CN215404884U

CN215404884U - Cloth feeding driving mechanism for sewing machine

Info

Publication number: CN215404884U
Application number: CN202120833277.8U
Authority: CN
Inventors: 陈初喜
Original assignee: NINGBO NIUXINGKE SEWING EQUIPMENT CO Ltd
Current assignee: NINGBO NIUXINGKE SEWING EQUIPMENT CO Ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-01-04
Anticipated expiration: 2031-04-22

Abstract

The utility model discloses a cloth feeding driving mechanism for a sewing machine, which comprises a cloth feeding table connected with a cloth feeding tooth and a driving motor fixed on a mounting seat, wherein the mounting seat is provided with a rotatable driving handle through a first rotating shaft; the cloth feeding table is connected with a horizontal driving shaft, and the end part of the horizontal driving shaft is connected with a first crank; the driving handle is movably connected with the first crank through a connecting rod; the driving handle is provided with a sliding groove, a power shaft of the driving motor is connected with a second crank, the second crank is provided with a sliding block capable of rotating, and the sliding block is arranged in the sliding groove in a sliding mode.

Description

Cloth feeding driving mechanism for sewing machine

Technical Field

The utility model relates to the field of industrial sewing machines, in particular to a cloth feeding driving mechanism for a sewing machine.

Background

The utility model patent No. 201911399442.7 discloses a feeding mechanism of a sewing machine, which comprises a main shaft, a main shaft driving part connected with the main shaft, a needle plate, a feed dog arranged below the needle plate, a tooth frame fixedly connected with the feed dog, and a mounting seat rotatably connected with an external shell, wherein the tooth frame is provided with a first end and a second end which are opposite. The main shaft is connected to the first end of the tooth frame, and the main shaft driving part can drive the main shaft to rotate and drive the cloth feeding teeth to do reciprocating translational motion relative to the needle plate through the tooth frame; the feeding mechanism of the sewing machine further comprises a feed dog driving piece, the feed dog driving piece is connected to the second end of the tooth frame, the feed dog driving piece can drive the tooth frame to lift and drive the feed dog to move relative to the needle plate to perform reciprocating lifting motion. The main shaft driving piece can drive the feed dog to translate relative to the needle plate through the main shaft, the feed dog driving piece can drive the feed dog to ascend or descend relative to the needle plate, and the two driving pieces respectively control the translation motion and the ascending and descending motion of the feed dog. However, the ascending or descending driving structure of the feed dog in the prior art is unstable, and the feed stroke of the feed dog cannot be accurately controlled.

Disclosure of Invention

In view of the above-mentioned prior art, the present invention provides a cloth feeding driving mechanism for a sewing machine, wherein a driving motor controls the rotation of a driving handle through a second crank and a sliding block, and the driving handle rotates through a horizontal driving shaft to accurately control the movement stroke of a cloth feeding tooth in the horizontal direction.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a cloth feeding driving mechanism for a sewing machine comprises a cloth feeding table connected with a cloth feeding tooth and a driving motor fixed on a mounting seat, wherein the mounting seat is provided with a rotatable driving handle through a first rotating shaft; the cloth feeding table is connected with a horizontal driving shaft, and the end part of the horizontal driving shaft is connected with a first crank; the driving handle is movably connected with the first crank through a connecting rod; the driving handle is provided with a sliding groove, a power shaft of the driving motor is connected with a second crank, the second crank is provided with a sliding block capable of rotating, and the sliding block is arranged in the sliding groove in a sliding mode.

In order to optimize the technical scheme, the utility model also comprises the following improved technical scheme.

The outer end of the horizontal driving shaft is fixedly connected with a third crank, and the movable end of the third crank is rotatably connected with the first end of the cloth feeding table.

And the second end of the cloth feeding table is connected with the lifting driving shaft through a fourth crank, a first crank and a fifth crank.

Compared with the prior art, the driving motor drives the driving handle to rotate through the second crank, the sliding groove on the second crank and the sliding block in the sliding groove, the driving handle rotates through the horizontal driving shaft to control the movement of the cloth feeding teeth in the horizontal direction, and the hard connection between the driving motor and the horizontal driving shaft in the traditional technology is improved into flexible connection. The sliding block can slide in the sliding groove in an adaptive manner, and the internal stress of a transmission part between the horizontal driving shaft and the driving motor is eliminated in the vertical and horizontal movement processes of the cloth feeding table, so that the cloth feeding table is more accurately driven and controlled, and the service life of a transmission structure is longer.

Drawings

Fig. 1 is a schematic perspective view of a mounting structure according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of the cloth feeding driving mechanism in fig. 1.

Fig. 3 is an assembled exploded view of fig. 2.

Fig. 4 is a front view of a drive motor portion.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 to 4 are schematic structural views of the present invention.

Wherein the reference numerals are: the cloth feeding device comprises a cloth feeding table 1, a first end 1a, a second end 1b, a cloth feeding tooth 11, a mounting seat 2, a driving motor 3, a second crank 31, a sliding block 32, a driving handle 4, a first rotating shaft 41, a sliding chute 42, a horizontal driving shaft 5, a first crank 51, a connecting rod 52, a third crank 53, a lifting driving shaft 6, a fourth crank 61, a first crank 62 and a fifth crank 63.

The utility model relates to a cloth feeding driving mechanism for a sewing machine, which comprises a cloth feeding table 1 connected with a cloth feeding tooth 11 and a driving motor 3 fixed on a mounting seat 2.

The mounting block 2 is provided with a rotatable drive shaft 4 via a first rotation shaft 41. The cloth feeding table 1 is connected with a horizontal driving shaft 5, and the end of the horizontal driving shaft 5 is connected with a first crank 51. The driving handle 4 is movably connected with a first crank 51 through a connecting rod 52. The mounting base 2 is provided with a mounting hole connected with the first rotating shaft 41, and the mounting hole is positioned right above the power shaft of the driving motor 3. One end of the driving handle 4 is rotatably disposed in the mounting hole through a first rotating shaft 41, and the other end can swing around the first rotating shaft 41.

The driving handle 4 is provided with a sliding groove 42, the power shaft of the driving motor 3 is connected with a second crank 31, the second crank 31 is provided with a rotatable sliding block 32, and the sliding block 32 is arranged in the sliding groove 42 in a sliding manner. When the driving motor 3 rotates, the slide block 32 on the second crank 31 can drive the driving handle 4 to rotate. The driving handle 4 drives the horizontal driving shaft 5 to rotate through the connecting rod 52 and the first crank 51.

The outer end of the horizontal driving shaft 5 is fixedly connected with a third crank 53, and the movable end of the third crank 53 is rotatably connected with the first end 1a of the cloth feeding table 1. When the horizontal drive shaft 5 rotates, the movement of the cloth feed table 1 in the horizontal direction is driven by the third crank 53.

The sliding block 32 can slide in the sliding groove 42 in a flexible manner, which improves the hard connection between the driving motor 3 and the horizontal driving shaft 5 in the prior art into a flexible connection. The internal stress of a transmission part between the horizontal driving shaft 5 and the driving motor 3 is eliminated in the vertical and horizontal movement processes of the cloth feeding table 1, so that the driving control of the cloth feeding table 1 is more accurate, and the service life of a transmission structure is longer.

The second end 1b of the cloth feeding table 1 is connected to the lifting drive shaft 6 via a fourth crank 61, a first crank 62 and a fifth crank 63. The lifting driving shaft 6 is linked with a main shaft of the sewing machine, and when the lifting driving shaft 6 rotates, the cloth feeding table 1 is driven to move in the vertical direction through the fifth crank 63, the first crank 62 and the fourth crank 61.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by one skilled in the art without departing from the scope of the utility model.

Claims

1. The utility model provides a work feed actuating mechanism for sewing machine, includes work feed platform (1) be connected with work feed dog (11), fixes driving motor (3) on mount pad (2), characterized by: the mounting seat (2) is provided with a rotatable driving handle (4) through a first rotating shaft (41); the cloth feeding table (1) is connected with a horizontal driving shaft (5), and the end part of the horizontal driving shaft (5) is connected with a first crank (51); the driving handle (4) is movably connected with the first crank (51) through a connecting rod (52); the driving handle (4) is provided with a sliding groove (42), a power shaft of the driving motor (3) is connected with a second crank (31), the second crank (31) is provided with a rotatable sliding block (32), and the sliding block (32) is arranged in the sliding groove (42) in a sliding manner.

2. The feed driving mechanism of claim 1, wherein: the outer end of the horizontal driving shaft (5) is fixedly connected with a third crank (53), and the movable end of the third crank (53) is rotatably connected with the first end (1a) of the cloth feeding table (1).

3. The feed driving mechanism of claim 1, wherein: the second end (1b) of the cloth feeding table (1) is connected with the lifting driving shaft (6) through a fourth crank (61), a first crank shaft (62) and a fifth crank (63).