CN217479701U

CN217479701U - Improved needle pitch adjusting structure of sewing machine

Info

Publication number: CN217479701U
Application number: CN202221280146.2U
Authority: CN
Inventors: 卢律何
Original assignee: Zhejiang Guanghe Sewing Machine Co ltd
Current assignee: Zhejiang Guanghe Sewing Machine Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-09-23
Anticipated expiration: 2032-05-24

Abstract

The utility model provides a structure is adjusted to sewing machine gauge needle of improvement belongs to sewing machine technical field. This sewing machine needle pitch regulation structure of improvement, including step motor, the swing seat, the needle pitch crank, the needle pitch connecting rod, needle pitch pull rod and reset spring, be connected with on step motor's the motor shaft and lift the presser foot cam, the upper end of needle pitch connecting rod articulates on sewing machine's casing, the lower extreme articulates with the upper end of needle pitch pull rod mutually, the lower extreme of needle pitch pull rod articulates on the swing seat, it is connected with the needle pitch gyro wheel to rotate on the needle pitch connecting rod, the needle pitch gyro wheel supports and leans on the needle pitch crank, reset spring's upper end is connected on the needle pitch pull rod, the lower extreme is connected on sewing machine's bottom plate. The original needle pitch adjusting structure is changed into a structure driven by the abutting needle pitch convex block and the needle pitch connecting rod, and under the same working condition, a larger needle pitch length adjusting range can be realized.

Description

Improved needle pitch adjusting structure of sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine, a sewing machine needle pitch adjusts structure, especially a sewing machine needle pitch adjusts structure of improvement is related to.

Background

Preceding sewing machine in the use, need lift presser foot, adjust the gauge needle action, in current structure, as chinese patent [ patent application number: CN202020963419.8 discloses a sewing machine, which comprises a presser foot component, a stepping motor and a swing seat for adjusting the needle pitch, wherein the stepping motor is used for driving the presser foot component to complete the lifting action and driving the swing seat to complete the rotating swing action, the stepping motor is connected with a presser foot lifting cam, the presser foot lifting cam comprises a needle pitch stroke surface and a presser foot lifting stroke surface, the presser foot component comprises a presser foot lifting lever, a pressure lever and a presser foot, the presser foot is connected to the bottom end of the pressure lever, one end of the presser foot lifting lever is connected with the pressure lever through a linkage mechanism, and the other end of the presser foot lifting lever is used for being matched with the presser foot lifting stroke surface. The needle pitch and the presser foot lifting height of the sewing machine are more controllable. However, in the structure, the needle pitch driving handle is in a connecting rod type structure, so that the swinging amplitude of the swinging seat is relatively small, the adjustable range of the needle pitch is small, and the application range is limited.

Disclosure of Invention

The utility model aims at solving the problems in the prior art and providing an improved needle pitch adjusting structure of a sewing machine.

The purpose of the utility model can be realized by the following technical proposal: the improved needle pitch adjusting structure of the sewing machine comprises a stepping motor and a swing seat, wherein a motor shaft of the stepping motor is connected with a lifting presser foot cam, and the improved needle pitch adjusting structure is characterized by further comprising a needle pitch crank, a needle pitch connecting rod, a needle pitch pull rod and a return spring, the needle pitch crank is connected to the motor shaft of the stepping motor, the upper end of the needle pitch connecting rod is hinged to a shell of the sewing machine, the lower end of the needle pitch connecting rod is hinged to the upper end of the needle pitch pull rod, the lower end of the needle pitch pull rod is hinged to the swing seat, the needle pitch connecting rod is rotatably connected with a needle pitch roller, the needle pitch roller abuts against the needle pitch crank, the upper end of the return spring is connected to the needle pitch pull rod, and the lower end of the return spring is connected to a bottom plate of the sewing machine.

In the improved needle pitch adjusting structure of the sewing machine, the upper end of the needle pitch connecting rod is connected to the shaft sleeve through the pin shaft, and the shaft sleeve is fixedly connected to a machine shell of the sewing machine.

In the above improved structure for adjusting the needle pitch of the sewing machine, the needle pitch connecting rod is made into an S-shape, and the wheel surface of the needle pitch crank abuts against the inner arc surface of the lower end of the needle pitch connecting rod.

In the above improved needle pitch adjusting structure of the sewing machine, the upper end of the return spring is connected to the middle upper part of the needle pitch pull rod, the lower end of the return spring is connected to the positioning plate, and the positioning plate is fixedly connected to the bottom plate of the sewing machine.

In the above improved needle pitch adjusting structure of the sewing machine, the needle pitch length adjusting range of the needle pitch adjusting structure of the sewing machine is 0-7 mm.

In the above improved stitch length adjusting structure of the sewing machine, the range of the forward and reverse rotation angles of the stitch length crank is 0 to 100 °.

In the improved sewing machine needle distance adjusting structure, the motor shaft is sleeved with a presser foot lifting cam, and the presser foot lifting cam is sequentially connected with a presser foot lifting lever, a presser foot lifting pull rod and a presser foot lifting assembly.

Compared with the prior art, the utility model has the advantages of it is following:

1. the original needle pitch adjusting structure is changed into a structure driven by abutting needle pitch convex blocks and needle pitch connecting rods, and under the same working condition, a larger needle pitch length adjusting range can be realized;

2. it resets through reset spring, can avoid needle pitch pull rod swing angle too big and the card that leads to block the situation effectively, and job stabilization nature is better.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of another angle of the present invention.

Fig. 3 is an exploded view of the present invention.

In the figure, 1, a stepping motor; 2. a motor shaft; 3. a needle pitch crank; 4. a needle pitch link; 5. a needle pitch pull rod; 6. a return spring; 7. a pin shaft; 8. a shaft sleeve; 9. a gauge roller; 10. lifting a presser foot cam; 11. lifting a presser foot lever; 12. lifting a presser foot pull rod; 13. lifting the presser foot assembly; 15. positioning a plate; 16. and (6) positioning the bolt.

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.

Referring to fig. 1-3, the embodiment is an improved needle pitch adjusting structure of a sewing machine, including a stepping motor 1 and a swing seat 14, and further including a needle pitch crank 3, a needle pitch connecting rod 4, a needle pitch pull rod 5 and a return spring 6, wherein the needle pitch crank 3 is connected to a motor shaft 2 of the stepping motor 1, an upper end of the needle pitch connecting rod 4 is hinged to a housing of the sewing machine, a lower end of the needle pitch connecting rod is hinged to an upper end of the needle pitch pull rod 5 through a bolt assembly, a lower end of the needle pitch pull rod 5 is hinged to the swing seat 14, the needle pitch connecting rod 4 is rotatably connected with a needle pitch roller 9, a tread of the needle pitch roller 9 abuts against a tread of the needle pitch crank 3, an upper end of the return spring 6 is connected to the needle pitch pull rod 5, and a lower end of the return spring is connected to a bottom plate of the sewing machine.

Preferably, the upper end of the needle pitch connecting rod 4 is connected to a shaft sleeve 8 through a pin shaft 7, the shaft sleeve 8 is fixedly connected to a shell of the sewing machine, and the shaft sleeve 8 and the motor shaft 2 are arranged in parallel.

Preferably, the needle pitch connecting rod 4 is made into an S shape, the wheel surface of the needle pitch crank 3 is abutted against the inner arc surface at the lower end of the needle pitch connecting rod 4, and when the needle pitch crank 3 rotates along with the motor shaft 2, the needle pitch connecting rod 4 can be driven to rotate around the axis of the shaft sleeve 8, and meanwhile, the needle pitch pull rod 5 is driven to be lifted upwards or lowered downwards.

Preferably, the pitch roller 9 is connected to the connection of the pitch link 4 and the pitch link 5 by a set screw 16.

Preferably, bolted connection is passed through on gauge needle pull rod 5 in reset spring 6's upper end, and reset spring 6's lower extreme is connected on locating plate 15, and locating plate 15 links firmly on sewing machine's bottom plate, and reset spring 6 can avoid gauge needle pull rod 5 swing angle too big effectively and the card that leads to ends the situation, and job stabilization nature is better. Further, the upper end of the return spring 6 is connected to the middle upper part of the needle gage rod 5 through a bolt.

Preferably, the motor shaft 2 is sleeved with a presser foot lifting cam 10, and the presser foot lifting cam 10 is sequentially connected with a presser foot lifting lever 11, a presser foot lifting pull rod 12 and a presser foot lifting assembly 13.

The working principle of the embodiment is as follows: step motor 1 drives gauge needle crank 3 through motor shaft 2 and rotates, gauge needle crank 3 is at the rotation in-process, drive gauge needle connecting rod 4 and gauge needle pull rod 5 motion through supporting gauge needle gyro wheel 9 that leans on its wheel surface, gauge needle connecting rod 4 rotates around the axial lead of axle sleeve 8, gauge needle pull rod 5 goes up and down along with gauge needle connecting rod 4, drive swing seat 14 simultaneously and swing, motor shaft 2 of step motor 1 drives in the course of the work and lifts presser foot subassembly 13 and goes up and down, cooperation swing seat 14 carries out the gauge needle and adjusts.

The range of the forward and reverse rotation angles of the needle pitch crank 3 in the embodiment is 0-100 degrees, under the same size condition, the needle pitch length adjusting range of the needle pitch adjusting structure of the sewing machine can be increased from 0-5 mm to 0-7 mm, and the needle pitch length adjusting range is larger.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a sewing machine gauge needle regulation structure of improvement, includes step motor (1) and swing seat (14), its characterized in that still includes gauge needle crank (3), gauge needle connecting rod (4), gauge needle pull rod (5) and reset spring (6), gauge needle crank (3) are connected on motor shaft (2) of step motor (1), the upper end of gauge needle connecting rod (4) articulates on sewing machine's casing, and the lower extreme is articulated mutually with the upper end of gauge needle pull rod (5), the lower extreme of gauge needle pull rod (5) articulates on swing seat (14), it is connected with gauge needle gyro wheel (9) to rotate on gauge needle connecting rod (4), gauge needle gyro wheel (9) support by on gauge needle crank (3), the upper end of reset spring (6) is connected on gauge needle pull rod (5), and the lower extreme is connected on sewing machine's bottom plate.

2. The improved needle pitch adjusting structure of a sewing machine according to claim 1, wherein the upper end of the needle pitch connecting rod (4) is connected to a shaft sleeve (8) through a pin shaft (7), and the shaft sleeve (8) is fixedly connected to a machine shell of the sewing machine.

3. The improved needle pitch adjusting structure of a sewing machine according to claim 2, wherein the needle pitch connecting rod (4) is made in an S shape, and the wheel surface of the needle pitch crank (3) abuts against the inner arc surface of the lower end of the needle pitch connecting rod (4).

4. The improved needle pitch adjusting structure of sewing machine according to claim 1, wherein the upper end of the return spring (6) is connected to the middle upper part of the needle pitch pull rod (5), the lower end of the return spring (6) is connected to the positioning plate (15), and the positioning plate (15) is fixedly connected to the bottom plate of sewing machine.

5. The improved structure of claim 1, 2, 3 or 4 for adjusting the needle pitch of a sewing machine, wherein the adjustment range of the needle pitch length of the structure for adjusting the needle pitch of a sewing machine is 0-7 mm.

6. The improved needle pitch adjusting structure of a sewing machine according to claim 5, wherein the forward and reverse rotation angle of the needle pitch crank (3) is in the range of 0 to 100 °.

7. The improved needle distance adjusting structure of sewing machine as claimed in claim 1 or 2 or 3 or 4, characterized in that a presser foot lifting cam (10) is sleeved on the motor shaft (2), and the presser foot lifting cam (10) is connected with a presser foot lifting lever (11), a presser foot lifting pull rod (12) and a presser foot lifting assembly (13) in sequence.