CN220907839U - Pressing rod of sewing machine - Google Patents

Abstract

The utility model provides a press rod of a sewing machine, and belongs to the technical field of sewing machines. According to the utility model, the adjusting mechanism is arranged between the upper rod body and the lower rod body of the rod body, the sleeve of the adjusting mechanism is in threaded connection with the rotating rod, the rotating rod is fixedly connected with the rotating disc sleeved outside the sleeve, so that an operator can drive the rotating rod to rotate relative to the sleeve through rotating the rotating disc, the total length of the rod body is adjusted, the sleeve is provided with the plurality of limiting teeth, the rotating disc is provided with the limiting piece matched with the limiting teeth, the temporary limiting of the adjusting mechanism after adjustment can be realized, the problem of incorrect adjustment is prevented, the total length of the rod body can be increased through the adjusting mechanism under the condition that the elastic force of the presser foot spring is weakened, the compression amount of the presser foot spring is increased, the pressure of the presser foot is maintained, the presser foot can work normally, the machine is not required to be disassembled for maintenance, the parts are not required to be replaced, the operation is convenient, and the maintenance cost is reduced.

Description

Pressing rod of sewing machine

Technical Field

The utility model relates to the technical field of sewing machines, in particular to a pressing rod of a sewing machine.

Background

The sewing machine is used as main equipment in the clothing manufacturing industry, is equipment for sewing split material heads into an integral structure, has extremely high utilization rate, and in order to improve the flatness and accuracy during sewing and ensure the sewing quality, a presser foot is generally adopted to press the material heads to be sewn.

Currently, a presser foot lifting assembly of a presser bar of a sewing machine currently available on the market, such as a presser bar recorded in a sewing machine disclosed in patent CN113668146B, comprises a vertically extending presser bar, a presser foot mounted at the lower end of the presser bar, and a guide frame fixed at the upper end of the presser bar, wherein the presser bar is mounted in a sewing machine shell in a vertically movable manner, the output end of a driving source is connected with a driving crank and drives the driving crank to rotate, the driving crank drives the guide frame to move upwards through an automatic tyre presser foot clutch assembly, and the guide frame drives the presser bar and the presser foot to move upwards together, so that the presser foot is automatically lifted. In addition, the depression bar is worn to establish in a bush with reciprocating, the bush is fixed in the casing, the upper end of depression bar has been cup jointed a presser foot spring, the presser foot spring pushes down the depression bar, thereby make the presser foot have decurrent effort, make the presser foot have the pressure of pushing down the cloth on the faller, be connected with a presser foot spring with the actuating structure and be connected with the upper end of depression bar promptly, the presser foot is installed to the lower extreme of depression bar, during the use, the presser foot spring applys decurrent pressure to the depression bar, make the presser foot push down the cloth, and when need lifting the presser foot, upward move through the depression bar that actuating structure drove, the depression bar overcomes the elasticity of presser foot spring and lifts, thereby make the presser foot lift. The structure can meet the purpose that the presser bar drives the presser bar to move up and down, but because the presser bar presses the cloth by the elasticity applied to the presser bar by the presser bar spring, after long-time use, the fatigue problem of the presser bar spring can occur, so that the problem that the presser bar does not press the cloth is caused, and the manufacturing quality is affected.

Disclosure of Invention

The aim of the present invention is to provide a presser bar of a sewing machine, which is provided with a presser bar with an adjusting mechanism, wherein the total length of the presser bar is adjusted by the adjusting mechanism, so that the length of the presser bar can be adjusted to compensate the weakened acting force of the presser bar spring under the condition that the elastic force is weakened due to fatigue of the presser bar spring after long-time use, the presser bar can be continuously used under the condition that the presser bar spring is replaced without disassembling the sewing machine, the manufacturing efficiency is improved, the maintenance cost is reduced, and the manufacturing quality is ensured.

The specific technical scheme is as follows:

A sewing machine presser bar having the feature of comprising: the rod body is divided into an upper rod body and a lower rod body, the lower end of the lower rod body is provided with a presser foot installation part, the presser foot is installed on the presser foot installation part, an adjusting mechanism is arranged between the upper end of the lower rod body and the lower end of the lower rod body, and

The adjusting mechanism comprises a sleeve, a rotating rod, a rotating disc and a limiting piece, wherein one end of the sleeve is fixed at the lower end of the upper rod body and is coaxially arranged with the upper rod body, one end of the rotating rod is inserted into one end of the sleeve, which deviates from the upper rod body, the rotating rod is in threaded connection with the sleeve, the upper end of the lower rod body is arranged on one end of the rotating rod, which deviates from the sleeve, and the rotating rod is coaxially arranged with the rotating rod, the rotating disc is sleeved outside the sleeve, one end of the rotating disc is fixed on the middle part of the rotating rod, meanwhile, a plurality of limiting teeth are arranged on the outer wall of the sleeve, the limiting piece is an elastic piece, and one end of the limiting piece is arranged on the rotating disc and extends between the two limiting teeth.

The pressing rod of the sewing machine is characterized in that a spring mounting hole is formed in one end, deviating from the lower rod body, of the upper rod body along the axial direction of the upper rod body, and one end of the presser foot spring is inserted into the spring mounting hole.

The sewing machine compression bar comprises a sleeve, wherein the sleeve comprises a connecting seat and a loop bar, one end of the connecting seat is fixedly connected with an upper rod body, the loop bar is a hollow bar with internal threads, one end of the loop bar is fixedly connected with the center of the connecting seat, and limiting teeth are arranged on the outer wall of the loop bar.

The sewing machine pressing rod is characterized in that the connecting seat and the loop bar are of an integrated structure, and the cross section diameter of the connecting seat is larger than that of the loop bar.

The press rod of the sewing machine comprises a fixed seat and a screw rod, wherein one end of the fixed seat is fixedly connected with the lower rod body, one end of the screw rod is fixedly connected with the center of the fixed seat, and the other end of the screw rod extends into the loop rod and is in threaded connection.

The above-mentioned sewing machine depression bar, wherein, fixing base and screw thread are integrated into one piece structure to, the cross section diameter of fixing base is greater than the cross section diameter of screw rod in order to form the installation step between fixing base and screw rod.

The pressing rod of the sewing machine is characterized in that the turntable is arranged in a cylindrical shape, one end of the turntable is fixed on the mounting step, and the outer diameter of the cross section of the turntable is consistent with the diameter of the fixing seat and the diameter of the connecting seat.

The pressing rod of the sewing machine is characterized in that a gap is arranged between the inner wall of the rotary table and the outer wall of the loop bar, a jack penetrating through the side wall is formed in the side wall of the rotary table, and the limiting piece is inserted into the jack, one end of the limiting piece extends to the outer wall of the loop bar and is matched with the limiting teeth.

The pressing rod of the sewing machine is characterized in that the hole wall of the insertion hole is provided with the limiting protrusion, the limiting piece is provided with the clamping hole, and when the limiting piece is inserted into the insertion hole, the limiting protrusion is clamped into the clamping hole.

The sewing machine pressing rod is characterized in that a plurality of limiting teeth are distributed on the outer wall of the loop bar in a spiral line mode along the axial direction of the loop bar.

The technical scheme has the positive effects that:

The utility model provides a sewing machine depression bar, through set up adjustment mechanism between the last body of rod and the lower body of rod of depression bar, and adjustment mechanism includes the sleeve, the bull stick, carousel and spacing piece, telescopic one end is connected with last body of rod, the one end of bull stick is connected with the lower body of rod, and the other end and telescopic other end threaded connection of bull stick, simultaneously, the sleeve overcoat is equipped with the carousel, and the carousel is fixed in on the bull stick, simultaneously, be provided with a plurality of spacing teeth on the telescopic outer wall, and be provided with the spacing piece that corresponds with spacing tooth on the carousel, make when needing to adjust depression bar length, the accessible rotates the carousel, realize length adjustment through bull stick and telescopic relative rotation, realize spacing each other through spacing piece at spacing tooth's cooperation simultaneously, prevent the problem of maloperation appears under the circumstances that no external force rotated the carousel, the security is higher.

Drawings

FIG. 1 is a block diagram of an embodiment of a presser bar of a sewing machine according to the utility model;

fig. 2 is an enlarged view of a portion a in fig. 1.

In the accompanying drawings: 1. an upper rod body; 11. a spring mounting hole; 2. a lower rod body; 21. a presser foot mounting part; 3. an adjusting mechanism; 31. a sleeve; 32. a rotating rod; 33. a turntable; 34. a limiting piece; 311. a connecting seat; 312. a loop bar; 321. a fixing seat; 322. a screw; 323. mounting steps; 331. a jack; 332. a limit protrusion; 341. a clamping hole; 3121. and a limit tooth.

Detailed Description

In order to make the technical means, the creation features, the achievement of the purposes and the effects of the present utility model easy to understand, the following embodiments specifically describe the technical solution provided by the present utility model with reference to fig. 1 to 2, but the following disclosure is not limited to the present utility model.

FIG. 1 is a block diagram of an embodiment of a presser bar of a sewing machine according to the utility model; fig. 2 is an enlarged view of a portion a in fig. 1. As shown in fig. 1 and 2, the press bar of the sewing machine provided in this embodiment includes: the upper end of the upper rod body 1 is connected with the driving structure, the lower end of the lower rod body 2 is provided with a presser foot installation part 21, the presser foot is installed through the presser foot installation part 21, installation of the presser foot on the rod body is achieved, meanwhile, the adjusting mechanism 3 is arranged between the lower end of the upper rod body 1 and the upper end of the lower rod body 2, adjustment of the distance between the upper rod body 1 and the lower rod body 2 is achieved through the adjusting mechanism 3, adjustment of the total length of the rod body is achieved, namely, when the elastic force is weakened due to fatigue of the presser foot spring after a subsequent sewing machine is used for a long time, the total length of the rod body is increased, the compression amount of the presser foot spring is increased, the presser foot spring can maintain original pressure of the presser foot, the presser foot can stably press cloth, normal use of the presser foot is guaranteed, and the whole process only needs to adjust the adjusting mechanism 3 on the rod body, maintenance is not needed, parts are not needed to be replaced, operation is more convenient, maintenance cost is lower, and use of the sewing machine is facilitated.

Specifically, the adjusting mechanism 3 disposed on the rod body further includes a sleeve 31, a rotating rod 32, a rotating disc 33, and a limiting plate 34. At this time, one end of the sleeve 31 is fixed at the lower end of the upper rod body 1 and is coaxially arranged with the upper rod body 1, preferably, the sleeve 31 is welded with the upper rod body 1, and the connection is more reliable. Meanwhile, one end of the rotating rod 32 is inserted into one end of the sleeve 31, which is far away from the upper rod body 1, and the rotating rod 32 is in threaded connection with the sleeve 31, namely, when the rotating rod 32 rotates and the position of the sleeve 31 is kept unchanged, the rotating rod 32 can reciprocate along the axial direction of the rotating rod 32 and the axial direction of the sleeve 31, so that the position of the rotating rod 32 on the sleeve 31 is adjusted, and conditions are provided for adjusting the total length of the rod body through an adjusting mechanism 3.

In addition, the upper end of the lower rod body 2 is mounted on the end of the rotating rod 32 away from the sleeve 31, and preferably, the rotating rod 32 is welded with the lower rod body 2. And, the lower rod body 2 and the rotating rod 32 are coaxially arranged, so that when the rotating rod 32 is mounted on the sleeve 31, the lower rod body 2, the rotating rod 32, the sleeve 31 and the upper rod body 1 can maintain a coaxial state, and the stress uniformity of each structure is ensured.

In addition, locate the sleeve 31 with carousel 33 cover outside, carousel 33 can rotate for sleeve 31 to, the one end of carousel 33 is fixed in on the middle part of bull stick 32, has realized the fixed connection of carousel 33 and bull stick 32 promptly, and when rotating carousel 33, carousel 33 can drive bull stick 32 rotation promptly, thereby realizes the rotation of bull stick 32 for sleeve 31, satisfies the regulation demand to the body of rod total length, also can adapt to bull stick 32 simultaneously and need one end to stretch into the installation demand of sleeve 31 internal fit. Meanwhile, a plurality of limiting teeth 3121 are further arranged on the circumferential direction of the outer wall of the sleeve 31, in addition, the limiting piece 34 is set to be an elastic piece, the limiting piece 34 is installed on the rotary table 33 and rotates along with the rotary table 33, meanwhile, one end of the limiting piece 34 extends between the two limiting teeth 3121, when adjustment is needed, an operator can rotate the rotary table 33 to realize relative movement of the rotary rod 32 and the sleeve 31, adjustment of the total length of the rod body is realized, at this time, the limiting piece 34 slides between the limiting teeth 3121, and after adjustment is finished, the limiting piece 34 is realized through the limiting teeth 3121, so that temporary limiting of the adjusting mechanism 3 after adjustment is finished is realized, the problem of false rotation of the adjusting mechanism 3 under the condition that the rotary table 33 is not rotated by external force is prevented, and safety and security are higher.

More specifically, the spring mounting hole 11 has been seted up along its axial in the one end that upper rod body 1 deviates from lower rod body 2, and at this moment, inserts the one end of presser foot spring to spring mounting hole 11 in, provides installation space and spacing basis through spring mounting hole 11 for the one end of presser foot spring promptly, can realize hiding the presser foot spring, saves space, can prevent the tip of presser foot spring to appear the skew or break away from the problem again, and the security is higher.

More specifically, the sleeve 31 further includes a connecting seat 311 and a sleeve rod 312, at this time, one end of the connecting seat 311 is fixedly connected with the upper rod body 1, and the sleeve rod 312 is a hollow rod with internal threads, so that the sleeve rod 312 provides conditions for installation and threaded connection of the rotating rod 32. And, the one end of loop bar 312 is fixedly connected with the center of connecting seat 311, has realized the coaxial arrangement of loop bar 312 and connecting seat 311 to, set up spacing tooth 3121 on the outer wall of loop bar 312, provide the condition for follow-up spacing piece 34 can contact spacing tooth 3121.

More specifically, the connecting seat 311 and the loop bar 312 are in an integrally formed structure, so that the overall structural strength of the connecting seat 311 and the loop bar 312 is ensured. And, the cross section diameter of setting connecting seat 311 is greater than the cross section diameter of loop bar 312 for follow-up after the outside cover of loop bar 312 establishes carousel 33, avoid carousel 33 to surpass the problem that connecting seat 311 and lead to the structure protruding, thereby prevented because of the structure protruding and lead to the problem that bumps or interfere with other structural component appears, the security is higher.

More specifically, the rotating rod 32 matched with the sleeve 31 further comprises a fixing seat 321 and a screw 322, and likewise, one end of the fixing seat 321 is fixedly connected with the lower rod body 2, so that stable connection between the sleeve 31 and the lower rod body 2 is realized. Meanwhile, one end of the screw rod 322 is fixedly connected to the center of the fixing seat 321, so that coaxial arrangement of the screw rod 322 and the fixing seat 321 is realized, and the other end of the screw rod 322 extends into the sleeve rod 312 and is in threaded connection, namely, the screw rod 322 is in threaded connection with the sleeve rod 312, so that the length adjustment requirement is met.

More specifically, the fixing seat 321 and the threads of the rotating rod 32 are of an integrated structure, so that the overall structural strength of the fixing seat 321 and the screw 322 is ensured, and the bearing capacity is stronger. And, the cross section diameter of the fixing base 321 is set to be larger than the cross section diameter of the screw rod 322, so that a mounting step 323 is formed between the fixing base 321 and the screw rod 322, and after the subsequent screw rod 322 is mounted in the loop bar 312, the outer edge of the mounting step 323 can exceed the loop bar 312, and a mounting foundation is provided for the subsequent turntable 33 sleeved outside the loop bar 312.

More specifically, the turntable 33 sleeved outside the sleeve 31 and fixedly connected with the rotating rod 32 is arranged in a cylindrical shape, at this time, the turntable 33 is sleeved outside the sleeve rod 312, and at the same time, one end of the turntable 33 is fixed on the mounting step 323, preferably, the turntable 33 is welded to the mounting step 323, so that when an operator rotates the turntable 33, the whole rotation of the rotating rod 32 can be realized. In addition, the outer diameter of the cross section of the turntable 33 is set to be consistent with the diameter of the fixed seat 321 and the diameter of the connecting seat 311, namely, after the turntable 33 is sleeved outside the loop bar 312 and fixedly connected with the fixed seat 321, the outer wall of the turntable 33 can be flush with the outer walls of the fixed seat 321 and the connecting seat 311, in addition, the outer wall of the fixed seat 321 can be set to be flush with the outer wall of the lower rod body 2, and the outer wall of the connecting seat 311 is flush with the outer wall of the upper rod body 1, so that the problem that the turntable 33 after installation cannot protrude outside the rod body is ensured, the movement interference after subsequent installation is prevented, and the normal use is ensured.

More specifically, a space is provided between the inner wall of the turntable 33 and the outer wall of the loop bar 312, so that a certain deformation space is left between the turntable 33 and the loop bar 312, so that the limiting plate 34 mounted on the turntable 33 can have enough space to deform, and thus the end of the limiting plate 34 can slide between the limiting teeth 3121. In addition, a hole 331 penetrating through the sidewall is further formed in the sidewall of the turntable 33, the limiting piece 34 is inserted into the hole 331, and meanwhile, one end of the limiting piece 34 extends to the outer wall of the loop bar 312 and cooperates with the limiting teeth 3121, that is, a mounting space is provided for the limiting piece 34 through the hole 331, so that the mounting of the limiting piece 34 is facilitated.

More specifically, the hole wall of the jack 331 is further provided with a limiting protrusion 332, at this time, a clamping hole 341 matched with the limiting protrusion 332 is formed in the limiting piece 34, and subsequently when the limiting piece 34 is inserted into the jack 331, the limiting protrusion 332 can be clamped into the clamping hole 341, that is, stable installation of the limiting piece 34 in the jack 331 is realized through the limiting protrusion 332 and the clamping hole 341, and the structural installation is more reliable.

More specifically, along the axial direction of the loop bar 312, a plurality of limit teeth 3121 are set to be in spiral line distribution on the outer wall of the loop bar 312, namely, when the rotating disc 33 is rotated to enable the rotating rod 32 to move along the axial direction of the sleeve 31, the rotating disc 33 moves along the rotating rod 32, so that the limit sheet 34 also moves along the axial direction of the sleeve 31 along the rotating rod 32, namely, the limit sheet 34 rotates around the circumferential direction of the loop bar 312 and moves along the axial direction of the loop bar 312, and the limit teeth 3121 in spiral line arrangement can always ensure stable cooperation with the limit sheet 34, so that the structural design is more reasonable.

It is worth noting that the rotation angle of the turntable 33 is a multiple of 360 ° when each rotation, that is, the turntable 33 rotates at least one turn when each rotation, so that the direction of the presser foot can be always maintained inconveniently, and the fine adjustment of the length of the pressing rod is realized under the condition of ensuring the normal use of the presser foot, so that the problem that the presser foot is not tightly pressed due to the weakening of the elastic force of the spring of the presser foot is avoided.

The embodiment provides a press bar of a sewing machine, which comprises a bar body and an adjusting mechanism 3; through setting up adjustment mechanism 3 between the upper rod body 1 of the body of rod and lower rod body 2, and adjustment mechanism's 3 sleeve 31 and bull stick 32 respectively with upper rod body 1 and lower rod body 2 fixed connection, simultaneously, the one end and the sleeve 31 threaded connection of bull stick 32, carousel 33 outside the bull stick 32 still fixedly connected with cover is located outside sleeve 31, make the rotation of operator accessible rotation carousel 33 drive bull stick 32 for sleeve 31, thereby realize the regulation to the body of rod total length, and be provided with a plurality of spacing teeth 3121 outside sleeve 31, be provided with spacing piece 34 with spacing tooth 3121 complex on carousel 33, can realize the interim spacing to adjustment mechanism 3 after adjusting, prevent the problem of out-of-regulation, thereby guaranteed that the presser foot spring's elasticity weakens under the circumstances, can increase the total length of the body of rod through adjustment mechanism 3, thereby increase the compression volume of presser foot spring, the pressure of presser foot maintained, thereby guarantee that the presser foot can normally work, need not tear open the maintenance, the part of need not be changed, convenient operation, maintenance cost has been reduced.

The foregoing is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included in the scope of the present utility model.

Claims (10)

1. A presser bar of a sewing machine, comprising: the rod body is divided into an upper rod body and a lower rod body, the lower end of the lower rod body is provided with a presser foot installation part, the presser foot is installed on the presser foot installation part, the adjusting mechanism is arranged between the upper end of the lower rod body and the lower end of the lower rod body, and

The adjusting mechanism comprises a sleeve, a rotating rod, a rotating disc and a limiting piece, wherein one end of the sleeve is fixed at the lower end of the upper rod body and is coaxially arranged with the upper rod body, one end of the rotating rod is inserted into one end of the sleeve, which is away from the upper rod body, the rotating rod is in threaded connection with the sleeve, the upper end of the lower rod body is installed at one end of the rotating rod, which is away from the sleeve, and the rotating rod is coaxially arranged with the rotating rod, the rotating disc is sleeved outside the sleeve, one end of the rotating disc is fixed at the middle part of the rotating rod, meanwhile, a plurality of limiting teeth are arranged on the outer wall of the sleeve, the limiting piece is an elastic piece, and the limiting piece is installed on the rotating disc, and one end of the limiting piece extends to two parts between the limiting teeth.

2. The presser bar of claim 1, wherein a spring mounting hole is formed in an end of the upper bar body facing away from the lower bar body in an axial direction thereof, and an end of the presser foot spring is inserted into the spring mounting hole.

3. The pressing bar of claim 1, wherein the sleeve comprises a connecting seat and a sleeve rod, one end of the connecting seat is fixedly connected with the upper rod body, the sleeve rod is a hollow rod with internal threads, one end of the sleeve rod is fixedly connected with the center of the connecting seat, and the limiting teeth are arranged on the outer wall of the sleeve rod.

4. A sewing machine presser bar as claimed in claim 3, wherein the attachment seat and the loop bar are of integrally formed construction and the cross-sectional diameter of the attachment seat is greater than the cross-sectional diameter of the loop bar.

5. The presser bar of claim 4, wherein the turning bar comprises a fixing base and a screw, one end of the fixing base is fixedly connected with the lower bar body, one end of the screw is fixedly connected to the center of the fixing base, and the other end of the screw extends into the loop bar and is in threaded connection.

6. The presser bar of claim 5, wherein the holder and the screw are integrally formed, and a cross-sectional diameter of the holder is larger than a cross-sectional diameter of the screw to form a mounting step between the holder and the screw.

7. The presser bar of claim 6, wherein the turntable is arranged in a cylindrical shape, one end of the turntable is fixed to the installation step, and an outer diameter of a cross section of the turntable is identical to a diameter of the fixing seat and a diameter of the connection seat.

8. The presser bar of any one of claims 3 to 7, characterized in that a space is provided between the inner wall of the turntable and the outer wall of the loop bar, a jack penetrating through the side wall is provided on the side wall of the turntable, and the limit piece is inserted into the jack, and one end of the limit piece extends to the outer wall of the loop bar and is matched with the limit tooth.

9. The pressing bar of claim 8, wherein a limiting protrusion is provided on a wall of the insertion hole, a blocking hole is provided on the limiting piece, and the limiting protrusion is blocked into the blocking hole when the limiting piece is inserted into the insertion hole.

10. The presser bar of any one of claims 3 to 7, characterized in that a plurality of the stopper teeth are spirally distributed on an outer wall of the loop bar in an axial direction of the loop bar.