A sealed lubricated auxiliary feed device

Abstract

This utility model discloses a sealed and lubricated auxiliary feeding device, relating to the field of sewing equipment technology. It includes a feeding roller with a planetary gear carrier rotatably mounted inside its cavity. The rotation axis of the planetary gear carrier coincides with the axis of the planetary roller. Each support of the planetary gear carrier is connected to a thrust spring, the extension and contraction direction of which is perpendicular to the axis of the feeding roller. Planetary rollers are positioned between adjacent supports, and the thrust springs support the planetary rollers, clamping them between the inner wall of the feeding roller and the supports. Sealing caps are provided at both ends of the feeding roller, and the inner cavity of the feeding roller is filled with lubricating oil. This sealed and lubricated auxiliary feeding device solves the technical problem of existing auxiliary feeding devices lacking a lubrication system, thus reducing the reliability and service life of the feeding device.

Description

Technical Field

[0001] This utility model relates to the field of sewing equipment technology, and in particular to an auxiliary feeding device for sealing and lubrication. Background Technology

[0002] Most sewing machines today use feed dogs for material feeding. When sewing fabrics that are prone to slipping or wrinkling, relying solely on feed dogs often results in insufficient fabric feeding or uneven stitch spacing. This necessitates manual dragging, which frequently leads to needle breakage and uneven stitches, failing to meet the demands of large-scale, high-efficiency production. Introducing a rear drag wheel can effectively solve this problem. Currently, most sewing machines use wheel-type rear drag wheels. In these wheel-type drag wheels, the drive lever is in direct contact with the star wheel and the inner wall of the mounting bracket, and there is no internal lubrication. At speeds of 3500 RPM or higher, or during prolonged operation, this can easily cause component wear, leading to jamming, fabric contamination, and other problems, thus affecting normal sewing. Furthermore, one side of the star wheel is locked to the mounting bracket with screws, causing the roller on this side to constantly rub against the inner wall of the roller, easily damaging the roller and reducing the drag wheel's lifespan.

[0003] In summary, developing an auxiliary feeding device with a lubrication structure, longer service life, and greater reliability is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a sealed and lubricated auxiliary feeding device, which solves the technical problem that existing auxiliary feeding devices do not have a lubrication device, thus reducing the reliability and service life of the feeding device.

[0005] To achieve the above objectives, this utility model provides a sealing and lubrication auxiliary feeding device, comprising:

[0006] The feeding roller has a planetary gear carrier rotatably mounted inside its cavity. The rotation axis of the planetary gear carrier coincides with the rotation axis of the feeding roller. Each support of the planetary gear carrier is connected to a thrust spring. The extension and contraction direction of the thrust spring is perpendicular to the axis of the feeding roller. Planetary rollers are mounted between adjacent supports. The thrust springs are used to hold the planetary rollers, clamping them between the inner wall of the feeding roller and the supports. Sealing caps are provided at the ports on both sides of the feeding roller. The inner cavity of the feeding roller is filled with lubricating oil.

[0007] Preferably, the planetary gear carrier includes three supports, each support being symmetrical about the axis of the planetary gear carrier. The ends of the supports are fitted with the inner walls of the feeding rollers with clearance. Each support has two snap-fit ​​grooves on its end face for connecting the thrust springs.

[0008] Preferably, the planetary gear carrier's shaft extends to the outside of the feeding roller, and the end of the shaft passes through the drive rocker arm. The end side wall of the shaft that mates with the drive rocker arm is provided with a bearing surface, and a locking member passes through the side wall of the drive rocker arm. The locking member abuts against the bearing surface to fix the drive rocker arm and the shaft together.

[0009] Preferably, the feeding roller is provided with side brackets on both sides, the rotating shaft passes through each side bracket, and each end of the rotating shaft is provided with a first annular groove. Each side bracket is provided with a first retaining spring on the side away from the feeding roller, and the first retaining spring is connected to the first annular groove to restrict the axial degree of freedom of the rotating shaft.

[0010] Preferably, a mounting bracket is clamped between the side brackets, the upper end face of the mounting bracket is provided with a mating hole, and the side wall of the feeding roller is provided with an oil injection hole, through which lubricating oil is supplied to the inner cavity of the feeding roller, and the oil injection hole can correspond to the mating hole.

[0011] Preferably, the side wall of the mounting bracket is provided with mounting holes for fixing the feed roller to the sewing device, and each side bracket is connected to the mounting bracket by fastening screws.

[0012] Preferably, each side bracket is provided with a second retaining spring between it and the feeding roller. Both sides of the feeding roller are provided with a mating groove. The rotating shaft is provided with a second annular groove at the corresponding position of the mating groove. The mating groove is engaged with the sealing cover. The second annular groove is engaged with the second retaining spring. The second retaining spring is fitted with the sealing cover to lock the position of the sealing cover.

[0013] Preferably, the oil injection hole can be matched with the sealing bolt, and a sealing groove is provided at the end of the oil injection hole. A sealing gasket is provided on the bottom surface of the sealing groove. The sealing groove is used to accommodate the screw head of the sealing bolt, and the screw head of the sealing bolt abuts against the sealing gasket.

[0014] Preferably, the outer wall of the feeding roller is provided with teeth for pressing the fabric.

[0015] Preferably, a sealing ring is provided on the bottom surface of the docking groove, and the sealing ring fits into the sealing cover.

[0016] Compared to the aforementioned background technology, the auxiliary feeding device for sealing and lubrication provided by this utility model includes: a feeding roller for bonding fabric, a planetary gear carrier rotatably mounted inside the feeding roller, the rotation axis of the planetary gear carrier coinciding with the axis of the feeding roller, the planetary gear carrier having several support plates, a thrust spring connected to the side wall of each support plate, the extension and retraction direction of the thrust spring pointing towards the side wall of the adjacent support plate, planetary rollers being arranged between adjacent support plates, the rotation axis of each planetary roller being parallel to the axis of the feeding roller, the thrust springs pushing the planetary rollers to tightly clamp the planetary rollers between the side wall of the support plate and the inner wall of the feeding roller, and sealing caps provided at the ports on both sides of the feeding roller, the sealing caps closing the ports on both sides of the feeding roller, thus sealing the interior of the feeding roller. The device has a closed chamber filled with lubricating oil, which allows the planetary gear carrier and planetary rollers to roll smoothly. In the process of assisting in the conveying of fabric, the outer wall of the feeding roller tightly presses the fabric, and the thrust springs on the planetary gear carrier push the planetary rollers, clamping them between the support plate and the side wall of the feeding roller. After the planetary gear carrier rotates, the support plate pushes the planetary rollers, which roll along the inside of the feeding roller, simultaneously driving the feeding roller to rotate. The feeding roller drives the fabric forward through friction. Furthermore, since the planetary gear carrier and planetary rollers are located in the inner cavity of the feeding roller, the inner cavity can contain lubricating oil and lubricate the contact points of each component, preventing severe wear or jamming caused by the high-speed operation of the auxiliary feeding device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 Exploded view of the sealing and lubrication auxiliary feeding device provided in the embodiment of this utility model;

[0019] Figure 2 This is a structural diagram of the auxiliary feeding device for sealing and lubrication provided in an embodiment of the present utility model.

[0020] Among them, 1-feeding roller; 2-planetary gear frame; 21-support plate; 22-rotating shaft; 3-planetary roller; 4-thrust spring; 5-connection groove; 6-sealing cover; 7-first snap ring; 8-second snap ring; 9-side bracket; 10-mounting bracket; 11-oil injection hole; 12-connection hole; 13-sealing bolt; 14-sealing gasket; 15-locking component; 16-drive swing arm. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] This application provides an auxiliary feeding device for sealing and lubrication; please refer to the appendix of the specification. Figure 1 To be continued Figure 2 The auxiliary feeding device includes a feeding roller 1 for pressing the fabric. The feeding roller 1 has an inner cavity for accommodating a planetary gear carrier 2. The planetary gear carrier 2 can rotate inside the planetary gear carrier 2. Several support plates 21 extend from the planetary gear carrier 2. A thrust spring 4 is connected to the side wall of each support plate 21. Preferably, the extension and retraction direction of each thrust spring 4 is towards one side of the adjacent support plate 21. The end of the support plate 21 is in clearance fit with the inner wall of the feeding roller 1. Planetary rollers 3 are provided between adjacent support plates 21. The rotation axis of the planetary rollers 3 is parallel to the rotation axis of the planetary gear carrier 2. Each planetary roller 3 can abut against the thrust spring 4. The thrust spring 4 pushes the planetary rollers 3, so that the planetary rollers 3 are always clamped between the side wall of the support plate 21 and the inner wall of the feeding roller 1, so that the planetary rollers... The wheel 3 provides sufficient friction for the feeding roller 1. Furthermore, sealing covers 6 are provided at both ends of the feeding roller 1. The sealing covers 6 enclose the feeding roller 1 into a sealed chamber. This chamber is used to contain lubricating oil, so that the lubricating oil can fully wet the feeding roller 1 and its internal components, reducing the friction generated by the components during the rotation of the planetary gear carrier 2. It should be noted that the thrust spring 4 has a high elastic coefficient and can apply a large thrust. Even after the planetary roller 3 is wetted with lubricating oil, it can still provide sufficient friction for the feeding roller 1. In actual operation, the rotation speed of the planetary gear carrier 2 can reach 3500 revolutions per minute or more, so that the planetary roller 3 rotates at high speed, providing a stable and reliable driving force for the feeding roller 1.

[0024] Please refer to the instruction manual appendix. Figure 1The planetary gear carrier 2 has three support plates 21. Each support plate 21 is symmetrical about the rotation axis of the planetary gear carrier 2. The rotation axis is the side of each support plate 21 closest to the rotating shaft 22. Each support plate 21 swings at a certain angle. Each support plate 21 has two locking grooves on the side wall on the inclined side. Each locking groove is used to connect the thrust spring 4. The angle between the clamping plate and the inner wall of the feeding roller 1 is called the clamping angle. The thrust spring 4 pushes each planetary roller 3 to the side with a smaller clamping angle. The thrust of the thrust spring 4 on the planetary roller 3 forms a large component force on the inner wall of the feeding roller 1, making it easier for the planetary roller 3 to provide reliable friction for the feeding roller 1.

[0025] Furthermore, the planetary gear carrier 2 is also provided with a rotating shaft 22. The length of the rotating shaft 22 is greater than the width of the feeding roller 1. After the planetary gear carrier 2 is placed inside the feeding roller 1, the rotating shaft 22 extends to the outside of the feeding roller 1. One end of the rotating shaft 22 passes through the inside of the drive rocker arm 16. The end of the rotating shaft 22 connected to the drive rocker arm 16 is referred to as the drive end. The side wall of the drive end is provided with a bearing surface, which is specifically a plane. There is a threaded hole on the side wall of the drive rocker arm 16. By rotating the drive rocker arm 16, the threaded hole is aligned with the bearing surface. Preferably, the drive end has two bearing surfaces, and the two bearing surfaces are perpendicular to each other. The locking member 15 is screwed into the threaded hole so that the end of the locking member 15 abuts against the bearing surface. When the drive rocker arm 16 rotates, the end of the locking member 15 cannot slide along the flat bearing surface. That is, the drive rocker arm 16 and the rotating shaft 22 are fixedly connected by the locking member 15. The drive rocker arm 16 provides power to the locking member 15.

[0026] Preferably, side supports 9 are provided on both sides of the feeding roller 1. The rotating shaft 22 of the planetary gear carrier 2 passes through the end of the side support 9. The other end of each side support 9 is clamped with a mounting bracket 10. Each mounting bracket 10 has a mounting hole on the side wall between the two side supports 9. The operator fixes the auxiliary feeding device in a designated position through the mounting hole. The side support 9 and the mounting bracket 10 are connected by two screws. Furthermore, an oil injection hole 11 is provided on the side wall of the feeding roller 1. Correspondingly, a mating hole 12 is provided on the top surface of the mounting bracket 10. The oil injection hole 11 communicates with the inner cavity of the feeding roller 1. A sealing groove is provided at the port of the oil injection hole 11. The inner wall of the oil injection hole 11 is threaded. A sealing gasket 14 is provided on the bottom surface of the sealing groove. A sealing bolt 13 can be threaded into the oil injection hole 11. The screw head of the sealing bolt 13 mates with the sealing groove. The bottom surface of the sealing bolt 13 abuts against the sealing gasket 14 to seal the oil injection hole 11. When it is necessary to inject lubricating oil into the feeding roller 1, the operator rotates the feeding roller 1 to align the oil injection hole 11 with the docking hole 12. The screw removal tool passes through the docking hole 12 and engages with the screw head of the sealing bolt 13. Then, the sealing bolt 13 is removed from the oil injection hole 11, and the oil injection pipe is connected to the oil injection hole 11 to deliver lubricating oil into the inner cavity of the feeding roller 1.

[0027] Please refer to the instruction manual appendix. Figure 1 On both sides of the feeding roller 1, there are mating grooves 5 at the port. The mating grooves 5 are used to accommodate the sealing caps 6. Each sealing cap 6 is spaced apart from the side bracket 9. A second retaining spring 8 is provided on the side of the sealing cap 6 near the side bracket 9. Correspondingly, a second annular groove is provided at the position of the rotating shaft 22 corresponding to the port of the feeding roller 1. The second retaining spring 8 cooperates with the second annular groove, and at this time, the second retaining spring 8 is tightly fitted with each sealing cap 6. The second retaining spring 8 is used to restrict the axial degree of freedom of the rotating shaft 22 to prevent the planetary gear carrier 2 from shifting when rotating, and to prevent it from colliding with the sealing caps 6 and affecting the feeding. To further enhance the sealing performance of the roller 1, a first retaining spring 7 is provided on the side of each side bracket 9 facing away from the feeding roller 1. Similarly, a first annular groove is provided at the position corresponding to the side wall of each side bracket 9 on the rotating shaft 22. The first annular groove and the first retaining spring 7 are connected to lock the position of each first retaining spring 7. At this time, the first retaining spring 7 abuts against the side wall of each side bracket 9, further restricting the axial degree of freedom of the rotating shaft 22 and ensuring the structural stability of the auxiliary feeding device. In addition, a sealing ring is provided on the bottom surface of the docking groove 5. The sealing ring fits with the sealing cover 6 and is used to enhance the sealing performance of the feeding roller 1.

[0028] Preferably, both the first retaining ring 7 and the second retaining ring 8 are C-shaped circular plates, and the inner edges of the first retaining ring 7 and the second retaining ring 8 are provided with several grooves. Each groove reduces the width of different sections of the first retaining ring 7 and the second retaining ring 8, and the narrower part is easier to deform, which simplifies the installation operation of the first retaining ring 7 and the second retaining ring 8. Preferably, the outer wall of the feeding roller 1 is provided with several teeth, and the side wall of each tooth has friction texture, which enhances the friction between the feeding roller 1 and the fabric, so that the feeding roller 1 can stably transport the fabric.

[0029] In one embodiment of this application, the feeding roller 1 presses the fabric to be conveyed by its teeth, activating the drive unit. The output end of the drive unit drives the drive swing rod 16 to rotate, which in turn drives the rotating shaft 22 to rotate, causing the planetary gear carrier 2 to rotate within the inner cavity of the feeding roller 1. Simultaneously, the thrust springs 4 on each support plate 21 press against each planetary roller 3, ensuring that the planetary roller 3 is always in close contact with the side wall of the support plate 21 and the inner wall of the feeding roller 1. Sealing caps 6 are fitted at the ports on both sides of the feeding roller 1, allowing the inner cavity of the feeding roller 1 to contain lubricating oil. When the planetary gear carrier 2 rotates, each support plate 2... When the planetary roller 3 is pushed, the planetary roller 3 moves relative to the inner wall of the feeding roller 1. Due to the thrust spring 4 holding the planetary roller 3, there is a certain friction between the planetary roller 3 and the inner wall of the feeding roller 1. During the rotation of the feeding roller 1, the feeding roller 1 also applies friction to the inner wall of the feeding roller 1, so that the feeding roller 1 rotates to transport the fabric. Since the inner wall of the feeding roller 1, the planetary roller 3, and the planetary wheel frame 2 are wetted with lubricating oil, the friction between each component is within a controllable range, so that the planetary roller 3 can drive the feeding roller 1 to rotate while avoiding jamming between the components.

[0030] This application places the planetary gear carrier 2 and the planetary roller 3 in the inner cavity of the feeding roller 1 and seals the inner cavity of the feeding roller 1 to fill it with lubricating oil, so that the auxiliary feeding device has better durability and stability when running at high speed.

[0031] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0032] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A sealed and lubricated auxiliary feeding device, characterized in that, include: A feeding roller (1) is provided with a planetary gear carrier (2) rotatably mounted in the inner cavity of the feeding roller (1). The rotation axis of the planetary gear carrier (2) coincides with the axis of the feeding roller (1). Each support plate (21) of the planetary gear carrier (2) is connected to a thrust spring (4). The extension and retraction direction of the thrust spring (4) is perpendicular to the axis of the feeding roller (1). A planetary roller (3) is provided between adjacent support plates (21). The thrust spring (4) is used to support the planetary roller (3) so that the planetary roller (3) is clamped between the inner wall of the feeding roller (1) and the support plate (21). Sealing caps (6) are provided at the ports on both sides of the feeding roller (1). The inner cavity of the feeding roller (1) is filled with lubricating oil.

2. The auxiliary feeding device for sealing and lubrication according to claim 1, characterized in that, The planetary gear carrier (2) includes three support plates (21). Each support plate (21) is symmetrical about the axis of the planetary gear carrier (2). The end of each support plate (21) is in clearance fit with the inner wall of the feeding roller (1). Each support plate (21) has two snap-fit ​​grooves on its end face. The snap-fit ​​grooves are used to connect each thrust spring (4).

3. The auxiliary feeding device for sealing and lubrication according to claim 2, characterized in that, The rotating shaft (22) of the planetary gear carrier (2) extends to the outside of the feeding roller (1). The end of the rotating shaft (22) passes through the drive rocker arm (16). The end side wall of the rotating shaft (22) that cooperates with the drive rocker arm (16) is provided with a bearing surface. The side wall of the drive rocker arm (16) is provided with a locking member (15). The locking member (15) abuts against the bearing surface to fix the drive rocker arm (16) and the rotating shaft (22) in a fixed connection.

4. The auxiliary feeding device for sealing and lubrication according to claim 3, characterized in that, The feeding roller (1) is provided with side brackets (9) on both sides. The rotating shaft (22) passes through each of the side brackets (9). The rotating shaft (22) is provided with a first annular groove at both ends. Each side bracket (9) is provided with a first snap ring (7) on the side away from the feeding roller (1). The first snap ring (7) is connected to the first annular groove to restrict the axial degree of freedom of the rotating shaft (22).

5. The auxiliary feeding device for sealing and lubrication according to claim 4, characterized in that, The side brackets (9) hold the mounting bracket (10) between them. The upper end face of the mounting bracket (10) is provided with a docking hole (12). The side wall of the feeding roller (1) is provided with an oil injection hole (11). The lubricating oil is delivered to the inner cavity of the feeding roller (1) through the oil injection hole (11). The oil injection hole (11) can correspond to the docking hole (12).

6. The auxiliary feeding device for sealing and lubrication according to claim 5, characterized in that, The mounting bracket (10) has mounting holes on its side wall for fixing the feeding roller (1) to the sewing device. Each side bracket (9) is connected to the mounting bracket (10) by fastening screws.

7. The auxiliary feeding device for sealing and lubrication according to claim 4, characterized in that, Each of the side brackets (9) and the feeding roller (1) is provided with a second retaining ring (8). Both sides of the feeding roller (1) are provided with a docking groove (5). The rotating shaft (22) is provided with a second annular groove corresponding to the docking groove (5). The docking groove (5) cooperates with the sealing cover (6). The second annular groove is connected to the second retaining ring (8). The second retaining ring (8) fits against the sealing cover (6) to lock the position of the sealing cover (6).

8. The auxiliary feeding device for sealing and lubrication according to claim 5, characterized in that, The oil injection hole (11) can be matched with the sealing bolt (13). A sealing groove is provided at the port of the oil injection hole (11). A sealing gasket (14) is provided on the bottom surface of the sealing groove. The sealing groove is used to accommodate the screw head of the sealing bolt (13). The screw head of the sealing bolt (13) abuts against the sealing gasket (14).

9. The auxiliary feeding device for sealing and lubrication according to claim 1, characterized in that, The outer wall of the feeding roller (1) is provided with teeth for pressing the fabric.

10. The auxiliary feeding device for sealing and lubrication according to claim 7, characterized in that, The bottom surface of the docking groove (5) is provided with a sealing ring, which fits against the sealing cover (6).

Images