Roller presser foot of sewing machine

Abstract

The utility model relates to the technical field of presser feet of sewing machines, and discloses a roller presser foot of a sewing machine, which comprises a presser foot, a vertical connecting column is fixedly mounted at the top of the presser foot, a U-shaped plate groove is arranged at the bottom of the presser foot, a rod groove communicated with the bottom of the presser foot is arranged inside the connecting column, and the connecting column is connected with the rod groove. A connecting plate matched with the plate groove is movably installed in the plate groove, a connecting rod inserted into the rod groove is fixedly installed at the top of the connecting plate, a first tooth groove is formed in the middle of the right side wall of the connecting rod, a through opening communicated with the rod groove is formed in the right side of the connecting column, and a first bearing is fixedly installed in the through opening. The position of the connecting plate at the bottom of the presser foot in the plate groove can be freely adjusted according to the thickness of cloth to be sewn, and the contact degree between the first roller and the second roller at the bottom of the presser foot and the cloth can be adjusted by changing the position of the connecting plate, so that the cloth can be sewn smoothly, and the situation that the cloth walks unsmoothly is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machine presser feet, in particular to a roller presser foot of a sewing machine. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on a sewing material so as to interweave or sew one or more layers of sewing material. The presser foot is an important component of the sewing machine and is used to apply pressure on the surface of the sewing material to keep the sewing material fixed and ensure that the sewing machine sews accurately and reliably. After the existing roller presser foot is installed, the roller at the bottom cannot be adjusted in the vertical direction. This will cause the roller presser foot to fail to affect sewing when pressing too thick or too thin fabrics. Thinner fabrics will cause the roller to not contact the sewing material closely enough, resulting in unstable feeding of the sewing material, while thicker fabrics will cause the roller to contact the sewing material too closely, resulting in easy jamming. For this reason, the present application proposes a roller presser foot for a sewing machine. Utility Model Content

[0003] In order to solve the problems raised in the above background technology, the utility model provides the following technical solutions: a roller presser foot of a sewing machine, comprising a presser foot, a vertical connecting column is fixedly installed on the top of the presser foot, a U-shaped plate groove is opened at the bottom of the presser foot, a rod groove connected with the bottom of the presser foot is opened inside the connecting column, a connecting plate matched with the plate groove is movably installed in the plate groove, a connecting rod inserted in the rod groove is fixedly installed on the top of the connecting plate, a first tooth groove is opened at the middle position of the right side wall of the connecting rod, a through opening connected with the rod groove is opened on the right side of the connecting column, a first bearing is fixedly installed in the through opening, An adjusting bolt is fixedly inserted between the inner ring walls of the first bearing, and a gear meshing with the first tooth groove is fixedly installed on one end of the adjusting bolt. A second tooth groove is opened at the middle position of the left side wall of the connecting rod, and a screw hole connected to the rod groove is opened on the left side of the connecting column. A bolt is threadedly inserted in the screw hole, and a limit block meshing with the second tooth groove is rotatably installed on one end of the bolt. A first wheel groove is opened at the bottom of the horizontal part of the connecting plate, and two first rollers are rotatably installed in the first wheel groove. Second wheel grooves are opened at the bottom of the two vertical parts of the connecting plate, and two second rollers are rotatably installed in each second wheel groove.

[0004] Preferably, the bottom ends of the two first rollers and the four second rollers are located at the same horizontal height, and the horizontal heights of the bottom ends of the two first rollers and the four second rollers are lower than the bottom of the connecting plate.

[0005] Preferably, the teeth of the first tooth groove are located on one side of the inner wall thereof, and the side wall of the gear is meshingly connected with the teeth on one side of the inner wall of the first tooth groove.

[0006] Preferably, teeth are provided on a side of the limit block away from the bolt, and the teeth on the side surface of the limit block can be engaged with the teeth on the inner wall of the second tooth groove.

[0007] Preferably, a groove is provided on the side of the limit block away from the teeth thereof, a second bearing is fixedly installed in the groove, and one end of the bolt is fixedly connected to the inner ring wall of the second bearing.

[0008] Preferably, slide grooves are provided at the bottom and bottom of both sides of the inner wall of the rod groove, and sliders are fixedly installed at the top and bottom of both sides of the connecting rod, and the sliders on both sides of the connecting rod are respectively located in the corresponding slide grooves and can slide therein.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The position of the connecting rod and the connecting plate can be adjusted by turning the adjusting bolt, so that the first roller and the second roller can press the material stably in the appropriate position without affecting the feeding of the cloth, and then the bolt is turned to push the limit block to move into the second tooth groove and engage with each other, thereby fixing the position of the connecting rod in the rod groove and the position of the connecting plate in the plate groove, so that the cloth to be sewn can be pressed normally and the cloth can avoid the situation where the cloth does not move smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the utility model;

[0014] Figure 3 It is an enlarged structural schematic diagram of A of the utility model;

[0015] Figure 4 This is a structural schematic diagram of the bottom of the presser foot of the utility model;

[0016] Figure 5 It is a schematic diagram of the cross-sectional structure of the connection between the bolt and the limit block of the utility model;

[0017] Figure 6 It is a schematic diagram of the cross-sectional structure of the connecting column of the utility model;

[0018] Figure 7 It is a schematic diagram of the cross-sectional structure of a part of the connecting rod of the utility model;

[0019] In the figure: 1, presser foot; 2, plate groove; 3, connecting plate; 4, first wheel groove; 5, first roller; 6, second wheel groove; 7, second roller; 8, connecting column; 9, rod groove; 10, connecting rod; 11, slide groove; 12, slider; 13, first tooth groove; 14, through port; 15, first bearing; 16, adjusting bolt; 17, gear; 18, second tooth groove; 19, screw hole; 20, bolt; 21, limit block; 22, groove; 23, second bearing. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Depend on Figure 1-7The utility model includes a presser foot 1, a vertical connecting column 8 is fixedly installed on the top of the presser foot 1, a U-shaped plate groove 2 is opened at the bottom of the presser foot 1, a rod groove 9 connected to the bottom of the presser foot 1 is opened inside the connecting column 8, a connecting plate 3 adapted to the plate groove 2 is movably installed, a connecting rod 10 inserted in the rod groove 9 is fixedly installed on the top of the connecting plate 3, a first tooth groove 13 is opened at the middle position of the right side wall of the connecting rod 10, and a through opening 1 connected to the rod groove 9 is opened on the right side of the connecting column 8. 4, a first bearing 15 is fixedly installed in the through hole 14, an adjusting bolt 16 is fixedly inserted between the inner ring walls of the first bearing 15, one end of the adjusting bolt 16 is fixedly installed with a gear 17 meshing with the first tooth groove 13, a second tooth groove 18 is opened at the middle position of the left side wall of the connecting rod 10, a screw hole 19 connected to the rod groove 9 is opened on the left side of the connecting column 8, a bolt 20 is threadedly inserted in the screw hole 19, and a limit block 21 meshing with the second tooth groove 18 is rotatably installed at one end of the bolt 20, and the connecting plate A first wheel groove 4 is provided at the bottom of the horizontal part 3, and two first rollers 5 are rotatably installed in the first wheel groove 4. Second wheel grooves 6 are provided at the bottom of the two vertical parts of the connecting plate 3, and two second rollers 7 are rotatably installed in each second wheel groove 6. By screwing the adjusting bolt 16, the gear 17 is driven to mesh and rotate with the first tooth groove 13 on the right side of the connecting rod 10, so that the connecting rod 10 can be driven to move up and down in the rod groove 9. When the connecting rod 10 moves, it will drive the connecting plate 3 at its bottom to move in the plate groove 2 The connecting plate 3 moves up and down, and the contact degree between the first roller 5 and the second roller 7 at the bottom and the cloth can be changed through the movement of the connecting plate 3, so that the first roller 5 and the second roller 7 can stably press the material in an appropriate position without affecting the conveying of the cloth, and then the bolt 20 is tightened to push the limit block 21 to move into the second tooth groove 18, so that the teeth on the side of the limit block 21 are engaged with the teeth in the second tooth groove 18, thereby fixing the position of the connecting rod 10 in the rod groove 9 and the position of the connecting plate 3 in the plate groove 2.

[0022] At the same time, the bottom ends of the two first rollers 5 and the four second rollers 7 are at the same horizontal height, and the horizontal height of the bottom ends of the two first rollers 5 and the four second rollers 7 are lower than the bottom of the connecting plate 3, so that the first rollers 5 and the four second rollers 7 can press the materials normally.

[0023] In addition, the teeth of the first tooth groove 13 are located on one side of its inner wall, and the side wall of the gear 17 is meshed with the teeth on one side of the inner wall of the first tooth groove 13. By turning the adjusting bolt 16, the gear 17 is driven to mesh and rotate with the first tooth groove 13, thereby driving the connecting rod 10 to move up and down in the rod groove 9.

[0024] In addition, teeth are provided on the side of the limit block 21 away from the bolt 20, and the teeth on the side of the limit block 21 can engage with the teeth on the inner wall of the second tooth groove 18. Through the engagement of the limit block 21 with the second tooth groove 18, the position of the connecting rod 10 in the rod groove 9 can be fixed, thereby fixing the position of the connecting plate 3 in the bottom plate groove 2 of the presser foot 1.

[0025] In addition, a groove 22 is provided on the side of the limit block 21 away from its teeth, and a second bearing 23 is fixedly installed in the groove 22. One end of the bolt 20 is fixedly connected to the inner ring wall of the second bearing 23, so that the bolt 20 can rotate on the side of the limit block 21 and drive the limit block 21 to move left and right in the second tooth groove 18, thereby realizing the engagement between the side teeth of the limit block 21 and the second tooth groove 18.

[0026] In addition, sliding grooves 11 are provided at the bottom and bottom of the inner walls of the rod groove 9, and sliders 12 are fixedly installed at the top and bottom of both sides of the connecting rod 10, and the sliders 12 on both sides of the connecting rod 10 are respectively located in the corresponding sliding grooves 11 and can slide therein. With the cooperation of the sliders 12 and the sliding grooves 11, the contact area between the side walls of the connecting rod 10 and the inner walls of the rod groove 9 can be reduced, so that the connecting rod 10 can move up and down smoothly in the rod groove 9.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A roller presser foot for a sewing machine, comprising a presser foot (1), characterized in that: A vertical connecting column (8) is fixedly installed on the top of the presser foot (1), a U-shaped plate groove (2) is provided at the bottom of the presser foot (1), a rod groove (9) connected to the bottom of the presser foot (1) is provided inside the connecting column (8), a connecting plate (3) adapted to the plate groove (2) is movably installed, a connecting rod (10) inserted into the rod groove (9) is fixedly installed on the top of the connecting plate (3), a first tooth groove (13) is provided at the middle position of the right side wall of the connecting rod (10), a through hole (14) connected to the rod groove (9) is provided on the right side of the connecting column (8), a first bearing (15) is fixedly installed in the through hole (14), an adjusting bolt (16) is fixedly inserted between the inner ring walls of the first bearing (15), and the adjusting bolt (16) is fixedly inserted between the inner ring walls of the first bearing (15). A gear (17) meshingly connected with the first tooth groove (13) is fixedly installed at one end of the connecting rod (10), a second tooth groove (18) is opened at the middle position of the left side wall of the connecting rod (10), a screw hole (19) connected with the rod groove (9) is opened on the left side of the connecting column (8), a bolt (20) is threadedly inserted in the screw hole (19), and a limit block (21) meshingly connected with the second tooth groove (18) is rotatably installed at one end of the bolt (20), a first wheel groove (4) is opened at the bottom of the horizontal part of the connecting plate (3), two first rollers (5) are rotatably installed in the first wheel groove (4), and second wheel grooves (6) are opened at the bottom of the two vertical parts of the connecting plate (3), and two second rollers (7) are rotatably installed in each second wheel groove (6).

2. The roller presser foot of a sewing machine according to claim 1, characterized in that: The bottom ends of the two first rollers (5) and the four second rollers (7) are all located at the same horizontal height, and the horizontal heights of the bottom ends of the two first rollers (5) and the four second rollers (7) are all lower than the bottom of the connecting plate (3).

3. The roller presser foot of a sewing machine according to claim 1, characterized in that: The teeth of the first tooth groove (13) are located on one side of the inner wall thereof, and the side wall of the gear (17) is meshedly connected with the teeth on one side of the inner wall of the first tooth groove (13).

4. The roller presser foot of a sewing machine according to claim 1, characterized in that: The limiting block (21) is provided with teeth on a side away from the bolt (20), and the teeth on the side surface of the limiting block (21) can be engaged with the teeth on the inner wall of the second tooth groove (18).

5. The roller presser foot of a sewing machine according to claim 1, characterized in that: A groove (22) is provided on the side of the limit block (21) away from the teeth thereof, a second bearing (23) is fixedly installed in the groove (22), and one end of the bolt (20) is fixedly connected to the inner ring wall of the second bearing (23).

6. The roller presser foot of a sewing machine according to claim 1, characterized in that: The bottom and the bottom of both sides of the inner wall of the rod groove (9) are provided with sliding grooves (11), and the top and the bottom of both sides of the connecting rod (10) are fixedly installed with sliding blocks (12), and the sliding blocks (12) on both sides of the connecting rod (10) are respectively located in the corresponding sliding grooves (11) and can slide therein.

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