CN220812866U - Needle pitch adjusting mechanism of overedger - Google Patents

Abstract

The application provides a stitch length adjusting mechanism of an overedger, in particular to the technical field of sewing machines, a slide bar driving crank is fixed on an output shaft of a driving motor, the slide bar driving crank abuts against a driving slide bar, the other end of the driving slide bar is hinged with the stitch length adjusting crank, the stitch length adjusting crank is connected with a fixed stitch length adjusting connecting shaft, the stitch length adjusting connecting shaft is connected with a fixed positioning crank, the tail end of the positioning crank is provided with a clamping block, and the driving motor is driven to indirectly enable the clamping block of the positioning crank to fall into a clamping groove of the stitch length adjusting gear.

Description

Needle pitch adjusting mechanism of overedger

Technical Field

The application provides a stitch length adjusting mechanism of an overedger, and particularly relates to the technical field of sewing machines.

Background

The overedger is the main equipment for overlocking during sewing, and the cloth feeding mechanism of the overedger and the stitch length adjusting mechanism of the overedger are compact and inseparable. The prior art states that: the needle distance adjusting structure of the overedger comprises a main shaft, a cam, a first swing rod, a first hinge shaft, a second swing rod, a connecting swing rod, an adjusting swing rod, a cloth feeding shaft, a fixed seat, a nut and a cloth feeding hinge shaft; the rear surface of the cam is fixedly connected with the tail end of the main shaft; the front surface of the protruding part of the cam is fixedly connected with a cam shaft; the first swing rod is hinged with the cam shaft; one end of the first swing rod, which is far away from the cam shaft, is hinged with the first hinge shaft; the connecting swing rod is hinged with the first hinge shaft; one end of the connecting swing rod, which is far away from the first hinge shaft, is hinged with the cloth feeding hinge shaft; the cloth feeding swing rod is hinged with the cloth feeding hinge shaft; one end of the cloth feeding swing rod, which is far away from the cloth feeding hinge shaft, is fixedly connected with the shaft body of the cloth feeding shaft; the second swing rod is hinged with the first hinge shaft; one end of the second swing rod, which is far away from the first hinge shaft, is hinged with the adjusting hinge shaft; the adjusting swing rod is hinged with the adjusting hinge shaft; a bearing is inserted and fixed on the fixed seat; one end of the screw rod is fixedly connected with a knob; the other end of the screw rod sequentially passes through the nut and the inner ring of the bearing and is fixedly connected with one end of the adjusting swing rod, which is far away from the adjusting hinge shaft; the screw rod is in threaded connection with the nut; the screw is fixedly connected with the inner ring of the bearing; the fixing seat is provided with a guide hole; the outer side wall of the nut is fixedly provided with a guide post; the guide post is inserted into the guide hole. The main shaft drives the cam shaft to rotate, and then the cam shaft is transmitted to the cloth feeding swing rod through the first swing rod and the connecting swing rod, so that the cloth feeding swing rod swings back and forth to feed cloth; when an operator adjusts, the operator only needs to rotate the knob, and the adjusting swing rod fixed on the screw rod rotates; the second swing rod is driven to swing, the position of the first hinge shaft is changed, and after the position of the first hinge shaft is changed, the swing angle of the cloth feeding swing rod is changed, so that the needle pitch is changed, and the whole process is operated by one hand.

The existing overedger structure is basically consistent with the scheme, and the adjustment needs to be performed on a stitch length adjusting mechanism corresponding to the structure. Firstly, a bedplate fixed by a screw is opened, then a manual operation of rotating a knob by a sewing operator is needed, meanwhile, the main shaft hand wheel is needed to be rotated by the sewing operator, the knob is cooperated to be in place to realize needle distance adjustment, the operation means is more complicated, the degree of automation is lower, in addition, the needle distance adjusting mechanism comprises a plurality of parts with more complicated structures, and the processing cost is high.

Disclosure of Invention

Aiming at the defects of the overedger in adjusting the needle pitch, the needle pitch adjusting mechanism of the overedger is particularly provided, and is characterized by comprising a driving motor, a slide bar driving crank, a driving slide bar, an elastic piece, a needle pitch adjusting crank, a needle pitch adjusting connecting shaft and a positioning crank, wherein the slide bar driving crank is fixed on an output shaft of the driving motor, the slide bar driving crank abuts against the driving slide bar, the other end of the driving slide bar is hinged with the needle pitch adjusting crank, the needle pitch adjusting crank is connected with a fixed needle pitch adjusting connecting shaft, the elastic piece is arranged between the needle pitch adjusting crank and the needle pitch adjusting connecting shaft, the needle pitch adjusting connecting shaft is connected with the fixed positioning crank, a clamping block is arranged at the tail end of the positioning crank, and the clamping block of the positioning crank is indirectly enabled to fall into a clamping groove of the needle pitch adjusting gear by driving of the driving motor.

Preferably, the driving slide bar is arranged on a screw in a penetrating way, and the screw is fixed on the machine body.

Preferably, the elastic member is a spring.

Preferably, the clamping block falls into the clamping groove when the needle pitch adjusting gear rotates.

Preferably, the slide bar driving crank is positioned at the side edge of the overedger.

Preferably, the driving motor starts to reset, namely retreats by a certain angle, so that the clamping block of the positioning crank is separated from the clamping groove of the needle pitch adjusting gear under the action of the torsion spring.

Compared with the prior art, the application has the beneficial effects that: the sewing machine comprises a driving motor, a driving crank, a driving slide rod, a needle distance adjusting crank, a needle distance adjusting connecting shaft, a positioning crank, a clamping block and a sewing operator, wherein the driving crank is fixed on an output shaft of the driving motor, the slide rod is abutted to the driving slide rod, the needle distance adjusting crank is hinged to the other end of the driving slide rod, the needle distance adjusting connecting shaft is fixedly connected with the needle distance adjusting connecting shaft, the needle distance adjusting connecting shaft is fixedly connected with the positioning crank, the clamping block is arranged at the tail end of the positioning crank, and the driving motor is used for driving the clamping block of the positioning crank to fall into a clamping groove of the needle distance adjusting gear indirectly.

Drawings

FIG. 1 is a schematic view of the position of an overedger in which a stitch length adjustment mechanism of the overedger of the present application is located;

Fig. 2 is an assembly schematic diagram of a stitch length adjusting crank, a stitch length adjusting connecting shaft and a positioning crank of a stitch length adjusting mechanism of an overedger according to the present application.

The reference numerals for the components in the above figures are as follows:

a drive motor 10, an output shaft 11;

A slide bar driving crank 21, a driving slide bar 22, an elastic piece 23, a needle pitch adjusting crank 24, a needle pitch adjusting connecting shaft 25, a positioning crank 26 and a clamping block 261;

Needle pitch adjusting gear 31, clamping groove 311, screw 41.

Detailed Description

The preferred embodiments of the present application will now be described in detail with reference to fig. 1-2 so that the advantages and features of the present application will be more readily understood by those skilled in the art, and thus the scope of the present application is more clearly defined by the following description, which is given by way of illustration only and not limitation of the present application.

Referring to the above drawings, a stitch length adjusting mechanism of an overedger comprises a driving motor 10, a slide bar driving crank 21, a driving slide bar 22, an elastic member 23, a stitch length adjusting crank 24, a stitch length adjusting connecting shaft 25, a positioning crank 26 and the like. Under the control of the control system, when the needle pitch is required to be adjusted, the control system drives the driving motor 10, and the clamping block 261 of the stationary positioning crank 26 enters the clamping groove 311 of the needle pitch adjusting gear 31 through the transmission thrust of the components, so that a sewing operator does not need to press a needle pitch adjusting button, the needle pitch can be directly adjusted on the needle pitch adjusting wheel or the operation panel, the convenience of operation is improved, and the labor intensity of the sewing operator is reduced.

The output shaft 11 of the driving motor 10 is fixedly provided with a slide bar driving crank 21, the slide bar driving crank 21 abuts against the driving slide bar 22, the driving slide bar 22 is sleeved on a screw 41, the screw 41 is fixed on the machine body, the other end of the driving slide bar 22 is hinged to a needle pitch adjusting crank 24, the needle pitch adjusting crank 24 is connected with a fixed needle pitch adjusting connecting shaft 25, an elastic piece 23 is arranged between the needle pitch adjusting crank 24 and the needle pitch adjusting connecting shaft 25, the needle pitch adjusting connecting shaft 25 is connected with a fixed connection positioning crank 26, and the tail end of the positioning crank 26 is provided with a clamping block 261. The elastic member 23 may be a torsion spring.

The driving motor 10 drives a certain angle, so that the slide bar driving crank 21, the driving slide bar 22, the needle pitch adjusting crank 24, the needle pitch adjusting connecting shaft 25 and the positioning crank 26 are sequentially displaced by a certain distance, and finally, the slide bar driving crank 21 indirectly enables a clamping block 261 of the positioning crank 26 to fall into a clamping groove 311 of the needle pitch adjusting gear 31, and the clamping block 261 falls into the clamping groove 311 when the needle pitch adjusting gear 31 rotates. The needle distance adjusting mechanism of the overedger is operated by the driving motor 10, so that a sewing operator can conveniently and rapidly adjust the needle distance, the automation level of the overedger is improved, and meanwhile, the overedger has the advantages of simple structure of parts, more general parts and low manufacturing difficulty.

After the stitch length is adjusted, the driving motor 10 starts to reset, namely, retreats by a certain angle, and the clamping block 261 of the positioning crank 26 is indirectly separated from the clamping groove 311 of the stitch length adjusting gear 31 under the action of the torsion spring through the transmission of the components, so that the whole stitch length adjustment is completed.

The output shaft 11 of the drive motor 10 described above is provided long so that the slide bar drive crank 21 is located at the side of the overedger.

The foregoing is only one of the preferred embodiments of the present application, and is not intended to limit the scope of the application, i.e. the equivalent structure or equivalent flow transformation of the shape, structure and principle of the present application and the contents of the drawings, or the application of the application directly or indirectly to other related technical fields; any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are covered by the scope of the patent protection.

Claims (6)

1. The utility model provides a needle pitch adjustment mechanism of overedger, a serial communication port, driving motor has, slide bar drive crank, the drive slide bar, the elastic component, needle pitch adjustment crank, needle pitch adjustment connecting axle and location crank, be fixed with slide bar drive crank on the output shaft that driving motor had, slide bar drive crank supports and leans on the drive slide bar, the other end of drive slide bar articulates needle pitch adjustment crank, needle pitch adjustment crank connects fixed needle pitch adjustment connecting axle, be provided with the elastic component between needle pitch adjustment crank and the needle pitch adjustment connecting axle, needle pitch adjustment connecting axle connects fixed location crank, location crank's end is provided with the fixture block, driving motor drive indirectly makes location crank's fixture block fall into needle pitch adjustment gear's draw-in groove.

2. The needle pitch adjusting mechanism of overedger according to claim 1, characterized in that said driving slide bar is inserted on a screw fixed on the machine body.

3. The stitch length adjustment mechanism of an overedger as recited in claim 1, wherein the resilient member is a spring.

4. The stitch length adjustment mechanism of an overedger as recited in claim 1, wherein the latch falls into the catch when the stitch length adjustment gear rotates.

5. The needle pitch adjustment mechanism of an overedger as recited in claim 1, wherein the slide bar drive crank is located on a side of the overedger.

6. The needle pitch adjusting mechanism of an overedger according to claim 1, characterized in that the driving motor starts to reset, i.e. retreats by a certain angle, so that a clamping block of the positioning crank is separated from a clamping groove of the needle pitch adjusting gear under the action of the torsion spring.