CN212247446U - Needle bar rotary driving mechanism - Google Patents

Abstract

The utility model relates to a sewing machine technical field, concretely relates to needle bar rotary driving mechanism. The utility model discloses a needle and the rotating shuttle that solve prior art existence can not synchronous revolution, can not solve the problem of just, anti-stitch seam, provide a needle bar rotary driving mechanism. The utility model adopts the technical proposal that the needle bar comprises a motor, a rotary needle bar, a plane pin, a bearing, a needle bar big bevel gear and a needle bar small bevel gear; the needle bar bevel gear is vertically meshed with the needle bar bevel gear, the motor is connected with the needle bar bevel gear through a coupler to provide power for the needle bar bevel gear, the cylindrical end of the needle bar bevel gear is sleeved in the bearing, two planes are symmetrically arranged on the rotary needle bar, the rotary needle bar extends into the needle bar bevel gear and is limited with the two planes on the rotary needle bar through 2 plane pins, and the rotary needle bar moves up and down along the needle bar bevel gear or rotates together with the needle bar bevel gear.

Description

Needle bar rotary driving mechanism

The technical field is as follows:

the utility model relates to a sewing machine technical field, concretely relates to needle bar rotary driving mechanism.

Background art:

the needle bar and the rotating shuttle can not synchronously rotate in the sewing process of the prior common template sewing machine, when curve sewing or backward and forward sewing is carried out, the stitch is not smooth, and the problem of forward and backward stitches can not be solved. Not only affecting the aesthetic property of sewing, but also reducing the sewing efficiency. Therefore, a synchronous rotating mechanism for the needle bar and the rotating shuttle is needed to solve the problem of the positive and negative stitches. In order to achieve synchronization of the needle and the rotating shuttle, a mechanism for driving the needle bar to rotate is required.

The utility model has the following contents:

in view of this, the utility model provides a needle bar rotary driving mechanism for solving the problem that the eedle and the rotating shuttle that prior art exists can not synchronous revolution, can not solve just, the reverse stitch seam.

In order to solve the problems in the prior art, the technical scheme of the utility model is that a needle bar rotary driving mechanism is characterized in that: comprises a motor, a rotary needle rod, a plane pin, a bearing, a needle rod big bevel gear and a needle rod small bevel gear;

the needle bar bevel gear is vertically meshed with the needle bar bevel gear, the motor is connected with the needle bar bevel gear through a coupler to provide power for the needle bar bevel gear, the cylindrical end of the needle bar bevel gear is sleeved in the bearing, two planes are symmetrically arranged on the rotary needle bar, the rotary needle bar extends into the needle bar bevel gear and is limited with the two planes on the rotary needle bar through 2 plane pins, and the rotary needle bar moves up and down along the needle bar bevel gear or rotates together with the needle bar bevel gear.

Furthermore, the top of the rotating needle rod is sleeved with an upper needle rod sleeve.

Compared with the prior art, the utility model has the advantages as follows:

1. the utility model makes the needle moving direction always along the sewing direction by the synchronous rotation of the needle bar and the rotating shuttle of the sewing machine, thus solving the stitch problem;

2. the utility model discloses a spiral bevel gear transmission, transmission speed is fast, and control accuracy is high, uses more stably.

Description of the drawings:

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic view of the assembly structure of the present invention;

FIG. 3 is a connection diagram of the present invention and the handpiece;

the marking specification comprises 1-a machine head, 2-a needle rod upper sleeve, 3-a motor, 4-a rotating needle rod, 5-a plane pin, 6-a needle rod big bevel gear, 7-a bearing, 8-a needle rod small bevel gear and 9-a coupler.

The specific implementation mode is as follows:

in order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The present embodiment provides a needle bar rotation driving mechanism, as shown in fig. 1 and 2, comprising a needle bar upper sleeve 2, a driving motor 3, a rotating needle bar 4, a plane pin 5, a bearing 7, a needle bar bevel gear 6, a needle bar bevel gear 8, and a coupling 9; the needle bar upper sleeve 2 is fixedly arranged at the top of the machine head 1, the rotary needle bar 4 penetrates through the needle bar upper sleeve 2, the lower end of the rotary needle bar 4 penetrates through the inside of a needle bar big bevel gear 6, two planes are symmetrically arranged on the rotary needle bar 4, a plane pin 5 penetrates through the inside of the needle bar big bevel gear 6 to be in contact with the two planes of the rotary needle bar 4 for limiting, the cylindrical end of the needle bar big bevel gear 6 is tightly matched with a bearing 7, a needle bar small bevel gear 8 is connected with a motor 3 through a coupler 9, the needle bar big bevel gear 6 is meshed with the needle bar small bevel gear 8, power is transmitted to the needle bar small bevel gear 8 through the motor 3, the needle bar small bevel gear 8 drives the needle bar big bevel gear 6, the rotary needle bar 4 rotates along the needle bar.

The two planes on the rotary needle rod 4 are used for limiting the linear motion or the rotary motion.

The utility model discloses the structure is installed in 1 chin department of aircraft nose through bearing 7, and motor 3 installs in 1 one side of aircraft nose, as shown in fig. 3.

The utility model has the working process that when the straight line sewing is carried out, the utility model is the same as the common template machine, the needle bar rotating motor does not work, and the needle bar only moves up and down to carry out the sewing; when the front and back stitches are changed for sewing, the system controls the driving motor and the rotating motor of the rotating shuttle frame to synchronously rotate according to the shape of the sewing pattern, thereby ensuring the stable stitches.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (2)

1. A needle bar rotary drive mechanism characterized in that: comprises a motor (3), a rotary needle rod (4), a plane pin (5), a bearing (7), a needle rod big bevel gear (6) and a needle rod small bevel gear (8);

the needle bar bevel gear (8) is vertically meshed with the needle bar bevel gear (6), the motor (3) is connected with the needle bar bevel gear (8) through a coupler (9) to provide power for the needle bar bevel gear (8), the cylindrical end of the needle bar bevel gear (6) is sleeved in a bearing (7), two planes are symmetrically arranged on the rotary needle bar (4), the rotary needle bar (4) extends into the needle bar bevel gear (6), and the rotary needle bar (4) is limited by two planes on the rotary needle bar (4) through 2 plane pins (5) so that the rotary needle bar (4) moves up and down along the needle bar bevel gear (6) or rotates together with the needle bar bevel gear (6).

2. A needle bar rotary drive mechanism as defined in claim 1, wherein: the top of the rotary needle rod (4) is sleeved with a needle rod upper sleeve (2).

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