SU1656023A1 - Actuating mechanism of sewing machine needle - Google Patents

Abstract

The invention relates to the mechanisms of sewing machines, in the structures of which devices are provided for moving the material to be processed by sewing needles, and provides for the expansion of the technological capabilities of these sewing machines. The needle movement mechanism contains two interconnected planetary gears that receive movement from the main shaft of the sewing machine. These gears provide movement of the needle bar with the needle and the needletrap of the givatel and inform the movement of the leash on the needle bar frame. In addition, the mechanism includes an additional gear train, the gear wheel of which is made on the outer surface of the gear wheel of the planetary gear, and the gearone is mounted on the hinge axis and is connected with an indicator of the amount of needle movement along the stitch line. In this case, the leash has an additional eccentric finger. 2 Il. (L

Description

The invention relates to sewing engineering, in particular to the mechanisms of needle-drivers of high-speed sewing machines.

The purpose of the invention is to expand the technological capabilities of the sewing machine.

Figure 1 shows the scheme of the proposed mechanism; figure 2 - its constructive implementation.

The movement mechanism of the sewing machine contains in the support 1 the needle bar 2, the leash 3 with the clamp 4 and the cracker 5, the eccentric pin 6 in the satellite gear 7, the fixed wheel 8 with internal gearing (forming a hydrocycloid crank with a radius equal to the cradle 5 from the center of rotation of the satellite gear 7), satellite gear 9, the movable gear wheel 10c with internal and external gears for the needle displacement mechanism, crank the nitrite 11 of the gear 11 with the gear wheel 12, loads 13 and 14 to balance the translational vizhuschihs masses crank gear 15c and balanced rotating parts, the main wa 16 of the sewing machine, the gear 17 and the shaft 18 with a step offset pointer needle at the non-stop line.

The mechanism works as follows.

Work without moving the needle. From the main shaft 16, crank 15 rotates gear-satellite 7 on gear wheel 8, Cracker 5 with collar 4 and needle bar 2 performs vertical reciprocating motions like a strapless crank of a hypo-cycloid type. At the same time, the gear wheel 12 and the crank 11 rotate

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The nyptripit is put in motion.

Work with offset needles. From the zero position (operation without displacement of the needle), the pointer on the shaft 18 sets the displacement pitch. At the same time, gear 10 rotates wheel 10 and satellite 9 rotates eccentric pin 6 through gear. In leash 3, rusk 5 moves with leash 4 in direction of gear-satellite 7 radius, changing the crankshaft of the upper end needle needle 2 so that it moves along the hypocycloid (displacement of the crank inside the circumference of the gear-satellite 7) or by epicycloid (displacement of the crank outward relative to the circumference of the gear-satellite 7), carried out the movement of the needle nonstop mode. Thus, in one drive of a balanced hypocycloid type needle bar mechanism, a safe and reliable needle back and forth mechanism is implemented to form a non-stop stitch.

Claims (1)

Invention Formula The mechanism for moving the needle of a sewing machine, containing two interconnected planetary gears associated with the main shaft and needle bar, a needle motor that is kinematically associated with one of the elements of the planetary gearing, the needle bar, the leash and the deflection frame along the line of the line, characterized in that, in order to expand the technological capabilities, it additionally contains an eccentric finger of the leash and a gear transmission, one of which elements is made on the rim of the planetary gear gear and a needle movement amount indicator along the stitch line associated with the second gear element by means of a hinge axis. 1 N- 1O cr 00 " I