Driving and adjusting device of sewing machine

Abstract

The utility model discloses a sewing machine drive adjusting device which is installed on a sewing machine, and the sewing machine comprises a machine head, a platen, a machine frame, a belt pulley, a belt, a crankshaft, a pedal and a connecting rod. Fixing plates are installed on the two sides of the machine frame respectively, a top plate and a bottom plate are installed at the tops and the bottoms of the fixing plates respectively, a rectangular sliding column is fixedly connected between the top plate and the bottom plate, and a sliding base connected with the rectangular sliding column in a sliding mode is arranged between the top plate and the bottom plate in a sliding mode. A U-shaped frame is fixedly connected between the two sliding seats, and the pedal is rotationally connected with the U-shaped frame; and a driving piece for driving the two sliding seats to synchronously ascend and a locking piece for fixing the positions of the sliding seats after the height of the pedal is adjusted are mounted on the rack. A user can adjust the height of the pedal according to the height requirement of the user so as to adapt to the use of the user, and the use universality of the sewing machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a driving and adjusting device for a sewing machine. Background Art

[0002] For civilian sewing machines, generally, the pedal is stepped on by foot, and then the rotation of the pulley is driven by the crank, and the rotation of the machine head is driven by the belt to perform sewing work.

[0003] However, the height of the pedal of the civilian sewing machines on the market at present is generally fixed, so it may not be convenient for operators of different heights to use. Content of the Utility Model

[0004] In order to solve at least one technical problem mentioned in the background art, the purpose of the utility model is to provide a driving and adjusting device for a sewing machine, so that the user can adjust the height of the pedal according to his own height needs to adapt to his own use, and the universality of the use of the sewing machine is improved.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A driving and adjusting device for a sewing machine is installed on the sewing machine. The sewing machine includes a machine head, a table board, a frame, a pulley, a belt, a crankshaft, a pedal, and a connecting rod. Fixed plates are respectively installed on both sides of the frame. A top plate and a bottom plate are respectively installed on the top and bottom of the fixed plate. A rectangular sliding column is fixedly connected between the top plate and the bottom plate. A sliding seat slidably connected to the rectangular sliding column is slidably arranged between the top plate and the bottom plate. A U-shaped frame is fixedly connected between the two sliding seats. The pedal is rotatably connected to the U-shaped frame. A driving member for driving the two sliding seats to rise synchronously and a locking member for fixing the position of the sliding seat after the pedal height is adjusted are installed on the frame.

[0007] Compared with the prior art, the beneficial effects of the utility model are:

[0008] Through the cooperation of the U-shaped frame, the sliding seat, the rectangular sliding column, the driving member and the locking member, the user can adjust the height of the pedal according to his own height needs to adapt to his own use, and the universality of the use of the sewing machine is improved.

[0009] Preferably, the driving member includes a rotating rod rotatably connected to the frame. Two winches are fixedly connected to the rotating rod. A connecting rope is fixedly connected to the winch. One end of the connecting rope away from the winch is fixedly connected to the middle of the top surface of the sliding seat.

[0010] Preferably, the top plate is provided with a through hole, and a fixed pulley in contact with the connecting rope is installed at the position of the through hole on the top of the top plate.

[0011] Preferably, the locking member includes a support plate, a connecting plate, a clamping block, a compression spring, and a first locking bolt. A plurality of V-shaped clamping grooves are evenly formed on one side of the rectangular sliding column close to the pedal. An installation groove is formed on one side of the sliding seat close to the pedal. The connecting plate is slidably connected in the installation groove. The clamping block is fixedly connected to the side of the connecting plate away from the pedal. The support plate is fixedly connected to the notch of the installation groove through a fixing screw. The first locking bolt is threadedly connected to the support plate, and one end of the first locking bolt extends into the installation groove and abuts against the connecting plate. One end of the compression spring is fixedly connected to the connecting plate, and the other end is fixedly connected to the support plate. The clamping block is clamped in the V-shaped clamping groove.

[0012] Preferably, there are multiple rectangular sliding columns between the top plate and the bottom plate.

[0013] Preferably, a plurality of clamping blocks are fixedly connected to each side of the connecting plate, and the plurality of clamping blocks are respectively clamped in a plurality of adjacent V-shaped clamping grooves.

[0014] Preferably, the connecting rod includes an outer tube rotatably connected to the pedal and an inner tube sleeved on the outer tube. The inner tube is rotatably connected to the crankshaft. A radial threaded hole is formed at the top of the outer tube, and a second locking bolt is threadedly connected in the threaded hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an isometric schematic diagram of the overall structure of the present invention;

[0016] Figure 2 is Figure 1 a schematic enlarged view of the structure at A in

[0017] Figure 3 is a front view schematic diagram of the overall structure of the present invention;

[0018] Figure 4 is Figure 3 a schematic cross-sectional view of the structure at B in

[0019] Figure 5 is an exploded schematic diagram of the locking member of the present invention.

[0020] In the figure: 10, machine head; 11, table board; 12, frame; 13, pulley; 14, belt; 15, crankshaft; 16, pedal; 17, connecting rod; 171, outer tube; 172, inner tube; 173, second locking bolt; 2, fixing plate; 31, top plate; 311, through hole; 312, fixed pulley; 32, bottom plate; 4, rectangular sliding column; 41, V-shaped clamping groove; 5, sliding seat; 51, installation groove; 6, U-shaped frame; 71, rotating rod; 72, winch; 73, connecting rope; 74, adjusting handle; 8, locking member; 81, support plate; 82, connecting plate; 83, clamping block; 84, compression spring; 85, first locking bolt; 9, fixing screw. Specific Embodiments

[0021] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than 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 efforts shall fall within the protection scope of the present utility model.

[0022] First, in order to reintroduce the design concept of this application, although there have been many updates and replacements in the types of existing industrial sewing machines, for some rural families, they still tend to use civilian sewing machines in terms of cost and usability. However, the overall height of the current civilian sewing machines and the installation height of the pedals are fixed at the time of factory shipment. Due to the differences in the heights of users, it may not be convenient for some users with relatively high or low heights during sewing.

[0023] Please refer to Figure 1 - Figure 5 , this embodiment provides a sewing machine driving and adjusting device, which is installed on a sewing machine. The sewing machine includes a machine head 10, a table board 11, a frame 12, a pulley 13, a belt 14, a crankshaft 15, a pedal 16, and a connecting rod 17. Specifically, the table board 11 is fixed on the frame 12, the machine head 10 is installed on the table board 11, the pulley 13 is rotatably connected to one side of the frame 12, and the pulley 13 is drivingly connected to the machine head 10 through the belt 14. The crankshaft 15 is fixed at the axis of the pulley 13. The pedal 16 is rotatably connected between the frames 12 and is located at the bottom of the frame 12. One end of the connecting rod 17 is rotatably connected to a side corner of the pedal 16 close to the pulley 13, and the other end of the connecting rod 17 is rotatably connected to the crankshaft 15. By stepping on the pedal 16, the machine head 10 will be driven to operate through the cooperation of the connecting rod 17, the crankshaft 15, the pulley 13, and the belt 14.

[0024] In order to adapt to users of different heights, in this application embodiment, fixing plates 2 are respectively installed on both sides of the frame 12, a top plate 31 and a bottom plate 32 are respectively installed on the top and bottom of the fixing plate 2, a rectangular sliding column 4 is fixedly connected between the top plate 31 and the bottom plate 32, and a sliding seat 5 slidably connected to the rectangular sliding column 4 is slidably arranged between the top plate 31 and the bottom plate 32. A U-shaped frame 6 is fixedly connected between the two sliding seats 5, and the pedal 16 is rotatably connected to the U-shaped frame 6. A driving member for driving the two sliding seats 5 to rise synchronously is installed on the frame 12. After the height of the pedal 16 is adjusted, a locking member 8 is used to fix the position of the sliding seat 5 relative to the rectangular sliding column 4.

[0025] Specifically, the driving member includes a rotating rod 71 rotatably connected to the frame 12. Two winches 72 are fixedly connected to the rotating rod 71. A connecting rope 73 is fixedly connected to the winch 72. One end of the connecting rope 73 away from the winch 72 is fixedly connected to the middle of the top surface of the sliding seat 5. It should be noted here that the two winches 72 are exactly the same. When the two winches 72 rotate synchronously by the same number of turns, the two sliding seats 5 on both sides of the frame 12 rise or fall by the same height. Further, in order to facilitate the operation of the rotating rod 71, an adjusting handle 74 is installed at the end of the rotating rod 71.

[0026] The following is a further introduction in combination with a specific usage scenario. When the user feels that the foot pedal 16 of the sewing machine is too high or too low and it is inconvenient to use, the pedal 16 can be adjusted according to the actual situation. Specifically: If the height of the pedal 16 is too low, first unlock the locking member 8 that fixes the relative positions of the sliding seat 5 and the rectangular sliding seat, and then drive the rotating rod 71 to rotate by rotating the adjusting handle 74, further driving the two winches 72 to rotate synchronously, so that the two connecting ropes 73 are wound simultaneously, thereby pulling the two sliding seats 5 to rise synchronously. In this way, the pedal 16 can be driven to rise. When the pedal 16 rises to a suitable height, use the locking member 8 to lock the position of the sliding seat 5 to ensure that the height of the pedal 16 remains stable, and then the sewing machine can be used.

[0027] If the height of the pedal 16 is too high, the user can step on the pedal 16 with their foot or press down the pedal 16 in other ways to make the pedal 16 descend after unlocking the locking member 8 until the height of the pedal 16 is suitable for the user. Then, the locking member 8 can be used to lock the height position of the sliding seat 5 relative to the rectangular sliding column 4. Finally, the sewing machine can be used.

[0028] Overall, through the cooperation of the U-shaped frame 6, the sliding seat 5, the rectangular sliding column 4, the driving member and the locking member 8 in this application, the user can adjust the height of the pedal 16 according to their own height needs to suit their use, improving the versatility of the sewing machine.

[0029] Refer to Figure 1 and Figure 2 As a specific implementation manner of the embodiment of the present application, a through hole 311 is opened in the middle of the top plate 31, and a fixed pulley 312 is installed at the position of the through hole 311 on the top of the top plate 31. The connecting rope 73 passes through the through hole 311 and abuts against the wheel surface of the fixed pulley 312.

[0030] Combined with the specific usage scenario, a through hole 311 is opened in the middle of the top plate 31, which can ensure that the connecting rope 73 from the top plate 31 to the sliding seat 5 always maintains a state perpendicular to the top surface of the sliding seat 5. Furthermore, it can make the pulling force on the sliding seat 5 always perpendicular to the top surface of the sliding seat 5. The use of the fixed pulley 312 is to ensure that the connecting rope 73 does not have a sliding friction with the top plate 31, but the connecting rope 73 directly has a rolling friction with the fixed pulley 312 after passing through the through hole 311, which can generally improve the labor-saving performance of the height adjustment of the pedal 16.

[0031] Referring to Figure 3 - Figure 5 , as a specific implementation manner of the embodiment of the present application, the locking member 8 includes a support plate 81, a connecting plate 82, a clamping block 83, a compression spring 84, and a first locking bolt 85. A plurality of V-shaped clamping grooves 41 are evenly opened on one side of the rectangular sliding column 4 close to the pedal 16. An installation groove 51 is opened on one side of the sliding seat 5 close to the pedal 16. The connecting plate 82 is slidably connected in the installation groove 51. The clamping block 83 is fixedly connected to the side of the connecting plate 82 facing away from the pedal 16. The support plate 81 is fixedly connected to the notch of the installation groove 51 by a fixing screw. The first locking bolt 85 is threadedly connected to the support plate 81 and one end of the first locking bolt 85 extends into the installation groove 51 and abuts against the connecting plate 82. One end of the compression spring 84 is fixedly connected to the connecting plate 82 and the other end is fixedly connected to the support plate 81. In addition, the clamping block 83 is clamped in the V-shaped clamping groove 41.

[0032] Combined with a specific usage scenario, when it is necessary to release the position lock of the sliding seat 5, the first locking bolt 85 needs to be loosened. At this time, under the elastic force of the compression spring 84, the block 83 still engages with the V-shaped card slot 41, and the pedal 16 does not fall; then, according to the actual situation, when the height of the pedal 16 is too low, the sliding seat 5 is controlled to rise by rotating the rotating rod 71 to increase the height of the pedal 16; when the height of the pedal 16 is too high, a downward force is applied to the pedal 16 by stepping on the pedal 16 to reduce the overall height of the pedal 16, the sliding seat 5, and the U-shaped frame 6; during the height adjustment of the pedal 16, the sliding seat 5 is in a synchronous rising (or falling) state. At this time, the block 83 will gradually move outward along the groove wall of the V-shaped card slot 41, further compressing the compression spring 84. When the block 83 transitions to the next V-shaped card slot 41, the block 83 will be snapped into the next V-shaped card slot 41 under the elastic force of the compression spring 84. When the sliding seat 5 continues to move, the block 83 will continue to transition from one V-shaped card slot 41 and snap into the next V-shaped card slot 41 until the pedal 16 is adjusted to the appropriate height, and the block 83 snaps into the corresponding V-shaped card slot 41 at this time. Two points need to be explained here: Firstly, the reason for using the V-shaped card slot 41 is that when the sliding seat 5 rises and falls, the block 83 transitions from one V-shaped card slot 41 to another in the same way; Secondly, when the height position of the pedal 16 is adjusted, only relying on the elastic force of the compression spring 84 makes the block 83 engage with the V-shaped card slot 41. At this time, the overall position of the sliding seat 5 and the pedal 16 is not locked. Furthermore, after the height position of the pedal 16 is adjusted, by tightening the first locking bolt 85, the block 83 is firmly abutted against the V-shaped card slot 41, thereby ensuring the temperature of the pedal 16 height and further ensuring the use stability of the sewing machine.

[0033] Further, referring to Figure 4 , a plurality of blocks 83 are fixedly connected to the side surface of each connecting plate 82, and the plurality of blocks 83 are respectively engaged with a plurality of adjacent V-shaped card slots 41.

[0034] In this way, the cooperation of the plurality of blocks 83 and the V-shaped card slots 41 is equivalent to increasing the contact area between the sliding seat 5 and the rectangular sliding column, which can ensure that the position of the sliding seat 5 is fixed more firmly, and then the position of the pedal 16 after adjusting the height can be relatively stable, further ensuring the stability and reliability of the sewing machine during use.

[0035] Further, referring to Figure 1 and Figure 5, there are multiple rectangular sliding columns 4 between the top plate 31 and the bottom plate 32. By using the multiple rectangular sliding columns 4, the opening positions of the V-shaped card slots 41 and the number of the corresponding clamping blocks 83 can be further increased. Furthermore, it is equivalent to further increasing the connection area between the sliding seat 5 and the rectangular sliding column 4, improving the locking stability of the sliding seat 5, and then enhancing the stability of the position of the pedal 16, thus ensuring the use stability of the sewing machine.

[0036] Referring to Figure 3 , as a specific implementation manner of the embodiment of the present application, the connecting rod 17 includes an outer tube 171 rotatably connected to the pedal 16 and an inner tube 172 sleeved on the outer tube 171. The inner tube 172 is rotatably connected to the crankshaft 15. A radial threaded hole is formed in the circumferential side surface of the outer tube 171, and a second locking bolt 173 is threadedly connected in the threaded hole.

[0037] Combined with the specific use scenario, when it is necessary to adjust the height of the pedal 16, the first locking bolt 85 needs to be loosened and the second locking bolt 173 also needs to be loosened. Then, with the adjustment of the height of the pedal 16, the inner tube 172 will extend out of or retract into the outer tube 171. After the pedal 16 is adjusted to the appropriate height, the first locking bolt 85 needs to be tightened and the second locking bolt 173 also needs to be tightened. It should be noted here that the connecting rod 17 can also be realized by using a single through rod for the height adjustment of the pedal 16, but the adjustment range of the height is relatively small. By using the telescopic outer tube 171 and inner tube 172 for the connecting rod 17 and using the second locking bolt 173 to relatively fix the inner tube 172 and the outer tube 171, the height adjustment range of the pedal 16 can be increased.

[0038] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A sewing machine drive adjustment device is installed on a sewing machine, and the sewing machine includes a machine head (10), a table board (11), a machine frame (12), a pulley (13), a belt (14), a crankshaft (15), a pedal (16), and a connecting rod (17); it is characterized in that, Fixed plates (2) are respectively installed on both sides of the frame (12). A top plate (31) and a bottom plate (32) are respectively installed at the top and bottom of the fixed plate (2). A rectangular sliding column (4) is fixedly connected between the top plate (31) and the bottom plate (32). A sliding seat (5) slidably connected to the rectangular sliding column (4) is slidably arranged between the top plate (31) and the bottom plate (32); a U-shaped frame (6) is fixedly connected between the two sliding seats (5). The pedal (16) is rotatably connected to the U-shaped frame (6); a driving member for driving the two sliding seats (5) to rise synchronously and a locking member (8) for fixing the position of the sliding seat (5) after the height of the pedal (16) is adjusted are installed on the frame (12).

2. The sewing machine drive adjustment device according to claim 1, characterized in that, The driving member includes a rotating rod (71) rotatably connected to the frame (12). Two winches (72) are fixedly connected to the rotating rod (71). A connecting rope (73) is fixedly connected to the winch (72). One end of the connecting rope (73) away from the winch (72) is fixedly connected to the middle of the top surface of the sliding seat (5).

3. The sewing machine drive adjustment device according to claim 2, wherein, The top plate (31) is provided with a through hole (311). A fixed pulley (312) in contact with the connecting rope (73) is installed at the top of the top plate (31) at the position of the through hole (311).

4. The sewing machine drive adjustment device according to claim 3, characterized in that The locking member (8) includes a support plate (81), a connecting plate (82), a clamping block (83), a compression spring (84), and a first locking bolt (85). A plurality of V-shaped clamping grooves (41) are uniformly opened on one side of the rectangular sliding column (4) close to the pedal (16). An installation groove (51) is opened on one side of the sliding seat (5) close to the pedal (16). The connecting plate (82) is slidably connected in the installation groove (51). The clamping block (83) is fixedly connected to the side of the connecting plate (82) away from the pedal (16). The support plate (81) is fixedly connected to the notch of the installation groove (51) by a fixing screw (9). The first locking bolt (85) is threadedly connected to the support plate (81), and one end of the first locking bolt (85) extends into the installation groove (51) and abuts against the connecting plate (82). One end of the compression spring (84) is fixedly connected to the connecting plate (82), and the other end is fixedly connected to the support plate (81). The clamping block (83) is clamped in the V-shaped clamping groove (41).

5. A sewing machine drive adjustment device according to claim 4, characterized in that, A plurality of clamping blocks (83) are fixedly connected to the side surface of each connecting plate (82), and the plurality of clamping blocks (83) are respectively clamped in a plurality of adjacent V-shaped clamping grooves (41).

6. A sewing machine drive adjustment device according to claim 1, characterized in that, There are a plurality of rectangular sliding columns (4) between the top plate (31) and the bottom plate (32).

7. A sewing machine drive adjustment device according to claim 1, characterized in that, The connecting rod (17) includes an outer tube (171) rotatably connected to the pedal (16) and an inner tube (172) sleeved on the outer tube (171). The inner tube (172) is rotatably connected to the crankshaft (15). A radial threaded hole is opened at the top of the outer tube (171). A second locking bolt (173) is threadedly connected in the threaded hole.

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