compensation gap of 0.05-0.1mm. This eliminates the motion jamming caused by machining errors, allows the pin 7 to deflect slightly within the track, reduces stress concentration on the contact surface, and improves the durability of the mechanism by 2.5 times.

[0024] Specifically, the pin 7 includes a median 71, a first sleeve 72, and a second sleeve 73. The first sleeve 72 and the second sleeve 73 are rotatably fitted onto the axial ends of the median 71 via bearings. The first sleeve 72 is embedded in the spiral track 10, and the second sleeve 73 is embedded in the pin hole 11. The double sleeve bearing structure reduces the coefficient of friction to below 0.02, saving 18% energy compared to the traditional integral pin. The floating connection design between the median 71 and the sleeve can automatically compensate for axial misalignment within 0.5°, ensuring the straightness of the slider 3 movement.

[0025] Furthermore, the second sleeve 73 has an arc-shaped protrusion 74 on its circumferential surface. The arc structure of the protrusion 74 forms a line contact with the pin hole 11, which can reduce friction damage and improve adjustment efficiency. In addition, the protrusion 74 generates a self-centering effect, which makes the axial positioning accuracy of the second sleeve 73 high and can eliminate the dead point problem of the single eccentric wheel.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A knitting density adjustment mechanism for a circular knitting machine, characterized in that: The device includes a base, a drive motor, a slider, a first pressure pin triangle, a second pressure pin triangle, a knob, and a pin. The front of the base has a groove, and the back of the base has a through hole communicating with the groove. The drive motor is located on the back of the base. The knob is located on the rotating shaft of the drive motor and is distributed at the through hole. The front of the knob has a spiral track. The slider is slidably disposed in the groove. The back of the slider has a pin hole. The two axial ends of the pin are respectively embedded in the pin hole and the spiral track. The first pressure pin triangle is locked to the slider, and the second pressure pin triangle is locked to the base and is distributed on the lower side of the first pressure pin triangle.

2. The knitting density adjustment mechanism for a circular knitting machine according to claim 1, characterized in that: The knob has a through hole at its central axis, and a threaded hole communicating with the through hole is provided on the circumferential surface of the knob along its radial direction. An annular groove is recessed in the axial center of the circumferential surface of the knob.

3. The knitting density adjustment mechanism for a circular knitting machine according to claim 1 or 2, characterized in that: The width of the spiral track is smaller than the diameter of the pin hole.

4. The knitting density adjustment mechanism for a circular knitting machine according to claim 3, characterized in that: The pin includes a median shaft, a first sleeve, and a second sleeve. The first sleeve and the second sleeve are rotatably fitted onto the axial ends of the median shaft via bearings. The first sleeve is embedded in a spiral track, and the second sleeve is embedded in a pin hole.

5. The knitting density adjustment mechanism for a circular knitting machine according to claim 4, characterized in that: The second sleeve has an arc-shaped protrusion on its circumferential surface.

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