Circular knitting machine capable of dynamically adjusting space between tensioning rollers

Abstract

The utility model relates to the technical field of circular knitting machines, in particular to a circular knitting machine capable of dynamically adjusting the distance between tensioning rollers, which comprises a circular knitting machine body, and a machine frame capable of rotating around the central position of the circular knitting machine body is arranged at the bottom inside the circular knitting machine body. A winding assembly used for winding textiles and a tensioning assembly used for tensioning the textiles are arranged on the machine frame, the winding assembly is arranged at the discharging end of the tensioning assembly, and the tensioning assembly comprises two tensioning roller bodies which are rotationally arranged on the machine frame and can synchronously move in the opposite direction or the relative direction. The tensioning assembly further comprises adjusting assemblies which are distributed on the two sides of the machine frame and can drive the tensioning roller bodies to move synchronously. The two tensioning rollers move synchronously through the adjusting assembly, the detection assembly is further arranged to detect the moving distance of the tensioning rollers in real time, and dynamic adjustment of the tensioning rollers is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of circular knitting machines, in particular to a circular knitting machine with dynamically adjusted spacing between tensioning rollers. Background Art

[0002] Circular knitting machines, also known as circular weft knitting machines (or circular weft knitting machines), are important pieces of equipment in the textile machinery industry. They can generally be divided into two categories: single-sided and double-sided. Single-sided circular knitting machines, such as standard single-sided circular knitting machines, single-sided terry knitting machines, and jacquard single-sided circular knitting machines, have a single needle cylinder. Double-sided circular knitting machines, such as rib knitting machines, standard double-sided circular knitting machines, and double-sided jacquard circular knitting machines, have an upper needle cylinder (commonly known as a dial) and a lower needle cylinder, arranged perpendicular to each other. Existing circular knitting machines generally clamp the fabric between two tensioning rollers before winding it onto a take-up roller for reeling.

[0003] Chinese patent CN219363973U discloses a circular knitting machine comprising a knitting machine body with two symmetrical frames fixedly connected to its bottom. A guardrail is provided on the outer side of the knitting machine body. The knitting machine body also includes a tensioning unit, with its ends slidably connected to the two frames, and a cloth rolling unit disposed below the tensioning unit. The patent utilizes two bidirectional screws connected by a belt to rotate synchronously, thereby moving two tensioning rollers and adjusting the spacing between them.

[0004] In the prior art, some circular knitting machines with tension roller spacing adjustment functions use a belt drive mechanism to achieve synchronous rotation of two bidirectional screws, thereby driving the two tension rollers to adjust their spacing. Specifically, this transmission mechanism places a belt over pulleys mounted on the ends of the bidirectional screws, utilizing the friction between the belt and the pulley to transmit power, enabling the two bidirectional screws to rotate synchronously, thereby driving the tension rollers to move synchronously. However, this belt-driven tension roller spacing adjustment method has significant technical drawbacks in practical applications. Because the power transmission between the belt and the pulley relies on friction, it is easily affected by various factors during the transmission process, causing slippage. This makes it difficult for the two bidirectional screws to maintain precise synchronous rotation. Once the bidirectional screws rotate out of sync, the movement speed and displacement of the two tension rollers will deviate, resulting in uneven adjustment of the channel width formed by the two tension rollers, affecting the quality of the knitted fabric. Utility Model Content

[0005] The purpose of the utility model is to provide a circular knitting machine with dynamic adjustment of the spacing between tensioning rollers. An adjustment component is adopted to make two tensioning rollers move synchronously, and a detection component is also provided to detect the distance moved by the tensioning rollers in real time, thereby realizing dynamic adjustment of the tensioning rollers.

[0006] In order to solve the problems of the existing technology, the utility model provides a large circular knitting machine with dynamically adjusted spacing between tensioning rollers, comprising a large circular knitting machine body, a frame that can rotate around the center position of the large circular knitting machine body is provided at the bottom of the interior of the large circular knitting machine body, a winding assembly that can be used to wind up the textile and a tensioning assembly for tensioning the textile are provided on the frame, the winding assembly is arranged at the discharge end of the tensioning assembly, the tensioning assembly includes two tensioning roller bodies that are rotatably arranged on the frame and can move synchronously toward or relative to each other, and the tensioning assembly also includes adjustment assemblies distributed on both sides of the frame and can drive the tensioning roller bodies to move synchronously.

[0007] Preferably, the two side surfaces of the frame are provided with slide grooves along the width direction of the frame, the adjusting assembly includes two groups of movable blocks that can slide in the slide grooves and can be movably connected to the two ends of the tensioning roller body, the movable blocks are connected to the connecting rods through shafts, the tensioning assembly also includes a telescopic driving member vertically fixed to the side surface of the frame, the output end of the telescopic driving member is connected to the connecting rod, and the tensioning assembly also includes a detection assembly that can detect the moving distance of the tensioning roller body.

[0008] Preferably, the detection component includes a photoelectric sensor installed on the side of the frame, and the photoelectric sensor is arranged horizontally on the side of the frame. The detection component also includes a laser emitter installed on the moving block, and the laser emitted by the laser emitter can be received by the photoelectric sensor.

[0009] Preferably, the winding assembly includes a winding roller that can be rotatably arranged in the frame, and the winding assembly also includes a driving assembly for driving the winding roller to rotate.

[0010] Preferably, the drive assembly includes a first clamping disk and a second clamping disk that can clamp the winding roller from both ends respectively. The drive assembly also includes a rotating drive member for driving the first clamping disk to rotate, and the output end of the rotating drive member is connected to the first clamping disk, and there are card slots distributed on both sides of the winding roller.

[0011] Preferably, a plurality of first latches are distributed on the first clamping disc, and the first latches can be inserted into the slots on one side of the winding roller.

[0012] Preferably, the second clamping disc is provided with a plurality of second latches, and the second latches can be inserted into the slots on the other side of the winding roller.

[0013] Preferably, the driving assembly further comprises a threaded rod arranged on the frame, one end of the threaded rod is connected to a handle, and the other end of the threaded rod is connected to a connecting disk, and the connecting disk is rotatably connected to the second clamping disk.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present application is configured with two synchronously moving tensioning roller bodies, and an adjustment component is used to achieve synchronous displacement control of the two tensioning roller bodies. Specifically, the adjustment component uses a telescopic drive as the core drive unit, and its output end is connected to a connecting rod. When the telescopic drive is started, the connecting rod moves, thereby driving the moving block articulated thereto to synchronously translate along a preset track. This causes the tensioning roller body to move. Through this structure, the two tensioning roller bodies achieve synchronous linear displacement under the drive of the telescopic drive, effectively simplifying the complex mechanical conversion links in the traditional bidirectional screw-belt transmission structure, and significantly reducing the cumulative error and failure risk of the transmission chain;

[0016] 2. In order to further improve the synchronization accuracy of the displacement at both ends of the tensioning roller body, this application introduces a closed-loop feedback control system based on photoelectric detection. A laser emitter is fixedly installed on each moving block, and the laser beam emitted by it forms an optical path match with the corresponding photoelectric sensor set on the frame. The photoelectric sensor converts the optical signal into an electrical signal output. During the dynamic adjustment process, the control system of the large circular machine continuously monitors the feedback data of the two photoelectric sensors and calculates the actual displacement difference at both ends of the tensioning roller body. When it is detected that the displacement deviation at both ends exceeds the preset threshold, the displacement lag end is dynamically compensated by adjusting the movement amount of the telescopic drive until the displacement deviation at both ends returns to the allowable range. This closed-loop control system not only eliminates the influence of machining errors and assembly gaps on synchronization, but also effectively suppresses the displacement deviation caused by external disturbances, ensuring the real-time consistency of the displacement at both ends of the tensioning roller body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural diagram of a circular knitting machine with dynamically adjusted spacing between tension rollers according to the present invention;

[0018] Figure 2 This is a schematic diagram of the first internal three-dimensional structure of a circular knitting machine with dynamically adjusted spacing between tension rollers according to the present invention;

[0019] Figure 3 This is a schematic diagram of the second internal three-dimensional structure of a circular knitting machine with dynamically adjusted spacing between tension rollers according to the present invention;

[0020] Figure 4 This is a first three-dimensional structural diagram of a winding device and a tensioning device of a circular knitting machine with a dynamically adjusted spacing between tensioning rollers according to the present invention;

[0021] Figure 5 This is a second three-dimensional structural diagram of a winding device and a tensioning device of a circular knitting machine with a dynamically adjusted spacing between tensioning rollers according to the present invention;

[0022] Figure 6 This is a structural diagram of a winding device and a tensioning device of a circular knitting machine with a dynamically adjusted spacing between tensioning rollers according to the utility model;

[0023] Figure 7 This utility model is a circular knitting machine with dynamic adjustment of the spacing between tension rollers. Figure 4 Enlarged structural diagram at point A in the middle.

[0024] The numbers in the figure are: 1. knitting machine body; 2. frame; 21. slide; 3. winding assembly; 31. winding roller; 311. slot; 32. rotating drive member; 321. first clamping disk; 3211. first latch; 33. handle; 331. threaded rod; 332. connecting disk; 333. second clamping disk; 3331. second latch; 4. tensioning assembly; 41. tensioning roller body; 42. adjustment assembly; 421. telescopic drive member; 4211. connecting rod; 4212. moving block; 43. laser emitter; 44. photoelectric sensor. DETAILED DESCRIPTION

[0025] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is described in further detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Reference Figure 1-Figure 7 As shown, the utility model provides a circular knitting machine with dynamically adjusted spacing between tensioning rollers, comprising a circular knitting machine body 1, a frame 2 that can rotate around the center position of the circular knitting machine body 1 is provided at the bottom of the interior of the circular knitting machine body 1, a winding assembly 3 that can be used to wind the textile and a tensioning assembly 4 for tensioning the textile are provided on the frame 2, the winding assembly 3 is arranged at the discharge end of the tensioning assembly 4, the tensioning assembly 4 includes two tensioning roller bodies 41 that are rotatably arranged on the frame 2 and can move synchronously toward or relative to each other, and the tensioning assembly 4 also includes adjustment assemblies 42 distributed on both sides of the frame 2 and capable of driving the tensioning roller body 41 to move synchronously.

[0027] During operation, the circular knitting machine body 1 starts, and the frame 2 begins to rotate around its center, driving the winding assembly 3 and tensioning assembly 4 mounted on the frame 2. At this point, the adjustment assembly 42 transmits power to the two tensioning roller bodies 41, causing them to move synchronously toward or relative to each other, adjusting the distance between them and, in turn, varying the tension applied to the textile.

[0028] Slide grooves 21 are provided on both sides of the frame 2 along the width direction of the frame 2. The adjustment component 42 includes two groups of movable blocks 4212 that can slide in the slide grooves 21 and can be movably connected to the two ends of the tensioning roller body 41. The movable blocks 4212 are connected to the connecting rod 4211 through an axis. The tensioning component 4 also includes a telescopic driving member 421 vertically fixed on the side of the frame 2. The output end of the telescopic driving member 421 is connected to the connecting rod 4211. The tensioning component 4 also includes a detection component that can detect the moving distance of the tensioning roller body 41.

[0029] Provide a power source for the adjustment component 42. The telescopic drive member 421 can be selected from different types such as electric push rods, hydraulic cylinders or pneumatic cylinders. The specific selection needs to be comprehensively considered based on factors such as the power requirements, precision requirements, response speed and working environment of the equipment. The linear telescopic movement of the output end of the telescopic drive member 421 drives the connecting rod 4211 to rotate around the axis, and then drives the moving block 4212 to slide in the slide groove 21 to achieve the movement and adjustment of the tensioning roller body 41. In actual work, the telescopic drive member 421 accurately controls the telescopic amount of the output end according to the instructions issued by the control system (the control system of the large circular knitting machine, not shown in the figure, is the prior art), thereby achieving precise adjustment of the moving distance and position of the tensioning roller body 41.

[0030] The detection component includes a photoelectric sensor 44 installed on the side of the frame 2, and the photoelectric sensor 44 is arranged horizontally on the side of the frame 2. The detection component also includes a laser emitter 43 installed on the moving block 4212. The laser emitter 43 emits laser light that can be received by the photoelectric sensor 44.

[0031] This detection component, based on the principle of laser optical path detection, measures the movement distance of the tension roller body 41 by monitoring the relative position changes between the laser emitter 43 and the photoelectric sensor 44 in real time. When the adjustment component 42 drives the movable block 4212 to slide in the slideway 21, the laser emitter 43 mounted on the movable block 4212 moves synchronously with it and emits a stable laser beam toward the photoelectric sensor 44 mounted on the side of the frame 2. The photoelectric sensor 44 outputs an electrical signal, which calculates the displacement of the laser emitter 43 (i.e., the movable block 4212 and the tension roller body 41) relative to the photoelectric sensor 44. This in turn drives the adjustment component 42 to dynamically correct the position of the tension roller body 41 until the actual displacement matches the target displacement value.

[0032] The winding assembly 3 includes a winding roller 31 rotatably mounted within the frame 2. The winding assembly 3 also includes a drive assembly for driving the winding roller 31 to rotate. The drive assembly comprises a first clamping disc 321 and a second clamping disc 333, each capable of clamping the winding roller 31 from either end. The drive assembly also includes a rotary drive member 32 for rotating the first clamping disc 321. The output end of the rotary drive member 32 is connected to the first clamping disc 321. Slots 311 are located on both sides of the winding roller 31. The first clamping disc 321 is provided with a plurality of first latches 3211, which can be inserted into the latches 311 on one side of the winding roller 31.

[0033] When the rotary driving member 32 is started, the rotational motion of the output end thereof is transmitted to the first clamping disc 321 , thereby driving the winding roller 31 to rotate, thereby winding the textile.

[0034] The second clamping disc 333 is provided with a plurality of second latches 3331, which can be inserted into the slots 311 on the other side of the winding roller 31. The drive assembly also includes a threaded rod 331 disposed on the frame 2. One end of the threaded rod 331 is connected to the handle 33, and the other end of the threaded rod 331 is connected to the connecting disc 332, which is rotatably connected to the second clamping disc 333.

[0035] When installing the winding roller 31, first align one end of the winding roller 31 with the first clamping disc 321 and insert the first latch 3211 into the corresponding slot 311 on one side of the winding roller 31, completing the initial securement of one end of the winding roller 31. The operator rotates the handle 33, causing the threaded rod 331 to rotate. Due to the threaded engagement between the threaded rod 331 and the frame 2, the rotational motion of the threaded rod 331 is converted into axial linear motion, thereby driving the connecting disc 332 and the second clamping disc 333 toward the winding roller 31. The second clamping disc 333 gradually approaches the other end of the winding roller 31. The second latch 3331 is accurately inserted into the slot 311 on the other side of the winding roller 31. At this time, the two ends of the winding roller 31 are reliably clamped by the first clamping disk 321 and the second clamping disk 333 respectively, forming a stable support and connection structure. After the winding is completed, the winding roller 31 needs to be replaced. The operator can adjust the position of the second clamping disk 333 by turning the handle 33 again to loosen the winding roller 31, which is convenient for replacing the winding roller 31.

[0036] The above embodiments merely represent one or several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A circular knitting machine with dynamic adjustment of the spacing between tensioning rollers, characterized in that: The invention comprises a large circular knitting machine body (1), wherein a frame (2) capable of rotating around the center position of the large circular knitting machine body (1) is provided at the bottom of the interior of the large circular knitting machine body (1), a winding assembly (3) capable of winding textiles and a tensioning assembly (4) for tensioning the textiles are provided on the frame (2), the winding assembly (3) is provided at the discharge end of the tensioning assembly (4), the tensioning assembly (4) comprises two tensioning roller bodies (41) rotatably provided on the frame (2) and capable of synchronously moving toward or relative to each other, and the tensioning assembly (4) further comprises an adjusting assembly distributed on both sides of the frame (2) and capable of driving the tensioning roller body (41) to move synchronously. The frame (2) is provided with a sliding groove (21) on both sides thereof along the width direction of the frame (2); the adjusting component (42) includes two groups of moving blocks (4212) capable of sliding in the sliding groove (21) and capable of being movably connected to both ends of the tensioning roller body (41); the moving blocks (4212) are connected to a connecting rod (4211) via an axis; the tensioning component (4) also includes a telescopic driving component (421) vertically fixed to the side of the frame (2); the output end of the telescopic driving component (421) is connected to the connecting rod (4211); the tensioning component (4) also includes a detection component capable of detecting the moving distance of the tensioning roller body (41).

2. The circular knitting machine with dynamic adjustment of the tension roller spacing according to claim 1, characterized in that: The detection component includes a photoelectric sensor (44) installed on the side of the frame (2), and the photoelectric sensor (44) is arranged horizontally on the side of the frame (2). The detection component also includes a laser emitter (43) installed on the moving block (4212), and the laser emitter (43) emits laser light that can be received by the photoelectric sensor (44).

3. The circular knitting machine with dynamic adjustment of the tension roller spacing according to claim 1, characterized in that: The winding assembly (3) includes a winding roller (31) that can be rotatably arranged in the frame (2), and the winding assembly (3) also includes a driving assembly for driving the winding roller (31) to rotate.

4. The circular knitting machine with dynamic adjustment of the tension roller spacing according to claim 3, characterized in that: The driving assembly includes a first clamping disc (321) and a second clamping disc (333) capable of clamping the winding roller (31) from both ends, respectively. The driving assembly also includes a rotating driving member (32) for driving the first clamping disc (321) to rotate, and the output end of the rotating driving member (32) is connected to the first clamping disc (321), and the two side surfaces of the winding roller (31) are also distributed with card slots (311).

5. The circular knitting machine with dynamic adjustment of the spacing between tension rollers according to claim 4, characterized in that: A plurality of first latches (3211) are distributed on the first clamping disc (321), and the first latches (3211) can be inserted into the slots (311) on one side of the winding roller (31).

6. The circular knitting machine with dynamic adjustment of the spacing between tension rollers according to claim 4, characterized in that: A plurality of second latches (3331) are provided on the second clamping disc (333), and the second latches (3331) can be inserted into the slots (311) on the other side of the winding roller (31).

7. The circular knitting machine with dynamic adjustment of the spacing between tension rollers according to claim 4, characterized in that: The drive assembly further comprises a threaded rod (331) arranged on the frame (2), one end of the threaded rod (331) is connected to a handle (33), and the other end of the threaded rod (331) is connected to a connecting disk (332), and the connecting disk (332) is rotatably connected to the second clamping disk (333).

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