CN218291259U

CN218291259U - Bottom plate device

Info

Publication number: CN218291259U
Application number: CN202221583351.6U
Authority: CN
Inventors: 李祥才; 肖祥能; 夏利芳; 平正斐
Original assignee: Zhejiang Tongtai Intelligent Technology Co ltd
Current assignee: Zhejiang Tongtai Intelligent Technology Co ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2023-01-13
Anticipated expiration: 2032-06-21

Abstract

The utility model provides a bottom plate device, which comprises a cocurrent lifting mesh bottom plate structure and a seven-station control structure, the cocurrent lifting mesh bottom plate structure comprises a needle-turning triangle, a knitting triangle, a left needle-lifting triangle, a right needle-lifting triangle, a left needle-receiving triangle, a right needle-receiving triangle, a reverse needle center triangle and a needle-lifting triangle, the triangles can be controlled by the seven-station control structure to protrude out and retract into the cocurrent lifting mesh bottom plate structure, so that a plurality of groups of different triangles are contacted with knitting needles and needle selection pieces to complete different knitting actions; seven station control structure include driving motor, upper cam, signal disc, lower cam and lift needle triangle cam, accomplish by seven station control structure control triangles and weave, with the line hang mesh area weave, turn over the needle, hang mesh, the line of going left and right connects needle, the line of going right and connects needle, seven instructions of idle running, the utility model discloses a driving motor is cam, signal disc, lower cam and the rotation of lift needle triangle cam in the simultaneous control, greatly increased work efficiency, the device operation is more stable high-efficient, weaves the flower type abundanter.

Description

Bottom plate device

Technical Field

The utility model belongs to the technical field of computerized flat knitting machine's computerized flat knitting machine bottom plate and specifically relates to a seven stations are with going to hang mesh bottom plate device, belong to a key part among the computerized flat knitting machine.

Background

The performance of a bottom plate in the computerized flat knitting machine can directly influence the knitting function of the computerized flat knitting machine, the design of a same-row mesh-hanging structure of the bottom plate of the existing computerized flat knitting machine is not reasonable enough, a same-row mesh-hanging triangle is used for replacing a knitting triangle to perform knitting action on the bottom plate of the same-row mesh-hanging machine at present, a needle selection sheet is used for pushing a knitting needle to move, the load of the bottom plate is larger, the working time of the needle selection sheet is greatly increased, the service life of the machine is influenced, and the knitting function of the computerized flat knitting machine is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, a main object of the present invention is to provide a bottom plate device of a straight-stitch computerized flat knitting machine, which has a more reasonable structure and more stable operation.

In order to realize the purpose, the utility model adopts the technical scheme as follows:

a bottom plate device comprises a parallel mesh hanging bottom plate structure and a seven-station control structure; the seven-station control structure comprises driving motors, an upper cam, a signal panel, a lower cam and a needle lifting triangular cam, wherein one driving motor simultaneously controls the upper cam, the signal panel, the lower cam and the needle lifting triangular cam to rotate.

The bottom plate device is characterized in that the same-row mesh lifting bottom plate structure comprises a needle turning cam, a knitting cam, a left needle raising cam, a right needle raising cam, a left needle receiving cam, a right needle receiving cam, a reverse needle center cam and a needle lifting cam, wherein the cams can be controlled by a seven-station control structure to protrude out and retract into the same-row mesh lifting bottom plate structure, so that a plurality of groups of different cams are in contact with knitting needles and needle selection pieces to complete different knitting actions.

The bottom plate device is characterized in that the seven-station control structure controls the triangle to complete seven instructions of weaving, weaving with a mesh belt in the same row, needle turning, mesh hanging, left-going and right-going needle receiving, right-going and left-going needle receiving and idle running.

Further, the backplane apparatus is characterized in that each command corresponds to a position on the signal panel.

Further, the backplane device is characterized in that the signal panel determines the currently executed command by sensing the rotation angle of the driving motor through an encoder.

Further, the base plate device is characterized in that the cams are in contact with the knitting needles or the selector jacks when the cams protrude out of the same-row stitch base plate structure, so that the knitting needles or the selector jacks move along the contour of the cam profile to form different needle-passing tracks.

The bottom plate device is characterized in that the seven-station control structure feeds back a digital signal formed by an encoder to the bottom plate control system through the rotating angle of the driving motor by a signal panel.

Further, the bottom plate device is characterized in that the triangle is movably embedded on the same-row mesh hanging bottom plate structure.

Further, the bottom plate device is characterized in that guide pillars are arranged on the back faces of the triangles, a lifting seat is mounted on each guide pillar, a bearing is mounted on each lifting seat, a triangle fixing plate is mounted at the tail end of each guide pillar, and a return spring is sleeved between each lifting seat and the corresponding triangle fixing plate.

Further, the bottom plate device is characterized in that the supporting rod for the triangle fixing plate is fixedly installed on the same-row mesh bottom plate structure, the triangle fixing plate comprises an upper triangle fixing plate, a middle triangle fixing plate and a lower triangle fixing plate, the needle turning triangle and the knitting triangle are fixed by the upper triangle fixing plate and can only move up and down, the middle triangle fixing plate for the reverse needle center triangle is fixed and can only move up and down, and the left needle raising triangle, the right needle raising triangle, the left needle receiving triangle and the right needle receiving triangle are fixed and can only move up and down by the lower triangle fixing plate.

Further, the bottom plate device is characterized in that when the triangle moves upwards and retracts into the bottom plate structure of the same row of meshes, the triangle is not in contact with the knitting needle or the needle selector and is in a non-working state; when the cam moves downwards to protrude the bottom plate structure of the same row of eye hanging, the cam is in contact with the knitting needle or the needle selecting sheet to be in a working state.

The bottom plate device is characterized in that the upper cam controls the stitch cam and the knitting cam, and when the upper cam is in an upper stroke, the upper cam is in contact with a bearing on the lifting seat to enable the stitch cam and the knitting cam to move upwards and retract into the same-row mesh hanging bottom plate structure; when the upper cam is in a lower stroke, the lifting seat enables the needle-turning triangle and the knitting triangle to move downwards under the action of the return spring to protrude out of the mesh hanging bottom plate structure in the same row.

The bottom plate device is characterized in that the lower cam controls a left needle raising cam, a right needle raising cam, a left needle receiving cam, a right needle receiving cam and a reverse needle center cam, and when the lower cam is in an upper stroke, the lower cam is in contact with a bearing on the lifting seat to enable the left needle raising cam, the right needle raising cam, the left needle receiving cam and the right needle receiving cam to move upwards and retract into the parallel lifting eye bottom plate structure; when the lower cam is in a lower stroke, the lifting seat enables the left needle raising cam, the right needle raising cam, the left needle receiving cam and the right needle receiving cam to move downwards under the action of the return spring to protrude out of the parallel lifting mesh bottom plate structure.

Further, the bottom plate device is characterized in that a guide pillar is mounted on the reverse needle center triangle, the guide pillar is mounted in the middle triangle fixing seat and can move up and down, a sliding shaft sleeve is mounted at the tail end of the guide pillar, and a return spring is mounted between the sliding shaft sleeve and the middle triangle fixing seat.

Further, the bottom plate device is characterized in that when the lower cam is in an upper stroke, the lower cam is in contact with the sliding shaft sleeve, so that the center triangle of the reverse needle moves downwards to protrude out of the same-row suspended mesh bottom plate structure; when the lower cam is in a lower stroke, the center triangle of the reverse needle moves upwards under the action of the return spring and retracts into the same-row eye hanging bottom plate structure.

The bottom plate device is characterized in that the needle lifting cam is fixed by a needle lifting cam fixing seat and can only move up and down, a rotating shaft is mounted on the needle lifting cam fixing seat, a pry rod and a connecting rod are mounted on the rear side of the needle lifting cam fixing seat, the pry rod and the connecting rod rotate for a certain angle by taking the rotating shaft as a midpoint, a bearing is arranged on the pry rod and is in contact with the needle lifting cam, when the needle lifting cam is in an upper stroke, the needle lifting cam is in contact with the bearing to enable the pry rod and the connecting rod to rotate around the rotating shaft, so that a needle lifting surface of the needle lifting cam is lifted to be in contact with a needle selection piece, and when the needle lifting cam is in a lower stroke, the needle lifting cam descends and is not in contact with the needle selection piece to be in a non-working state.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

the utility model has the advantages that in the weaving function, the bottom plate can carry out weaving instructions while carrying out the mesh hanging instructions in the same weaving process, so that the weaving patterns are more various and the weaving patterns are more abundant; structurally, the upper cam, the lower cam and the needle lifting cam control a plurality of cams simultaneously, and the bottom plate can be switched among various instructions, so that the device runs more stably and efficiently; one stepping motor saves cost, can accurately ensure that the bottom plate executes various different instructions, one motor drives the bottom plate to work more accurately, instruction switching is more coherent, and the working efficiency is greatly increased.

Drawings

Fig. 1 is a front view of the bottom plate device of the present invention.

Fig. 2 is a cross-sectional view of the bottom plate device of the present invention.

Fig. 3 is a front view of the needle lifting cam structure of the present invention.

Fig. 4 is a schematic diagram of knitting instruction stitch according to the present invention.

Fig. 5 is a schematic diagram of knitting instruction needle-moving of the mesh-hanging belt in the same line of the present invention.

Fig. 6 is a schematic diagram of the stitch change instruction stitch according to the present invention.

Fig. 7 is a schematic view of the needle movement instruction of the present invention.

Fig. 8 is a schematic diagram of a left-hand and right-hand stitch receiving instruction stitch.

Fig. 9 is a schematic diagram of the right-hand left-hand stitch receiving instruction stitch of the present invention.

Fig. 10 is a schematic diagram of the idle running command routing according to the present invention.

Description of the reference symbols: 1. a needle turning triangle; 2. weaving a triangle; 3. a needle lifting triangle; 4. a left needle raising triangle; 5. a left connecting needle triangle; 6. reverse needle center triangle; 7. a right needle connecting triangle; 8. a right needle raising triangle; 9. a needle plate; 10. knitting needles; 11. selecting a needle; 12. an upper cam; 13. a drive motor; 14. a signal panel; 15. an encoder; 16. a lower cam; 17. a needle lifting cam; a-1, a guide pillar; a-2, a lifting seat; a-3, mounting a triangular fixing plate; a-4, guide pillars; a-5, a lifting seat; a-6, a return spring; b-1, a middle triangular fixing seat; b-2, a guide post; b-3, a return spring; b-4, sliding shaft sleeves; b-5, a lifting seat; b-6, a guide post; b-7, a return spring; b-8, a lower triangular fixing plate; c-1, lifting the needle triangle fixing seat; c-2, a rotating shaft; c-3, a pry bar; c-4, connecting rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the structural drawings and specific examples described herein are for purposes of illustration only and are not intended to limit the invention.

The utility model relates to a bottom plate device, wherein, the needle triangle that turns over, weave triangle, left rise cam, right rise cam, left needle triangle that connects, right needle triangle that connects, reverse stitch center triangle and lift the needle triangle and install in with the line hangs mesh bottom plate structurally, utilize the encoder to form digital signal to feed back to bottom plate control system through the signal disc with the rotatory angle of driving motor by seven station control structures, can accurately guarantee that the bottom plate carries out the instruction of various differences, seven different instructions correspond seven operating positions.

Example 1

As shown in fig. 1-10, a bottom plate device comprises a concurrent stitch bottom plate structure and a seven-station control structure, wherein the concurrent stitch bottom plate structure comprises a stitch cam 1, a knitting cam 2, a left needle raising cam 4, a right needle raising cam 8, a left needle receiving cam 5, a right needle receiving cam 7, a reverse needle center cam 6 and a needle lifting cam 3, the cams are movably embedded on the concurrent stitch bottom plate structure, guide columns are arranged on the backs of the cams, lifting seats are arranged on the guide columns, bearings are arranged on the lifting seats, cam fixing plates are arranged at the tail ends of the guide columns, return springs are sleeved between the lifting seats and the cam fixing plates, the cam fixing plates are fixedly arranged on the concurrent stitch bottom plate structure by support rods, the stitch cam 1 and the knitting cam 2 are fixed by an upper cam fixing plate a-3 to enable the cams to move up and down, the reverse needle center cam 6 is fixed by a middle cam fixing plate B-1 to enable the cams to move up and down, the left needle raising cam 4, the right needle raising cam 8, the left needle receiving cam 5 and the right needle receiving cam 7 are fixed by a lower cam fixing plate B-8 to enable the cam to move up and down, and the cam signal plate 12 and the cam lifting cam 17.

Example 2

As shown in fig. 1-10, in the bottom plate device, an upper cam 12 controls a stitch cam 1 and a knitting cam 2, when the upper cam 12 is in an upper stroke, the upper cam 12 is in contact with bearings on lifting seats A-2 and A-5 to enable the stitch cam 1 and the knitting cam 2 to move upwards and retract into a same-row mesh hanging bottom plate structure, and at the moment, the stitch cam 1 and the knitting cam 2 are not in contact with a knitting needle 10 and are in a non-working state; when the upper cam 12 is in a lower stroke, the lifting seat enables the needle-turning cam 1 and the knitting cam 2 to move downwards under the action of the return spring A-6 to protrude out of the same-row mesh hanging bottom plate structure, and at the moment, the needle-turning cam 1 and the knitting cam 2 are in a working state in contact with the knitting needle 10. The lower cam 16 controls the left needle raising cam 4, the right needle raising cam 8, the left needle receiving cam 5, the right needle receiving cam 7 and the reverse needle center cam 6, when the lower cam 16 is in an upper stroke, the lower cam 16 is in contact with a bearing on the lifting seat B-5, so that the left needle raising cam 4, the right needle raising cam 8, the left needle receiving cam 5 and the right needle receiving cam 7 move upwards and retract into the bottom plate structure of the same-row lifting eye, and at the moment, the left needle raising cam 4, the right needle raising cam 8, the left needle receiving cam 5 and the right needle receiving cam 7 are not in contact with the needle selection piece 11 and are in a non-working state; when the lower cam 16 is in a lower stroke, the lifting seat enables the left needle raising cam 4, the right needle raising cam 8, the left needle receiving cam 5 and the right needle receiving cam 7 to move downwards under the action of the return spring B-7 to protrude out of the parallel lifting eye bottom plate structure, and at the moment, the left needle raising cam 4, the right needle raising cam 8, the left needle receiving cam 5 and the right needle receiving cam 7 are in a working state in contact with the needle selection piece 11. The reverse needle center cam 6 is provided with a guide pillar B-2, the guide pillar B-2 is arranged in a middle cam fixing seat B-1 and can move up and down, the tail end of the guide pillar B-2 is provided with a sliding shaft sleeve B-4, a return spring B-7 is arranged between the sliding shaft sleeve B-4 and a middle cam fixing plate B-1, when the lower cam 16 is in an upper stroke, the lower cam 16 is in contact with the sliding shaft sleeve B-4 to enable the reverse needle center cam 6 to move downwards to protrude out of the same-row eye hanging bottom plate structure, and at the moment, the reverse needle center cam 6 is in contact with the selector 11 to be in a working state; when the lower cam 16 is in a lower stroke, the reverse needle center cam 6 moves upwards under the action of the return spring B-7 to retract into the same-row mesh hanging bottom plate structure, and at the moment, the reverse needle center cam 6 is not in contact with the selector 11 and is in a non-working state. The needle lifting cam 3 is fixed by a needle lifting cam fixing seat C-1 and can only move up and down, a rotating shaft C-2 is installed on the needle lifting cam fixing seat C-1, a pry bar C-3 and a connecting rod C-4 are installed on the rear side of the needle lifting cam fixing seat C-1, the pry bar C-3 and the connecting rod C-4 rotate for a certain angle by taking the rotating shaft C-2 as a midpoint, a bearing is arranged on the pry bar C-3 and is in contact with a needle lifting cam 17, when the needle lifting cam 17 is in an upper stroke, the needle lifting cam 17 is in contact with the bearing to enable the pry bar C-3 and the connecting rod C-4 to rotate around the rotating shaft C-2, so that an upper needle lifting surface of the needle lifting cam 3 is in contact with the needle selector 11, and when the needle lifting cam 17 is in a lower stroke, the needle lifting cam 3 descends and is not in contact with the needle selector 11 to be in a non-working state.

Example 3

As shown in fig. 1-10, when a knitting command is executed on a bottom plate of a same-row mesh, the bottom plate structure of the same-row mesh moves to the right, a needle lifting cam 3 contacts with a selector 11, a needle turning cam 1 retracts into the bottom plate structure of the same-row mesh, a knitting cam 2 protrudes out of the bottom plate structure of the same-row mesh, a left needle lifting cam 4, a right needle lifting cam 8, a left needle receiving cam 5 and a right needle receiving cam 7 protrude out of the bottom plate structure of the same-row mesh, and a reverse needle center cam 6 retracts into the bottom plate structure of the same-row mesh; when the same-row mesh lifting bottom plate executes a same-row mesh lifting belt knitting instruction, the same-row mesh lifting bottom plate structure moves to the right, the needle lifting triangle 3 is in contact with the needle selecting sheet 11, the needle turning triangle 1 and the knitting triangle 2 of the first system retract into the same-row mesh lifting bottom plate structure, the left needle lifting triangle 4, the right needle lifting triangle 8, the left needle receiving triangle 5 and the right needle receiving triangle 7 protrude out of the same-row mesh lifting bottom plate structure, the reverse needle center triangle 6 retracts into the same-row mesh lifting bottom plate structure, the first system executes a mesh lifting action, the needle turning triangle 1 and the knitting triangle 2 of the second system retract into the same-row mesh lifting bottom plate structure, the left needle lifting triangle 4, the right needle lifting triangle 8, the left needle receiving triangle 5 and the right needle receiving triangle 7 protrude out of the same-row mesh lifting bottom plate structure, the reverse needle center triangle 6 protrudes out of the same-row mesh lifting bottom plate structure, and the first system and the second system are matched with each other to execute the same-row mesh lifting belt knitting instruction; when the same-row mesh hoisting bottom plate executes a needle turning instruction, the same-row mesh hoisting bottom plate structure moves to the right, the needle lifting cam 3 is in contact with the needle selector 11, the needle turning cam 1 and the knitting cam 2 protrude out of the same-row mesh hoisting bottom plate structure, the left needle lifting cam 4, the right needle lifting cam 8, the left needle receiving cam 5 and the right needle receiving cam 7 protrude out of the same-row mesh hoisting bottom plate structure, and the reverse needle center cam 6 retracts into the same-row mesh hoisting bottom plate structure; when the same-row mesh hoisting bottom plate executes a mesh hoisting instruction, the same-row mesh hoisting bottom plate structure moves to the right, the needle lifting triangle 3 is in contact with the needle selection sheet 11, the needle turning triangle 1 and the knitting triangle 2 retract into the same-row mesh hoisting bottom plate structure, the left needle lifting triangle 4, the right needle lifting triangle 8, the left needle receiving triangle 5 and the right needle receiving triangle 7 protrude out of the same-row mesh hoisting bottom plate structure, and the reverse needle center triangle 6 retracts into the same-row mesh hoisting bottom plate structure; when the parallel lifting eye bottom plate executes a left-going and right-receiving instruction, the parallel lifting eye bottom plate structure moves left, the needle lifting cam 3 is in contact with the needle selection sheet 11, the needle transferring cam 1 and the knitting cam 2 protrude out of the parallel lifting eye bottom plate structure, the left needle raising cam 4, the right needle raising cam 8, the left needle receiving cam 5 and the reverse needle center cam 6 are retracted into the parallel lifting eye bottom plate structure, and the right needle receiving cam 7 protrudes out of the parallel lifting eye bottom plate structure; when the same-row mesh hanging bottom plate executes a right-row left needle receiving instruction, the same-row mesh hanging bottom plate structure moves to the right, the needle lifting cam 3 is in contact with the needle selecting sheet 44, the needle transferring cam 1 and the knitting cam 2 protrude out of the same-row mesh hanging bottom plate structure, the left needle lifting cam 4, the right needle lifting cam 8, the right needle receiving cam 7 and the reverse needle center cam 6 are retracted into the same-row mesh hanging bottom plate structure, and the left needle receiving cam 5 protrudes out of the same-row mesh hanging bottom plate structure; when the same-row mesh lifting bottom plate structure executes the idle running instruction, the same-row mesh lifting bottom plate structure moves to the right, the needle lifting cam 3 is not in contact with the needle selection sheet 11, the needle selection sheet 11 is not selected, and the knitting needle 10 is not in contact with the cam.

The above embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not to be understood as the limitation of the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A bottom plate device comprises a parallel mesh hanging bottom plate structure and a seven-station control structure, and is characterized in that the seven-station control structure comprises driving motors, an upper cam, a signal panel, a lower cam and a needle lifting cam, and one driving motor simultaneously controls the upper cam, the signal panel, the lower cam and the needle lifting cam to rotate.

2. The floor apparatus of claim 1, wherein said peer stitch floor structure includes a needle-transferring cam, a knitting cam, a left needle-raising cam, a right needle-raising cam, a left needle-receiving cam, a right needle-receiving cam, a needle-reversing center cam, and a needle-raising cam, said cams being controlled by a seven-station control structure to protrude and retract into said peer stitch floor structure, such that different sets of cams are brought into contact with the knitting needles and the selector jacks to perform different knitting operations.

3. The floor apparatus of claim 1, wherein said seven-station control structure controls said triangle to complete seven commands of knitting, same-row sling knitting, needle turning, sling, left-row right needle receiving, right-row left needle receiving, and idle operation.

4. Backplane device according to claim 3, wherein each command corresponds to a position on a signal plane.

5. Backplane device according to claim 3, characterized in that the signal disc determines the currently executed command by means of an encoder sensing the rotation angle of the drive motor.

6. The bottom plate apparatus according to claim 2, wherein the cam is in contact with the knitting needle or the selector jack when the cam projects out of the knitting bottom plate structure, so that the knitting needle or the selector jack moves along a cam profile to form different needle passing paths.

7. The backplane device according to claim 1, wherein the seven-station control structure forms a digital signal feedback to the backplane control system through an encoder by using a signal panel to drive a motor to rotate by an angle.

8. The flooring system of claim 2, wherein said triangles are removably embedded in said parallel mesh flooring structure.

9. The bottom plate device according to claim 2, wherein the back of the triangle is provided with a guide post, the guide post is provided with a lifting seat, the lifting seat is provided with a bearing, the end of the guide post is provided with a triangle fixing plate, and a return spring is sleeved between the lifting seat and the triangle fixing plate.

10. The bottom plate apparatus of claim 9, wherein the cam fixing plate is fixed to the parallel eye bottom plate structure by a support rod, the cam fixing plate includes an upper cam fixing plate, a middle cam fixing plate, and a lower cam fixing plate, the stitch transferring cam and the knitting cam are fixed by the upper cam fixing plate so that the cam can move only up and down, the reverse center cam is fixed by the middle cam fixing plate so that the cam can move only up and down, and the left needle raising cam, the right needle raising cam, the left needle receiving cam, and the right needle receiving cam are fixed by the lower cam fixing plate so that the cam can move only up and down.

11. The bottom plate apparatus according to claim 2, wherein when the cam is moved upward to retract into the knitting head structure of the same row, the cam is in a non-operating state without contacting the knitting needle or the selector jack; when the cam moves downwards to protrude the bottom plate structure of the same row of eye hanging, the cam is in contact with the knitting needle or the needle selecting sheet to be in a working state.

12. The floor apparatus according to claim 9, wherein the upper cam controls the stitch cam and the knitting cam, and when the upper cam is in an upper stroke, the upper cam contacts with a bearing on the lifting seat to move the stitch cam and the knitting cam upwards to retract into the same-row mesh floor structure; when the upper cam is in a lower stroke, the lifting seat enables the needle-turning triangle and the knitting triangle to move downwards under the action of the return spring to protrude out of the mesh hanging bottom plate structure in the same row.

13. The bottom plate device according to claim 2, wherein the lower cam controls the left needle raising cam, the right needle raising cam, the left needle receiving cam, the right needle receiving cam and the reverse needle center cam, and when the lower cam is in an upper stroke, the lower cam is in contact with a bearing on the lifting seat to enable the left needle raising cam, the right needle raising cam, the left needle receiving cam and the right needle receiving cam to move upwards and retract into the same-row eye bottom plate structure; when the lower cam is in a lower stroke, the lifting seat enables the left needle raising cam, the right needle raising cam, the left needle receiving cam and the right needle receiving cam to move downwards under the action of the return spring to protrude out of the parallel lifting mesh bottom plate structure.

14. The bottom plate device according to claim 2, wherein the reverse needle center cam is provided with a guide post, the guide post is mounted in the middle cam fixing seat and can move up and down, the tail end of the guide post is provided with a sliding shaft sleeve, and a return spring is mounted between the sliding shaft sleeve and the middle cam fixing seat.

15. The baseplate apparatus of claim 14 wherein the lower cam contacts the sliding sleeve during the upper stroke of the lower cam to move the cam down to project the ceiling structure; when the lower cam is in a lower stroke, the center of the reverse needle moves upwards in a triangle manner to retract into the same-row eye hanging bottom plate structure under the action of the return spring.

16. The bottom plate device according to claim 2, wherein the needle raising cam is fixed by a needle raising cam holder and can only move up and down, a rotating shaft is installed on the needle raising cam holder, a pry bar and a connecting rod are installed on the rear side of the needle raising cam holder, the pry bar and the connecting rod rotate at a certain angle with the rotating shaft as a midpoint, a bearing is arranged on the pry bar, the bearing is in contact with the needle raising cam, when the needle raising cam is in an up stroke, the needle raising cam is in contact with the bearing to rotate the pry bar and the connecting rod around the rotating shaft, so that a needle raising surface of the needle raising cam is in contact with the selector, and when the needle raising cam is in a down stroke, the needle raising cam descends without being in contact with the selector and is in a non-working state.