CN203080246U - Cloth feeding device of sewing machine - Google Patents

Abstract

The utility model relates to a cloth feeding device of a sewing machine. Mechanisms which move in a linear mode in the horizontal direction and the perpendicular direction drive a feeding device of the cloth feeding device, so that no matter where the feeding device of the cloth feeding device is located, moving tracks of the feeding device are uniform, and therefore, stability of cloth moving is achieved. Therefore, according to an existing cloth feeding device of the sewing machine, the defect that due to the fact that moving quantities of the front end and the rear end of a feeding device are different, cloth feeding is not stable and sewing quality is influenced is solved.

Description

The cloth-feeding device of Sewing machines

Technical field

The utility model relates to a kind of cloth-feeding device of Sewing machines, is the feed arrangement relevant with feed motion that move that makes cloth.

Background technology

The cloth-feeding device of general Sewing machines is the lower opening place at needle plate, as shown in Figure 1, advances knot 14 and needle movement simultaneously, and the plane is overhanging from the needle plate moves, and restores to the original state during landing.And because cloth is pressed in the needle plate top, pressing plate utilizes elastomer to push to needle plate one side, and utilization is advanced to tie about in the of 14, seesawing moves the cloth between needle plate and the pressing plate.

The horizontal movement of feeding 14 by the feeding adjusting device, utilizes connecting ring 6 to make horizontal feed axle 8 do circular motion, thereby the fore-stock 9 of horizontal feed axle 8 one ends is waved.These fore-stock 9 one ends, link to each other with cam up and down 11 on being installed in lower shaft 1 as fulcrum with axle 10, slide block 12 are arranged slidably on the pedestal 13, feeding 14 have been installed near in the central.This pedestal about in the of 13, horizontal movement form circular motion jointly.

Fig. 1 is the oblique view of background technology structure.Bar 3 links to each other with horizontal cam 2 on being fixed on lower shaft 1, and the slide block 5 of one end makes the sliding surface 4a of control agent 4 rely on the rotation of lower shaft 1 and carry out front and back rectilinear motion, and the connecting ring 6 that is installed on the slide block 5 is fited by a medium-height trestle 7 and a p1.Medium-height trestle 7 is fixed on the feed shaft 8, and an end has been fixed fore-stock 9, links to each other with the cam up and down 11 that is fixed on lower shaft 1, and slide block 12 and the pedestal 13 that is fixed fit by axle 10 and fore-stock 9.Feeding 14 is fixed near the central authorities of pedestal 13.

Mechanism's key diagram when Fig. 2 is the occurred level motion.With Fig. 2-1 be benchmark lower shaft 1 when the direction of arrow is rotated, the sliding surface 4a of control agent 4 is to the direction of arrow, medium-height trestle 7 rotates to the circular arc direction of arrow by connecting ring 6.The rotational angle that Sui lower shaft 1 advances, and circulation becomes Fig. 2-2 → Fig. 2-3 → Fig. 2-4 → Fig. 2-1, and fore-stock 9 is the center with horizontal feed axle 8, does circular arc and waves.

Fig. 3 is explanation feed arrangement background technology figure.One end of fore-stock 9 is fixed on the slide block 12 that the cam up and down 11 of lower shaft 1 joins and connects by being installed in the axle 10 on the pedestal 13, being rotated freely.1. fore-stock 9 is in 3-1 figure state with the motion of cam 11 up and down, and 3-4 figure state does not have the illustrated axle of going up to rotate 1 one circles 4. the time, and meanwhile lower shaft 1 also rotates 1 one circles, is 1. carried out the transition to 2. 3. 4. by state.The figure on each figure top (a), the expression fore-stock 9 and the resultant motion track of cam 11 up and down show the position when feeding 14 A end B end is in various state, the faying face of A end B end becomes and does not have sign among the figure, the feeding face that contacts with cloth above the needle plate.1. face AB state is that forward tilts, and 2. state is that negative sense tilts, and 3. state is that negative sense tilts, and 4. state is the motion that negative sense tilts.And the A of feeding 14 end, closely shake the center than B termination, the overhanging amount of moving up and down on plane is littler than B end amount of movement on needle plate, its result,＜the B end, the amount of movement difference of feeding front and back end causes the work feed shakiness for A end amount of movement.

Summary of the invention

The purpose of this utility model is: with the straight-line mechanism of level, vertical direction, which position no matter the feeding that drives cloth-feeding device be positioned at, and the motion track of feeding is all consistent, thereby make moving of cloth stable.

The utility model is achieved in that a kind of cloth-feeding device of Sewing machines, comprises feeding, feeding pedestal.On the part of the camshaft up and down that the driving shaft parallel with lower shaft intersects vertically, having installed provides the cloth-feeding device of the cam of power up and down.

In the utility model, rely on the slidably feeding pedestal of the installation on the camshaft up and down that intersects vertically with driving shaft, oscillating motion is converted to rectilinear motion.

In the utility model, the cam on the camshaft up and down that driving shaft intersects vertically contacts with straight-line feeding pedestal.On the feeding pedestal, install sliding block, make the rotation of cam be converted to vertical motion.On feeding pedestal top feeder has been installed.

In the utility model, the driving shaft that intersects vertically and up and down the gear position of camshaft one end be the transmission means of taper engagement with axle.

The beneficial effects of the utility model are: which position no matter the feeding of cloth-feeding device of the present utility model be positioned at, and track is all consistent, thereby make moving of cloth stable.Thereby, solved the cloth-feeding device of used Sewing machines, because it advances to tie the amount of movement difference of front and back end, cause the work feed shakiness, impact the defective of sewing quality.

Description of drawings

Fig. 1. the structure oblique view of background technology;

Fig. 2. the mechanism map during the occurred level motion;

Fig. 3. the feeding state transition graph of background technology;

Fig. 4 a. structure oblique view of the present utility model;

Profile when Fig. 4 b. gear of the present utility model combines with axle;

Fig. 5. feeding state transition graph of the present utility model;

Fig. 6. mechanism of the present utility model configuration oblique view.

Symbol description

1. lower shaft 2. horizontal cam 3. bars 4. control agents 5. slide blocks 6. connecting rings 7. medium-height trestles

8. 10. 12. slide blocks of cam about in the of 11. of horizontal feed axle 9. fore-stocks, 13. pedestals

14. feeder 15. gears 16. gears 17. driving shafts 18. bevel gears 19. bevel gears

20. camshaft 21. feeding pedestals 22. pressing plates slide block 24. connecting rings 25. packing rings about in the of 23. up and down

The specific embodiment

Embodiment below in conjunction with accompanying drawing is described in further detail the utility model:

Fig. 4 a is a structure oblique view of the present utility model, the profile of Fig. 4 b when to be gear of the present utility model with axle combine.Fig. 5 is a state transition graph of the present invention.Among Fig. 4 a, described lower shaft 1 is parallel with driving shaft 17, and fixed gear 15 on the lower shaft 1, and fixed gear 16 on the driving shaft 17, gear 15 and gear 16 engaged transmission.Driving shaft 17 1 ends are installed bevel gear 18, and camshaft 20 1 ends are installed bevel gear 19 up and down, and bevel gear 18 and driving shaft 17 and bevel gear 19 form awl T types with camshaft 20 up and down, tighten combination with bolt.Camshaft 20 is installed on the H2 face parallel with plane H1 on the needle plate shown in Figure 6 up and down; Cam 20a is installed in the approaching centre of camshaft 20 up and down.

Described slip is the feeding pedestal 21 of camshaft 20 up and down, links to each other by a type bolt with connecting ring 24 with fore-stock 9 on being fixed on horizontal feed axle 8.With this, convert the oscillating motion of horizontal feed axle 8 rectilinear motion of feeding pedestal 21 to, and realize horizontal movement.Slide block 23 up and down moving up and down has been installed in the centre position of feeding pedestal 21, and the slide section 23a of slide block 23 contacts with cam 20a by making up and down, makes the lift of cam 20a be converted to the vertical motion of slide block 23 up and down.And slide block 23 companion Sui the horizontal movement of giving feeding pedestal 21 and make cam 20a produce slip up and down.Packing ring 25 has been installed in the upper end of slide block 23 up and down, fits installation with feeding 14.

Fig. 5 is a state transition graph of the present utility model.Fig. 5-1 be state 1., Fig. 5-4 is a state 4. the time, lower shaft 1 changes 1 time, the coordinate position of the AB end of the figure of each state diagram (a) expression feeding 14.State is 1. the time, and the face that the AB of feeding 14 end joins is lower than plane on the needle plate, and is parallel with needle plate, state is 2. the time, and is consistent with plane on the needle plate, and state is the most overhanging 3. the time, even the state that is positioned at is also consistent with plane on the needle plate 4. the time, with plane parallel on the nonangular needle plate.The track of the AB end of feeding 14 becomes consistent.

The utility model is that pedestal 21 can make with the axle 20 of the mobile parallel installation of the cloth feeding direction of feeding 14 and slides, parts 23 moving up and down have been installed in horizontal movement on this pedestal, make feeding 14 no matter be positioned at which position, track is all consistent, thereby makes moving of cloth stable.

The cloth-feeding device of the utility model Sewing machines is not limited to the above embodiments, and the change that those skilled in the art make unsubstantiality all falls into protection domain of the present utility model.

Claims (2)

1. the cloth-feeding device of a Sewing machines, comprise feeder (14), feeding pedestal (21), it is characterized in that: on the part of the camshaft up and down (20) that the driving shaft (17) parallel with lower shaft (1) intersects vertically, having installed provides the cam (20a) of power up and down.

2. the cloth-feeding device of Sewing machines as claimed in claim 1 is characterized in that: rely on the camshaft up and down (20) that intersects vertically with driving shaft (17) to go up the slidably feeding pedestal of installing (21), oscillating motion is converted to rectilinear motion.

3. the cloth-feeding device of Sewing machines as claimed in claim 1 or 2, it is characterized in that: the cam (20a) on the camshaft up and down (20) that driving shaft (17) intersects vertically contacts with straight-line feeding pedestal (21); Installing sliding block (23) on feeding pedestal (21) makes the rotation of cam (20a) be converted to vertical motion; On feeding pedestal (21) top feeder (14) has been installed.

4. the cloth-feeding device of Sewing machines as claimed in claim 1 is characterized in that: the driving shaft that intersects vertically (17) and up and down the gear position of camshaft (20) one ends be taper engagement transmission means with axle.

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