Power transmission device for direct-drive cam-type jacquard loom with spindle motor

Abstract

This utility model discloses a power transmission device for a direct-drive cam-driven jacquard loom machine with a main spindle motor. The device includes a main spindle motor, a common input / output shaft, conjugate cams, driven swing arms, and swing shafts. The frame has a crossbeam and cam box-type wall plates fixed to both sides of the crossbeam. The cam box-type wall plates house the common input / output shaft and conjugate cams respectively mounted on the corresponding common input / output shaft. Each of the two cam box-type wall plates has a drive side wall plate, a cam box body, and a box cover. The inner ends of the two common input / output shafts are supported on the corresponding drive side wall plates, while the outer ends are supported on the corresponding box covers. One of the two driven swing arms is fixed to one end of a swing shaft, and the other is fixed to the opposite end of the other swing shaft. The double rollers of the two driven swing arms cooperate with the corresponding conjugate cams. The two box covers respectively fix the main spindle motor. The shaft ends of the two common input / output shafts extending from the corresponding box covers are respectively fixed in the shaft holes of the corresponding main spindle motors. Using this design results in good dynamic balance, uniform vibration distribution, and reduced swing shaft cantilever.

Description

Technical Field

[0001] This utility model belongs to the technical field of cam-opening jacquard machines, specifically relating to a power transmission device for a cam-opening jacquard machine with a main shaft motor directly driven. Background Technology

[0002] CN1185496A discloses a shed forming device, its installation process, and a Jakarta-type loom equipped with the device. A single, continuously rotating input shaft is fitted with two pairs of conjugate cams. Each pair of cams consists of two eccentric discs. This single input shaft is positioned on one or the other side of the shed forming device. A second shaft, coaxially connected to the input shaft via a coupling, is driven by the loom's shaft for continuous rotation. It is known in the industry that this shed forming device is powered by the loom's main motor, and the location of the input shaft on either side of the shed forming device is entirely determined by whether it is a right-hand or left-hand loom. Because the single input shaft is coaxially fitted with two pairs of conjugate cams, and an axial gap is required between the outer and inner conjugate cams, the concentric inner swing shaft extends further beyond the wall plate than the outer swing shaft tube, resulting in a significant cantilever state. This allows the double-roller driven swing frame mounted on the concentric inner swing shaft to engage with the outer conjugate cam. For example, CN117845398A provides a power transmission and reduction device for a servo motor direct-drive jacquard machine, showing a servo motor, a cam box and a camshaft. The left side of the cam box is fixed to the middle of the right side of the right wall panel of the jacquard machine. The left end of the camshaft is rotatably supported on the right wall panel of the jacquard machine through a left camshaft support bearing. The middle part of the camshaft is located in the cam box cavity of the cam box. Four cams (i.e., two pairs of conjugate cams) are fixed in the middle of the camshaft. The middle part of the camshaft is rotatably supported on a cam box cover fixed to the right side of the cam box cavity for protecting the right side opening of the cam box cavity through a camshaft middle support bearing. This device also includes a gearbox fixed to the right side of the aforementioned cam box cover. The aforementioned servo motor is horizontally fixed to the upper right side of the gearbox. The motor shaft of the servo motor extends to the left into the gearbox cavity and connects to a motor shaft gear. The right end of the aforementioned camshaft extends into the aforementioned gearbox and is rotatably supported on the lower part of the gearbox via a right camshaft support bearing. A camshaft reduction gear, meshing with the motor shaft gear, is fixed at the right end of the camshaft at a position corresponding to the aforementioned motor shaft gear. Therefore, this device consists of only one servo motor and one motor shaft gear, one cam box, one camshaft, and one camshaft reduction gear. The entire drive and reduction transmission chain is located on the side where the jacquard machine's right wall panel is located. Since the motor shaft gear and camshaft reduction gear are subject to significant impact loads, they are prone to wear. The impact loads are even more pronounced during alternating heavy and variable load operation. Furthermore, the right end of the inner swing shaft also suffers from a cantilever problem, similar to the aforementioned issue, thus requiring improvement. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art by providing a power transmission device for a spindle motor direct-drive cam-type jacquard loom.

[0004] Therefore, the present invention provides the following technical solution:

[0005] The power transmission device of the direct-drive cam-type jacquard loom machine includes a main spindle motor, a camshaft, a conjugate cam, a driven swing frame, and a swing shaft. The camshaft is a common input / output shaft. The improvement lies in that the machine frame consists of a crossbeam and cam box-type wall plates fixed to both sides of the crossbeam. Each cam box-type wall plate is equipped with a common input / output shaft and a conjugate cam respectively mounted on its corresponding common input / output shaft. Each of the two cam box-type wall plates has a drive side wall plate and a cam box body fixed to the outer wall of the corresponding drive side wall plate. The two output and input common shafts are respectively fixed to the outer ends of the corresponding cam box bodies. The inner ends of each shaft are supported on the corresponding drive side wall plate and the outer ends are supported on the corresponding box body. One of the two driven swing arms is fixed to one end of a swing shaft and the other driven swing arm is fixed to the opposite end of the other swing shaft. The double rollers of the two driven swing arms cooperate with the corresponding conjugate cams. The box bodies of the two cam box walls are respectively fixed with main shaft motors. The shaft ends of the two output and input common shafts extending out of the corresponding box bodies are respectively fixed in the shaft holes of the corresponding main shaft motors.

[0006] The two main spindle motors mentioned above each include a permanent magnet outer rotor and a stator, and the two common shafts for output and input are respectively fixed in the shaft holes of the corresponding permanent magnet outer rotors.

[0007] The aforementioned pendulum axis is an outer pendulum axis, and the other pendulum axis is an inner pendulum axis, which is coaxially located within the outer pendulum axis. One of the two driven pendulum frames is fixed to one end of the outer pendulum axis, while the other is fixed to the opposite end of the inner pendulum axis.

[0008] Of the two pendulum axes mentioned above, one is located parallel to the other above it, and one of the two driven pendulum frames is fixed to one end of the upper pendulum axis while the other of the two driven pendulum frames is fixed to the opposite end of the lower pendulum axis.

[0009] The opposing extensions of the rotation axes of the two common input and output axes mentioned above form collinear lines. The cam box-type wall panels fixed on both sides of the crossbeam, except for the box cover, are integrally formed and interchangeable. By adding a structure on the other side of the crossbeam that combines the cam box body and the drive side wall panel into one piece, the overall strength and vibration resistance are enhanced. This overcomes the shortcomings of existing cam-type jacquard machine frames on the domestic and international markets, where the drive side wall panel is generally a separate wall panel, resulting in weak strength and vibration resistance. Indeed, this is an unexpected effect brought about by dual-side drive and dual-side transmission. The two integrally formed cam box-type wall panels achieve versatility, saving mold opening costs and thus significantly reducing manufacturing costs.

[0010] Compared with the prior art, the present invention has the following advantages and positive effects:

[0011] After abandoning the existing single-sided centralized structure, this power transmission device is improved to have a distributed layout of the main shaft motor and cam box transmission chain on both sides, which has good dynamic balance, uniform vibration distribution on both sides of the jacquard machine body, and can effectively reduce the cantilever defect of the swing shaft.

[0012] The driving force provided by the main shaft motors configured on both sides is balanced. Combined with the common shaft configuration of the output and input on both sides, the double-end support of each shaft, and the fact that each shaft is equipped with only one conjugate cam, compared with the existing single-sided cam main shaft configuration, the double-end support of the shaft, and the coaxial configuration of two sets of conjugate cams, the load on the bearings supported by the common shaft of the output and input on both sides can be greatly reduced. In particular, the transmission load distribution is balanced. This device meets the requirements of heavy load, especially variable load, of large jacquard opening and is highly targeted at working conditions with large changes in warp yarn starting. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention mounted on a cam-opening jacquard machine;

[0014] Figure 2 It is to be dismantled Figure 1 The front view of the cam housing and the rear of the housing cover;

[0015] Figure 3 yes Figure 2 Top view;

[0016] Figure 4 This is a 3D view after removing the right-side cam housing and cover;

[0017] Figure 5 This is a 3D view after removing the left side of the cam box and the box cover;

[0018] Figure 6 yes Figure 2 The right view, and the spindle motor has been removed;

[0019] Figure 7 It is a 3D view of the coaxially configured swing arm assembly;

[0020] Figure 8 yes Figure 7 Exploded view;

[0021] Figure 9 It is an exploded view of the spindle motor, the common shaft for output and input, and the conjugate cam.

[0022] Figure 10 This is an exploded view of the spindle motor, the common shaft for output and input, and the conjugate cam from another perspective. Detailed Implementation

[0023] Please see Figures 1-10 As shown, this utility model provides a power transmission device for a direct-drive cam-driven jacquard loom machine with a main shaft motor, including a main shaft motor 1, a camshaft, a conjugate cam 3, driven swing arms 4L and 4R, and swing shafts 51 and 52. The camshaft is a common input / output shaft 2. The improvement lies in that the frame of the jacquard machine is composed of two crossbeams 6 that are spaced apart and fixed to the gantry frame of the jacquard machine, and cam box-type wall plates 7 fixed on both sides of the crossbeams. The cam box-type wall plates are respectively equipped with the common input / output shaft 2 and a conjugate cam 3 respectively disposed on the corresponding common input / output shaft. The wheel box type wall panel 7 has a drive side wall panel 71, a cam box 70 fixed to the outer wall of the corresponding drive side wall panel, and a box cover 72 fixed to the outer end of the corresponding cam box. The inner ends of the two common input / output shafts 2 are supported on the corresponding drive side wall panel, and the outer ends of the two common input / output shafts 2 are supported on the corresponding box cover. One of the two driven swing arms 4L and 4R is fixed to one end of a swing shaft, while the other driven swing arm is fixed to the opposite end of the other swing shaft. The double rollers 40L and 40R of the two driven swing arms 4L and 4R cooperate with the corresponding conjugate cams (in...). Figure 2 The double rollers (only the front one is visible) are a method to eliminate the cantilever defect of the swing shaft, as shown in the figure. One swing shaft 51 is the outer swing shaft, and the other swing shaft 52 is the inner swing shaft and is coaxially located in the outer swing shaft. One of the two driven swing arms, namely the driven swing arm 4R, is fixed to one end of the outer swing shaft (the right end is shown in the figure), and the other driven swing arm 4L is fixed to the opposite end of the inner swing shaft 52 (the left end is shown in the figure). The lower part of the box cover 72 of the two cam box wall panels 7 is respectively fixed with the main shaft motor 1. The two common shafts 2 of the output and input extend out of the corresponding box cover and are respectively fixed in the shaft hole of the corresponding main shaft motor 1.

[0024] Please see Figure 9 , 10 The two main shaft motors 1 each include a permanent magnet outer rotor 11 and a stator 12. The windings of the stator 12 are sealed with glue and are therefore not visible. The two common input and output shafts 2 are stepped shafts, each including a tapered shaft section 21 and a threaded shaft section 22. The two tapered shaft sections 21 are fixed to the shaft holes 110 of the corresponding permanent magnet outer rotors 11 and then tightened with nuts 23. Since the speed ratio between the loom and the compound jacquard loom is 2:1 (this cam-opening jacquard loom is a compound jacquard loom), it is reasonable for the loom to use an inner rotor permanent magnet motor for the main shaft motor. After the optimization of the permanent magnet outer rotor structure in this utility model, the rotational inertia can be effectively reduced, thereby improving the operational stability. In addition, except for winding burnout, all other faults can be repaired and eliminated on-site.

[0025] Another method to eliminate the cantilever defect of the pendulum axis is to have one of the two pendulum axes positioned parallel above the other, with one of the two driven pendulum arms fixed to one end of the upper pendulum axis and the other of the two driven pendulum arms fixed to the opposite end of the lower pendulum axis (not shown).

[0026] See Figure 3 The opposing extensions of the rotation axes of the two common input / output axes 2 form a collinear line X2. The cam box-type wall panels 7, fixed to both sides of the crossbeam 6, are integrally formed except for the box cover 72 and are interchangeable. Figure 1 .

[0027] The main spindle motor 1, the common shaft for output and input 2, and the conjugate cam 3 are all the same and interchangeable.

[0028] Under the continuous rotation of the two common input and output shafts 2, the two conjugate cams 3 each drive the coaxially arranged inner swing shaft 52 and outer swing shaft tube 51 to swing synchronously in opposite directions through a driven swing frame (a known component) equipped with double rollers, or drive the separate and parallel swing shafts to swing synchronously in opposite directions. For the coaxially arranged central swing shaft and the rocker arm mounted on it, and the concentric swing shaft tube and the rocker arm mounted on it, please refer to the jacquard opening device equipped with a knife-lifting guide mechanism (CN205205371U) applied for by the inventor on October 18, 2015. The knife-lifting mechanism, knife-lifting guide mechanism, and vertical connecting rod for lifting, etc., use the technology of that patent and will not be described again here. However, the aforementioned straight line X2 is parallel to the swing axis X52 of the inner swing shaft 52 and the swing axis X51 of the outer swing shaft tube 51, respectively. Figure 8 As shown.

[0029] This technical solution is applicable to cam jacquard looms where the rotation axis of the two input and output common axes, the swing axis of the coaxially arranged swing axis, or the swing axis of the parallel arranged split swing axes are all aligned with the weft direction of the loom.

Claims

1. A power transmission device for a direct-drive cam-driven jacquard loom with a main spindle motor, comprising a main spindle motor, a camshaft, a conjugate cam, a driven swing arm, and a swing shaft, wherein the camshaft is a common shaft for both input and output, characterized in that, The frame of the jacquard machine consists of a crossbeam and cam box-type wall panels fixed on both sides of the crossbeam. Each cam box-type wall panel is equipped with an input / output common shaft and a conjugate cam respectively mounted on its respective input / output common shaft. Each of the two cam box-type wall panels has a drive side wall panel, a cam box body fixed to the outer wall of the corresponding drive side wall panel, and a box cover fixed to the outer end of the corresponding cam box body. The inner end of each of the two common shafts for output and input is supported on the corresponding drive side wall panel, and the outer end of each shaft is supported on the corresponding box cover. One of the two driven pendulum frames is fixed to one end of a pendulum shaft, while the other driven pendulum frame is fixed to the opposite end of the other pendulum shaft. The double rollers of the two driven pendulum frames cooperate with corresponding conjugate cams. The covers of the two cam box-type wall panels are respectively fixed with main spindle motors, and the shaft ends of the two common input and output shafts extend out of the corresponding covers and are respectively fixed in the shaft holes of the corresponding main spindle motors.

2. The power transmission device for a direct-drive cam-driven jacquard loom machine according to claim 1, characterized in that, The two main spindle motors each include a permanent magnet outer rotor and a stator, and the two common shafts for output and input are respectively fixed in the shaft holes of the corresponding permanent magnet outer rotors.

3. The power transmission device for a direct-drive cam-driven jacquard loom machine according to claim 1, characterized in that, One pendulum axis is an outer pendulum axis, and the other pendulum axis is an inner pendulum axis and is coaxially located in the outer pendulum axis. One of the two driven pendulum frames is fixed to one end of the outer pendulum axis and the other is fixed to the opposite end of the inner pendulum axis.

4. The power transmission device of the spindle motor direct drive cam opening jacquard machine according to claim 1, characterized in that... Of the two pendulum axes, one is parallel and located above the other. One of the two driven pendulum frames is fixed to one end of the upper pendulum axis, while the other of the two driven pendulum frames is fixed to the opposite end of the lower pendulum axis.

5. The power transmission device for a direct-drive cam-driven jacquard loom machine according to claim 1, characterized in that, The opposing extensions of the rotation axes of the two common input and output axes form a common straight line. The cam box wall panels fixed on both sides of the crossbeam, except for the box cover, are integrally formed and interchangeable.

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