CN211522525U

CN211522525U - Sewing machine lift presser foot buffering subassembly

Info

Publication number: CN211522525U
Application number: CN201922324544.4U
Authority: CN
Inventors: 颜海荣; 谢泽伟
Original assignee: Zhejiang Maqi Sewing Machine Co Ltd
Current assignee: Meiji Technology Group Co ltd
Priority date: 2019-12-21
Filing date: 2019-12-21
Publication date: 2020-09-18
Anticipated expiration: 2029-12-21

Abstract

The utility model provides a sewing machine lift presser foot buffering subassembly belongs to sewing machine technical field. The needle plate pressing device solves the technical problems that when the presser foot falls down, the impact force on the needle rod is too large, the needle plate is damaged, the noise is too large, and the like. The sewing machine comprises a machine shell and a controller, wherein a vertical presser bar is inserted in the machine shell, and a presser foot is fixedly arranged at the lower end of the presser bar; this lift presser foot buffering subassembly includes cylinder and connecting block, and the cylinder is fixed on the casing and vertical setting down, and the piston rod and the connecting block of cylinder link firmly, and the presser bar also links firmly mutually with the connecting block, and the controller is connected with the cylinder electricity. The utility model provides a lift presser foot buffering subassembly and to the impact force of needle bar when can reducing the presser foot whereabouts, avoid the faller to damage, also reduced the noise that the presser foot striking produced on the faller, provide a good environment for workman's work.

Description

Sewing machine lift presser foot buffering subassembly

Technical Field

The utility model belongs to the technical field of sewing machine, a sewing machine lift presser foot buffering subassembly is related to.

Background

The sewing machine is a machine which uses one or more sewing threads to form one or more stitches on a sewing material so as to interweave or sew one or more layers of the sewing material; for the sewing machine capable of automatically lifting the presser foot, particularly the thick material sewing machine, when the presser foot is put down from a lifting state, the impact force of the presser foot is very large, the damage of parts such as a needle plate is easily caused, and the collision of parts can also generate very large noise, which is not beneficial to the health of workers.

Chinese patent (publication number: CN 208980919U; publication date: 2019-06-14) discloses an embroidery machine presser foot lifting device, which comprises a presser foot driving mechanism and a presser foot assembly connected with the presser foot driving mechanism, wherein the presser foot driving mechanism comprises a driving motor, a connecting sleeve is arranged at the output shaft end of the driving motor, a connecting shaft is arranged at the end part of the connecting sleeve, and the connecting shaft end is connected with the presser foot assembly. Preferably, the presser foot assembly comprises a presser foot drive connecting rod, a presser foot small connecting rod movably connected with the presser foot drive connecting rod, and a presser foot drive support movably connected with the presser foot small connecting rod, wherein a presser foot guide part is arranged at the end part of the presser foot drive support, a guide hole and a boss are arranged on the presser foot guide part, and a presser foot buffer block is arranged on the boss.

The presser foot buffer block arranged in the presser foot lifting device of the embroidery machine disclosed in the patent document can reduce the impact of the presser foot on the needle plate when the embroidery machine works, but the problem of large impact force generated when the presser foot descends is not fundamentally solved, and the presser foot buffer block needs to be frequently replaced, which is troublesome.

Disclosure of Invention

The utility model discloses to the above-mentioned problem that prior art exists, provide a sewing machine lift presser foot buffering subassembly, the utility model aims to solve the technical problem that: how to reduce the impact force of the presser foot on the needle plate under the working state.

The purpose of the utility model can be realized by the following technical proposal:

a presser foot lifting buffer assembly of a sewing machine comprises a machine shell and a controller, wherein a vertical presser foot rod is inserted in the machine shell, and a presser foot is fixedly arranged at the lower end of the presser foot rod; the lifting presser foot buffer assembly is characterized by comprising an air cylinder and a connecting block, wherein the air cylinder is fixed on the shell and is arranged vertically downwards, a piston rod of the air cylinder is fixedly connected with the connecting block, a presser foot rod is also fixedly connected with the connecting block, and the controller is electrically connected with the air cylinder.

The working principle is as follows: the presser bar among this technical scheme drives the presser foot and moves about sewing in-process, the controller can control the cylinder action, presser bar from the top down moves, before the presser foot falls to the minimum, controller control cylinder action, make the piston rod upward movement of cylinder, the piston rod passes through the connecting block and provides an ascending pulling force for the presser bar, make the presser foot fall speed slow down, the impact force of presser foot to the needle bar has been reduced, avoid spare parts such as faller to damage because of the impact force is too big, the noise that produces when the presser foot falls also can reduce, make staff's sewing environment improve.

In the presser foot lifting buffer assembly of the sewing machine, the mounting plate is fixedly arranged on the upper side of the machine shell, the shell of the air cylinder is fixedly arranged on the mounting plate, the lower end of the piston rod of the air cylinder is connected with the extension rod, the extension rod is movably inserted into the machine shell, and the extension rod is fixedly connected with the connecting block. The cylinder moves for a long time, and the fixed position of extension bar and connecting block can wear and tear, only need to change the extension bar when necessary can, if the piston rod of cylinder links firmly with the connecting block, it will be very troublesome to change the piston rod of wearing and tearing to the cost is than higher.

In the presser foot lifting buffer assembly of the sewing machine, the extension bar and the presser foot bar are arranged in parallel at intervals, the lower end of the extension bar is fixedly connected with one end of the connecting block, and the upper end of the presser foot bar is fixedly connected with the other end of the connecting block. The connecting block fixed connection presser foot pole and extension bar are convenient for transmit the power that produces by the cylinder piston rod upward movement for the presser foot pole.

In the presser foot lifting buffer assembly of the sewing machine, the connecting block is located in the cavity of the machine shell, vertical mounting holes I and mounting holes II are arranged on the connecting block side by side at intervals, the upper end of the presser foot rod penetrates through the mounting holes I, the lower end of the extension rod is located in the mounting holes II, a threaded hole I communicated with the mounting holes I and a threaded hole II communicated with the mounting holes II are arranged on the outer side surface of the connecting block, a set screw I is screwed in the threaded hole I, the end part of the set screw I abuts against the outer peripheral surface of the middle part or the upper end of the presser foot rod, a set screw II is screwed in the threaded hole II, and the end part of the set screw II abuts against the outer peripheral surface of the lower end of the extension rod. The first mounting hole and the second mounting hole can be through holes or blind holes, and preferably, the first mounting hole penetrates through the through holes in the upper side face and the lower side face of the connecting block, and the second mounting hole is a blind hole extending downwards from the upper side face of the connecting block.

In the presser foot lifting buffer assembly of the sewing machine, the mounting plate is arranged on the upper side of the machine shell and comprises a first transverse mounting part, a second mounting part and a vertical connecting part, the first mounting part is positioned above one side of the second mounting part, one end of the first mounting part is fixedly connected with the upper end of the connecting part, one end of the second mounting part is fixedly connected with the lower end of the connecting part, the mounting plate is fixed on the machine shell through the second mounting part, the cylinder is fixedly arranged on the upper end face of the first mounting part, and the piston rod penetrates through the first mounting part and is sleeved with the extension rod. The one end that installation department one and installation department two phase kept away from is located the both sides of connecting portion respectively, and the mounting panel is installed and dismantled to the facilitate fitting, has the interval between the downside of installation department one and the casing upside, provides bigger space for the motion of extension bar.

In the presser foot lifting and buffering assembly of the sewing machine, the lower side surface of the mounting part II is attached to the upper side surface of the machine shell, the mounting part II is provided with a fixing hole, and a fixing screw in the fixing hole is screwed on the machine shell. The mounting plate can be detached by screwing out the fixing screw, and the mounting plate is convenient to detach.

In the presser foot lifting and buffering assembly of the sewing machine, the machine shell is provided with a guide hole, the upper end of the extension bar penetrates through the guide hole and is positioned above the machine shell, and the extension bar and the piston rod of the cylinder are coaxially arranged. The guiding hole plays the guide effect, and extension bar reciprocates in the guiding hole along with cylinder piston rod.

Compared with the prior art, the utility model provides an extension bar passes through the connecting block rigid coupling with the presser bar, and when controller control cylinder moved, piston rod upward movement was originally lifted the presser bar at the during operation and is cushioned the subassembly and have the advantage that reduces the presser bar to the faller impact force, avoided spare parts such as faller to receive the damage, had reduced the noise because of the presser bar falls down the production.

Drawings

Fig. 1 is a schematic view of the mounting structure of the present presser foot lift cushion assembly.

Fig. 2 is a schematic perspective view of the present presser foot lift cushion assembly.

Fig. 3 is a schematic perspective view of a connecting block in the presser foot lifting buffer assembly.

In the figure, 1, a housing; 1a, a guide hole; 2. a presser bar; 3. a presser foot; 4. a cylinder; 4a, a piston rod; 5. connecting blocks; 5a, mounting holes I; 5b, mounting holes II; 5c, a first threaded hole; 5d, a second threaded hole; 6. mounting a plate; 6a, a first mounting part; 6b, a second mounting part; 6b1, fixing holes; 6c, a connecting part; 7. lengthening a rod; 8. a first set screw; 9. a second set screw; 10. and fixing the screw.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the sewing machine in this embodiment includes a machine case 1 and a controller, a presser bar 2 penetrates through the machine case 1, the presser bar 2 is vertically arranged and the lower end of the presser bar is fixed with a presser foot 3, a presser foot lifting buffer assembly includes a cylinder 4 vertically arranged downwards, a mounting plate 6 is fixedly arranged on the upper side of the machine case 1, the cylinder 4 is fixed on the mounting plate 6, the controller is electrically connected with the cylinder 4, an extension bar 7 is fixedly arranged at the lower end of a piston rod 4a of the cylinder 4, the piston rod 4a of the cylinder 4 is coaxially arranged with the extension bar 7, the extension bar 7 is parallel to the presser bar 2 at intervals, the extension bar 7 is fixedly connected with the presser bar 2 through a connecting block 5, the presser bar 2 can move up and down in the sewing process, before the presser foot 3 falls to the lowest end, the controller controls the cylinder 4 to move up, the piston rod 4a of the cylinder 4 moves up, an upward force is applied to the, the pin pressing rod 2 is equivalently buffered, and the impact force of the pin pressing 3 on a needle board when falling is reduced.

Further, as shown in fig. 1 and 2, the mounting plate 6 includes a first horizontal mounting portion 6a, a vertical connecting portion 6c and a second horizontal mounting portion 6b, one end of the first mounting portion 6a is fixedly connected to the upper end of the connecting portion 6c, a space is provided between the first mounting portion 6a and the upper side of the housing 1, one end of the second mounting portion 6b is fixedly connected to the lower end of the connecting portion 6c, the lower end surface of the second mounting portion 6b is abutted to the upper side of the housing 1, the first mounting portion 6a, the second mounting portion 6b and the connecting portion 6c are integrally formed, the first mounting portion 6a is located above one side of the second mounting portion 6b, the cylinder 4 is fixedly arranged on the upper end surface of the first mounting portion 6a, the piston rod 4a of the cylinder 4 passes through the first mounting portion 6a, the end of the piston rod 4a is located below the first mounting portion 6a, the housing 1 is provided with a guiding hole 1a, the upper end of the extension bar 7 is sleeved on the piston rod 4a, the second mounting part 6b is provided with a fixing hole 6b1, a fixing screw 10 is arranged in the fixing hole 6b1, and the end part of the fixing screw 10 is screwed on the machine shell 1.

Further, as shown in fig. 2 and 3, the connecting block 5 is located in the cavity of the housing 1, vertical first mounting holes 5a and second mounting holes 5b are spaced side by side on the upper side surface of the connecting block 5, the first mounting holes 5a are through holes penetrating through the upper side surface and the lower side surface of the connecting block 5, the second mounting holes 5b are blind holes extending downward from the upper side surface of the connecting block 5, the presser bar 2 is inserted into the first mounting holes 5a, the lower end of the extension bar 7 is located in the second mounting holes 5b, the outer side surface of the connecting block 5 is provided with a first threaded hole 5c communicated with the first mounting holes 5a and a second threaded hole 5d communicated with the second mounting holes 5b, a first set screw 8 is screwed in the first threaded hole 5c, the end of the first set screw 8 abuts against the outer peripheral surface of the middle part or the outer peripheral surface close to the upper end of the presser bar 2, a second set screw 9 is screwed in the second threaded hole 5d, and the end of the second set screw.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A presser foot lifting buffer assembly of a sewing machine comprises a machine shell (1) and a controller, wherein a vertical presser foot rod (2) is inserted into the machine shell (1), and a presser foot (3) is fixedly arranged at the lower end of the presser foot rod (2); the presser foot lifting and buffering assembly is characterized by comprising an air cylinder (4) and a connecting block (5), wherein the air cylinder (4) is fixed on the shell (1) and is vertically arranged downwards, a piston rod (4a) of the air cylinder (4) is fixedly connected with the connecting block (5), a presser foot rod (2) is also fixedly connected with the connecting block (5), and the controller is electrically connected with the air cylinder (4).

2. The presser foot lifting and buffering assembly of sewing machine according to claim 1, wherein a mounting plate (6) is fixedly arranged on the upper side of the machine shell (1), the housing of the cylinder (4) is fixedly arranged on the mounting plate (6), the lower end of the piston rod (4a) of the cylinder (4) is connected with an extension bar (7), the extension bar (7) is movably inserted on the machine shell (1), and the extension bar (7) is fixedly connected with the connecting block (5).

3. The presser foot lifting and buffering assembly of sewing machine according to claim 2, wherein the extension bar (7) is spaced apart from and parallel to the presser bar (2), the lower end of the extension bar (7) is fixedly connected to one end of the connecting block (5), and the upper end of the presser bar (2) is fixedly connected to the other end of the connecting block (5).

4. The presser foot lifting and buffering assembly of the sewing machine according to claim 3, wherein the connecting block (5) is located in the cavity of the machine shell (1), a first vertical mounting hole (5a) and a second vertical mounting hole (5b) are spaced side by side on the connecting block (5), the upper end of the presser foot rod (2) is inserted into the first vertical mounting hole (5a), the lower end of the extension rod (7) is located in the second vertical mounting hole (5b), a first threaded hole (5c) communicated with the first vertical mounting hole (5a) and a second threaded hole (5d) communicated with the second vertical mounting hole (5b) are formed in the outer side surface of the connecting block (5), a first fastening screw (8) is screwed in the first threaded hole (5c), and the end of the first fastening screw (8) abuts against the outer peripheral surface of the middle part or the upper end of the presser foot rod (2), a second set screw (9) is screwed in the second threaded hole (5d), and the end part of the second set screw (9) is propped against the outer peripheral surface of the lower end of the extension bar (7).

5. The presser foot lifting cushion assembly of sewing machine according to claim 2, 3 or 4, the mounting plate (6) is arranged on the upper side of the machine shell (1), the mounting plate (6) comprises a first horizontal mounting part (6a), a second horizontal mounting part (6b) and a vertical connecting part (6c), the first installation part (6a) is positioned above one side of the second installation part (6b), one end of the first installation part (6a) is fixedly connected with the upper end of the connecting part (6c), one end of the second mounting part (6b) is fixedly connected with the lower end of the connecting part (6c), the mounting plate (6) is fixed on the machine shell (1) through the second mounting part (6b), the cylinder (4) is fixedly arranged on the upper end surface of the first mounting part (6a), the piston rod (4a) penetrates through the first mounting part (6a) and is sleeved with the extension rod (7).

6. The presser foot lifting cushion assembly of a sewing machine according to claim 5, wherein a lower side surface of the second mounting portion (6b) abuts against an upper side surface of the machine case (1), a fixing hole (6b1) is formed in the second mounting portion (6b), and a fixing screw (10) screwed to the machine case (1) is provided in the fixing hole (6b 1).

7. The presser foot lifting and buffering assembly of sewing machine according to claim 2, 3 or 4, wherein said housing (1) is opened with a guide hole (1a), the upper end of said extension bar (7) passes through said guide hole (1a) and is located above said housing (1), said extension bar (7) is coaxially arranged with the piston rod (4a) of said cylinder (4).