Split type multi-needle automatic thread trimmer group

Abstract

The utility model relates to clothing machinery, in particular to a split type multi-needle automatic thread trimmer group which comprises a U-shaped bottom plate 1 which half surrounds the left side, the right side and the rear side of a needle plate of a multi-needle machine and is fixedly connected with the needle plate of the multi-needle machine, a left arm plate and a right arm plate are arranged on the left side and the right side of the U-shaped bottom plate respectively, and a left air cylinder and a right air cylinder are fixedly arranged on the left arm plate and the right arm plate respectively. The front end of the left arm plate and the front end of the right arm plate are fixedly connected with a left additional plate and a right additional plate respectively through a screw, the left additional plate and the right additional plate are fixedly connected together through a connecting arm, a U-shaped trimming connecting plate is in sliding fit between the connecting arm and the left additional plate and between the connecting arm and the right additional plate, and embedding grooves are formed in the ends of a left supporting plate and a right supporting plate of the trimming connecting plate respectively. Connecting blocks are fixedly arranged on cylinder rods of the left air cylinder and the right air cylinder respectively, the connecting blocks extend downwards to form clamping pins, and the clamping pins can be inserted into the caulking grooves. According to the design, the cutter group is divided into two parts, and the two parts can be easily separated only by screwing off two screws. Compared with the prior art, the maintenance operation is greatly simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to clothing machinery, concretely is a split type multi-needle automatic thread trimming knife group. BACKGROUND

[0002] In the field of clothing machinery, the multi-needle automatic thread trimming knife group plays a key role in improving the working efficiency and automation degree of the sewing machine. With the continuous development of the garment manufacturing industry, higher requirements for the efficiency and maintainability of production equipment are put forward.

[0003] The existing multi-needle automatic thread trimming knife group, such as the multi-needle automatic thread trimming mechanism disclosed by the applicant before (publication number CN218115819U), has exposed many problems in actual application. When the thread trimming mechanism is installed on the sewing machine, once the customer needs to maintain the sewing machine, due to its integral design, the entire mechanism has to be disassembled. This process involves the disassembly and reinstallation of numerous components, which is extremely cumbersome. Maintenance personnel need to spend a lot of time disassembling and assembling related components, which consumes a lot of labor cost. Moreover, in the production process, timely repair of equipment failure is crucial for production progress, and such a complex disassembly process seriously delays the maintenance time, greatly affects the production progress, reduces the overall maintenance efficiency of the equipment, and causes the production efficiency of the enterprise to be damaged. UTILITY MODEL CONTENTS

[0004] In view of the above defects or one of the defects in the prior art, the utility model aims to provide a split type multi-needle automatic thread trimming knife group through technical improvement and function expansion, and the technical scheme adopted is:

[0005] A split type multi-needle automatic thread trimming knife group, comprising a U-shaped bottom plate 1 that semi-surrounds the left, right and back three sides of a multi-needle machine needle plate and is fixedly connected with the multi-needle machine needle plate, the left and right sides of the U-shaped bottom plate are left and right arm plates, a left cylinder and a right cylinder are respectively fixedly arranged on the left and right arm plates, and different from the prior art, the front ends of the left and right arm plates are respectively fixedly connected with a left additional plate and a right additional plate through a screw, the left and right additional plates are fixedly connected together through a connecting arm, the connecting arm and the left and right additional plates are slidingly connected with a U-shaped thread trimming connecting plate, and the left and right two branches of the thread trimming connecting plate are respectively provided with an embedding groove at the end.

[0006] Further, a sinking groove is respectively arranged on the left and right arm plates, a tenon is respectively formed on the left and right additional plates and extends backward, the tenon is fixedly connected together through the screw after entering the sinking groove, and the tenon and the sinking groove are insertedly connected and limited in the up-down, left-right and front-back directions.

[0007] Further, the front ends of the left and right arm plates and the rear ends of the left and right additional plates form an interlocking structure.

[0008] Further, the slot is a long circular slot with the length direction being left-right direction.

[0009] Further, the left and right additional plates respectively extend inward to form inward extension plates, and the fixed knives are fixed to the two inward extension plates.

[0010] Further, the outer edges of the left and / or right additional plates are respectively provided with stop tables, the height of the stop table is equal to the thickness of the cutting line connecting plate, the inner side surface of the stop table is in sliding fit with the outer side surface of the cutting line connecting plate, the top surface of the stop table is fixed with a pressing plate, and the lower surface of the pressing plate is in sliding fit with the upper surface of the cutting line connecting plate.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. Structure innovation realizes simple separation. By skillfully using the left and right additional plates to build an additional installation bottom plate, the original U-shaped bottom plate and its accessory components are defined as a first main body, and the additional installation bottom plate and related components constitute a second main body. This unique structure design is completely different from the traditional cutting line knife group which needs to be disassembled or complexly split into parts during maintenance. Only two screws need to be unscrewed, and the second main body can be easily separated from the first main body. This process greatly reduces the difficulty of maintenance operation, and ordinary maintenance personnel can quickly start without professional skill training, effectively reducing the operation failure rate of maintenance personnel and further improving the maintenance efficiency.

[0013] 2. Multi-dimensional benefits of simplified maintenance process. The traditional maintenance method may take several hours or even longer to disassemble and assemble the cutting line knife group, while the simple separation method of the utility model can shorten the maintenance time to several minutes, significantly improving the maintainability of the equipment. In the peak season of clothing production, the reduction of equipment downtime means that more products can be produced, creating more economic benefits for enterprises.

[0014] 3. Optimization of labor cost. Because of the simple operation, professional maintenance personnel do not need to participate for a long time, enterprises can reasonably arrange human resources, reduce the dependence on high-skilled maintenance personnel, and reduce the maintenance labor cost. For example, the work that originally required 2 professional maintenance personnel to spend half a day to maintain can now be completed by 1 ordinary maintenance personnel in a short time.

[0015] 4. Production progress is guaranteed. The rapid repair process minimizes the production downtime caused by equipment maintenance, ensures that the garment manufacturing enterprise can smoothly produce according to the order plan, deliver products on time, and enhance the enterprise's credibility and competitiveness in the market.

[0016] 5. The convenient operation mode of the utility model avoids the damage risk to other components caused by excessive disassembly or improper operation. In the traditional maintenance mode, the complex disassembly process may cause scratches, deformation or other damage to the components, while the design of the utility model reduces unnecessary friction and collision between components through simple screw disassembly and main body separation. This helps to maintain the original performance and accuracy of each component of the equipment, prolongs the service life of the equipment, and reduces the failure rate of the equipment. For example, after long-term use, if the thread cutter group fails, the maintenance mode of the utility model can still maintain good running state of the equipment after maintenance, reducing the problem of performance degradation caused by frequent maintenance.

[0017] 6. Excellent versatility helps equipment flexible adaptation. The split design gives the utility model excellent versatility, allowing it to be flexibly installed and accurately adapted to a variety of different models of sewing machines and other types of garment machinery without the need for large-scale, complex and expensive modification projects on the original equipment structure. Simply adjust the installation method of the thread cutter group according to the specific specifications and installation interfaces of different models, and it can be successfully applied to different models of equipment. For example, common industrial sewing machines include several types such as lockstitch machines, overlock machines, flatlock machines, multi-needle machines, etc. Each type contains a large number of different brands and models, and their internal structures and working principles have commonalities but also differences. The utility model, with its split structure, can flexibly adjust the installation position and connection method of each component according to factors such as the spatial layout and transmission method of different models, ensuring stable and efficient thread cutting function on various models. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure diagram of the utility model U-shaped bottom plate, left additional plate and right additional plate is fixed together.

[0019] Figure 2 The structure diagram of the utility model U-shaped bottom plate, left additional plate and right additional plate is fixed together. Figure 1 The structure diagram of the utility model U-shaped bottom plate, left additional plate and right additional plate is fixed together.

[0020] Figure 3 The structure diagram of the utility model U-shaped bottom plate, left additional plate and right additional plate is fixed together. Figure 2 The component separation diagram of the utility model U-shaped bottom plate, left additional plate and right additional plate is fixed together.

[0021] Figure 4 The structure diagram of the utility model U-shaped bottom plate, left additional plate and right additional plate is fixed together.

[0022] Figure 5 The structure diagram of the utility model U-shaped bottom plate, left additional plate and right additional plate is fixed together.Figure 4 Structure schematic view from another perspective.

[0023] Figure 6 Structure schematic view of the utility model after installing and fixing the knife, the cutting line connecting plate and the connecting arm on the left and right additional plates.

[0024] Figure 7 For Figure 6 Structure schematic view from another perspective.

[0025] Figure 8 Structure schematic view of the utility model. DETAILED DESCRIPTION

[0026] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0027] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "communication" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] The embodiments of the utility model will be described below by specific examples, and those skilled in the art can easily understand other advantages and effects of the utility model from the contents disclosed in the specification. Obviously, the described examples are part of the examples of the utility model, not all examples. Based on the examples in the utility model, all other examples obtained by ordinary skilled persons in the art without creative labor belong to the scope of protection of the utility model.

[0029] As Figures 1-8 As shown in the figure, a split type multi-needle automatic cutting line knife group comprises a U-shaped bottom plate 1 which is semi-enclosed on the left, right and back three sides of a multi-needle machine needle plate 100 and is fixedly connected with the multi-needle machine needle plate 100, the left and right sides of the U-shaped bottom plate 1 are a left arm plate 11 and a right arm plate 12, a left air cylinder 13 and a right air cylinder 14 are respectively fixedly arranged on the left arm plate 11 and the right arm plate 12, this part of structure is basically consistent with the prior art, for the convenience, this part can be called the first main body.

[0030] The front ends of the left and right arm plates 11 and 12 are respectively fixed to the left and right additional plates 300 and 400 by one screw 200, the left and right additional plates 300 and 400 are fixed together by a connecting arm 15, the connecting arm 15 is in sliding fit U-shaped shear line connecting plate 8 with the left and right additional plates 300 and 400, the left and right two branch plates of the shear line connecting plate 8 are respectively provided with an embedding groove 81; the connecting block 500 is respectively arranged on the cylinder rod of the left and right gas cylinders 13 and 14, the connecting block 500 downwardly extends to form a bayonet 501, and the bayonet 501 can be inserted into the embedding groove 81. This part of structure is different from the prior art, and for the sake of convenience, this part can be called the second main body.

[0031] The working principle of the embodiment is as follows:

[0032] Initial state preparation

[0033] When the device is not working, each component is in the initial position. The shear line connecting plate 8 is kept stable under the support of the connecting arm 15, at this time the cylinder rod of the gas cylinder is in the retracted state, the bayonet 501 is located in the embedding groove 81 but does not exert force on the shear line connecting plate 8, and the whole knife group is in the standby state, ready to respond to the shear line operation instruction at any time.

[0034] Shear line action triggering and execution

[0035] When the shear line operation is needed, the control system issues an instruction, and the left and right gas cylinders 13 and 14 work at the same time, and the cylinder rod is extended. Due to the close fit of the bayonet 501 and the embedding groove 81, the extension action of the cylinder rod is accurately transmitted to the shear line connecting plate 8 through the connecting block 500, so that it slides along the connecting arm 15. In the sliding process, the shear line connecting plate 8 drives the multiple line hooking knives (not shown in detail in the figure, but necessarily related to the shear line) installed thereon to move according to the predetermined trajectory. Each line hooking knife forms a shear pair with the fixed knife, thereby realizing the shearing operation of the suture. In this process, the sliding fit of the connecting arm 15 and the shear line connecting plate 8 ensures the stability of the movement, effectively avoiding the shear line failure caused by movement jamming or shaking; and the cooperative action of the left and right gas cylinders ensures the accuracy and symmetry of the shear line action, so that each time the shear line is cut at the predetermined position and angle, ensuring the quality of the shear line.

[0036] Shear line completion reset

[0037] After the shear line action is completed, the cylinder rod of the gas cylinder is retracted, driving the shear line connecting plate 8 to slide reversely to the initial position, preparing for the next shear line operation. In the whole process, the connection relationship and cooperation mode between the components ensure the smoothness and repeatability of the action, ensuring that each shear line operation can be completed stably and accurately.

[0038] When the device needs maintenance, the advantages of split design are particularly significant. By simply unscrewing the screws 200 connecting the left arm plate 11 and the left additional plate 300, as well as the right arm plate 12 and the right additional plate 400, the second body can be completely detached from the first body. This allows maintenance personnel to conveniently inspect, repair or replace the shear line connecting plate 8 and its related components. For example, if the shear line connecting plate 8 has problems such as wear or jamming, maintenance personnel can detach the second body and perform detailed inspection and repair on the workbench without disassembling the entire complex knife group, greatly shortening the maintenance time, improving the maintenance efficiency of the device, and reducing the impact of device downtime on production. At the same time, this split design also facilitates the individual upgrading or improvement of the second body to adapt to different production needs or improve the shear line performance, providing more flexibility and convenience for enterprises in device management and optimization.

[0039] In another preferred embodiment, a mortise 112 is formed on the left arm plate 11 and the right arm plate 12, respectively, and a tenon 340 is formed on the left additional plate 300 and the right additional plate 400, respectively, which is inserted into the mortise 112 and fixed together by the screws 200 passing through them. The tenon 340 and the mortise 112 are inserted and matched in the up-down, left-right and front-back directions. The insertion and matching of the tenon and the mortise make the connection between the left additional plate and the right additional plate and the left arm plate and the right arm plate more stable. During the operation of the device, especially during high-speed shear line operation, the knife group will be subjected to a large impact force and vibration force. By limiting the displacement or shaking of the left additional plate and the right additional plate relative to the left arm plate and the right arm plate in the up-down, left-right and front-back directions, the stability of the overall structure of the knife group is ensured, thereby improving the precision and reliability of the shear line. Compared with only screw connection, this connection method can better disperse stress and reduce the risk of connection loosening caused by long-term stress, prolonging the service life of the knife group and reducing the maintenance cost of the device. For example, in long-term continuous production, ordinary screw connection may gradually loosen due to frequent vibration, while tenon and mortise cooperation can greatly enhance the fastening degree of the connection and reduce the occurrence of such situations.

[0040] In another preferred embodiment, the front ends of the left and right arm plates 11 and 12 form an interlocking structure with the rear ends of the left and right additional plates 300 and 400. This interlocking structure further enhances the overall connection integrity between the left and right arm plates and the left and right additional plates. When the knife set is subjected to external forces, such as irregular pulling of the thread during sewing or accidental impact of the equipment, the interlocking parts can restrict each other and prevent the structure from being damaged by external forces, making the knife set more robust and durable. This structural design can improve the adaptability of the knife set to complex working environments and ensure the accuracy and stability of the thread cutting action under various working conditions. For example, when dealing with some fabrics with hard texture or uneven thickness, the sewing machine may generate large vibrations and impact forces, but the interlocking structure can ensure that the knife set is not affected and can stably complete the thread cutting task.

[0041] In another preferred embodiment, the slot 81 is a long circular slot with the long direction being left-right. The design of the long circular slot can also reduce the impact of manufacturing or installation errors on the thread cutting action. Even if there is a certain deviation in the initial fitting of the bayonet and the slot, it can be automatically adjusted through the excess of the long circular slot during movement, improving the fault tolerance and reliability of the knife set.

[0042] In another preferred embodiment, the left and right additional plates 300 and 400 respectively extend inward to form inward extension plates 341, and the fixed knife 2 is fixedly connected to the two inward extension plates 341. By extending the left and right additional plates inward to form inward extension plates to fix the fixed knife, the installation position of the fixed knife is more reasonable and stable. This layout can make the fixed knife and the thread hooking knife (or other movable thread cutting components) on the thread cutting connecting plate form a better spatial cooperation relationship, ensuring that they can work accurately together during thread cutting and improving thread cutting quality. The design of the inward extension plate simplifies the installation structure of the fixed knife, reduces the number of components compared to other complex fixing methods, and reduces installation difficulty and cost. At the same time, it is also convenient for adjusting and maintaining the fixed knife. When the fixed knife needs to be replaced or adjusted, the operator can operate more conveniently, improving the maintainability of the equipment.

[0043] In another preferred embodiment, the outer side edges of the left additional plate 300 and / or the right additional plate 400 are respectively provided with a stop 342, the height of the stop 342 is equal to the thickness of the cutting line connecting plate 8, the inner side surface of the stop 342 is in sliding fit with the outer side surface of the cutting line connecting plate 8, the top surface of the stop 342 is fixedly connected with a pressing plate 18, and the lower surface of the pressing plate 18 is in sliding fit with the upper surface of the cutting line connecting plate 8. The height of the stop is equal to the thickness of the cutting line connecting plate, and the inner side surface of the stop is in sliding fit with the outer side surface of the cutting line connecting plate, thereby providing accurate lateral guidance for the cutting line connecting plate. During the movement of the cutting line connecting plate, the stop can effectively prevent the cutting line connecting plate from deviating in the left-right direction, thereby ensuring the accuracy and straightness of the cutting line operation. The lower surface of the pressing plate is in sliding fit with the upper surface of the cutting line connecting plate, thereby constraining the cutting line connecting plate from above and forming stable support and all-around constraint for the cutting line connecting plate together with the stop. This can not only further improve the stability of the movement of the cutting line connecting plate and reduce vibration and shaking, but also can prevent the cutting line connecting plate from being warped or deformed and other abnormal conditions to a certain extent when subjected to external force (such as thread winding), thereby ensuring the smooth operation of the cutting line and improving the reliability and service life of the knife group.

[0044] The above description is only the preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A split type multi-needle automatic thread trimming cutter set, comprising a U-shaped bottom plate (1) which semi-surrounds the left, right and back three sides of a multi-needle machine needle plate (100) and is fixedly connected with the multi-needle machine needle plate (100), the left and right sides of the U-shaped bottom plate (1) are a left arm plate (11) and a right arm plate (12), a left air cylinder (13) and a right air cylinder (14) are respectively fixedly arranged on the left arm plate (11) and the right arm plate (12), characterized in that, The front end of the left arm plate (11) and the right arm plate (12) is respectively fixed with a left additional plate (300) and a right additional plate (400) through a screw (200), the left additional plate (300) and the right additional plate (400) are fixed together through a connecting arm (15), the connecting arm (15) is in sliding fit U-shaped shear line connecting plate (8) with the left additional plate (300) and the right additional plate (400), the left and right two branch plates of the shear line connecting plate (8) are respectively provided with an embedding groove (81); the cylinder rod of the left cylinder (13) and the right cylinder (14) is respectively provided with a connecting block (500), the connecting block (500) downwardly extends to form a bayonet (501), the bayonet (501) can be inserted into the embedding groove (81).

2. The split multi-needle automatic thread trimming knife assembly of claim 1, wherein, The left arm plate (11) and the right arm plate (12) are respectively provided with a sunken groove (112), the left additional plate (300) and the right additional plate (400) are respectively rearwardly extended to form a tenon (340), the tenon (340) is fixed together through the screw (200) after entering the sunken groove (112), the tenon (340) is in plug-in fit with the sunken groove (112) and is limited in up-down, left-right and front-rear directions.

3. The split multi-needle automatic thread-trimming knife assembly of claim 2, wherein, The front end of the left arm plate (11) and the right arm plate (12) and the rear end of the left additional plate (300) and the right additional plate (400) form an interlaced embedding structure.

4. The split multi-needle automatic thread-trimming knife assembly of claim 1, wherein, The embedding groove (81) is a long circular groove with left-right direction as the longitudinal direction.

5. The split multi-needle automatic thread-trimming knife assembly of claim 1, wherein, The left additional plate (300) and the right additional plate (400) are respectively inwardly extended to form an inwardly extended plate (341), and the fixed cutter (2) is fixed on the two inwardly extended plates (341).

6. The split multi-needle automatic thread-trimming knife assembly of claim 1, wherein, The outer edge of the left additional plate (300) and / or the right additional plate (400) is respectively provided with a stop table (342), the height of the stop table (342) is equal to the thickness of the shear line connecting plate (8), the inner side of the stop table (342) is in sliding fit with the outer side of the shear line connecting plate (8), the top surface of the stop table (342) is fixed with a pressing plate (18), and the lower surface of the pressing plate (18) is in sliding fit with the upper surface of the shear line connecting plate (8).

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