Needle push cam system of flat knitting machine

Abstract

The present invention discloses a needle push triangle system for a knitting machine, comprising a motherboard, a needle push triangle and a driving mechanism. A group of needle push triangles consists of six, which are respectively a pair of intermediate needle push triangles, a pair of main needle push triangles and a pair of auxiliary needle push triangles from the center to the sides. Each needle push triangle is composed of two opposing trapezoidal or partially trapezoidal protrusions; a first connecting rod connects and drives a pair of main needle push triangles and a pair of auxiliary needle push triangles; a second connecting rod connects and drives a pair of intermediate needle push triangles. The present invention adds an intermediate needle push triangle, which can also be understood as decomposing the main needle push triangle in the prior art into a main needle push triangle and an intermediate needle push triangle, and the intermediate needle push triangle is independently driven by the second connecting rod. Each system is also independent, so the needle push triangles of several systems do not need to maintain synchronous movement. Each system can independently adjust the downward pressure of the sinker according to the requirements of the fabric.

Description

Technical Field

[0001] The invention belongs to the technical field of knitting machinery, in particular to a needle pushing cam system of a flat knitting machine. Background Art

[0002] The needle push cam is an important component of the computerized flat knitting machine. It is used to control the forward and backward swing of the sinker so that it can be rotated open and closed relative to the needle bed mouth. When closed, it presses the fabric to help complete the knitting and needle transfer actions. It needs to be opened just before the loop is formed and the needle is connected.

[0003] The applicant has applied for a patent entitled "A Push-Pin Triangle System Suitable for Stable Pin Connection", with application number 2022101615510, which is the closest prior art to this application. The push-pin triangle system in the prior art includes a motherboard, a push-pin triangle and a drive mechanism. There are several long slots on the motherboard. The push-pin triangle is located on the front of the motherboard, and the drive mechanism is located on the back of the motherboard. The push-pin triangle is connected and driven by a connector passing through the long slots. The push-pin triangles are two pairs of four in a group, with a pair of main push-pin triangles in the middle and a pair of auxiliary push-pin triangles on both sides of the main push-pin triangle. The push-pin triangles are composed of two opposing trapezoidal or partially trapezoidal protrusions. In the case of multiple systems, for example, when there are three systems, this push-pin triangle system has three groups of twelve push-pin triangles, which are driven by the drive system. Since the three systems work synchronously, if the three systems perform transfer and knitting actions at the same time, since the push-pin triangles of the three systems are synchronized, the angles opened by the push-pin triangles are the same regardless of transfer or knitting, so the downward pressure of the sinker is the same. When knitting individual fabrics or using individual yarns, the coils of the knitting needles during transfer are easily damaged by the sinker. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects and provide a needle pushing cam system of a knitting machine that can be adjusted in different areas.

[0005] To this end, the technical solution adopted by the present invention is as follows: the needle push triangle system of the knitting machine includes a motherboard, a needle push triangle and a driving mechanism, with several needle push triangles forming a group, several long slots on the motherboard, the needle push triangle is located on the front of the motherboard, and the driving mechanism is located on the back of the motherboard, and is connected and driven by a connecting piece passing through the long slots; it is characterized in that: a group of needle push triangles consists of six, from the center to the two sides respectively, there are a pair of intermediate needle push triangles, a pair of main needle push triangles, and a pair of auxiliary needle push triangles, each needle push triangle is composed of two opposite trapezoidal or partially trapezoidal protrusions; the first connecting rod connects and drives a pair of main push needle triangles and a pair of auxiliary push needle triangles; the second connecting rod connects and drives a pair of intermediate push needle triangles, and the second connecting rod only connects and drives a pair of intermediate push needle triangles in the same group.

[0006] Furthermore, the trapezoidal protrusions on the outer side of the middle push pin triangle and the inner side of the main push pin triangle partially overlap; the thickness of the protrusions in the overlapping part is less than the thickness of the main part of the protrusion, so that the two push pin triangles are stacked and have a gap.

[0007] The first connecting rod and the second connecting rod are both provided with at least one guide groove with an oblique section. The rollers connected to each push pin triangle extend into the guide groove and move up and down perpendicular to the movement direction of the connecting rod as the first connecting rod and the second connecting rod move horizontally.

[0008] The push pin cam system includes N groups of push pin cams, a first connecting rod simultaneously drives each main push pin cam and auxiliary push pin cam in the N groups of push pin cams, and N second connecting rods respectively drive a pair of middle push pin cams in one group of push pin cams.

[0009] The second connecting rod is stacked on the first connecting rod, and the corresponding connecting piece crosses the first connecting rod and passes through the long slot hole on the motherboard to connect the middle push pin triangle.

[0010] The present invention adds an intermediate push-pin triangle, which can also be understood as decomposing the main push-pin triangle in the prior art into a main push-pin triangle and an intermediate push-pin triangle, and the intermediate push-pin triangle is independently driven by a second connecting rod. Each system is also independent, so the push-pin triangles of several systems do not need to maintain synchronous movement, and each system can independently adjust the downward pressure of the sinker according to the requirements of the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of a push-pin triangle system in the prior art.

[0012] Figure 2 It is a schematic diagram of the push-pin triangle system of the present invention.

[0013] Figure 3 It is a schematic diagram of the reverse side of the present invention.

[0014] Figure 4 It is an exploded schematic diagram of the present invention.

[0015] Figure 5 It is a schematic diagram of the main push needle triangle and the middle push needle triangle in various directions in the present invention.

[0016] Figure 6 It is a schematic diagram of the needle trajectory during knitting of the present invention.

[0017] Figure 7 It is a schematic diagram of the needle trajectory during needle transfer of the present invention.

[0018] The accompanying drawings are marked as follows: 1. Main push needle triangle left, 2. Auxiliary push needle triangle left, 3. Main push needle triangle right, 4. Auxiliary push needle triangle right, 5. Guide block, 6. Auxiliary push needle triangle left, 7. Main push needle triangle left, 8. Intermediate push needle triangle left, 9. Intermediate push needle triangle right, 10. Main push needle triangle right, 11. Auxiliary push needle triangle right, 12. Knitting needle track, 13. Transfer needle track, 14. Knitting needle, 15. Needle rod, 16. Sinker mother plate, 17. Zhongshan guide block, 18. Transfer needle triangle, 19. Guide block, 20. Second connecting rod, 21. Intermediate guide block, 22. Intermediate connecting block, 23. Guide groove, 24. Roller, 25. Rack, 27. First connecting rod, 28. Long slot hole. DETAILED DESCRIPTION

[0019] See also Figure 1 In the prior art, a group of push pin triangles consists of four, namely the main push pin triangles 1 and 3, and the auxiliary push pin triangles 2 and 4 located on both sides.

[0020] See also Figures 2 to 5 . This embodiment shows a system, that is, a group of push pin triangles. A group of push pin triangles consists of six, namely the middle push pin triangles 8 and 9, the main push pin triangles 7 and 10, and the auxiliary push pin triangles 6 and 11, which are symmetrically arranged. The main push pin triangle 7 and the middle push pin triangle 8 are taken as examples to illustrate the relationship between the two; the two are respectively composed of the upper trapezoidal block 71, the lower trapezoidal block 72 and the upper trapezoidal block 81, the lower trapezoidal block 82. The middle push pin triangle 8 is close to the main push pin triangle 7 on the left side, and the upper and lower trapezoidal blocks are respectively thinned in the direction facing the paper to form thinner parts 811 and 812, while the right side parts 812 and 822 of the upper and lower trapezoidal blocks are still normal thickness; the main push pin triangle 7 is close to the middle push pin triangle on the right side, and the upper and lower trapezoidal blocks are respectively thinned in the direction away from the paper to form thinner parts 711 and 721, while the left side is still normal thickness. 711 and 811 overlap, and 721 and 821 overlap, with a clearance between them, allowing the main push-pin triangle 7 and the intermediate push-pin triangle 8 to move relative to each other in the vertical direction. After the main push-pin triangle 7 and the intermediate push-pin triangle 8 are stacked, their thickness and width are equal to the main push-pin triangle 1 in the prior art. Therefore, this embodiment can also be understood as decomposing the original main push-pin triangle into two triangles.

[0021] The main push-pin triangles 7 and 10 and the auxiliary push-pin triangles 6 and 11 pass through the long slot holes 28 respectively, and are connected to the rollers 24 through the guide blocks 19. The rollers 24 extend into the guide slots 23 of the first connecting rod 27. When the first connecting rod 27 moves left and right, the guide slots 23 push the rollers 24 up and down, thereby driving each push-pin triangle to move up and down along the long slot holes 28. The intermediate push-pin triangles 8 and 9 also pass through the long slot holes 28 and are connected to the rollers 24 through the intermediate connecting blocks 22 and the intermediate guide blocks 21. The intermediate connecting blocks 22 and the intermediate guide blocks 21 are fixed at both ends, thereby "straddling" the first connecting rod 27 without affecting the movement of the first connecting rod. The rollers 24 extend into the guide slots 23 of the second connecting rod 20. When the second connecting rod 20 moves left and right, the guide slots 23 push the rollers 24 up and down, thereby driving the intermediate push-pin triangles 8 and 9 to move up and down along the long slot holes 28.

[0022] It should be noted that the first connecting rod in this embodiment is a longer one, only part of which is shown in the figure. If the machine has multiple systems, for example, three systems, there will be three sets of push-pin cams. The first connecting rod will connect and drive a total of 12 main and auxiliary push-pin cams in these three sets of push-pin cams. The second connecting rod is a shorter one, connected to the gear and motor via a fixed rack 25, and controls only the two middle push-pin cams in one set of push-pin cams.

[0023] See also Figure 6 、 Figure 7 In the figure, the machine head moves to the right and the knitting needles move to the left; 12a is the trajectory of the stitches on the thimble rod during knitting, and 12b is the trajectory of the stitches under the thimble rod during knitting; 13a is the trajectory of the stitches on the thimble rod during transfer, and 13b is the trajectory of the stitches under the thimble rod during transfer.

[0024] In the needle movement trajectory of the efgh segment in the figure, eh was originally the same push-pin triangle, but now it is split into the main push-pin triangle and the intermediate push-pin triangle. The main push-pin triangle at ef is still driven by the first connecting rod, and the three systems are synchronized. The intermediate push-pin triangle at gh is driven by the second connecting rod and moves independently.

Claims

1. The needle push cam system of a flat knitting machine includes a motherboard, a needle push cam, and a drive mechanism. Several needle push cams form a group. The motherboard has several long slots. The needle push cams are located on the front of the motherboard, and the drive mechanism is located on the back of the motherboard. Connectors pass through the long slots to connect and drive the needle push cams. These are characterized by: A group of push pin triangles consists of six, which are a pair of intermediate push pin triangles, a pair of main push pin triangles, and a pair of auxiliary push pin triangles from the center to the two sides. Each push pin triangle is composed of two opposing trapezoidal or partially trapezoidal protrusions; the first connecting rod connects and drives the pair of main push pin triangles and the pair of auxiliary push pin triangles; the second connecting rod connects and drives the pair of intermediate push pin triangles, and the second connecting rod only connects and drives a pair of intermediate push pin triangles in the same group.

2. The needle pushing cam system of a flat knitting machine according to claim 1, characterized in that: The protrusions on the outer side of the middle push pin triangle and the inner side of the main push pin triangle are partially overlapped; the thickness of the protrusions in the overlapping part is less than the thickness of the main part of the protrusion, so that the two push pin triangles are stacked with a gap.

3. The needle pushing cam system of a flat knitting machine according to claim 1, characterized in that: The first connecting rod and the second connecting rod are both provided with at least one guide groove with an oblique section. The rollers connected to each push pin triangle extend into the guide groove and move up and down perpendicular to the movement direction of the connecting rod as the first connecting rod and the second connecting rod move horizontally.

4. The needle pushing cam system of a flat knitting machine according to claim 1, characterized in that: The push pin cam system includes N groups of push pin cams, a first connecting rod simultaneously drives each main push pin cam and auxiliary push pin cam in the N groups of push pin cams, and N second connecting rods respectively drive a pair of middle push pin cams in one group of push pin cams.

5. The needle pushing cam system of a flat knitting machine according to claim 1, characterized in that: The second connecting rod is stacked on the first connecting rod, and the corresponding connecting piece crosses the first connecting rod and passes through the long slot hole on the motherboard to connect the middle push pin triangle.

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