阅读说明：本技术 平缝机的牙架高度调节机构 (Tooth rack height adjusting mechanism of lockstitch sewing machine ) 是由 邱志伟 洪志敏 管建平 邱士兵 于 2019-03-29 设计创作，主要内容包括：本发明涉及一种平缝机的牙架高度调节机构,利用本发明的一种平缝机的牙架高度调节机构调节牙架高度时,通过旋转所述调节架而使调节架上的插销插在不同的调节孔中,就可以使得第一偏心销旋转,从而使得第二段销在滑块中旋转,第二段销旋转可以使得第一段销将送料牙架顶起或者落下一定高度,这样就能够方便地调节平缝机的牙架高度来适应不同的布料厚度。由此可见,本发明的一种平缝机的牙架高度调节机构能够方便地调节牙架高度,结构简单,使用方便。(When the fixture height adjusting mechanism of the flat sewing machine is used for adjusting the height of the fixture, the adjusting frame is rotated to enable the inserted pin on the adjusting frame to be inserted into different adjusting holes, so that the first eccentric pin can be rotated, the second pin can be rotated in the sliding block, the second pin can be rotated to enable the first pin to jack up or drop the feeding fixture to a certain height, and the fixture height of the flat sewing machine can be conveniently adjusted to adapt to different cloth thicknesses. Therefore, the tooth rack height adjusting mechanism of the flush joint machine can conveniently adjust the height of the tooth rack, and is simple in structure and convenient to use.)

1. A tooth rack height adjusting mechanism of a flush joint machine comprises a feeding crank arm (3), a tooth lifting crank arm (4) and a feeding tooth rack (5), wherein the feeding crank arm (3) is driven by a feeding shaft (1) to rotate back and forth, and the tooth lifting crank arm (4) is driven by a tooth lifting shaft (2) to rotate back and forth;

the first end of the feeding tooth rack (5) is connected with a first eccentric pin (6), the first eccentric pin (6) comprises a first section pin (7) and a second section pin (8) which are eccentrically arranged, the first end of the feeding tooth rack (5) is hinged to the first section pin (7), and the second section pin (8) is hinged to a sliding block (9); the tooth lifting crank arm (4) is provided with a sliding groove (10), and the sliding block (9) is connected in the sliding groove (10) in a sliding manner; the second end of the feeding tooth rack (5) is connected with the feeding crank arm (3);

first section round pin (7) and an alignment jig (11) fixed connection are connected with a but axial sliding's bolt (12) on alignment jig (11), still be equipped with a plurality of regulation holes (13) on pay-off dental articulator (5), rotate alignment jig (11) can be adjusted bolt (12) to adjusting to with arbitrary one regulation hole (13) coaxial alignment, bolt (12) can be inserted rather than in the coaxial regulation hole (13) of aiming at.

2. The dental articulator height adjustment mechanism of a flush joint machine of claim 1, further comprising: the adjusting frame (11) comprises a first arm (14) and a second arm (15) which are arranged oppositely, the rear end of the bolt (12) penetrates through the first arm (14), the front end of the bolt (12) penetrates through the second arm (15) and is inserted into an adjusting hole (13), an adjusting pull plate (16) is fixedly connected onto the bolt (12), the adjusting pull plate (16) is located between the first arm (14) and the second arm (15), a compression spring (17) is further sleeved onto the bolt (12), one end of the compression spring (17) abuts against the adjusting pull plate (16), and the other end of the compression spring abuts against the first arm (14).

3. The dental articulator height adjustment mechanism of a flush joint machine of claim 1, further comprising: the part of the first section pin (7) connected with the feed tooth rack (5) is provided with a first grease storage hole (19) for storing lubricating grease.

4. The dental articulator height adjustment mechanism of a flush joint machine of claim 1, further comprising: and a second grease storage hole (20) for storing lubricating grease is formed in the second section pin (8).

5. The dental articulator height adjustment mechanism of a flush joint machine of claim 1, further comprising: the adjusting frame (11) is provided with a first pin hole (21), the first section of pin (7) is inserted into the first pin hole (21), the adjusting frame (11) is screwed with a first tightening screw (22), and the end part of the first tightening screw (22) is pressed against the side wall of the first section of pin (7) to compress the first section of pin (7) in the pin hole.

6. The dental articulator height adjustment mechanism of a flush joint machine of claim 5, further comprising: the end of the first section of pin (7) is provided with a first connecting groove (23) for connecting with a straight screwdriver.

7. The dental articulator height adjustment mechanism of a flush joint machine of claim 1, further comprising: the second end and the pay-off turning arm (3) of pay-off dental articulator (5) are connected through second eccentric round pin (24), are equipped with second pinhole (25) on pay-off turning arm (3), second eccentric round pin (24) have linkage segment (26) and eccentric section (27), in second pinhole (25) in pay-off turning arm (3) are connected in linkage segment (26), it is equipped with second tightening screw (29) to screw up on pay-off turning arm (3), and the tip top of second tightening screw (29) compresses tightly linkage segment (26) in second pinhole (25) of pay-off turning arm (3) on the lateral wall of linkage segment (26), eccentric section (27) are connected with pay-off dental articulator (5) are articulated.

8. The dental articulator height adjustment mechanism of a flush joint machine of claim 7, further comprising: the end of the connecting section (26) is provided with a second connecting groove (30) for connecting with a straight screwdriver.

9. The dental articulator height adjustment mechanism of a flush joint machine of claim 7, further comprising: the eccentric section (27) is provided with a third grease storage hole (31) for storing grease.

Technical Field

The invention relates to a tooth frame height adjusting mechanism of a flush joint machine.

Background

The lockstitch machine is different to cloth thickness, need have different tooth height adaptation pay-off effects, it needs to adopt different tooth height to make up thin material series and thick material series lockstitch machine, meet different thickness sewing material in the user uses, it obtains different tooth height also to need to adjust feed lifting fork angle sometimes, but accommodation process is not meticulous, difficult handle accuse when feed lifting fork angle changes, feed lifting fork screw appears not reaching the ideal angle because of manual shake during locking, the screw of pretension is twisted motionless, easily appear after the adjustment screw locking not in place and feed lifting fork aversion leads to not reaching the condition of the required pay-off tooth of customer.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a fixture height adjusting mechanism of a lockstitch machine, which can conveniently adjust the height of a fixture of the lockstitch machine.

In order to achieve the purpose, the invention provides a tooth rack height adjusting mechanism of a flat sewing machine, which adopts the following technical scheme: a tooth rack height adjusting mechanism of a flush joint machine comprises a feeding crank arm, a tooth lifting crank arm and a feeding tooth rack, wherein the feeding crank arm is driven by a feeding shaft to rotate back and forth, and the tooth lifting crank arm is driven by the tooth lifting shaft to rotate back and forth;

the first end of the feeding tooth rack is connected with a first eccentric pin which comprises a first section pin and a second section pin which are arranged eccentrically, the first end of the feeding tooth rack is hinged on the first section pin, and the second section pin is hinged on a sliding block; the tooth lifting crank arm is provided with a sliding groove, and the sliding block is connected in the sliding groove in a sliding manner; the second end of the feeding tooth rack is connected with the feeding crank arm;

but first section round pin and an alignment jig fixed connection are connected with an axially sliding's bolt on the alignment jig, still be equipped with a plurality of regulation holes on the pay-off dental frame, rotate the alignment jig can be adjusted the bolt to with arbitrary one regulation hole coaxial alignment, the bolt can be inserted rather than in the coaxial regulation hole of aiming at.

Preferably, the adjusting bracket comprises a first arm and a second arm which are oppositely arranged, the rear end of the bolt penetrates through the first arm, the front end of the bolt penetrates through the second arm and is inserted into an adjusting hole, an adjusting pulling plate is fixedly connected to the bolt and located between the first arm and the second arm, a compression spring is further sleeved on the bolt, one end of the compression spring abuts against the adjusting pulling plate, and the other end of the compression spring abuts against the first arm.

Preferably, the part of the first section pin connected with the feed tooth rack is provided with a first grease storage hole for storing lubricating grease.

Preferably, the second pin section is provided with a second grease storage hole for storing grease.

Preferably, the adjusting frame is provided with a first pin hole, the first section pin is inserted into the first pin hole, the adjusting frame is screwed with a first tightening screw, and the end of the first tightening screw is pressed against the side wall of the first section pin to press the first section pin in the pin hole.

More preferably, the end of the first section of pin is provided with a first connecting groove for connecting with a straight screwdriver.

Preferably, the second end of pay-off dental articulator passes through the eccentric round pin of second with the pay-off turning arm and is connected, is equipped with the second pinhole on the pay-off turning arm, the eccentric round pin of second has linkage segment and eccentric section, the linkage segment is connected in the second pinhole of pay-off turning arm, screw up on the pay-off turning arm and be equipped with the second puller screw, the tip top of second puller screw is on the lateral wall of linkage segment and compresses tightly the linkage segment in the second pinhole of pay-off turning arm, eccentric section is connected with pay-off dental articulator.

More preferably, the end of the connecting section is provided with a second connecting groove for connecting with a straight screwdriver.

Preferably, the eccentric section is provided with a third grease storage hole for storing grease.

As mentioned above, the tooth frame height adjusting mechanism of the flat sewing machine has the following beneficial effects: when the tooth rack height adjusting mechanism of the flat sewing machine is used for adjusting the height of the tooth rack, the adjusting rack is rotated to enable the inserted pin on the adjusting rack to be inserted into different adjusting holes, so that the first eccentric pin can be rotated, the second pin can be rotated in the sliding block, the first pin can jack up or fall down the feeding tooth rack to a certain height through the rotation of the second pin, and the tooth rack height of the flat sewing machine can be conveniently adjusted to adapt to different cloth thicknesses. Therefore, the tooth rack height adjusting mechanism of the flush joint machine can conveniently adjust the height of the tooth rack, and is simple in structure and convenient to use.

Drawings

FIG. 1 is a perspective view of a fixture height adjusting mechanism of a flat sewing machine according to the present invention.

FIG. 2 is a perspective view of another viewing angle of the tooth frame height adjusting mechanism of the flat sewing machine of the present invention.

FIG. 3 is a perspective view of a dental articulator height adjustment mechanism of a lockstitch machine of the present invention, viewed from below.

Fig. 4 is an enlarged structural schematic diagram of the joint of the tooth lifting crank arm and the feeding tooth rack.

Fig. 5 is a schematic perspective view of the feed dog.

Fig. 6 is a perspective view of the first eccentric pin.

Fig. 7 is a perspective view of the second eccentric pin.

Description of the element reference numerals

1 feeding shaft

2 lifting tooth shaft

3 feeding crank arm

4 lifting tooth crank arm

5 feeding tooth rack

6 first eccentric pin

7 first section pin

8 second section pin

9 sliding block

10 chute

11 adjusting rack

12 bolt

13 adjusting hole

14 first arm

15 second arm

16 adjustable spanner plate

17 compression spring

18 feed dog

19 first grease storage hole

20 second grease storage hole

21 first pin hole

22 first tightening screw

23 first connecting groove

24 second eccentric pin

25 second pin hole

26 connecting segment

27 eccentric section

28 first connecting hole

29 second tightening screw

30 second connecting groove

31 third grease storage hole

32 second connection hole

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1 to 3, the invention provides a tooth rack height adjusting mechanism of a lockstitch sewing machine, which comprises a feeding crank arm 3, a tooth lifting crank arm 4 and a feeding tooth rack 5, wherein the feeding crank arm 3 is driven by a feeding shaft 1 to rotate back and forth, and the tooth lifting crank arm 4 is driven by a tooth lifting shaft 2 to rotate back and forth; the feeding shaft 1 and the feed lifting shaft 2 are driven by a driving mechanism respectively to rotate, the feeding shaft 1 rotates to drive the feeding crank arm 3 to push the feeding tooth rack 5 to reciprocate mainly in the horizontal direction, and a sliding block 9 connected with the first end of the feeding tooth rack 5 slides in a sliding groove 10 of the feed lifting crank arm 4; when the feed lifting tooth shaft 2 rotates, the sliding groove 10 can drive the sliding block 9 to ascend or descend mainly in the vertical direction, so that the feed feeding tooth rack 5 is driven to do ascending and descending motion. The first end of the feeding tooth rack 5 is connected with a first eccentric pin 6, the first eccentric pin 6 comprises a first section pin 7 and a second section pin 8 which are eccentrically arranged with each other, the first end of the feeding tooth rack 5 is hinged on the first section pin 7, and the second section pin 8 is hinged on a sliding block 9; the tooth lifting crank arm 4 is provided with a sliding groove 10, and the sliding block 9 is connected in the sliding groove 10 in a sliding manner; the second end of the feeding tooth rack 5 is hinged with the feeding crank arm 3; an adjusting frame 11 is fixed on the first section pin 7, a bolt 12 capable of axially sliding is connected to the adjusting frame 11, a plurality of adjusting holes 13 are further formed in the feeding tooth frame 5, the bolt 12 can be adjusted to be coaxially aligned with any one of the adjusting holes 13 by rotating the adjusting frame 11, and the bolt 12 can be inserted into the adjusting hole 13 coaxially aligned with the bolt 12.

Referring to fig. 1 to 3, when the height of the tooth rack is adjusted by using the tooth rack height adjusting mechanism of the flat sewing machine of the invention, the adjusting rack 11 is rotated to insert the pin 12 on the adjusting rack 11 into different adjusting holes 13, so that the first eccentric pin 6 can be rotated, the second pin 8 can be rotated in the slide block 9 and drive the slide block 9 to slide along the slide slot 10 on the tooth lifting crank arm 4, the second pin 8 can be rotated to enable the first pin 7 to jack up or drop the feed tooth rack 5 by a certain height, and the feed tooth 18 is connected to the feed tooth rack 5, so that the height of the feed tooth 18 of the flat sewing machine can be conveniently adjusted to adapt to different cloth thicknesses. Therefore, the tooth rack height adjusting mechanism of the flush joint machine can conveniently adjust the height of the tooth rack, and is simple in structure and convenient to use.

In the tooth rack height adjusting mechanism of the flat sewing machine, the bolt 12 is inserted into different adjusting holes 13 to adjust the feeding tooth rack 5 to different height positions, each adjusting hole 13 corresponds to a set height position of the feeding tooth rack 5, the number of the adjusting holes 13 can be arranged on the feeding tooth rack 5 according to actual requirements, the distance between the axis of each adjusting hole 13 and the axis of the first section pin 7 is equal to the distance between the axis of the bolt 12 and the axis of the first section pin 7, and therefore, when the adjusting rack 11 rotates around the first section pin 7, the bolt 12 can rotate to the position coaxially aligned with the adjusting holes 13.

In order to make the feed dog 18 parallel to the plane of the needle plate (not shown in the figures) of the sewing machine, as a preferred embodiment, please refer to fig. 1 and 7 in combination, the second end of the feed dog frame 5 is connected with the feed crank arm 3 through a second eccentric pin 24, the second eccentric pin 24 has a connecting section 26 and an eccentric section 27, the connecting section 26 is connected with the feed crank arm 3, the feed crank arm 3 is provided with a second pin hole 25, the connecting section 26 is connected in the second pin hole 25 of the feed crank arm 3, the feed crank arm 3 is screwed with a second tightening screw 29, and the end of the second tightening screw 29 is pressed against the side wall of the connecting section 26 to press the connecting section 26 in the second pin hole 25 of the feed crank arm 3. The eccentric section 27 is hinged to the feed dog frame 5, as shown in fig. 5, a first connecting hole 28 is formed in the feed dog frame 5, and the eccentric section 27 is in running fit with the first connecting hole 28.

Thus, the height position of the second end of the feed dog frame 5 can be adjusted by adjusting the phase of the connecting section 26 of the second eccentric pin 24 in the second pin hole 25 of the feed crank arm 3, so that the feed dog 18 on the feed dog frame 5 is adjusted to be parallel to the needle plate of the sewing machine, when the phase of the connecting section 26 in the second pin hole of the feed crank arm 3 is adjusted, the second tightening screw 29 is loosened, and the second tightening screw 29 is tightened after the connecting section 26 is rotated to a set position, so that the second eccentric pin 24 is tightly pressed and fixed in the second pin hole 25 of the feed crank arm 3. In a preferred embodiment, as shown in fig. 3, the feeding crank arm 3 is screwed with a second eccentric pin 24 for facilitating the rotation thereof, and as shown in fig. 6, the end of the connecting section 26 is provided with a second connecting groove 30 for connecting with a "straight" screwdriver.

In the tooth rack height adjusting mechanism of a flat sewing machine of the invention, the height position of the feeding tooth rack 5 can be adjusted by rotating the adjusting rack 11, the bolt 12 on the adjusting rack 11 can be inserted into the adjusting hole 13 on the feeding tooth rack 5, as a preferred embodiment, as shown in fig. 4, the adjusting rack 11 comprises a first arm 14 and a second arm 15 which are oppositely arranged, the rear end of the bolt 12 passes through the first arm 14, the front end of the bolt 12 passes through the second arm 15 and is inserted into one adjusting hole 13, the bolt 12 is fixedly connected with an adjusting spanner 16, the adjusting spanner 16 is positioned between the first arm 14 and the second arm 15, the bolt 12 is also sleeved with a compression spring 17, one end of the compression spring 17 is abutted against the adjusting spanner 16, and the other end is abutted against the first arm 14. Thus, under the action of the compression spring 17, the bolt 12 can be guaranteed to be pressed into the adjusting hole 13, when the bolt 12 needs to be pulled out, the adjusting spanner 16 is manually pushed towards the rear end of the bolt 12 to compress the compression spring 17, so that the bolt 12 is pulled out of the adjusting hole 13, then when the adjusting spanner 16 is rotated, when the bolt 12 is rotated to be aligned with another adjusting hole 13, the adjusting spanner 16 is released, and under the action of the compression spring 17, the bolt 12 can be pressed into the adjusting hole 13.

As shown in fig. 4, the first segment pin 7 of the first eccentric pin 6 passes through the hole of the feed dog 5 to be rotatably engaged with the feed dog 5, and in order to enable the first segment pin 7 to flexibly rotate in the hole of the feed dog 5, as shown in fig. 6, a first grease storage hole 19 for storing grease is formed in a portion of the first segment pin 7 connected with the feed dog 5, as shown in fig. 5, a second connection hole 32 is formed in the feed dog 5, and the first segment pin 7 is rotatably engaged with the second connection hole 32. When the feed dog 5 rotates relative to the first section pin 7, grease in the first grease storage hole 19 can gradually infiltrate between the first section pin 7 and the second connecting hole 32 on the feed dog 5 to provide lubrication. As shown in fig. 2, the second pin segment 8 of the first eccentric pin 6 is hinged to the sliding block 9, a hole which is rotatably matched with the second pin segment 8 is formed in the sliding block 9, and in order to enable the second pin segment 8 to flexibly rotate in the hole of the sliding block 9, as shown in fig. 6, a second grease storage hole 20 for storing grease is formed in the second pin segment 8, and the grease stored in the second grease storage hole 20 can provide lubrication for the second pin segment 8. As shown in fig. 7, the eccentric section 27 is provided with a third grease storage hole 31 for storing grease, referring to fig. 5, the first connection hole 28 of the feed dog 5 is rotatably engaged with the eccentric section 27 of the second eccentric pin 24, and the grease stored in the third grease storage hole 31 can provide lubrication for the eccentric section 27.

In the dental articulator height adjusting mechanism of a flush joint machine of the present invention, the adjusting bracket 11 is fixedly connected to the first segment pin 7, the adjusting bracket 11 can be driven to rotate by rotating the adjusting wrench plate 16, so as to drive the first eccentric pin 6 to rotate, as shown in fig. 3, the adjusting bracket 11 is provided with a first pin hole 21, the first segment pin 7 is inserted into the first pin hole 21, the initial height position of the second segment pin 8 can be adjusted by adjusting the initial phase of the first segment pin 7 in the first pin hole 21 of the adjusting bracket 11, so as to adjust the initial height position of the feed dental articulator 5, in order to adjust the initial phase of the first segment pin 7 in the first pin hole 21, as a preferred embodiment, the adjusting bracket 11 is screwed with a tightening screw, the end of the first tightening screw 22 is pressed in the pin hole by abutting against the side wall of the first segment pin 7, after the initial phase of the first segment pin 7 in the first pin hole 21 is adjusted, the first puller screw 22 is tightened to compress the first segment pin 7 in the first pin hole 21. In order to facilitate the rotation of the first eccentric pin 6, as shown in fig. 4, the end of the first segment pin 7 is provided with a first coupling groove 23 for coupling with a "straight" screwdriver.

Based on the technical scheme, the feed dog height adjusting mechanism of the flat sewing machine can conveniently adjust the height of the feed dog 5 of the sewing machine, so that the height of the feed dog can be adjusted to adapt to different cloth thicknesses, and the flat sewing machine is simple in structure and convenient to use.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.