CN202786713U - Needle bar rotating mechanism for pattern sewing machine - Google Patents

Abstract

The utility model discloses a needle bar rotating mechanism for a pattern sewing machine. The needle bar rotating mechanism comprises a needle bar sleeve which is coaxially sleeved with a needle bar, wherein the needle bar is in sleeved connection with a needle bar sleeve through a spline and a key groove which axially extend. According to the needle bar rotating mechanism, the needle bar is driven by the needle bar sleeve to rotate, and thus a sewing needle is driven to rotate and the needle stitch and the direction of sewing are adjusted; and the needle bar and the needle bar sleeve are in sleeved connection by using the spline and the key groove which axially extend, so that the needle bar can lift relative to the needle bar sleeve while rotating along with the needle bar sleeve and further the influence on the effect of sewing is avoided. Therefore, a rotating mode of a machine head with bulky volume is replaced by a rotating mode of the needle bar with small volume, and further the needle stitch is sewn along the tangential direction of the patterns, the rotating inertia is reduced, the rotating speed is increased and the power of a motor is greatly reduced; and meanwhile, the structure of a machine head is greatly simplified and the machine head of a sewing machine is miniaturized. The needle bar rotating mechanism can be widely applied to a small-size general pattern sewing machine, and thus the market competitiveness of products is improved.

Description

The shank rotating mechanism of pattern sewing machine

Technical field

The utility model relates to the Sewing machines art, refers in particular to a kind of simple and compact for structure, reasonable easily shank rotating mechanism of pattern sewing machine of use.

Background technology

Sewing machines is to use one or more sewing thread, forms one or more stitchings, the machine that makes one or more layers sewing interweave or unite by a seam at sewing.The sewing function is made the goods such as the fabric such as cotton, fiber crops, hair, artificial fibre and leather, plastics, paper, the stitching neat appearance of embroidering out, smooth firm, and sewing velocity is fast, easy to use.Electronic pattern sewing machine is the high-end machine of Sewing machines, it is the cloth-pressing device that utilizes the feed mechanism band movement machine of vertical, horizontal, thereby drive cloth motion simulation, by the device drive synchronous belt running of motor by clutch or similar effect, through the transmission device effect needle bar of sewing machine is moved up and down in the synchronous belt operation process, use again the stitching of Sewing machines to form principle, finish sewing work, reach the purpose that forms all kinds of styles at cloth.

Because the development of clothing industry, market is more and more extensive to the demand of the style on the clothes or pattern etc., the quality requirements of making is more and more higher especially, so just require to form at clothes fast the Sewing machines of style or pattern, more need thus us to accelerate improvement to electronic pattern sewing machine, to increase efficient and quality.

Existing rotary industrial pattern sewing machine in the process that stitching forms, its be moving up and down of the motion that utilizes cloth on the platform of below, top shank and whole head rotatablely move to realize making operation and direction adjustment.The existing pattern sewing machine structure of this kind, though can offer the effect of making of all kinds of styles, really have progressive, but when reality is used, but find still to have many deficiencies on himself structure and the serviceability, fail to reach result of use and the task performance of the best.Particularly, owing to carry all multi-parts such as cycloid mechanism, driving mechanism, transmission mechanism in the head, therefore the volume and weight of head is larger usually.Thus, can cause on the one hand the power of motor that drives the head rotation larger, very power consumption; The rotation of head needs complicated transmission mechanism on the other hand, and is also very large to the wearing and tearing of transmission mechanism, affects the service life of product; Moreover, dote on the weight and volume that large head has also increased the Sewing machines rotating part, also increase vibration, and taken too much space resources, be unfavorable for the miniaturization development of Sewing machines.

The utility model content

The utility model main purpose provides a kind of shank rotating mechanism of pattern sewing machine, and it rotates by adopting the mode of rotating shank to replace whole head, thereby overcomes the deficiencies in the prior art.

For achieving the above object, the utility model adopts following technical scheme:

A kind of shank rotating mechanism of pattern sewing machine includes the shank cover that is connected with the coaxial fit of shank, is connected with the keyway fit by axially extended spline between described shank and the shank cover, and shank overlaps synchronous rotation with shank.

Preferably, further include motor and transmission mechanism, this transmission mechanism includes by this motor-driven driving wheel and is set in the driven pulley that shank puts, and driving wheel drives this driven pulley rotation, and the shank cover is with this driven pulley synchronous rotary.

Preferably, the up and down two ends of described shank cover are connected on the head holder rotationally by bearing respectively.

Preferably, described spline evenly distributes and is convexly set in the shank outer surface, and the keyway correspondence is arranged with on the inner surface of shank cover.

The utility model compared with prior art has obvious advantage and beneficial effect, particularly, as shown from the above technical solution, it drives the shank rotation by the shank cover, thereby drives the suture needle rotation, make stitching and direction with adjustment, and, its utilize axially extended spline and keyway to overlap shank and shank each other fit is connected, when shank is rotated with shank cover, shank also can overlap lifting with respect to shank, and the function that does not affect its suture realizes.By this, the utility model utilizes the tiny shank rotation of volume to replace bulky head rotating mode, and the realization needle tracking is made along the tangential direction of style figure, has reduced the inertia that rotates, improved rotary speed, greatly reduce power of motor, realized the effect of environmental protection and energy saving, simultaneously, also can greatly simplify handpiece structure, make the more miniaturization of head of Sewing machines, can be applicable to small-sized common pattern sewing machine, the market competitiveness of improving product.

For more clearly setting forth architectural feature of the present utility model and effect, come the utility model is elaborated below in conjunction with accompanying drawing and specific embodiment:

Description of drawings

Fig. 1 is the assembling schematic cross-section of the embodiment of the utility model.

Fig. 2 is the sectional view of M-M position among Fig. 1.

Fig. 3 is the yarn threading mode schematic diagram of the embodiment of the utility model.

Fig. 4 is another visual angle schematic diagram of Fig. 3.

The accompanying drawing identifier declaration:

10, handpiece case 11, holder

20, shank

21, stopper slot 22, upper positioning step

23, lower positioning step 24, spline

25, axial line hole 26, line inlet port

27, line outlet 28, guide eye

30, shank rotating mechanism

31, motor 32, driving wheel

33, driven pulley 34, synchronous belt

35, shank cover 351, keyway

352, guide eye

40, shank up-down mechanism 41, drive link

411, snap ring 42, retainer ring

50, bearing

60, guide eye 70, suture needle

80, tower line 81, yarn

90, yarn tension adjusting mechanism

The specific embodiment

Please refer to Fig. 1 to shown in Figure 4, it has demonstrated the concrete structure of one of the utility model preferred embodiment, include handpiece case 10, a holder 11 is installed on the handpiece case, shank 20, shank rotating mechanism 30 and shank up-down mechanism 40 are installed in the holder 11.Other mechanism of Sewing machines all can adopt existing known technology, and therefore therefore not to repeat here.

Wherein, shank 20, these shank 20 hollows are formed with axial line hole 25, the top in this axial line hole 25 is provided with axial line inlet port 26, the top of line inlet port 26 is provided with guide eye 60, and the lower end in axial line hole 25 is provided with line outlet 27 and the guide eye 28 of lateral openings, and guide eye 28 is positioned at the below of this side direction line outlet 27, suture needle 70 also is installed on the lower end of shank 20, with shank 20 synchronous rotaries.

This shank rotating mechanism 30 is used for driving shank 20 and rotates.Shank rotating mechanism 30 includes motor 31, shank cover 35 and the transmission mechanism between them, transmission mechanism in the present embodiment includes the driving wheel 32 that is driven by motor 31 and the driven pulley 33 that is set on the shank cover 35, driving wheel 32 drives this driven pulley 33 rotations by synchronous belt 34, makes shank cover 35 with these driven pulley 33 synchronous rotaries.Shank cover 35 is coated on the shank 20, and shank cover 35 is rotatably installed on the holder 11 by two bearings 50 up and down, then be connected with keyway 351 fits by axially extended spline 24 between shank 20 and the shank cover 22, make shank 20 overlap 35 with shank and rotate synchronously, while shank 20 also can overlap 35 with respect to shank and move up and down.As shown in Figure 2, the spline 24 in the present embodiment evenly distributes and is convexly set in shank 20 outer surfaces, and keyway 351 correspondences are arranged with on the inner surface of shank cover 35.And shank cover 35 be the up/down perforation structure, and the shank in the present embodiment overlaps 35 tops and exceed shank 20 upper ends, overlaps 35 top in shank and also is provided with guide eye 352.

This shank up-down mechanism 40 arranges for this shank 20, is used for driving shank 20 and moves up and down.Shank up-down mechanism 40 includes the drive link 41 that can move up and down, and between the upper and lower apart from two retainer rings 42 that are arranged on shank 20 outer surfaces, this retainer ring 42 can adopt the open type retainer ring to hug on shank and fixedly mount, and encloses to consist of an annular spacing groove 21 between this two retainer ring 42.Fit section 411 on this drive link 41 is placed in this stopper slot 21 rotationally by bearing 50, and annular spacing groove 21 has with fit section 411 upper and lower surfaces and pushes the up and down positioning step 22,23 that cooperates.

Threading mode in conjunction with Fig. 3 and as can be known present embodiment shown in Figure 4, the yarn 81 of tower line 80 is through the yarn tension adjusting mechanism guide eye 60 that is upward through after 90s, again downwards by guide eye 352, axial line inlet port 26 by shank 20 upper ends enters axial line hole 25, then the side direction line outlet 27 from 25 lower ends, axial line hole passes, and wears at last to be connected in suture needle 70 again.

Operation principle and the course of work that present embodiment is described in detail in detail are as follows:

When making, push shank 20 by the fit section 411 of drive link 41 in the shank up-down mechanism 40 and carry out the suture action do oscilaltion; Drive driven pulley 33 rotations by motor-driven driving wheel 32 in the shank rotating mechanism 30, driven pulley 33 further drives 35 rotations of shank cover, and shank cover 35 drives shank 20 rotations, thereby drives suture needle 70 rotations, makes stitching and direction with adjustment.Because its yarn 81 passes in the axial line hole 25 by shank 20 from top to bottom and is connected in suture needle 70 again, so shank 20 is in the process of rotation, and yarn 81 the twisted wire phenomenon can not occur.

The above, it only is preferred embodiment of the present utility model, be not that technical scope of the present utility model is imposed any restrictions, so every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any trickle modification, equivalent variations and modification that above embodiment does.

Claims (4)

1. the shank rotating mechanism of a pattern sewing machine is characterized in that: include the shank cover that is connected with the coaxial fit of shank, is connected with the keyway fit by axially extended spline between described shank and the shank cover, shank overlaps synchronous rotation with shank.

2. the shank rotating mechanism of pattern sewing machine according to claim 1, it is characterized in that: further include motor and transmission mechanism, this transmission mechanism includes by this motor-driven driving wheel and is set in the driven pulley that shank puts, driving wheel drives this driven pulley rotation, and the shank cover is with this driven pulley synchronous rotary.

3. the shank rotating mechanism of pattern sewing machine according to claim 1 is characterized in that: the up and down two ends of described shank cover are connected on the head holder rotationally by bearing respectively.

4. the shank rotating mechanism of pattern sewing machine according to claim 1 is characterized in that: described spline evenly distributes and is convexly set in the shank outer surface, and the keyway correspondence is arranged with on the inner surface of shank cover.

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