A fixing structure of jacquard insert on a needle cylinder of a circular knitting machine

Abstract

The utility model provides a kind of jacquard patch fixing structure on knitting circular knitting machine, it is related to knitting machine technical field, needle cylinder;Jacquard piece positioning groove, multiple jacquard piece positioning grooves are set along the circumference of needle cylinder;Upper jacquard piece, the upper jacquard piece is movably set in jacquard piece positioning groove;Upper jacquard patch fixing block, the edge of upper jacquard patch fixing block is set with several interval settings installation opening along circumference;Upper jacquard patch, it is vertically installed in the installation opening;Middle extension piece, it is set on needle cylinder, and is connected with upper jacquard piece;Upper needle, it is connected with middle extension piece.The utility model has the beneficial effect that upper jacquard patch is vertically installed in the installation opening of upper jacquard patch fixing block, can effectively limit the radial wobble of upper jacquard patch in high-speed operation, avoid the trigger precision drop or the collision interference with upper jacquard piece due to side deviation, improve the stability of operation.

Description

Technical Field

[0001] This utility model relates to the field of knitting machine technology, and in particular to a fixing structure for the jacquard insert of a needle cylinder on a circular knitting machine. Background Technology

[0002] When knitting jacquard fabrics on a circular knitting machine, the jacquard insert (also known as the upper hem insert) in the upper needle cylinder is a key component for achieving pattern changes. Traditional upper jacquard inserts are mostly thin sheet structures, installed in the positioning groove of the needle cylinder by elastic elements such as springs, and operate relatively stably in low-gauge knitting with fewer than 24 needles.

[0003] However, with the increase in needle count, especially under high needle count conditions of 28 to 32 needles, the jacquard inserts themselves are relatively thin and made of soft material. During high-speed operation or frequent jacquard movements, they are prone to deformation or displacement, causing collisions between the inserts and the upper needles, the middle pressure plate, or the inner wall of the needle cylinder—a phenomenon known as "needle collision" or "jacquard insert collision." This not only affects the accuracy of the pattern and the quality of the fabric but also leads to increased equipment wear, frequent downtime for maintenance, and severely limits the jacquard capabilities and development of high-needle-count circular knitting machines.

[0004] Currently, there is no existing structural design for effectively fixing the inner diameter of jacquard inserts on high-needle-count circular knitting machines. Therefore, there is an urgent need for a fixing device that can prevent the jacquard inserts from shifting or vibrating during operation, so as to improve the stability and reliability of the jacquard system under high-needle-count conditions. Utility Model Content

[0005] This utility model overcomes the shortcomings of the prior art and provides a needle cylinder jacquard insert fixing structure for a circular knitting machine, which can overcome the technical defects mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: A jacquard insert fixing structure for a circular knitting machine includes: Insert syringe; Jacquard piece positioning grooves, a plurality of the jacquard piece positioning grooves are arranged along the circumference of the upper syringe; The upper jacquard piece is movably disposed within the jacquard piece positioning groove; The upper jacquard insert fixing block is fixedly mounted on the upper syringe, and the edge of the upper jacquard insert fixing block has several spaced mounting openings along the circumferential direction. The upper jacquard insert is vertically installed within the mounting opening; The middle extension plate is disposed on the upper syringe and connected to the upper jacquard plate; The upper knitting needle is connected to the middle extension piece, which is used to transmit the movement of the upper jacquard piece to the upper knitting needle. A spring, which is connected to the upper jacquard piece, is used to provide the upper jacquard piece with a restoring elastic force; The jacquard piece reset triangle is fixedly mounted on the upper syringe. Its working surface acts on the upper jacquard piece to guide and force the upper jacquard piece to reset.

[0007] Furthermore, it also includes a jacquard sheet floating pressure block, which is located above the upper jacquard sheet and is used to limit the upper floating limit of the upper jacquard sheet.

[0008] Furthermore, the upper jacquard insert fixing block is provided with mounting holes, and fasteners pass through the mounting holes to lock the upper jacquard insert fixing block onto the upper syringe.

[0009] Furthermore, the upper jacquard piece has a pin that can be movably inserted into the positioning groove of the jacquard piece.

[0010] Furthermore, the floating pressure block on the jacquard piece is provided with a through hole, and a bolt passes through the through hole laterally and is connected to the upper syringe; the diameter of the through hole is larger than the diameter of the bolt shaft, so that the floating pressure block on the jacquard piece has an adjustable space for vertical displacement.

[0011] Furthermore, the vertical distance from the floating pressure block on the jacquard piece to the upper jacquard piece is less than the depth to which the pins of the upper jacquard piece are inserted into the positioning groove of the jacquard piece.

[0012] Furthermore, the thickness of the upper jacquard insert matches the size of the mounting opening.

[0013] Furthermore, the mounting holes on the upper jacquard insert fixing block are countersunk holes, and the fasteners are countersunk screws.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The jacquard insert of this invention is vertically installed in the mounting opening of the jacquard insert fixing block. The jacquard insert fixing block is fixed in the upper syringe with countersunk screws. It has good stability and can effectively limit the radial shaking of the jacquard insert during high-speed operation, avoid the decrease in triggering accuracy caused by lateral deviation or collision interference with the jacquard insert, and improve the smoothness of operation. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and, together with the embodiments of the present invention, are used to explain the present invention. They do not constitute a limitation thereof. In the drawings: Figure 1 This is an overall diagram of the jacquard insert fixing structure on a circular knitting machine; Figure 2This is a schematic diagram showing the connection status of the upper jacquard piece, the middle extension piece, and the upper knitting needle; Figure 3 This is a schematic diagram showing the connection state between the upper jacquard insert fixing block and the upper jacquard insert; Figure 4 This is a top view of the upper jacquard insert fixing block; Figure 5 This is an enlarged view of the floating pressure block on the jacquard pattern.

[0016] In the picture: 1. Upper needle cylinder; 101. Jacquard piece positioning groove; 2. Upper jacquard piece; 201. Insert; 3. Upper jacquard piece fixing block; 301. Mounting opening; 302. Mounting hole; 4. Upper jacquard piece; 5. Middle extension piece; 6. Upper needle; 7. Spring; 8. Jacquard piece reset triangle; 9. Jacquard piece upper floating pressure block; 901. Perforation. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] Example 1 like Figures 1 to 5 As shown, this utility model claims protection for a jacquard insert fixing structure for the upper needle cylinder of a circular knitting machine, including an upper needle cylinder 1, a jacquard insert positioning groove 101, an upper jacquard insert 2, an upper jacquard insert fixing block 3, an upper jacquard insert 4, a middle extension piece 5, an upper knitting needle 6, a spring 7, and a jacquard insert reset triangle 8.

[0019] Among them, the upper syringe 1 serves as the mounting base for the overall structure. Multiple jacquard positioning grooves 101 are evenly provided on its outer circumferential surface. The cross-section of the jacquard positioning groove 101 is T-shaped and is used to accommodate the pins 201 of the upper jacquard 2.

[0020] In this embodiment, the upper jacquard piece 2 is made of metal by stamping, and the lower end is integrally formed with a pin 201. The pin 201 is clearance-fitted with the jacquard piece positioning groove 101 and can slide along the axial direction of the groove. A hook hole for a spring 7 is opened in the middle of the upper jacquard piece 2 for connecting one end of the spring 7. The other end of the spring 7 is connected to the inner wall boss of the needle cylinder 1 to provide a return spring force. When the upper jacquard piece 2 is pushed upward to its maximum stroke due to the knitting action, the spring force of the spring 7 pulls the upper jacquard piece 2 downward to return to the initial position, ensuring that it can repeat the reciprocating motion. The return spring force of the spring 7 on the upper jacquard piece 2 is prior art and will not be described in detail here.

[0021] The upper jacquard insert fixing block 3 is provided with a mounting hole 302. The fastener passes through the mounting hole 302 to lock the upper jacquard insert fixing block 3 onto the upper syringe 1. In this embodiment, the fastener is a countersunk screw. Therefore, the upper jacquard insert fixing block 3 is fixed to the top end face of the upper syringe 1 by passing the countersunk screw through the mounting hole 302. The edge of the upper jacquard insert fixing block 3 is provided with a number of mounting openings 301 spaced apart circumferentially. The thickness of the upper jacquard insert 4 matches the size of the mounting opening 301, so that the upper jacquard insert 4 is vertically installed in the mounting opening 301 to prevent the upper jacquard insert 4 from shifting during operation. The lower end of the insert extends above the jacquard plate positioning groove 101 to trigger the lifting and lowering action of the upper jacquard plate 2.

[0022] It also includes a middle extension piece 5 and an upper knitting needle 6. One end of the middle extension piece 5 is hinged to the upper end of the upper jacquard piece 2 via a pin, and the other end is engaged with the heel of the upper knitting needle 6. When the upper jacquard piece 2 slides along the jacquard piece positioning groove 101, the middle extension piece 5 transmits the motion to the upper knitting needle 6, driving the upper knitting needle 6 to complete the loop forming or loop gathering action.

[0023] The jacquard piece reset triangle 8 is fixed to the outer wall of the upper syringe 1 by bolts. Its working surface is an inclined arc surface. When the upper jacquard piece 2 rotates with the upper syringe 1 to the reset triangle area, the flange of the upper jacquard piece 2 contacts the arc surface, forcing the upper jacquard piece 2 to compress the spring 7 and reset along the jacquard piece positioning groove 101.

[0024] Example 2 Based on Embodiment 1, a jacquard sheet floating pressure block 9 is added. This floating pressure block 9 is located directly above the upper jacquard sheet 2, and has through holes 901 at both ends. A bolt passes horizontally through the through holes 901 and is screwed into the threaded hole of the upper syringe 1. In this embodiment, the diameter of the through hole 901 is larger than the diameter of the bolt shaft. For example, if the diameter of the through hole 901 is φ8mm, then the diameter of the bolt shaft is φ6mm, allowing the jacquard sheet floating pressure block 9 to be adjusted vertically by loosening or loosening the bolt (adjustment range 0-2mm). The vertical distance from the lower surface of the jacquard sheet floating pressure block 9 to the upper surface of the jacquard sheet is set to 3mm, which is less than the depth of the insertion of the pin 201 into the jacquard sheet positioning groove 101 (5mm), to limit the maximum upward movement of the upper jacquard sheet 2 and prevent the pin 201 from detaching from the groove.

[0025] The working process of this utility model is as follows: the upper jacquard insert 4 rotates with the upper needle cylinder 1, and its lower end contacts the trigger part of the upper jacquard insert 2, pushing the upper jacquard insert 2 upward along the jacquard insert positioning groove 101 and compressing the spring 7; the upper jacquard insert 2 drives the upper knitting needle 6 to rise through the middle extension plate 5 and participate in knitting; when the upper jacquard insert 2 rotates to the jacquard insert reset triangle 8 area, it moves downward under the arc guide of the jacquard insert reset triangle 8, and the elastic force of the spring 7 assists in reset, and the upper knitting needle 6 resets synchronously; the maximum stroke of the upper jacquard insert 2 is controlled by adjusting the up and down displacement of the upper jacquard insert floating pressure block 9 to ensure motion stability.

[0026] The upper jacquard insert 4 of this utility model is vertically installed in the mounting opening 301 of the upper jacquard insert fixing block 3. With the help of countersunk screws, the upper jacquard insert fixing block 3 is fixed in the upper syringe 1. It has good stability and can effectively limit the radial shaking of the upper jacquard insert 4 during high-speed operation, avoid the decrease in triggering accuracy caused by lateral deviation or collision interference with the upper jacquard insert 2, and improve the smoothness of operation.

[0027] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixing structure for the jacquard insert on a circular knitting machine, characterized in that, include: Insert syringe (1); Jacquard piece positioning groove (101), a plurality of the jacquard piece positioning grooves (101) are arranged circumferentially along the upper syringe (1); Upper jacquard piece (2), the upper jacquard piece (2) is movably disposed in the jacquard piece positioning groove (101); The upper jacquard insert fixing block (3) is fixedly installed on the upper syringe (1), and the edge of the upper jacquard insert fixing block (3) is provided with a number of spaced installation openings (301) along the circumferential direction. The upper jacquard insert (4) is installed in the mounting opening (301); The middle extension piece (5) is disposed on the upper syringe (1) and connected to the upper jacquard piece (2); Upper knitting needle (6) is connected to the middle extension piece (5), which is used to transmit the movement of the upper jacquard piece (2) to the upper knitting needle (6). A spring (7), which is connected to the upper jacquard piece (2), is used to provide the restoring elastic force of the upper jacquard piece (2); The jacquard piece reset triangle (8) is fixedly set on the upper syringe (1), and its working surface acts on the upper jacquard piece (2) to guide and force the upper jacquard piece (2) to reset.

2. The jacquard insert fixing structure for a circular knitting machine according to claim 1, characterized in that, It also includes a jacquard sheet floating pressure block (9), which is located above the upper jacquard sheet (2) and is used to limit the upper floating limit of the upper jacquard sheet (2).

3. The jacquard insert fixing structure for a circular knitting machine according to claim 1, characterized in that, The upper jacquard insert fixing block (3) is provided with an installation hole (302), and the fastener passes through the installation hole (302) to lock the upper jacquard insert fixing block (3) onto the upper syringe (1).

4. The jacquard insert fixing structure for a circular knitting machine according to claim 1, characterized in that, The upper jacquard piece (2) has a pin (201) that is movably inserted into the jacquard piece positioning groove (101).

5. The jacquard insert fixing structure for a circular knitting machine according to claim 2, characterized in that, The jacquard sheet floating pressure block (9) is provided with a through hole (901), and the bolt passes through the through hole (901) laterally and is connected to the upper syringe (1); the diameter of the through hole (901) is larger than the diameter of the bolt shaft, so that the jacquard sheet floating pressure block (9) has an adjustment space for vertical displacement.

6. The jacquard insert fixing structure for a circular knitting machine according to claim 5, characterized in that, The vertical distance from the upper floating pressure block (9) of the jacquard piece to the upper jacquard piece (2) is less than the depth to which the pin (201) of the upper jacquard piece (2) is inserted into the jacquard piece positioning groove (101).

7. The jacquard insert fixing structure for a circular knitting machine according to claim 1, characterized in that, The upper jacquard insert (4) is vertically installed in the mounting opening (301).

8. The jacquard insert fixing structure for a circular knitting machine according to claim 3, characterized in that, The mounting hole (302) on the upper jacquard insert fixing block (3) is a countersunk hole, and the fastener is a countersunk screw.

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