阅读说明：本技术 缝纫机上的外挂式送布辅助装置 (External hanging type cloth feeding auxiliary device on sewing machine ) 是由 李海挺 于 2020-04-26 设计创作，主要内容包括：本发明公开了一种缝纫机上的外挂式送布辅助装置,其包括固定在缝纫机机头外侧面且可拆卸的驱动电机、提升机构、送布机构、回位机构及送布杆；所述驱动电机通过旋转轴与提升机构连接并让其带动送布杆抬起或下降；所述送布机构与旋转轴连接并由其带动送布杆来回移动；所述回位机构与提升机构连接并控制提升机构及送布杆回复原位；所述送布杆与缝纫机上的抬压脚机构连接,并由抬压脚机构控制其在不工作状态下的抬起。本发明能进行拆卸并跟同规格任何型号的缝纫机进行配对,让使用成本降低、使用范围较广,并且在使用中不会对布料进行污染。(The invention discloses an external hanging type cloth feeding auxiliary device on a sewing machine, which comprises a driving motor, a lifting mechanism, a cloth feeding mechanism, a return mechanism and a cloth feeding rod, wherein the driving motor is fixed on the outer side surface of a machine head of the sewing machine and can be disassembled; the driving motor is connected with the lifting mechanism through a rotating shaft and drives the cloth feeding rod to lift or descend; the cloth feeding mechanism is connected with the rotating shaft and drives the cloth feeding rod to move back and forth; the return mechanism is connected with the lifting mechanism and controls the lifting mechanism and the cloth feeding rod to return to the original position; the cloth feeding rod is connected with a presser foot lifting mechanism on the sewing machine and is controlled to lift by the presser foot lifting mechanism in a non-working state. The invention can be disassembled and matched with sewing machines of any specifications and types, thereby reducing the use cost, having wider use range and not polluting cloth in use.)

1. The utility model provides an outer hanging work feed auxiliary device on sewing machine which characterized in that: comprises a driving motor (10), a lifting mechanism, a cloth feeding mechanism, a return mechanism and a cloth feeding rod (20), wherein the driving motor is fixed on the outer side surface of a sewing machine head and can be disassembled;

the driving motor (10) is connected with the lifting mechanism through a rotating shaft (11) and drives the cloth feeding rod (20) to lift or descend;

the cloth feeding mechanism is connected with the rotating shaft (11) and drives the cloth feeding rod (20) to move back and forth;

the return mechanism is connected with the lifting mechanism and controls the lifting mechanism and the cloth feeding rod (20) to return to the original position;

the cloth feeding rod (20) is connected with a presser foot lifting mechanism on the sewing machine and is controlled to lift by the presser foot lifting mechanism in a non-working state.

2. An externally-hung cloth feeding auxiliary device on a sewing machine as claimed in claim 1, wherein: the lifting mechanism comprises a lifting connecting rod (30), a lifting wheel (31), a lifting crank (32) and a lifting shaft (33), and the lifting wheel (31) is sleeved on the rotating shaft (11) and is eccentrically arranged with the rotating shaft; one end of the lifting connecting rod (30) is sleeved on the peripheral surface of the lifting wheel (31) and linked with the lifting wheel, and the other end of the lifting connecting rod is connected with the lifting crank (32) and drives the lifting crank to swing back and forth; the other end of the lifting crank (32) is movably sleeved with the lifting shaft (33) and drives the lifting shaft to do arc-shaped swing; the lifting shaft (33) is provided with a lifting pin (34), and the lifting pin (34) is movably connected with the cloth feeding rod (20) and drives the cloth feeding rod (20) to lift or descend.

3. An externally-hung cloth feeding auxiliary device on a sewing machine as claimed in claim 2, wherein: the movable connecting structure of the lifting pin (34) and the cloth feeding rod (20) is as follows: the cloth feeding rod (20) is provided with a long strip through hole (21), the upper end and the lower end of the lifting pin (34) are respectively attached to the upper end and the lower end of the long strip through hole (21), and the lifting pin (34) can transversely displace in the long strip through hole (21).

4. An externally-hung cloth feeding auxiliary device on a sewing machine according to claim 2 or 3, characterized in that: the cloth feeding mechanism comprises a cloth feeding connecting rod (40), a cloth feeding wheel (41), a cloth feeding adjusting crank (42) and a cloth feeding swing rod (43), wherein the cloth feeding wheel (41) is sleeved on the rotating shaft (11) and is respectively arranged eccentrically with the rotating shaft (11) and the lifting wheel (31); one end of the cloth feeding connecting rod (40) is arranged on the cloth feeding wheel (41), and the other end of the cloth feeding connecting rod is connected with a cloth feeding adjusting crank (42) and drives the cloth feeding adjusting crank to swing back and forth; the cloth feeding adjusting crank (42) is provided with an adjusting through hole (44) capable of adjusting the swinging angle of the cloth feeding adjusting crank; one end of the cloth feeding swing rod (43) is connected with the cloth feeding adjusting crank (42), and the other end of the cloth feeding swing rod is connected with the cloth feeding rod (20) and controls the cloth feeding rod to move back and forth.

5. An externally-hung cloth feeding auxiliary device on a sewing machine as claimed in claim 4, wherein: the driving motor is connected with a power transmission mechanism, the power transmission mechanism comprises a driving wheel (12), a transmission belt (13), a driven shaft sleeve (14), a driven wheel (15) and a transmission wheel (16), the driving wheel (12) is inserted and sleeved on an output shaft of the driving motor (10) and is linked with the output shaft, and the driving wheel (12) is connected with the driven shaft sleeve (14) through the transmission belt (13); the driven wheel (15) is connected with the driven shaft sleeve (14) and linked with the driven shaft sleeve, and is connected with the driving wheel (16) through a driving belt (13); the rotating shaft (11) is inserted on the driving wheel (16) and linked with the driving wheel; the cloth feeding swing rod (43) is positioned in the driven shaft sleeve (14) through a ball bearing and can freely rotate in the driven shaft sleeve.

6. An externally-hung cloth feeding auxiliary device on a sewing machine as claimed in claim 5, wherein: the driven shaft sleeve (14) and the driven wheel (15) are of an integrated structure.

7. An externally-hung cloth feeding auxiliary device on a sewing machine as claimed in claim 6, wherein: the return mechanism comprises a clutch (50), a pre-tightening screw (51), a return spring (52) and a return top plate (53), and the clutch (50) is fixedly connected with the lifting shaft (33) and is linked with the lifting shaft; the pre-tightening screw (51) is sleeved on the clutch (50) in a penetrating manner, and the end part of the pre-tightening screw is connected with the lifting crank (32); one end of the return spring (52) is connected with the lifting crank (32), and the other end of the return spring is connected with the return top plate (53); the end of the return top plate (53) is abutted against the side end face of the lifting crank (32).

Technical Field

The invention belongs to the technical field of accessories on a sewing machine, and particularly relates to an externally-hung cloth feeding auxiliary device on the sewing machine.

Background

At present, a sewing machine is provided with a cloth feeding auxiliary device during sewing, and auxiliary materials can be pushed to be matched with a needle head for sewing during sewing; most of the existing cloth feeding auxiliary mechanisms are positioned in the sewing machines, the cloth feeding auxiliary mechanisms and the needle heads of the sewing machines share a power system, and different sewing machines are needed when different cloth articles are sewn, so that the cloth feeding auxiliary devices in the sewing machines can be idle together after a certain type of sewing machine is idle, resource waste is caused, and the use cost is increased (the cloth feeding auxiliary devices are arranged in the sewing machines of different types, and cannot be matched with other types for use after being disassembled); meanwhile, after being added to the crank shaft, lubricating oil of the conventional cloth feeding auxiliary device easily flows down to sewn cloth along the crank shaft, which easily causes cloth pollution; there is a need for improvement.

Disclosure of Invention

The invention aims to provide an externally-hung cloth feeding auxiliary device on a sewing machine, which has the characteristics of capability of being detached and matched with sewing machines of any types and specifications, low use cost, wide use range and no pollution to cloth in use, and overcomes the defects of the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: an external hanging type cloth feeding auxiliary device on a sewing machine comprises a driving motor, a lifting mechanism, a cloth feeding mechanism, a return mechanism and a cloth feeding rod, wherein the driving motor is fixed on the outer side surface of a machine head of the sewing machine and can be detached;

the driving motor is connected with the lifting mechanism through a rotating shaft and drives the cloth feeding rod to lift or descend;

the cloth feeding mechanism is connected with the rotating shaft and drives the cloth feeding rod to move back and forth;

the return mechanism is connected with the lifting mechanism and controls the lifting mechanism and the cloth feeding rod to return to the original position;

the cloth feeding rod is connected with a presser foot lifting mechanism on the sewing machine and is controlled to lift by the presser foot lifting mechanism in a non-working state.

The lifting mechanism comprises a lifting connecting rod, a lifting wheel, a lifting crank and a lifting shaft, and the lifting wheel is sleeved on the rotating shaft and is eccentrically arranged with the rotating shaft; one end of the lifting connecting rod is sleeved on the peripheral surface of the lifting wheel and is linked with the lifting wheel, and the other end of the lifting connecting rod is connected with the lifting crank and drives the lifting crank to swing back and forth; the other end of the lifting crank is movably sleeved with the lifting shaft and drives the lifting shaft to do arc-shaped swing; the lifting shaft is provided with a lifting pin, and the lifting pin is movably connected with the cloth feeding rod and drives the cloth feeding rod to lift up or down.

The movable connecting structure of the lifting pin and the cloth feeding rod is as follows: have rectangular through-hole on the work feed pole, the upper and lower end laminating with the upper and lower end of rectangular through-hole respectively of lifting pin, and the lifting pin can lateral shifting in rectangular through-hole.

The cloth feeding mechanism comprises a cloth feeding connecting rod, a cloth feeding wheel, a cloth feeding adjusting crank and a cloth feeding oscillating bar, and the cloth feeding wheel is sleeved on the rotating shaft and is respectively eccentrically arranged with the rotating shaft and the lifting wheel; one end of the cloth feeding connecting rod is arranged on the cloth feeding wheel, and the other end of the cloth feeding connecting rod is connected with the cloth feeding adjusting crank and drives the cloth feeding adjusting crank to swing back and forth; the cloth feeding adjusting crank is provided with an adjusting through hole capable of adjusting the swinging angle of the cloth feeding adjusting crank; one end of the cloth feeding swing rod is connected with the cloth feeding adjusting crank, and the other end of the cloth feeding swing rod is connected with the cloth feeding rod and controls the cloth feeding rod to move back and forth.

The driving motor is connected with a power transmission mechanism, the power transmission mechanism comprises a driving wheel, a transmission belt, a driven shaft sleeve, a driven wheel and a transmission wheel, the driving wheel is inserted and sleeved on an output shaft of the driving motor and is linked with the output shaft, and the driving wheel is connected with the driven shaft sleeve through the transmission belt; the driven wheel is connected with the driven shaft sleeve and linked with the driven shaft sleeve, and is connected with the driving wheel through a driving belt; the rotating shaft is sleeved on the driving wheel in a plugging way and is linked with the driving wheel; the cloth feeding swing rod is positioned in the driven shaft sleeve through a ball bearing and can freely rotate in the driven shaft sleeve.

The driven shaft sleeve and the driven wheel are of an integrated structure.

The return mechanism comprises a clutch, a pre-tightening screw, a return spring and a return top plate, and the clutch is fixedly connected with the lifting shaft and is linked with the lifting shaft; the pre-tightening screw is sleeved on the clutch in a penetrating way, and the end part of the pre-tightening screw is connected with the lifting crank; one end of the return spring is connected with the lifting crank, and the other end of the return spring is connected with the return top plate; the end part of the return top plate is abutted against the side end face of the lifting crank.

After adopting the structure, compared with the prior art, the invention has the advantages that: the invention adopts the external hanging type and the detachable arrangement, so that sewing machines with the same specification (similar size) can be paired, the use convenience and flexibility are greatly improved, the use range is wide, the use cost of the equipment is greatly reduced, and the equipment is convenient to maintain; the ball bearing on the cloth feeding swing rod which drives the cloth feeding rod to move back and forth is positioned in the thrust shaft sleeve, so that lubricating oil can be prevented from dropping on the sewn cloth during lubrication, and the cloth is prevented from being polluted during sewing.

Drawings

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

Fig. 2 is a schematic view of the clutch structure of the present invention.

Detailed Description

The following description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention, and the present invention is further described with reference to the accompanying drawings and embodiments.