An externally motor-controlled weft take-up and weft insertion device and method

Abstract

This invention discloses an externally motor-controlled weft take-up and unwrap device and a weft insertion method. The weft insertion drive module has a weft tube control module mounted on its module motion slider. A shuttle rest is fixed to the end of the weft insertion drive module, allowing the shuttle body to be positioned on the shuttle rest. The transmission mounting base of the weft tube control module is equipped with a weft insertion support rapier and a rotatable lightweight weft tube drive shaft. The lightweight drive shaft is driven by the weft tube control motor and rotates. The shuttle body includes a shuttle body with two sets of rapier support blocks at the rear and two sets of drive blocks rotatably mounted at the front. A weft tube is detachably mounted between the two sets of drive blocks. The weft insertion support rapier can engage with the rapier support blocks on the shuttle body and drive the shuttle body forward under the influence of the weft insertion drive module. The lightweight drive shaft can engage with the drive blocks and drive the weft tube to rotate under the influence of the weft tube control motor, thus controlling the unwinding of the weft tube.

Description

Technical Field

[0001] This invention relates to the field of textile machinery technology, and in particular to an externally motor-controlled weft take-up and take-up device and a weft insertion method. Background Technology

[0002] Traditional shuttle looms require a shuttle storing yarn to perform reciprocating weft insertion during closed-loop weft weaving. During insertion, the yarn stored in the shuttle is pulled out and enters the shed by external traction. However, the amount of yarn released from the weft tube during this process is often passively pulled out. This process lacks a weft tube rewinding action, making weft tension difficult to control. For special fabrics, if a certain amount of weft yarn release is required for a particular insertion, this method cannot be met. While the active weft tube unwinding method proposed in patent CN112030323A is feasible, it places the weft tube unwinding control motor inside the shuttle, leading to inconvenient motor power supply, requiring frequent charging or battery replacements. Furthermore, the integration of multiple modules into the shuttle body results in an excessively large shuttle body, reducing the relative weft yarn storage capacity and decreasing the adaptability of the fabric. Summary of the Invention

[0003] The purpose of this invention is to provide an externally motor-controlled weft take-up and release tube device and a weft insertion method. It moves the drive control part of the weft take-up and release tube to the outside of the shuttle body, which solves the problems of excessive shuttle body size and inconvenient power supply for motors inside the shuttle body. At the same time, the selection of motors and control methods of the external drive control part can be further expanded. This invention greatly expands the weft insertion stroke of the shuttle body and increases the fabric weaving width.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0005] An externally motor-controlled weft take-up and take-up device includes two sets of weft insertion modules and a shuttle body arranged opposite to each other. The weft insertion module includes a weft insertion drive module, a weft tube control module mounted on the module motion slider of the weft insertion drive module, and a shuttle rest fixed to the end of the weft insertion drive module. The shuttle body can be positioned on the shuttle rest. The weft tube control module includes a transmission mounting base, a weft insertion support rapier mounted at the rear of the transmission mounting base, and a lightweight weft tube drive shaft rotatably mounted on the transmission mounting base. The lightweight weft tube drive shaft is driven by a weft tube control motor and rotates. The shuttle body includes a shuttle body, with two sets of rapier support blocks mounted on the rear two sides of the shuttle body, and two sets of transmission blocks rotatably mounted on the front two sides of the shuttle body. A weft tube is detachably mounted between the two sets of transmission blocks.

[0006] The weft insertion support rapier can be engaged in the rapier support block on the shuttle body and drive the shuttle body forward under the drive of the weft insertion drive module;

[0007] The lightweight drive shaft of the weft tube can be snapped onto the drive block and, driven by the weft tube control motor, drives the weft tube to rotate, thereby achieving the unwinding control of the weft tube.

[0008] Two sets of weft insertion modules are arranged opposite to each other and are respectively mounted on the lifting slider of the lifting module. The two sets of lifting modules drive the lifting slider to move and simultaneously drive the two sets of weft insertion modules to move up and down, so that the weaving opening formed between the two sets of weft insertion modules can move up and down, and the weft insertion height can move with the up and down movement of the warp opening position.

[0009] Preferably, the weft insertion module comprises a left weft insertion module and a right weft insertion module, which have the same structure. The left weft insertion module includes a left weft insertion drive module, a left weft tube control module mounted on the left module motion slider of the left weft insertion drive module, and a left shuttle rest fixed at the end of the left weft insertion drive module. The right weft insertion module includes a right weft insertion drive module, a right weft tube control module mounted on the right module motion slider of the right weft insertion drive module, and a right shuttle rest fixed at the end of the right weft insertion drive module. The left or right weft insertion drive module drives the module motion slider on the gear rack structure, synchronous belt module, or lead screw module to move under the drive of the drive element, thereby realizing the reciprocating motion of the weft tube control module on the module motion slider.

[0010] Preferably, the shuttle body can be positioned on the shuttle rest by a shuttle locking pin, and the shuttle body is provided with a shuttle stop slot, into which the shuttle locking pin can be inserted to position the shuttle body on the shuttle rest.

[0011] Preferably, the rapier support block is provided with a guide groove, so that the weft insertion rapier can be inserted into the guide groove on the rapier support block for locking and positioning.

[0012] Preferably, the weft tube control motor is a rotary motor, which is connected to the lightweight weft tube drive shaft via a coupling. The front end of the lightweight weft tube drive shaft is provided with a flat boss, and the rear part of the transmission block is provided with a groove that fits into the flat boss. After the lightweight weft tube drive shaft is inserted into the transmission block and connected, the weft tube rotates under the drive of the weft tube control motor.

[0013] Preferably, the front end of the transmission block is provided with a boss, and both ends of the weft tube are respectively provided with grooves that cooperate with the boss. The grooves of the weft tube can be fitted with the boss of the transmission block so that the weft tube can be detachably installed between the two sets of transmission blocks.

[0014] Preferably, the transmission block is rotatably mounted on the shuttle body via a bearing, and a retaining spring is snapped into the shuttle body. A spring is connected between the retaining spring and the bearing. When the weft tube is pressed to one side, the spring is compressed, causing the boss on the other side of the weft tube to disengage from the boss of the transmission block, and the weft tube can then be removed.

[0015] The front side of the shuttle body is equipped with a yarn guide block, and the yarn guide block is provided with a yarn outlet. The weft yarn tube exits through the yarn outlet located at the front end of the shuttle body to avoid the yarn from rubbing against the shuttle body. A tension sensor is provided at the yarn outlet to detect the tension of the yarn.

[0016] Preferably, the weft insertion drive module drives the weft tube control module to move. The weft tube control module can drive the weft insertion support rapier and the lightweight weft tube drive shaft to move synchronously in the left and right directions. Each shuttle rest is provided with a rapier guide block and a drive shaft guide block. The weft insertion support rapier is guided by the rapier guide block, and the lightweight weft tube drive shaft is guided by the drive shaft guide block, ensuring the straightness of the weft insertion support rapier and the lightweight weft tube drive shaft during the movement.

[0017] A weft insertion method using an externally motor-controlled weft take-up and release device, characterized by the following steps:

[0018] (1) After the left weft insertion support rapier is inserted into the guide groove on the rapier support block and clamps and positions the shuttle body under the drive of the left weft insertion module, the left shuttle lock pin is lifted, and then the left weft insertion module moves the shuttle body forward from the left shuttle feeding start position to the right shuttle resting seat. After the right shuttle lock pin is lowered, the shuttle body is positioned on the right shuttle resting seat, and the left weft insertion module drives the left weft insertion support rapier to reset to the left shuttle feeding start position.

[0019] (2) During the weft insertion process, the unwinding of the weft tube is driven by the left weft tube control motor of the left weft tube control module to rotate the left weft tube lightweight transmission shaft. The transmission block drives the weft tube to rotate synchronously, and the torque of the weft tube is fed back to the left weft tube control motor through the left weft tube lightweight transmission shaft. By utilizing the variation law of the weft tube winding diameter and the constant torque mode of the left weft tube control motor, stable tension control of the weft yarn can be achieved. If a reserved length of weft yarn is required during the weaving process, a fixed length of weft unwinding action can be achieved.

[0020] (3) When the next shuttle begins, the right weft insertion support rapier is inserted into the guide groove on the rapier support block and locked in place by the right weft insertion module. Then the right shuttle lock pin is lifted. The right weft insertion module moves the shuttle body forward from the right shuttle feeding start position to the left shuttle resting seat. The left shuttle lock pin is lowered to position the shuttle body on the left shuttle resting seat. The right weft insertion module drives the right weft insertion support rapier to reset to the right shuttle feeding start position. The reciprocating weft insertion action is achieved in this way.

[0021] (4) During the weft insertion process, the unwinding of the weft tube is driven by the right weft tube control motor of the right weft tube control module to rotate the right weft tube lightweight transmission shaft. The transmission block drives the weft tube to rotate synchronously, and the torque of the weft tube is fed back to the right weft tube control motor through the right weft tube lightweight transmission shaft. By utilizing the variation law of the weft tube winding diameter and the constant torque mode of the right weft tube control motor, stable tension control of the weft yarn can be achieved. If a reserved length of weft yarn is required during the weaving process, the weft unwinding action of a fixed length can be achieved.

[0022] The beneficial effects of this invention are:

[0023] This invention moves the drive control part of the weft take-up and take-up tubes to the outside of the shuttle body, solving the problems of excessive shuttle body size and inconvenient power supply for the motor inside the shuttle body. At the same time, the selection of motor and control method of the external drive control part can be further expanded. The rear two sides of the shuttle body of this invention are respectively equipped with two sets of rapier support blocks. The weft insertion support rapier can be locked in the rapier support block on the shuttle body and drive the shuttle body forward under the drive of the weft insertion drive module to realize the weft insertion action, which greatly expands the weft insertion stroke of the shuttle body and increases the fabric weaving width. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention (excluding the lifting module);

[0025] Figure 2 This is the front view of the present invention (including the lifting module);

[0026] Figure 3 This is a schematic diagram of the structure of the left weft insertion module and the shuttle body of the present invention;

[0027] Figure 4 This is a schematic diagram of the right weft insertion module of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the left weft tube control module and the shuttle body of the present invention;

[0029] Figure 6 This is a schematic diagram of the shuttle body of the present invention;

[0030] Figure 7 This is a perspective structural diagram of the shuttle body of the present invention;

[0031] Figure 8 This is a schematic diagram of the transmission block of the present invention;

[0032] Figure 9 This is a schematic diagram of the internal structure of the transmission block and weft tube after assembly according to the present invention. Detailed Implementation

[0033] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0034] Furthermore, the terms "vertical," "horizontal," "top," "bottom," "front," "back," "upper," "lower," "inner," and "outer" mentioned in the embodiments of the present invention indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown, or the orientations or positional relationships in which the product is usually placed during use, are only for the purpose of facilitating the description of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] Example

[0037] As attached Figures 1-9 As shown, an externally motor-controlled weft take-up and take-up device includes two sets of weft insertion modules I and a shuttle body 1 arranged opposite to each other. The weft insertion module includes a weft insertion drive module II, a weft tube control module III mounted on the module motion slider of the weft insertion drive module, and a shuttle rest fixed to the end of the weft insertion drive module.

[0038] Two sets of weft insertion modules arranged opposite to each other are mounted on the lifting slider of the lifting module 200. The two sets of lifting modules drive the lifting slider to move and simultaneously drive the two sets of weft insertion modules to move up and down, so that the weaving opening 100 formed between the two sets of weft insertion modules can move up and down, and the weft insertion height can move with the up and down movement of the warp opening position.

[0039] The weft insertion module consists of a left weft insertion module and a right weft insertion module. The left and right weft insertion modules have the same structure. The left weft insertion module includes a left weft insertion drive module 2, a left weft tube control module 4 mounted on the left module motion slider 3 of the left weft insertion drive module 2, and a left shuttle rest 5 fixed to the end of the left weft insertion drive module 2.

[0040] The right weft insertion module includes a right weft insertion drive module 6, a right weft tube control module 8 mounted on the right module motion slider 7 of the right weft insertion drive module 6, and a right shuttle parking seat 9 fixed to the end of the right weft insertion drive module 6.

[0041] The shuttle body 1 can be positioned on the left shuttle rest 5 or the right shuttle rest 9. The shuttle body 1 can be positioned on the left shuttle rest 5 by the left shuttle locking pin 10 or on the right shuttle rest 9 by the right shuttle locking pin 11. The shuttle body 14 is provided with a shuttle stop slot 101. The left shuttle locking pin 10 can be inserted into the shuttle stop slot 101 to position the shuttle body 1 on the left shuttle rest 5, and the right shuttle locking pin 11 can be inserted into the shuttle stop slot 101 to position the shuttle body 1 on the right shuttle rest 9.

[0042] The left weft insertion drive module 2 or the right weft insertion drive module 6 drives the module movement slider on the gear rack structure, synchronous belt module or lead screw module under the drive element motor, thereby realizing the reciprocating motion of the weft tube control module on the module movement slider.

[0043] In this embodiment, the left weft insertion drive module 2 and the right weft insertion drive module 6 have the same structure and are arranged in a relative manner. Driven by the drive motor 12, they drive the left module motion slider 3 or the right module motion slider 7 on the lead screw module 13 to move, thereby realizing the reciprocating motion of the left weft tube control module 4 on the left module motion slider 3 or the reciprocating motion of the right weft tube control module 8 on the right module motion slider 7.

[0044] The left weft tube control module 4 and the right weft tube control module 8 have the same structure. Specifically, the left weft tube control module 4 includes a left drive mounting base 401, a left weft support rapier 402 mounted at the rear of the left drive mounting base 401, and a left weft tube lightweight drive shaft 403 rotatably mounted on the left drive mounting base. The left weft tube lightweight drive shaft 403 is driven by the left weft tube control motor 404 and rotates.

[0045] The right weft tube control module 8 includes a right drive mounting base 801, a right weft support rapier 802 mounted at the rear of the right drive mounting base, and a right weft tube lightweight drive shaft 803 rotatably mounted on the right drive mounting base. The right weft tube lightweight drive shaft 803 is driven by a right weft tube control motor 804 and rotates.

[0046] The shuttle body 1 includes a shuttle body 14. Two sets of rapier support blocks 15 are respectively installed on the rear two sides of the shuttle body 14, namely the left rapier support block 1501 and the right rapier support block 1502. Two sets of transmission blocks 16 are respectively rotatably installed on the front two sides of the shuttle body 14, namely the left transmission block 1601 and the right transmission block 1602. A weft tube 17 is detachably installed between the two sets of transmission blocks 16.

[0047] During the shuttle operation, the weft insertion support rapier can be engaged in the rapier support block on the shuttle body 1 and drive the shuttle body 1 forward under the drive of the weft insertion drive module; specifically, the left rapier support block 1501 or the right rapier support block 1502 is respectively provided with a guide groove 1503, the left weft insertion support rapier can be inserted into the guide groove 1503 on the left rapier support block 1501 for locking and positioning; the right weft insertion support rapier can be inserted into the guide groove on the right rapier support block 1502 for locking and positioning.

[0048] The lightweight drive shaft of the weft tube can be snapped onto the drive block 16 and, driven by the weft tube control motor, drives the weft tube to rotate, thereby achieving the unwinding control of the weft tube.

[0049] The weft tube control motor is a rotary motor. The weft tube control motor is connected to the lightweight weft tube drive shaft through a coupling 18. The front end of the lightweight weft tube drive shaft is provided with a flat boss. The rear part of the transmission block 16 is provided with a groove that fits into the flat boss. After the lightweight weft tube drive shaft is inserted into the transmission block 16 and connected, the weft tube is rotated under the drive of the weft tube control motor.

[0050] Specifically, the left weft tube control motor is connected to the left weft tube lightweight transmission shaft 403 via a coupling. The front end of the left weft tube lightweight transmission shaft 403 is provided with a flat boss 805, and the rear part of the left transmission block 1601 is provided with a groove 1603 that fits into the flat boss. After the left weft tube lightweight transmission shaft 403 is inserted into the left transmission block 1601 and connected, the weft tube is rotated under the drive of the left weft tube control motor.

[0051] The right weft tube control motor is connected to the right weft tube lightweight drive shaft 803 via a coupling. The front end of the right weft tube lightweight drive shaft 803 is provided with a flat boss, and the rear part of the right drive block 1602 is provided with a groove 1603 that fits into the flat boss. After the right weft tube lightweight drive shaft 803 is inserted into the right drive block 1602 and connected, the weft tube is rotated under the drive of the right weft tube control motor.

[0052] The front ends of the left transmission block 1601 and the right transmission block 1602 are respectively provided with bosses 1604, and the two ends of the weft tube are respectively provided with grooves that cooperate with the bosses. The grooves of the weft tube 17 can be fitted with the bosses 1604 of the left and right transmission blocks so that the weft tube can be detachably installed between the left and right transmission blocks.

[0053] The left transmission block 1601 and the right transmission block 1602 are rotatably mounted on the shuttle body 14 via bearings 19. A retaining spring 20 is snapped into the shuttle body 14. A spring 21 is connected between the retaining spring 20 and the bearing 19. When the weft tube is pressed to one side, the spring 21 is compressed, causing the boss on the other side of the weft tube to disengage from the boss of the transmission block, and the weft tube can then be removed.

[0054] The front side of the shuttle body 14 is equipped with a yarn guide block 22, and the yarn guide block 22 is provided with a yarn outlet 23. The weft yarn tube exits through the yarn outlet 23 located at the front end of the shuttle body 14 to avoid the yarn from rubbing against the shuttle body 1. A tension sensor is provided at the yarn outlet 23 to detect the tension of the yarn.

[0055] The weft insertion drive module drives the weft tube control module to move. The weft tube control module can drive the weft insertion support rapier and the lightweight weft tube drive shaft to move synchronously in the left and right directions. Each shuttle rest is provided with a rapier guide block 24 and a drive shaft guide block 25. The weft insertion support rapier is guided by the rapier guide block 24, and the lightweight weft tube drive shaft is guided by the drive shaft guide block 25, ensuring the straightness of the weft insertion support rapier and the lightweight weft tube drive shaft during the movement.

[0056] A weft insertion method using an externally motor-controlled weft take-up and release device, characterized by the following steps:

[0057] (1) After the left weft insertion support rapier is inserted into the guide groove on the rapier support block and clamps and positions the shuttle body 1 under the drive of the left weft insertion module, the left shuttle lock pin 10 is lifted, and then the left weft insertion module moves the shuttle body 1 forward from the left shuttle feeding start position to the right shuttle resting seat 9. After the right shuttle lock pin 11 is lowered, the shuttle body 1 is positioned on the right shuttle resting seat 9, and the left weft insertion module drives the left weft insertion support rapier to reset to the left shuttle feeding start position.

[0058] (2) During the weft insertion process, the unwinding of the weft tube is driven by the left weft tube control motor of the left weft tube control module to rotate the left weft tube lightweight transmission shaft. The transmission block drives the weft tube to rotate synchronously, and the torque of the weft tube is fed back to the left weft tube control motor through the left weft tube lightweight transmission shaft. By utilizing the variation law of the weft tube winding diameter and the constant torque mode of the left weft tube control motor, stable tension control of the weft yarn can be achieved. If a reserved length of weft yarn is required during the weaving process, a fixed length of weft unwinding action can be achieved.

[0059] (3) When the next shuttle begins, the right weft insertion support rapier is inserted into the guide groove on the rapier support block and locked and positioned by the right weft insertion module. Then the right shuttle lock pin 11 is lifted. Then the right weft insertion module moves the shuttle body 1 forward from the right shuttle feeding start position to the left shuttle resting seat. After the left shuttle lock pin 10 is lowered, the shuttle body 1 is positioned on the left shuttle resting seat. The right weft insertion module drives the right weft insertion support rapier to reset to the right shuttle feeding start position. The reciprocating weft insertion action is realized in sequence.

[0060] (4) During the weft insertion process, the unwinding of the weft tube is driven by the right weft tube control motor of the right weft tube control module 8 to rotate the right weft tube lightweight transmission shaft 803. The transmission block 16 drives the weft tube to rotate synchronously, and the torque of the weft tube is fed back to the right weft tube control motor through the right weft tube lightweight transmission shaft 803. By utilizing the variation law of the weft tube winding diameter and the constant torque mode of the right weft tube control motor, stable tension control of the weft yarn can be achieved. If a reserved length of weft yarn is required during the weaving process, the weft unwinding action of a fixed length can be achieved.

[0061] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A weft yarn take-up and untake-up device controlled by an external motor, characterized in that: The device includes two sets of weft insertion modules and a shuttle body arranged opposite to each other. The weft insertion module includes a weft insertion drive module, a weft tube control module mounted on the module motion slider of the weft insertion drive module, and a shuttle rest fixed at the end of the weft insertion drive module. The shuttle body can be positioned on the shuttle rest. The weft tube control module includes a transmission mounting base, a weft insertion support rapier mounted at the rear of the transmission mounting base, and a lightweight weft tube drive shaft rotatably mounted on the transmission mounting base. The lightweight weft tube drive shaft is driven and rotated by a weft tube control motor. The shuttle body includes a shuttle body. Two sets of rapier support blocks are respectively mounted on the rear two sides of the shuttle body, and two sets of transmission blocks are respectively rotatably mounted on the front two sides of the shuttle body. A weft tube is detachably mounted between the two sets of transmission blocks. The weft insertion support rapier can be engaged in the rapier support block on the shuttle body and drive the shuttle body forward under the drive of the weft insertion drive module; The lightweight drive shaft of the weft tube can be snapped onto the drive block and, driven by the weft tube control motor, drives the weft tube to rotate, thereby realizing the unwinding control of the weft tube. Two sets of weft insertion modules arranged opposite to each other are mounted on the lifting sliders of the lifting module. The two sets of lifting modules drive the lifting sliders to move and simultaneously drive the two sets of weft insertion modules to move up and down, so that the weaving opening formed between the two sets of weft insertion modules can move up and down, and the weft insertion height can move with the up and down movement of the warp opening position. The shuttle body can be positioned on the shuttle rest seat by means of the shuttle locking pin; the rapier support block is provided with a guide groove.

2. The externally motor-controlled weft take-up and take-up device according to claim 1, characterized in that: The weft insertion module consists of a left weft insertion module and a right weft insertion module, which have the same structure. The left weft insertion module includes a left weft insertion drive module, a left weft tube control module mounted on the left module motion slider of the left weft insertion drive module, and a left shuttle rest fixed at the end of the left weft insertion drive module. The right weft insertion module includes a right weft insertion drive module, a right weft tube control module mounted on the right module motion slider of the right weft insertion drive module, and a right shuttle rest fixed at the end of the right weft insertion drive module. The left or right weft insertion drive module drives the module motion slider on the gear rack structure, synchronous belt module, or lead screw module to move under the drive of the drive element, thereby realizing the reciprocating motion of the weft tube control module on the module motion slider.

3. The externally motor-controlled weft take-up and take-up device according to claim 1, characterized in that: The shuttle body is provided with a shuttle stop slot, and the shuttle locking pin can be inserted into the shuttle stop slot to position the shuttle body on the shuttle rest seat.

4. The externally motor-controlled weft take-up and take-up device according to claim 1, characterized in that: The weft insertion support rapier can be inserted into the guide groove on the rapier support block for locking and positioning.

5. The externally motor-controlled weft take-up and take-up device according to claim 1, characterized in that: The weft tube control motor is a rotary motor. The weft tube control motor is connected to the lightweight weft tube drive shaft through a coupling. The front end of the lightweight weft tube drive shaft is provided with a flat boss. The rear part of the transmission block is provided with a groove that fits into the flat boss. After the lightweight weft tube drive shaft is inserted into the transmission block and connected, the weft tube is rotated under the drive of the weft tube control motor.

6. The externally motor-controlled weft take-up and take-up device according to claim 1, characterized in that: The front end of the transmission block is provided with a boss, and both ends of the weft tube are respectively provided with grooves that cooperate with the boss. The grooves of the weft tube can be fitted with the boss of the transmission block so that the weft tube can be detachably installed between the two sets of transmission blocks.

7. The externally motor-controlled weft take-up and take-up device according to claim 6, characterized in that: The transmission block is rotatably mounted on the shuttle body via a bearing, and a retaining spring is snapped into the shuttle body. A spring is connected between the retaining spring and the bearing. When the weft tube is pressed to one side, the spring is compressed, causing the groove on the other side of the weft tube to disengage from the boss of the transmission block, and the weft tube can then be removed.

8. The externally motor-controlled weft take-up and take-up device according to claim 1, characterized in that: The front side of the shuttle body is equipped with a yarn guide block, and the yarn guide block is provided with a yarn outlet. The weft yarn tube exits through the yarn outlet located at the front end of the shuttle body to avoid the yarn from rubbing against the shuttle body. A tension sensor is provided at the yarn outlet to detect the tension of the yarn.

9. The externally motor-controlled weft take-up and take-up device according to claim 1, characterized in that: The weft insertion drive module drives the weft tube control module to move. The weft tube control module can drive the weft insertion support rapier and the lightweight weft tube drive shaft to move synchronously in the left and right directions. Each shuttle rest is equipped with a rapier guide block and a drive shaft guide block. The weft insertion support rapier is guided by the rapier guide block, and the lightweight weft tube drive shaft is guided by the drive shaft guide block, ensuring the straightness of the weft insertion support rapier and the lightweight weft tube drive shaft during the movement.

10. A weft insertion method using an externally motor-controlled weft take-up and release tube device as described in any one of claims 1 to 9, characterized in that: Includes the following steps: (1) After the left weft insertion support rapier is inserted into the guide groove on the rapier support block and clamps the positioning shuttle body under the drive of the left weft insertion module, the left shuttle lock pin is lifted, and then the left weft insertion module moves the shuttle body forward from the left shuttle feeding start position to the right shuttle resting seat. After the right shuttle lock pin is lowered, the shuttle body is positioned on the right shuttle resting seat, and the left weft insertion module drives the left weft insertion support rapier to reset to the left shuttle feeding start position. (2) During the weft insertion process, the unwinding of the weft tube is driven by the left weft tube control motor of the left weft tube control module to rotate the left weft tube lightweight transmission shaft. The transmission block drives the weft tube to rotate synchronously, and the torque of the weft tube is fed back to the left weft tube control motor through the left weft tube lightweight transmission shaft. By utilizing the variation law of the weft tube winding diameter and the constant torque mode of the left weft tube control motor, stable tension control of the weft yarn can be achieved. If a reserved length of weft yarn is required during the weaving process, the weft unwinding action of a fixed length can be achieved. (3) When the next shuttle begins, the right weft insertion support rapier is inserted into the guide groove on the rapier support block and clamps the shuttle body under the drive of the right weft insertion module. Then the right shuttle lock pin is lifted. Then the right weft insertion module moves the shuttle body forward from the right shuttle feeding start position to the left shuttle resting seat. After the left shuttle lock pin is lowered, the shuttle body is positioned on the left shuttle resting seat. The right weft insertion module drives the right weft insertion support rapier to reset to the right shuttle feeding start position. The reciprocating weft insertion action is realized in sequence. (4) During the weft insertion process, the unwinding of the weft tube is driven by the right weft tube control motor of the right weft tube control module to rotate the right weft tube lightweight transmission shaft. The transmission block drives the weft tube to rotate synchronously, and the torque of the weft tube is fed back to the right weft tube control motor through the right weft tube lightweight transmission shaft. By utilizing the variation law of the weft tube winding diameter and the constant torque mode of the right weft tube control motor, stable tension control of the weft yarn can be achieved. If a reserved length of weft yarn is required during the weaving process, the weft unwinding action of a fixed length can be achieved.

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