Rocker arm transmission device of small-angle side sewing machine

Abstract

A rocker arm transmission device of a small-angle side sewing machine comprises an arm body unit which is provided with a vertical rocker arm body, an oblique arm body, a rocker arm head and a rocker arm cover, the vertical rocker arm body is rotationally supported through a rocker arm fixing sleeve, and the oblique arm body is connected with the vertical rocker arm body; the synchronous belt wheel power unit is arranged in an inner cavity of the vertical rocker arm body, and a driven wheel piece drives the shuttle support transmission unit; the gear positioning unit is arranged in the vertical rocker arm body; the shuttle support transmission unit comprises a shuttle support ball head transmission shaft, a shuttle support transmission gear piece and a transition gear; the needle plate transmission unit comprises a needle plate ball head transmission shaft and a needle plate transmission gear piece, and the needle plate ball head transmission shaft is connected with the gear positioning unit; the shuttle support piece is mounted between the rocker arm cover and the rocker arm head; and the shuttle assembly comprises an inner side shuttle and an outer side shuttle which are respectively matched with the needle plate transmission gear piece and the shuttle support piece. The utility model has the advantages that the design of the arm body unit is optimized, the sewing requirements of high-upper shoe products are met, and the working efficiency is improved; a gear meshing transmission mode is innovated, and transmission stability and reliability are improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of bag sewing equipment, specifically relating to a rocker arm transmission device for a small-angle side sewing machine. Background Technology

[0002] The side-sewing machine is a core piece of equipment in the footwear industry, mainly composed of three parts: the sewing head, the base, and the rocker arm. The rocker arm's movement, in conjunction with the needles on the sewing head system, completes the stitching of the shoe upper and sole. Specifically, the sewing head system, the core power unit of the side-sewing machine, includes four types of cooperating mechanisms: a needle-piercing mechanism that drives the needle to move vertically and penetrates multiple layers of fabric (such as leather and canvas); a hook-and-loop structure that uses a shuttle assembly to work with the needle to form a thread loop and complete a double-thread lockstitch; and a mechanism that dynamically adjusts the tension of the top thread. The base supports the sewing head system and serves as a working platform, making it suitable for fixed production lines. The rocker arm system includes a connecting part that is fixed to the base by bolts or bushings, transmits power, and supports the overall structure, as well as a working component that houses the rotary hook assembly, needle plate, and transmission gear set, serving as the core of the sewing action. Traditional side-sewing machines typically have a rocker arm angled at approximately 30° to the horizontal, a design suitable for sewing low-top shoes such as casual shoes and athletic shoes. However, for footwear with deep openings and high uppers, such as high-top snow boots, an excessively large rocker arm angle restricts operating space, making placement difficult and requiring frequent adjustments to the workpiece position during sewing, severely impacting production efficiency. Furthermore, existing side-sewing machines rely heavily on synchronous belts (such as a combination of a ring-shaped synchronous pulley and a synchronous belt) for power transmission to the needle plate within the rocker arm. When thread jamming or rocker arm movement occurs during sewing, the transmission belt is prone to breakage due to instantaneous overload, leading to machine downtime for maintenance. While some improvements use chains to replace transmission belts to enhance structural strength, the large meshing gap of chains easily causes vibration and delay during transmission. The needle plate wobbles as the rocker arm swings, causing misalignment between the needle and the rotary hook, resulting in skipped stitches, broken needles, and tangled stitches. In addition, the inertia of chain transmission exacerbates unexpected bobbin rotation; after machine shutdown, the bobbin continues to move due to inertia, causing the bobbin thread to become entangled or break.

[0003] With the market growth of products such as high-top snow boots, there is an urgent need for a side-sewing machine rocker arm transmission device that balances operability, ease of sewing high-top footwear, transmission reliability, and precise vibration resistance. Existing improvements to side-sewing machines by bag sewing manufacturers focus on localized optimizations, but have not systematically addressed the coordination issue between the rocker arm angle and the transmission structure, especially lacking an efficient and stable sewing solution specifically for high-top footwear. Therefore, the applicant has developed a beneficial design, and the technical solution described below arose from this context. Utility Model Content

[0004] The objective of this invention is to provide a high-strength, durable, simple and compact, reliable and safe rocker arm transmission device for small-angle side-sewing machines. This device helps to effectively meet the sewing needs and work efficiency of high-top shoes by reconstructing the tilt angle of the inclined arm body. It also helps to effectively ensure operational stability and transmission accuracy by adopting a multi-stage gear meshing transmission mode.

[0005] The present invention achieves its objective as follows: a rocker arm transmission device for a small-angle side-sewing machine, comprising: an arm unit, the arm unit including a vertical rocker arm body, an inclined arm body connected to the vertical rocker arm body, a rocker arm head fitted on the inclined arm body, and a rocker arm cover installed at the end of the rocker arm head away from the inclined arm body; the vertical rocker arm body is mounted on a rocker arm fixing sleeve and is rotatable relative to the rocker arm fixing sleeve; a synchronous belt pulley power unit, the synchronous belt pulley power unit being disposed in the inner cavity of the vertical rocker arm body, comprising a driving wheel, a driven wheel, and a synchronous belt connecting the two; a driven wheel universal joint being connected to the driven wheel; a gear positioning unit, the gear positioning unit being positioned and installed in the vertical rocker arm body; and a shuttle drive unit, the shuttle drive unit including a shuttle ball head drive shaft passing through the inclined arm body and the rocker arm head, a shuttle drive gear rotatably connected to the ball head end of the shuttle ball head drive shaft, and a shuttle drive gear... The system includes a transition gear for meshing with the gear components; the other end of the shuttle ball head drive shaft is connected to the universal joint of the driven gear component; and one end of the shuttle drive gear component is rotatably engaged with the rocker arm cover. A needle plate drive unit includes a needle plate ball head drive shaft and a needle plate drive gear component rotatably connected to the ball head end of the needle plate ball head drive shaft. The needle plate ball head drive shaft passes through the inclined arm body and through the rocker arm head, with one end away from the ball head end rotatably connected to the gear positioning unit. A shuttle component is installed between the rocker arm cover and the rocker arm head, and this shuttle component is meshed with the transition gear of the shuttle drive unit. A shuttle assembly includes an inner shuttle and an outer shuttle. The outer shuttle is fitted between the shuttle component and the rocker arm cover, while the inner shuttle is installed between the shuttle component and the rocker arm head and is meshed with the needle plate drive gear component.

[0006] In a specific embodiment of this utility model, the inclined arm is tilted at 5° to 25° relative to the horizontal direction; a vertical rocker arm connecting section is formed on the side surface of the vertical rocker arm facing the inclined arm, the vertical rocker arm connecting section is located at the middle position in the height direction of the vertical rocker arm and is tilted to the horizontal direction; one end of the inclined arm in the length direction is fixed to the vertical rocker arm connecting section, thereby realizing the fixed connection between the inclined arm and the vertical rocker arm.

[0007] In another specific embodiment of this utility model, a rocker arm pivot sleeve is fixedly mounted on the vertical rocker arm body. A rocker arm pivot sleeve through hole is formed in the rocker arm pivot sleeve, and an angular contact bearing is fitted in the rocker arm pivot sleeve through hole. The rocker arm fixing sleeve includes a rocker arm fixing sleeve connecting plate, a rocker arm fixing sleeve boss, and a rocker arm fixing sleeve positioning shaft arranged coaxially. The rocker arm fixing sleeve connecting plate is fixed to the side sewing machine body, thereby fixing the rocker arm fixing sleeve body. The rocker arm fixing sleeve boss is located on one side of the rocker arm fixing sleeve connecting plate, and the rocker arm fixing sleeve positioning shaft is located on the side of the rocker arm fixing sleeve boss opposite to the rocker arm fixing sleeve connecting plate. The rocker arm fixing sleeve positioning shaft passes through the rocker arm pivot sleeve through hole and rotates with the angular contact bearing, thereby enabling the rocker arm pivot sleeve to reciprocate on the rocker arm fixing sleeve to achieve a rotational connection between the vertical rocker arm body and the rocker arm fixing sleeve.

[0008] In another specific embodiment of this utility model, a vertical rocker arm central shaft is also fixedly installed on the vertical rocker arm body. The vertical rocker arm central shaft passes through the rocker arm pivot sleeve and the rocker arm fixing sleeve in sequence and protrudes outward from the rocker arm fixing sleeve. The drive wheel is fitted on the vertical rocker arm central shaft, thereby achieving its own positioning.

[0009] In another specific embodiment of this utility model, the gear positioning unit includes a positioning gear, a planetary gear meshing with the positioning gear, a positioning universal joint rotatably connected to the planetary gear, and a planetary gear positioning bracket; wherein, the positioning gear is sleeved on the rocker arm fixing sleeve boss and can rotate thereon, while the planetary gear is disposed below the positioning gear and placed in the gear positioning bracket, and the planetary gear includes a planetary gear gear portion coaxially arranged, a planetary gear positioning shaft and a planetary gear connecting section, the planetary gear gear portion extending upward beyond the gear positioning bracket. The planetary gear positioning bracket meshes with the circumferential gear segment of the positioning gear component. The planetary gear positioning bracket is fixedly mounted on the vertical rocker arm body, and a planetary gear positioning bracket cover plate is also installed on the planetary gear positioning bracket. The planetary gear positioning shaft passes through the planetary gear positioning bracket cover plate and rotates with it. The planetary gear connecting section protrudes outward from the planetary gear positioning bracket, and the positioning universal joint is rotatably connected to the planetary gear connecting section through a pin. The end of the needle plate ball head drive shaft of the needle plate transmission unit that is away from the ball head end in the length direction is fitted into the positioning universal joint and installed together with it.

[0010] In another specific embodiment of this utility model, the driven wheel of the synchronous belt pulley power unit includes a driven wheel gear segment, a driven wheel positioning shaft and a driven wheel connecting shaft formed on both sides of the driven wheel gear segment; and the synchronous belt pulley power unit further includes a driven wheel bracket fixedly installed in the cavity of the vertical rocker arm body, the driven wheel positioning shaft of the driven wheel passes through the driven wheel bracket and achieves rotational engagement with the driven wheel bracket through a driven wheel bearing to achieve positioning of the driven wheel, the driven wheel gear segment is meshed and rotatably connected to the synchronous belt, and the driven wheel universal joint is rotatably connected to the driven wheel connecting shaft.

[0011] In a further specific embodiment of this utility model, the shuttle transmission gear component of the shuttle transmission unit includes a shuttle transmission gear segment, a shuttle transmission gear connecting sleeve, and a shuttle transmission gear positioning shaft coaxially arranged. The shuttle transmission gear segment meshes with the circumferential gear portion of the transition gear for transmission. The shuttle transmission gear connecting sleeve is located on one side of the shuttle transmission gear segment and is rotatably sleeved on the ball end of the shuttle ball head transmission shaft, thereby realizing the rotational connection between the shuttle transmission gear component and the shuttle ball head transmission shaft.

[0012] In a further specific embodiment of this utility model, a rocker arm cover pad is fixedly installed on the side surface of the rocker arm cover facing the inclined arm body, and a shuttle drive gear bearing is installed at the lower part of the rocker arm cover. The shuttle drive gear positioning shaft of the shuttle drive gear passes through the shuttle drive gear bearing and cooperates with it, thereby realizing the positioning of the shuttle drive gear.

[0013] In another specific embodiment of this utility model, the needle plate transmission gear component of the needle plate transmission unit includes a needle plate transmission gear component gear portion and a needle plate transmission gear component connecting sleeve disposed on one side of the needle plate transmission gear component gear portion; wherein, the needle plate transmission gear component gear portion is connected to the inner shuttle of the shuttle assembly through gear meshing transmission, and the needle plate transmission gear component connecting sleeve is rotatably mounted on the ball end of the needle plate ball head transmission shaft, thereby realizing the rotational connection between the needle plate transmission gear component and the needle plate ball head transmission shaft.

[0014] In yet another specific embodiment of this utility model, the shuttle assembly further includes a needle plate, which is positioned above the shuttle support, the inner shuttle, and the outer shuttle, and the needle plate is fixedly connected to the inner shuttle and the outer shuttle by fasteners.

[0015] The beneficial effects of this utility model are as follows: First, through mechanical structural innovation, a breakthrough in both ease of operation and transmission precision is achieved without the need for an additional electronic control system. By optimizing the inclined arm unit structure, the angle of the inclined arm body is reduced to below 30° (preferably within the range of 5° to 25°), thereby forming a low-angle support structure. This allows the space at the head of the rocker arm to be closer to the vertical plane of the shoe upper, effectively reducing the torsional resistance when the boot shaft is fitted. This meets the sewing needs of high-top shoes such as snow boots and hiking boots, as well as curved surfaces in bags, significantly improving the fit and efficiency of high-top shoe sewing. Second, it addresses the limitations of traditional chain transmission... Addressing the drawbacks of large backlash and easy belt breakage, this technical solution replaces flexible transmission with multi-stage gear meshing, achieving an improvement in the all-gear transmission system. This ensures operational stability, with tight gear meshing preventing needle plate wobbling during operation and effectively eliminating accumulated transmission backlash errors. It also effectively controls the displacement fluctuation of the needle plate during rocker arm swing, fundamentally solving the needle breakage problem caused by needle plate wobbling. At the same time, the gear transmission significantly enhances anti-thread jamming capability, maintaining continuous operation even under sewing material thread bite conditions, avoiding downtime caused by traditional belt breakage, ensuring reliability, and further reducing maintenance costs. Attached Figure Description

[0016] Figure 1 This is a planar sectional view of the overall structure of this utility model;

[0017] Figure 2 This is an exploded view of the structure of this utility model;

[0018] Figure 3 This is an example diagram illustrating the application of this utility model.

[0019] In the diagram: 1. Arm body unit; 11. Vertical rocker arm body; 111. Vertical rocker arm body connecting section; 112. Rocker arm pivot sleeve; 1121. Rocker arm pivot sleeve through hole; 1122. Angular contact bearing; 113. Vertical rocker arm body central shaft; 12. Slanted arm body; 13. Rocker arm head; 14. Rocker arm cover; 141. Rocker arm cover pad; 142. Shuttle transmission gear bearing; 15. Rocker arm fixing sleeve; 151. Rocker arm. 1. Fixed sleeve connecting plate; 152. Rocker arm fixed sleeve boss; 153. Rocker arm fixed sleeve positioning shaft; 2. Synchronous belt pulley power unit; 21. Driving pulley; 22. Driven pulley; 221. Driven pulley gear segment; 222. Driven pulley positioning shaft; 223. Driven pulley connecting shaft; 224. Driven pulley bearing; 23. Synchronous belt; 24. Driven pulley universal joint; 25. Driven pulley bracket; 3. Gear 4. Positioning unit, 31. Positioning gear component, 32. Planetary gear component, 321. Planetary gear component gear section, 322. Planetary gear component positioning shaft, 323. Planetary gear component connecting section, 33. Positioning universal joint, 34. Planetary gear component positioning bracket, 341. Planetary gear component positioning bracket cover plate; 5. Shuttle drive unit, 41. Shuttle ball head drive shaft, 42. Shuttle drive gear component, 421. Shuttle drive gear component gear section, 422. Shuttle drive gear component connecting sleeve, 423. Shuttle drive gear component positioning shaft, 43. Transition gear; 6. Needle plate drive unit, 51. Needle plate ball head drive shaft, 52. Needle plate drive gear component, 521. Needle plate drive gear component gear section, 522. Needle plate drive gear component connecting sleeve; 7. Shuttle component; 8. Shuttle assembly, 71. Inner shuttle, 72. Outer shuttle, 73. Needle plate. Detailed Implementation

[0020] The following will provide a detailed description by way of embodiments. However, the description of the embodiments is not intended to limit the present utility model. Any formal but not substantive equivalent transformations made based on the present utility model concept should be considered within the scope of the present utility model's technical solution.

[0021] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back refer to the current situation. Figure 1 The description pertains to the location and state of the object, and therefore should not be construed as a specific limitation on the technical solution provided by this utility model.

[0022] Please see Figures 1 to 3This invention discloses a rocker arm transmission device for a small-angle side-sewing machine, comprising: an arm unit 1, wherein the arm unit 1 includes a vertical rocker arm 11, an inclined arm 12 connected to the vertical rocker arm 11, a rocker arm head 13 fitted on the inclined arm 12, and a rocker arm cover 14 installed on the end of the rocker arm head 13 away from the inclined arm 12. The inclined arm 12 is preferably inclined at 5° to 25° relative to the horizontal direction. The vertical rocker arm 11 is mounted on a rocker arm fixing sleeve 15 and can rotate relative to the rocker arm fixing sleeve 15. The vertical rocker arm 11 can drive the inclined arm 12 to perform multi-directional rotation angle adjustment at the rocker arm head 13, thereby supporting multi-angle adjustment of the workpiece outside the direction of the rotary shuttle, adapting to the sewing needs of different types of shoe toes, bags, and other irregular shapes.

[0023] Figures 1 to 3 Also shown is a synchronous belt pulley power unit 2, which is disposed in the inner cavity of the vertical rocker arm body 11 and includes a driving pulley 21, a driven pulley 22, and a synchronous belt 23 connecting the two. The driven pulley 22 is connected to a driven pulley universal joint 24. The driving pulley 21 is driven by the head system and drives the driven pulley 22 through the synchronous belt 23, resulting in high transmission efficiency and suitability for high-speed sewing. A gear positioning unit 3 is positioned and installed in the aforementioned vertical rocker arm body 11. A shuttle drive unit 4 includes a shuttle ball head drive shaft 41 passing through the inclined arm body 12 and the rocker arm head 13, a shuttle drive gear 42 rotatably connected to the ball head end of the shuttle ball head drive shaft 41, and a transition gear 43 meshing with the shuttle drive gear 42. The other end of the aforementioned shuttle ball head drive shaft 41 is connected to the aforementioned driven pulley universal joint 24, and the aforementioned shuttle... One end of the transmission gear 42 is rotatably engaged with the rocker arm cover 14; the needle plate transmission unit 5 includes a needle plate ball head transmission shaft 51 and a needle plate transmission gear 52 rotatably connected to the ball head end of the needle plate ball head transmission shaft 51. The aforementioned needle plate ball head transmission shaft 51 passes through the inclined arm body 12 and through the aforementioned rocker arm head 13, and its end away from the aforementioned ball head end is rotatably connected with the aforementioned gear positioning unit 3; a shuttle support 6 is installed between the aforementioned rocker arm cover 14 and the aforementioned rocker arm head 13, and the shuttle support 6 is meshed with the transition gear 43 of the aforementioned shuttle support transmission unit 4; the shuttle assembly 7 includes an inner shuttle 71 and an outer shuttle 72. The aforementioned outer shuttle 72 is fitted between the aforementioned shuttle support 6 and the rocker arm cover 14, while the aforementioned inner shuttle 71 is installed between the aforementioned shuttle support 6 and the rocker arm head 13 and is meshed with the aforementioned needle plate transmission gear 52.

[0024] This design provides a cost-effective solution for sewing thick curved surfaces. The inclined support arm with a small angle (5° to 25°) expands the operating space, making it easier to fit high-top shoes such as snow boots, especially meeting the sewing needs of high-top shoes. In practical applications, the operator can complete the positioning without forcefully twisting the boot body, which not only reduces manual fatigue but also avoids stitch deviation caused by excessive stretching of the shoe upper. The all-gear structure eliminates the cumulative error of transmission backlash, effectively solving the problem of needle breakage caused by needle plate wobbling. At the same time, the gear meshing transmission is smooth and reliable, and the closed-loop control of the gear positioning unit 3 and the needle plate transmission unit 5 greatly improves the dynamic stability of the rocker arm movement.

[0025] Furthermore, a vertical rocker arm connecting section 111 is formed on the surface of the aforementioned vertical rocker arm 11 facing the aforementioned inclined arm 12. The vertical rocker arm connecting section 111 is located at the middle position in the height direction of the vertical rocker arm 11 and is inclined to the horizontal direction. One end of the aforementioned inclined arm 12 in the length direction is fixed to the vertical rocker arm connecting section 111, thereby realizing the fixed connection between the inclined arm 12 and the vertical rocker arm 11.

[0026] In this embodiment, a rocker arm pivot sleeve 112 is fixedly mounted on the aforementioned vertical rocker arm body 11. A rocker arm pivot sleeve through hole 1121 is formed in the rocker arm pivot sleeve 112, and an angular contact bearing 1122 is fitted and installed in the rocker arm pivot sleeve through hole 1121. The aforementioned rocker arm fixing sleeve 15 includes a rocker arm fixing sleeve connecting plate 151, a rocker arm fixing sleeve boss 152, and a rocker arm fixing sleeve positioning shaft 153 coaxially arranged. The aforementioned rocker arm fixing sleeve connecting plate 151 is fixed to the side sewing machine body, thereby realizing the fixation of the rocker arm fixing sleeve 15 body. The aforementioned rocker arm fixing sleeve boss 152 is located on one side of the rocker arm fixing sleeve connecting plate 151, while the rocker arm fixing sleeve positioning shaft 153 is located on the side of the aforementioned rocker arm fixing sleeve boss 152 opposite to the aforementioned rocker arm fixing sleeve connecting plate 151. The aforementioned rocker arm fixing sleeve positioning shaft 153 passes through the aforementioned rocker arm pivot sleeve through hole 1121 and rotates with the aforementioned angular contact bearing 1122, thereby enabling the aforementioned rocker arm pivot sleeve 112 to reciprocate on the rocker arm fixing sleeve 15 to achieve a rotational connection between the vertical rocker arm body 11 and the rocker arm fixing sleeve 15.

[0027] Please continue reading Figure 1 and Figure 2A vertical rocker arm central shaft 113 is also fixedly installed on the aforementioned vertical rocker arm body 11. The vertical rocker arm central shaft 113 passes sequentially through the rocker arm pivot sleeve 112 and the rocker arm fixing sleeve 15 and extends outward from the rocker arm fixing sleeve 15. The aforementioned driving wheel 21 is fitted on the vertical rocker arm central shaft 113, thereby achieving its own positioning. In this embodiment, the rocker arm fixing sleeve 15 body rotates in conjunction with the angular contact bearing 1122, thereby supporting the bidirectional swing of the rocker arm pivot sleeve 112 and the vertical rocker arm body 11. At the same time, the through-type design of the vertical rocker arm central shaft 113 effectively ensures the coaxial positioning of the driving wheel 21 and reduces transmission eccentric wear.

[0028] In this embodiment, the aforementioned gear positioning unit 3 includes a positioning gear 31, a planetary gear 32 meshing with the positioning gear 31, a positioning universal joint 33 rotatably connected to the planetary gear 32, and a planetary gear positioning bracket 34. The positioning gear 31 is fitted onto the rocker arm fixing sleeve boss 152 of the rocker arm fixing sleeve 15 and can rotate thereon. A positioning gear fixing plate is also installed on the positioning gear 31. In actual use, by loosening the positioning gear fixing plate and adjusting the position of the positioning gear 31 and the rocker arm fixing sleeve 15, the position of the shuttle assembly 7 and the needle plate 73 can be finely adjusted through the transmission of each transmission component. The aforementioned planetary gear 32 is located below the positioning gear 31 and is housed within the aforementioned gear positioning bracket 34. The planetary gear 32 includes a planetary gear part 321, a planetary gear positioning shaft 322, and a planetary gear connecting section 323 coaxially arranged. The gear part 321 of the planetary gear extends upward from the gear positioning bracket 34 and meshes with the circumferential gear section of the positioning gear 31. The planetary gear 32 and the positioning gear 31 form a differential transmission mechanism, and further convert the rotational motion into the precise displacement of the needle plate ball head drive shaft 51 through the positioning universal joint 33. The aforementioned planetary gear positioning bracket 34 is fixedly installed on the aforementioned vertical rocker arm 11, and a planetary gear positioning bracket cover plate 341 is also installed on the planetary gear positioning bracket 34. The aforementioned planetary gear positioning shaft 322 passes through the planetary gear positioning bracket cover plate 341 and achieves rotational engagement with it. The aforementioned planetary gear connecting section 323 extends outward from the aforementioned planetary gear positioning bracket 34, and the aforementioned positioning universal joint 33 is rotatably connected with the planetary gear connecting section 323. The end of the needle plate ball head drive shaft 51 of the aforementioned needle plate transmission unit 5 that is away from the ball head end in the length direction is fitted into the aforementioned positioning universal joint 33 and installed together with it.

[0029] In this embodiment, the driven wheel 22 of the aforementioned synchronous belt pulley power unit 2 includes a driven wheel gear segment 221 and a driven wheel positioning shaft 222 and a driven wheel connecting shaft 223 formed on both sides of the driven wheel gear segment 221; the aforementioned synchronous belt pulley power unit 2 also includes a driven wheel bracket 25 fixedly installed in the inner cavity of the aforementioned vertical rocker arm body 11. The driven wheel positioning shaft 222 of the aforementioned driven wheel 22 passes through the driven wheel bracket 25 and achieves rotational engagement with the driven wheel bracket 25 through a driven wheel bearing 224 to achieve positioning of the driven wheel 22. The aforementioned driven wheel gear segment 221 is meshed and rotatably connected to the aforementioned synchronous belt 23, and the aforementioned driven wheel universal joint 24 is rotatably connected to the driven wheel connecting shaft 223.

[0030] Furthermore, the aforementioned shuttle transmission unit 4's shuttle transmission gear component 42 includes a shuttle transmission gear component gear segment 421, a shuttle transmission gear component connecting sleeve 422, and a shuttle transmission gear component positioning shaft 423 coaxially arranged. The aforementioned shuttle transmission gear component gear segment 421 meshes with the circumferential gear portion of the aforementioned transition gear 43. The aforementioned shuttle transmission gear component connecting sleeve 422 is located on one side of the aforementioned shuttle transmission gear component gear segment 421, and the shuttle transmission gear component connecting sleeve 422 is rotatably sleeved on the ball end of the aforementioned shuttle ball head transmission shaft 41, thereby realizing the rotational connection between the shuttle transmission gear component 42 and the shuttle ball head transmission shaft 41. Preferably, the ball end of the aforementioned shuttle ball head transmission shaft 41 and the shuttle transmission gear component 42 are connected by a ball hinge, and the ball end and the shuttle transmission gear component connecting sleeve 422 are clearance-fitted, allowing a slight axial float to alleviate gear meshing impact.

[0031] Please continue reading Figures 1 to 3 A rocker arm cover pad 141 is fixedly installed on the side surface of the rocker arm cover 14 facing the inclined arm body 12, and a shuttle drive gear bearing 142 is installed at the lower part of the rocker arm cover 14. The shuttle drive gear positioning shaft 423 of the shuttle drive gear 42 passes through the shuttle drive gear bearing 142 and cooperates with it, thereby realizing the positioning of the shuttle drive gear 42.

[0032] Furthermore, the needle plate transmission gear 52 of the aforementioned needle plate transmission unit 5 includes a needle plate transmission gear gear portion 521 and a needle plate transmission gear connecting sleeve 522 located on one side of the needle plate transmission gear portion 521; wherein, the aforementioned needle plate transmission gear portion 521 is connected to the inner shuttle 71 of the aforementioned shuttle assembly 7 by gear meshing transmission, and the aforementioned needle plate transmission gear connecting sleeve 522 is rotatably fitted on the ball end of the aforementioned needle plate ball head transmission shaft 51, thereby realizing the rotational connection between the needle plate transmission gear 52 and the needle plate ball head transmission shaft 51.

[0033] Preferably, the aforementioned shuttle assembly 7 further includes a needle plate 73, which is positioned above the aforementioned shuttle support 6, the inner shuttle 71, and the outer shuttle 72, and the needle plate 73 is fixedly connected to the aforementioned inner shuttle 71 and outer shuttle 72 by fasteners.

[0034] Please see Figures 1 to 3 This invention employs a multi-stage gear meshing power transmission mode. The synchronous belt pulley power unit 2 sequentially drives the shuttle ball head drive shaft 41, the shuttle drive gear, the transition gear 43, and the shuttle 6, ultimately driving the shuttle assembly 7 to complete the thread hooking action. When the operator rotates the inclined arm 12 for convenient placement of the shoe for sewing, the needle plate ball head drive shaft 51 follows and drives the planetary gear 32 to rotate around the positioning gear 31. The ball head end of the needle plate ball head drive shaft 51 then drives the needle plate drive gear 52 to rotate. This allows the needle plate transmission gear 52 to rotate around the gear ring of the inner shuttle 71, achieving synchronous reverse compensation between the shuttle assembly 7 and the needle plate 73. This ensures that the needle plate 73 remains relatively stationary. By combining the inclined arm 12 with a small angle and stable transmission, the device can meet the sewing needs of high-top shoes such as snow boots and hiking boots, as well as curved surfaces of bags, greatly expanding its applicability. Furthermore, without the need to add an electronic control system, it achieves a dual breakthrough in ease of operation and transmission accuracy, providing a cost-effective solution for the sewing of thick curved surfaces.

[0035] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

[0036] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the utility model task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A low angle side seam machine rocker drive characterized by, It includes: The arm body unit (1) includes a vertical rocker body (11), a inclined arm body (12) connected to the vertical rocker body (11), a rocker head (13) sleeved on the inclined arm body (12), and a rocker cover (14) installed at the end of the rocker head (13) away from the inclined arm body (12), the vertical rocker body (11) is installed on a rocker fixed sleeve (15) and can rotate relative to the rocker fixed sleeve (15); The synchronous belt pulley power unit (2) is arranged in the inner cavity of the vertical rocker body (11), which includes a driving wheel (21), a driven wheel (22) and a synchronous belt (23) connecting the two, the driven wheel (22) is connected with a driven wheel universal joint (24); The gear positioning unit (3) is positioned and installed in the vertical rocker body (11); The shuttle support transmission unit (4) includes a shuttle support ball head transmission shaft (41) penetrating in the inclined arm body (12) and the rocker head (13), a shuttle transmission gear (42) rotatably connected to the ball head end of the shuttle support ball head transmission shaft (41), and a transition gear (43) meshing with the shuttle transmission gear (42), the other end of the shuttle support ball head transmission shaft (41) is connected with the driven wheel universal joint (24), and one end of the shuttle transmission gear (42) is rotatably connected with the rocker cover (14); The needle plate transmission unit (5) includes a needle plate ball head transmission shaft (51) and a needle plate transmission gear (52) rotatably connected to the ball head end of the needle plate ball head transmission shaft (51), the needle plate ball head transmission shaft (51) penetrates in the inclined arm body (12) and passes through the rocker head (13), and the end of the needle plate ball head transmission shaft (51) away from the ball head end is rotatably connected with the gear positioning unit (3); A shuttle piece (6) is installed between the rocker cover (14) and the rocker head (13), and the shuttle piece (6) is meshingly connected with the transition gear (43) of the shuttle transmission unit (4); The shuttle assembly (7) includes an inner shuttle (71) and an outer shuttle (72), the outer shuttle (72) is installed between the shuttle piece (6) and the rocker cover (14), and the inner shuttle (71) is installed between the shuttle piece (6) and the rocker head (13) and is meshingly connected with the needle plate transmission gear (52).

2. A rocker drive for a low angle side seam machine as defined in claim 1, wherein: The oblique arm body (12) is inclined 5-25° relative to the horizontal direction; a vertical rocker body connecting section (111) is formed on one side surface of the vertical rocker body (11) towards the oblique arm body (12), the vertical rocker body connecting section (111) is arranged at the middle position in the height direction of the vertical rocker body (11) and is inclined relative to the horizontal direction, and one end of the oblique arm body (12) in the length direction is fixedly connected to the vertical rocker body connecting section (111), so that the oblique arm body (12) is fixedly connected to the vertical rocker body (11).

3. A rocker drive for a low angle side seam machine as defined in claim 2, wherein: A rocker pivot sleeve (112) is fixedly arranged on the vertical rocker body (11), a rocker pivot sleeve through hole (1121) is formed in the rocker pivot sleeve (112), and an angular contact bearing (1122) is fittedly arranged in the rocker pivot sleeve through hole (1121); the rocker fixing sleeve (15) comprises a rocker fixing sleeve connecting plate (151), a rocker fixing sleeve boss (152) and a rocker fixing sleeve positioning shaft (153) arranged coaxially, the rocker fixing sleeve connecting plate (151) is fixed to the side seaming machine body, so that the rocker fixing sleeve (15) body is fixed, the rocker fixing sleeve boss (152) is arranged at one side of the rocker fixing sleeve connecting plate (151), and the rocker fixing sleeve positioning shaft (153) is arranged at the side of the rocker fixing sleeve boss (152) opposite to the rocker fixing sleeve connecting plate (151), the rocker fixing sleeve positioning shaft (153) penetrates the rocker pivot sleeve through hole (1121) and is rotatably connected to the angular contact bearing (1122), so that the rocker pivot sleeve (112) can rotate reciprocatingly on the rocker fixing sleeve (15) to realize the rotary connection of the vertical rocker body (11) and the rocker fixing sleeve (15).

4. A rocker drive for a low angle side seam machine as defined in claim 3, wherein: A vertical rocker body center shaft (113) is also fixedly arranged on the vertical rocker body (11), the vertical rocker body center shaft (113) penetrates the rocker pivot sleeve (112) and the rocker fixing sleeve (15) in sequence and projects out of the rocker fixing sleeve (15), and the driving wheel (21) is sleeved on the vertical rocker body center shaft (113), so that the driving wheel (21) is positioned.

5. A rocker drive for a low angle side seam machine as defined in claim 3, wherein: The gear positioning unit (3) comprises a positioning gear part (31), a planetary gear part (32) in meshing connection with the positioning gear part (31), a positioning universal joint (33) rotatably connected to the planetary gear part (32), and a planetary gear part positioning bracket (34). The positioning gear part (31) is sleeved on the rocker arm fixing sleeve boss (152) of the rocker arm fixing sleeve (15) and can rotate thereon, and the planetary gear part (32) is arranged below the positioning gear part (31) and is arranged in the gear part positioning bracket (34). The planetary gear part (32) comprises a planetary gear part gear part (321), a planetary gear part positioning shaft (322) and a planetary gear part connecting section (323) arranged coaxially. The planetary gear part gear part (321) protrudes upward from the gear part positioning bracket (34) and is in meshing transmission connection with the circumferential gear section of the positioning gear part (31). The planetary gear part positioning bracket (34) is fixedly installed on the vertical rocker arm body (11), and a planetary gear part positioning bracket cover plate (341) is also installed on the planetary gear part positioning bracket (34). The planetary gear part positioning shaft (322) penetrates through the planetary gear part positioning bracket cover plate (341) and is in rotational cooperation with the planetary gear part positioning bracket cover plate (341). The planetary gear part connecting section (323) protrudes outward from the planetary gear part positioning bracket (34), and the positioning universal joint (33) is in rotational connection with the planetary gear part connecting section (323). The needle plate ball head transmission shaft (51) of the needle plate transmission unit (5) is sleeved in the positioning universal joint (33) and is installed together with the positioning universal joint (33).

6. A rocker drive for a low angle side seam machine as defined in claim 1, wherein: The driven gear part (22) of the synchronous belt pulley power unit (2) comprises a driven gear part gear section (221), a driven gear part positioning shaft body (222) and a driven gear part connecting shaft body (223) arranged on both sides of the driven gear part gear section (221). The synchronous belt pulley power unit (2) further comprises a driven gear part bracket (25) fixedly installed in the inner cavity of the vertical rocker arm body (11). The driven gear part positioning shaft body (222) of the driven gear part (22) penetrates through the driven gear part bracket (25) and is in rotational cooperation with the driven gear part bracket (25) through a driven gear part bearing (224) to realize positioning of the driven gear part (22). The driven gear part gear section (221) is in meshing rotational connection with the synchronous belt (23). The driven gear part universal joint (24) is in rotational connection with the driven gear part connecting shaft body (223) through a pin shaft.

7. A rocker drive for a low angle side seam machine as defined in claim 1, wherein: The shuttle transmission gear piece (42) of the shuttle transmission unit (4) comprises a coaxially arranged shuttle transmission gear piece gear segment (421), a shuttle transmission gear piece connecting sleeve (422) and a shuttle transmission gear piece positioning shaft (423), the shuttle transmission gear piece gear segment (421) is in meshing transmission connection with the circumferential gear portion of the transition gear (43), the shuttle transmission gear piece connecting sleeve (422) is arranged at one side of the shuttle transmission gear piece gear segment (421), and the shuttle transmission gear piece connecting sleeve (422) is rotatably sleeved on the ball head end of the shuttle ball head transmission shaft (41), so as to realize the rotary connection of the shuttle transmission gear piece (42) and the shuttle ball head transmission shaft (41).

8. A rocker drive for a low angle side seam machine as defined in claim 1, wherein: A rocker cover gusset plate (141) is fixedly installed on one side surface of the rocker cover (14) facing the inclined arm body (12), and a shuttle transmission gear piece bearing (142) is installed at the lower position of the rocker cover (14), the shuttle transmission gear piece positioning shaft (423) of the shuttle transmission gear piece (42) penetrates the shuttle transmission gear piece bearing (142) and is in cooperation with the same, so as to realize the positioning of the shuttle transmission gear piece (42).

9. A rocker drive for a low angle side seam machine as defined in claim 1, wherein: The needle plate transmission gear piece (52) of the needle plate transmission unit (5) comprises a needle plate transmission gear piece gear portion (521) and a needle plate transmission gear piece connecting sleeve (522) arranged at one side of the needle plate transmission gear piece gear portion (521); wherein the needle plate transmission gear piece gear portion (521) is in gear meshing transmission connection with the inner shuttle (71) of the shuttle assembly (7), and the needle plate transmission gear piece connecting sleeve (522) is rotatably sleeved on the ball head end of the needle plate ball head transmission shaft (51), so as to realize the rotary connection of the needle plate transmission gear piece (52) and the needle plate ball head transmission shaft (51).

10. A rocker drive for a low angle side seam machine as defined in claim 1, wherein: The shuttle assembly (7) further comprises a needle plate (73) which is positioned and installed above the shuttle piece (6), the inner shuttle (71) and the outer shuttle (72), and the needle plate (73) is fixedly connected with the inner shuttle (71) and the outer shuttle (72) by fasteners.

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