Needle selection mechanism of flat knitting machine and flat knitting machine

Abstract

The utility model discloses a needle selection mechanism of a flat knitting machine and the flat knitting machine, belongs to the field of flat knitting machines, solves the problem that the moving process of a knitting needle assembly is complex, and adopts the technical scheme that the needle selection mechanism mainly comprises a triangular bottom plate, the knitting needle assembly comprises a knitting needle, an auxiliary stitch and a needle selection stitch, and a needle selector is arranged on the triangular bottom plate. The triangular bottom plate is connected with a needle pushing triangle, a loop pre-receiving triangle and a needle pre-selecting triangle, the needle pre-selecting triangle is provided with a first position and a second position, the auxiliary stitch is provided with an initial position, a pre-selecting position, a knitting position and a doubling stitch position, and in a direct selecting state, the needle pre-selecting triangle is located at the second position; the needle pushing triangle drives the auxiliary stitch to move from the initial position to the knitting position through the needle selecting stitch; in the pre-selection state, the needle pushing triangle drives the auxiliary stitches to move from the pre-selection position to the knitting position through the needle selecting feet, and the loop pre-connection triangle drives part of the auxiliary stitches to move from the pre-selection position to the tucking position. The knitting needle assembly is mainly used for simplifying the moving process of the knitting needle assembly.

Description

Technical Field

[0001] The utility model discloses a needle selection mechanism and a knitting flat knitting machine of a knitting flat knitting machine, belonging to the technical field of knitting flat knitting machines. Background Art

[0002] The knitting flat knitting machine realizes actions such as yarn laying, closing, looping, yarn bending, loop doffing and looping through the regular lifting movement of the knitting needles, so as to complete the knitting of the fabric. During the upward movement of the knitting needles, the coils gradually withdraw from the needle hooks, open the needle tongues, and then withdraw from the needle tongues and hang on the needle bars. During the downward movement of the knitting needles, the needle hooks hook the newly placed yarn, pull and bend it into coils, and at the same time the original coils are removed from the needle hooks, and the new coils pass through the old coils and are connected in series with the old coils. Multiple coil strings knitted by numerous knitting needles are interconnected to form a knitted fabric.

[0003] A needle selection mechanism is disclosed in the prior art CN118257055A, which includes a triangular base plate and a knitting needle assembly. Among them, a left needle selection lower retaining mountain and a needle cleaning triangle are provided on the triangular base plate. The knitting needle assembly includes an auxiliary needle foot and a needle selection foot. When the needle selection mechanism is in the direct selection state, the needle cleaning triangle extends out of the triangular base plate. When the knitting needle assembly moves relative to the triangular base plate, the needle selection foot moves from the initial position to the pre-selection position under the action of the left needle selection lower retaining mountain. At the same time, the needle selection foot pushes the auxiliary needle foot to move to the pre-selection position. Then the needle selection foot returns to the initial position under the action of the left needle selection upper retaining mountain, and the auxiliary needle foot returns to the initial position under the action of the left needle cleaning triangle. After the needle selection foot and the auxiliary needle foot both return to the initial position, the selector can select the needle selection foot, and at the same time, some auxiliary needle feet can be avoided from avoiding the pre-looping triangle, restricting the needle selection foot to reach the tuck position.

[0004] However, the process of the needle selection foot and the auxiliary needle foot moving from the initial position to the pre-selection position in the above patent is an ineffective movement. In the direct selection state, it is not necessary to make the needle selection foot and the auxiliary needle foot reach the pre-selection position. Therefore, it is also necessary to use the needle cleaning triangle to return the auxiliary needle foot to its original position, which makes the movement process of the knitting needle assembly more complicated. At the same time, the increase in ineffective movement will increase the risk of damage to the knitting needle assembly; in addition, the setting of the needle cleaning triangle will also make the overall structure of the triangular base plate more complicated and increase the manufacturing cost of the triangular base plate. Summary of the Invention

[0005] The purpose of the utility model is to solve the problems that the movement process of the knitting needle assembly is relatively complicated and the structure of the triangular base plate is relatively complicated. Therefore, a needle selection mechanism and a knitting flat knitting machine of a knitting flat knitting machine are provided, which can simplify the movement process of the knitting needle assembly.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A needle selection mechanism for a knitting flat knitting machine, comprising a triangular base plate for guiding the movement of the knitting needle assembly. The knitting needle assembly includes knitting needles, auxiliary needle feet, and needle selection feet. A needle selector cooperating with the needle selection feet is provided on the triangular base plate. A pushing needle triangle, a pre-looping triangle, and a pre-needle selection triangle are movably connected to the triangular base plate. The pre-needle selection triangle has a first position protruding from the triangular base plate and a second position retracted into the triangular base plate. The auxiliary needle feet have an initial position, a pre-selection position, a knitting position, and a tucking position. The pre-looping triangle is used to guide the auxiliary needle feet in the pre-selection position to the tucking position. The needle selection mechanism has a direct selection state and a pre-selection state. In the direct selection state, the pre-needle selection triangle is in the second position, the pre-needle selection triangle does not contact the needle selection feet, and the pushing needle triangle drives some of the auxiliary needle feet to move from the initial position to the knitting position through the needle selection feet. In the pre-selection state, the pre-needle selection triangle is in the first position and drives some of the auxiliary needle feet to move from the initial position to the pre-selection position through the needle selection feet, the pushing needle triangle drives some of the auxiliary needle feet to move from the pre-selection position to the knitting position through the needle selection feet, and the pre-looping triangle drives some of the auxiliary needle feet to move from the pre-selection position to the tucking position.

[0008] The beneficial effects of adopting the present utility model are as follows:

[0009] When the needle selection mechanism in the present utility model is in the direct selection state, the pre-needle selection triangle is in the second position, that is, the pre-needle selection triangle is retracted into the triangular base plate. When the needle selection feet move to the position of the pre-needle selection triangle, the needle selection feet will not contact the pre-needle selection triangle. Therefore, the needle selection feet will not move from the initial position to the pre-selection position. Similarly, the auxiliary needle feet can also remain in the initial position, enabling the auxiliary needle feet to avoid the pre-looping triangle and preventing the auxiliary needle feet from moving to the tucking position. The pushing needle triangle drives some of the auxiliary needle feet to move from the initial position to the knitting position through the needle selection feet. In the direct selection state, controlling the pre-needle selection triangle to avoid the needle selection feet can prevent the needle selection feet and the auxiliary needle feet from moving to the pre-selection position, eliminating the ineffective movement of the needle selection feet and the auxiliary needle feet, thereby simplifying the movement process of the needle selection feet and the auxiliary needle feet. At the same time, it can also reduce the number of collisions between the knitting needle assembly and the triangular base plate and reduce the possibility of damage to the knitting needle assembly. In addition, reducing the ineffective movement of the knitting needle assembly can also prevent the knitting needle assembly from malfunctioning between the initial position and the pre-selection position, improving the operating stability of the needle selection mechanism. Secondly, since the auxiliary needle feet remain in the initial position, there is no need to provide a cleaning needle triangle to return the auxiliary needle feet, which can simplify the overall structure of the triangular base plate and reduce the manufacturing cost of the triangular base plate.

[0010] Preferably, a needle selection needle track is provided on the triangular base plate. The needle selection needle track includes an upper needle track and a lower needle track. The needle selector is located between the upper needle track and the lower needle track. The pre-needle selection triangle and the pushing needle triangle are located in the lower needle track.

[0011] Preferably, both sides of the preselecting needle cam are provided with needle-raising surfaces. The tops of the two needle-raising surfaces are connected, and the bottoms of the two needle-raising surfaces extend towards both sides of the preselecting needle cam respectively. The needle-raising surfaces act on the selecting needle feet to drive the auxiliary needle feet to move from the initial position to the preselected position.

[0012] Preferably, the lower needle track is provided with protrusions on both sides of the preselecting needle cam. The top of the protrusion is higher than the bottom of the needle-raising surface. When the selecting needle foot moves over the protrusion to the preselecting needle cam, the selecting needle foot is between the top and the bottom of the needle-raising surface. With the foregoing technical solution, the protrusion can guide the selecting needle foot to move onto the needle-raising surface, preventing the selecting needle foot from contacting the bottom of the needle-raising surface during movement and causing the selecting needle foot to get stuck, making the movement of the selecting needle foot smoother and more comfortable, and improving the stability of the operation of the needle selection mechanism.

[0013] Preferably, the cam base plate is provided with an auxiliary needle track for guiding the movement of the auxiliary needle feet. The auxiliary needle track is provided with a needle-raising cam assembly. The needle-raising cam assembly includes a left needle-raising cam and a pre-looping cam. The left needle-raising cam guides the auxiliary needle feet in the knitting position to move.

[0014] Preferably, the cam base plate has a transverse direction and a longitudinal direction that are perpendicular to each other. The auxiliary needle track is laid along the transverse direction. The left needle-raising cam has a needle-raising entrance for the auxiliary needle feet to enter. The needle-raising entrance is higher than the preselected position of the auxiliary needle feet in the longitudinal direction.

[0015] Preferably, the pre-looping cam has a looping entrance. The looping entrance is higher than the initial position of the auxiliary needle feet and lower than the preselected position of the auxiliary needle feet in the longitudinal direction.

[0016] Preferably, the needle-raising cam assembly further includes a left needle-connecting cam, a right needle-connecting cam, and a right needle-raising cam. The left needle-raising cam and the right needle-raising cam are symmetrically arranged on both sides of the pre-looping cam. The left needle-connecting cam and the right needle-connecting cam are symmetrically arranged on both sides of the pre-looping cam, and the left needle-connecting cam and the right needle-connecting cam are between the left needle-raising cam and the right needle-raising cam.

[0017] The present utility model also discloses a flat knitting machine, including a needle selection mechanism and a knitting needle assembly. The needle selection mechanism adopts the needle selection mechanism of a flat knitting machine as described in any one of the above.

[0018] Other features and advantages of the present utility model will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following further describes the present utility model with reference to the drawings:

[0020] Figure 1 FIG. 30 is the front view of the cam base plate in the first embodiment of the present utility model;

[0021] Figure 2 is Figure 1 a partial enlarged view of part A in

[0022] Figure 3 a schematic diagram when the machine head moves to the left in the direct selection state in the first embodiment of the present utility model;

[0023] Figure 4 a schematic diagram when the machine head moves to the right in the preselection state in the first embodiment of the present utility model;

[0024] Figure 5 a schematic diagram when the machine head moves to the left in the preselection state in the first embodiment of the present utility model;

[0025] Figure 6 a cross-sectional view when the direct selection return guide block is in the working position in the first embodiment of the present utility model;

[0026] Figure 7 a cross-sectional view when the direct selection return guide block is in the avoidance position in the first embodiment of the present utility model.

[0027] Reference numerals: 1, triangular bottom plate; 111, left retaining mountain; 112, middle retaining mountain; 114, left starting needle triangle; 115, right starting needle triangle; 116, left connecting loop triangle; 117, right connecting loop triangle; 118, pre-connecting loop triangle; 121, left needle selection upper mountain; 122, middle needle selection upper mountain; 124, needle selection mountain; 131, pre-needle selection triangle; 1311, starting needle surface; 1312, bottom end; 1313, top end; 132, middle needle selection lower mountain; 141, left needle pushing triangle; 142, right needle pushing triangle; 15, direct selection return guide block; 151, first convex block; 153, first channel; 16, preselection return guide block; 17, needle selector; 181, protrusion; 2, knitting needle assembly; 21, needle selection foot; 211, first needle heel; 2111, first movement route; 212, second needle heel; 2121, second movement route; 213, needle tail; 22, auxiliary needle foot; 221, third needle heel; 2211, third movement route. Detailed implementation manners

[0028] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise clearly defined.

[0031] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Embodiment

[0032] Such as Figures 1 to 7As shown in the figure, this embodiment shows a needle selection mechanism of a flat knitting machine, which includes a triangular base plate 1 for guiding the movement of the knitting needle assembly 2. The knitting needle assembly 2 includes knitting needles, auxiliary needle feet 22 and needle selection feet 21. A needle selector 17 cooperating with the needle selection feet 21 is provided on the triangular base plate 1. A push needle triangle, a pre-loop triangle 118 and a pre-needle selection triangle 131 are movably connected to the triangular base plate 1. The pre-needle selection triangle 131 has a first position protruding from the triangular base plate 1 and a second position retracted into the triangular base plate 1. The auxiliary needle feet 22 have an initial position, a pre-selection position, a knitting position and a tucking position. The pre-loop triangle 118 is used to guide the auxiliary needle feet 22 in the pre-selection position to the tucking position. The needle selection mechanism has a direct selection state and a pre-selection state. In the direct selection state, the pre-needle selection triangle 131 is in the second position, and the pre-needle selection triangle 131 does not contact the needle selection feet 21. The push needle triangle drives some of the auxiliary needle feet 22 to move from the initial position to the knitting position through the needle selection feet 21. In the pre-selection state, the pre-needle selection triangle 131 is in the first position and drives some of the auxiliary needle feet 22 to move from the initial position to the pre-selection position through the needle selection feet. The push needle triangle drives some of the auxiliary needle feet 22 to move from the pre-selection position to the knitting position through the needle selection feet 21, and the pre-loop triangle 118 drives some of the auxiliary needle feet 22 to move from the pre-selection position to the tucking position.

[0033] When the needle selection mechanism in this embodiment is in the direct selection state, the pre-needle selection triangle 131 is in the second position, that is, the pre-needle selection triangle 131 is retracted into the triangular base plate 1. When the needle selection feet 21 move to the position of the pre-needle selection triangle 131, the needle selection feet 21 will not contact the pre-needle selection triangle 131. Therefore, the needle selection feet 21 will not move from the initial position to the pre-selection position. Similarly, the auxiliary needle feet 22 can also be kept in the initial position, so that the auxiliary needle feet 22 can avoid the pre-loop triangle 118 and prevent the auxiliary needle feet 22 from moving to the tucking position. The push needle triangle drives some of the auxiliary needle feet 22 to move from the initial position to the knitting position through the needle selection feet 21. In the direct selection state, controlling the pre-needle selection triangle 131 to avoid the needle selection feet 21 can prevent the needle selection feet 21 and the auxiliary needle feet 22 from moving to the pre-selection position, eliminating the ineffective movement of the needle selection feet 21 and the auxiliary needle feet 22, thereby simplifying the movement process of the needle selection feet 21 and the auxiliary needle feet 22. At the same time, it can also reduce the number of collisions between the knitting needle assembly 2 and the triangular base plate 1 and reduce the possibility of damage to the knitting needle assembly 2. In addition, reducing the ineffective movement of the knitting needle assembly 2 can also prevent the knitting needle assembly 2 from malfunctioning between the initial position and the pre-selection position, improving the running stability of the needle selection mechanism. Secondly, if the auxiliary needle feet 22 are kept in the initial position, there is no need to set a cleaning triangle to return the auxiliary needle feet 22, which can simplify the overall structure of the triangular base plate 1 and also reduce the manufacturing cost of the triangular base plate 1.

[0034] As Figure 1As shown, in this embodiment, the triangular base plate 1 has a longitudinal direction and a transverse direction, where the transverse direction is the same as the length direction of the triangular base plate 1. The selecting needle foot 21 includes a needle tail 213, a first needle heel 211, and a second needle heel 212. The auxiliary needle foot 22 includes a third needle heel 221. The selecting needle foot 21 and the auxiliary needle foot 22 are distributed along the longitudinal direction of the triangular base plate 1, where the first needle heel 211 is close to the auxiliary needle foot 22. On the triangular base plate 1, there are auxiliary needle channels and selecting needle channels distributed along the transverse direction. The selecting needle channels include an upper needle channel and a lower needle channel, and the upper needle channel is between the auxiliary needle channel and the lower needle channel. The first needle heel 211 of the selecting needle foot 21 moves along the upper needle channel and forms a first movement route 2111, the second needle heel 212 of the selecting needle foot 21 moves along the lower needle channel and forms a second movement route 2121, and the third needle heel 221 of the auxiliary needle channel moves along the auxiliary needle channel and forms a third movement route 2211.

[0035] As Figure 1 shown, in this embodiment, the following needle channels are successively provided with a direct selection return guide block 15, a preselecting needle triangle 131, a left pushing needle triangle 141, a preselection return guide block 16, a right pushing needle triangle 142, and a middle selecting needle lower guard mountain 132 from left to right. The direct selection return guide block 15 and the preselecting needle triangle 131 are both movably connected to the triangular base plate 1. A driving mechanism is provided on the triangular base plate 1, and the driving mechanism is in transmission connection with the preselecting needle triangle 131 and the direct selection return guide block 15 through a transmission mechanism. The driving mechanism drives the preselecting needle triangle 131 and the direct selection return guide block 15 to perform reciprocating motion along the vertical direction of the triangular base plate 1.

[0036] As Figure 6 and Figure 7 shown, in this embodiment, there is a first channel 153 for the needle tail 213 of the selecting needle foot 21 to pass through between the direct selection return guide block 15 and the triangular base plate 1. A first convex block 151 is provided on the side of the direct selection return guide block 15 facing the triangular base plate 1. First guiding inclined surfaces for guiding the needle tail 213 are provided on both sides of the first convex block 151. The direct selection return guide block 15 has an avoidance position and a working position. When the direct selection return guide block 15 is in the working position, the distance between the direct selection return guide block 15 and the triangular base plate 1 is smaller, that is, the height of the first channel 153 is smaller. When the selecting needle foot 21 moves to the direct selection return guide block 15, the needle tail 213 contacts the first convex block 151 and deflects under the action of the first guiding inclined surface, so that the second needle heel 212 of the selecting needle foot 21 is exposed from the needle groove of the knitting needle assembly 2. When the direct selection return guide block 15 is in the avoidance position, the distance between the direct selection return guide block 15 and the triangular base plate 1 is larger, that is, the height of the first channel 153 is larger. When the selecting needle foot 21 moves to the direct selection return guide block 15, the needle tail 213 does not contact the first convex block 151.

[0037] The structure of the pre-selection return guide block 16 described in this embodiment is similar to that of the direct selection return guide block 15. The pre-selection return guide block 16 is fixed on the triangular base plate 1. A second channel for the needle tail 213 to pass through is provided between the pre-selection return guide block 16 and the triangular base plate 1. A second protrusion is provided on the side of the pre-selection return guide block 16 facing the triangular base plate 1. Second guide slopes for guiding the needle tail 213 are provided on both sides of the second protrusion. When the selected stitch 21 moves to the pre-selection return guide block 16, the needle tail 213 contacts the second protrusion and is deflected under the action of the second guide slope, so that the second needle butt 212 of the selected stitch 21 is exposed from the needle groove of the knitting needle assembly 2.

[0038] like Figure 1 and Figure 2 As shown, the preselected needle triangle 131 has a first position protruding from the triangle bottom plate 1 and a second position retracted into the triangle bottom plate 1. Both sides of the preselected needle triangle 131 are provided with needle raising surfaces 1311, and the top ends 1313 of the two needle raising surfaces 1311 are connected. The bottom ends 1312 of the two needle raising surfaces 1311 extend to both sides of the preselected needle triangle 131 respectively. When the preselected needle triangle 131 is in the first position, the preselected needle triangle 131 protrudes from the surface of the triangle bottom plate 1, and at the same time, the two needle raising surfaces 1311 of the preselected needle triangle 131 become part of the lower needle track. When the second needle butt When the second needle butt 212 moves to the preselection needle triangle 131, the second needle butt 212 contacts with the needle raising surface 1311 and moves toward the top 1313 of the preselection needle triangle 131 under the guidance of the needle raising surface 1311, so that the needle selection foot 21 is converted from the initial position to the preselection position; and when the preselection needle triangle 131 is in the second position, the preselection needle triangle 131 is retracted into the triangle bottom plate 1 as a whole, and when the second needle butt 212 moves to the preselection needle triangle 131, the second needle butt 212 does not contact with the preselection needle triangle 131, that is, the needle selection foot 21 maintains the initial position and moves.

[0039] like Figure 2 As shown, the lower needle track described in this embodiment is provided with protrusions 181 on both sides of the pre-selection triangle 131, and the top 1313 of the protrusion 181 is higher than the bottom 1312 of the needle raising surface 1311. When the needle selection pin 21 moves over the protrusion 181 to the pre-selection triangle 131, the needle selection pin 21 is between the top 1313 and the bottom 1312 of the needle raising surface 1311, and the protrusion 181 can guide the needle selection pin 21 to move to the needle raising surface 1311, avoiding the needle selection pin 21 from contacting the bottom 1312 of the needle raising surface 1311 during movement, causing the needle selection pin 21 to get stuck, so that the movement of the needle selection pin 21 is smoother and more comfortable, thereby improving the stability of the needle selection mechanism.

[0040] In this embodiment, the upper needle track is successively provided with a left selecting needle upper guard 121, a selecting needle guard 124, and a middle selecting needle upper guard 122 from left to right. During the movement of the first needle heel 211 along the upper needle track, the left selecting needle upper guard 121, the selecting needle guard 124, and the middle selecting needle upper guard 122 can all control the selecting needle foot 21 to move to the initial position through the first needle heel 211; in addition, a plurality of selecting needle devices 17 are provided on the triangular base plate 1. The selecting needle devices 17 are located between the upper needle track and the lower needle track, and one of the selecting needle devices 17 is located between the preselecting needle triangle 131 and the left needle pushing triangle 141, and another selecting needle device 17 is located between the right needle pushing triangle 142 and the middle selecting needle lower guard 132.

[0041] In this embodiment, the auxiliary needle track is successively provided with a left retaining guard 111, a needle lifting triangle assembly, and a middle retaining guard 112 from left to right. The needle lifting triangle assembly includes a left needle connecting triangle, a right needle connecting triangle, a left needle lifting triangle 114, a right needle lifting triangle 115, and a pre-loop connecting triangle 118. The left needle lifting triangle 114 and the right needle lifting triangle 115 are symmetrically arranged on both sides of the pre-loop connecting triangle 118. The left needle connecting triangle and the right needle connecting triangle are symmetrically arranged on both sides of the pre-loop connecting triangle 118, and the left needle connecting triangle and the right needle connecting triangle are located between the left needle lifting triangle 114 and the right needle lifting triangle 115; in addition, the left needle lifting triangle 114 has a needle lifting entrance for the auxiliary needle foot 22 to enter. The needle lifting entrance is higher than the preselected position of the auxiliary needle foot 22 in the longitudinal direction. The pre-loop connecting triangle 118 has a loop connecting entrance, and the loop connecting entrance is higher than the initial position of the auxiliary needle foot 22 and lower than the preselected position of the auxiliary needle foot 22 in the longitudinal direction.

[0042] In this embodiment, the selecting needle mechanism has a direct selection state and a preselection state. The auxiliary needle foot 22 has an initial position, a preselected position, a knitting position, and a tucking position. The selecting needle foot 21 also has an initial position, a preselected position, and a knitting position corresponding to the auxiliary needle foot 22. When the auxiliary needle foot 22 is in the initial position, the selecting needle foot 21 is also in the initial position, and the lower end of the auxiliary needle foot 22 abuts against the upper end of the selecting needle foot 21; when the selecting needle foot 21 moves from the initial position to the preselected position, the selecting needle foot 21 pushes the auxiliary needle foot 22 to move to the preselected position. Similarly, when the auxiliary needle foot 22 moves from the preselected position to the initial position, the auxiliary needle foot 22 pushes the selecting needle foot 21 to move to the initial position.

[0043] When the selecting needle mechanism is in the direct selection state:

[0044] Taking the knitting system on the left side of the triangular base plate 1 in this embodiment as an example, as Figure 3As shown, when the needle selection mechanism is in the direct selection state, the pre-selection needle cam 131, the right needle pushing cam 142, and the left loop connecting cam 116 are all retracted into the cam base plate 1. The direct selection return guide block 15 is in the working position. During the direct selection process, the head of the knitting flat knitting machine moves to the left, that is, the needle assembly 2 moves to the right relative to the cam base plate 1. When the needle selection foot 21 moves to the direct selection return guide block 15, the needle tail 213 of the needle selection foot 21 enters the first channel 153 and contacts the first convex block 151. Under the action of the first guiding inclined surface, the needle tail 213 deflects towards the cam base plate 1, so that the second needle heel 212 is exposed from the needle groove and contacts the lower needle path. The second needle heel 212 moves along the lower needle path. When the needle selection foot 21 moves to the pre-selection needle cam 131, since the pre-selection needle cam 131 is retracted into the cam base plate 1, the second needle heel 212 does not contact the pre-selection needle cam 131, and the second needle heel 212 passes over the pre-selection needle cam 131. At this time, both the needle selection foot 21 and the auxiliary needle foot 22 are in the initial positions. Then when the needle selection foot 21 moves to the selector 17, the selector 17 works and selects the needle selection foot 21 corresponding to the knitting needles that need to participate in knitting. The unselected needle selection feet 21 are pushed back into the needle groove under the action of the selector 17, so that the second needle heels 212 of the needle selection feet 21 are retracted into the needle groove. When the needle selection foot 21 moves to the left needle pushing cam 141, the needle selection foot 21 gradually moves in the longitudinal direction of the cam base plate 1 under the action of the needle pushing cam, so that the needle selection foot 21 moves from the initial position to the knitting position. At the same time, the needle selection foot 21 pushes the auxiliary needle foot 22 to move from the initial position to the knitting position. When the auxiliary needle foot 22 moves to the needle raising cam assembly, the auxiliary needle foot 22 enters the left needle raising cam 114 through the needle raising entrance and rises under the action of the left needle raising cam 114. At the same time, the auxiliary needle foot 22 pushes the knitting needle into the knitting state, so that the knitting needle participates in knitting. Then the auxiliary needle foot 22 returns to the initial position under the action of the middle retaining mountain 112, and the needle selection foot 21 returns to the initial position under the action of the needle selection retaining mountain 124.

[0045] In this embodiment, when the needle selection mechanism is in the direct selection state, the needle selection foot 21 and the auxiliary needle foot 22 always remain in the initial positions before moving to the selector 17, which can avoid the needle selection foot 21 and the auxiliary needle foot 22 moving to the pre-selection positions, eliminate the ineffective movements of the needle selection foot 21 and the auxiliary needle foot 22, thereby simplifying the movement process of the needle selection foot 21 and the auxiliary needle foot 22. At the same time, it can also reduce the number of collisions between the needle assembly 2 and the cam base plate 1 and reduce the possibility of damage to the needle assembly 2. In addition, reducing the ineffective movement of the needle assembly 2 can also avoid failures of the needle assembly 2 between the initial position and the pre-selection position and improve the operating stability of the needle selection mechanism. Secondly, since the auxiliary needle foot 22 remains in the initial position, there is no need to set a needle cleaning cam to return the auxiliary needle foot 22, which can simplify the overall structure of the cam base plate 1 and also reduce the manufacturing cost of the cam base plate 1.

[0046] When the needle selection mechanism is in the pre-selection state:

[0047] In this embodiment, the knitting system on the left is taken as an example. As Figure 4 shown, when the needle selection mechanism is in the pre-selection state, the left needle pushing cam 141 and the right loop receiving cam 117 retract into the cam base plate 1, the direct selection return guide block 15 is in the avoidance position, and the pre-selection needle cam 131 protrudes from the cam base plate 1. In the pre-selection state, the head of the knitting machine first moves to the right, that is, the needle assembly 2 moves to the left relative to the cam base plate 1. At the beginning, since the second needle heels 212 of the needle selection feet 21 are all in the needle grooves, the second needle heels 212 do not contact the lower needle path. The needle selection feet 21 and the auxiliary needle feet 22 move in the initial position. When the needle selection feet 21 move to the pre-selection return guide block 16, the needle tails 213 of the needle selection feet 21 enter the second channel and contact the second convex block. Under the guidance of the second guiding slope, the needle tails 213 deflect towards the cam base plate 1, so that the second needle heels 212 are exposed from the needle grooves and contact the lower needle path. The second needle heels 212 move along the lower needle path. When the needle selection feet 21 move to the needle selector 17, the needle selector 17 works and selects the needle selection feet 21 corresponding to the needles that need to participate in knitting and tucking. The other needle selection feet 21 are pushed back into the needle grooves under the action of the needle selector 17. After the needle selection feet 21 move to the pre-selection needle cam 131, the second needle heels 212 contact the needle raising surface 1311 and move towards the top 1313 of the pre-selection needle cam 131 under the action of the needle raising surface 1311, so that the needle selection feet 21 move from the initial position to the pre-selection position. The needle selection feet 21 push the auxiliary needle feet 22 to move from the initial position to the pre-selection position. At the same time, the auxiliary needle feet 22 push the needles into the pre-selection state. Then, the needle selection feet 21 return to the initial position under the action of the left needle selection upper guard mountain 121. The needle tails 213 of the needle selection feet 21 pass through the first channel 153 and do not contact the first convex block 151. The auxiliary needle feet 22 return to the initial position under the action of the left retaining guard mountain 111. The needles still remain in the pre-selection needle state.

[0048] As Figure 5As shown, when the selection needle foot 21 moves to the leftmost end of the cam base plate 1, the machine head changes to move leftward, that is, the knitting needle assembly 2 moves rightward relative to the cam base plate 1. Since the direct selection return guide block 15 is in the avoidance position, the needle tail 213 of the selection needle foot 21 passes through the first channel 153 and does not contact the first bump 151. When the selection needle foot 21 moves to the pre-selection needle cam 131, the second needle heel 212 causes the selection needle foot 21 to move to the pre-selection position under the action of the pre-selection needle cam 131. At the same time, the selection needle foot 21 pushes the auxiliary needle foot 22 to move from the initial position to the pre-selection needle position. Then, the selection needle foot 21 returns to the initial position under the action of the left selection needle upper guard 121. At this time, the auxiliary needle foot 22 and the knitting needle are still in the pre-selection needle position. Then, the selector 17 works again, selecting the selection needle foot 21 corresponding to the knitting needle that needs to participate in knitting, and the selection needle foot 21 corresponding to the knitting needle participating in tucking is pushed back into the needle groove. The auxiliary needle foot 22 corresponding to the knitting needle participating in tucking is still in the pre-selection needle position. That is, at this time, the selection needle foot 21 corresponding to the knitting needle participating in knitting moves along the lower needle path. The selected selection needle foot 21 moves from the initial position to the knitting position under the action of the left push needle cam 141, and the auxiliary needle foot 22 moves to the knitting position under the push of the selection needle foot 21. Then, the auxiliary needle foot 22 enters the left needle raising cam 114 through the needle raising entrance and rises under the action of the left needle raising cam 114. At the same time, the auxiliary needle foot 22 pushes the knitting needle into the knitting state so that the knitting needle participates in knitting. Then, the selection needle foot 21 returns to the initial position under the action of the selection needle guard 124; in addition, since the auxiliary needle foot 22 corresponding to the knitting needle participating in tucking is still in the pre-selection needle position, when the auxiliary needle foot 22 moves to the pre-looping cam 118, the auxiliary needle foot 22 enters the pre-looping cam 118 through the looping entrance and rises under the action of the pre-looping cam 118. At the same time, the auxiliary needle foot 22 pushes the knitting needle into the tucking state so that the knitting needle participates in tucking. Then, all the auxiliary needle feet 22 return to the initial position under the action of the middle retaining guard 112. Combining Figure 5 , in the third movement route 2211, the solid line trajectory is the tucking route, and the dotted line trajectory is the knitting route. Embodiment

[0049] This embodiment shows a flat knitting machine, including a selection mechanism and a knitting needle assembly 2, and the selection mechanism adopts the selection mechanism described in Embodiment 1.

[0050] As mentioned above, the above are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A needle selection mechanism for a flat knitting machine, comprising a triangular base plate for guiding the movement of a knitting needle assembly, the knitting needle assembly comprising a knitting needle, an auxiliary needle foot and a needle selection foot, a needle selector matched with the needle selection foot is provided on the triangular base plate, characterized in that: The cam is used to guide the auxiliary stitches in the preselected position to the tuck position. The needle selection mechanism has a direct selection state and a preselected state. In the direct selection state, the preselected needle cam is in the second position, the preselected needle cam is not in contact with the stitch selection foot, and the needle pusher cam drives some auxiliary stitches to move from the initial position to the knitting position through the stitch selection foot; in the preselected state, the preselected needle cam is in the first position and drives some auxiliary stitches to move from the initial position to the preselected position through three stitches, the needle pusher cam drives some auxiliary stitches to move from the preselected position to the knitting position through the stitch selection foot, and the preconnected loop cam drives some auxiliary stitches to move from the preselected position to the tuck position.

2. The needle selection mechanism of a flat knitting machine according to claim 1, characterized in that: The cam bottom plate is provided with a needle selection needle track, which includes an upper needle track and a lower needle track. The needle selector is located between the upper needle track and the lower needle track, and the pre-selection cam and the needle push cam are located in the lower needle track.

3. The needle selection mechanism of a flat knitting machine according to claim 2, characterized in that: Both sides of the preselection needle triangle are provided with needle raising surfaces, the top ends of the two needle raising surfaces are connected, and the bottom ends of the two needle raising surfaces extend to both sides of the preselection needle triangle respectively. The needle raising surfaces act on the needle selection pin to drive the auxiliary pin to move from the initial position to the preselection position.

4. The needle selection mechanism of a flat knitting machine according to claim 3, characterized in that: The lower needle track is provided with protrusions on both sides of the pre-selection needle triangle, the top of the protrusion is higher than the bottom of the needle raising surface, and when the needle selection foot moves over the protrusion to the pre-selection needle triangle, the needle selection foot is between the top and bottom of the needle raising surface.

5. The needle selection mechanism of a flat knitting machine according to claim 1, characterized in that: The triangle bottom plate is provided with an auxiliary needle track for guiding the movement of the auxiliary stitches, and a needle raising triangle assembly is provided in the auxiliary needle track. The needle raising triangle assembly includes a left needle raising triangle and a pre-loop triangle. The left needle raising triangle guides the auxiliary stitches in the knitting position to move.

6. The needle selection mechanism of a flat knitting machine according to claim 5, characterized in that: The triangular base plate has mutually perpendicular transverse and longitudinal directions, the auxiliary needle track is laid along the transverse direction, and the left needle raising triangle has a needle raising entrance for the auxiliary stitches to enter, and the needle raising entrance is higher than the preselected position of the auxiliary stitches in the longitudinal direction.

7. The needle selection mechanism of a flat knitting machine according to claim 6, characterized in that: The pre-loop cam has a loop inlet, which is higher than an initial position of the auxiliary pin and lower than a preselected position of the auxiliary pin in the longitudinal direction.

8. The needle selection mechanism of a flat knitting machine according to claim 5, characterized in that: The needle raising triangle assembly also includes a left needle connecting triangle, a right needle connecting triangle and a right needle raising triangle. The left needle raising triangle and the right needle raising triangle are symmetrically arranged on both sides of the pre-connector triangle. The left needle connecting triangle and the right needle connecting triangle are symmetrically arranged on both sides of the pre-connector triangle, and the left needle connecting triangle and the right needle raising triangle are located between the left needle raising triangle and the right needle raising triangle.

9. A flat knitting machine, comprising a needle selection mechanism and a knitting needle assembly, characterized in that: The needle selection mechanism adopts the needle selection mechanism of a knitting machine as described in any one of claims 1 to 8.

Images