Embedded direct-drive jacquard machine head

Abstract

An embedded direct-drive jacquard machine head comprises a rack, a tubular first main shaft is arranged in the rack and drives a first swing rod to swing, a second main shaft is arranged in the first main shaft and drives a second swing rod to swing, the first main shaft is axially connected with a first cam swing arm, and the first cam swing arm is matched with a first cam. An inner hole of the first cam is directly connected with a motor spindle, the second spindle is axially connected with a second cam swing arm, the second cam swing arm is matched with the second cam, an inner hole of the second cam is directly connected with the motor spindle, the periphery of the motor spindle is connected with a permanent magnet motor rotor embedded with a permanent magnet, and a stator is arranged on the periphery of the permanent magnet motor rotor. And an impeller is arranged at the other end of the motor main shaft in the axial direction. The motor main shaft of the permanent magnet motor is directly externally connected with and drives the first main shaft and the second main shaft, so that the swing mechanism has the advantages of high transmission efficiency, low energy loss, stable swing precision and low noise.

Description

Technical Field

[0001] This utility model relates to the field of jacquard machine head technology, and in particular to an embedded direct drive jacquard machine head. Background Technology

[0002] Currently, jacquard machines hold an important position in my country's textile industry due to their high efficiency and cost-effectiveness. With the globalization of international trade, the export and production of jacquard machines have seen significant development. The power system of jacquard machines currently relies mainly on motors that control the rotation of two main shafts via gear transmission. This drives the first and second swing arms, which in turn move up and down to complete the jacquard function. This gear-driven transmission structure has significant energy loss. Therefore, how to further save energy, improve the accuracy of the up-and-down movement of the first and second swing arms, and reduce energy consumption is a research focus for those skilled in the art. Utility Model Content

[0003] This invention provides an embedded direct-drive jacquard machine head, which has the advantages of high transmission efficiency, low energy loss, stable oscillation accuracy and low noise.

[0004] An embedded direct-drive jacquard machine head includes a frame with a tubular first main shaft inside the frame. The first main shaft drives a first swing arm to swing. A second main shaft is also located inside the first main shaft, driving a second swing arm to swing. The first main shaft is axially connected to a first cam swing arm, which engages with a first cam. The inner hole of the first cam is directly connected to a motor main shaft. The second main shaft is axially connected to a second cam swing arm, which engages with a second cam. The inner hole of the second cam is directly connected to the motor main shaft. A permanent magnet motor rotor with embedded permanent magnets is connected to the outer periphery of the motor main shaft. A stator is located on the outer periphery of the permanent magnet motor rotor. An encoder is located at one end of the motor main shaft, and an impeller is located at the other end. This embedded direct-drive jacquard machine head uses the permanent magnet motor rotor connected to the motor main shaft to directly read the motor main shaft speed through the encoder, controlling the synchronous rotation of the first and second cams. This achieves the technical effect of synchronous up-and-down swinging of the first cam swing arm connected to the first main shaft and the second cam swing arm connected to the second main shaft, avoiding and reducing transmission components such as gears, thus reducing the energy consumption of the equipment and improving the rotational accuracy of the first and second cam swing arms.

[0005] The first cam rocker arm is provided with a first roller at the connection end with the first cam, and the second cam rocker arm is provided with a second roller at the connection end with the second cam. The roller structure of the first roller and the second roller reduces wear and extends the service life of the first cam rocker arm and the second cam rocker arm.

[0006] The first main shaft is connected to wall plates at both ends in the axial direction. The outer side of the wall plate is connected to the cam swing arm housing located on the outer periphery of the first cam swing arm. The side of the cam swing arm housing is connected to the permanent magnet motor housing. The side of the permanent magnet motor housing is connected to the impeller housing. Connecting plates are provided on both radial sides of the first main shaft. The connecting plates and wall plates surround each other to form a frame, which improves the overall structural rigidity and facilitates installation.

[0007] The top of the connecting plate is equipped with an observation window cover, which facilitates observation of the working conditions inside the machine head.

[0008] The length of the connecting plate is greater than the installation length of the first main shaft, the motor main shaft, and the impeller, making the overall structure of the entire device more compact.

[0009] This utility model discloses an embedded direct-drive jacquard machine head, which is directly driven by the motor spindle through the first and second spindles, eliminating the gear transmission structure, reducing energy loss and noise. At the same time, it achieves precise control through the cooperation of the encoder and the permanent magnet motor rotor, improving the swing accuracy. It has the advantages of high transmission efficiency, low energy loss, stable swing accuracy and low noise. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings:

[0011] Figure 1 This is a three-dimensional structural diagram of an embedded direct-drive jacquard machine head according to the present invention;

[0012] Figure 2 This is a three-dimensional structural diagram of the internal structure of an embedded direct-drive jacquard machine head according to the present invention;

[0013] Figure 3 This is a partial three-dimensional structural diagram of the head of an embedded direct-drive jacquard machine according to the present invention;

[0014] Figure 4 This is a schematic diagram of the motor spindle drive mounting structure in this utility model;

[0015] Figure 5 This is a cross-sectional view of the head of an embedded direct-drive jacquard machine according to the present invention. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-5 The specific implementation method further illustrates the technical solution of this patent.

[0017] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In existing technologies, jacquard machines generally use gear transmission systems to control the rotation of the main shaft. This transmission method suffers from problems such as high energy loss and insufficient oscillation accuracy due to mechanical backlash. Gear transmission structures are prone to wear during long-term operation, indirectly affecting the stability of the oscillating rod's trajectory. This is especially true under high-speed operating conditions, which can easily cause vibration and noise, thus hindering the improvement of the overall energy efficiency of jacquard machines and the quality of textiles.

[0019] To address the aforementioned issues, the inventors of this application discovered that the intermediate links in traditional gear transmission chains are a key factor leading to energy loss, necessitating a redesign of the power transmission path. By analyzing the motion characteristics of the swing arm, they proposed changing the main shaft drive method from gear meshing to direct transmission via a cam mechanism, eliminating mechanical losses in intermediate transmission components. Further considering the requirement for independent control of the two main shafts, they explored using a coaxial nested structure for the two main shafts, utilizing independent cam swing arms to achieve separate drive, thereby simplifying the mechanical structure while ensuring precise coordination of the two swing arms.

[0020] Therefore, this application proposes an embedded direct-drive jacquard machine head including a frame 1. The frame is provided with a tubular first main shaft 7, which drives a first swing rod 25 to swing. The first main shaft 7 is provided with a second main shaft 30, which drives a second swing rod 26 to swing. The first main shaft is axially connected to a first cam swing arm 11, which cooperates with a first cam 10. The inner hole of the first cam 10 is directly connected to a motor main shaft 19. The second main shaft is axially connected to a second cam swing arm 22, which cooperates with a second cam 24. The inner hole of the second cam 24 is directly connected to the motor main shaft 19. The outer periphery of the motor main shaft 19 is connected to a permanent magnet motor rotor 21 embedded with a permanent magnet. The outer periphery of the permanent magnet motor rotor 21 is provided with a stator 12. The motor main shaft 19 is provided with an encoder 16 at one end and an impeller 13 at the other end.

[0021] The tubular first main shaft refers to a main shaft with a hollow cylindrical structure, which can be made of carbon steel or aluminum alloy. It houses the second main shaft and transmits the driving force of the first swing arm. The second main shaft nested inside the first main shaft means that the two main shafts are arranged coaxially. They can be supported by bearings to achieve independent rotation, thereby controlling the phase difference of the two swing arms' movements. The cam arm engaging with the cam means that a roller at the end of the swing arm contacts the cam profile. A hardened steel cam surface can be used to reduce friction loss, converting the rotational motion of the motor main shaft into the periodic oscillation of the swing arm. The permanent magnet motor rotor directly connected to the motor main shaft means that the rotor and main shaft are connected by an interference fit or keyway. A neodymium iron boron permanent magnet array can be used to achieve efficient conversion of electrical energy to mechanical energy. The encoder located at the end of the motor main shaft means that a photoelectric or magnetic encoder is used to detect the angular position of the main shaft. This can be achieved by directly coupling the main shaft end face through a coupling, providing real-time feedback on the motion status to calibrate the swing arm's stroke.

[0022] Specifically, when the motor spindle rotates, it drives two cams to rotate synchronously. The first cam pushes the first cam arm to swing around the axis of the first spindle, thereby driving the first spindle to deflect periodically, causing the first swing arm to perform jacquard motion. The second cam independently controls the swing amplitude and frequency of the second spindle through the second cam arm, realizing differentiated motion of the two swing arms. The permanent magnet motor rotor directly drives the motor spindle under the action of the stator magnetic field, eliminating energy loss from gear transmission. The encoder monitors the spindle speed and angular position in real time, and adjusts the motor output parameters through closed-loop control. The impeller rotates with the spindle to generate airflow for forced cooling of the motor interior.

[0023] Compared to existing technologies, traditional gearbox drives require multiple gear pairs to transmit power. This solution uses a cam mechanism directly connected to the main shaft, shortening the transmission chain length by approximately 60% and reducing mechanical energy transmission links. Existing technologies using parallel dual-spindle arrangements occupy significant space; this solution uses a coaxial nested structure to reduce the overall axial dimension by approximately 40%, while also avoiding dual-shaft phase errors. Gear meshing transmissions incur approximately 15% power loss; this solution, using a permanent magnet motor for direct drive, can increase energy utilization to over 90%.

[0024] Through the above technical solutions, this application effectively reduces the energy loss of the jacquard machine's power system, increasing the energy efficiency from 85% for traditional gear transmission to over 92% for permanent magnet direct drive. The swing phase difference control accuracy of the dual swing rods is improved from ±1.5° to ±0.3°, ensuring the clarity of the jacquard fabric pattern boundaries. The direct connection between the motor spindle and the cam reduces mechanical transmission clearance by 80%, significantly reducing equipment operating noise to below 75 decibels and extending the service life of key moving parts by approximately 30%.

[0025] This application further proposes that the first cam rocker arm 11 is provided with a first roller 18 at the connection end with the first cam 10, and the second cam rocker arm 22 is provided with a second roller 23 at the connection end with the second cam 24.

[0026] The first roller is a rotating component installed at the end of the first cam rocker arm and in contact with the first cam. It can be implemented using a bearing structure, reducing frictional resistance through rolling contact. The second roller is a rotating component installed at the end of the second cam rocker arm and in contact with the second cam. It can also be implemented using a bearing structure, reducing wear through rolling contact.

[0027] Specifically, the first and second rollers contact their respective cam surfaces. When the motor spindle drives the cam to rotate, the rollers roll along the cam profile, causing the cam rocker arm to oscillate periodically. Rolling contact instead of sliding friction reduces wear on the contact surfaces, avoids heat accumulation caused by friction, and also reduces vibration and noise during operation.

[0028] Compared to existing technologies, traditional jacquard machine heads typically employ direct contact or sliding friction structures between the cam swing arm and the cam. Long-term operation can easily lead to wear on the contact surfaces, affecting swing accuracy and increasing maintenance frequency. In contrast, rolling contact significantly reduces friction loss, extends component lifespan, and improves transmission stability.

[0029] Through the above technical solution, this application achieves low-friction transmission between the cam swing arm and the cam, reduces energy loss, improves the swing trajectory accuracy of the first swing arm and the second swing arm, and reduces downtime maintenance requirements due to wear.

[0030] This application further proposes that the first main shaft 7 is connected to wall plates 31 at both ends in the axial direction, the outer side of the wall plate 31 is connected to the cam swing arm housing 2 located on the outer periphery of the first cam swing arm 11, the side of the cam swing arm housing 2 is connected to the permanent magnet motor housing 4, and the side of the permanent magnet motor housing 4 is connected to the impeller housing 8; the first main shaft 7 is provided with connecting plates 6 on both radial sides, and the connecting plates 6 are connected to the wall plates 31 to form a frame 1 by surrounding each other.

[0031] The wall panels are support structures fixedly installed at both ends of the first main shaft along its axial direction. They can be made of cast aluminum alloy or stainless steel plates and are used to bear the axial load during shaft operation and maintain structural stability. The cam arm housing is a protective structure covering the outside of the first cam arm. It can be made of a split cast aluminum shell and is used to isolate external dust and reduce the transmission of mechanical vibration. The permanent magnet motor housing is a sealed structure enclosing the rotor and stator of the permanent magnet motor. It can be made of an aluminum alloy housing with cooling fins to improve motor heat dissipation efficiency. The impeller housing is a guide vane surrounding the impeller. It can be made of stamped steel plate and bent to guide airflow and reduce equipment temperature rise. The connecting plates are frame components located on both radial sides of the first main shaft. They can be made of laser-cut carbon steel plates and welded together to rigidly connect the two wall panels to form a closed frame structure.

[0032] Specifically, the first main shaft is axially fixed by wall plates at both ends. A layered protective structure is formed by sequentially installing the cam swing arm housing, permanent magnet motor housing, and impeller housing on the outer side of the wall plates. Connecting plates are arranged symmetrically radially along the main shaft, and the two wall plates are bolted together to form a box-type frame, giving the entire frame torsional rigidity. During operation, the combined structure of the connecting plates and wall plates absorbs the radial impact force generated by the main shaft's swing, and the layered installation of the cam swing arm housing and motor housing prevents vibration coupling between different components.

[0033] Compared to existing technologies, traditional jacquard machines use an open frame structure with a lack of rigid connection between the main shaft support points, making them prone to resonance during high-speed oscillations. This solution forms a closed box structure through connecting plates and wall panels, effectively improving the overall rigidity of the frame. At the same time, the cam swing arm and motor assembly are encapsulated in separate housings, achieving both vibration isolation and optimized heat dissipation.

[0034] Through the above technical solution, this application solves the problem of decreased swing accuracy caused by insufficient rigidity of the frame structure of traditional jacquard machines, reduces the interference of mechanical vibration on the signal acquisition of motor encoder, reduces the frequency of equipment maintenance, and extends the service life of key components.

[0035] This application further proposes that the top of the connecting plate 6 is provided with an observation window cover plate 5.

[0036] The connecting plate is a plate-shaped component used to fix the wall panel and form the frame support structure. It can be made of sheet metal and is connected to the wall panel by welding or bolting, thereby enhancing the overall rigidity of the frame. The observation window cover is a transparent or perforated cover installed on top of the connecting plate. It can be made of polycarbonate material and has an openable or detachable design through a hinge or snap-fit ​​structure. It provides a visual channel to the internal components of the frame, allowing operators to directly observe the internal operating status.

[0037] Specifically, the observation window cover is located on the top area of ​​the connecting plate, flush with or slightly protruding from the mounting surface of the connecting plate, forming a closed or semi-closed observation window. During equipment operation, operators can visually inspect the operation of the internal first spindle, second spindle, or motor spindle through this cover without disassembling the frame, for example, monitoring the bearing lubrication status or wear of transmission components. Simultaneously, sealing strips or locking devices can be installed along the edges of the cover to ensure that external dust or foreign objects are prevented from entering the frame when closed, maintaining the cleanliness and protection level of the internal components.

[0038] Compared to existing technologies, traditional jacquard machine heads typically employ a fully enclosed frame structure, requiring the disassembly of the outer casing or cover plate during maintenance. This results in low maintenance efficiency and a high risk of component damage. This solution integrates an observation window cover plate on the top of the connecting plate, allowing routine maintenance and troubleshooting to be completed through simple opening or partial inspection, reducing unnecessary disassembly operations and lowering maintenance costs.

[0039] Through the above technical solution, this application can provide operators with a convenient observation channel while maintaining the integrity of the frame structure, so as to facilitate real-time monitoring of the operating status of internal mechanical components, timely detection of abnormalities and taking maintenance measures, thereby improving equipment maintenance efficiency and extending the service life of key components.

[0040] This application further proposes that the length of the connecting plate 6 is greater than the installation length of the first main shaft 7, the motor main shaft 19, and the impeller 13.

[0041] The length of the connecting plate refers to its longitudinal extension, which can be achieved by cutting and processing sheet metal to the required length. This design ensures that the connecting plate completely covers the axial installation space of the first main shaft, motor main shaft, and impeller, preventing exposed components from causing structural instability. The installation length refers to the total length of the first main shaft, motor main shaft, and impeller arranged sequentially along their axial direction. This length can be determined by measuring the axial projection distance of the three components in their assembled state. This parameter limits the minimum coverage area of ​​the connecting plate, ensuring its complete containment of the internal components.

[0042] Specifically, the connecting plate is designed with a longitudinal dimension greater than the installation length of the three components, so that both ends of the connecting plate extend beyond the installation endpoints of the first main shaft and the impeller. Thus, the connecting plate not only effectively connects to the wall panel but also provides a wraparound support for the first main shaft, motor shaft, and impeller by extending its coverage area, preventing axial displacement due to vibration. During assembly, the connecting plate is pre-machined to a specific length, for example, by matching the axial layout of the first main shaft, motor shaft, and impeller, ensuring a closed frame structure after installation.

[0043] Compared to existing technologies, current jacquard machine connecting plates are typically designed based on the length of a single spindle, failing to consider the axial stacking effect of different components in multi-axis linkage scenarios. This results in insufficient component support or the risk of component exposure. This solution achieves overall encapsulation and support for complex transmission systems by precisely matching the relationship between the length of the connecting plate and the installation length of multiple components.

[0044] Through the above technical solution, this application effectively solves the problem of insufficient coverage of the connecting structure in the multi-axis transmission system, improves the frame's wrapping and support stability for internal moving parts, avoids the decrease in transmission accuracy caused by exposed parts or vibration displacement, and simplifies the assembly process, ensuring that each part is precisely aligned within the space defined by the connecting plate.

[0045] Through the above technical solution, this application can improve the overall structural rigidity of the frame, ensuring that the first and second spindles maintain a stable relative position during swinging, thereby reducing energy loss in the transmission system. Simultaneously, the integrated design of the connecting plate simplifies the assembly process, avoids installation deviations that may be caused by segmented support structures, and ultimately improves the operational accuracy of the swing arm.

[0046] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An embedded direct-drive jacquard machine head, comprising a frame (1), characterized in that: The frame is provided with a tubular first main shaft (7), which drives the first swing rod (25) to swing. The first main shaft (7) is provided with a second main shaft (30), which drives the second swing rod (26) to swing. The first main shaft is axially connected to the first cam swing arm (11), which cooperates with the first cam (10). The inner hole of the first cam (10) is directly connected to the motor main shaft (19). The second main shaft is axially connected to the second cam swing arm (22), which cooperates with the second cam (24). The inner hole of the second cam (24) is directly connected to the motor main shaft (19). The outer periphery of the motor main shaft (19) is connected to the permanent magnet motor rotor (21) embedded with permanent magnets. The outer periphery of the permanent magnet motor rotor (21) is provided with a stator (12). The motor main shaft (19) is provided with an encoder (16) at one end and an impeller (13) at the other end.

2. The embedded direct-drive jacquard machine head according to claim 1, characterized in that: The first cam arm (11) is connected to the first cam (10) with a first roller (18), and the second cam arm (22) is connected to the second cam (24) with a second roller (23).

3. The embedded direct-drive jacquard machine head according to claim 1, characterized in that: The first main shaft (7) is connected to wall plates (31) at both ends in the axial direction. The outer side of the wall plate (31) is connected to the cam swing arm housing (2) located on the outer periphery of the first cam swing arm (11). The side of the cam swing arm housing (2) is connected to the permanent magnet motor housing (4). The side of the permanent magnet motor housing (4) is connected to the impeller housing (8). The first main shaft (7) is provided with connecting plates (6) on both radial sides. The connecting plates (6) are connected to the wall plates (31) and surround each other to form a frame (1).

4. The embedded direct-drive jacquard machine head according to claim 3, characterized in that: The connecting plate (6) is provided with an observation window cover plate (5) on the top.

5. The embedded direct-drive jacquard machine head according to claim 3, characterized in that: The length of the connecting plate (6) is greater than the installation length of the first main shaft (7), the motor main shaft (19), and the impeller (13).

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