CN112877893A

CN112877893A - Double-layer traction roller device of flat knitting machine

Info

Publication number: CN112877893A
Application number: CN202110032986.0A
Authority: CN
Inventors: 王靖敏; 钟佳明; 陈崇; 安勇强; 张锋
Original assignee: Tongxiang Qianglong Machinery Co Ltd
Current assignee: Tongxiang Qianglong Machinery Co Ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-06-01
Anticipated expiration: 2041-01-11
Also published as: CN112877893B

Abstract

The invention relates to a double-layer traction roller device of a flat knitting machine.A pair of main rollers are arranged in parallel in tandem, and a pair of auxiliary rollers are arranged in parallel in tandem; the opening and closing mechanism is used for driving the opening and closing of a pair of main roller rollers and a pair of auxiliary roller rollers, the main roller driving mechanism comprises a main roller motor, a second transmission shaft and two sets of second transmission gear sets, the main roller motor transmits power to the two sets of second transmission gear sets through the second transmission shaft, the auxiliary roller driving mechanism comprises an auxiliary roller motor, a pair of auxiliary roller power gears and a universal joint, the auxiliary roller motor is in transmission connection with one auxiliary roller transmission shaft through a second belt, and the two auxiliary roller transmission shafts are respectively connected with the pair of auxiliary roller rollers through the universal joint. The power transmission of main roller and vice roller in this application all adopts the mode that the motor combines drive gear group, and gear drive simple structure, occupation installation space are little, and the transmission precision is high, operate steadily, be difficult for breaking down.

Description

Double-layer traction roller device of flat knitting machine

Technical Field

The invention relates to the technical field of computerized flat knitting machines, in particular to a double-layer traction roller device of a flat knitting machine.

Background

The roller device in the flat knitting machine is used for drawing out the fabric downwards for subsequent winding, and because the roller and the needle plate have a certain distance, the fabric is required to be drawn into the roller device by using the starting bottom plate when the fabric is just woven, in order to avoid the collision between the roller device and the starting bottom plate, the roller device is required to be opened, the conventional roller device is usually arranged to be openable on one side, and fixedly and rotatably mounted on the other side, and the structure also has the defects that the roller device is easy to collide with the starting bottom plate, in addition, the conventional roller device has the defects of complex overall structure, large occupied mounting space, unreasonable power transmission mechanism arrangement and the like, for example, the double-roller mechanism shown in the patent application with the publication number of CN 207405304U.

There is therefore a need for improvements and optimisation of existing roping arrangements.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the double-layer traction roller device of the flat knitting machine, which has reasonable structural design, openable rollers at two sides and simple power transmission mode.

The technical scheme adopted by the invention for solving the problems is as follows: a double-layer traction roller device of a flat knitting machine comprises a pair of main roller rollers, a pair of auxiliary roller rollers, a roller front mounting plate, a roller rear mounting plate and a support plate; the two support plates are arranged in parallel in a left-right direction; the pair of main roller rollers are positioned above the pair of auxiliary roller rollers, the pair of main roller rollers are arranged in parallel in tandem, and the pair of auxiliary roller rollers are arranged in parallel in tandem; the roller front mounting plates and the roller rear mounting plates are identical in structure and are respectively provided with two, the two roller front mounting plates are arranged in front of the two roller rear mounting plates, the two roller front mounting plates are connected through a cross beam, similarly, the two roller rear mounting plates are also connected through a cross beam, two ends of a main roller and an auxiliary roller are respectively rotatably mounted on the two roller front mounting plates, and two ends of the other main roller and the other auxiliary roller are respectively rotatably mounted on the two roller rear mounting plates; the method is characterized in that: the device also comprises an opening and closing mechanism, a main roller driving mechanism and an auxiliary roller driving mechanism; the opening and closing mechanism is used for driving the opening and closing of the front mounting plate and the rear mounting plate of the roller so as to drive the opening and closing of the pair of main roller and the pair of auxiliary roller, and comprises an opening and closing motor, a first transmission shaft and two opening and closing assemblies; the opening and closing assembly comprises a front sliding block, a rear sliding block, two fixed blocks, a pair of sector gears and a first transmission gear set, the two fixed blocks are arranged and mounted on one side of the supporting plate, the front sliding block and the rear sliding block are both connected with the supporting plate in a sliding mode, the front sliding block is fixedly connected with the roller front mounting plate, the rear sliding block is fixedly connected with the roller rear mounting plate, the front sliding block and the rear sliding block are both provided with sliding grooves, the two fixed blocks are respectively located in the two sliding grooves, the same end of a pair of auxiliary rollers penetrates through the supporting plate and then is respectively connected with the front sliding block and the rear sliding block in a rotating mode, the bottom of the front sliding block is of a rack structure, a power tail end output gear in the first transmission gear set is meshed with the rack structure, and a power starting end input gear in the first transmission gear set is meshed; the pair of sector gears are meshed and arranged on one side of the supporting plate, and are respectively connected with the front sliding block and the rear sliding block; the two ends of the first transmission shaft are respectively connected with a first transmission gear set in the two sets of opening and closing assemblies, the opening and closing motor drives the front sliding block to move through the first transmission gear set and simultaneously drives the rear sliding block to move in the opposite direction under the action of a pair of sector gears, so that the front mounting plate of the roller and the rear mounting plate of the roller are driven to be opened and closed; the main roller driving mechanism comprises a main roller motor, a second transmission shaft and two sets of second transmission gear sets, the main roller motor transmits power to the two sets of second transmission gear sets through the second transmission shaft, a power tail end output gear in the second transmission gear set is installed on a roller front installation plate, the end part of the main roller installed on the roller front installation plate is in power transmission with the power tail end output gear through a belt, other gears in the second transmission gear set except the power tail end output gear are installed on a roller rear installation plate, and the gear meshed with the power tail end output gear is also in power transmission with the end part of the main roller installed on the roller rear installation plate through the belt; vice roller actuating mechanism includes vice roller motor, the vice roller power gear and the universal joint of a pair of meshing, and a pair of vice roller power gear is installed respectively on two vice roller transmission shafts, the outside at one of them backup pad is all installed to vice roller motor and two vice roller transmission shafts, vice roller motor is connected through No. two belts and one of them vice roller transmission shaft transmission, and two vice roller transmission shafts pass through the universal joint and are connected with a pair of vice roller respectively.

Preferably, the double-layer traction roller device further comprises at least one fabric pull-down mechanism, wherein the fabric pull-down mechanism is arranged between the main roller and the auxiliary roller and comprises a front shield, a separation fixing block, a catching claw, a pull-down tension spring, a lifting transmission shaft and a lifting cam; the separating fixed blocks are arranged in a row and are uniformly arranged on the front protective cover at intervals, and a catching claw is arranged between every two adjacent separating fixed blocks; the catching claw is provided with a needle for hooking fabrics, an upper elongated guide through hole and a lower elongated guide through hole, two limiting steel wires penetrate through the row of separating fixed blocks, and the two limiting steel wires penetrate through the two guide through holes of all the catching claws respectively; every catches a extension spring for the lower pulling of claw configuration, and the one end of extension spring for the lower pulling is connected with catching the claw, and the other end of extension spring for the lower pulling is connected with separating the fixed block, the below of separating the fixed block in one row is installed to the transmission shaft for the lifting, the cam is installed on the transmission shaft for the lifting, and a cam for the lifting corresponds one and catches the claw, the transmission shaft for the lifting drives the cam for the lifting under power drive and rotates and then upwards the jacking catches the claw.

Preferably, a slot hole for exposing the needle on the catching claw is formed on the front side surface of the front shield.

Preferably, the power source of the lifting transmission shaft comes from the main roller motor, and two ends of the lifting transmission shaft are connected with the second transmission gear set.

Preferably, two ends of each main roller are respectively provided with a main roller belt tightening seat, and the main roller belt tightening seats are provided with pressing rollers which are in contact with the belt.

Preferably, a reset tension spring is arranged between the roller front mounting plate and the roller rear mounting plate which are positioned at the same end, one end of the reset tension spring is connected with the roller front mounting plate, and the other end of the reset tension spring is connected with the roller rear mounting plate;

preferably, a front baffle is arranged on the front side of the front mounting plates of the two roller rollers, and a rear baffle is arranged on the rear side of the rear mounting plates of the two roller rollers.

Preferably, the front slider is provided with a protruding plug, and the rear slider is provided with a notch for inserting the protruding plug.

Preferably, the sector gear comprises a circular gear body and a crank connected to the gear body, the end of the crank is of an arc structure, and arc notches for inserting the end of the crank are formed in the bottoms of the front sliding block and the rear sliding block.

Preferably, the first transmission gear set further comprises a first intermediate gear, a second intermediate gear and a third intermediate gear; the power starting end input gear, the first intermediate gear, the second intermediate gear, the third intermediate gear and the power tail end output gear are sequentially in meshed transmission connection; two ends of the first transmission shaft are respectively connected with the two first intermediate gears.

Preferably, the second transmission gear set further comprises a power starting end input gear, a fourth intermediate gear, a fifth intermediate gear, a sixth intermediate gear, a seventh intermediate gear, an eighth intermediate gear, a ninth intermediate gear and a tenth intermediate gear, wherein the power starting end input gear, the fourth intermediate gear, the fifth intermediate gear, the sixth intermediate gear, the seventh intermediate gear, the eighth intermediate gear, the ninth intermediate gear, the tenth intermediate gear and the power tail end output gear are sequentially in meshing transmission connection; two ends of the second transmission shaft are respectively connected with the power initial end input gear in the two sets of second transmission gear sets; and two ends of the lifting transmission shaft are respectively connected with a ninth intermediate gear in the two sets of second transmission gear sets.

Compared with the prior art, the invention has the following advantages and effects:

1. the power transmission of the main roller and the auxiliary roller adopts a mode of combining a motor with a transmission gear set, the gear transmission structure is simple, the occupied installation space is small, the transmission precision is high, the operation is stable, and the fault is not easy to occur;

2. the end parts of the pair of auxiliary roller rollers are in power transmission with the auxiliary roller motor through the universal joint, and even if the main roller and the auxiliary roller rollers are separated, the auxiliary roller rollers can continuously rotate to prevent cloth hanging;

3. the opening and closing mechanism is reasonable in design and simple in structure, the roller front mounting plates and the roller rear mounting plates at two ends can be opened and closed simultaneously through the pair of fan-shaped gears, openings at two ends can be kept consistent, a reset tension spring is arranged between the roller front mounting plate and the roller rear mounting plate, and after the roller front mounting plate and the roller rear mounting plate are closed, the reset spring ensures that the two roller front mounting plates and the two roller rear mounting plates cannot be separated during working;

4. the fabric pulling-down mechanism is designed, a power source of a transmission shaft for lifting in the fabric pulling-down mechanism is from a main roller motor and is linked with a main roller, and the main roller motor simultaneously drives the main roller and a catching claw to act so as to pull down and pull the fabric.

Drawings

In order to illustrate the embodiments of the present invention or the solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is another schematic perspective view of the embodiment of the present invention.

Fig. 3 is a schematic front view of the embodiment of the present invention.

Fig. 4 is an enlarged schematic view of a left-end partial structure in fig. 2.

Fig. 5 is a view illustrating an opening and closing mechanism in the embodiment of the present invention.

Fig. 6 is a schematic view of the main roller driving mechanism in the embodiment of the present invention.

Fig. 7 is a view illustrating a sub roller driving mechanism in the embodiment of the present invention.

Fig. 8 is a view illustrating a fabric pull-down mechanism in an embodiment of the present invention.

Fig. 9 is an expanded view of the catching claw of the cloth pulling-down mechanism in the embodiment of the present invention between two divided fixing blocks.

Figure 10 is a side view of a fabric pull down mechanism in an embodiment of the present invention.

Fig. 11 is a schematic view of the catching claw in a lifted state.

Fig. 12 is a schematic view of the catching claw pulling down the cloth by the tension spring for pulling down.

Fig. 13 is an expanded view illustrating the support plate, the roller front mounting plate, and the roller rear mounting plate.

Description of reference numerals: a main roller 1, an auxiliary roller 2, a roller front mounting plate 3, a roller rear mounting plate 4, a support plate 5, an opening and closing motor 6, a first transmission shaft 7, a front slide block 8, a protruding plug 81, a rear slide block 9, a notch 91, a fixed block 10, a sector gear 11, a gear body 111, a crank 112, a power tail end output gear 12 of a first transmission gear set, a power start end input gear 13 of the first transmission gear set, a main roller motor 14, a second transmission shaft 15, a power tail end output gear 16 of the second transmission gear set, an auxiliary roller motor 17, an auxiliary roller power gear 18, a universal joint 19, a second belt 20, an auxiliary roller transmission shaft 21, a cross beam 22, a front shield 23, a groove hole 231, a separation fixed block 24, a catching claw 25, a needle 251, a guide through hole 252, a tension spring 26 for pull-down, a transmission shaft 27 for lifting, a cam 28 for lifting, a main roller belt tightening seat 29, a guide plate for lifting a roller, The power transmission device comprises a reset tension spring 30, a first intermediate gear 31, a second intermediate gear 32, a third intermediate gear 33, a power starting end input gear 34 of a second transmission gear set, a fourth intermediate gear 35, a fifth intermediate gear 36, a sixth intermediate gear 37, a seventh intermediate gear 38, an eighth intermediate gear 39, a ninth intermediate gear 40, a tenth intermediate gear 41, a front baffle 42, a rear baffle 43 and a lifting gear 44.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

Examples

See fig. 1-13.

The embodiment discloses a double-layer traction roller device of a flat knitting machine, which comprises a pair of main roller rollers 1, a pair of auxiliary roller rollers 2, a roller front mounting plate 3, a roller rear mounting plate 4, a supporting plate 5, an opening and closing mechanism, a main roller driving mechanism, an auxiliary roller driving mechanism and a fabric pull-down mechanism.

In this embodiment, the two support plates 5 are arranged in parallel in a left-right direction and are fixedly mounted on the frame of the flat knitting machine. The pair of main roller rolls 1 are positioned above the pair of auxiliary roller rolls 2, the pair of main roller rolls 1 are arranged in parallel in tandem, the pair of auxiliary roller rolls 2 are arranged in parallel in tandem, and the pair of main roller rolls 1 and the pair of auxiliary roller rolls 2 can pull down and draw the fabric together.

In this embodiment, the front mounting plate 3 and the rear mounting plate 4 of the roller are identical in structure and are both provided with two, the front mounting plates 3 of the two roller are arranged in front of the rear mounting plates 4 of the two roller, the front mounting plates 3 of the two roller are connected through a cross beam 22, similarly, the rear mounting plates 4 of the two roller are also connected through a cross beam 22, a front baffle 42 is arranged on the front side of the front mounting plates 3 of the two roller, and a rear baffle 43 is arranged on the rear side of the rear mounting plates 4 of the two roller. Two ends of one main roller 1 and one auxiliary roller 2 are respectively and rotatably arranged on the two roller front mounting plates 3, and two ends of the other main roller 1 and the other auxiliary roller 2 are respectively and rotatably arranged on the two roller rear mounting plates 4.

In this embodiment, the opening and closing mechanism is used for driving the opening and closing of the front roller mounting plate 3 and the rear roller mounting plate 4, and further drives the opening and closing of the pair of main rollers 1 and the pair of auxiliary rollers 2. When weaving is started, the bottom lifting device needs to be lifted to pull the fabric downwards into the roller device, so that the roller needs to be opened to allow a space for lifting the bottom lifting device, and after normal weaving, the bottom lifting device is lowered, and the roller needs to be closed.

In this embodiment, the opening and closing mechanism includes an opening and closing motor 6, a first transmission shaft 7 and two sets of opening and closing assemblies, the opening and closing motor 6 drives the first transmission shaft 7, and two ends of the first transmission shaft 7 are respectively connected with the two sets of opening and closing assemblies and are used for transmitting power to the two sets of opening and closing assemblies. In this embodiment, two sets of opening and closing components are respectively arranged on one side of the two support plates 5, so that the two ends of the roller are opened and closed simultaneously, the openings at the two ends are kept consistent, and the condition that one end is opened largely and the other end is opened small is prevented.

In this embodiment, the subassembly that opens and shuts includes preceding slider 8, back slider 9, fixed block 10, a pair of sector gear 11 and drive gear group, fixed block 10 sets up two, be one-in-one behind one and install in one side of backup pad 5, preceding slider 8 and roller front mounting panel 3 fixed connection, back slider 9 and roller rear mounting panel 4 fixed connection, and preceding slider 8 and back slider 9 all have the spout, two fixed blocks 10 are located two spouts respectively, the same end of a pair of vice roller 2 passes behind backup pad 5, rotate respectively with preceding slider 8 and back slider 9 and be connected.

In this embodiment, the bottom of the front slider 8 is a rack structure, and the first transmission gear set comprises a power starting end input gear 13, a first intermediate gear 31, a second intermediate gear 32, a third intermediate gear 33 and a power tail end output gear 12 which are sequentially engaged and in transmission connection; two ends of the first transmission shaft 7 are respectively connected with two first intermediate gears 31, a power tail end output gear 12 in the first transmission gear set is meshed with the rack structure, and a power starting end input gear 13 in the first transmission gear set is meshed with a gear installed at the output end of the opening and closing motor 6.

In the embodiment, a pair of sector gears 11 are engaged and arranged at one side of the supporting plate 5, and the sector gears 11 are respectively connected with the front sliding block 8 and the rear sliding block 9; specifically, the sector gear 11 includes a circular gear body 111 and a crank 112 connected to the gear body 111, the end of the crank 112 is an arc structure, and the bottoms of the front slider 8 and the rear slider 9 are provided with arc notches into which the end of the crank 112 is inserted. The sector gears 11 are externally engaged, and the crank 112 can stir the front slide block 8 and the rear slide block 9 to move in opposite directions at the same time, so that the roller is opened and closed.

In this embodiment, the front slider 8 is provided with a protruding plug 81, and the rear slider 9 is provided with a notch 91 into which the protruding plug 81 is inserted. After the rollers are closed, the male plug 81 is inserted into the notch 91.

In the embodiment, a reset tension spring 30 is arranged between the roller front mounting plate 3 and the roller rear mounting plate 4 which are positioned at the same end, one end of the reset tension spring 30 is connected with the roller front mounting plate 3, and the other end of the reset tension spring 30 is connected with the roller rear mounting plate 4; after the front and the rear mounting plates of the roller are closed, the reset spring ensures that the front and the rear mounting plates of the two roller cannot be separated when the roller works.

In this embodiment, the working method of the opening and closing mechanism is as follows: firstly, the opening and closing motor 6 drives a first transmission gear set on one side, and simultaneously drives a first transmission gear set on the other side through a first transmission shaft 7, then a power tail end output gear 12 in the first transmission gear set drives the front sliding block 8 to move, and simultaneously drives the rear sliding block 9 to move in the opposite direction through a pair of sector gears 11, so that the roller front mounting plate 3 and the roller rear mounting plate 4 are driven to open and close.

In this embodiment, the driving mechanism of the main roller includes a main roller motor 14, a second transmission shaft 15 and two sets of second transmission gear sets, the main roller motor 14 transmits power to the two sets of second transmission gear sets through the second transmission shaft 15, and the second transmission gear set includes a power start end input gear 34, a fourth intermediate gear 35, a fifth intermediate gear 36, a sixth intermediate gear 37, a seventh intermediate gear 38, an eighth intermediate gear 39, a ninth intermediate gear 40, a tenth intermediate gear 41 and a power end output gear 16 which are sequentially engaged and connected in a transmission manner. Wherein, the power end output gear 16 is installed on the roller front mounting plate 3, the end of the main roller 1 installed on the roller front mounting plate 3 performs power transmission with the power end output gear 16 through a belt, the other gears in the second transmission gear set except the power end output gear 16 are installed on the roller rear mounting plate 4, and the gear engaged with the power end output gear 16 also performs power transmission with the end of the main roller 1 installed on the roller rear mounting plate 4 through a belt. Two ends of the second transmission shaft 15 are respectively connected with the power initial end input gear 34 in the two sets of second transmission gear sets; two ends of each main roller 1 are respectively provided with a main roller belt tightening seat 29, and a pressing roller is arranged on the main roller belt tightening seat 29 and is in contact with the belt.

In this embodiment, the auxiliary roller driving mechanism includes an auxiliary roller motor 17, a pair of engaged auxiliary roller power gears 18 and a universal joint 19, the pair of auxiliary roller power gears 18 are respectively installed on two auxiliary roller transmission shafts 21, the auxiliary roller motor 17 and the two auxiliary roller transmission shafts 21 are both installed on the outer side of one of the support plates 5, the auxiliary roller motor 17 is in transmission connection with one of the auxiliary roller transmission shafts 21 through a second belt 20, and the two auxiliary roller transmission shafts 21 are respectively connected with the pair of auxiliary roller 2 through the universal joint 19. The ends of the pair of auxiliary roller rollers are in power transmission with the auxiliary roller motor through the universal joint, and even if the main roller and the auxiliary roller rollers are separated, the auxiliary roller rollers can continuously rotate to prevent cloth hanging.

In this embodiment, the fabric pull-down mechanism is installed between the main roller 1 and the sub roller 2, and the fabric pull-down mechanism may be provided with one set or two sets, and the two sets of fabric pull-down mechanisms in this embodiment include a front shield 23, a partition fixing block 24, a catch claw 25, a pull-down tension spring 26, a lifting transmission shaft 27, and a lifting cam 28.

In this embodiment, the fixed separating blocks 24 are arranged in a row and are uniformly mounted on the front shield 23 at intervals, and two catching claws 25 are mounted between every two adjacent fixed separating blocks 24; the catching claws 25 are provided with needles 251 for hooking fabrics, and upper and lower elongated guide through holes 252 are arranged on the catching claws 25, and a row of separating fixed blocks 24 are provided with two limiting steel wires which respectively penetrate through the two guide through holes 252 of all the catching claws 25; the front side surface of the front guard 23 is provided with a slot 231 for exposing the needle 251 of the catch claw 25.

In this embodiment, each of the capturing claws 25 is provided with a pull-down tension spring 26, one end of the pull-down tension spring 26 is connected to the capturing claw 25, the other end of the pull-down tension spring 26 is connected to the partition fixing block 24, a lifting transmission shaft 27 is installed below the row of partition fixing blocks 24, a lifting cam 28 is installed on the lifting transmission shaft 27, one lifting cam 28 corresponds to one capturing claw 25, and the lifting transmission shaft 27 drives the lifting cam 28 to rotate under power driving to lift up the capturing claw 25.

In this embodiment, the power source of the lifting transmission shaft 27 comes from the main roller motor 14, two ends of the lifting transmission shaft 27 in one set of the fabric pull-down device are connected with the nine intermediate gears 40 in the two sets of the second transmission gear sets, two ends of the lifting transmission shaft 27 in the other set of the fabric pull-down device are provided with the lifting gears 44, and the lifting gears 44 are meshed with the power tail end output gear 16 in the second transmission gear set.

In this embodiment, in the lifting cams 28 mounted on the lifting transmission shaft 27, every adjacent three lifting cams 28 form a group, the three lifting cams 28 do not lift the catching claws 25 upward at the same time, that is, work alternately in sequence, the first lifting cam lifts the corresponding catching claw upward, then after the catching claw is put down, the second lifting cam starts working, and after the catching claw corresponding to the second lifting cam is put down, the third lifting cam starts working. Namely, a row of catching claws are divided into three groups which work alternately in turn to pull down the fabric. The pull-down force of the catch pawl is from the pull-down tension spring 26.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. All equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A double-layer traction roller device of a flat knitting machine comprises a pair of main roller rollers (1), a pair of auxiliary roller rollers (2), a roller front mounting plate (3), a roller rear mounting plate (4) and a support plate (5); the two support plates (5) are arranged in parallel in a left-right direction; the pair of main roller rollers (1) are positioned above the pair of auxiliary roller rollers (2), the pair of main roller rollers (1) are arranged in parallel in tandem, and the pair of auxiliary roller rollers (2) are arranged in parallel in tandem; the roller front mounting plates (3) and the roller rear mounting plates (4) are identical in structure and are respectively provided with two roller front mounting plates (3) which are arranged in front of the two roller rear mounting plates (4), the two roller front mounting plates (3) are connected through a cross beam (22), similarly, the two roller rear mounting plates (4) are also connected through a cross beam (22), two ends of one main roller (1) and one auxiliary roller (2) are respectively rotatably mounted on the two roller front mounting plates (3), and two ends of the other main roller (1) and the other auxiliary roller (2) are respectively rotatably mounted on the two roller rear mounting plates (4);

the method is characterized in that: the device also comprises an opening and closing mechanism, a main roller driving mechanism and an auxiliary roller driving mechanism;

the opening and closing mechanism is used for driving the opening and closing of the roller front mounting plate (3) and the roller rear mounting plate (4) and further driving the opening and closing of the pair of main rollers (1) and the pair of auxiliary rollers (2), the opening and closing mechanism comprises an opening and closing motor (6), a first transmission shaft (7) and two opening and closing assemblies, the opening and closing motor (6) drives the first transmission shaft (7), two ends of the first transmission shaft (7) are respectively connected with the two opening and closing assemblies and used for transmitting power to the two opening and closing assemblies, and the two opening and closing assemblies are respectively arranged on one side of the two supporting plates (5); the opening and closing assembly comprises a front sliding block (8), a rear sliding block (9), a fixed block (10), a pair of sector gears (11) and a first transmission gear set, wherein the two fixed blocks (10) are arranged on one side of the support plate (5), the front sliding block (8) and the rear sliding block (9) are both in sliding connection with the support plate (5), the front sliding block (8) is fixedly connected with the roller front mounting plate (3), the rear sliding block (9) is fixedly connected with the roller rear mounting plate (4), the front sliding block (8) and the rear sliding block (9) are both provided with sliding grooves, the two fixed blocks (10) are respectively positioned in the two sliding grooves, the same end of a pair of auxiliary rollers (2) penetrates through the support plate (5) and then is respectively in rotating connection with the front sliding block (8) and the rear sliding block (9), the bottom of the front sliding block (8) is of a rack structure, and the power tail end output gear (12) in the first transmission gear set is meshed with the rack structure, an input gear (13) at the power starting end in the first transmission gear set is meshed with a gear installed at the output end of the opening and closing motor (6); the pair of sector gears (11) are meshed and mounted on one side of the supporting plate (5), and the pair of sector gears (11) are respectively connected with the front sliding block (8) and the rear sliding block (9); two ends of the first transmission shaft (7) are respectively connected with a first transmission gear set in the two sets of opening and closing assemblies, the opening and closing motor (6) drives the front sliding block (8) to move through the first transmission gear set and simultaneously drives the rear sliding block (9) to move in the opposite direction under the action of the pair of sector gears (11), so that the roller front mounting plate (3) and the roller rear mounting plate (4) are driven to be opened and closed;

the main roller driving mechanism comprises a main roller motor (14), a second transmission shaft (15) and two sets of second transmission gear sets, the main roller motor (14) transmits power to the two sets of second transmission gear sets through the second transmission shaft (15), the power tail end output gear (16) in the second transmission gear set is arranged on the roller front mounting plate (3), the end part of the main roller (1) arranged on the roller front mounting plate (3) is in power transmission with the power tail end output gear (16) through a belt, other gears in the second transmission gear set except the power tail end output gear (16) are arranged on the roller rear mounting plate (4), the gear meshed with the power tail end output gear (16) is also in power transmission with the end part of the main roller (1) arranged on the roller rear mounting plate (4) through a belt;

vice roller actuating mechanism includes vice roller motor (17), vice roller power gear (18) and universal joint (19) of a pair of meshing, installs respectively on two vice roller transmission shafts (21) a pair of vice roller power gear (18), the outside in one of them backup pad (5) is all installed in vice roller motor (17) and two vice roller transmission shafts (21), vice roller motor (17) are connected through No. two belt (20) and vice roller transmission shaft (21) transmission among them, and two vice roller transmission shafts (21) are connected with a pair of vice roller (2) respectively through universal joint (19).

2. The double-layer traction roller device of the flat knitting machine according to claim 1, characterized in that: the double-layer traction roller device also comprises at least one fabric pull-down mechanism, wherein the fabric pull-down mechanism is arranged between the main roller (1) and the auxiliary roller (2) and comprises a front shield (23), a separation fixing block (24), a catching claw (25), a pull-down tension spring (26), a lifting transmission shaft (27) and a lifting cam (28); the separation fixed blocks (24) are arranged in a row and are uniformly arranged on the front shield (23) at intervals, and a catching claw (25) is arranged between every two adjacent separation fixed blocks (24); the catching claws (25) are provided with needles (251) for hooking fabrics, upper and lower elongated guide through holes (252) are formed in the catching claws (25), two limiting steel wires penetrate through the row of separating fixed blocks (24), and the two limiting steel wires penetrate through the two guide through holes (252) of all the catching claws (25) respectively; every catches claw (25) configuration and draws down with extension spring (26), and the one end of drawing spring (26) is drawn down with catching claw (25) and be connected, and the other end that draws down with extension spring (26) is connected with separating fixed block (24), the below at one row of separating fixed block (24) is installed with transmission shaft (27) to the lifting, install on transmission shaft (27) is used in the lifting with cam (28) to the lifting, and one cam (28) for the lifting corresponds one and catches claw (25), transmission shaft (27) is used in the lifting drives cam (28) for the lifting under power drive and rotates and then upwards jacking and catches claw (25).

3. The double-layer traction roller device of the flat knitting machine according to claim 2, characterized in that: the front side surface of the front shield (23) is provided with a slotted hole (231) which can expose the needle (251) on the catching claw (25).

4. The double-layer traction roller device of the flat knitting machine according to claim 2, characterized in that: the power source of the lifting transmission shaft (27) comes from the main roller motor (14), and two ends of the lifting transmission shaft (27) are connected with the second transmission gear set.

5. The double-layer traction roller device of the flat knitting machine according to claim 1, characterized in that: two ends of each main roller (1) are respectively provided with a main roller belt tightening seat (29), and a pressing roller is arranged on each main roller belt tightening seat (29) and is in contact with the belt.

6. The double-layer traction roller device of the flat knitting machine according to claim 1, characterized in that: a reset tension spring (30) is arranged between the roller front mounting plate (3) and the roller rear mounting plate (4) which are positioned at the same end, one end of the reset tension spring (30) is connected with the roller front mounting plate (3), and the other end of the reset tension spring (30) is connected with the roller rear mounting plate (4);

and/or a front baffle (42) is arranged on the front side of the front mounting plates (3) of the two roller rolls, and a rear baffle (43) is arranged on the rear side of the rear mounting plates (4) of the two roller rolls.

7. The double-layer traction roller device of the flat knitting machine according to claim 1, characterized in that: the front sliding block (8) is provided with a convex plug (81), and the rear sliding block (9) is provided with a notch (91) for the convex plug (81) to insert.

8. The double-layer traction roller device of the flat knitting machine according to claim 1, characterized in that: the sector gear (11) comprises a circular gear body (111) and a crank (112) connected to the gear body (111), the end of the crank (112) is of an arc-shaped structure, and arc-shaped gaps for inserting the end of the crank (112) are formed in the bottoms of the front sliding block (8) and the rear sliding block (9).

9. The double-layer traction roller device of the flat knitting machine according to claim 1, characterized in that: the first transmission gear set also comprises a first intermediate gear (31), a second intermediate gear (32) and a third intermediate gear (33); the power starting end input gear (13), the first intermediate gear (31), the second intermediate gear (32), the third intermediate gear (33) and the power tail end output gear (12) are sequentially in meshed transmission connection; two ends of the first transmission shaft (7) are respectively connected with the two first intermediate gears (31).

10. The double-layer traction roller device of the flat knitting machine according to claim 2, characterized in that: the second transmission gear set further comprises a power starting end input gear (34), a fourth intermediate gear (35), a fifth intermediate gear (36), a sixth intermediate gear (37), a seventh intermediate gear (38), an eighth intermediate gear (39), a ninth intermediate gear (40) and a tenth intermediate gear (41), wherein the power starting end input gear (34), the fourth intermediate gear (35), the fifth intermediate gear (36), the sixth intermediate gear (37), the seventh intermediate gear (38), the eighth intermediate gear (39), the ninth intermediate gear (40), the tenth intermediate gear (41) and the power tail end output gear (16) are sequentially in meshing transmission connection; two ends of the second transmission shaft (15) are respectively connected with the power initial end input gear (34) in the two sets of second transmission gear sets; and two ends of the lifting transmission shaft (27) are respectively connected with a ninth intermediate gear (40) in the two sets of second transmission gear sets.