High-precision seamless underwear machine

Abstract

The utility model relates to seamless underwear machine technical field, especially a kind of high-precision seamless underwear machine. Including rack, upper output gear, lower output gear, half disc, lower needle cylinder, synchronous transmission assembly, the synchronous transmission assembly includes synchronous shaft, transmission gear;The transmission gear includes center shaft, hub portion, gear ring portion, center shaft is installed on rack by horizontal adjusting mechanism, the center shaft is coaxial with hub portion and rotationally connected, the gear ring portion is set on the outside of hub portion and is fixedly connected, the hub portion is metal material, the gear ring portion is engineering plastics material.This application half disc and lower needle cylinder are engaged by several gear to form synchronous transmission between, synchronous precision is high, guarantee the reliable weaving effect.The gear ring portion of transmission gear and center shaft adopt two kinds of materials, the center shaft of metal material is high in rigidity and strength, gear ring portion adopts engineering plastics, and precision and mute effect are considered.

Description

Technical Field

[0001] This utility model relates to the field of seamless underwear knitting technology, and in particular to a high-precision seamless underwear knitting machine. Background Technology

[0002] A seamless underwear machine is a specialized forming device for producing seamless knitted fabrics. The garments it knits are essentially formed in one pass, requiring only simple cutting to complete the production process. It eliminates the side seams left by traditional sewing, making it widely used in the production of intimate apparel. As consumers' demands for garment patterns increase, new knitting function requirements have emerged for seamless underwear machines. For example, Chinese patent CN215713742U describes a seamless underwear machine with a selectable knitting method using a half-plate mechanism, which enhances knitting functionality through improvements to the half-plate mechanism. Currently, the transmission structure of the half-plate mechanism, lower needle cylinder, and drive unit in existing seamless underwear machines typically uses a synchronous belt connection. Due to the increased complexity of knitting models, the requirements for synchronous transmission between the half-plate mechanism and lower needle cylinder have increased. Existing synchronous belt structures tend to stretch after prolonged use, leading to decreased accuracy and difficulty in meeting knitting demands. Therefore, improvements are needed to meet high-precision transmission requirements. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a high-precision seamless underwear machine with high transmission accuracy and quiet and reliable operation. To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high-precision seamless underwear machine, including a frame, an upper output gear, a lower output gear, a half plate, and a lower needle cylinder. The upper output gear drives the half plate to rotate, and the lower output gear drives the lower needle cylinder to rotate. It also includes a synchronous transmission component, which includes a synchronous shaft and a transmission gear. The synchronous shaft is provided with an upper synchronous gear and a lower synchronous gear at both ends. The upper output gear is connected to the upper synchronous gear through a transmission gear, and the lower output gear is connected to the lower synchronous gear through a transmission gear. The transmission gear includes a central shaft, a hub, and a gear ring. The central shaft is mounted on the frame via a horizontal adjustment mechanism. The central shaft is coaxial with and rotatably connected to the hub. The gear ring is fitted over the hub and fixedly connected. The hub is made of metal, and the gear ring is made of engineering plastic.

[0004] Furthermore, the engineering plastic material is polyoxymethylene.

[0005] Furthermore, the horizontal adjustment mechanism includes a first elongated hole on the frame and positioning members at both ends of the first elongated hole. The positioning members are provided with first bolts extending toward the central axis and having an adjustable extension length. The central axis passes through the first elongated hole and is restricted to move only along the length direction of the first elongated hole. The first bolts of the two positioning members are arranged facing each other, and the central axis is located between the two first bolts and is restricted to position the central axis in the first elongated hole. The position of the central axis in the first elongated hole is adjusted by adjusting the extension length of the two first bolts.

[0006] Furthermore, the horizontal adjustment mechanism includes a swing arm, an elongated guide groove formed in the frame, and a positioning frame located on one side of the frame. The middle part of the swing arm is rotatably connected to the frame. The first section of the swing arm has a second elongated hole, and the second section extends into the positioning frame. The positioning frame has two second bolts with adjustable extension lengths. The two second bolts abut against the second section of the swing arm. The central shaft is placed in the elongated guide groove and passes through the second elongated hole. By adjusting the extension length of the second bolts, the swing angle of the swing arm is changed, thereby adjusting the position of the central shaft in the elongated guide groove.

[0007] Furthermore, within the swing range of the lever, the straight line along the length direction of the second elongated hole intersects with the straight line along the length direction of the elongated guide groove.

[0008] Furthermore, the first and second sections of the swing arm are connected at an obtuse angle, and the junction of the first and second sections is rotatably connected to the frame.

[0009] Furthermore, two transmission gears are provided between the upper output gear and the upper synchronous gear, and the two adjacent transmission gears move in a straight line through a horizontal adjustment mechanism, with the two transmission gears moving in non-parallel directions.

[0010] Furthermore, the central shaft is connected to the hub via bearings.

[0011] Furthermore, the upper output gear, lower output gear, upper synchronizing gear, and lower synchronizing gear are all made of metal.

[0012] Furthermore, it also includes a servo drive, which is used to drive the lower output gear to rotate.

[0013] As can be seen from the above description of this utility model, compared with the prior art, the high-precision seamless underwear machine provided by this utility model has the following advantages: In this application, the half-plate and the lower needle cylinder are synchronously driven by several meshing gears, which has high synchronization accuracy and ensures the precise needle release of the upper and lower needles, thus guaranteeing reliable knitting results.

[0014] The transmission gear position is adjustable, allowing for precise adjustment of the meshing clearance between the teeth to the correct fit, eliminating errors introduced during production and assembly, and further ensuring transmission accuracy. The horizontal adjustment mechanism used in the transmission gear has a simplified structure, high reliability, and is easy to operate.

[0015] The transmission gear's gear ring and central shaft are made of two different materials: the metal central shaft offers high rigidity and strength, while the gear ring is made of engineering plastic, balancing precision and quiet operation. Polyoxymethylene (POM) is the preferred material, offering advantages such as high strength, quiet operation, and self-lubrication, with superior quietness and ease of maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a high-precision seamless underwear machine according to the present invention.

[0017] Figure 2 This utility model Figure 1 A sectional view.

[0018] Figure 3 This is a partial schematic diagram of the present invention.

[0019] Figure 4 This utility model Figure 3 Sectional view along the AA direction.

[0020] Figure 5 This is a partial schematic diagram of the present invention.

[0021] Figure 6 This is a partial schematic diagram of the present invention.

[0022] Figure 7 This is a schematic diagram of the transmission gear structure of this utility model.

[0023] The corresponding markings in the diagram are as follows: 1. Frame; 2. Upper output gear; 3. Lower output gear; 4. Half plate; 5. Lower syringe; 6. Synchronous transmission assembly; 61. Synchronous shaft; 62. Transmission gear; 621. Central shaft; 622. Hub; 623. Gear ring; 63. Upper synchronous gear; 64. Lower synchronous gear; 7. Servo drive; 8. Horizontal adjustment mechanism; 81. First elongated hole; 82. Positioning component; 83. First bolt; 84. Rocker arm; 84a. First section; 84b. Second section; 841. Second elongated hole; 85. Elongated guide groove; 86. Positioning frame; 87. Second bolt. Detailed Implementation

[0024] The present invention will be further described below through specific embodiments.

[0025] Reference Figures 1 to 7As shown, a high-precision seamless underwear machine includes a frame 1, an upper output gear 2, a lower output gear 3, a half-plate 4, a lower needle cylinder 5, a synchronous transmission assembly 6, and a servo drive 7. The upper output gear 2 drives the half-plate 4 to rotate, and the lower output gear 3 drives the lower needle cylinder 5 to rotate. In this embodiment, the servo drive 7 is used to drive the lower output gear 3 to rotate.

[0026] The synchronous transmission assembly 6 includes a synchronous shaft 61 and a transmission gear 62. The synchronous shaft 61 has an upper synchronous gear 63 and a lower synchronous gear 64 at both ends. The upper output gear 2 is connected to the upper synchronous gear 63 via the transmission gear 62, and the lower output gear 3 is connected to the lower synchronous gear 64 via the transmission gear 62. The transmission gear 62 includes a central shaft 621, a hub 622, and a gear ring 623. The central shaft 621 is mounted on the frame 1 via a horizontal adjustment mechanism 8. The central shaft 621 and the hub 622 are coaxial and rotatably connected. The gear ring 623 is fitted over the hub 622 and fixedly connected. The hub 622 is made of metal, and the gear ring 623 is made of engineering plastic. The preferred engineering plastic material is polyoxymethylene (POM), which has advantages such as high strength, quiet operation, and self-lubrication. Through gear engagement, it achieves high-precision transmission while maintaining quiet operation and ease of maintenance. The metal hub 622 is rotatably connected to the metal central shaft 621 via a bearing, and the metal material ensures reliable positioning and sufficient strength.

[0027] The horizontal adjustment mechanism 8 adjusts the position of the transmission gear 62 by adjusting the position of the central shaft 621. This adjustment changes the meshing clearance between transmission gears 62, between transmission gear 62 and the upper output gear 2, between transmission gear 62 and the lower output gear 3, between transmission gear 62 and the upper synchronous gear 63, and between transmission gear 62 and the lower synchronous gear 64, thus eliminating errors introduced during production and assembly and ensuring precise meshing. The horizontal adjustment mechanism 8 in this solution has two structural implementations.

[0028] In the first embodiment, the horizontal adjustment mechanism 8 includes a first elongated hole 81 formed on the frame 1 and positioning members 82 located at both ends of the first elongated hole 81. Each positioning member 82 has a first bolt 83 extending towards the central shaft 621 with an adjustable extension length. The central shaft 621 passes through the first elongated hole 81 and is restricted to moving only along the length of the first elongated hole 81. The first bolts 83 of the two positioning members 82 are arranged facing each other, with the central shaft 621 positioned and restricted between the two bolts 83. The central shaft is positioned in the first elongated hole 81 by the two bolts 83. After adaptively adjusting the extension length of the two bolts 83 and repositioning the central shaft 621, the position of the central shaft 621 in the first elongated hole 81 is adjusted. Preferably, this embodiment uses the transmission gear 62 between the upper output gear 2 and the upper synchronous gear 63. The positioning members 82 and the first bolts 83 are located in the lower space of the upper part of the frame 1, a position with ample operating space, facilitating structural arrangement and adjustment operations.

[0029] In the second embodiment, the horizontal adjustment mechanism 8 includes a swing arm 84, an elongated guide groove 85 formed in the frame 1, and a positioning frame 86 located on one side of the frame 1. The swing arm 84 includes a first segment 84a and a second segment 84b, which are connected at an obtuse angle. The junction of the first segment 84a and the second segment 84b is rotatably connected to the frame 1, that is, the middle part of the swing arm 84 is rotatably connected to the frame 1. The first segment 84a of the swing arm 84 is provided with a second elongated hole 841, and the second segment 84b extends into the positioning frame 86. The positioning frame 86 is provided with two second bolts 87 with adjustable extension lengths. The two second bolts 87 abut against the second segment 84b of the swing arm 84. The central shaft 621 is placed in the elongated guide groove 85 and passes through the second elongated hole 841. By adjusting the extension length of the second bolts 87, the swing angle of the swing arm 84 is changed, thereby adjusting the position of the central shaft 621 in the elongated guide groove 85. Within the swing range of the rocker arm 84, the straight line along the length direction of the second elongated hole 841 intersects the straight line along the length direction of the elongated guide groove 85. The central shaft 621 lies within the intersecting plane of the vertical projections of the elongated guide groove 85 and the second elongated hole 841. The central shaft 621, located within the elongated guide groove 85, is restricted to moving only along the length direction of the elongated guide groove 85. During the swing of the rocker arm 84, the second elongated hole 841 pushes the central shaft 621 to move and adjust its position. Once the rocker arm 84 is positioned, the combined limiting action of the second elongated hole 841 and the elongated guide groove 85 keeps the central shaft 621 stationary. In this embodiment, the transmission gear 62 between the lower output gear 3 and the lower synchronous gear 64 is preferably used. The adjustment position of the second bolt 87 is located on the side, facilitating structural arrangement and adjustment.

[0030] In a preferred embodiment, two transmission gears 62 are provided between the upper output gear 2 and the upper synchronous gear 63, and two transmission gears 62 are provided between the lower output gear 3 and the lower synchronous gear 64. The two adjacent transmission gears 62 move in a straight line direction through the horizontal adjustment mechanism 8, and the movement directions of the two transmission gears 62 are perpendicular. The upper output gear 2, lower output gear 3, upper synchronous gear 63, and lower synchronous gear 64 are made of metal.

[0031] This application features a half-plate 4 with upper needles and a lower needle cylinder 5 with lower needles. Various knitting effects are achieved through the coordinated movement of the upper and lower needles. The transmission between the half-plate 4 and the lower needle cylinder 5 is gear-driven, ensuring high precision and accurate needle release for reliable knitting results. The transmission gear 62 is adjustable, allowing for precise adjustment of the inter-tooth meshing clearance to further ensure transmission accuracy. The gear ring 623 of the transmission gear 62 is made of polyoxymethylene, possessing advantages such as high strength, quiet operation, and self-lubrication, exhibiting excellent quietness and ease of maintenance.

[0032] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be considered as an infringement of the protection scope of the present utility model.

Claims

1. A high-precision seamless underwear machine, comprising a frame, an upper output gear, a lower output gear, a half-plate, and a lower needle cylinder, wherein the upper output gear drives the half-plate to rotate, and the lower output gear drives the lower needle cylinder to rotate, characterized in that: It also includes a synchronous transmission assembly, which includes a synchronous shaft and transmission gears; The synchronous shaft is provided with an upper synchronous gear and a lower synchronous gear at both ends. The upper output gear is connected to the upper synchronous gear through a transmission gear, and the lower output gear is connected to the lower synchronous gear through a transmission gear. The transmission gear includes a central shaft, a hub, and a gear ring. The central shaft is mounted on the frame via a horizontal adjustment mechanism. The central shaft is coaxial with and rotatably connected to the hub. The gear ring is fitted over the hub and fixedly connected. The hub is made of metal, and the gear ring is made of engineering plastic.

2. The high-precision seamless underwear machine according to claim 1, characterized in that: The engineering plastic is made of polyoxymethylene.

3. The high-precision seamless underwear machine according to claim 1, characterized in that: The horizontal adjustment mechanism includes a first elongated hole on the frame and positioning members at both ends of the first elongated hole. Each positioning member has a first bolt extending toward the central axis with an adjustable extension length. The central axis passes through the first elongated hole and is restricted to move only along the length of the first elongated hole. The first bolts of the two positioning members are arranged facing each other, and the central axis is located between and restricted by the two first bolts to position the central axis in the first elongated hole. The position of the central axis in the first elongated hole is adjusted by adjusting the extension length of the two first bolts.

4. The high-precision seamless underwear machine according to claim 1, characterized in that: The horizontal adjustment mechanism includes a swing arm, an elongated guide groove formed in the frame, and a positioning frame located on one side of the frame. The middle part of the swing arm is rotatably connected to the frame. The first section of the swing arm has a second elongated hole, and the second section extends into the positioning frame. The positioning frame has two second bolts with adjustable extension lengths. The two second bolts abut against the second section of the swing arm. The central shaft is placed in the elongated guide groove and passes through the second elongated hole. By adjusting the extension length of the second bolts, the swing angle of the swing arm is changed, thereby adjusting the position of the central shaft in the elongated guide groove.

5. The high-precision seamless underwear machine according to claim 4, characterized in that: Within the swing range of the rocker arm, the straight line along the length direction of the second elongated hole intersects with the straight line along the length direction of the elongated guide groove.

6. The high-precision seamless underwear machine according to claim 4, characterized in that: The first and second sections of the swing arm are connected at an obtuse angle, and the junction of the first and second sections is rotatably connected to the frame.

7. The high-precision seamless underwear machine according to claim 1, characterized in that: Two transmission gears are provided between the upper output gear and the upper synchronous gear, and the two adjacent transmission gears move in a straight line through a horizontal adjustment mechanism. The movement directions of the two transmission gears are not parallel.

8. The high-precision seamless underwear machine according to claim 1, characterized in that: The central shaft is connected to the hub via a bearing.

9. The high-precision seamless underwear machine according to claim 1, characterized in that: The upper output gear, lower output gear, upper synchronizing gear, and lower synchronizing gear are made of metal.

10. A high-precision seamless underwear machine according to claim 1, characterized in that: It also includes a servo drive, which is used to drive the lower output gear to rotate.

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