CN216156105U

CN216156105U - Feeding driving mechanism of sewing machine

Info

Publication number: CN216156105U
Application number: CN202121665135.1U
Authority: CN
Inventors: 王群
Original assignee: Supreme Intelligent Technology Co Ltd
Current assignee: Supreme Intelligent Technology Co Ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2022-04-01
Anticipated expiration: 2031-07-21

Abstract

The utility model discloses a feeding driving mechanism of a sewing machine, which comprises a cloth feeding tooth frame and a first driving motor for driving the cloth feeding tooth frame to reciprocate, wherein a driving shaft of the first driving motor is connected with the cloth feeding tooth frame through a crank sliding block, a first swing arm, a spline shaft and a second swing arm; the spline shaft is connected with a third swing arm, the third swing arm is connected with a fourth swing arm through a connecting rod, and a driving rotating shaft of the fourth swing arm is connected with a needle bar frame capable of swinging. The first driving motor can be used for driving the cloth feeding tooth frame to reciprocate and driving the needle bar frame to swing at the same time, and the cloth feeding tooth frame and the needle bar frame are driven by the same driver, so that the cost can be saved, and the internal structure compactness of the sewing machine is improved.

Description

Feeding driving mechanism of sewing machine

Technical Field

The utility model relates to a sewing machine, in particular to a feeding driving mechanism of the sewing machine.

Background

The utility model patent No. 201510640000.2 discloses a sewing machine, which comprises an upper shaft driven by a first motor, a needle rod thread taking mechanism arranged at the end part of the upper shaft, a lower shaft parallel to the upper shaft, a thread hooking mechanism arranged at the end part of the lower shaft, a tooth rack, feeding teeth fixed on the tooth rack, wherein the upper shaft is connected with the lower shaft through a driving unit, the upper shaft is connected with one end of the tooth rack through a tooth lifting mechanism, and the sewing machine also comprises a second motor, and the second motor is connected with the other end of the tooth rack through a cloth feeding mechanism. The sewing machine uses two motors to respectively drive the feed lifting tooth mechanism and the cloth feeding mechanism which form the feeding mechanism, the second motor is independently used for driving the cloth feeding action of the cloth feeding tooth frame, the output quantity of the cloth feeding mechanism is adjusted by controlling the output quantity of the motors, and then the movement tracks of the tooth frame and the feed feeding tooth can be conveniently changed, and the sewing of various patterns is realized.

Disclosure of Invention

In view of the above-mentioned prior art, the present invention provides a feeding driving mechanism of a sewing machine, which uses a single motor to control the feeding motion of a feeding dog frame, and simultaneously uses the motor to control the swing of a needle bar, thereby improving the efficiency of the motor.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a feeding driving mechanism of a sewing machine comprises a cloth feeding tooth frame and a first driving motor used for driving the cloth feeding tooth frame to reciprocate, wherein a driving shaft of the first driving motor is connected with the cloth feeding tooth frame through a crank block, a first swing arm, a spline shaft and a second swing arm; the spline shaft is connected with a third swing arm, the third swing arm is connected with a fourth swing arm through a connecting rod, and a driving rotating shaft of the fourth swing arm is connected with a needle bar frame capable of swinging.

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

The first driving motor is positioned at the rear part of the sewing machine head, the spline shaft is rotatably arranged in the sewing machine head, the rear end of the spline shaft is connected with the rotating end part of the first swing arm, and the movable end of the first swing arm is provided with a sliding chute; the slider part of the crank slider is slidably mounted with the chute, and the rotating end part of the crank slider is connected with the power output shaft of the first driving motor.

The rotating end part of the second swing arm is connected with the spline shaft, and the feed dog frame is rotationally connected with the movable end part of the second swing arm.

The needle bar frame is provided with a rotating part connected with the driving rotating shaft, a needle bar upper supporting part and a needle bar lower supporting part which are integrally connected with the rotating part; the needle rod is arranged in the needle rod mounting holes of the upper needle rod supporting part and the lower needle rod supporting part in a sliding way.

Two needles are arranged at the lower end of the needle rod.

Compared with the prior art, the feeding driving mechanism of the sewing machine has the advantages that the first driving motor can be used for driving the cloth feeding tooth frame to reciprocate and driving the needle bar frame to swing at the same time, the cloth feeding tooth frame and the needle bar frame are driven by the same driver, the cost can be saved, and the internal structure compactness of the sewing machine is improved.

Drawings

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

Fig. 2 is a schematic perspective view of the feeding driving mechanism at another angle.

Fig. 3 is a front view of fig. 2.

Detailed Description

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

Fig. 1 to 3 are schematic structural views of the present invention.

Wherein the reference numerals are: the cloth feeding gripper comprises a cloth feeding gripper frame 1, a first driving motor 2, a crank slider 3, a slider part 3a, a first swing arm 4, a chute 4a, a spline shaft 5, a second swing arm 6, a third swing arm 7, a connecting rod 71, a fourth swing arm 8, a driving rotating shaft 81, a needle bar frame 9, a rotating part 9a, a needle bar upper supporting part 9b and a needle bar lower supporting part 9 c.

The feeding driving mechanism comprises a cloth feeding tooth frame 1 and a first driving motor 2 used for driving the cloth feeding tooth frame 1 to reciprocate. The driving shaft of the first driving motor 2 is connected with the feed dog frame 1 through a crank sliding block 3, a first swing arm 4, a spline shaft 5 and a second swing arm 6.

The first driving motor 2 is positioned at the rear part of the sewing machine head, the spline shaft 5 is rotatably arranged in the sewing machine head, the rear end of the spline shaft 5 is connected with the rotating end part of the first swing arm 4, and the movable end of the first swing arm 4 is provided with a sliding groove 4 a; the slider part 3a of the crank slider 3 is slidably mounted on the slide groove 4a, and the rotating end part of the crank slider 3 is connected with the power output shaft of the first driving motor 2. The first driving motor 2 can drive the crank block 3 to rotate, and the block part 3a of the crank block 3 drives the first swing arm 4, the spline shaft 5 and the second swing arm 6 to swing around the axis of the spline shaft 5. The rotating end part of the second swing arm 6 is connected with the spline shaft 5, and the movable end part of the second swing arm 6 is rotatably connected with the feed dog frame 1, so that the feed dog frame 1 can be driven to carry out reciprocating feeding motion.

The spline shaft 5 is connected with a third swing arm 7, the third swing arm 7 is connected with a fourth swing arm 8 through a connecting rod 71, and a driving rotating shaft 81 of the fourth swing arm 8 is connected with a needle bar frame 9 capable of swinging. When the first driving motor 2 drives the spline shaft 5 to rotate, the spline shaft 5 synchronously drives the needle bar frame 9 to swing through the third swing arm 7, the connecting rod 71 and the fourth swing arm 8.

The needle bar holder 9 has a rotating portion 9a connected to the drive rotating shaft 81, and a needle bar upper support portion 9b and a needle bar lower support portion 9c integrally connected to the rotating portion 9 a. The needle bar is slidably disposed in needle bar mounting holes of the needle bar upper support portion 9b and the needle bar lower support portion 9 c. Two needles are arranged at the lower end of the needle rod.

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 sewing machine's pay-off actuating mechanism, includes feed dog frame (1), is used for driving feed dog frame (1) reciprocating motion's first driving motor (2), characterized by: a driving shaft of the first driving motor (2) is connected with the cloth feeding tooth frame (1) through a crank sliding block (3), a first swing arm (4), a spline shaft (5) and a second swing arm (6); spline shaft (5) be connected with third swing arm (7), third swing arm (7) be connected with fourth swing arm (8) through connecting rod (71), drive pivot (81) of fourth swing arm (8) are connected with wobbling needle bar frame (9).

2. The feed drive mechanism of claim 1, wherein: the first driving motor (2) is positioned at the rear part of the sewing machine head, the spline shaft (5) is rotatably arranged in the sewing machine head, the rear end of the spline shaft (5) is connected with the rotating end part of the first swing arm (4), and the movable end of the first swing arm (4) is provided with a sliding groove (4 a); the sliding block part (3a) of the crank sliding block (3) is installed with the sliding groove (4a) in a sliding mode, and the rotating end part of the crank sliding block (3) is connected with a power output shaft of the first driving motor (2).

3. The feed drive mechanism of claim 1, wherein: the rotating end part of the second swing arm (6) is connected with the spline shaft (5), and the cloth feeding tooth frame (1) is rotatably connected with the movable end part of the second swing arm (6).

4. The feed drive mechanism of claim 1, wherein: the needle bar frame (9) is provided with a rotating part (9a) connected with the driving rotating shaft (81), a needle bar upper supporting part (9b) and a needle bar lower supporting part (9c) which are integrally connected with the rotating part (9 a); the needle bar is arranged in the needle bar mounting holes of the needle bar upper supporting part (9b) and the needle bar lower supporting part (9c) in a sliding way.

5. The feed drive mechanism of claim 4, wherein: two needles are arranged at the lower end of the needle rod.