Plastic guide rail rotating shuttle

Abstract

The utility model discloses a plastic guide rail rotating shuttle, which belongs to the technical field of textile machinery and comprises a shuttle race, a guide rail mechanism is arranged on the periphery of the shuttle race, the guide rail mechanism comprises a structural member integrated with the outer wall of the shuttle race and a grinding guide member arranged on the periphery of the structural member, and the structural member and the shuttle race are integrally made of the same material. The grinding guide piece is made of a special plastic material, and the structural piece and the grinding guide piece jointly construct the flat upper surface, the flat lower surface and the flat outer surface of the guide rail mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of textile machinery, in particular to a plastic guide rail rotary hook. Background Art

[0002] The rotary hook is an important core component of a sewing machine or embroidery machine. The life and performance of the rotary hook directly affect the production efficiency of the enterprise and increase the production cost. There are many problems with the rotary hook used in sewing machines. The rotary hook is generally made of steel material, which is not very wear-resistant and durable, and has a short service life. In order to increase the life of the rotary hook, if oil lubrication is used, it is easy to cause oil stains on the finished product when the rotary hook is working, and there will be spots and odors, etc., which increases the cleaning cost of the fabric.

[0003] Since the shuttle frame and the shuttle bed have a compact structure and are easy to disassemble and assemble, the lock frame and the shuttle bed are connected by a guide rail and a limit groove mechanism. The rotation between the shuttle frame and the shuttle bed belongs to a sliding friction structure. When the traditional rotary shuttle is working continuously and at high intensity, a large amount of heat will be generated between the two. Under long-term working conditions, serious heating, wear and noise will occur.

[0004] At the same time, a large amount of fine fibers and dust will be generated when the rotary hook runs at high speed. These fine fibers and dust will adhere to the moving parts, especially accumulate in the lubricating oil. This is not conducive to heat dissipation and will also cause unsmooth operation. When used for a long time, the resistance to equipment operation will be greatly increased due to the large accumulation of fibers and dust, and the working accuracy will also be reduced, making it very easy for the needle or thread to break. In severe cases, the equipment will be stuck and there will be a fire hazard. Utility Model Content

[0005] The utility model aims to provide a plastic guide rail rotary hook, which realizes self-lubrication, wear resistance and durability of the rotary hook by improving the structure of the guide rail of the shuttle bed in the rotary hook, thereby increasing its service life and reducing the replacement and maintenance costs.

[0006] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A plastic guide rail rotary shuttle comprises a shuttle bed, a guide rail mechanism is arranged on the periphery of the shuttle bed, the guide rail mechanism comprises a structural member integrated with the outer wall of the shuttle bed and a wear guide member arranged on the periphery of the structural member, the structural member and the shuttle bed are integrally made of the same material, the wear guide member is a special plastic material, and the structural member and the wear guide member jointly construct the flat upper surface, lower surface and outer surface of the guide rail mechanism.

[0008] Furthermore, the structural member includes a plurality of protrusions, and a plurality of recessed holes are correspondingly arranged on the inner side of the wear guide member. The recessed holes can cooperate with the protrusions and enable the wear guide member to be firmly arranged on the structural member. The wear guide member has an inward upper flange and a lower flange structure, and the recessed holes are arranged at a corresponding position in the middle of the upper flange and the lower flange.

[0009] Furthermore, the lower flange constructs the wear guide into a continuous integral structure.

[0010] Furthermore, the material of the wear guide may be a special plastic that is wear-resistant, durable and self-lubricating, such as polyphenylene ether (PPO / PPE), modified polyphenylene ether (MPPO / MPPE), polyphenylene sulfide (PPS), polyetheretherketone (PEEK) or polyaryletherketone (PAEK).

[0011] Furthermore, the structural member includes a front section, a middle section and a rear section, and the wear guide is correspondingly divided into a first section, a second section and a third section. At the front end and the middle section, the structural member and the wear guide jointly construct a plurality of oblique grooves, and construct a diamond-shaped guide tooth structure between adjacent grooves. In a single guide tooth structure, a protrusion structure is arranged.

[0012] Furthermore, in a single guide tooth structure, the structural member constructs an upper left corner structure, and its exposed structure is a triangular or diamond structure, followed by a wear guide, and the corresponding protrusion is located on one side close to the exposed part of the structural member.

[0013] Furthermore, at the head position of the front section of the guide rail mechanism, the structural part at the upper edge is provided with a first inscribed structure, and at the tail position of the rear section of the guide rail mechanism, the structural part at the upper edge has a second inscribed structure. The first inscribed structure and the second inscribed structure are filled and complemented by the wear guide, and at the tail position of the rear section of the guide rail mechanism, the structural part at the lower edge has a long strip structure.

[0014] Furthermore, a straight hole is arranged at the lower right position of the tail of the rear end portion of the guide rail mechanism, and the outer edge of the straight hole cuts the structural member to form an arc-shaped transition structure. The straight hole is used to accommodate the ceramic wear-resistant part.

[0015] Furthermore, the inner side of the straight hole has a truncated cone structure.

[0016] Compared with the existing technology, this solution has the following advantages:

[0017] The present invention provides a plastic guide rail rotary shuttle, wherein a guide rail mechanism is arranged on a shuttle bed, and the guide rail mechanism is composed of a metal structural member and a wear-resistant self-lubricating wear guide member, wherein one of the structural members is used to maintain the structural coordination with the shuttle frame for rotation, and to ensure the accuracy and stability of the rotation and sewing operation, and the two members are closely integrated with the wear guide member through the interlaced and convex structure; and the wear guide member adopts a new type of wear-resistant self-lubricating special plastic structure that is injection molded as one, and can achieve the functions of lubrication and guidance when the shuttle bed and the shuttle frame rotate, so that the operation of quietness, slight wear, sewage discharge, and air-guiding and heat dissipation is achieved without the need for lubricating oil, thereby improving the service life of the shuttle bed and the shuttle frame and reducing the replacement and maintenance costs;

[0018] In order to increase the service life of the shuttle bed and adapt it to high-intensity continuous work, the structural parts and the wear guide parts jointly construct a plurality of oblique slots and guide tooth structures. The slots are used to guide the airflow and realize the sewage discharge operation, that is, the slotted structure can be used to remove the fine fibers and dust generated when the rotary hook runs at high speed, thereby preventing their accumulation. This scheme has been tested and optimized for many times. First, it ensures the rationality and stability of the operation of the guide rail mechanism, and ensures the stability and durability of the combination of the structural parts and the wear guide parts of the produced rotary hook product. Through the reasonable distribution and arrangement of the structural parts and the wear guide parts, the structural parts can support and guide, while the wear guide parts can lubricate and resist wear, and finally the service life of the rotary hook is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the shuttle bed of the preferred embodiment.

[0020] Figure 2 Schematic diagram of the structural breakdown used for the installation of the shuttle bed.

[0021] Figure 3 This is a top view of the shuttle bed.

[0022] Figure 4 This is a bottom view of the shuttle bed.

[0023] Figure 5 This is a structural diagram of the front end of the guide rail mechanism.

[0024] Figure 6 This is a structural diagram of the rear end of the guide rail mechanism.

[0025] Figure 7 It is a schematic diagram of the structure of the front section and the middle section of the structural member.

[0026] Figure 8 It is a schematic diagram of the rear end structure of the structural member.

[0027] Fig. 9 It is a schematic diagram of the structure of the wear guide.

[0028] Fig.10 This is a schematic diagram of the structure of the wear guide from another angle.

[0029] Fig.11 It is a schematic diagram of the structure of the wear guide from an upward angle. DETAILED DESCRIPTION

[0030] This solution is dedicated to providing a self-lubricating, low-maintenance, and long-life rotary hook, especially by improving and improving the structure of the shuttle bed guide rail to improve the stability of the rotary hook, and by improving the structure of the special plastic material to make it perfectly matched. The applicant continues to think about and improve it, and after multiple versions of optimization and improvement, a well-considered and technically complete rotary hook of this solution is obtained. Figure 1 This is a 1:1 wax model of this solution. With this model, corresponding metal powder injection molding can be carried out, and the blanks of the shuttle bed can be produced in large quantities. This solution has been implemented for large-scale production operations.

[0031] refer to Figures 1 to 11 A plastic guide rail rotary shuttle comprises a shuttle bed 1, a guide rail mechanism 10 is arranged on the periphery of the shuttle bed 1, and the guide rail mechanism 2 is used to cooperate with the installation of the shuttle bed 1 and the shuttle frame 2, wherein the guide rail mechanism 2 is installed in cooperation with the limit groove 20 of the shuttle frame 2, and the two can rotate relative to each other at high speed (in actual sewing or embroidery operation, the shuttle bed 1 is in a relatively fixed state through the mechanism, and the shuttle frame 2 is driven by the rotary shuttle shaft to rotate at high speed, and the rotation cooperates with the up and down movement of the sewing needle to realize high-speed continuous sewing operation). This solution is committed to solving the wear problem between the guide rail mechanism 2 and the limit groove 20 when the traditional rotary shuttle is running at high speed, and improving the resulting problems of short service life of the rotary shuttle, high noise during use, easy accumulation of fibers, and easy contamination of the sewing thread by lubricating oil.

[0032] The guide rail mechanism 10 includes a structural member 11 integrated with the outer wall of the shuttle bed and a wear guide 12 arranged on the periphery of the structural member. The structural member 11 and the shuttle bed 1 are made of the same material, and the wear guide 12 is a special plastic material. The structural member 11 and the wear guide 12 jointly construct the flat upper surface, lower surface and outer surface of the guide rail mechanism 10 to achieve rotational cooperation with the limit groove 20.

[0033] The material of the wear guide 12 can be polyphenylene ether (PPO / PPE), modified polyphenylene ether (MPPO / MPPE), polyphenylene sulfide (PPS), polyetheretherketone (PEEK) or polyaryletherketone (PAEK) and other special plastics with wear resistance, durability and self-lubrication. Among them, polyphenylene ether (PPO / PPE) engineering plastics have excellent dimensional stability, heat resistance, water resistance, low dielectric constant and low dielectric loss. Modified polyphenylene ether (MPPO / MPPE) is a modified product of polyphenylene ether. Since there is no strong polar group in the molecular structure, it has excellent electrical properties, dielectric properties, water resistance, heat resistance, impact resistance, dimensional stability, flame retardancy, mechanical properties, creep resistance, etc. It has higher application advantages than PPO in the fields of electronics, automobiles, photovoltaics, textiles, machinery, etc. Polyphenylene sulfide (PPS) is a thermoplastic resin with phenylthio groups in the main chain of the molecule. Polyphenylene sulfide is a crystalline polymer. PPS is a special engineering plastic with excellent comprehensive performance. PPS has excellent high temperature resistance, corrosion resistance, radiation resistance, flame retardancy, balanced physical and mechanical properties, excellent dimensional stability and excellent electrical properties. It is widely used as a structural polymer material. After filling and modification, it is widely used as a special engineering plastic. At the same time, it can also be made into various functional films, coatings and composite materials, and has been successfully applied in the fields of electronics, aerospace, automobile transportation, etc. Polyetheretherketone (PEEK) is a polymer composed of repeating units containing one ketone bond and two ether bonds in the main chain structure. It is a special polymer material. It has physical and chemical properties such as high temperature resistance and chemical corrosion resistance. It is a type of semi-crystalline polymer material. It can be used as a high temperature resistant structural material and electrical insulation material. It can be composited with glass fiber or carbon fiber to prepare reinforcement materials. Polyaryletherketone (PAEK) has high strength and good flame retardancy. Although it requires a very high melting temperature, it can still be extruded and injection molded on standard processing equipment. This type of thermoplastic, which can withstand higher thermal and mechanical stresses, has many advantages over heat-stable thermosetting plastics or fluoropolymers.

[0034] The structural member 11 includes a plurality of protrusions 13, and a plurality of concave holes 14 are correspondingly arranged on the inner side of the wear guide 12. The concave holes 14 can cooperate with the protrusions 13, so that during the injection molding process, the wear guide 12 can be stably arranged at the structural member 11. A stable and integrated structure of the two is achieved. At the same time, the wear guide 12 has an inward upper flange and a lower flange, and the concave holes 14 are arranged in the middle position of the upper flange and the lower flange, so that the structure is more balanced and stable. The lower flap constructs the wear guide 12 into a continuous integral structure. On the one hand, it can make the injection molding operation more coherent and stable in the injection molding process to prevent the occurrence of fractures. Secondly, it can make the wear guide part 12 have better overall performance, thereby improving the wear resistance and durability.

[0035] The structural member 11 includes a continuous structure of a front section 101, a middle section 102 and a rear section 103, and the wear guide 12 is correspondingly divided into a first section 201, a second section 202 and a third section 203. At the front end 101 and the middle section 102, the structural member 11 and the wear guide 12 jointly construct a plurality of oblique slots 15, and construct a diamond-shaped guide tooth structure 16 between adjacent slots. In a single guide tooth structure 16, the structural member 11 is correspondingly arranged with a convex block 13 structure. In order to improve the stability of the guide rail mechanism 10 during long-term operation, in a single guide tooth structure 16, the structural member 11 constructs an upper left corner structure, and its exposed structure is a triangular or diamond structure, which is connected to the wear guide 12. At the same time, in order to improve the stability of the wear guide 12 during rotation, these triangular or diamond-shaped pointed structures are used for decontamination and dust removal.

[0036] The corresponding protrusion 13 is located on one side close to the exposed part of the structural member 11. Therefore, through such a design, the accuracy of rotation can be guaranteed by the structural member 11 under continuous high-intensity operation, and the self-lubrication, guiding, wear-resistant and silent functions can be achieved through the wear guide 12, and the wear guide 12 can be prevented from being damaged or falling off due to continuous scratching.

[0037] In order to improve the stability of high-speed rotation, at the head position of the front section of the guide rail mechanism 10, the structural member 11 at the upper edge is provided with a first inscribed structure 17, and at the tail position of the rear section of the guide rail mechanism 10, the structural member 10 at the upper edge has a second inscribed structure 18, and the first inscribed structure 17 and the second inscribed structure 18 are filled and complemented by the wear guide 12, and at the tail position of the rear section of the guide rail mechanism 10, the structural member 11 at the lower edge has a long strip structure 19.

[0038] In order to improve the stability of the shuttle bed 1 during high-speed sewing operations and prevent the boss mechanism 10 from being continuously cut by the sewing thread and causing incisions, a straight hole 31 is arranged at the lower right position of the tail of the rear end of the guide rail mechanism 1. The outer edge of the straight hole 31 cuts the structural member 11 and forms an arc-shaped transition structure. The straight hole 31 is used to accommodate a ceramic wear-resistant part 30. The ceramic wear-resistant part 30 is placed at the straight hole 31, and its outer edge is flush with the outer wall of the boss mechanism 10. In order to facilitate the installation and replacement of the ceramic wear-resistant part 30, the inner side of the straight hole 31 has a frustum structure. Therefore, when installing, when force is applied to install the ceramic wear-resistant part 30 to the straight hole 31, it can be prevented from extending too far backward to ensure the accuracy of the installation. At the same time, when replacement is required, it is only necessary to use a tool to poke out the ceramic wear-resistant part 30 on the reverse side of the straight hole 31.

[0039] The present invention also includes a method for processing a plastic guide rail rotary shuttle, which is applied to the above-mentioned plastic guide rail rotary shuttle and includes the following steps:

[0040] The blank of the shuttle bed is formed by metal powder injection molding;

[0041] Deburring, polishing, machining, heat treatment, streamlining, grinding and diamond-like carbon (DLC) coating are performed on the shuttle bed blanks to complete the shuttle bed with precise structural parts;

[0042] The shuttle bed is placed in an injection mold, wherein the mold includes a center piece, a positioning piece, a first-stage mold, a second-stage mold, and a third-stage mold, wherein the center piece is matched with the interior of the shuttle bed and constructs the second-stage inner wall structure of the guide wear part, the first-stage mold is matched with the outer wall of the shuttle bed and constructs the upper wall, lower wall and outer wall structure of the first stage of the guide wear part; the second-stage mold is matched with the outer wall of the shuttle bed and constructs the upper wall, lower wall and outer wall structure of the second stage of the guide wear part; the third-stage mold is matched with the outer wall of the shuttle bed and constructs the upper wall, lower wall and outer wall structure of the third stage of the guide wear part; the first-stage mold, the second-stage mold, and the third-stage mold converge inwardly through the pneumatic structure in the center direction of the shuttle bed, and are sealed with each other, and the upper wall, lower wall and outer wall structure of the guide wear part are seamlessly and completely constructed. At the same time, in the operation of placing the shuttle bed in the injection mold, the positioning piece of the pneumatic structure and the first positioning hole 111 and the second positioning hole 112 of the shuttle bed are used to implement precise positioning operations, and ensure;

[0043] Arrange one or more injection holes on the first section mold, the second section mold or the third section mold, form the wear guide by plastic extrusion injection molding, and make the wear guide closely integrated with the structural parts and the outer wall of the shuttle bed;

[0044] Then, the first section mold, the second section mold and the third section mold are operated to diverge outwards in the center direction of the shuttle bed through the pneumatic structure, and the center piece and the positioning piece are released at the same time, and the shuttle bed after injection molding is taken out;

[0045] After finishing, the outer wall of the wear guide is accurate and smooth, and the finished product processing operation is completed.

[0046] In summary, the present invention provides a plastic guide rail rotary shuttle, wherein a guide rail mechanism is arranged on a shuttle bed, and the guide rail mechanism is composed of a metal structural member and a wear-resistant and self-lubricating wear guide member, wherein one of the structural members is used to maintain the structural coordination with the shuttle frame for rotation, and to ensure the accuracy and stability of the rotation and sewing operations, and the two members are closely integrated with the wear guide member through the interlaced and convex structures; and the wear guide member adopts a new type of wear-resistant and self-lubricating special plastic structure that is injection molded as one, which can achieve the functions of lubrication and guidance when the shuttle bed and the shuttle frame rotate, so that the operation of quietness, slight wear, sewage discharge, and air-guiding and heat dissipation can be achieved without the need for lubricating oil, thereby improving the service life of the shuttle bed and the shuttle frame and reducing the replacement and maintenance costs;

[0047] In order to increase the service life of the shuttle bed and make it adapt to high-intensity continuous work, the structural parts and the wear guide parts jointly construct a plurality of oblique slots and guide tooth structures. The slots are used to guide the airflow and realize the sewage discharge operation, that is, the slot structure can be used to remove the fine fibers and dust generated when the rotary hook runs at high speed, thereby preventing their accumulation. This scheme has been tested and optimized for many times. First, it ensures the rationality and stability of the operation of the guide rail mechanism, and ensures the stability and durability of the combination of the structural parts and the wear guide parts of the finished rotary hook. Through the reasonable distribution and arrangement of the structural parts and the wear guide parts, the structural parts can support and guide, and the wear guide parts can be lubricated and wear-resistant, and finally the service life of the rotary hook is increased;

[0048] The present invention discloses a processing method for a plastic guide rail rotary shuttle, and is particularly concerned with how to perform injection molding operations on a small-sized irregular shuttle bed surface. The present invention adopts a first-stage mold, a second-stage mold, and a third-stage mold for surrounding arrangement, and enables the overall cavity operation of the grinding guide part during the convergence and merging operation, thereby achieving precise and efficient injection molding operations, and ensuring a stable integrated structure of the grinding guide part, the shuttle bed, and the structural part.

Claims

1. A plastic guide rail rotary hook, characterized in that: It comprises a shuttle bed, a guide rail mechanism is arranged on the periphery of the shuttle bed, the guide rail mechanism comprises a structural member integrated with the outer wall of the shuttle bed and a wear guide member arranged on the periphery of the structural member, the structural member and the shuttle bed are made of the same material, the wear guide member is a special plastic material, and the structural member and the wear guide member jointly construct the flat upper surface, lower surface and outer surface of the guide rail mechanism.

2. A plastic guide rail rotary hook according to claim 1, characterized in that: The structural member includes a plurality of protrusions, and a plurality of concave holes are correspondingly arranged on the inner side of the wear guide member. The concave holes can cooperate with the protrusions and enable the wear guide member to be firmly arranged on the structural member. The wear guide member has an inward upper flange and a lower flange structure, and the concave holes are arranged at the corresponding position in the middle of the upper flange and the lower flange.

3. A plastic guide rail rotary hook according to claim 2, characterized in that: The lower flange constructs the wear guide into a continuous integral structure.

4. The plastic guide rail rotary hook according to claim 1, characterized in that: The material of the wear guide can be polyphenylene ether (PPO / PPE), modified polyphenylene ether (MPPO / MPPE), polyphenylene sulfide (PPS), polyetheretherketone (PEEK) or polyaryletherketone (PAEK) which are special plastics with wear resistance, durability and self-lubrication.

5. The plastic guide rail rotary hook according to claim 1, characterized in that: The structural member includes a front section, a middle section and a rear section, and the wear guide member is correspondingly divided into a first section, a second section and a third section. At the front end and the middle section, the structural member and the wear guide member jointly construct a plurality of oblique grooves, and construct a diamond-shaped guide tooth structure between adjacent grooves. In a single guide tooth structure, a protrusion structure is arranged.

6. A plastic guide rail rotary hook according to claim 5, characterized in that: In a single guide tooth structure, the structural member constructs the upper left corner structure, and its exposed structure is a triangular or diamond structure, followed by a wear guide, and the corresponding protrusion is located on one side close to the exposed part of the structural member.

7. The plastic guide rail rotary hook according to claim 1, characterized in that: At the head position of the front section of the guide rail mechanism, the structural part at the upper edge is provided with a first inscribed structure, and at the tail position of the rear section of the guide rail mechanism, the structural part at the upper edge has a second inscribed structure, and the first inscribed structure and the second inscribed structure are filled and complemented by the wear guide, and at the tail position of the rear section of the guide rail mechanism, the structural part at the lower edge has a long strip structure.

8. The plastic guide rail rotary hook according to claim 1, characterized in that: A straight hole is arranged at the lower right position of the tail of the rear end of the guide rail mechanism. The outer edge of the straight hole cuts the structural part and forms an arc-shaped transition structure. The straight hole is used to accommodate the ceramic wear-resistant part.

9. The plastic guide rail rotary hook according to claim 8, characterized in that: The inner side of the straight hole has a truncated cone structure.

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