Transmission device of jacquard machine directly driven by permanent magnet alternating current synchronous servo motor and jacquard machine

Abstract

The invention discloses a transmission device of a jacquard machine directly driven by permanent magnet alternating-current synchronous servo motors and the jacquard machine. A first permanent magnet alternating-current synchronous servo motor and a second permanent magnet alternating-current synchronous servo motor are fixed at two end sides of a longitudinal rear bottom beam or two end sides of a longitudinal front bottom beam or are fixed in a crossed manner; a first eccentric wheel, a first connecting rod I and a first swing shaft arm are arranged between the first motor and the first swing shaft, an inner hole of the first eccentric wheel is fixed to a shaft extension head of the first rotor shaft, and the shaft extension section length is matched with the hole depth of the first eccentric wheel. A second eccentric wheel, a second connecting rod I and a second swing shaft arm are arranged between the second motor and the second swing shaft, an inner hole of the second eccentric wheel is fixed to a shaft extension head of a second rotor shaft, the shaft extension section length is matched with the hole depth of the second eccentric wheel, one end of the second connecting rod I is fixedly connected with the second eccentric wheel, and the other end of the second connecting rod I is hinged to the second swing shaft arm. No independently-arranged input shaft is arranged, the structure is simple, and the cantilever problem of the motor shaft is solved.

Description

Technical Field

[0001] The invention relates to a transmission device of a jacquard machine directly driven by a permanent magnet AC synchronous servo motor, belonging to the technical field of jacquard opening power direct supply transmission. Background Art

[0002] The input shaft for the jacquard machine is usually a transmission shaft in the form of a long shaft, such as the chain jacquard machine disclosed in CN101476190A. Figure 1 and Figure 2 In the chain jacquard machine of the present invention, a left and right wallboard 12 is arranged on the frame 15. A transmission shaft 1 is installed on the left and right wallboards 12. This single transmission shaft 1 is the manifestation of the long axis. The transmission shaft 1 is parallel to the broach 11 and the beam of the frame 15, that is, it is roughly consistent with the weft direction of the loom. The transmission shaft 1 needs to be driven by the power of the loom through the universal vertical shaft (not shown) and the upper bevel gear box (not shown) to realize rotation. However, in recent years, in the jacquard opening machinery manufacturing industry, the market has been pushing for a non-universal vertical shaft jacquard machine, that is, the jacquard machine adopts an independent drive instead of sharing the power source of the loom. The mainstream structural form is that the servo motor transmits the movement to the drive shaft through the reduction transmission mechanism, and the output shaft (servo motor output shaft) and the transmission input shaft are split shafts. Although the universal vertical shaft and the bevel gear box are cancelled, that is, the reversing transmission function is cancelled, the gear reduction transmission function is still retained. It is just that the bevel gear reduction transmission structure between the intersecting shafts is replaced by the gear reduction transmission between the parallel shafts. However, the gear reduction transmission generally has the problem of low efficiency due to meshing clearance accompanied by high noise, wear and transmission loss. For example, the power transmission and reduction device of the servo motor direct-driven jacquard machine disclosed in CN117845398A is coaxially connected to the pinion shaft through the clamp 112 coupling under the unilateral drive of a single motor shaft 11, so that the motor shaft 11 and the pinion shaft constitute an output long shaft structure, and the motor shaft 11 and the camshaft 3 (transmission input shaft) are parallel to each other to constitute a split shaft. Among them, the motor shaft 11 is supported at two points by two bearings located in the motor housing (not shown), and the pinion shaft is supported at two points by two bearings. The use of a coupling for inter-axis connection not only has a complex structure and high cost, but is also restricted by coaxiality and thus has an insurmountable coaxiality error; the left shaft end of the input camshaft 3 is supported on the jacquard right wall panel 4 of the frame through the camshaft left support bearing 31, and the camshaft 3 is also supported on the cam box cover 22 through the camshaft middle support bearing 33 and is further supported on the gear box 5 through the camshaft right support bearing 34. As a result of this three-point support design, the bearings are prone to premature damage.

[0003] The power device of the jacquard machine directly driven by a permanent magnet motor disclosed in CN117364324A adopts a single permanent magnet motor (single-side drive); the left end of the jacquard machine power input camshaft 4 is supported on the jacquard machine wallboard 3 of the base frame beam 1 by the left support bearing (unnumbered) of the jacquard machine power input camshaft, and the jacquard machine power input camshaft 4 is also supported on the right cover plate 22 of the cam box through the bearing of the jacquard machine power input camshaft support bearing seat 44 to achieve the purpose of double-point support, and the jacquard machine power input camshaft cantilever section 41 needs to be installed in the inner hole of the rotor 52 of the motor, which not only has the disadvantage of inconvenient installation, but also, in particular, no bearing can be set in the housing of the permanent magnet motor, that is, no shaft can be passed through The bearing is used to support the cantilever section 41 of the jacquard machine power input cam shaft located in the shell. This is because the common sense of mechanical design does not allow additional bearing support to be set on a rotating shaft based on the aforementioned two-point support. Once more than two points of support are formed to form a multi-point support form, it will cause early damage to the bearing; the jacquard machine power input cam shaft 4 is a long axis structure, and its total length starts from the left axis end located at the jacquard machine wall panel 3. The axis runs through the cam box and extends into the inner hole of the rotor, through the stator and out of the motor housing. Among them, the objective existence of the cantilever section 41 of the jacquard machine power input cam shaft leads to the insurmountable deficiency of weak rotation stability of the jacquard machine power input cam shaft 4. Obviously, its practicality and economy are poor. Summary of the invention

[0004] The object of the present invention is to provide a transmission device for a jacquard machine directly driven by a permanent magnet AC synchronous servo motor without a reduction transmission chain or a separately arranged transmission input shaft, so that the structure of the device is simple and the cantilever problem of the rotor shaft driven by the motor is eliminated.

[0005] To this end, the present invention relates to a transmission device of a jacquard machine directly driven by a permanent magnet AC synchronous servo motor, comprising a permanent magnet AC synchronous servo motor, a first swing shaft and a second swing shaft, the first swing shaft and the second swing shaft are parallel to each other and are respectively supported on a longitudinal front bottom beam and a longitudinal rear bottom beam, the first swing shaft and the second swing shaft extend between the longitudinal front bottom beam and the longitudinal rear bottom beam respectively, and the improvement lies in that: the permanent magnet AC synchronous servo motor is divided into a first permanent magnet AC synchronous servo motor and a second permanent magnet AC synchronous servo motor, which are fixed on both end sides of the longitudinal rear bottom beam, or fixed on both end sides of the longitudinal front bottom beam, or one of the first permanent magnet AC synchronous servo motor and the second permanent magnet AC synchronous servo motor is fixed on one end side of one of the longitudinal front bottom beam and the longitudinal rear bottom beam and the other motor is fixed on the other end side of the other bottom beam, and a first connecting member is provided between the first permanent magnet AC synchronous servo motor and the first swing shaft. Mechanism, the first connecting mechanism includes a first eccentric wheel, a first connecting rod I and a first swing shaft arm, the first swing shaft arm is fixed to the end of the first swing shaft, the inner hole of the first eccentric wheel is directly fixed to the shaft extension head of the first rotor shaft, and the axial length of the shaft extension head of the first rotor shaft is adapted to the inner hole depth of the first eccentric wheel, one end of the first connecting rod I is fixedly connected to the first eccentric wheel and the other end thereof is hinged to the first swing shaft arm, a second connecting mechanism is arranged between the second permanent magnet AC synchronous servo motor and the second swing shaft, the second connecting mechanism includes a second eccentric wheel, a second connecting rod I and a second swing shaft arm, the second swing shaft arm is fixed to the end of the second swing shaft, the inner hole of the second eccentric wheel is directly fixed to the shaft extension head of the second rotor shaft, and the axial length of the shaft extension head of the second rotor shaft is adapted to the inner hole depth of the second eccentric wheel, one end of the second connecting rod I is fixedly connected to the second eccentric wheel and the other end thereof is hinged to the second swing shaft arm.

[0006] Preferably, the first rotor shaft extension head is also coaxially fixed with a first counterweight, and the axial length of the first rotor shaft extension head is adapted to the inner hole depth of the first eccentric wheel and the inner hole depth of the first counterweight; the second rotor shaft extension head is also coaxially fixed with a second counterweight, and the axial length of the second rotor shaft extension head is adapted to the inner hole depth of the second eccentric wheel and the inner hole depth of the second counterweight.

[0007] The first eccentric wheel, the first counterweight block and the first connecting rod I as well as the second eccentric wheel, the second counterweight block and the second connecting rod I can be disassembled and replaced with the first control crank and the first connecting rod II as well as the second control crank and the second connecting rod II, and are correspondingly connected between the first rotor shaft extension head and the first swing shaft arm of the first permanent magnet AC synchronous servo motor, and are correspondingly connected between the second rotor shaft extension head and the second swing shaft arm of the second permanent magnet AC synchronous servo motor, wherein the first control crank includes a first control crank inner hole and a first control crank inner hole. Crank shaft head, the first control crank inner hole is fastened to the first rotor shaft shaft extension head, and the axial length of the first rotor shaft extension head is adapted to the depth of the first control crank inner hole, and the first control crank shaft head is hinged to the first connecting rod II; the second control crank includes the second control crank inner hole and the second control crank shaft head, the second control crank inner hole is fastened to the second rotor shaft extension head, and the axial length of the second rotor shaft extension head is adapted to the depth of the second control crank inner hole, and the second control crank shaft head is hinged to the second connecting rod II. After adopting the above scheme, the first minimalist interchange of one machine with two types, namely, the eccentric wheel drive type jacquard machine and the crank drive type jacquard machine, is realized. This minimalist interchange does not require the disassembly of the permanent magnet AC synchronous servo motor, the swing mechanism including the swing shaft, the knife lifting mechanism including the knife lifting mechanism and the double longitudinal bottom beams of the jacquard machine frame. Since the swing shaft arms in the two types of jacquard machines are universal, there is no need to disassemble the swing shaft arms. When a weaving scene that requires a larger torque transmission output is replaced with an eccentric wheel drive type jacquard machine, and when a higher speed and lower power consumption are required, the eccentric wheel drive type jacquard machine is replaced with a crank drive type jacquard machine, and finally the minimalist interchangeability of the two jacquard machine transmission types is achieved.

[0008] Furthermore, a first counterweight is fixed on the first control crank at one end of the inner hole of the first control crank opposite to the first control crank shaft head; a second counterweight is fixed on the second control crank at one end of the inner hole of the second control crank opposite to the second control crank shaft head; the first counterweight and the second counterweight are positioned relative to each other. After each control crank is provided with a counterweight, better balance can be obtained, especially the impact vibration suffered by the rotor shaft can be reduced.

[0009] The first counterweight portion and the first control crank are integrally formed, and the second counterweight portion and the second control crank are integrally formed.

[0010] Another subject of the present invention is to provide a jacquard machine equipped with the transmission device of the jacquard machine directly driven by the permanent magnet AC synchronous servo motor according to the present invention as mentioned above.

[0011] The technical effect of the technical solution provided by the present invention is that: the dual-side drive of the dual permanent magnet AC synchronous servo motor is combined with the basic configuration that the input shaft and the output shaft on each side are the same shaft and are short shafts, so that the present invention has four inseparable overall features: dual-side drive structure, input and output coaxial structure, non-reduction transmission structure and coaxial output-input shaft as short shaft. Among them,

[0012] The double-sided drive transmission devices are arranged spaced apart from each other, which not only ensures good dynamic balance and low vibration of the jacquard machine, but also balances the noise distribution; the coaxial input and output reflect a simple structure, and the rotor shaft has both output and input functions, and the mounting structure with the eccentric wheel is simple; the coaxial output shaft and input shaft are short shafts (especially the shaft head of the rotor shaft extending out of the motor housing is extremely short), which eliminates the cantilever state of the rotor shaft, and the rotor shaft has strong operating stability. The rotor shaft extension head does not need to be additionally provided with a coaxial connection structure with a coupling and a connecting coaxial support structure, and the resulting lack of coaxiality can be avoided; after canceling the reduction transmission, such as the gear reduction transmission structure, the common problem of low efficiency caused by meshing clearance accompanied by high noise, wear and transmission loss can be eliminated.

[0013] In summary, the present invention overcomes the technical prejudice of those skilled in the art, that is, it eliminates the defects of the existing jacquard machine, such as the need to separately set up a transmission input shaft, the transmission input shaft and the drive output shaft being configured as separate shafts, and the transmission input shaft being a cantilevered long shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a stereoscopic diagram of the transmission device of the jacquard machine directly driven by the permanent magnet AC synchronous servo motor;

[0015] Figure 2 According to the present invention Figure 1 A perspective view of the device from another perspective (equipped with a counterweight);

[0016] Figure 3 It is another type of front view of the present invention;

[0017] Figure 4 yes Figure 3 A top view of

[0018] Figure 5 yes Figure 3 Stereoscopic image of

[0019] Figure 6 yes Figure 5 A stereogram from another perspective;

[0020] Figure 7 yes Figure 3 Right view of;

[0021] Figure 8It is a front view of the first and second permanent magnet AC synchronous servo motors of the present invention;

[0022] Fig. 9 yes Figure 8 Right view of;

[0023] Fig.10 yes Figure 8 A top view of

[0024] Fig.11 yes Figure 3 A front view of the first and second control cranks;

[0025] Fig.12 yes Fig.11 Side view of

[0026] Fig.13 yes Fig.11 Stereoscopic diagram. DETAILED DESCRIPTION

[0027] Figure 1 , 2 The transmission device of the jacquard machine directly driven by the permanent magnet AC synchronous servo motor schematically shown in the figure comprises a permanent magnet AC synchronous servo motor, a first swing shaft 4L and a second swing shaft 4R. The first swing shaft 4L and the second swing shaft 4R are parallel to each other in the transverse direction and are supported on the longitudinal front bottom beam 1F and the longitudinal rear bottom beam 1B respectively. The longitudinal front bottom beam 1F and the longitudinal rear bottom beam 1B are parallel to each other, and the longitudinal front bottom beam 1F corresponds to the front part 5F of the shed of the jacquard machine, while the longitudinal rear bottom beam 1B corresponds to the rear part 5B of the shed of the jacquard machine. The first swing shaft 4L and the second swing shaft 4R extend between the longitudinal front bottom beam 1F and the longitudinal rear bottom beam 1B respectively. The permanent magnet AC synchronous servo motor is divided into a first permanent magnet AC synchronous servo motor 2L and a second permanent magnet AC synchronous servo motor 2R. The first permanent magnet AC synchronous servo motor 2L is fixed on the longitudinal One end side of the rear bottom beam 1B (the left end side is shown in the figure) and the second permanent magnet AC synchronous servo motor 2R is fixed to the other end side of the longitudinal rear bottom beam 1B (the right end side is shown in the figure), or the first permanent magnet AC synchronous servo motor 2L is fixed to one end side of the longitudinal front bottom beam 1F and the second permanent magnet AC synchronous servo motor 2R is fixed to the other end side of the longitudinal front bottom beam 1F, or one of the first permanent magnet AC synchronous servo motor 2L and the second permanent magnet AC synchronous servo motor 2R is fixed to one end side of one of the longitudinal front bottom beam 1F and the longitudinal rear bottom beam 1B and the other motor is fixed to the other end side of the other bottom beam. For example, when the first permanent magnet AC synchronous servo motor 2L is fixed to the left end side of the longitudinal front bottom beam 1F, the second permanent magnet AC synchronous servo motor 2R is fixed to the right end side of the longitudinal rear bottom beam 1B.

[0028] A first connecting mechanism is provided between the first permanent magnet AC synchronous servo motor 2L and the first swing shaft 4L, the first connecting mechanism includes a first eccentric wheel 31'L, a first connecting rod I 32'L and a first swing shaft arm 33L, the first swing shaft arm 33L is fixed to the end of the first swing shaft 4L, the inner hole of the first eccentric wheel 31'L is directly fixed on the first rotor shaft extension head 21L, and the axial length of the first rotor shaft extension head 21L is adapted to the inner hole depth of the first eccentric wheel 31'L, so the first rotor shaft extension head 21L is a short axis design, one end of the first connecting rod I 32'L (shown as the outer end) is fixedly connected to the first eccentric wheel 31'L (the two are designed as one body in this embodiment), and the other end of the first connecting rod I 32'L (shown as the inner end) is hinged to the first swing shaft arm 33L; a second connecting mechanism is provided between the second permanent magnet AC synchronous servo motor 2R and the second swing shaft 4R, the second connecting mechanism includes a second eccentric wheel 31'R, a second connecting rod I 32'L and a first swing shaft arm 33L. 32'R and the second swing arm 33R, the second swing arm 33R is fixed to the end of the second swing shaft 4R, the inner hole of the second eccentric wheel 31'R is directly fixed on the second rotor shaft extension head 21R, and the axial length of the second rotor shaft extension head 21R is adapted to the inner hole depth of the second eccentric wheel 31'R, so the second rotor shaft extension head 21R is also designed as a short axis, one end of the second connecting rod I 32'R (the outer end is shown in the figure) is fixedly connected to the second eccentric wheel 31'R (the two are designed as one body in this embodiment), and the other end of the second connecting rod I 32'R (the inner end is shown in the figure) is hinged to the second swing arm 33R.

[0029] The first permanent magnet AC synchronous servo motor and the second permanent magnet AC synchronous servo motor are universally interchangeable, which is beneficial to reducing the inventory of spare parts in the warehouse; the first and second permanent magnet AC synchronous servo motors are respectively built-in angle encoders, and the first rotor shaft and the second rotor shaft are respectively parallel to the first swing shaft and the second swing shaft.

[0030] Each eccentric wheel is directly and fixedly connected with the corresponding rotor shaft extension head, so that the input and output are coaxial; since the axial length of the rotor shaft extension head extending out of the motor housing is adapted to the inner hole depth of the eccentric wheel, the rotor shaft extension head is a short shaft head and its extension out of the motor housing is significantly shortened, and the rotor shaft section located in the motor housing can be supported by two bearings respectively mounted on the motor housing, thus avoiding the cantilever problem of the rotor shaft.

[0031] In order to reduce vibration, the first rotor shaft extension head 21L is also coaxially fixed with a first counterweight 311'L, and the axial length of this first rotor shaft extension head 21L is adapted to the sum of the inner hole depths of the first eccentric wheel 31'L and the first counterweight 311'L; the second rotor shaft extension head 21R is also coaxially fixed with a second counterweight 311'R, and the axial length of this second rotor shaft extension head 21R is adapted to the sum of the inner hole depths of the second eccentric wheel 31'R and the second counterweight 311'R.

[0032] Although the longitudinal front bottom beam 1F and the longitudinal rear bottom beam 1B have equal and thinner vertical wall thickness, the axial length of the rotor shaft extension head required for the rotor shaft extension head to pass through the aforementioned bottom beam vertical wall is extremely limited and can be ignored.

[0033] and Figure 2 Similarly, the first eccentric wheel 31'L, the first counterweight block 311'L and the first connecting rod 1 32'L can be disassembled and replaced. Figures 3 to 13 The first control crank 31L and the first connecting rod II 32L are shown so as to be connected between the first rotor shaft extension 21L and the first swing shaft arm 33L, and the second eccentric wheel 31'R, the second counterweight block 311'R and the second connecting rod I 32'R can be disassembled and replaced. Figures 3 to 13 The second control crank 31R and the second connecting rod II 32R are respectively connected between the second rotor shaft extension head 21R and the second swing shaft arm 33R. Fig. 9 The first rotor shaft extension 21L is shown to be located outside the housing of the first permanent magnet AC synchronous servo motor 2L, and the second rotor shaft extension 21R is located outside the housing of the second permanent magnet AC synchronous servo motor 2R.

[0034] In detail, the first control crank 31L includes a first control crank inner hole 31-1L and a first control crank shaft head 31-2L, the first control crank inner hole 31-1L is fastened to the first rotor shaft shaft extension head 21L by a fixing bolt K, and the axial length of the first rotor shaft shaft extension head 21L is adapted to the depth of the first control crank inner hole 31-1L, one end (outer end) of the first connecting rod II 32L is hinged to the first control crank shaft head 31-2L and the other end (inner end) thereof is hinged to the first swing shaft arm 33L; the second control crank 31R includes a second control crank inner hole 31-1R and a second control crank shaft head 31-2R, the second control crank inner hole 31-1R is fastened to the second rotor shaft shaft extension head 21R, and the axial length of the second rotor shaft shaft extension head 21R is adapted to the depth of the second control crank inner hole 31-1R, the second connecting rod II One end (outer end) of 32R is hinged to the second control crankshaft head 31-2R ​​and the other end (inner end) of 32R is hinged to the second swing shaft arm 33R.

[0035] The length of the first control crankshaft head is adapted to the articulated length of the first connecting rod, specifically, to the height of the articulated bearing (not shown) installed on the first connecting rod; the length of the second control crankshaft head is adapted to the articulated length of the second connecting rod, specifically, to the height of the articulated bearing (also not shown) installed on the second connecting rod; Figure 3 to Figure 6 The swing shaft arms shown are the same as those described above. Figure 1 , Figure 2 The swing axle arms shown in are universally interchangeable.

[0036] A first counterweight portion 31-3L is provided on the first control crank 31L at the end of the first control crank inner hole 31-1L opposite to the first control crank shaft head 31-2L; a second counterweight portion 31-3R is provided on the second control crank 31R at the end of the second control crank inner hole 31-1R opposite to the second control crank shaft head 31-2R. The first counterweight portion and the second counterweight portion have equal mass. When the first control crank and the second control crank are respectively fixed, the two counterweight portions are positioned facing each other.

[0037] The first counterweight 31-3L and the first control crank 31L are made into an integral structure, and the second counterweight 31-3R and the second control crank 31R are made into an integral structure. Compared with the counterweight and the control crank that are separated and coaxially fixed, the structure is simpler and the axial dimension is shorter. The first counterweight 31-3L and the second counterweight 31-3R are designed to be left-right symmetrical, respectively. Fig.11 The counterweight portions shown are respectively fan-shaped.

[0038] The housing of the first permanent magnet AC synchronous servo motor 2L is located on the inner side of the longitudinal front bottom beam 1F or on the inner side of the longitudinal rear bottom beam 1B ( Figures 1 to 5 The first connecting mechanism is arranged on the outside of the longitudinal front bottom beam 1F or on the outside of the longitudinal rear bottom beam 1B ( Figures 1 to 3 and Figure 5 The housing of the second permanent magnet AC synchronous servo motor 2R is located on the inner side of the longitudinal front bottom beam 1F or on the inner side of the longitudinal rear bottom beam 1B ( Figures 1 to 5 The second connecting mechanism is arranged on the outside of the longitudinal front bottom beam 1F or on the outside of the longitudinal rear bottom beam 1B ( Figures 1 to 3 and Figure 5 When the housings of the first and second permanent magnet AC synchronous servo motors are respectively located on the inner side of the longitudinal front bottom beam or the inner side of the longitudinal rear bottom beam, the housings of the two motors no longer protrude outside the corresponding bottom beams, which is conducive to packaging and transportation and saves storage space.

[0039] The transmission device of the jacquard machine directly driven by the permanent magnet AC synchronous servo motor in the above-mentioned embodiment is applied to the technical field of jacquard opening machinery, that is, according to another aspect of the present invention, a jacquard machine is provided, which is equipped with the transmission device of the jacquard machine directly driven by the permanent magnet AC synchronous servo motor.

Claims

1. A transmission device for a jacquard machine directly driven by a permanent magnet AC synchronous servo motor, comprising a permanent magnet AC synchronous servo motor, a first swing shaft and a second swing shaft, wherein the first swing shaft and the second swing shaft are parallel to each other and supported on a longitudinal front bottom beam and a longitudinal rear bottom beam respectively, and the first swing shaft and the second swing shaft extend between the longitudinal front bottom beam and the longitudinal rear bottom beam respectively, and characterized in that: The permanent magnet AC synchronous servo motor is divided into a first permanent magnet AC synchronous servo motor and a second permanent magnet AC synchronous servo motor, which are fixed to both ends of the longitudinal rear bottom beam, or fixed to both ends of the longitudinal front bottom beam, or one of the first permanent magnet AC synchronous servo motor and the second permanent magnet AC synchronous servo motor is fixed to one end of one of the longitudinal front bottom beam and the longitudinal rear bottom beam, and the other motor is fixed to the other end of the other bottom beam; A first connecting mechanism is arranged between the first permanent magnet AC synchronous servo motor and the first swing shaft, the first connecting mechanism includes a first eccentric wheel, a first connecting rod I and a first swing shaft arm, the first swing shaft arm is fixed at the end of the first swing shaft, the inner hole of the first eccentric wheel is directly fixed on the shaft extension head of the first rotor shaft, and the axial length of the shaft extension head of the first rotor shaft is adapted to the inner hole depth of the first eccentric wheel, one end of the first connecting rod I is fixedly connected to the first eccentric wheel and the other end thereof is hinged to the first swing shaft arm, a second connecting mechanism is arranged between the second permanent magnet AC synchronous servo motor and the second swing shaft, the second connecting mechanism includes a second eccentric wheel, a second connecting rod I and a second swing shaft arm, the second swing shaft arm is fixed at the end of the second swing shaft, the inner hole of the second eccentric wheel is directly fixed on the shaft extension head of the second rotor shaft, and the axial length of the shaft extension head of the second rotor shaft is adapted to the inner hole depth of the second eccentric wheel, one end of the second connecting rod I is fixedly connected to the second eccentric wheel and the other end thereof is hinged to the second swing shaft arm.

2. The transmission device of the jacquard machine directly driven by the permanent magnet AC synchronous servo motor according to claim 1, characterized in that: The first rotor shaft extension head is also coaxially fixed with a first counterweight, and the axial length of the first rotor shaft extension head is adapted to the inner hole depth of the first eccentric wheel and the inner hole depth of the first counterweight; the second rotor shaft extension head is also coaxially fixed with a second counterweight, and the axial length of the second rotor shaft extension head is adapted to the inner hole depth of the second eccentric wheel and the inner hole depth of the second counterweight.

3. The transmission device of the jacquard machine directly driven by the permanent magnet AC synchronous servo motor according to claim 2, characterized in that: The first eccentric wheel, the first counterweight block and the first connecting rod I and the second eccentric wheel, the second counterweight block and the second connecting rod I can be disassembled and replaced with the first control crank and the first connecting rod II and the second control crank and the second connecting rod II, and are correspondingly connected between the first rotor shaft extension head and the first swing shaft arm of the first permanent magnet AC synchronous servo motor, and correspondingly connected between the second rotor shaft extension head and the second swing shaft arm of the second permanent magnet AC synchronous servo motor, wherein, The first control crank includes a first control crank inner hole and a first control crank shaft head, the first control crank inner hole is fastened to the first rotor shaft shaft extension head, and the axial length of the first rotor shaft shaft extension head is adapted to the depth of the first control crank inner hole, and the first control crank shaft head is hinged to the first connecting rod II; the second control crank includes a second control crank inner hole and a second control crank shaft head, the second control crank inner hole is fastened to the second rotor shaft shaft extension head, and the axial length of the second rotor shaft shaft extension head is adapted to the depth of the second control crank inner hole, and the second control crank shaft head is hinged to the second connecting rod II.

4. The transmission device of the jacquard machine directly driven by the permanent magnet AC synchronous servo motor according to claim 3, characterized in that: A first counterweight is fixed on the first control crank at one end of the first control crank inner hole opposite to the first control crank shaft head; a second counterweight is fixed on the second control crank at one end of the second control crank inner hole opposite to the second control crank shaft head; the first counterweight and the second counterweight are positioned relative to each other.

5. The transmission device of the jacquard machine directly driven by the permanent magnet AC synchronous servo motor according to claim 4, characterized in that: The first counterweight is integrally formed with the first control crank and the second counterweight is integrally formed with the second control crank.

6. A jacquard machine comprising a transmission device equipped with a permanent magnet AC synchronous servo motor directly driving the jacquard machine according to any one of claims 1 to 5.

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