Leakage-proof device for a circular knitting machine

Abstract

The application discloses an oil leakage prevention device of a circular knitting machine and belongs to the technical field of the circular knitting machine, which comprises a limiting cylinder installed on the circular knitting machine, a flow guide lubricating assembly is arranged on the limiting cylinder, the flow guide lubricating assembly comprises a rotating cylinder arranged in the limiting cylinder, and the rotating cylinder is hollow. A plurality of shunt grooves are arranged outside the shunt sleeve, corresponding needle heads are arranged, the shunt sleeve is connected with the conduit, the lubricating oil is uniformly shunted, the lubricating oil can be accurately delivered to a plurality of lubricating points of the circular knitting machine, and the defect that the traditional device cannot distribute the lubricating oil as required is solved. Meanwhile, the shunt sleeve adopts a circular truncated cone structure, the needle heads are adaptively adjusted in the storage and expansion through the cooperation of the elastic constraint ring and the spring, the needle heads can be stored to avoid pollution when the equipment is stopped or lubrication is not needed, the needle heads can be stably expanded to supply oil when the equipment is running, the lubrication demand under different working conditions is adapted, and the lubrication pertinence and effectiveness are improved.

Description

Technical Field

[0001] This invention relates to the field of circular knitting machine technology, and more specifically, to an oil leakage prevention device for circular knitting machines. Background Technology

[0002] As a core production equipment in the textile industry, circular knitting machines require continuous lubrication of key components such as internal transmission mechanisms and needle cylinders during high-speed operation to reduce frictional wear, extend equipment lifespan, and ensure weaving precision. However, lubricating oil is prone to leakage and uneven distribution during lubrication: on the one hand, excess lubricating oil, if not recovered in time, will drip onto the fabric being woven, causing fabric contamination, increased defect rates, and increased subsequent cleaning and rework costs; on the other hand, traditional lubrication structures often use a single oil circuit supply, making it difficult to accurately distribute lubricating oil to different lubrication points (such as different needle positions, transmission joints, etc.), resulting in insufficient lubrication of some key components, leading to increased wear, increased operating noise, and affecting equipment stability and production efficiency.

[0003] Among them, the patent with announcement number CN214736498U discloses an oil leakage prevention device for a circular knitting machine and a circular knitting machine. The oil leakage prevention device for the circular knitting machine includes an oil return groove and a connecting pipe. The oil return groove is opened on the large disc of the circular knitting machine. The oil return groove has an annular groove structure. Multiple oil return holes are opened in the oil return groove and are evenly arranged along the circumference. The connecting pipe is a hollow structure that runs through the front and back along the axis and includes an insertion section, a sealing section and a connecting section. The insertion section is used to connect the oil return holes, the connecting section is used to connect the external oil drain pipe, and the sealing section is set between the insertion section and the connecting section. The diameter of the sealing section is larger than the inner diameter of the oil return holes.

[0004] When in use, this structure prevents oil leakage from the return oil hole by tightly fitting the upper surface of the sealing section against the lower surface of the large disc around the return oil hole after the insertion section is connected in place. A sealing ring is provided on the upper surface of the sealing section to further enhance the sealing performance. However, it only focuses on the recovery and sealing after oil leakage. Its single return oil structure cannot distribute lubricating oil to multiple different lubrication needles as needed. This leads to concentrated lubricating oil supply, which can easily cause local over-accumulation and local under-supply. This wastes lubricating oil resources and makes it difficult to meet the multi-point and differentiated lubrication needs of circular knitting machines. At the same time, it lacks an adaptive adjustment mechanism for lubrication components and cannot dynamically adjust the lubrication range and supply according to the equipment's operating status, further limiting the synergistic improvement of lubrication effect and leak prevention performance. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an oil leakage prevention device for a circular knitting machine, which aims to solve the problems mentioned in the background art.

[0006] The present invention provides the following technical solution: an oil leakage prevention device for a circular knitting machine, comprising a limiting cylinder installed on the circular knitting machine, wherein a flow guiding lubrication component is provided on the limiting cylinder;

[0007] The flow guiding lubrication assembly includes a rotating cylinder disposed inside a limiting cylinder. The rotating cylinder is hollow and has an inner liner inside. A limiting arc sleeve is disposed at the top of the inner cavity of the inner liner, and a pressure arc sleeve is disposed at the bottom of the limiting arc sleeve.

[0008] The limiting arc sleeve is internally connected to a diversion sleeve, and the top of the diversion sleeve is provided with a conduit for injecting lubricating oil. The diversion sleeve is fixed in the middle of the pressurizing arc sleeve. The limiting arc sleeve guides and limits the displacement stroke of the pressurizing arc sleeve and the conduit, so that the pressurizing arc sleeve and the conduit can move up and down.

[0009] The outer side of the diversion sleeve is provided with several diversion grooves, and each of the diversion grooves is provided with a needle.

[0010] The top of the inner liner is provided with a slip ring, the rotating cylinder is slidably connected to the slip ring, the outer side of the slip ring abuts against the inner wall of the rotating cylinder, and the vertical cross-section of the diverter sleeve is set to a frustum shape. The frustum shape of the diverter sleeve causes the needle to be forcefully retracted into the diverter groove when the diverter sleeve is displaced.

[0011] The bottom of the slip ring is provided with several springs, and the bottom end of each spring is fixed to the top of the inner liner.

[0012] The bottom surface of the diversion sleeve is provided with a groove, and an elastic constraint ring is provided in the groove. The elastic constraint ring is located in the groove and abuts against the needle. The needle is constrained by the elastic constraint ring so that when the needle deflects in the diversion groove, the spring is stressed, and the needle is elastically constrained together by the elastic constraint ring itself.

[0013] Furthermore, the limiting arc sleeve is fixed to the top of the inner cavity of the inner liner, and the pressure arc sleeve is slidably connected to the inner liner. The pressure arc sleeve is adjusted up and down along the guide of the inner liner so that the displacement of the pressure arc sleeve can drive the displacement of the diversion sleeve.

[0014] Furthermore, the slip ring is fixed to the outside of the conduit, so that when the conduit moves downward, it pulls the slip ring to move and compresses the spring, and the spring's own elasticity drives the conduit and the diversion sleeve to reset.

[0015] Furthermore, the bottom two sides of the inner liner are respectively provided with abutment rods, and each abutment rod is fixed to the inner wall of the rotating cylinder.

[0016] Furthermore, a sealing cover is provided at the bottom of the rotating cylinder, a cavity is formed between the limiting cylinder and the rotating cylinder, a docking ring is fixedly provided at the top of the rotating cylinder, a turntable is sleeved on the outside of the docking ring, and a pulley is provided on the outside of the turntable.

[0017] The technical effects and advantages of this invention are as follows:

[0018] This invention achieves uniform distribution of lubricating oil by opening several distribution grooves on the outside of the distribution sleeve and configuring corresponding needles. Combined with the connection design between the distribution sleeve and the guide tube, it can accurately deliver lubricating oil to multiple lubrication points of the circular knitting machine, solving the defect of traditional devices that cannot distribute lubricating oil on demand. At the same time, the distribution sleeve adopts a frustum-shaped structure, and with the synergistic effect of the elastic constraint ring and the spring, it can achieve adaptive adjustment of needle storage and deployment. It can store needles to avoid contamination when the equipment is stopped or when lubrication is not required, and can stably deploy and supply oil during operation, adapting to the lubrication needs under different working conditions and improving the targeting and effectiveness of lubrication.

[0019] This invention achieves bottom sealing protection through a sealing cover at the bottom of the rotating drum, preventing lubricating oil from leaking from the gap between the rotating drums; at the same time, the annular cavity formed between the limiting cylinder and the rotating drum serves as a dedicated oil return channel, which can efficiently collect excess lubricating oil and discharge it for recycling, forming a closed-loop cycle of supply, lubrication and recycling. This not only reduces the waste of lubricating oil, but also eliminates the pollution problem caused by lubricating oil dripping onto the fabric, thereby reducing the production defect rate and subsequent processing costs.

[0020] This invention uses a limiting arc sleeve to guide and limit the pressure arc sleeve and the guide tube, ensuring precise and non-deviation-free displacement during the process; the combination design of slip ring and spring enables automatic reset of the guide tube and the diverting sleeve without the need for an additional drive mechanism, simplifying the structure while ensuring the continuity of lubrication action; the fixed connection between the contact rod and the rotating drum and inner liner ensures that all components operate synchronously when the rotating drum rotates, avoiding wear and oil leakage risks caused by relative displacement, significantly improving the structural stability and service life of the device, and indirectly ensuring the long-term stable operation of the circular knitting machine. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0022] Figure 1 This is a front view of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the limiting cylinder, rotating cylinder, docking ring, pulley, and turntable of the present invention;

[0024] Figure 3This is a schematic diagram of the inner liner, slip ring, guide tube, spring, abutment rod, and sealing cover of the present invention;

[0025] Figure 4 This is a schematic diagram of the slip ring, spring, inner liner, and sealing cover of the present invention;

[0026] Figure 5 This is a schematic diagram of the limiting arc sleeve, pressurizing arc sleeve, conduit, diversion sleeve, and diversion groove of the present invention;

[0027] Figure 6 For the present invention Figure 5 Exploded view.

[0028] The attached diagram is labeled as follows: 1. Limiting cylinder; 2. Rotating cylinder; 3. Inner liner cylinder; 4. Limiting arc sleeve; 5. Pressurizing arc sleeve; 6. Guide tube; 7. Diverting sleeve; 8. Diverting groove; 9. Slip ring; 10. Spring; 11. Abutting rod; 12. Sealing cover; 13. Cavity; 14. Turntable; 15. Connecting ring; 16. Pulley; 17. Needle; 18. Elastic constraint ring. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Example 1

[0030] This embodiment discloses an oil leakage prevention device for a circular knitting machine, which aims to solve the problem that existing oil leakage prevention devices for circular knitting machines are not easy to divert lubrication and cannot accurately divert lubricating oil to different needles.

[0031] Specifically, the oil leakage prevention device of the circular knitting machine includes a limiting cylinder 1 installed on the circular knitting machine. The limiting cylinder 1 is equipped with a flow guiding lubrication component, which realizes the precise distribution and circulation of lubricating oil, and at the same time, it works with a sealing structure to prevent oil leakage.

[0032] The flow guiding lubrication assembly includes a rotating cylinder 2 disposed inside the limiting cylinder 1. The rotating cylinder 2 is a hollow structure. An inner liner cylinder 3 is installed inside the rotating cylinder 2. A limiting arc sleeve 4 is provided at the top of the inner cavity of the inner liner cylinder 3. A pressure arc sleeve 5 is fitted to the bottom of the limiting arc sleeve 4. The pressure arc sleeve 5 is slidably connected to the inner liner cylinder 3 and can be adjusted up and down along the inner wall of the inner liner cylinder 3.

[0033] The limiting arc sleeve 4 is internally connected to a diverting sleeve 7. The top of the diverting sleeve 7 is integrally formed with a conduit 6 for lubricating oil injection. The top of the conduit 6 extends to the top of the rotating cylinder 2, which facilitates the connection of external lubricating oil supply equipment. The diverting sleeve 7 is fixed to the middle of the pressure arc sleeve 5 by welding. The limiting arc sleeve 4 guides and limits the displacement stroke of the pressure arc sleeve 5 and the conduit 6, so that the pressure arc sleeve 5 and the conduit 6 can only move up and down in the vertical direction, avoiding deviation that would affect the lubrication effect.

[0034] like Figure 5 and Figure 6 As shown, the outer side of the diverter sleeve 7 has several evenly distributed diverter grooves 8. Each diverter groove 8 is movably connected to a needle 17 via a rotating shaft. The needle 17 is connected to the interior of the diverter sleeve 7, ensuring that lubricating oil can enter the needle 17 through the diverter sleeve 7 and be accurately dripped into the lubrication part of the circular knitting machine. The vertical cross-section of the diverter sleeve 7 is set to a frustum shape. When the diverter sleeve 7 moves upward, the frustum-shaped side will exert a squeezing force on the inner wall of the limiting arc sleeve 4, thereby causing the needle 17 to be forcefully retracted into the diverter groove 8, realizing the retraction and retraction of the needle 17. When the diverter sleeve 7 moves downward, the squeezing force disappears, and the needle 17 can be unfolded under the action of the subsequent elastic structure.

[0035] A slip ring 9 is fitted on the top of the inner liner 3. The rotating cylinder 2 is slidably connected to the slip ring 9. Several evenly distributed springs 10 are fixedly connected to the bottom of the slip ring 9. The bottom end of each spring 10 is welded and fixed to the top of the inner liner 3. The slip ring 9 is fixed to the outside of the conduit 6 by a clamp. When the conduit 6 is subjected to downward pressure, it will pull the slip ring 9 to move downward synchronously and compress and deform the springs 10. When the pressure is removed, the springs 10 will drive the conduit 6 and the diversion sleeve 7 to return to their original position by their own elastic restoring force, thus realizing the automatic reset function.

[0036] like Figure 3 and Figure 6 As shown, an annular groove is formed on the bottom surface of the diversion sleeve 7, and an elastic constraint ring 18 is engaged in the groove. The elastic constraint ring 18 is made of rubber and has good elasticity and constraint performance. The elastic constraint ring 18 is located in the groove and abuts against the needle 17. When the needle 17 deflects in the diversion groove 8, the elastic constraint ring 18 will generate an elastic constraint force on the needle 17, and at the same time, the spring 10 will be deformed by force. The elasticity of the elastic constraint ring 18 itself will bind the needle 17 together, ensuring the stability and consistency of the needle 17 when it is unfolded.

[0037] Abutment rods 11 are welded to both sides of the bottom of the inner liner 3. Each abutment rod 11 is vertically fixed to the inner wall of the rotating drum 2. The abutment rods 11 achieve a fixed connection between the inner liner 3 and the rotating drum 2, ensuring that the inner liner 3 can rotate synchronously when the rotating drum 2 rotates, thus ensuring the synchronicity of the lubrication operation.

[0038] like Figure 1 and Figure 2As shown, a sealing cover 12 is threadedly connected to the bottom of the rotating drum 2. The sealing cover 12 is made of corrosion-resistant metal and serves as a seal to prevent lubricating oil from leaking from the bottom of the rotating drum 2. An annular cavity 13 is formed between the limiting cylinder 1 and the rotating drum 2. This cavity 13 can serve as an oil return channel to collect excess lubricating oil and discharge it for recycling, further improving the oil leakage prevention effect. A docking ring 15 is welded and fixed to the top of the rotating drum 2. A turntable 14 is sleeved on the outside of the docking ring 15. The turntable 14 is fixedly connected to the docking ring 15 by bolts. A pulley 16 is integrally formed on the outside of the turntable 14. The pulley 16 is used to connect with the drive mechanism of the circular knitting machine to realize the power transmission of the rotating drum 2.

[0039] The specific working principle is as follows: When the device is installed, the limiting cylinder 1 is fixedly installed on the circular knitting machine. The limiting cylinder 1 is the installation support surface. It is connected to the drive mechanism of the circular knitting machine through the pulley 16 to ensure that the rotating drum 2 can rotate synchronously with the drive mechanism. The top end of the conduit 6 is connected to the external lubricating oil supply equipment to provide continuous lubricating oil to the device.

[0040] During lubrication, the external drive mechanism drives the turntable 14, docking ring 15, and rotating drum 2 to rotate synchronously via pulley 16. The rotating drum 2 drives the inner liner 3 and the internal flow-guiding lubrication components to rotate together, forming a circular sweeping trajectory, which is equivalent to making a circular motion around the lubrication target. This can evenly drip lubricating oil to each circularly distributed lubrication point, avoiding the defects of traditional static oil supply where some parts can absorb oil and others cannot. At the same time, the external lubricating oil supply equipment injects lubricating oil into the distribution sleeve 7 through the conduit 6. After the lubricating oil is distributed in the distribution sleeve 7, it enters the needles 17 in each distribution groove 8. The flow-guiding lubrication components rotate synchronously with the equipment drive mechanism, which means that the lubrication action and the equipment operation status are completely coordinated: when the equipment is rotating, the lubrication components supply oil synchronously; when the equipment stops, the lubrication components also stop. This avoids ineffective oil supply when the equipment is stationary, which would cause waste, and also avoids dry friction of parts due to delayed oil supply when the equipment is running, thus achieving dynamic lubrication on demand.

[0041] When the needle 17 needs to be unfolded for lubrication, press the guide tube 6 down. The guide tube 6 drives the pressure arc sleeve 5 and the diversion sleeve 7 to move downward. At this time, the spring 10 is compressed, the squeezing force between the diversion sleeve 7 and the inner wall of the limiting arc sleeve 4 disappears, and the constraint effect of the elastic constraint ring 18 is slightly relaxed.

[0042] In the stowed state, the elastic constraint ring 18 is in a tightened state, slightly tightening the bottom of the needle 17. Combined with the squeezing force of the diverter sleeve 7 and the limiting arc sleeve 4, it ensures stable stowage of the needle. When the diverter sleeve 7 moves downward and the squeezing constraint is removed, the tightening force of the elastic constraint ring 18 will be slightly relaxed but will not completely fail: on the one hand, the relaxed elastic force no longer restricts the deflection of the needle 17, avoiding obstruction of unfolding; on the other hand, the elastic recovery characteristic of the elastic constraint ring 18 will generate a slight outward expansion force, assisting the needle 17 to get rid of the restriction of the diverter groove 8, while ensuring that the unfolding angle of multiple needles 17 is consistent. The elastic constraint ring 18 slightly relaxes from the tightened state, and the elastic recovery force assists the needle 17 to unfold outward, while ensuring that the unfolding angle of multiple needles 17 is consistent, unfolding in an outward radial shape, accurately dripping lubricating oil to each lubrication part of the circular knitting machine.

[0043] When lubrication is not needed or the needle 17 needs to be stored, the pressure on the catheter 6 is released. The spring 10 drives the catheter 6, the diversion sleeve 7 and the pressure arc sleeve 5 to return to their original position by its own elastic restoring force. During the upward displacement of the diversion sleeve 7, its frustum-shaped side surface is squeezed against the inner wall of the limiting arc sleeve 4, thereby storing the needle 17 in the diversion groove 8 to avoid the needle 17 being exposed and causing interference or contamination.

[0044] During the lubrication process, excess lubricating oil will flow into the cavity 13 between the limiting cylinder 1 and the rotating cylinder 2, and be discharged and recycled through the oil return port at the bottom of the cavity 13. The sealing cover 12 effectively prevents lubricating oil from leaking from the bottom of the rotating cylinder 2, thereby achieving a highly efficient oil leakage prevention function.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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.

Claims

1. An oil leakage prevention device for a circular knitting machine, comprising a limiting cylinder (1) installed on the circular knitting machine, characterized in that: The limiting cylinder (1) is provided with a flow guiding lubrication assembly; The flow guiding lubrication assembly includes a rotating cylinder (2) disposed inside a limiting cylinder (1). The rotating cylinder (2) is hollow. An inner liner cylinder (3) is disposed inside the rotating cylinder (2). A limiting arc sleeve (4) is disposed at the top of the inner cavity of the inner liner cylinder (3). A pressure arc sleeve (5) is disposed at the bottom of the limiting arc sleeve (4). The limiting arc sleeve (4) is internally connected to a diversion sleeve (7). The top of the diversion sleeve (7) is provided with a conduit (6) for lubricating oil injection. The diversion sleeve (7) is fixed in the middle of the pressurizing arc sleeve (5). The limiting arc sleeve (4) guides and limits the displacement stroke of the pressurizing arc sleeve (5) and the conduit (6), so that the pressurizing arc sleeve (5) and the conduit (6) can move up and down. The outer side of the diversion sleeve (7) is provided with a plurality of diversion grooves (8), and each of the diversion grooves (8) is provided with a needle (17). The top of the inner liner (3) is provided with a slip ring (9), the rotating cylinder (2) is slidably connected to the slip ring (9), the outer side of the slip ring (9) abuts against the inner wall of the rotating cylinder (2), and the vertical cross-section of the diversion sleeve (7) is set as a frustum shape. When the diversion sleeve (7) is displaced by the frustum shape of the diversion sleeve (7), the needle (17) is forcefully retracted into the diversion groove (8); The bottom of the slip ring (9) is provided with several springs (10), and the bottom end of each spring (10) is fixed to the top of the inner liner (3); The bottom surface of the diversion sleeve (7) is provided with a groove, and an elastic constraint ring (18) is provided in the groove. The elastic constraint ring (18) is located in the groove and abuts against the needle (17). The needle (17) is constrained by the elastic constraint ring (18) so that when the needle (17) deflects in the diversion groove (8), the spring (10) is subjected to force, so that the needle (17) is elastically constrained together by the elastic constraint ring (18) itself.

2. The oil leakage prevention device for a circular knitting machine according to claim 1, characterized in that: The limiting arc sleeve (4) is fixed at the top of the inner cavity of the inner liner (3), and the pressure arc sleeve (5) is slidably connected to the inner liner (3). The pressure arc sleeve (5) is adjusted up and down along the guide of the inner liner (3) so that the displacement of the pressure arc sleeve (5) can drive the displacement of the diversion sleeve (7).

3. The oil leakage prevention device for a circular knitting machine according to claim 1, characterized in that: The slip ring (9) is fixed on the outside of the conduit (6). When the conduit (6) moves downward, it pulls the slip ring (9) to move and compresses the spring (10). The spring (10) itself drives the conduit (6) and the diversion sleeve (7) to reset.

4. The oil leakage prevention device for a circular knitting machine according to claim 1, characterized in that: The bottom sides of the inner liner (3) are respectively provided with abutment rods (11), and each abutment rod (11) is fixed on the inner wall of the rotating cylinder (2).

5. The oil leakage prevention device for a circular knitting machine according to claim 1, characterized in that: The bottom of the rotating cylinder (2) is provided with a sealing cover (12), and a cavity (13) is formed between the limiting cylinder (1) and the rotating cylinder (2). A docking ring (15) is fixedly provided at the top of the rotating cylinder (2), and a turntable (14) is sleeved on the outside of the docking ring (15). A pulley (16) is provided on the outside of the turntable (14).

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