Double servo reciprocating drive structure and electronic jacquard machine with the same

Abstract

The invention relates to a dual-servo reciprocating drive structure and an electronic jacquard machine having such a structure. The drive structure is characterized by comprising two servo motors arranged front and back and controlled by an electronic control system, the two motors rotating in opposite directions and at different angles; the two motors drive and connect two transmission shafts, which drive and control two sets of chain transmission mechanisms, each set of chain transmission mechanisms consisting of a driving sprocket, a driven sprocket, and a chain, the chain having two side straight sections, two frames arranged on either side of the chain transmission mechanism, the upper ends of the frames connected to the chain transmission mechanism via a connecting seat assembly, and the lower ends connected to a broach via a pull rod; one frame is connected to a pair of side straight sections of the two chains that rise and fall in the same direction via its front and rear connecting ends; the other frame is connected to another pair of side straight sections of the two chains that rise and fall in the same direction via its front and rear connecting ends. The invention has a low center of gravity, stable operation, and light inertia, and the jacquard opening size can be adjusted as needed.

Description

Technical Field

[0001] The invention relates to a driving structure and a transmission structure of a jacquard machine, and belongs to the technical field of textile machinery structures. Background Art

[0002] An electronic jacquard is a shedding device used in the textile industry. The jacquard's broaching mechanism drives the core components up and down, driving the harness yarns to shed the warp yarns. Currently, electronic jacquards on the market include chain, cam, connecting rod, and eccentric wheel structures. These various structures present significant challenges, including high vibration, noise, high inertia, fragility, maintenance difficulties, and complex shedding adjustments, often failing to fully meet customer needs.

[0003] The electronic jacquard machine with a new structure of dual servo reciprocating drive of the present invention can well realize the advantages of low center of gravity, stable operation, low noise, light inertia, easy maintenance, and arbitrary adjustment of the opening according to customer and weaving requirements. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned problems and provides a dual-servo reciprocating drive structure and an electronic jacquard machine having the structure.

[0005] The technical solution adopted in the present invention is:

[0006] The dual servo reciprocating drive structure is special in that it includes:

[0007] Dual servo motors, including two servo motors placed in juxtaposition, both controlled by an electronic control system, with opposite rotations and a predetermined rotation angle difference;

[0008] Dual drive shafts, including two drive shafts placed front and back, each driven by two servo motors;

[0009] Two sets of chain transmission mechanisms are driven and controlled by two transmission shafts respectively. Each set of chain transmission mechanisms consists of a driving sprocket, a driven sprocket and a chain. The transmission torque of the driving sprocket comes from the transmission shaft. The chain has two parallel side straight sections as traction parts;

[0010] The two frames are respectively arranged on both sides of the two sets of chain transmission mechanisms, with their upper ends connected to the chain transmission mechanisms via a connecting seat assembly, and their lower ends connected to a broach through a pull rod; among them, the frame plate on one side is connected to a pair of side straight sections of the two chains that rise and fall in the same direction through two front and rear connecting ends; the frame plate on the other side is connected to the other pair of side straight sections of the two chains that rise and fall in the same direction through two front and rear connecting ends.

[0011] The connecting seat assembly comprises an upper seat connected with the chain, a lower seat connected with the frame plate, and an adjusting screw connected between the upper seat and the lower seat.

[0012] The driving sprocket of the chain transmission mechanism is installed on the transmission shaft through a locking sleeve.

[0013] An electronic jacquard machine is special in that it comprises the above-mentioned double servo reciprocating drive structure.

[0014] The dual-servo reciprocating drive structure and electronic jacquard loom incorporating such a structure utilize dual servo motors as the loom's power output, which is sequentially transmitted via a drive shaft and sprockets to an endless chain. The two juxtaposed endless chains are driven by the reciprocating straight sections of the endless chains, which drive the reciprocating movement of the two frame plates, thereby driving the broaches in an upward and downward reciprocating motion, thereby achieving the loom's shedding function. The dual servo motors are controlled by an electronic control system, effectively controlling the reciprocating angles of the servo motors. This mechanical transmission structure allows for arbitrary adjustment of the front and rear shedding size, thereby achieving the diagonal shedding function of jacquard weaving, with a smaller front and larger rear shedding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : Schematic diagram of the overall structure of the embodiment 1;

[0016] Figure 2 : Schematic diagram of dual servo reciprocating drive structure;

[0017] In the figure, 10, front servo motor, 11, front coupling, 12, front drive shaft, 13, front locking sleeve, 14, front driving sprocket, 15, front drive chain, 16, front driven sprocket, 17, front upper seat, 18, front adjusting screw, 19, front lower seat, 20, rear servo motor, 21, rear coupling, 22, rear drive shaft, 23, rear locking sleeve, 24, rear driving sprocket, 25, rear drive chain, 26, rear driven sprocket, 27, rear upper seat, 28, rear adjusting screw, 29, rear lower seat, 30a, outer frame plate, 30b, inner frame plate, 40, pull rod, 41, broach. DETAILED DESCRIPTION

[0018] The invention will be described in detail below with reference to the accompanying drawings.

[0019] Example 1

[0020] This embodiment relates to a dual servo reciprocating drive structure, such as Figure 1As shown, its structure includes a front servo drive assembly and a rear servo drive assembly mounted on a base, one in front of the other, with a predetermined spacing therebetween. It also includes an outer frame plate 30a and an inner frame plate 30b, which are jointly driven and controlled by the dual servo drive assemblies. The upper portions of the outer frame plate 30a and the inner frame plate 30b are connected to the dual servo drive assemblies via front and rear connection ends, respectively. The lower portions of the outer frame plate 30a and the inner frame plate 30b are connected to broaches 50 via respective pull rods 40. The function is set as follows: the front servo drive assembly drives the front shedding, while the rear servo drive assembly drives the rear shedding, achieving a diagonal shedding function with a smaller front opening and a larger rear opening.

[0021] The structures of the front servo drive assembly and the rear servo drive assembly are described in detail below.

[0022] The front servo drive assembly includes a front servo motor 10, a front coupling 11, a front transmission shaft 12, a front locking sleeve 13, a front driving sprocket 14, a front drive chain 15, a front driven sprocket 16, a front connecting seat assembly 1, and a front connecting seat assembly 2; wherein, the front servo motor 10 is connected to the front transmission shaft 12 through the front coupling 11 output, the front driving sprocket 14 is installed on the front transmission shaft 12 through the front locking sleeve 13, the front drive chain 15 is transmission-connected between the front driving sprocket 14 and the front driven sprocket 16, and the front drive chain 15 has lifting straight sections on both sides, the lifting straight section on one side is connected to the front end of the outer frame plate 30a via the front connecting seat assembly 1, serving as the front drive chain of the outer frame plate 30a, and the lifting straight section on the other side is connected to the front end of the inner frame plate 30b via the front connecting seat assembly 2, serving as the front drive chain of the inner frame plate 30b.

[0023] The front connecting seat assembly 1 and the front connecting seat assembly 2 have the same structure, both including a front upper seat 17, a front adjusting screw 18 and a front lower seat 19, wherein the front upper seat 17 is connected to the straight sections on both sides of the front drive chain 15, the front adjusting screw 18 is connected to the lower end of the front upper seat 17, the upper end of the front lower seat 19 is connected to the front adjusting screw 18, and the lower end is connected to the outer frame plate 30a or the inner frame plate 30b.

[0024] The rear servo drive assembly includes a rear servo motor 20, a rear coupling 21, a rear transmission shaft 22, a rear locking sleeve 23, a rear driving sprocket 24, a rear drive chain 25, a rear driven sprocket 26, a rear upper seat 27, a rear adjusting screw 28, and a rear lower seat 29; wherein, the rear servo motor 20 is connected to the rear transmission shaft 22 through the rear coupling 21 output, the rear driving sprocket 24 is installed on the rear transmission shaft 22 through the rear locking sleeve 23, the rear drive chain 25 is transmission-connected between the rear driving sprocket 24 and the rear driven sprocket 26, and the rear drive chain 25 has lifting straight sections on both sides, the lifting straight section on one side is connected to the rear end of the outer frame plate 30 via the rear connecting seat assembly 1, serving as the rear drive chain of the outer frame plate 30a, and the lifting straight section on the other side is connected to the rear end of the inner frame plate 30b via the connecting seat assembly 2, serving as the rear drive chain of the inner frame plate 30b.

[0025] The structures of the rear connecting seat assembly 1 and the rear connecting seat assembly 2 are the same, both including a rear upper seat 27, a rear adjusting screw 28 and a rear lower seat 29, wherein the rear upper seat 27 is connected to the straight sections on both sides of the rear drive chain 25, the rear adjusting screw 28 is connected to the lower end of the rear upper seat 27, the upper end of the rear lower seat 29 is connected to the rear adjusting screw 28, and the lower end is connected to the outer frame plate 30a or the inner frame plate 30b.

[0026] The basic design concept and motion principle of this embodiment are described below:

[0027] In this embodiment, both the front and rear servo motors are controlled by an electronic control system. By designing different rotation angles and speeds, the drive shaft and chain undergo reciprocating motion. The servo motor drives the drive shaft through a coupling, and locking sleeves secure the driving sprockets to the ends of the shaft on both sides. The reciprocating rotation of the drive shaft drives the driving sprockets to rotate back and forth. The driving sprocket is fixed in position, while the position of the driven sprocket is adjustable, allowing the chain to be stably transmitted between the two sprockets. The reciprocating rotation of the driving sprocket drives the straight sections on both sides of the chain to move up and down, thereby driving the frame, pull rod, and broach at the lower end to move up and down. This in turn realizes the opening function of the electronic jacquard machine. The dual servo motors are controlled by an electronic control system, which can effectively control the reciprocating angle of the servo motors, thereby achieving arbitrary adjustment of the front and rear opening size through the mechanical transmission structure.

[0028] The action process of the dual servo drive mechanism in this embodiment to realize the inclined opening with a small front and a large rear is described as follows:

[0029] First, the rear servo motor 20 and the front servo motor 10 are controlled by the electronic control system so that their directions are opposite, and the rotation angle of the rear servo motor 20 is greater than the rotation angle of the front servo motor 10, so that the rotation angle of the rear drive shaft 22 is greater than the rotation angle of the front drive shaft 12, and the rotation angle of the rear drive chain 25 is greater than the rotation angle of the front drive chain 15, so that the rear drive chain stroke of the outer frame plate 30a is greater than the front drive chain stroke of the outer frame plate 30a, and the up and down reciprocating motion stroke of the rear end of the outer frame plate 30a is greater than the up and down reciprocating motion stroke of the front end of the outer frame plate 30a, and finally the front and rear ends of the outer frame plate are level when in the high position, and the movement distance of the rear end of the outer frame plate is greater than the movement distance of the front end of the outer frame plate when in the low position, realizing the function of the front small and rear large inclined opening.

[0030] The movement of the inner frame plate and the outer frame plate is the same as above and will not be repeated here.

Claims

1. Double servo reciprocating drive structure, characterized in that: include: Dual servo motors, including two servo motors placed in juxtaposition, both controlled by an electronic control system, with opposite rotations and a predetermined rotation angle difference; Dual drive shafts, including two drive shafts placed front and back, each driven by two servo motors; Two sets of chain transmission mechanisms are driven and controlled by two transmission shafts respectively. Each set of chain transmission mechanisms consists of a driving sprocket, a driven sprocket and a chain. The transmission torque of the driving sprocket comes from the transmission shaft. The chain has two parallel side straight sections as traction parts; Two frame plates are respectively arranged on both sides of the two sets of chain transmission mechanisms, with their upper ends connected to the chain transmission mechanisms via a connecting seat assembly, and their lower ends connected to a broach via a pull rod; wherein, the frame plate on one side is connected to a pair of side straight sections of the two chains that rise and fall in the same direction through two front and rear connecting ends; the frame plate on the other side is connected to the other pair of side straight sections of the two chains that rise and fall in the same direction through two front and rear connecting ends; The connecting seat assembly includes an upper seat connected to the chain, a lower seat connected to the frame plate, and an adjusting screw connected between the upper seat and the lower seat; The driving sprocket of the chain transmission mechanism is installed on the transmission shaft through a locking sleeve.

2. An electronic jacquard machine, characterized in that: It has the dual servo reciprocating drive structure as claimed in claim 1.

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