CN210458557U - Feeding mechanism and sewing machine with same - Google Patents

Abstract

The utility model discloses a feeding mechanism and have this feeding mechanism's sewing machine. The feeding mechanism comprises a differential tooth frame and a cloth feeding tooth frame, wherein the differential tooth frame and the cloth feeding tooth frame are respectively and correspondingly provided with differential teeth and cloth feeding teeth, and the relative position between the differential tooth frame and the cloth feeding tooth frame along the cloth feeding direction is adjustable, so that the neutral position between cloth feeding tracks formed by the differential teeth and the cloth feeding teeth is adjustable. The feeding mechanism changes the distance between the differential tooth and the cloth feeding tooth by adjusting the relative position between the differential tooth rack and the cloth feeding tooth rack along the cloth feeding direction, thereby changing the neutral position between the cloth feeding tracks formed by the differential tooth and the cloth feeding tooth, shortening the time for the cloth feeding tooth to intervene in feeding by reducing the neutral position between the cloth feeding tracks formed by the differential tooth and the cloth feeding tooth when sewing with small needle pitch, further improving the feeding capacity, and avoiding the problem that the stitch is not uniform as a whole due to the fact that the stitch is dense at the starting sewing stage and causes the unattractive stitch.

Description

Feeding mechanism and sewing machine with same

Technical Field

The utility model relates to a sewing machine technical field, more specifically say, relate to a feeding mechanism. Furthermore, the utility model discloses still relate to a sewing machine including above-mentioned feeding mechanism.

Background

A conventional feed mechanism of a flat seaming machine is generally shown in fig. 8, and comprises a main shaft 03, a feed dog 02, a differential feed dog 01, a differential feed dog 04, a needle pitch regulator assembly 05 and the like. The main shaft 03 is provided with a tooth lifting eccentric part which is sleeved with a tooth lifting sliding block 06 in a sliding manner, the cloth feeding tooth frame 02 and the differential tooth frame 01 are provided with clamping grooves, the clamping grooves are clamped on the upper side and the lower side of the tooth lifting sliding block 06 which are opposite, and the groove bottom of each clamping groove is not in contact with the side face of the tooth lifting sliding block 06 so as to allow the tooth lifting sliding block 06 to move left and right. When the main shaft 03 rotates, the position of the highest point of the eccentric part of the feed lifting teeth continuously changes circumferentially, and further the position of the feed lifting teeth sliding block 06 is driven to continuously change, so that the feed lifting teeth sliding block 06 drives the clamping groove to continuously move up and down, and therefore the up-and-down swinging of the feed delivery tooth frame 02 and the differential tooth frame 01 can be realized, namely, the teeth of the feed delivery tooth frame 02 and the differential tooth frame 01 periodically swing up and down.

A needle pitch regulator of the needle pitch regulator assembly 05 is fixedly sleeved on the main shaft 03 and is provided with a needle pitch eccentric part, the eccentric direction of the needle pitch eccentric part is inconsistent with that of the tooth lifting eccentric part, and the needle pitch regulator and the tooth lifting eccentric part form a preset fixed angle; the cloth feeding tooth frame 02 is connected with a differential cloth feeding tooth frame 04 through a tooth frame screw 021, one end of the differential cloth feeding tooth frame 04 is connected with a needle pitch regulator assembly 05, and the other end of the differential cloth feeding tooth frame 04 is connected with a differential regulating assembly; the differential feed dog 01 is connected with a differential feed connecting rod through a differential feed screw 011, and the differential feed connecting rod is connected with a differential adjusting frame component. When the main shaft 03 rotates, the needle pitch regulator and the main shaft 03 synchronously rotate to drive the differential cloth feeding rack 04 to move back and forth, so that the differential cloth feeding rack 04 drives the cloth feeding tooth rack 02 to move back and forth, meanwhile, the differential cloth feeding rack 04 drives the differential regulating rack component to move, and the differential regulating rack component drives the differential tooth rack 01 to move through the differential cloth feeding connecting rod, so that the back and forth movement of teeth of the cloth feeding tooth rack 02 and the differential tooth rack 01 is realized.

The vertical swing and the forward and backward movement of the teeth of the feed dog carrier 02 and the differential feed dog carrier 01 are combined to form a resultant motion of the teeth, and further an elliptical feed trajectory is formed, wherein the feed trajectory comprises a first feed trajectory 071 corresponding to a small needle pitch and a second feed trajectory 072 corresponding to a large needle pitch (as shown in fig. 9). As can be seen from fig. 9, a certain neutral position exists between the feed trajectories formed by the respective teeth of the feed dog 02 and the differential dog 01, and when the needle pitch is large, the neutral position between the second feed trajectories 072 corresponding to the teeth of the feed dog 02 and the differential dog 01 is small, and when the needle pitch is small, the neutral position between the first feed trajectories 071 corresponding to the teeth of the feed dog 02 and the differential dog 01 is large.

In an actual sewing process, in order to ensure an aesthetic appearance of a cloth stitch, a material is generally fed from an arc-shaped end portion of the presser foot 08 (as shown in fig. 10) so that a needle can start sewing from the end portion of the cloth. As can be seen from fig. 10, only the teeth of the differential dental articulator 01 participate in feeding during initial feeding, and the teeth of the feed dental articulator 02 participate in feeding after the teeth of the differential dental articulator 01 feed the cloth for a distance. Due to the limitation of the structure, the number of teeth of the cloth feeding dental frame 02 is small, the feeding capacity is weak, when the gap between the cloth feeding tracks corresponding to the teeth of the cloth feeding dental frame 02 and the differential dental frame 01 is large, the time for the teeth of the cloth feeding dental frame 02 to intervene is long, stitches are dense easily in the sewing starting stage, the overall density degree of the stitches is inconsistent, the stitches are not attractive, and the requirements of customers cannot be met.

In the feeding mechanism in the prior art, the neutral position between the feeding tracks corresponding to the teeth of the feeding dental frame 02 and the differential dental frame 01 is usually not adjustable, which can only meet the requirement of most customers on the conventional needle pitch, and for some high-end fabrics, the needle pitch required by the customers is very small, at this time, the neutral position between the feeding tracks corresponding to the teeth of the feeding dental frame 02 and the differential dental frame 01 is very large, so that the time for feeding the teeth of the feeding dental frame 02 is too long, which causes the thread traces to be too dense, leads to unattractive stitches, even produces waste products, and leads to rework and the like.

In summary, how to provide a feeding mechanism capable of improving feeding capacity and improving the aesthetic degree of seam lines is a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a feeding mechanism, which has a strong feeding capability and can improve the aesthetic degree of the seam.

Another object of the utility model is to provide a sewing machine including above-mentioned feeding mechanism, has higher pay-off ability, plays the even pleasing to the eye of seam mark.

In order to achieve the above object, the present invention provides the following technical solutions:

a feeding mechanism comprises a differential tooth frame and a cloth feeding tooth frame, wherein differential teeth and cloth feeding teeth are correspondingly arranged on the differential tooth frame and the cloth feeding tooth frame respectively, and the relative position between the differential tooth frame and the cloth feeding tooth frame along the cloth feeding direction is adjustable, so that the neutral position between cloth feeding tracks formed by the differential teeth and the cloth feeding teeth is adjustable.

Preferably, the differential tooth rack is connected with the differential cloth feeding connecting rod through differential tooth screws, the differential tooth rack is provided with first long holes for the differential tooth screws to pass through, and the length direction of the first long holes is the same as the cloth feeding direction.

Preferably, the differential feed screw and the differential feed link are connected by a differential carrier pin.

Preferably, one end of the differential rack pin is provided with an internal threaded hole for threaded connection with the differential thread screw.

Preferably, the differential rack pin is further provided with a guide hole for guiding connection of the differential rack screw and the internal thread hole, the guide hole is communicated with the internal thread hole, and the guide hole and the internal thread hole form a stepped hole.

Preferably, the outer periphery of the differential rack pin is hinged to a sleeve ring at the end of the differential cloth feeding connecting rod, and the differential rack pin is provided with a limiting part for axially limiting two sides of the sleeve ring.

Preferably, one end of the differential rack pin, which is far away from the internal thread hole, is provided with a dismounting part for conveniently unscrewing or screwing the differential rack pin.

Preferably, the feeding mechanism further comprises a cover plate assembly for sealing the feeding mechanism, and an oil seal which is used for facilitating a tool to extend into the dismounting portion is arranged at the position, corresponding to the dismounting portion, of the cover plate assembly.

Preferably, the feed dog frame is connected with the differential feed dog frame through a dog frame screw, the feed dog frame is provided with a second strip hole for the dog frame screw to pass through, and the length direction of the second strip hole is the same as the feed direction.

A sewing machine comprises a feeding mechanism, wherein the feeding mechanism is any one of the feeding mechanisms.

The utility model provides a feeding mechanism, through the relative position along the work feed direction between adjustment differential tooth frame and the work feed tooth frame, change the distance between differential tooth and the work feed tooth, thereby change the neutral between the work feed orbit that differential tooth and work feed tooth formed, in order when small gauge is made up, through reducing the neutral between the work feed orbit that differential tooth and work feed tooth formed, shorten the time that the work feed tooth intervenes the pay-off, thereby promote the pay-off ability, the stitch of avoiding sewing up the stage becomes dense and leads to the stitch whole inhomogeneous, it is not pleasing to the eye to cause the stitch trace.

The utility model provides a sewing machine, including above-mentioned feeding mechanism, have above-mentioned beneficial effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a feeding mechanism according to an embodiment of the present invention (a schematic partial explosion of a differential tooth screw, a differential tooth rack, and a differential tooth rack pin, and a tooth rack for feeding cloth is not shown);

FIG. 2 is a schematic view of the differential dental screw, differential dental frame and differential dental frame pin of FIG. 1 assembled;

FIG. 3 is a schematic view of the feeding mechanism shown in FIG. 1 when the distance between the front differential teeth and the feed teeth is adjusted to be larger;

FIG. 4 is a schematic view of the feeding mechanism shown in FIG. 1 when the distance between the differential teeth and the feed teeth is small after adjustment;

FIG. 5 is a schematic view of a cloth feeding stitch formed when the feeding mechanism shown in FIG. 4 is used for sewing;

FIG. 6 is a schematic structural view of the differential dental frame pin of FIG. 1;

FIG. 7 is a schematic view of the structure of FIG. 6 from another perspective;

FIG. 8 is a schematic view of a conventional feed mechanism of the prior art;

FIG. 9 is a schematic view of a cloth feeding stitch formed when the feeding mechanism shown in FIG. 8 is used for sewing;

FIG. 10 is a schematic view of the feeding mechanism shown in FIG. 8 in a sewing position.

The reference numerals in fig. 1-7 are as follows:

1 is a differential tooth rack, 11 is a differential tooth, 12 is a first long hole, 21 is a cloth feeding tooth, 3 is a differential tooth screw, 4 is a differential cloth feeding connecting rod, 5 is a differential tooth rack pin, 51 is an internal thread hole, 52 is a guide hole, 53 is a dismounting part, 54 is a stop ring, 55 is a sink groove, 6 is a cover plate component, 61 is an oil seal, 71 is a first cloth feeding track, and 72 is a second cloth feeding track;

the reference numerals in fig. 8-10 are as follows:

01 is a differential tooth rack, 011 is a differential tooth screw, 012 is a differential tooth, 02 is a cloth feeding tooth rack, 021 is a tooth rack screw, 022 is a cloth feeding tooth, 03 is a main shaft, 04 is a differential cloth feeding rack, 05 is a needle pitch regulator component, 06 is a tooth lifting slide block, 071 is a first cloth feeding track, 072 is a second cloth feeding track, 08 is a presser foot and 09 is cloth.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a feeding mechanism, its pay-off ability is strong, can improve the pleasing to the eye degree of seam stitch seam. The other core of the utility model is to provide a sewing machine comprising the feeding mechanism, which has higher feeding capacity and even and beautiful thread mark.

Referring to fig. 1 to 7, fig. 1 is a schematic structural diagram of a feeding mechanism according to an embodiment of the present invention (a differential tooth screw, a differential tooth rack, and a differential tooth rack pin are partially exploded, and a feeding tooth rack is not shown); FIG. 2 is a schematic view of the differential dental screw, differential dental frame and differential dental frame pin of FIG. 1 assembled; FIG. 3 is a schematic view of the feeding mechanism shown in FIG. 1 when the distance between the front differential teeth and the feed teeth is adjusted to be larger; FIG. 4 is a schematic view of the feeding mechanism shown in FIG. 1 when the distance between the differential teeth and the feed teeth is small after adjustment; FIG. 5 is a schematic view of a cloth feeding stitch formed when the feeding mechanism shown in FIG. 4 is used for sewing; FIG. 6 is a schematic structural view of the differential dental frame pin of FIG. 1; fig. 7 is a schematic structural diagram of another view angle of fig. 6.

The utility model provides a feeding mechanism, including differential dental articulator 1 and work feed dental articulator, differential dental articulator 1 corresponds respectively with the work feed dental articulator and is equipped with work feed tooth 21 and differential tooth 11, and the relative position along the work feed direction between differential dental articulator 1 and the work feed dental articulator is adjustable to make the neutral between the work feed orbit that work feed tooth 21 and differential tooth 11 formed adjustable.

It can be understood that the smaller the distance between the differential tooth 11 and the feed tooth 21, the smaller the neutral space between the feed trajectory formed by the differential tooth 11 and the feed trajectory formed by the feed tooth 21, the shorter the time for the feed tooth 21 to intervene in feeding, and the stronger the feeding capability; conversely, the greater the distance between the differential tooth 11 and the feed tooth 21, the greater the free space between the two feed trajectories formed by the differential tooth 11 and the feed tooth 21, and the longer the feed tooth 21 takes to intervene in feeding, the weaker the feeding ability.

Therefore, in order to improve the feeding capability, the distance between the differential tooth 11 and the feed tooth 21 should be as small as possible within an allowable range to minimize the gap between the two feed trajectories formed by the differential tooth 11 and the feed tooth 21.

Therefore, the utility model provides a relative position along the work feed direction between differential dental articulator 1 and the work feed dental articulator is adjustable, with through adjusting the relative position along the work feed direction between differential dental articulator 1 and the work feed dental articulator, change the distance between differential tooth 11 and the work feed tooth 21, thereby change the neutral between the work feed orbit that work feed tooth 21 and differential tooth 11 formed, with when making up at the small gauge, through reducing the neutral between the work feed orbit that work feed tooth 21 and differential tooth 11 formed, reduce the time that work feed tooth 21 intervenes the pay-off, thereby promote the pay-off ability, the stitch of avoiding the start-up seam stage becomes dense and leads to the stitch is whole inhomogeneous, cause the start-up stitch to be unsightly.

Of course, the utility model discloses can be to different gauges, through adjusting the relative position along the work feed direction between differential dental articulator 1 and the work feed dental articulator, make both have different relative positions, guarantee that the free position between the work feed orbit that different gauges correspond is minimum.

It should be noted that the large gauge and the small gauge in the present invention are relative concepts, and the specific dimensions of the large gauge and the small gauge are not limited in the present invention, and those skilled in the art can define the large gauge and the small gauge of different fabrics according to the common general knowledge.

In addition, the present invention does not limit the specific value of the minimum neutral position between the feed trajectories corresponding to the respective needle pitches, and the minimum neutral position corresponds to the minimum distance between the feed dog 21 and the differential dog 11 in the feed direction within the structurally allowable range. Of course, the skilled person can make the feed dog 21 and the differential dog 11 have a suitable distance along the feed direction according to the actual requirement, so that a suitable gap is formed between the feed tracks formed by the feed dog and the differential dog to meet the feeding requirement.

As shown in fig. 5, the small elliptical trajectory is a first cloth feeding trajectory 71 corresponding to a small gauge, and the large elliptical trajectory is a second cloth feeding trajectory 72 corresponding to a large gauge.

It should be noted that, in the prior art, the differential dental frame 1 is usually connected with the differential feed link 4 through the differential dental screw 3, and the differential feed link 4 is connected with the differential adjusting frame assembly; the feed dog is typically connected to a differential feed dog by dog screws, one end of the differential feed dog being connected to the feed adjuster and the other end being connected to the differential adjuster rack assembly. That is, once the structure of the feed mechanism is determined, the relative position between the differential carrier 1 and the feed carrier in the feed direction is not adjustable.

The utility model discloses a set up at least one of differential tooth frame 1 and work feed tooth frame into the position adjustable along the work feed direction, change the relative position of differential tooth frame 1 and work feed tooth frame along the work feed direction. That is, the relative position between the differential tooth rack 1 and the cloth feeding tooth rack along the cloth feeding direction is adjustable, and the method comprises the following three schemes:

in the first scheme, the position of the differential tooth rack 1 is adjustable, and the position of the cloth feeding tooth rack and the connection relation between the cloth feeding tooth rack and other structures of the feeding mechanism are kept unchanged.

In the second scheme, the position of the differential tooth rack 1 and the connection relation between the differential tooth rack and other structures of the feeding mechanism are kept unchanged, and the position of the cloth feeding tooth rack is adjustable.

In the third scheme, the positions of the differential tooth frame 1 and the cloth feeding tooth frame are both adjustable.

The utility model discloses do not specifically prescribe a limit to the position control mode of differential dental articulator 1 and/or work feed dental articulator, the position control mode of differential dental articulator 1 and work feed dental articulator can be the same, also can be different.

The preferred embodiment of the position adjustment of the differential dental articulator 1 will now be described by way of example.

In order to ensure that the structure, the relative positional relationship and the connection relationship of other structures in the feeding mechanism are kept unchanged as much as possible, in consideration of the convenience of the position adjustment of the differential rack 1, on the basis of the above-described embodiment, the differential rack 1 is connected to the differential feed link 4 by the differential rack screw 3, the differential rack 1 is provided with the first elongated hole 12 for passing the differential rack screw 3 therethrough, and the length direction of the first elongated hole 12 is the same as the feed direction.

That is, in the present embodiment, the first elongated hole 12 is provided in the differential dental articulator 1, and the differential dental articulator 1 is adjusted by fitting and connecting different positions of the first elongated hole 12 to the differential dental screws 3.

When the position of the differential dental articulator 1 needs to be adjusted, the differential dental screws 3 are loosened, then the differential dental articulator 1 is pushed to be close to or far away from the cloth feeding dental articulator, at the moment, along with the position change of the differential dental articulator 1, different positions of the first long holes 12 are moved to the differential dental screws 3 and matched with the differential dental screws, and when the differential dental articulator 1 is adjusted to a proper position, the differential dental screws 3 are tightened.

It can be understood that after the differential tooth screw 3 is screwed, the nut end surface of the differential tooth screw 3 presses the side surface of the differential tooth frame 1, and the differential tooth screw 3 drives the differential tooth frame 1 to move back and forth by friction force under the action of the differential cloth feeding connecting rod 4, so as to realize feeding.

It should be noted that, the length of the first elongated hole 12 is not specifically limited in the present invention, and for convenience of positioning, it is preferable that the two extreme positions at the two ends of the first elongated hole 12 are the positions where the neutral position between the two feed trajectories formed by the differential tooth 11 and the feed tooth 21 corresponding to the maximum gauge and the minimum gauge is the minimum.

In the present embodiment, the specific connection relationship between the differential tooth screw 3 and the differential feed link 4 is not limited, and reference is made to the prior art.

In view of the convenience of connection, as a preferable mode, on the basis of the above-described embodiment, the differential feed screw 3 and the differential feed link 4 are connected by the differential carrier pin 5.

That is, in the present embodiment, the differential rack pin 5 serves as an intermediate adaptor for achieving the indirect connection between the differential tooth screw 3 and the differential feed link 4. Therefore, the differential tooth rack pin 5 can be connected with the differential tooth screw 3 and the differential cloth feeding connecting rod 4 respectively by designing the structure of the differential tooth rack pin 5, so that the connection mode of the differential tooth screw 3 and the differential cloth feeding connecting rod 4 is simple and convenient to realize.

In view of the convenience of connection, on the basis of the above-described embodiment, one end of the differential rack pin 5 is provided with the female screw hole 51 for screwing with the differential screw 3.

That is, in the present embodiment, the direct engagement connection between the differential rack pin 5 and the differential dental screw 3 is realized by providing the female screw hole 51 in the differential rack pin 5.

Further, in addition to the above-described embodiment, the differential rack pin 5 is further provided with a guide hole 52 for guiding the connection of the differential screw 3 with the female screw hole 51, and the guide hole 52 communicates with the female screw hole 51 and forms a stepped hole therebetween.

It can be understood that the guide hole 52 has an axial guiding function for the differential rack pin 5, and can prevent the differential rack pin 5 from being directly screwed with the differential thread screw 3, so that the instability of operation when the differential rack pin 5 and the differential thread screw 3 are just connected can be avoided, and the stability and the convenience of operation of the connection of the differential rack pin 5 and the differential thread screw 3 can be ensured.

In view of the convenience of the connection of the differential carrier pin 5 and the differential feed link 4, in the above embodiments, the outer peripheral portion of the differential carrier pin 5 is hinged to the collar at the end of the differential feed link 4.

That is, in the present embodiment, the differential carrier pin 5 is directly hinged to the collar at the end of the differential feed link 4, and it can be understood that the collar is rotatably fitted over the outer peripheral portion of the differential carrier pin 5.

In order to avoid the collar moving along the axial direction of the differential rack pin 5, on the basis of the above embodiment, the differential rack pin 5 is provided with a limiting part for axially limiting two sides of the collar, so as to avoid the collar moving along the axial direction of the differential rack pin 5 to cause the clamping or deadlocking of the hinge part.

Preferably, on the basis of the above-mentioned embodiment, the end of the differential dental frame pin 5 is provided with a stop ring 54 for preventing the collar from falling out.

It will be appreciated that the stop ring 54 is a flange extending radially outwardly along the end of the differential dental frame pin 5, and the present embodiment stops the collar by providing the flange at the end of the differential dental frame pin 5 to prevent the collar from falling off the differential dental frame pin 5.

Preferably, the stop ring 54 is of integral construction with the differential dental bracket pin 5.

In addition to the above embodiments, the differential carrier pin 5 has a recessed groove 55 in the outer peripheral portion thereof, and a stopper for axially stopping one side of the collar is provided in the recessed groove 55.

That is, in the present embodiment, the limiting member axially limits one side of the collar facing the limiting member.

It can be understood that the peripheral portion of the differential rack pin 5 is provided with the sunken groove 55, so that the lantern ring can be conveniently sleeved from one end of the differential rack pin 5, and after the lantern ring is sleeved in place, the limiting member is embedded or clamped in the sunken groove 55 for fixing.

In view of the limitation of the feeding structure, the differential rack screw 3 is not easy to be disassembled, so that, on the basis of any of the above embodiments, the end of the differential rack pin 5 far from the female screw hole 51 is provided with the disassembling and assembling portion 53 for facilitating the loosening and tightening of the differential rack pin 5.

Specifically, the detaching portion 53 may be a structure that facilitates insertion of a detaching tool, such as a hexagon socket, a cross-shaped sunken groove, or a quincunx socket, provided at an end portion of the differential carrier pin 5. Of course, the detachable portion 53 may be a structure that is provided on the outer periphery of the end of the differential rack pin 5 away from the differential dental screw 3 and facilitates detachment, for example, the outer periphery of the end of the differential rack pin 5 away from the differential dental screw 3 has at least a pair of flat surfaces that are oppositely disposed, so that a tool can be clamped between the two flat surfaces that are oppositely disposed, thereby facilitating application of a rotational force.

That is, in the present embodiment, the differential dental bracket pin 5 and the differential dental screw 3 are loosened and fixed by loosening and tightening the differential dental bracket pin 5.

Specifically, when the differential dental frame pin 5 is unscrewed through the dismounting part 53, the pressing force applied by the nut of the differential dental screw 3 to the side surface of the differential dental frame 1 can be released, so that the relative position of the differential dental frame 1 and the cloth feeding dental frame can be adjusted by pushing the differential dental frame 1, after the differential dental frame 1 is adjusted in place, the differential dental screw 3 is aligned with the internal thread hole 51 of the differential dental frame pin 5, and then the differential dental frame pin 5 is locked by applying a moment to the dismounting part 53.

It can be understood that, normally, the feeding mechanism is enclosed in the casing and the cover plate, so that, in order to facilitate the operation of the dismounting portion 53, on the basis of the above-mentioned embodiment, the feeding mechanism further comprises a cover plate assembly 6 for enclosing the feeding mechanism, and the position of the cover plate assembly 6 corresponding to the dismounting portion 53 is provided with an oil seal 61 for facilitating the insertion of a dismounting tool into the dismounting portion 53.

That is, when the position of the differential rack 1 is adjusted by tightening or loosening the differential rack pin 5, the oil seal of the oil seal 61 corresponding to the detachable portion 53 of the cover plate assembly 6 is simply removed, and the detaching tool is inserted into the detachable portion 53 from the oil seal 61 so as to apply a moment to the detachable portion 53. After the adjustment is completed, the oil seal is installed back to the oil seal 61.

It should be noted that, when the position of the differential rack 1 needs to be adjusted, the main shaft of the feeding mechanism needs to be rotated to the position where the cloth feeding is finished, that is, the position where the cloth feeding teeth 21 and the differential teeth 11 are just below the needle plate, and then the adjustment operation needs to be performed.

Of course, the relative position of the feed dog and the differential feed dog 1 may be adjusted by adjusting the position of the feed dog, and in consideration of the specific manner of adjustment of the feed dog, the feed dog is connected to the differential feed dog by a dog screw, and the feed dog is provided with a second elongated hole for passing the dog screw therethrough, and the length direction of the second elongated hole is the same as the feed direction.

That is, in the present embodiment, the second strip hole is provided on the feed dog, and the different positions of the second strip hole are connected to the dog screw in a fitting manner, so as to adjust the position of the feed dog.

When the position of work feed dental articulator needs to be adjusted, loosen the dental articulator screw, then promote the work feed dental articulator and be close to or keep away from differential dental articulator 1, at this moment, along with the position change of work feed dental articulator, the different positions in second rectangular hole remove to dental articulator screw department and cooperate with it, when work feed dental articulator was adjusted to suitable position, it can to tighten the dental articulator screw again.

It can be understood that after the tooth frame screw is screwed, the nut end face of the tooth frame screw presses the side face of the cloth feeding tooth frame, and under the action of the differential cloth feeding tooth frame, the tooth frame screw drives the cloth feeding tooth frame to move back and forth by means of friction force so as to realize feeding.

It should be noted that the present invention does not specifically limit the length of the second elongated hole.

Of course, the relative positions of the feed dog and the differential dog 1 may be adjusted by adjusting the positions of the feed dog and the differential dog 1 simultaneously, in the manner described above.

In addition to the feeding mechanism, the present invention further provides a sewing machine including the feeding mechanism disclosed in the above embodiments, and the structure of other parts of the sewing machine refers to the prior art, which is not repeated herein.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The above details are provided for the feeding mechanism and the sewing machine with the feeding mechanism. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The feeding mechanism is characterized by comprising a differential tooth frame (1) and a cloth feeding tooth frame, wherein the differential tooth frame (1) and the cloth feeding tooth frame are respectively and correspondingly provided with differential teeth (11) and cloth feeding teeth (21), and the relative position between the differential tooth frame (1) and the cloth feeding tooth frame along the cloth feeding direction is adjustable, so that the neutral position between cloth feeding tracks formed by the differential teeth (11) and the cloth feeding teeth (21) is adjustable.

2. The feeding mechanism according to claim 1, characterised in that said differential dental frame (1) is connected to a differential feed link (4) by means of differential screws (3), said differential dental frame (1) being provided with a first elongated hole (12) for the passage of said differential screws (3), said first elongated hole (12) having a length direction identical to the feed direction.

3. The feeding mechanism according to claim 2, characterised in that the differential feed screw (3) is connected to the differential feed link (4) by a differential feed dog pin (5).

4. The feeding mechanism according to claim 3, characterised in that one end of the differential rack pin (5) is provided with an internally threaded hole (51) for threaded connection with the differential thread screw (3).

5. The feed mechanism as set forth in claim 4, characterized in that the differential rack pin (5) is further provided with a guide hole (52) for guiding the connection of the differential rack screw (3) with the internally threaded hole (51), the guide hole (52) communicating with the internally threaded hole (51) and both forming a stepped hole.

6. The feeding mechanism according to claim 4, characterized in that the differential feed dog pin (5) has an outer circumference hinged to a collar at the end of the differential feed cloth connecting rod (4), the differential feed dog pin (5) being provided with a stop portion for axially stopping both sides of the collar.

7. The feed mechanism as claimed in any one of claims 4 to 6, characterised in that the end of the differential rack pin (5) remote from the internally threaded hole (51) is provided with a removal portion (53) for facilitating unscrewing or screwing of the differential rack pin (5).

8. The feeding mechanism as recited in claim 7, further comprising a cover plate assembly (6) for closing the feeding mechanism, wherein an oil seal (61) for facilitating the insertion of a tool into the detachable portion (53) is provided at a position of the cover plate assembly (6) corresponding to the detachable portion (53).

9. The feeding mechanism according to claim 1 or 2, wherein the feed dog is connected to the differential feed dog by a dog screw, the feed dog is provided with a second elongated hole for the dog screw to pass through, and the length direction of the second elongated hole is the same as the feed direction.

10. A sewing machine comprising a feed mechanism, wherein the feed mechanism is as claimed in any one of claims 1 to 9.

Images