Driving mechanism of a circular knitting machine

Abstract

The utility model relates to a big circle machine technical field discloses a big circle machine cloth reel's drive mechanism. The drive mechanism of the utility model, include: servo motor, speed reducer, cloth reel, transmission mechanism, monitoring mechanism and controller, servo motor, speed reducer and cloth reel set up on the frame, and the input of speed reducer is connected with servo motor output shaft, and transmission mechanism includes: first bevel gear and second bevel gear, both respectively set up on the output shaft of speed reducer and cloth reel, and monitoring mechanism includes: flange and photoelectric sensor, and the flange is established on cloth reel, and is equipped with the gap, and photoelectric sensor is connected with servo motor encoder, and the encoder is connected with controller. The drive mechanism of the utility model, photoelectric sensor sends pulse signal when detecting the flange gap, and the controller according to pulse frequency monitors the running state of servo motor and speed reducer, and controls the rotating speed of cloth reel, adopts bevel gear cooperation transmission, and the operation is stable, and the noise is low and the torsion is big.

Description

Technical Field

[0001] This utility model relates to the field of circular knitting machine technology, specifically to a drive mechanism for a circular knitting machine. Background Technology

[0002] Circular knitting machines, also known as circular weft knitting machines, have developed rapidly and gained widespread use due to their numerous loop-forming systems, high speed, high output, rapid pattern changes, good fabric quality, fewer processes, and strong product adaptability.

[0003] A circular knitting machine includes a weaving mechanism and a fabric winding mechanism (fabric winding machine). The fabric winding mechanism includes a traction component and a take-up component. The weaving mechanism of the circular knitting machine weaves the fabric. The woven fabric is held and pulled by the traction rollers of the traction component, and then wound onto the winding rollers of the take-up component of the fabric winding machine to form a fabric roll. The winding rollers of the fabric winding machine are driven by a servo motor.

[0004] The inventors of this application discovered that the servo motor of the fabric rolling machine is connected to the fabric rolling roller through a reducer. If the reducer fails or the servo motor fails, the control system cannot detect the running status of the fabric rolling shaft of the fabric rolling machine. Therefore, the machine will not stop. After running for a long time, the fabric is likely to pile up, and the fabric may even be rolled into the frame, causing damage to the machine. Utility Model Content

[0005] The purpose of this utility model is to provide a drive mechanism for a large circular knitting machine to solve the problems mentioned in the background art.

[0006] This utility model embodiment provides a drive mechanism for a large circular knitting machine, including: a servo motor, a reducer, a fabric rolling roller, a transmission mechanism, a monitoring mechanism, and a controller;

[0007] The servo motor, the reducer, and the fabric rolling roller are mounted on the fabric rolling machine frame, and the input end of the reducer is connected to the output shaft of the servo motor.

[0008] The transmission mechanism includes: a first bevel gear and a second bevel gear;

[0009] The first bevel gear is sleeved on the output shaft of the reducer, the second bevel gear is sleeved on the fabric roll, and the first bevel gear and the second bevel gear are meshed with each other. The servo motor is used to drive the fabric roll to rotate.

[0010] The monitoring mechanism includes: a flange and photoelectric sensors;

[0011] The flange is sleeved on the fabric roll, and the flange is evenly provided with multiple notches along the circumference. The photoelectric sensor is electrically connected to the encoder of the servo motor and is used to send a pulse signal to the encoder of the servo motor when the notch is detected.

[0012] The encoder of the servo motor is electrically connected to the controller. The encoder of the servo motor is used to send a pulse frequency to the controller, and the controller is used to control the rotation speed of the fabric roll according to the pulse frequency.

[0013] Based on the above scheme, the drive mechanism of the circular knitting machine of this utility model includes a servo motor, a reducer, a fabric rolling roller, a transmission mechanism, a monitoring mechanism, and a controller. The servo motor, reducer, and fabric rolling roller are mounted on the frame of the fabric rolling machine. The transmission mechanism includes a first bevel gear and a second bevel gear. The first bevel gear is mounted on the output shaft of the reducer, and the second bevel gear is mounted on the fabric rolling roller. The two gears are meshed with each other. The monitoring mechanism includes a flange and a photoelectric sensor. The flange is mounted on the fabric rolling roller and has multiple notches. When the photoelectric sensor detects a notch, it sends a pulse signal to the encoder of the servo motor. The encoder of the servo motor is electrically connected to the controller, and the controller controls the rotation speed of the fabric rolling roller according to the pulse frequency sent by the encoder. The drive mechanism of this circular knitting machine for fabric winding features a reducer and a fabric winding roller that are driven by a bevel gear set, resulting in smooth operation, low noise, and high torque. A servo motor drives the fabric winding roller and flange to rotate. A photoelectric sensor monitors the operation of the fabric winding roller by detecting the operating status of the flange, thereby monitoring whether the servo motor and / or reducer are working properly. When the servo motor and / or reducer malfunctions and causes the fabric winding roller to operate abnormally, the equipment will promptly alarm and stop, preventing the fabric from piling up or breaking due to abnormal operation of the fabric winding roller, and ensuring the safe operation of the equipment.

[0014] One feasible solution also includes: a fixing base and a mounting base;

[0015] The fixing seat is mounted on the frame of the fabric rolling machine and is sleeved on the fabric rolling roller;

[0016] The mounting base is disposed on the fixed base, and the photoelectric sensor is disposed on the mounting base.

[0017] In one feasible solution, the fixed base is provided with a self-aligning ball bearing, and the fabric roll passes through the self-aligning ball bearing.

[0018] One feasible solution also includes: a dust cover;

[0019] The dust cover is mounted on the mounting base to shield the photoelectric sensor and the flange.

[0020] In one feasible solution, the mounting base is semi-circular and has a recessed portion;

[0021] The photoelectric sensor is disposed in the recessed portion;

[0022] The dust cover includes: a semi-circular bottom plate and a surrounding plate;

[0023] The semi-circular base plate is fixed on the mounting base, and the surrounding plate forms a shield for the photoelectric sensor.

[0024] In one feasible solution, the flange is provided with a protruding retaining ring, which is fixed to the fabric roll roller by a fixing set screw.

[0025] One feasible solution also includes: a safety shield;

[0026] The safety guard is installed on the frame of the fabric rolling machine to cover the first bevel gear and the second bevel gear.

[0027] In one feasible solution, the fabric rolling roller is a rubber roller. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the drive mechanism of the large circular knitting machine in an embodiment of this utility model;

[0030] Figure 2 As described in the embodiments of this utility model Figure 1 A magnified view of a portion of the image;

[0031] Figure 3 This is a schematic diagram of the installation of the fabric rolling roller in an embodiment of this utility model;

[0032] Figure 4 As described in the embodiments of this utility model Figure 3 A magnified view of a portion of the image;

[0033] Figure 5 This is a schematic diagram of the monitoring mechanism in an embodiment of the present utility model.

[0034] Numbering on the map:

[0035] 1. Servo motor; 11. Encoder; 2. Reducer; 3. Fabric roll; 4. Transmission mechanism; 41. First bevel gear; 42. Second bevel gear; 5. Monitoring mechanism; 51. Flange; 511. Notch; 512. Protruding retaining ring; 52. Photoelectric sensor; 61. Fixing base; 611. Self-aligning ball bearing; 62. Mounting base; 621. Recess; 622. Protrusion; 63. Dust cover; 631. Semi-circular bottom plate; 632. Enclosure; 100. Side plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 a limitation of this utility model.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0040] As described in the background section of this application, a circular knitting machine includes a weaving mechanism and a fabric winding mechanism (fabric winding machine). The fabric winding mechanism includes a traction component and a take-up component. The weaving mechanism of the circular knitting machine weaves the fabric, and the woven fabric is held and pulled by the traction roller of the traction component, and then wound onto the winding roller of the take-up component of the fabric winding machine to form a fabric roll. The winding roller of the fabric winding machine is driven by a servo motor.

[0041] The inventors of this application discovered that the servo motor of the fabric rolling machine is connected to the fabric rolling roller through a reducer. If the reducer fails or the servo motor fails, the control system cannot detect the running status of the fabric rolling shaft of the fabric rolling machine. Therefore, the machine will not stop. After running for a long time, the fabric is likely to pile up, and the fabric may even be rolled into the frame, causing damage to the machine.

[0042] To address the aforementioned problems, the inventors of this application have proposed a technical solution, the specific embodiments of which are as follows:

[0043] Figure 1 This is a schematic diagram of the drive mechanism of the large circular knitting machine in an embodiment of this utility model. Figure 2 As described in the embodiments of this utility model Figure 1 A magnified view of a portion of the image. Figure 3 This is a schematic diagram of the installation of the fabric rolling roller in an embodiment of this utility model. Figure 4 As described in the embodiments of this utility model Figure 3 A magnified view of a portion of the image. Figure 5 This is a schematic diagram of the monitoring mechanism in an embodiment of the present utility model.

[0044] like Figures 1 to 5 As shown, the drive mechanism of the circular knitting machine in this embodiment includes: a servo motor 1, a reducer 2, a fabric rolling roller 3, a transmission mechanism 4, a monitoring mechanism 5, and a controller.

[0045] Servo motor 1 and reducer 2 are respectively fixedly mounted on the frame of the fabric rolling machine, and the input end of reducer 2 is fixedly connected to the output shaft of servo motor 1.

[0046] The two ends of the fabric rolling roller 3 are rotatably mounted on the frame of the fabric rolling machine via bearings.

[0047] The transmission mechanism 4 includes: a first bevel gear 41 and a second bevel gear 42.

[0048] The first bevel gear 41 is sleeved on the output shaft of the reducer 2 and is fixedly connected to the output shaft of the reducer 2. The second bevel gear 42 is sleeved on the fabric winding roller 3 and is fixedly connected to the fabric winding roller 3. The first bevel gear 41 and the second bevel gear 42 are meshed with each other. The servo motor 1 drives the fabric winding roller 3 to rotate through the reducer 2, the first bevel gear 41 and the second bevel gear 42. When the fabric winding roller 3 rotates, it winds up the fabric woven by the circular knitting machine mechanism.

[0049] The monitoring device 5 includes: flange 51 and photoelectric sensor 52.

[0050] The flange 51 is fixedly sleeved on the fabric rolling roller 3 and rotates together with the fabric rolling roller 3. The flange 51 has multiple notches 511 spaced at intervals on its circumferential sidewalls, and these notches 511 are evenly distributed along the circumference of the flange 51. A photoelectric sensor 52 is fixedly mounted and electrically connected to the encoder 11 of the servo motor 1. The photoelectric sensor 52 is used to send a pulse signal to the encoder 11 of the servo motor 1 when it detects a notch 511 in the flange 51.

[0051] The encoder 11 of the servo motor is electrically connected to the controller. The encoder 11 of the servo motor is used to detect the pulse signals of the flange 51 and the photoelectric sensor 52, and sends the pulse frequency to the controller. The controller receives the pulse frequency sent by the encoder 11 of the servo motor, and outputs the frequency control signal of the servo drive according to the pulse frequency, thereby controlling the rotation speed of the servo motor 1 and the fabric roll 3, realizing the tension control of the wound fabric, and realizing the monitoring of the motion status of the servo motor 1 and the fabric roll 3.

[0052] In this embodiment, it is assumed that the current running speed SP1 of the large circular knitting mechanism is 6 rpm, and the size of the fabric is L (3.3 cm) / minute.

[0053] The relevant parameters of the fabric rolling machine are as follows: the transmission ratio between the encoder installation position and the machine's main disc is D1 (59.28), the transmission ratio between the second bevel gear on the fabric rolling roller and the first bevel gear on the reducer is D2 (2), the reduction ratio of the reducer is D3 (50), the diameter of the fabric rolling roller is D (10cm), and the current encoder's operating speed per minute is SP2 (355.68).

[0054] Based on the calculation formula for servo motor operation: SP=(L*SP2*D2*D3) / (D1*3.1416*D), the number of revolutions SP of the servo motor per minute can be calculated.

[0055] SP = (L*SP2*D2*D3) / (D1*3.1416*D)≈63 laps / minute.

[0056] The servo motor's operation is detected by the encoder's pulse frequency. The encoder's installation position and transmission ratio to the machine's main disc are 59.28, and the encoder generates 500 pulses per revolution. When the machine's main disc runs at 6 rpm, the encoder's pulse frequency per minute is approximately 60 / 6*59.28*500 ≈ 30 kHz. The real-time data provided by the encoder monitors the operation of the servo motor and the fabric winding roller, triggering an alarm immediately upon detecting any deviation. If the flange has 50 notches, the photoelectric sensor can detect 50 pulse signals per revolution of the fabric winding roller. The encoder will definitely detect one photoelectric sensor pulse within two notch cycles. For example, if the fabric roll size of a circular knitting machine is 3.3cm per revolution, the diameter of the roll is 10cm, and the circumference of the roll is 10 x 3.14 = 31.4cm, the arc length of each pulse is 31.4 / 50 = 0.628cm, and the number of pulses generated per revolution is 3.3 / 0.628 ≈ 5. The machine will trigger an alarm after running 2 / 5 of a revolution. That is, if a servo motor or reducer malfunctions and causes the roll to stop, the machine's weaving mechanism will stop and trigger an alarm after rotating a maximum of 2 / 5 of a revolution, preventing fabric accumulation.

[0057] If it is necessary to further increase the machine's response speed to fabric roll failures, the number of flange notches can be increased.

[0058] As can be seen from the above, the drive mechanism of the circular knitting machine in this embodiment includes a servo motor, a reducer, a fabric roll, a transmission mechanism, a monitoring mechanism, and a controller. The servo motor, reducer, and fabric roll are mounted on the machine frame. The transmission mechanism includes a first bevel gear and a second bevel gear. The first bevel gear is mounted on the output shaft of the reducer, and the second bevel gear is mounted on the fabric roll. The two gears mesh with each other. The monitoring mechanism includes a flange and a photoelectric sensor. The flange is mounted on the fabric roll and has multiple notches. When the photoelectric sensor detects a notch, it sends a pulse signal to the encoder of the servo motor. The encoder of the servo motor is electrically connected to the controller, and the controller controls the rotational speed of the fabric roll according to the pulse frequency sent by the encoder. In this embodiment, the drive mechanism of the circular knitting machine for fabric winding has a reducer and a fabric winding roller connected by a bevel gear set, resulting in smooth operation, low noise, and high torque. A servo motor drives the fabric winding roller and the flange to rotate. A photoelectric sensor monitors whether the fabric winding roller is operating normally by detecting the operating status of the flange, thereby monitoring whether the servo motor and / or reducer are working properly. When the servo motor and / or reducer malfunctions and causes the fabric winding roller to operate abnormally, the equipment will promptly alarm and stop, preventing the fabric from accumulating or breaking due to abnormal operation of the fabric winding roller, and ensuring the safe operation of the equipment.

[0059] Optionally, the drive mechanism of the large circular knitting machine in this embodiment further includes: a fixed base 61 and a mounting base 62.

[0060] The fixing seat 61 is fitted onto the fabric rolling roller 3 and fixed to the side plate 100 of the fabric rolling machine frame.

[0061] Mounting base 62 is disposed on the end face of fixed base 61, and photoelectric sensor 52 is disposed on mounting base 62.

[0062] Furthermore, in the drive mechanism of the large circular knitting machine in this embodiment, a self-aligning ball bearing 611 is provided at the center of the fixed base 61, and the fabric roll 3 is installed in the self-aligning ball bearing 611 of the fixed base 61. The self-aligning ball bearing 611 can compensate for mechanical errors during the installation of the fabric roll 3, and facilitate the quick installation of the fabric roll 3.

[0063] Furthermore, the drive mechanism of the large circular knitting machine in this embodiment also includes a dust cover 63.

[0064] The dust cover 63 is installed on the mounting base 61. After installation, the dust cover 63 will cover the photoelectric sensor 52 and the flange 51 to ensure the stable operation of the photoelectric sensor 52.

[0065] Furthermore, in this embodiment, the drive mechanism of the large circular knitting machine has a semi-circular mounting base 62, and a recessed portion 621 is provided on one end face of the mounting base 62.

[0066] The dust cover 63 includes a semi-circular base plate 631 and a surrounding plate 632. The surrounding plate 632 is disposed on one side of the semi-circular base plate 631 and is located at the circumferential edge of the semi-circular base plate 631.

[0067] The photoelectric sensor 52 is disposed in the recess 621 of the mounting base 62, and the semi-circular bottom plate 631 of the dust cover 63 is fixed on the protrusion 622 of the mounting base 62. The surrounding plate 632 of the dust cover 63 forms a shield for the photoelectric sensor 52.

[0068] In this embodiment, the photoelectric sensor is fixed in the recessed part of the mounting base, and the semi-circular bottom plate of the dust cover is fixed in the protruding part of the mounting base, thereby reducing the overall thickness of the mounting base and the dust cover, and reducing the installation space occupied by the mounting base and the photoelectric sensor.

[0069] Furthermore, in the drive mechanism of the large circular knitting machine in this embodiment, a protruding fixing ring 512 is provided on one side of the flange 51, and the protruding fixing ring 512 is provided with multiple fixing holes along the circumferential direction.

[0070] The flange 51 is fitted onto the fabric rolling roller 3, and the protruding fixing ring 512 of the flange 51 is fixed to the fabric rolling roller 3 by fixing set screws, which facilitates the fixing of the flange 51.

[0071] Optionally, the drive mechanism of the large circular knitting machine in this embodiment further includes a safety guard.

[0072] A safety guard (not shown in the figure) is installed on the frame of the fabric rolling machine to cover the first bevel gear 41 and the second bevel gear 42 of the transmission mechanism 4, so as to ensure the safe operation of the equipment.

[0073] Furthermore, in this embodiment, the drive mechanism of the circular knitting machine for winding fabric has a rubber roller as the winding roller 3.

[0074] In this utility model, unless otherwise explicitly specified and limited, the first feature being "on" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium.

[0075] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "under," and "beneath" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0076] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A drive mechanism for a large circular knitting machine, characterized in that, include: Servo motors, reducers, fabric rolls, transmission mechanisms, monitoring mechanisms, and controllers; The servo motor, the reducer, and the fabric rolling roller are mounted on the fabric rolling machine frame, and the input end of the reducer is connected to the output shaft of the servo motor. The transmission mechanism includes: a first bevel gear and a second bevel gear; The first bevel gear is sleeved on the output shaft of the reducer, the second bevel gear is sleeved on the fabric roll, and the first bevel gear and the second bevel gear are meshed with each other. The servo motor is used to drive the fabric roll to rotate. The monitoring mechanism includes: a flange and photoelectric sensors; The flange is fitted onto the fabric roll, and the flange has multiple notches evenly distributed along the circumference. The photoelectric sensor is electrically connected to the encoder of the servo motor and is used to send a pulse signal to the encoder of the servo motor when the notch is detected. The encoder of the servo motor is electrically connected to the controller. The encoder of the servo motor is used to send a pulse frequency to the controller, and the controller is used to control the rotation speed of the fabric roll according to the pulse frequency.

2. The driving mechanism of the large circular knitting machine according to claim 1, characterized in that, Also includes: Fixed base and mounting base; The fixing seat is mounted on the frame of the fabric rolling machine and is sleeved on the fabric rolling roller; The mounting base is disposed on the fixed base, and the photoelectric sensor is disposed on the mounting base.

3. The driving mechanism of the large circular knitting machine according to claim 2, characterized in that, The fixed base is equipped with a self-aligning ball bearing, and the fabric rolling roller passes through the self-aligning ball bearing.

4. The driving mechanism of the large circular knitting machine according to claim 2, characterized in that, Also includes: Dust cover; The dust cover is mounted on the mounting base to shield the photoelectric sensor and the flange.

5. The driving mechanism of the large circular knitting machine according to claim 4, characterized in that, The mounting base is semi-circular and has a recessed portion; The photoelectric sensor is disposed in the recessed portion; The dust cover includes: a semi-circular bottom plate and a surrounding plate; The semi-circular base plate is fixed on the mounting base, and the surrounding plate forms a shield for the photoelectric sensor.

6. The driving mechanism of the large circular knitting machine according to claim 1, characterized in that, The flange is provided with a protruding retaining ring, which is fixed to the fabric rolling roller by a fixing set screw.

7. The driving mechanism of the large circular knitting machine according to claim 1, characterized in that, Also includes: Safety shield; The safety guard is installed on the frame of the fabric rolling machine to cover the first bevel gear and the second bevel gear.

8. The drive mechanism of the large circular knitting machine according to any one of claims 1 to 7, characterized in that, The fabric rolling roller is a rubber roller.

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