CN220643420U - Flat knitting machine bottom plate structure for realizing downward pressing of butt - Google Patents

Abstract

The utility model relates to the field of flat knitting machines, and discloses a flat knitting machine bottom plate structure for realizing the downward pressing of a butt, which comprises a bottom plate (1), wherein a knitting needle track assembly, a spring needle track assembly and a needle selecting track assembly are arranged on the bottom plate (1); the mountain protection (2) is provided with a mountain protection bulge (21), the mountain protection bulge (21) is in contact fit with the connecting needle butt, the mountain guide block (11) is provided with a mountain groove (111), and the mountain guide block (11) is in contact fit with the spring needle butt. According to the utility model, by means of the push-pin mode of combining the triangular outline and the downward-pressing inclination angle, the triangular outline pushes the butt to move, the butt passes through the downward-pressing inclination angle part, the corresponding butt can be controlled to be sunk into the needle groove or sunk into the needle groove completely, the diversity of the knitting function is realized by adopting the combined knitting mode, the knitting efficiency is greatly increased, and the knitting patterns are enriched.

Description

Flat knitting machine bottom plate structure for realizing downward pressing of butt

Technical Field

The utility model relates to the field of flat knitting machines, in particular to a bottom plate structure of a flat knitting machine for realizing the downward pressing of a butt.

Background

The current common bottom plate structure realizes that the knitting needle slides in the needle groove through the contact of the triangular outline and the butt in a direct pushing mode, the method always needs the contact of the triangular outline and the butt, and only can realize the front-back translation of the knitting needle in the needle groove, and the knitting function of the bottom plate structure of the flat knitting machine is single due to the limitation of the needle moving mode, so that the knitting patterns are not rich enough, and the market demand cannot be met.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a flat knitting machine bottom plate structure for realizing the downward pressing of a butt.

In order to solve the technical problems, the utility model is solved by the following technical scheme:

the bottom plate structure of the flat knitting machine for realizing the butt pressing comprises a bottom plate, wherein a knitting needle track assembly, a spring needle track assembly and a needle selecting track assembly are arranged on the bottom plate, the knitting needle track assembly comprises a mountain protection, a density triangle and a needle turning triangle, and the spring needle track assembly comprises a butterfly mountain and a mountain guide block assembled with the butterfly mountain; the needle protecting device comprises a needle protecting rail, a needle protecting groove, a spring needle rail, a needle protecting groove, a spring needle butt, a needle protecting groove, a spring needle butt and a needle protecting groove. The butt is contacted with the triangle outline, the triangle pushes the butt to move, the butt passes through the downward pressing inclination angle part, the corresponding butt part can be controlled to sink into the needle groove or sink into the needle groove completely.

Preferably, the mountain-protecting protrusions are arranged at the lower part of the mountain-protecting portions and positioned on the knitting needle tracks, the cross sections of the mountain-protecting protrusions are triangular, the left side wall surface and the right side wall surface of the mountain-protecting protrusions are symmetrically arranged knitting needle downward-pressing inclined angle surfaces, and the included angle between the knitting needle downward-pressing inclined angle surfaces and the base surface of the bottom plate is 25-45 degrees.

Preferably, the zhongshan groove is positioned at the lower part of the zhongshan guide block, the inner walls at the left side and the right side of the zhongshan groove are symmetrically provided with eye-lifting downward-pressing inclined angle surfaces, and the included angle between the eye-lifting downward-pressing inclined angle surfaces and the base surface of the bottom plate is 30 DEG

About 40 degrees; the guide block of the Zhongshan is provided with a braiding guide groove which is an arch-shaped groove arched upwards, and the arch part of the braiding guide groove is positioned above the groove of the Zhongshan.

Preferably, the butterfly mountain is a double-arch upper guide edge with the upper edge arched upwards, the upper guide edge is matched with the lower edge of the middle mountain guide block, the left side and the right side of the upper part of the butterfly mountain are both provided with needle-receiving return needle inclined grooves connected with the upper guide edge, and the included angle between the bottom of the needle-receiving return needle inclined grooves and the base surface of the bottom plate is 25-45 degrees.

Preferably, the lower part of the butterfly mountain is provided with a butterfly mountain guide groove, the butterfly mountain guide groove is an arch-shaped groove arched upwards, the uppermost end of the butterfly mountain guide groove is provided with a notch and communicated with the upper guide edge, the notch parts at the left side and the right side of the butterfly mountain guide groove are provided with needle lifting inclined angle grooves, and the included angle between the bottom of the needle lifting inclined angle grooves and the base plane of the bottom plate is 15-30 degrees.

Preferably, the needle overturning device also comprises a pressing spring piece, wherein the pressing spring piece is positioned below the needle overturning triangle and above the Zhongshan guide block; the downward pressing elastic sheet is bent and provided with two bending bulges protruding outwards, and the bending bulges are contacted with the connecting needle butt and press the auxiliary needle into the needle groove.

Preferably, the needle selecting track assembly comprises an upper needle selecting triangle, a needle selecting mountain protecting triangle, a lower needle selecting triangle, a needle pushing triangle and a needle lifting triangle; the upper needle selecting triangle and the needle selecting protecting mountain are sequentially connected and form a first needle selecting track along the lower edge of the upper needle selecting triangle; the lower needle selecting cam, the push needle cam and the needle lifting cam are sequentially connected and form a second needle selecting track along the upper edge of the needle selecting cam; the upper needle selecting cam comprises an upper left needle selecting cam, a middle upper needle selecting cam and an upper right needle selecting cam, the lower needle selecting cam comprises a lower left needle selecting cam, a middle lower needle selecting cam and a lower right needle selecting cam, and the needle pushing cam comprises a left needle pushing cam and a right needle pushing cam.

Preferably, the mountain guard includes a left mountain guard, a middle mountain guard and a right mountain guard; the needle lifting cam is positioned below the mountain guard and comprises a left needle lifting cam, a middle needle lifting cam and a right needle lifting cam which are respectively positioned below the left mountain guard, the middle mountain guard and the right mountain guard; the spring needle track assembly further comprises a homing triangle which is positioned below the needle lifting triangle, wherein the homing triangle comprises a left homing triangle, a middle homing triangle and a right homing triangle which are distributed below the left needle lifting triangle, the middle needle lifting triangle and the right needle lifting triangle.

The density triangle comprises a left density triangle and a right density triangle which are positioned at the left and right of the needle turning triangle, and a density guide pin is arranged on the density triangle; a herringbone triangle is arranged above the needle turning triangle, and a needle turning guide block is arranged below the needle turning triangle.

The utility model has the remarkable technical effects due to the adoption of the technical scheme: according to the utility model, by means of the push-pin mode of combining the triangular outline and the downward-pressing inclination angle, the triangular outline pushes the butt to move, the butt passes through the downward-pressing inclination angle part, the corresponding butt can be controlled to be sunk into the needle groove or sunk into the needle groove completely, the diversity of the knitting function is realized by adopting the combined knitting mode, the knitting efficiency is greatly increased, and the knitting patterns are enriched.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic view of the structure of the mountain guard.

Fig. 3 is a schematic view of the structure of the guide block for the Zhongshan.

Fig. 4 is a schematic structural view of the butterfly mountain.

Fig. 5 is a schematic structural view of the pressing spring.

Fig. 6 is a state diagram of the flat knitting machine when the nonwoven function is performed.

Fig. 7 is a state diagram of the flat knitting machine when the stitch lifting function is performed.

Fig. 8 is a state diagram of the flat knitting machine when the knitting function is performed.

Fig. 9 is a state diagram of the flat knitting machine when the needle turning function is performed.

Fig. 10 is a state diagram of the flat knitting machine when the left needle joining function is performed.

Fig. 11 is a state diagram of the flat knitting machine when the right needle joining function is performed.

Fig. 12 is a state diagram of the weft knitting machine when the function of knitting the eye belt is performed.

Fig. 13 is a state diagram of the flat knitting machine when the flip function is performed.

The names of the parts indicated by the numerical references in the drawings are as follows: 1-baseboard, 2-guard, 3-needle-lifting cam, 4-homing cam, 5-density guide pin, 6-needle-lifting cam, 7-density cam, 8-herringbone cam, 9-needle-turning guide block, 10-needle-turning cam, 11-middle mountain guide block, 12-butterfly mountain, 13-upper needle-selecting cam, 14-needle-selecting guard, 15-lower needle-selecting cam, 16-push needle cam, 17-lower spring plate, 201-left needle-protecting cam, 202-middle needle-protecting cam, 203-right needle-protecting cam, 21-needle-protecting cam, 301-left needle-lifting cam, 302-middle needle-lifting cam, 303-right needle-lifting cam, 401-left homing cam 402-middle homing triangle, 403-right homing triangle, 701-left density triangle, 702-right density triangle, 111-middle mountain groove, 1111-hanging eye depression inclined plane, 112-knitting guide groove, 121-upper guide edge, 1211-needle receiving return inclined angle groove, 122-butterfly mountain guide groove, 1221-needle lifting inclined angle groove, 1301-left upper needle selecting triangle, 1302-middle upper needle selecting triangle, 1303-right upper needle selecting triangle, 1501-left lower needle selecting triangle, 1502-middle lower needle selecting triangle, 1503-right lower needle selecting triangle, 1601-left push needle triangle, 1602-right push needle triangle, and 171-bending bulge.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings and examples.

Example 1

The bottom plate structure of the flat knitting machine for realizing the butt pressing comprises a bottom plate 1, wherein a knitting needle track assembly, a spring needle track assembly and a needle selecting track assembly are arranged on the bottom plate 1, the knitting needle track assembly comprises a protecting mountain 2, a density triangle 7 and a needle turning triangle 10, and the spring needle track assembly comprises a butterfly mountain 12 and a middle mountain guide block 11 assembled with the butterfly mountain 12; the mountain protection protrusion 21 positioned on the knitting needle track is arranged on the mountain protection 2, the mountain protection protrusion 21 is in contact fit with the connecting needle butt and presses the knitting needle into the needle groove, the mountain guide block 11 is provided with the mountain groove 111 positioned on the spring needle track, and the mountain guide block 11 is in contact fit with the spring needle butt and presses the spring needle downwards to enable the spring needle to generate elastic deformation in the needle groove. The butt is contacted with the triangle outline, the triangle pushes the butt to move, the butt passes through the downward pressing inclination angle part, the corresponding butt part can be controlled to sink into the needle groove or sink into the needle groove completely.

Example 1

The same as the embodiment 1, except that the mountain-protecting protrusion 21 is disposed at the lower part of the mountain-protecting 2 and located on the needle track, the cross section of the mountain-protecting protrusion 21 is triangular, the left and right side wall surfaces of the mountain-protecting protrusion 21 are symmetrically disposed needle downward-tilting angle surfaces, and the included angle between the needle downward-tilting angle surfaces and the base surface of the base plate 1 is 35 °.

Example 2

As in embodiment 1, except that the zhongshan groove 111 is located at the lower part of the zhongshan guide block 11, the inner walls of the left and right sides of the zhongshan groove 111 are symmetrically provided with a hanging eye downward-pressing inclined angle surface 1111, and the included angle between the hanging eye downward-pressing inclined angle surface 1111 and the base surface of the base plate 1 is 35 °; the knitting guide groove 112 is provided on the mountain guide block 11, the knitting guide groove 112 is an upwardly arched groove, and an arched portion of the knitting guide groove 112 is located above the mountain groove 111.

Example 3

The same as in example 1, except that the butterfly mountain 12 is a double arch-shaped upper guide edge 121 with an upper edge arched upward, the upper guide edge 121 is matched with the lower edge of the middle mountain guide block 11, the left and right sides of the upper part of the butterfly mountain 12 are respectively provided with a needle-receiving needle return inclination angle groove 1211 connected with the upper guide edge 121, and the included angle between the bottom of the needle-receiving needle return inclination angle groove 1211 and the base surface of the base plate 1 is 35 degrees.

The lower part of the butterfly mountain 12 is provided with a butterfly mountain guide groove 122, the butterfly mountain guide groove 122 is an arch-shaped groove arched upwards, the uppermost end of the butterfly mountain guide groove 122 is provided with a notch and is communicated with the upper guide edge 121, the notch parts at the left side and the right side of the butterfly mountain guide groove 122 are provided with a needle lifting dip angle groove 1221, and the included angle between the bottom of the needle lifting dip angle groove 1221 and the base surface of the bottom plate 1 is 22.5 degrees.

Example 4

The embodiment is the same as the embodiment 1, except that the device also comprises a pressing spring piece 17, wherein the pressing spring piece 17 is positioned below the needle turning triangle 10 and above the Zhongshan guide block 11; the pressing spring plate 17 is bent and provided with two bending protrusions 171 protruding outwards, and the bending protrusions 171 are contacted with the connecting needle butt and press the auxiliary needle into the needle groove.

Example 5

The same as the embodiment 1, except that the needle selecting rail assembly comprises an upper needle selecting cam 13, a needle selecting mountain 14, a lower needle selecting cam 15, a push cam 16 and a needle lifting cam 6; the upper needle selecting triangle 13 and the needle selecting protecting mountain 14 are sequentially connected and form a first needle selecting track along the lower edge of the needle selecting triangle; the lower needle selecting cam 15, the push needle cam 16 and the needle lifting cam 6 are sequentially connected and form a second needle selecting track along the upper edge of the needle selecting cam; the upper needle selection cam 13 includes an upper left needle selection cam 1301, a middle upper needle selection cam 1302, and an upper right needle selection cam 1303, the lower needle selection cam 15 includes a lower left needle selection cam 1501, a middle lower needle selection cam 1502, and a lower right needle selection cam 1503, and the push needle cam 16 includes a left push needle cam 1601 and a right push needle cam 1602.

The mountain guard 2 comprises a left mountain guard 201, a middle mountain guard 202 and a right mountain guard 203; the needle lifting device further comprises a needle lifting triangle 3, wherein the needle lifting triangle 3 is positioned below the mountain guard 2, and the needle lifting triangle 3 comprises a left needle lifting triangle 301, a middle needle lifting triangle 302 and a right needle lifting triangle 303 which are respectively positioned below the left mountain guard 201, the middle mountain guard 202 and the right mountain guard 203; the spring needle track assembly further comprises a homing cam 4, the homing cam 4 is located below the needle raising cam 3, and the homing cam 4 comprises a left homing cam 401, a middle homing cam 402 and a right homing cam 403 which are distributed below the left needle raising cam 301, the middle needle raising cam 302 and the right needle raising cam 303.

The density cam 7 comprises a left density cam 701 and a right density cam 702 which are positioned at the left and right of the needle turning cam 10, and a density guide pin 5 is arranged on the density cam 7; a herringbone triangle 8 is arranged above the needle turning triangle 10, and a needle turning guide block 9 is arranged on the needle turning triangle 10.

The knitting needle group comprises knitting needles, connecting needles, spring needles and needle selection needles, wherein the knitting needles and the connecting needles are combined into a whole, and the connecting needles can rotate around a knitting needle rod by a certain angle. The connecting needle butt corresponds to the upper part of the bottom plate of the flat knitting machine, the spring needle butt corresponds to the middle part of the bottom plate of the flat knitting machine, the needle selecting butt corresponds to the lower part of the bottom plate of the flat knitting machine, the connecting needle moves along the outline of the left guard 201, the right guard 203 or the middle guard 202 to be contacted with the downward-pressing inclined angle surface of the knitting needle, the connecting needle butt sinks into the needle groove under the action of the pressure of the downward-pressing inclined angle surface of the knitting needle, the knitting needle does not participate in knitting, the spring needle pushes the connecting needle to move upwards to enable the connecting needle butt to protrude out of the bottom plate, and the knitting needle can continue knitting; the spring butt has certain elasticity, the hanging eye downward-pressing inclined angle surface 1111 is contacted with the spring butt, so that the butt part can be sunk into a needle groove or completely sunk into the needle groove, and when the downward-pressing inclined angle pressure disappears or the downward-pressing inclined angle is not contacted with the butt, the spring butt can automatically reset under the action of the elastic force until the butt protrudes out of the needle plate.

A flat knitting machine bottom plate knitting method for realizing pressing butt down comprises the following steps:

1) Performs the nonwoven function: as shown in fig. 6, the middle mountain guide block 11 is sunk into the bottom plate 1, the bottom plate 1 is right-going, the needle selecting corresponding to the needle selecting butt abutted by the lower hem of the needle selector is sunk into the needle groove, the needle selecting butt of the needle selecting is not contacted with the needle pushing triangle 16, at this time, the needle selecting, the spring needle, the connecting needle and the knitting needle are all at the initial positions, and the bottom plate of the flat knitting machine executes the non-knitting function;

2) Executing a hanging function: as shown in fig. 7, the needle turning guide block 9, the left push needle cam 1601 and the right push needle cam 1602 sink into the bottom plate 1, the bottom plate 1 moves right, the selector swing sheet is tilted and does not contact with the needle selection, the needle selection contacts with the needle selection protecting mountain 14 and pushes the needle selection and the corresponding spring needle to move upwards to reach the lifting eye preselected height, the spring butt enters the entrance of the butterfly mountain guide groove 122 and contacts with the needle lifting inclination groove 1221 and moves along the inclination angle, at this time, the spring butt part sinks into the needle groove and moves along the needle track, reaches the lifting eye depression inclination angle surface 1111 of the Zhongshan guide block 11, moves obliquely upwards to reach the lifting eye depression plane and continues to move into the lifting eye height, and the flat knitting machine bottom plate 1 performs the lifting eye function;

3) Executing a braiding function; as shown in fig. 8, the needle turning guide block 9 and the left push needle cam 1601 sink into the bottom plate, the needle selector swing piece is tilted and does not contact with the needle selector, the needle selector in the selected state contacts with the needle selector guard 14 and pushes the needle selector and the spring needle to move upwards to reach the lifting eye preselected height, then the needle selector is carried out once, the selected needle selector contacts with the contour of the right push needle cam 1602 and pushes the needle selector and the corresponding spring needle to move upwards to reach the knitting preselected height, the spring needle continues to move along the triangle contour of the butterfly mountain 12 into the knitting guide groove 112 of the Zhongshan guide block 11, the spring needle pushes the corresponding connecting needle and the knitting needle to reach the knitting height, and the bottom plate of the flat knitting machine performs the knitting function;

4) Executing the needle turning function: as shown in fig. 9, the middle mountain guide block 11 and the left push needle cam 1601 sink into the bottom plate 1, the needle selector swing piece is tilted and does not contact with the needle selector, the needle selector in the selected state contacts with the needle selector guard 14 and pushes the needle selector and the spring needle to move upwards to reach the lifting eye preselected height, then the needle selector is carried out once, the selected needle selector contacts with the contour of the right push needle cam 1602 and pushes the needle selector and the corresponding spring needle to move upwards to reach the knitting preselected height, the spring needle continues to move along the triangle contour of the butterfly mountain 12, at the moment, the connecting needle butt contacts with the contour of the needle turning guide block 9, the connecting needle pushes the needle into the needle turning channel, and the bottom plate 1 of the flat knitting machine executes the needle turning function;

5) Executing the left needle connecting function: as shown in fig. 10, the middle mountain guide block 11, the left push needle cam 1601 and the right push needle cam 1602 are sunk into the bottom plate, the bottom plate 1 of the flat knitting machine moves right, the selector swing sheet is tilted and does not contact with the selector, the selected selector contacts with the selector guard mountain 14 and pushes the selector and the corresponding spring needle to move upwards to reach the lifting eye preselected height, the spring butt enters the butterfly mountain guide groove 122 entrance of the butterfly mountain 12 to contact with the lifting needle dip groove 1221 and move along the dip angle, at this time, the spring butt part is sunk into the needle groove to move along the needle track while pushing the connecting needle and the knitting needle to reach the needle receiving height, the bottom plate 1 continues to move rightward, the connecting butt abuts against the left lower notch of the needle turning guide block 9 and moves downwards along the left lower notch contour of the needle turning guide block 9, the spring butt is driven to contact with the needle receiving dip angle groove 1211, the spring butt moves along the dip direction to fully sink into the bottom plate 1, the spring butt moves along the left return cam 401 contour to reach the starting position after entering the needle track, and the flat knitting machine bottom plate 1 completes the left needle receiving function;

6) Executing the right needle connecting function: as shown in fig. 11, the middle mountain guide block 11, the left push needle cam 1601 and the right push needle cam 1602 are sunk into the bottom plate 1, the bottom plate 1 moves leftwards, the selector swing sheet is tilted and is not in contact with the selector, the selected selector is in contact with the selector guard 14 and pushes the selector and the corresponding spring needle to move upwards to reach a lifting eye preselected height, the spring butt enters the butterfly mountain guide groove 122 of the butterfly mountain 12 and contacts with the lifting needle inclination groove 1221 and moves along the inclination angle, at the moment, the spring butt part is sunk into the needle groove and moves along the needle track while pushing the connecting needle and the knitting needle to reach the needle receiving height, the bottom plate 1 continues to move leftwards, the connecting butt abuts against the lower right notch of the needle turning guide block 9 and moves downwards along the lower right notch contour of the needle turning guide block 9, the spring butt is driven to contact with the needle receiving needle inclination groove 1211, the spring butt moves along the inclination direction to fully sunk into the bottom plate 1, the spring butt moves along the right homing cam 403 contour to reach the starting position after entering the needle track, and the bottom plate 1 completes the right needle receiving function;

7) Executing the knitting function of the eye belt: as shown in fig. 12, the needle turning guide block 9 and the left push needle cam 1601 sink into the bottom plate 1, the bottom plate 1 moves right, the needle selector swing piece swings down to abut against the needle selecting butt to enable a part of the needle selecting to sink into the needle slot to finish the first needle selecting, the bottom plate 1 continues to move, the needle selector swing piece swings up for the second time and does not contact with the needle selecting, the knitting needle corresponding to the needle selected for the second time executes the knitting function according to the step 3, and meanwhile, the knitting needle corresponding to the needle not selected for the first time executes the hanging function, and the function is the same-row hanging function performed by the same system in the same row of knitting instructions;

8) Executing a flip-up function: as shown in fig. 13, the middle mountain guide block 11 and the left push needle cam 1601 sink into the bottom plate 1, the bottom plate 1 moves right, the needle selector swing piece lower hem pushes against the needle selecting butt to enable a part of the needle selecting to sink into the needle slot to finish the first needle selecting, the bottom plate 1 continues to move, the second needle selecting needle selector swing piece tilting does not contact with the needle selecting, the needle turning function is executed in the needle installing step 4 corresponding to the second selected needle, and meanwhile, the knitting needle corresponding to the first unselected needle executes the lifting function, and the function is the turning function of the same system in the same row of knitting instructions.

In summary, the foregoing description is only of the preferred embodiments of the present utility model, and all equivalent changes and modifications made in accordance with the claims should be construed to fall within the scope of the utility model.

Claims (9)

1. The utility model provides a realization pushes down flat knitting machine bottom plate structure of butt, includes bottom plate (1), its characterized in that: the knitting needle track assembly, the spring needle track assembly and the needle selecting track assembly are arranged on the bottom plate (1), the knitting needle track assembly comprises a protecting mountain (2), a density triangle (7) and a needle turning triangle (10), and the spring needle track assembly comprises a butterfly mountain (12) and a middle mountain guide block (11) assembled with the butterfly mountain (12); the mountain protection (2) is provided with a mountain protection bulge (21), the mountain protection bulge (21) is in contact fit with the connecting needle butt, the mountain guide block (11) is provided with a mountain groove (111), and the mountain guide block (11) is in contact fit with the spring needle butt.

2. The flat knitting machine bottom plate structure for realizing the butt pressing according to claim 1, characterized in that: the mountain-protecting bulge (21) is arranged at the lower part of the mountain-protecting bulge (2) and is positioned on a knitting needle track, the left side wall surface and the right side wall surface of the mountain-protecting bulge (21) are knitting needle downward-pressing inclined angle surfaces, and the included angle between the knitting needle downward-pressing inclined angle surfaces and the base surface of the bottom plate (1) is 25-45 degrees.

3. The flat knitting machine bottom plate structure for realizing the butt pressing according to claim 1, characterized in that: the middle mountain groove (111) is positioned at the lower part of the middle mountain guide block (11), the inner walls of the left side and the right side of the middle mountain groove (111) are eye-lifting downward-pressing inclined angle surfaces (1111), and an included angle between the eye-lifting downward-pressing inclined angle surfaces (1111) and the base surface of the bottom plate (1) is 30-40 degrees; the knitting guide groove (112) is arranged on the Zhongshan guide block (11), the knitting guide groove (112) is an arch-shaped groove which arches upwards, and the arch part of the knitting guide groove (112) is positioned above the Zhongshan groove (111).

4. The flat knitting machine bottom plate structure for realizing the butt pressing according to claim 1, characterized in that: the upper edge of the butterfly mountain (12) is a double-arch upper guide edge (121) which is arched upwards, the left side and the right side of the upper part of the butterfly mountain (12) are both provided with needle-receiving return needle inclined grooves (1211) connected with the upper guide edge (121), and the included angle between the bottom of the needle-receiving return needle inclined grooves (1211) and the basal plane of the bottom plate (1) is 25-45 degrees.

5. The flat knitting machine bottom plate structure for realizing the butt pressing according to claim 1 or 4, characterized in that: the lower part of the butterfly mountain (12) is provided with a butterfly mountain guide groove (122), the butterfly mountain guide groove (122) is an arch-shaped groove arched upwards, the uppermost end of the butterfly mountain guide groove (122) is provided with a notch and is communicated with the upper guide edge (121), the notch parts of the left side and the right side of the butterfly mountain guide groove (122) are provided with needle lifting inclined angle grooves (1221), and the included angle between the groove bottom of the needle lifting inclined angle grooves (1221) and the basal plane of the bottom plate (1) is 15-30 degrees.

6. The flat knitting machine bottom plate structure for realizing the butt pressing according to claim 1, characterized in that: the needle overturning device also comprises a pressing spring piece (17), wherein the pressing spring piece (17) is positioned below the needle overturning triangle (10) and above the Zhongshan guide block (11); the downward pressing elastic sheet (17) is bent and provided with two bending bulges (171) protruding outwards, and the bending bulges (171) are contacted with the connecting needle butt and press the auxiliary needle into the needle groove.

7. The flat knitting machine bottom plate structure for realizing the butt pressing according to claim 1, characterized in that: the needle selecting track assembly comprises an upper needle selecting triangle (13), a needle selecting and protecting mountain (14), a lower needle selecting triangle (15), a needle pushing triangle (16) and a needle lifting triangle (6); the upper needle selecting triangle (13) and the needle selecting protecting mountain (14) are connected in sequence; the lower needle selecting triangle (15), the pushing needle triangle (16) and the needle lifting triangle (6) are connected in sequence; the upper needle selecting triangle (13) comprises an upper left needle selecting triangle (1301), a middle upper needle selecting triangle (1302) and an upper right needle selecting triangle (1303), the lower needle selecting triangle (15) comprises a lower left needle selecting triangle (1501), a middle lower needle selecting triangle (1502) and a lower right needle selecting triangle (1503), and the push needle triangle (16) comprises a left push needle triangle (1601) and a right push needle triangle (1602).

8. The flat knitting machine bottom plate structure for realizing the butt pressing according to claim 1, characterized in that: the mountain guard (2) comprises a left mountain guard (201), a middle mountain guard (202) and a right mountain guard (203); the needle lifting device further comprises a needle lifting triangle (3), wherein the needle lifting triangle (3) is positioned below the mountain guard (2), and the needle lifting triangle (3) comprises a left needle lifting triangle (301), a middle needle lifting triangle (302) and a right needle lifting triangle (303) which are respectively positioned below the left mountain guard (201), the middle mountain guard (202) and the right mountain guard (203); the spring needle track assembly further comprises a homing triangle (4), wherein the homing triangle (4) is positioned below the needle lifting triangle (3), and the homing triangle (4) comprises a left homing triangle (401), a middle homing triangle (402) and a right homing triangle (403) which are distributed below the left needle lifting triangle (301), the middle needle lifting triangle (302) and the right needle lifting triangle (303).

9. The flat knitting machine bottom plate structure for realizing the butt pressing according to claim 1, characterized in that: the density triangle (7) comprises a left density triangle (701) and a right density triangle (702) which are positioned at the left and the right of the needle turning triangle (10), and a density guide pin (5) is arranged on the density triangle (7); a herringbone triangle (8) is arranged above the needle turning triangle (10), and a needle turning guide block (9) is arranged on the needle turning triangle (10).