CN216274697U - Sewing machine - Google Patents

Abstract

The application provides a sewing machine, its characterized in that still has backstitch crank and backstitch crank arm, install the backstitch crank on the output shaft that work feed spindle drive motor has, the articulated backstitch crank arm of backstitch crank, backstitch crank arm hinge connecting rod, it is articulated with the connecting rod to connect the articulated department extension of crank to output shaft below, connects the crank to fix at the work feed spindle, and work feed spindle dynamic connection work feed dog frame, work feed dog seat hinge work feed dog frame is fixed with the work feed dog on the work feed dog frame. The sewing machine utilizes the cloth feeding shaft to drive the swing rod to replace the swing seat to operate, the structure is simplified, and parts do not need to be lubricated in the later period; the sewing machine is more labor-saving in operation by changing the length of the connecting crank. The thread cutting and presser foot lifting driving source of the sewing machine selects the electromagnet, and the cloth feeding shaft driving motor is a stepping motor or a servo motor, so that the integral operation precision is improved.

Description

Sewing machine

Technical Field

The application provides a sewing machine, concretely relates to sewing machine makes technical field.

Background

The swing seat of the sewing machine is an important part for adjusting the needle pitch, is arranged between the connecting rod and the cloth feeding shaft crank, and the needle pitch adjustment and the backstitch are realized by adjusting the angle of the swing seat. In the early days, the needle pitch on the sewing machine is adjusted by rotating the swing seat connected to the rotating shaft, the new needle pitch is generated by adjusting the angle of the swing seat which drives the swing seat to rotate to different angles along the circumferential direction of the axis of the rotating shaft, the manual adjustment of the swing seat is inconvenient, and the adjustment efficiency is low. Many sewing machines carry out the automatically regulated of gauge needle through the motor nowadays, and its process is that the motor drives the swing of gauge needle regulation crank, and then drives the swing of gauge needle regulation connecting rod, finally changes the wobbling range of main shaft drive pay-off axle, realizes the automatically regulated of sewing gauge needle. The swing seat is used as a key part for the operation of the sewing machine, the manufacture is more complicated, the noise is higher in the use process, the fault often occurs, in addition, the stable operation of the swing seat is realized only by the cooperative operation of a lubricating system of the sewing machine, and the lubricating system is needed to be very relevant to the use of the swing seat in the working process.

Disclosure of Invention

To the inconvenient and loaded down with trivial details of the regulation of swing seat among the above-mentioned sewing machine, frequent scheduling problem that breaks down, this application provides a sewing machine, has work feed axle driving motor, connecting rod, connection crank, work feed axle, work feed dental articulator and work feed tooth, its characterized in that still has backstitch crank and backstitch crank arm, work feed axle driving motor has the output shaft, installs the backstitch crank on the output shaft, the backstitch crank is articulated to the backstitch crank arm, backstitch crank arm hinge connecting rod, the articulated connecting crank of connecting rod, the articulated department of connecting crank prolongs to output shaft below and is articulated with the backstitch crank arm, and the connection crank is fixed on the work feed axle, and work feed dental articulatedly is equipped with work feed dental articulator on the work feed dental articulator, and the last fixed mounting of work feed dental.

Preferably, the backstitch crank arm adjusts the swinging angle of the backstitch crank arm according to a certain preset angle of the control system, and the backstitch crank arm enables the cloth feeding teeth to form a new needle pitch under the driving of the cloth feeding shaft driving motor in a back and forth rotating mode, so that the needle pitch adjustment is realized.

Preferably, the feed shaft driving motor drives the feed dog to be in a zero position without front and rear feed motions, and the feed dog is positioned below a needle plate of the sewing machine.

Preferably, the sewing machine is further provided with a control system, the control system gives a new needle pitch to the cloth feeding shaft driving motor to operate in a back and forth rotating mode, the cloth feeding shaft driving motor transmits reciprocating swinging motion to the backstitch crank arm through the output shaft, the backstitch crank arm transmits the reciprocating swinging motion to the cloth feeding teeth through the connecting crank, the cloth feeding shaft and the cloth feeding tooth holder, and the cloth feeding teeth reciprocate on a central line of a backstitch crank arm to swing angles when the cloth feeding teeth are relatively in a zero position on the output shaft.

Preferably, the control system is electrically connected with a cloth feeding shaft driving motor, a thread cutting driving source and a presser foot lifting driving source which are arranged on the sewing machine, the cloth feeding shaft driving motor is arranged on a side machine body of the sewing machine, the thread cutting driving source is arranged under a base of the sewing machine, the presser foot lifting driving source is arranged on one side close to the cloth feeding shaft driving motor, the thread cutting driving source and the presser foot lifting driving source are both electromagnets, and the cloth feeding shaft driving motor is a stepping motor or a servo motor.

Compared with the prior art, the beneficial effects of this application are: the sewing machine is not provided with the swinging seat, the cloth feeding shaft driving motor is used for driving the backstitch crank arm to replace the swinging seat to operate, the structure is simplified, parts do not need to be lubricated in the later period, and the working efficiency is improved; in addition, the operation distance is shortened by changing the length of the parts, so that the purposes of compact structure and stable operation are achieved. This application sewing machine's trimming lifts presser foot driving source and chooses for use the electro-magnet, and step motor or servo motor are chooseed for use to work feed axle driving motor, have improved holistic operation precision, have higher use value.

Drawings

FIG. 1 is a schematic view of a sewing machine;

FIG. 2 is a schematic view of a cloth feed shaft driving motor of a sewing machine;

FIG. 3 is a left side view of a cloth feed shaft driving motor of a sewing machine.

Reference numerals: the cloth feeding shaft driving motor 10, the output shaft 11, the backstitch crank arm 12, the backstitch crank 121, the connecting rod 13, the connecting crank 14, the cloth feeding shaft 15, the cloth feeding teeth 16, the needle plate 17, the cloth feeding tooth rack 18, the cloth feeding tooth seat 21, the first electromagnet 19 and the second electromagnet 20.

Detailed Description

Preferred embodiments of the present application will be described in detail below with reference to fig. 1-3, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the scope of protection of the present application will be clearly and clearly defined, and these embodiments are only for illustrating the present invention and are not limited thereto.

As shown in figure 1 and figure 2, the sewing machine of the application is provided with a cloth feeding shaft driving motor 10, a first electromagnet 19, a second electromagnet 20, a needle distance adjusting mechanism, a presser foot lifting mechanism, a thread trimming mechanism, a zero position positioning mechanism and a control system. The cloth feeding shaft driving motor 10 drives the zero position positioning mechanism and the needle pitch adjusting mechanism through the output shaft 11 at different times, so that the zero position positioning and the needle pitch adjusting action of the sewing machine are realized. The electromagnet I19 drives the thread trimming mechanism to perform thread trimming through an output shaft I (not marked), and the electromagnet II 20 drives the presser foot lifting mechanism to perform presser foot lifting through an output shaft II (not marked). The cloth feeding shaft driving motor 10, the first electromagnet 19 and the second electromagnet 20 are electrically connected with a control system of the sewing machine, the cloth feeding shaft driving motor 10 is installed on a side machine body of the sewing machine, the first electromagnet 19 is installed below a base of the sewing machine, and the second electromagnet 20 is installed on one side close to the cloth feeding shaft driving motor 10.

The sewing machine of the application has the following two points: first, do not set up the swing seat, realized that sewing machine also can realize normal sewing work under the technical scheme that does not have the swing seat. The stitch length adjusting mechanism can be adjusted by the drive of the cloth feeding shaft driving motor 10 in a back and forth rotating mode; but also can position the zero position of the feed dog 16 for the zero position positioning mechanism. Second, the length of the connecting crank 14 is extended, so that the sewing machine can be operated more easily.

The needle pitch adjusting mechanism of the sewing machine will be described with reference to fig. 3. The stitch length adjusting mechanism comprises a cloth feeding shaft driving motor 10, a backstitch crank arm 12, a backstitch crank 121, a connecting rod 13, a connecting crank 14, a cloth feeding shaft 15, a cloth feeding tooth 16, a cloth feeding tooth rack 18, a needle plate 17 and a cloth feeding tooth seat 21. The cloth feeding shaft driving motor 10 is provided with an output shaft 11, a backstitch crank arm 12 is installed on the output shaft 11, and the cloth feeding shaft driving motor 10 drives the backstitch crank arm 12 in a back and forth rotating mode, so that the backstitch crank arm 12 adjusts the swinging angle of the backstitch crank arm 12 according to a certain amount of angle preset by a control system, or adjusts the swinging angle to be larger or smaller. The backstitch crank arm 12 is hinged with a crank 14, the connecting crank 14 is fixed on a cloth feeding shaft 15, a cloth feeding tooth seat 21 is installed at one end, close to a cloth feeding tooth 16, of the cloth feeding shaft 15, a cloth feeding tooth frame 18 is arranged on the cloth feeding tooth seat 21 in a matched and hinged mode, and the cloth feeding tooth 16 is fixedly installed on the cloth feeding tooth frame 18. As another technical scheme, a connecting rod 13 can be additionally arranged between the backstitch crank arm 12 and the connecting crank 14 to form a hinge connecting rod 13 of the backstitch crank arm 12, the connecting rod 13 is hinged with the connecting crank 14, and the connecting crank 14 is fixed on the cloth feeding shaft 15. The technical effects achieved by the presence or absence of the connecting rod 13 in the two schemes are the same. In the two schemes, the hinge angle of the backstitch crank arm 12 or the connecting rod 13 and the connecting crank 14 is changed under the influence of the change of the length of the connecting crank 14, so that the sewing machine is more labor-saving to operate through the change, and the purposes of compact structure and stable operation of the sewing machine are achieved.

In addition, the control system changes the position of the backstitch crank arm 12 mounted on the output shaft 11, the changed position is large at will, the changed position determines the size of the needle pitch, the backstitch crank arm completely falls into the operation rotation angle of the cloth feeding shaft driving motor 10, and the cloth feeding teeth 16 finally sew with the new needle pitch, so that one sewing machine can easily realize flexible adjustment of various needle pitches, and the technical defect that the original sewing machine only limits one needle pitch is overcome.

After the stitch length adjustment is completed, the sewing machine performs the sewing work with the new stitch length.

The control system gives a new needle pitch to the cloth feeding shaft driving motor 10 to operate in a back and forth rotating mode, the cloth feeding shaft driving motor 10 transmits the motion to the backstitch crank arm 12 through the output shaft 11 to perform back and forth swinging motion, the backstitch crank arm 12 transmits the motion to the cloth feeding teeth 16 through the connecting crank 14, the cloth feeding shaft 15 and the cloth feeding teeth rack 18, or the backstitch crank arm 12 transmits the motion to the cloth feeding teeth 16 through the connecting rod 13, the connecting crank 14, the cloth feeding shaft 15 and the cloth feeding teeth rack 18, and the cloth feeding teeth 16 have front and back cloth feeding motions, and the front and back cloth feeding motions and the tooth lifting motions transmitted by the tooth lifting shaft of the sewing machine form the sewing and routing motion of the cloth feeding teeth 16. Compared with the prior art, the cloth feeding shaft driving motor 10 realizes the cloth feeding action of the cloth feeding shaft 15 to the cloth feeding teeth 16 in a back and forth rotating mode, and has the advantage of accurate cloth feeding.

Since the backstitch crank arm 12 to which the output shaft 11 is attached and fixed is intended to transmit the source of the oscillation, the same technical effects are obtained by using the backstitch crank 121.

The zero-position positioning mechanism of the sewing machine has the zero-position positioning function of the feed dog 16, the feed dog 16 is required to be in the zero-position without front and back feed actions through the drive of the feed shaft drive motor 10, meanwhile, the feed dog 16 is positioned below the needle plate 17, the influence of the feed dog 16 being higher than the needle plate 17 to sewing materials to be adversely sewed can be effectively avoided, the problem that the existing sewing machine is inaccurate in zero-position positioning is solved, the sewing machine can execute the presser foot lifting action and the thread trimming action on the zero-position of the feed dog 16, the sewing stability is improved, and the sewing quality is improved. When the sewing machine finishes sewing work and needs to perform presser foot lifting action and thread trimming action, the control system enables the feed dog 16 to be in a zero position state through the feed shaft driving motor 10, and the feed dog 16 is relatively reciprocated to swing back on a central line of an angle relative to the backstitch crank arm 12 (or the connecting rod 13) in the zero position state on the position of the backstitch crank arm 12 (or the connecting rod 13) on the output shaft 11.

The above description is only one of the preferred embodiments of the present application, and not intended to limit the scope of the present application, and all modifications that can be made to the equivalent structure or equivalent flow path by using the shape, structure and principle of the present application and the accompanying drawings, or applied to other related fields directly or indirectly are included in the scope of the present application.

Claims (7)

1. The utility model provides a sewing machine, has work feed axle driving motor, connecting rod, connection crank, work feed axle, work feed dental articulator, work feed dental lamina and work feed tooth, its characterized in that still has backstitch crank and backstitch crank arm, work feed axle driving motor has the output shaft, installs the backstitch crank on the output shaft, the articulated backstitch crank arm of backstitch crank, backstitch crank arm hinge connecting rod, the articulated crank that connects of connecting rod, it is articulated with the backstitch crank arm to connect the articulated department of crank extension to output shaft below, connects the crank to fix on the work feed axle, and the work feed shaft is close to work feed tooth and serves and installs work feed dental lamina, and the hinge has work feed dental lamina on the work feed dental lamina, and fixed mounting has the work feed tooth on the work feed dental lamina.

2. The sewing machine of claim 1, further comprising a control system, wherein the backstitch crank arm adjusts the swing angle of the backstitch crank arm by a predetermined amount of angle preset by the control system, and the backstitch crank arm drives the feed dog to form a new stitch pitch by the reciprocating manner of the feed shaft driving motor, so as to realize the stitch pitch adjustment.

3. The sewing machine of claim 1, wherein the feed shaft drive motor drives the feed dog to a zero position without back and forth feed motion, the feed dog being below a needle plate provided in the sewing machine.

4. The sewing machine of claim 2, wherein the control system imparts a new gauge to the feed shaft drive motor to operate in a back and forth rotary motion, the feed shaft drive motor transmitting a back and forth oscillating motion to the backstitch crank arm through the output shaft, the backstitch crank arm transmitting a back and forth oscillating motion to the feed dog through the connecting crank, the feed shaft and the feed dog carrier, the feed dog oscillating back and forth on a centerline of the angle of oscillation of the feed dog relative to the backstitch crank arm when the feed dog is in the zero position on the output shaft.

5. The sewing machine of claim 2, wherein the control system is electrically connected to a feed shaft drive motor, a thread cutting drive source and a presser foot lifting drive source of the sewing machine, the feed shaft drive motor being mounted on a side frame of the sewing machine, the thread cutting drive source being mounted under a base of the sewing machine, the presser foot lifting drive source being mounted on a side adjacent to the feed shaft drive motor.

6. The sewing machine of claim 5, wherein the thread trimming drive source and the presser foot lifting drive source are electromagnets.

7. The sewing machine of claim 1, wherein the feed shaft drive motor is a stepper motor or a servo motor.

Images