CN217600982U - Electronic rear tug device and sewing machine - Google Patents

Abstract

The utility model provides an electronic rear tug device and a sewing machine, which comprises a presser foot pressing rod, a presser foot and a rear tug, wherein the presser foot is connected below the presser foot pressing rod; the presser foot handle is provided with a presser foot handle raised head, the base is provided with a base raised head, the base raised head is sleeved on the presser foot pressure rod and is arranged on the upper side of the presser foot handle raised head, and a gap is formed between the presser foot handle raised head and the base raised head. The utility model relates to an electronic rear tug device, which saves a driving source for lifting and pressing the rear tug and reduces the production cost; meanwhile, when the thickness of the sewing material changes, the height of the rear tug can be adjusted, the sewing material is effectively prevented from being accumulated between the presser foot and the rear tug, and the sewing quality of the sewing material is ensured.

Description

Electronic rear tug device and sewing machine

Technical Field

The utility model relates to a sewing machine equipment technical field especially relates to a tow boat device and sewing machine behind electron.

Background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient. The traditional sewing machine adopts a feeding mode of feeding cloth by a feed dog, the feeding mode has limited cloth feeding force, and especially for sewing materials with special materials, the feeding cloth is relatively hard and shows that the stitch is too small. For this reason, some sewing machines are provided with rear tug devices, and the conventional rear tug of the sewing machine is mainly classified into an integrated electronic rear tug and a mechanical rear support device. The rear tugboat mainly plays a role in assisting in dragging in the sewing process, can replace the traditional manual dragging, realizes automatic operation, and can effectively solve the technical problems that the sewing process is staggered when thin materials are sewn, and the sewing process is difficult to feed when thick materials are sewn.

The common integrated electronic rear tug mainly comprises a feeding mechanism and a pressure lifting mechanism. The feeding mechanism usually adopts a stepping motor to drive a tug to feed; the lifting mechanism generally adopts a direct current speed reducing motor, an electromagnet, an air cylinder and the like as a driving source to realize the lifting and the pressing of the tug. However, because the number of electronic electric auxiliary devices is large, the feeding mechanism and the pressure lifting mechanism have space limitations due to independent driving sources. For example, the pneumatic driving device is not suitable for popularization and application. The electromagnet is driven to be used for a long time and has noise pollution. In addition, the integrated electronic rear tug based on the electric and electric control device has high production and manufacturing cost and is not beneficial to wide popularization and use. Secondly, the distance between the rear tug and the presser foot cannot be reduced due to the limitation of the structure, and the rotation performance is poor.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, the to-be-solved technical problem of the present invention is to provide an electronic rear tug device and a sewing machine equipped with the same, which can link the pressure lifting mechanism of the electronic rear tug with the presser foot mechanism of the sewing machine, thereby saving the driving source of the pressure lifting mechanism and improving the synchronism of the equipment.

In order to achieve the purpose, the utility model provides an electronic rear tug device, which comprises a presser foot pressing rod, a presser foot and a rear tug, wherein the presser foot is connected below the presser foot pressing rod; the presser foot handle is provided with a presser foot handle raised head, the base is provided with a base raised head, the base raised head is sleeved on the presser foot pressure rod and is arranged on the upper side of the presser foot handle raised head, and a gap is formed between the presser foot handle raised head and the base raised head.

Preferably, the rear tug is in transmission connection with a feeding driving assembly, the feeding driving assembly comprises a motor and a transmission assembly, the motor and the transmission assembly are fixed on the sewing machine body, and the motor and the rear tug are connected through the transmission assembly.

Preferably, the transmission assembly comprises a coupling rod, an output shaft penetrating through the coupling rod and moving axially, and a lifting connecting sleeve sleeved on the outer circumference of the output shaft, one end of the coupling rod is fixed on a shaft of the motor, the output shaft penetrates through the lifting connecting sleeve and is rotatably connected with the lifting connecting sleeve, and the end part of the output shaft far away from the coupling rod is in transmission connection with the rear tug.

Preferably, the two ends of the inner wall of the lifting connecting sleeve are respectively provided with an upper end limiting sleeve and a lower end limiting sleeve, a plurality of bearings are further arranged between the output shaft and the lifting connecting sleeve, and the bearings are arranged between the upper end limiting sleeve and the lower end limiting sleeve.

Preferably, the transmission assembly further comprises a synchronizing shaft and a driving shaft, a gear bin is arranged in the base, an output shaft through hole is formed in the top of the gear bin, the synchronizing shaft and the driving shaft are both arranged on the base, and the driving shaft is rotatably connected with the rear tug; the output shaft penetrates through the through hole of the output shaft and is in meshed transmission with the synchronizing shaft in the gear bin, and the synchronizing shaft is in transmission connection with the driving shaft.

Preferably, the electronic rear tug device further comprises a lifting adjusting assembly, the lifting adjusting assembly comprises a lifting pin, a lifting piece and a return spring, and the lifting pin is fixed on the lifting connecting sleeve; the lifting piece comprises a driving stress block and a driven stress block, the driving stress block and the driven stress block are fixedly connected into an L shape, a first through hole is formed in the joint of the driving stress block and the driven stress block, a second through hole is formed in the end portion of the driving stress block, a sliding groove is formed in the driven stress block, the lifting pin penetrates through the sliding groove, the lifting piece is hinged to the sewing machine body through a connecting piece in the first through hole, one end of the reset spring is connected with the second through hole, and the other end of the reset spring is connected with the sewing machine body.

Preferably, the lifting adjusting assembly further comprises a pressure regulating piece, the depth of the pressure regulating piece can be adjusted to penetrate through the sewing machine body, and the reset spring is connected with the sewing machine body through the pressure regulating piece.

Preferably, the lifting adjusting assembly further comprises a sleeve, a connecting pin, a lifting wrench and a lifting cam, the sleeve is arranged in the sewing machine body, the lifting connecting sleeve is arranged in the sleeve in a penetrating mode, the connecting pin is hinged to the sewing machine body, the lifting cam is fixedly arranged on the connecting pin and arranged on the lower side of the lifting pin, and the lifting wrench is connected with the lifting cam through the connecting pin.

Preferably, the end part of the sewing machine body is further provided with an end cover panel, the lifting wrench and the lifting cam are respectively arranged on two sides of the end cover panel, and the connecting pin penetrates through the end cover panel.

In order to achieve the above object, the present invention also provides a sewing machine, including the electronic rear tug device and the sewing machine body, the electronic rear tug device is fixed on the sewing machine body.

As described above, the utility model relates to a tow boat device behind electron has following beneficial effect:

the utility model relates to an electronic rear tug device, the rear tug is arranged on a base, a base raised head is arranged on the base, a presser foot pressure rod penetrates through the base raised head, a presser foot handle is also arranged between the presser foot pressure rod and a presser foot, the presser foot handle raised head is arranged on the presser foot handle, the base raised head is arranged on the upper side of the presser foot handle raised head, and a gap is formed between the presser foot handle raised head and the base raised head; when the presser foot rises along with the presser foot pressure rod, the raised head of the presser foot handle is abutted with the raised head of the base, the base is driven by the raised head of the presser foot handle to rise along the presser foot pressure rod, and the rear tug rises; the base is also connected with a lifting adjusting assembly, when the rear tug on the base presses the sewing material, the lifting adjusting assembly is in a stress balance state, when the base ascends, the lifting adjusting assembly is in a stretching state, when the pressure foot handle protruding head descends, the pressure adjusting assembly restores the stress balance state from the stretching state, downward pressure is applied to the base, the base protruding head descends along with the pressure foot handle protruding head, the rear tug on the base descends synchronously, a driving source for lifting and pressing the rear tug is saved, and the production cost is reduced; meanwhile, when the thickness of the sewing material changes, the height of the rear tug can be adjusted, the sewing material is effectively prevented from being accumulated between the presser foot and the rear tug, and the sewing quality of the sewing material is ensured.

Drawings

FIG. 1 is a spatial structure view of the electronic rear tug device of the present invention mounted on a sewing machine;

FIG. 2 is an enlarged view of the presser foot handle and the base of the electronic rear tug apparatus of the present invention;

fig. 3 is a left side view of the electronic rear tug apparatus of the present invention;

FIG. 4 isbase:Sub>A cross-sectional view taken along A-A of FIG. 3;

fig. 5 is a spatial structure diagram of the feeding driving assembly of the electronic rear tug device of the present invention;

fig. 6 is an exploded view of the base of the electronic rear tug apparatus of the present invention;

figure 7 is an exploded view of the lift adjustment assembly of the electronic rear tug assembly of the present invention;

fig. 8 is a spatial structure diagram of the pressure-lifting member of the electronic rear tug device of the invention;

fig. 9 is a spatial structure diagram of the mounting plate of the electronic rear tug device of the present invention.

Description of reference numerals:

1. a sewing machine body; 101. mounting a plate; 102. a motor shaft through hole; 103. a support block; 104. a support block through hole; 105. a sleeve through hole; 106. a connecting pin through hole; 107. a pressure regulating bolt through hole;

2. a synchronizing shaft;

3. a base; 301. a raised head of the base; 302. a gear chamber; 303. an output shaft through hole; 304. a first bearing bore; 305. a second bearing bore; 306. a gear compartment cover plate;

4. a rear tug; 5. a drive shaft; 6. a small synchronous pulley; 7. a large synchronous pulley; 8. a ball bearing; 9. a protective cover; 10. A limiting hole; 11. an output shaft; 12. a sleeve; 13. a motor; 14. a coupling rod; 1401. a limiting groove; 15. a presser foot lever; 16. a presser foot handle; 1601. a presser foot; 1602. a raised head of the presser foot handle; 17. lifting the connecting sleeve; 1701. a connecting flange; 18. an upper end limiting sleeve; 1801. a lower end limiting sleeve; 19. connecting columns; 1901. a lift pin; 20. a deep groove ball bearing;

21. lifting the pressing piece; 2101. an active stress block; 2102. a driven stress block; 2103. a second through hole; 2104. a first through hole; 2105. a chute;

22. a lift cam; 2201. a groove; 23. a return spring; 24. an axial screw; 25. a limit pin; 26. a needle bar; 27. A pressure regulating bolt; 28. a tension spring hook plate; 29. lifting the wrench; 30. a supporting block through hole bearing; 31. a connecting pin; 32. an end cap panel.

Detailed Description

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

It should be understood that the drawings of the present application are only used to match the contents disclosed in the specification, so as to be known and read by those skilled in the art, and not to limit the practical limitations of the present invention, so that the present application does not have any technical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present application without affecting the function and the achievable purpose of the present application. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be considered as the scope of the present invention without substantial changes in the technical content.

As shown in fig. 1, the present invention provides an electronic rear tug device, which is convenient for description, as shown in fig. 1, the length direction of the sewing machine body 1 is defined as the left-right direction, the width direction of the sewing machine body 1 is the front-back direction, the height direction of the sewing machine body 1 is the up-down direction, that is, in fig. 4, the left side and the right side of the paper are respectively the back direction and the front direction, the up direction and the down direction of the paper are respectively the up direction and the down direction, and the front side and the back side of the paper are respectively the left direction and the right direction.

As shown in fig. 1 and 2, the utility model provides an electronic rear tug device, including presser foot depression bar 15, fix presser foot 1601 in presser foot depression bar 15 bottom and install the base 3 of rear tug 4, rear tug 4 sets up the rear side at presser foot 1601, is provided with presser foot handle 16 between presser foot 1601 and presser foot depression bar 15, the top and the presser foot depression bar 15 fixed connection of presser foot handle 16, the bottom and the presser foot 1601 fixed connection of presser foot handle 16. A presser foot handle raised head 1602 is integrally arranged on the rear end face of the presser foot handle 16, a base raised head 301 is integrally arranged on the front end face of the base 3, the base raised head 301 is arranged on the upper side of the presser foot handle raised head 1602, the presser foot pressure lever 15 penetrates through the base raised head 301, the base 3 axially moves on the presser foot pressure lever 15, and a gap exists between the presser foot handle raised head 1602 and the base raised head 301.

The utility model relates to a tow boat device behind electron, rear tow boat 4 set up on base 3, are provided with base plush copper 301 on the base 3, and presser foot depression bar 15 runs through base plush copper 301, are provided with presser foot handle 16 between presser foot depression bar 15 and the presser foot 1601, and are provided with presser foot handle plush copper 1602 on 16's the rear end face, and presser foot handle plush copper 1602 sets up in the below of base plush copper 301 and mutual butt. The base 3 is also connected with a lifting adjusting component, and when the rear tug 4 on the base 3 is pressed on the sewing material, the lifting adjusting component is in a stress balance state (initial state); the presser foot pressure lever 15 is a conventional component in the existing sewing machine, when the presser foot pressure lever 15 rises, the presser foot handle 16 rises, the presser foot handle raised head 1602 rises to jack up the base raised head 301, the base 3 drives the rear tug 4 to rise along the presser foot pressure lever 15, the rear tug 4 is separated from the sewing material, and the lifting adjusting component is in a stretching state at the moment; when the presser foot pressing rod 15 descends, the presser foot handle 16 descends, the presser foot handle raised head 1602 descends, the lifting adjusting assembly returns to the initial state from the stretching state, the base raised head 301 descends along with the presser foot handle raised head 1602 under the action of the lifting adjusting assembly, and therefore the rear tug 4 presses the sewing material again, and the lifting function of the rear tug 4 is achieved. The rear towing wheel 4 is also provided with a feeding driving assembly, the feeding driving assembly works to drive the rear towing wheel 4 to rotate, sewn sewing materials are dragged, and the feeding function of the rear towing wheel 4 is realized. In this embodiment, presser foot 1601 employs a customized female high presser foot assembly.

The utility model relates to a tow boat device behind electron, with rear tow boat 4 through base 3, presser foot handle 16 with presser foot depression bar 15 synchronous lift be connected, rely on presser foot depression bar 15's lift to realize that lifting of rear tow boat 4 presses the function, saved a driving source, reduced manufacturing cost, the lift of rear tow boat 4 is pressed and is synchronous with the lift of presser foot 1601 simultaneously, has improved the synchronism, has guaranteed the quality of sewing up.

Preferably, as shown in fig. 1, 4 and 5, the feeding driving assembly includes a motor 13 fastened to the sewing machine body 1 by bolts, and a transmission assembly, the motor 13 is connected to the rear tug 4 by the transmission assembly, and the motor 13 is a stepping motor. Further, as shown in fig. 5, the transmission assembly includes a coupling rod 14, an output shaft 11 penetrating through the coupling rod 14 and moving axially, and a lifting connection sleeve 17 sleeved on the outer circumference of the output shaft 11, the top end of the coupling rod 14 is sleeved on a motor shaft of the motor 13, the bottom end of the coupling rod is sleeved on the outer circumference of the output shaft 11, the output shaft 11 penetrates through the lifting connection sleeve 17 and is rotatably connected with the lifting connection sleeve 17 through a plurality of bearings, and the tail end of the output shaft 11 is in transmission connection with the rear tug 4. In this embodiment, the outer wall of the coupling rod 14 is axially provided with a limit groove 1401, the output shaft 11 is provided with a limit hole 10, a limit nail 25 penetrates through the limit groove 1401, the limit nail 25 is inserted into the limit hole 10, and the output shaft 11 axially moves along the limit groove 1401 under the action of the limit nail 25. Further, the bearing is a deep groove ball bearing 20, and the deep groove ball bearing 20 is arranged between the periphery of the output shaft 11 and the inner wall of the lifting connecting sleeve 17, so that the output shaft 11 smoothly rotates in the lifting connecting sleeve 17; further, the transmission assembly further comprises a synchronizing shaft 2 and a driving shaft 5, the synchronizing shaft 2 is arranged on the base 3 and is in transmission connection with the output shaft 11, the driving shaft 5 is in key connection with the rear tug 4, and the synchronizing shaft 2 is in transmission connection with the driving shaft 5.

Preferably, as shown in fig. 4 and 5, the top end of the inner wall of the lifting connecting sleeve 17 is sleeved with an upper end limiting sleeve 18, the bottom end of the lifting connecting sleeve 17 is sleeved with a lower end limiting sleeve 1801, and the plurality of deep groove ball bearings 20 are arranged between the upper end limiting sleeve 18 and the lower end limiting sleeve 1801. In the present embodiment, the number of the deep groove ball bearings 20 is six, each group is three, and the deep groove ball bearings are divided into two groups, which are respectively arranged at the top end and the bottom end of the lifting connection sleeve 17. The output shaft 11 is limited in the lifting connecting sleeve 17 by the upper end limiting sleeve 18 and the lower end limiting sleeve 1801, so that the output shaft 11 is prevented from axially moving in the lifting connecting sleeve 17, and the output shaft 11 and the lifting connecting sleeve 17 are ensured to be lifted synchronously.

Preferably, as shown in fig. 3 and 6, a gear bin 302 is formed in the base 3, an output shaft through hole 303 is formed in the top of the gear bin 302, a first bearing hole 304 is formed in the right side wall of the gear bin 302, a second bearing hole 305 is formed in the lower side of the gear bin 302, the synchronizing shaft 2 is disposed in the first bearing hole 304 through a ball bearing 8, the driving shaft 5 is disposed in the second bearing hole 305 through the ball bearing 8, the output shaft 11 penetrates through the output shaft through hole 303 and is engaged with the synchronizing shaft 2 in the gear bin 302, and the synchronizing shaft 2 is in transmission connection with the driving shaft 5. Further, in the present embodiment, the number of the ball bearings 8 is four, two ball bearings 8 are respectively disposed at two ends of the first bearing hole 304, and two ball bearings 8 are respectively disposed at two ends of the second bearing hole 305, so as to ensure that the synchronizing shaft 2 and the driving shaft 5 smoothly rotate in the first bearing hole 304 and the second bearing hole 305, respectively. Further, directly process out the initiative awl tooth on the bottom of output shaft 11, directly process out driven awl tooth on the left end of synchronizing shaft 2, initiative awl tooth and driven awl tooth meshing are connected to the vertical rotation that makes synchronizing shaft 2 changes into horizontal rotation. In other embodiments, the driving bevel gear and the driven bevel gear may be replaced by bevel gears respectively keyed to the output shaft 11 and the synchronizing shaft 2. Further, the right end of synchronizing shaft 2 is connected with big synchronous pulley 7 through the key, and the right end of drive shaft 5 is connected with little synchronous pulley 6 through the key, connects through synchronous belt drive between big synchronous pulley 7 and the little synchronous pulley 6 to at synchronizing shaft 2 rotation in-process, drive shaft 5 rotates, and drive shaft 5 and then drives rear tug 4 and rotate, realizes rear tug 4's pay-off function. Further, the periphery of hold-in range still is provided with safety cover 9 for avoid the hold-in range to rotate the damage object. Furthermore, a gear bin cover plate 306 is detachably clamped on the left end face of the gear bin 302 through a clamping groove, and an operator can detach the gear bin cover plate 306 to inject oil into the gear bin 302.

Preferably, as shown in fig. 5, a connecting flange 1701 is further welded to the outer circumference of the lower end of the elevation joint sleeve 17, and the connecting flange 1701 is fastened to the base 3 on the outer circumference side of the output shaft through hole 303 by means of screws. In this embodiment, the connecting flange 1701 fastens and connects the lifting connecting sleeve 17 and the base 3 through a screw, so as to realize the rapid and stable synchronous lifting of the lifting connecting sleeve 17 and the base 3, further drive the rear tug 4 to synchronously lift, and realize the pressure lifting function of the rear tug 4.

Preferably, as shown in fig. 7 and 8, the lifting adjustment assembly includes a connecting column 19 fastened to the outer periphery of the lifting connecting sleeve 17 by screws, a lifting pin 1901 welded to the left end face of the connecting column 19, a lifting member 21, and a return spring 23, the lifting member 21 includes a driving force-receiving block 2101 and a driven force-receiving block 2102 which are fixedly connected to form an L-shape, a first through hole 2104 is formed at the joint of the driving force-receiving block 2101 and the driven force-receiving block 2102, a second through hole 2103 is formed at the top end of the driving force-receiving block 2101, a sliding groove 2105 is formed in the driven force-receiving block 2102, the lifting pin 1901 penetrates through the sliding groove 2105 and moves up and down along the sliding groove 2105, the lifting member 21 is hinged to the sewing machine body 1 by an axial screw 24 in the first through hole 2104, an axial screw 24 is inserted in the second through hole 2103, the rear end of the return spring 23 is wound on the axial screw 24 of the second through hole 2103, and the front end of the return spring 23 is connected to the sewing machine body 1. Further, in the embodiment, a pressure regulating member is further arranged between the return spring 23 and the sewing machine body 1, and the pressure regulating member can penetrate through the sewing machine body 1 with adjustable depth; the pressure regulating piece adopts a pressure regulating bolt 27, the pressure regulating bolt 27 penetrates through the front wall of the sewing machine body 1 through threads, and the tightness of the return spring 23 is regulated through the screwed depth of the threads. Further, as shown in fig. 7, a tension spring hook plate 28 is further disposed between the pressure regulating bolt 27 and the return spring 23, a cross section of the tension spring hook plate 28 is L-shaped, two mutually perpendicular surfaces of the L-shaped tension spring hook plate 28 are provided with two through holes, at least one through hole is a threaded hole, one surface of the tension spring hook plate 28 is fastened and connected with the pressure regulating bolt 27 through the threaded hole, and the end of the return spring 23 is connected in the through hole on the other surface. In this embodiment, the initial state of the return spring 23 has a certain stretching amount, so that the rear tug 4 has a certain pressure on the sewing material, thereby realizing the feeding function. The elasticity of the pressure adjusting bolt 27 in the depth adjusting reset spring 23 in the sewing machine body 1 is used for adjusting the pressure of the rear tug 4 on the sewing material, and meanwhile, the elasticity of the reset spring 23 is used for ensuring that the rear tug 4 can synchronously follow the lifting of the presser foot pressing rod 15.

Preferably, as shown in fig. 7, the lifting adjusting assembly further includes a sleeve 12, a connecting pin 31, a lifting wrench 29, and a lifting cam 22, the sleeve 12 is disposed in the sewing machine body 1, the lifting connecting sleeve 17 is axially movably inserted into the sleeve 12, and the sleeve 12 is made of copper; the connecting pin 31 is hinged to the sewing machine body 1, the lifting cam 22 is fixedly arranged on the connecting pin 31 and arranged on the lower side of the lifting pin 1901, and the lifting wrench 29 is connected with the lifting cam 22 through the connecting pin 31.

Further, in this embodiment, the manual adjustment of the lift adjustment assembly is as follows: the lifting wrench 29 is rotated, the lifting wrench 29 drives the lifting cam 22 to rotate through the connecting pin 31, the lifting cam 22 jacks up the lifting pin 1901, the lifting pin 1901 rises and drives the lifting connecting sleeve 17 to rise through the connecting column 19, the base 3 and the output shaft 11 are further driven to rise, and the rear tug 4 rises.

The descent of the lift adjustment assembly proceeds as follows: during the lifting of the lifting pin 1901, the lifting pin 1901 is lifted in the sliding slot 2105, and the driven force receiving block 2102 receives an upward force, so that the lifting member 21 rotates counterclockwise around the axial screw 24 in the first through hole 2104, and the return spring 23 is stretched backward. After the lifting wrench 29 is reset, under the action of the tension of the reset spring 23, the lifting and pressing piece 21 rotates clockwise around the shaft position screw 24 in the first through hole 2104, the sliding groove 2105 rotates clockwise, the lifting pin 1901 is subjected to downward force, so that the connecting column 19 drives the lifting connecting sleeve 17 to move downwards, the base 3 and the output shaft 11 descend, and the rear tug 4 falls down.

Further, the lifting cam 22 is further provided with a groove 2201, the groove 2201 is arranged at the highest point of the lifting cam 22, when the lifting cam 22 rotates until the lifting pin 1901 is caught in the groove 2201, the lifting adjusting assembly is at a dead point, the rear tug 4 is in a lifting static state, and the rear end of the return spring 23 is in a stretching state under the pulling force of the lifting and pressing piece 21.

Preferably, as shown in fig. 1, an end cover panel 32 is further fastened to the left end of the sewing machine body 1 through a screw, the lifting wrench 29 and the lifting cam 22 are respectively disposed at two sides of the end cover panel 32, and a through hole is formed in the end cover panel 32 and is communicated with the connecting pin through hole 106. The end cover panel 32 protects devices inside the sewing machine body 1. Further, as shown in fig. 9, a mounting plate 101 is integrally provided on the sewing machine body 1, and the electronic rear tug device is mounted at the position of the mounting plate 101. A motor shaft through hole 102 is formed in the top of the mounting plate 101, the motor 13 is arranged on the top of the mounting plate 101, and a motor shaft penetrates through the motor shaft through hole 102 and is connected with the connecting shaft rod 14 in an inserting mode; a supporting block 103 is welded on the inner wall of the right side of the mounting plate 101 under the motor shaft through hole 102, a supporting block through hole 104 is formed in the supporting block 103, a supporting block through hole bearing 30 is arranged in the supporting block through hole 104, and the coupling rod 14 penetrates through the supporting block through hole 104 and rotates in the supporting block through hole 104 through the supporting block through hole bearing 30; the support block 103 supports the link rod 14 to ensure that the link rod 14 does not deviate in rotation. A sleeve through hole 105 is formed in the bottom surface of the mounting plate 101 right below the supporting block through hole 104, and the sleeve 12 is fixed in the sleeve through hole 105 in an interference fit manner; the end surface of the mounting plate 101 at the left side of the sleeve through hole 105 is provided with a connecting pin through hole 106, and the right end of the connecting pin 31 is hinged in the connecting pin through hole 106. Seted up pressure regulating bolt through-hole 107 on the antetheca of mounting panel 101, seted up the internal thread in the pressure regulating bolt through-hole 107, pressure regulating bolt 27 passes through screw-thread fit in pressure regulating bolt through-hole 107 to through rotatory pressure regulating bolt 27, can adjust the degree of depth of pressure regulating bolt 27 in pressure regulating bolt through-hole 107, thereby realize reset spring 23's rate of tension and adjust. In addition, the presser foot pressing rod 15 and the needle bar 26 both penetrate through the mounting plate 101, and the connection mode is the same as the structure of the sewing machine in the prior art.

The utility model also provides a sewing machine, sewing machine contain tow boat device behind above-mentioned electron.

The utility model relates to a tow boat device behind electron at first connects each spare part as figure 1-9 before the use, then sews up different seam material and have the following condition:

1. when the rear tug 4 is normally lifted, pressed and fed

The operator first adjusts the depth of the pressure-adjusting bolt 27 in the pressure-adjusting bolt through-hole 107 so that the return spring 23 has a certain amount of tension, and is installed between the pressure-raising member 21 and the pressure-adjusting bolt 27. An operator raises the presser foot pressing rod 15 (the presser foot pressing rod 15 is a conventional component of the sewing machine), the presser foot handle 16 fastened on the presser foot pressing rod 15 is raised along with the presser foot pressing rod 15, the presser foot handle raised head 1602 at the rear end of the presser foot handle 16 is raised, when the presser foot handle raised head 1602 is abutted to the base raised head 301, the base 3 is raised along with the presser foot handle raised head 1602, and the rear tug 4 is raised; when the base 3 rises, the lifting connecting sleeve 17 connected with the base 3 through the connecting flange 1701 receives an upward force, the lifting connecting sleeve 17 rises to drive the output shaft 11 to rise, the output shaft 11 axially rises in the limiting groove 1401 of the connecting shaft rod 14 through the limiting nail 25, and the driving bevel gear at the bottom end of the output shaft 11 is enabled to be meshed with the driven bevel gear at the left end of the synchronizing shaft 2 all the time. During the process of lifting the connecting sleeve 17, the connecting column 19 is lifted, the connecting pin 31 is lifted in the sliding groove 2105, the lifting and pressing piece 21 is rotated counterclockwise around the shaft screw 24 in the first through hole 2104 by the lifting force of the connecting pin 31, and the return spring 23 on the active force bearing block 2101 is stretched backwards. When the presser foot pressure lever 15 falls, the presser foot handle raised head 1602 descends to be separated from the base raised head 301, at the moment, the pulling force in the reset spring 23 drives the lifting and pressing piece 21 to rotate clockwise around the shaft position screw 24 in the first through hole 2104, the sliding groove 2105 rotates clockwise, the connecting pin 31 is subjected to a downward force, the connecting column 19 drives the lifting connecting sleeve 17 to descend, the base 3 is driven to descend, and the rear tug 4 presses the sewing material again; the lifting connecting sleeve 17 descends to drive the output shaft 11 to descend, the output shaft 11 axially descends in a limiting groove 1401 of the connecting shaft rod 14 through a limiting nail 25, and therefore the driving bevel gear at the bottom end of the output shaft 11 is enabled to be always meshed with the driven bevel gear at the left end of the synchronizing shaft 2, and the pressure lifting function of the rear tug 4 is achieved.

When the rear tug 4 and the presser foot 1601 are pressed on the sewing material, an operator opens the motor 13, the motor 13 works through the motor shaft → the connecting shaft rod 14 → the output shaft 11 → the driving bevel gear → the driven bevel gear → the synchronizing shaft 2 → the large synchronous pulley 7 → the synchronous belt → the small synchronous pulley 6 → the driving shaft 5, the rear tug 4 is driven to rotate through the driving shaft 5, and the rear tug 4 rotates to be matched with feeding teeth of the sewing machine, so that the feeding function of the rear tug 4 is realized. The motor 13 rotates forwards, the rear tug 4 rotates forwards to feed, the motor 13 rotates backwards, and the rear tug 4 rotates backwards to return. When the normal sewing material becomes thin and thick, the presser foot 1601 rises, and then the rear tug 4 is driven to rise together through the presser foot handle 16, so that the situation that the sewing material is clamped between the rear tug 4 and the presser foot 1601 in an over-thick mode is reduced.

2. When the sewing material does not need the lifting and the feeding of the rear tug 4

When making the scene when some and do not need lifting of back tow boat 4 to press and pay-off function, the rotatory lifting spanner 29 of operating personnel, lifting spanner 29 drives lifting cam 22 through connecting pin 31 and rotates, and lifting cam 22 is rotatory with lifting pin 1901 jack-up, and then lifting connecting sleeve 17 rises, and base 3 rises, wears to establish that the inside output shaft 11 of lifting connecting sleeve 17 rises, and back tow boat 4 lifts. When the lifting cam 22 is completely rotated to the position, the lifting pin 1901 is clamped into the groove 2201 of the lifting cam 22, the lifting adjusting assembly is located at the dead point position at the moment, the rear tug 4 is in the lifting state, the lifting piece 21 is reversely deviated by a certain angle under the action of the connecting column 19, the rear end of the reset spring 23 is in the stretching state under the pulling force of the lifting piece 21, and meanwhile, the lifting height of the lifting cam 22 is greater than that of the presser foot pressing rod 15, so that when the presser foot pressing rod 15 is normally lifted, the raised head 1602 of the presser foot handle cannot collide with the raised head 301 of the base, and the normal work of the presser foot 1601 is ensured. When the lifting wrench 29 is reset, the lifting pin 1901 is disengaged from the groove 2201 of the lifting cam 22, the lifting and pressing piece 21 rotates clockwise under the elastic force of the return spring 23, the lifting pin 1901 descends in the sliding groove 2105, the lifting and connecting sleeve 17 descends, the output shaft 11 and the base 3 descend synchronously, and the rear tug 4 presses the seam material.

3. Adjustment of the pressing pressure of the rear tug 4

When the thickness and the material of some sewing materials are different, the pressure of the rear tugboat 4 needs to be adjusted to ensure that the rear tugboat 4 can smoothly feed materials. An operator rotates the pressure regulating bolt 27 in the direction of separating from the mounting plate 101, the front end of the return spring 23 is stretched, the lifting piece 21 rotates clockwise around the shaft position screw 24 in the first through hole 2104, the sliding groove 2105 has downward pressure on the lifting pin 1901, so that the connecting column 19 and the lifting connecting sleeve 17 are forced downwards, the base 3 and the output shaft 11 are forced downwards, and the pressure of the rear tug 4 on the sewing material is increased. Similarly, the operator rotates the pressure regulating bolt 27 in the direction of screwing into the mounting plate 101, the stretching amount of the front end of the return spring 23 is reduced, the pressure raising piece 21 rotates anticlockwise around the shaft position screw 24 in the first through hole 2104, so that the downward pressure of the sliding chute 2105 on the lifting pin 1901 is reduced, the downward pressure of the connecting column 19 and the lifting connecting sleeve 17 is reduced, the downward pressure of the base 3 and the output shaft 11 is reduced, and the pressure of the rear tug 4 on the sewing material is reduced.

The utility model relates to an electronic rear tug device, the driving source of the lifting and pressing function of the rear tug 4 is shared with the presser foot pressure bar 15, thus saving one driving source, realizing the functions of two driving sources, having simple structure and low cost; the rear tug 4 and the presser foot pressure rod 15 are synchronously linked under the abutting of the presser foot handle raised head 1602 and the base raised head 301, and the lifting and pressing response speed of the rear tug 4 is higher; the lifting adjusting assembly of the rear towing wheel 4 can be suitable for the conditions that the thickness of the sewing material is changed from thin to thick and the sewing material does not need a rear mop through the return spring 23, and has wide application range and strong functionality; the electronic rear tug device is good in structural integrity and low in requirement on assembly personnel, the position precision of the rear tug 4 relative to the presser foot 1601 is higher, and the problems of feeding deflection and uneven feeding cloth caused by the position deviation of the rear tug 4 are reduced; rear tug 4 of 25mm minor diameter can be selected for use to rear tug 4, can be closer to presser foot 1601, and the gyration performance is better.

To sum up, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a tow boat device behind electron, includes presser foot depression bar (15), presser foot (1601) and rear tug (4), presser foot (1601) are connected in the below of presser foot depression bar (15), rear tug (4) set up in one side of presser foot (1601), its characterized in that: a presser foot handle (16) is arranged between the presser foot (1601) and the presser foot pressing rod (15), and the rear tug (4) is rotatably installed on the base (3); the presser foot handle structure is characterized in that a presser foot handle raised head (1602) is arranged on the presser foot handle (16), a base raised head (301) is arranged on the base (3), the base raised head (301) is sleeved on the presser foot pressing rod (15) and arranged on the upper side of the presser foot handle raised head (1602), and a gap exists between the presser foot handle raised head (1602) and the base raised head (301).

2. The electronic rear tug apparatus of claim 1, wherein: the rear tug (4) is connected with a feeding driving assembly in a transmission mode, the feeding driving assembly comprises a motor (13) and a transmission assembly, the motor (13) is fixed to the sewing machine body (1), and the rear tug (4) is connected with the motor (13) through the transmission assembly.

3. The electronic rear tug apparatus of claim 2, further comprising: the transmission assembly comprises a coupling rod (14), an output shaft (11) which is arranged in the coupling rod (14) in a penetrating mode and moves axially, and a lifting connecting sleeve (17) which is sleeved on the outer circumferential direction of the output shaft (11), one end of the coupling rod (14) is fixed on a shaft of a motor (13), the output shaft (11) penetrates through the lifting connecting sleeve (17) and is connected with the lifting connecting sleeve (17) in a rotating mode, and the end portion, far away from the coupling rod (14), of the output shaft (11) is in transmission connection with a rear towing wheel (4).

4. The electronic rear tug apparatus of claim 3, wherein: lifting adapter sleeve (17) inner wall both ends are provided with upper end stop collar (18) and lower extreme stop collar (1801) respectively, still be provided with a plurality of bearing, a plurality of between output shaft (11) and lifting adapter sleeve (17) the bearing sets up between upper end stop collar (18) and lower extreme stop collar (1801).

5. The electronic rear tug apparatus of claim 3, wherein: the transmission assembly further comprises a synchronizing shaft (2) and a driving shaft (5), a gear bin (302) is arranged in the base (3), an output shaft through hole (303) is formed in the top of the gear bin (302), the synchronizing shaft (2) and the driving shaft (5) are both arranged on the base (3), and the driving shaft (5) is connected with the rear tug (4); the output shaft (11) penetrates through the output shaft through hole (303) and is in meshed transmission with the synchronizing shaft (2) in the gear bin (302), and the synchronizing shaft (2) is in transmission connection with the driving shaft (5).

6. The electronic rear tug apparatus of claim 3, wherein: the lifting mechanism is characterized by further comprising a lifting adjusting assembly, wherein the lifting adjusting assembly comprises a lifting pin (1901), a lifting piece (21) and a return spring (23), and the lifting pin (1901) is fixed on the lifting connecting sleeve (17); the lifting and pressing piece (21) comprises a driving stress block (2101) and a driven stress block (2102), the driving stress block (2101) and the driven stress block (2102) are fixedly connected into an L shape, a first through hole (2104) is formed in the joint of the driving stress block (2101) and the driven stress block (2102), a second through hole (2103) is formed in the end of the driving stress block (2101), a sliding groove (2105) is formed in the driven stress block (2102), a lifting pin (1901) penetrates through the sliding groove (2105), the lifting and pressing piece (21) is hinged to the sewing machine body (1) through a connecting piece in the first through hole (2104), one end of a return spring (23) is connected with the second through hole (2103), and the other end of the return spring is connected with the sewing machine body (1).

7. The electronic rear tug apparatus of claim 6, wherein: the lifting adjusting assembly further comprises a pressure regulating piece, the depth of the pressure regulating piece can be adjusted to penetrate through the sewing machine body (1), and the reset spring (23) is connected with the sewing machine body (1) through the pressure regulating piece.

8. The electronic rear tug apparatus of claim 7, wherein: lifting adjusting part still includes sleeve pipe (12), connecting pin (31), lifting spanner (29) and lifting cam (22), sleeve pipe (12) set up in sewing machine organism (1) and lifting adapter sleeve (17) wear to establish in sleeve pipe (12), connecting pin (31) articulate on sewing machine organism (1), lifting cam (22) set firmly on connecting pin (31), and set up the below side at lifting pin (1901), lifting spanner (29) are connected with lifting cam (22) through connecting pin (31).

9. The electronic rear tug apparatus of claim 8, wherein: the end part of the sewing machine body (1) is further provided with an end cover panel (32), the lifting wrench (29) and the lifting cam (22) are arranged on two sides of the end cover panel (32) respectively, and the connecting pin (31) penetrates through the end cover panel (32).

10. A sewing machine characterized in that: comprising an electronic rear tug device according to any of claims 1-9 and a sewing machine body (1), the electronic rear tug device being fixed to the sewing machine body (1).

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