CN113668153A - Sewing machine head with needle bar rotation function - Google Patents

Abstract

The utility model belongs to the technical field of the technique of sewing machine and specifically relates to a sewing machine aircraft nose that possesses needle bar rotation is related to, and it includes the casing, the one end of casing is uncovered setting, chassis bottom is provided with the bottom, the bottom runs through and is provided with the perforation, the bottom is based on the perforation is provided with the axle sleeve, it has the needle bar to go up and down in the casing, the bottom of needle bar runs through the axle sleeve, and with axle sleeve sliding connection, be provided with in the casing and be used for driving the reciprocating lifting mechanism who goes up and down of needle bar, the casing is provided with and is used for driving the rotatory slewing mechanism of needle bar. This application has the effect that improves the quality of cloth sewing.

Description

Sewing machine head with needle bar rotation function

Technical Field

The application relates to the technical field of sewing machines, in particular to a sewing machine head with a needle bar rotating function.

Background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient. And derives the artistic forms of hand-push embroidery, computer embroidery, etc.

Present sewing machine includes the casing, and the one end of casing is uncovered setting, and the bottom that the casing is close to uncovered end is provided with the bottom, and it has the needle bar to go up and down in the casing, and the needle bar is vertical setting, and the bottom is run through to the bottom of needle bar to outside extending to the bottom of bottom, be provided with in the casing and be used for driving the reciprocating elevating system who goes up and down of needle bar. When the sewing machine works, a worker firstly penetrates the textile thread through the needle rod, then the cloth to be processed is placed below the bottom cover, and under the action of the lifting mechanism, the needle rod is lifted up and down in a reciprocating mode at the moment, and the cloth to be processed is sewn.

In view of the above-mentioned related technologies, the inventor believes that in the sewing process, because the stitch direction is often changeable when sewing, if the needle rod which is lifted and lowered back and forth does not rotate along with the change of the stitch direction, the sewing thread on the processed cloth is often easy to break, skip, take up untight, and the stitch is not smooth, which results in poor quality of cloth sewing.

Disclosure of Invention

In order to improve the quality of cloth sewing, this application provides one kind and possesses rotatory sewing machine aircraft nose of needle bar.

The application provides a sewing machine aircraft nose that possesses needle bar rotation adopts following technical scheme:

the utility model provides a possesses rotatory sewing machine aircraft nose of needle bar, includes the casing, the one end of casing is uncovered setting, chassis bottom is provided with the bottom, the bottom runs through and is provided with the perforation, the bottom is based on the perforation is provided with the axle sleeve, it has the needle bar to go up and down in the casing, the bottom of needle bar runs through the axle sleeve, and with axle sleeve sliding connection, be provided with in the casing and be used for driving the reciprocating lifting mechanism who goes up and down of needle bar, the casing is provided with and is used for driving the rotatory slewing mechanism of needle bar.

Through adopting above-mentioned technical scheme, when the sewing machine starts, elevating system drives the reciprocal lift of needle bar, and when the stitch seam direction of making up changes, under slewing mechanism's effect, drives the needle bar and rotates when not influencing the reciprocal lift of needle bar to keep the needle bar threading direction unanimous with the stitch seam direction of making up, and then be favorable to improving the quality of cloth sewing.

Optionally, slewing mechanism includes the synchronizing wheel, the lateral wall cover of axle sleeve is equipped with first bearing, the synchronizing wheel cover is located the axle sleeve, just the synchronizing wheel passes through first bearing with the axle sleeve rotates the connection, the top of synchronizing wheel is provided with the bearing frame, the bearing frame is run through at the top of bearing frame, the top of bearing frame is run through and is provided with the centre gripping space, the needle bar runs through the centre gripping space, and with centre gripping space sliding connection, the bearing frame is provided with and is used for the centre gripping subassembly of needle bar, the casing is provided with and is used for driving synchronizing wheel pivoted rotating assembly.

Through adopting above-mentioned technical scheme, when needs drive the needle bar rotatory along with the stitch direction, arrange the needle bar in the centre gripping space earlier, then the rethread centre gripping subassembly carries out the centre gripping to the needle bar, then rethread rotating assembly drives the synchronizing wheel and rotates, and the synchronizing wheel drives the bearing housing and rotates, and the bearing housing then drives the needle bar rotation through the centre gripping subassembly, and then is favorable to improving the rotatory stability of needle bar.

Optionally, the clamping assembly comprises at least two clamping wheels, at least two rotating grooves are correspondingly formed in the top of the bearing seat, the rotating grooves are communicated with the clamping space respectively, the at least two clamping wheels rotate in the at least two rotating grooves respectively, at least two abutting surfaces are correspondingly arranged on the side wall of the needle rod, and the at least two clamping wheels abut against the at least two abutting surfaces respectively.

Through adopting above-mentioned technical scheme, the centre gripping wheel butt is in the butt face of needle bar, and when synchronizing wheel drove the bearing frame and rotates, the bearing frame drove the centre gripping wheel and rotates, and the centre gripping wheel passes through the butt face and drives the needle bar rotation, and when the reciprocal lift of needle bar, the needle bar drove the centre gripping wheel at the rotation inslot rotation simultaneously, and then is favorable to improving needle bar lift and pivoted stability.

Optionally, the bearing frame includes first sub-seat and second sub-seat, first sub-seat and the second sub-seat set up respectively in the top of synchronizing wheel, first sub-seat with the second sub-seat encloses to close and forms the centre gripping space, at least two the centre gripping wheel rotate respectively in first sub-seat and in the second sub-seat, one side of first sub-seat is provided with the inserted block, the slot has been seted up to one side correspondence of second sub-seat, the inserted block with the slot is pegged graft, first sub-seat and the second sub-seat respectively through the bolt with the synchronizing wheel is connected.

Through adopting above-mentioned technical scheme, when needs installation bearing frame, earlier first sub-seat and second sub-seat remove towards the direction that is close to each other, first sub-seat drives and the second sub-seat drives two at least centre gripping wheels simultaneously and removes towards the direction that is close to each other, at last the bolt of screwing up respectively, two at least centre gripping wheels carry out the centre gripping to the needle bar through the butt face simultaneously this moment, are favorable to improving the convenience of bearing frame installation, are favorable to improving the suitability of the needle bar of the different diameters of bearing frame centre gripping.

Optionally, the rotating assembly includes a stepping motor, a transmission wheel and a synchronous belt, a fixing seat is arranged on one side of the bottom cover, the stepping motor is arranged on the fixing seat, the transmission wheel is sleeved on an output shaft of the stepping motor, and the transmission wheel is in transmission connection with the synchronous wheel through the synchronous belt.

Through adopting above-mentioned technical scheme, when starting step motor, step motor's output shaft drive wheel rotates, and the drive wheel passes through the hold-in range and drives the synchronizing wheel and rotate, and the synchronizing wheel drives the bearing frame and rotates, and the bearing frame drives the needle bar through two at least centre gripping wheels and rotates, and then is favorable to improving needle bar pivoted stability.

Optionally, elevating system includes the eccentric wheel and is used for driving eccentric wheel pivoted drive assembly, the eccentric wheel rotate in the casing, one side of eccentric wheel eccentric rotation is provided with take-up component and connecting rod respectively, one side of eccentric wheel eccentric is provided with the connecting rod eccentrically, the one end of connecting rod with the eccentric wheel rotates to be connected, the other end of connecting rod rotates and is provided with the connecting seat, one side of connecting seat is provided with the connecting block, the top cover of needle bar is equipped with the second bearing, the needle bar passes through the second bearing with the connecting block rotates to be connected, the connecting block will the needle bar is spacing in the below of take-up component, the casing is provided with and is used for the cooperation the guide that the connecting block goes up and down.

By adopting the technical scheme, when the needle rod is required to be driven to reciprocate up and down, the eccentric wheel is driven to rotate through the driving assembly, on the one hand, under the action of the guide piece, the eccentric wheel finally drives the connecting block to reciprocate up and down through the eccentrically arranged connecting rod, the connecting block drives the needle rod to reciprocate up and down through the second bearing, and when the needle rod rotates, the needle rod is simultaneously and rotatably connected with the connecting block through the second bearing, so that the stability of the reciprocating up and down and the rotation of the needle rod is improved, on the other hand, according to the traditional flat sewing machine, the thread picking component does not need to be lifted up relative to a machine needle at the bottom of the needle rod, and when the needle rod rotates, the synchronization of the thread picking component and the lifting of the needle rod is not required to be adjusted, on the other hand, under the action of the connecting block, the needle rod is arranged below the thread picking component, and at the moment, the thread quantity from the thread picking component to the machine needle thread through hole at the bottom of the needle rod is close to the standard thread through the flat sewing machine, so that no wrinkle, no thread cast, standard stitch and beautiful appearance are realized during sewing.

Optionally, one side of connecting rod is provided with the linoleum box, the top of linoleum box is uncovered setting, the inlet port has been seted up to bottom one side of connecting rod, the linoleum box is provided with and is used for percolating the piece of worrying about with oil infiltration in the inlet port, the lateral wall of connecting rod is provided with the oil line clamp plate.

Through adopting above-mentioned technical scheme, when the life is longer back, the hookup location department of connecting rod and connecting seat produces abnormal sound or wearing and tearing because of the friction easily, when the abnormal sound is eliminated to needs, in adding the linoleum box with appropriate amount of oil earlier, in the oil inlet was infiltrated through oozing the piece to the oil in the linoleum box this moment, under the lubricated effect of oil, was favorable to improving connecting rod and connecting seat pivoted smoothness nature each other.

Optionally, a supporting seat is arranged on one side of the top of the bottom cover, an oil-absorbing felt is arranged on the top of the bearing seat, the needle rod penetrates through the oil-absorbing felt and is rotatably connected with the oil-absorbing felt, and a cover plate used for covering the oil-absorbing felt is arranged on the top of the supporting seat.

Through adopting above-mentioned technical scheme, when the oil infiltration reached the oil absorption felt on, the oil on the oil absorption felt was infiltrated bearing frame and axle sleeve along the needle bar, and under the lubricated effect of oil, centre gripping wheel and needle bar relative slip, needle bar and axle sleeve relative slip are favorable to improving the smooth and easy nature that the needle bar goes up and down in the centre gripping space.

Optionally, a protective cover is arranged at the top of the bottom cover, the protective cover covers the bearing seat and the synchronizing wheel, and the oil-absorbing felt is arranged at the top of the protective cover.

Through adopting above-mentioned technical scheme, the oil on the oil absorption felt permeates the bearing frame through the visor on to reach lubricated purpose, simultaneously at the in-process that the needle bar was made up, the sewing thread is favorable to reducing the thread bits and piles up on the bearing frame because high-speed operation leads to some thread bits to drop in the casing, under the protective cover effect, thereby improves the bearing frame and drives the stability that the needle bar is rotatory and the cooperation drives the reciprocal lift of needle bar.

Optionally, an air blowing pipe is arranged in the casing, an air blowing hole is formed in the side wall of the air blowing pipe, and an air blowing part is communicated with one end of the air blowing pipe.

Through adopting above-mentioned technical scheme, when the thread scraps in the needs clearance casing, the accessible blows the piece and blows to the gas blow pipe, and gas blows off from the hole of blowing again, and gas blows off the thread scraps outside the casing this moment, and then is favorable to preventing that the thread scraps from influencing the needle bar motion.

To sum up, this application includes beneficial technological effect:

when the sewing machine starts, the lifting mechanism drives the needle bar to reciprocate, and when the direction of the sewn stitch changes, the needle bar is driven to rotate under the action of the rotating mechanism without influencing the reciprocating lifting of the needle bar so as to keep the threading direction of the needle bar consistent with the direction of the sewn stitch, thereby being beneficial to improving the quality of cloth sewing.

Drawings

Fig. 1 is a schematic view of the overall structure of a sewing machine head with needle bar rotation according to the present application.

Fig. 2 is a schematic view of the overall structure of the lifting mechanism and the rotating mechanism of the present application.

Fig. 3 is a schematic view showing the connection relationship of the needle bar, the bearing block, the synchronizing wheel and the shaft sleeve.

Fig. 4 is a schematic view of the overall structure of the connecting rod of the present application.

Description of reference numerals: 1. a sewing machine body; 2. a housing; 21. a fixed cover; 22. a bottom cover; 221. perforating; 23. a shaft sleeve; 231. a first bearing; 24. a supporting seat; 25. a cover plate; 26. a cover is turned; 261. chip removal holes; 3. a needle bar; 31. an abutting surface; 32. a second bearing; 4. a synchronizing wheel; 41. a bearing seat; 411. a first sub-mount; 411a, an insert block; 412. a second sub-mount; 412b, a slot; 42. a clamping space; 43. a clamping wheel; 44. a rotating groove; 45. a bolt; 5. a fixed seat; 51. a stepping motor; 52. a driving wheel; 53. a synchronous belt; 6. an eccentric wheel; 61. a connecting rod; 611. an oil inlet hole; 612. pressing plate of oil line; 62. a connecting seat; 63. connecting blocks; 64. a thread take-up member; 7. a drive motor; 71. a driving wheel; 72. a driven wheel; 73. a drive belt; 74. a drive shaft; 75. a guide slider; 76. a guide rail; 77. a linoleum box; 8. a protective cover; 81. an oil-absorbing felt; 9. an air blowing pipe; 91. a gas blowing hole; 92. and (4) a nozzle.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

Example (b):

referring to fig. 1 and 2, a head of a sewing machine with a needle bar rotating includes a housing 2, and the housing 2 is fixed to one end of a sewing machine body 1. One side of the cabinet 2 is an open end, and a fixing cover 21 is fixed to the open end of the cabinet 2. A bottom cover 22 is fixed at the bottom of the casing 2, and the bottom cover 22 is welded with the casing 2 into a whole. A through hole 221 is formed through the top of the bottom cover 22, and the through hole 221 is opened along the vertical direction of the bottom cover 22. The bottom cover 22 is provided with a bushing 23, and the bushing 23 is fixed in the through hole 221. Be provided with needle bar 3 in the casing 2, needle bar 3 is vertical setting, and needle bar 3 is used for treating the processing cloth and sews, and axle sleeve 23 is run through to the bottom of needle bar 3 to outside extending to the bottom of casing 2, and needle bar 3 and axle sleeve 23 relative sliding connection. A lifting mechanism for driving the needle rod 3 to reciprocate is arranged in the machine shell 2, and the machine shell 2 is provided with a rotating mechanism for driving the needle rod 3 to rotate at the same time.

Specifically, referring to fig. 2 and 3, the rotating mechanism includes a synchronizing wheel 4 and a rotating assembly for rotating the synchronizing wheel 4. The fixed cover in top of axle sleeve 23 is equipped with first bearing 231, and synchronizing wheel 4 is the level setting, and outside the lateral wall of axle sleeve 23 was located to synchronizing wheel 4 cover, and synchronizing wheel 4 rotated with axle sleeve 23 through first bearing 231 and is connected. Bearing frame 41 can be dismantled at the top of synchronizing wheel 4, and bearing frame 41 is cylindricly, and the top of bearing frame 41 runs through there is centre gripping space 42, and centre gripping space 42 is seted up along the vertical square of bearing frame 41, and needle bar 3 is reciprocal to be gone up and down in centre gripping space 42. The bearing housing 41 is provided with a clamping assembly for clamping the needle bar 3.

When the needle rod 3 needs to be driven to rotate, the needle rod 3 is clamped in the clamping space 42 through the clamping assembly, then the synchronizing wheel 4 is driven to rotate through the rotating assembly, the synchronizing wheel 4 drives the bearing seat 41 to rotate, and the bearing seat 41 drives the needle rod 3 to rotate through the clamping assembly.

In particular, referring to fig. 3, the clamping assembly includes a clamping wheel 43. The top of the bearing seat 41 is provided with a rotating groove 44, and the rotating groove 44 is formed along the vertical direction of the bearing seat 41. Two rotating grooves 44 are provided, and the two rotating grooves 44 are respectively communicated with the holding space 42. The number of the clamping wheels 43 is correspondingly two, the two clamping wheels 43 respectively rotate in the two rotating grooves 44, and the clamping space 42 is formed by the two clamping wheels 43 in a surrounding manner. Two opposite side walls of the needle bar 3 are provided with abutting surfaces 31, and the two clamping wheels 43 respectively abut against the two abutting surfaces 31 on the needle bar 3.

When the synchronizing wheel 4 rotates, the synchronizing wheel 4 drives the bearing seat 41 to rotate, and the bearing seat 41 simultaneously drives the two clamping wheels 43 to rotate. And because the two clamping wheels 43 are simultaneously clamped on the two abutting surfaces 31 on the needle bar 3, the two clamping wheels 43 drive the needle bar 3 to rotate.

It is worth mentioning that, with reference to fig. 3, in order to improve the ease of mounting of the bearing housing 41 and to facilitate the adaptation of the bearing housing 41 to needle bars 3 of different diameters. The bearing seat 41 includes a first sub-seat 411 and a second sub-seat 412, the first sub-seat 411 and the second sub-seat 412 are respectively in a semi-circular block shape, the first sub-seat 411 and the second sub-seat 412 are respectively disposed at the top of the synchronizing wheel 4, and the first sub-seat 411 and the second sub-seat 412 are respectively fixedly connected with the synchronizing wheel 4 through bolts 45. The first sub-base 411 and the second sub-base 412 are disposed opposite to each other, wherein one of the rotation slots 44 is disposed on a side of the first sub-base 411 facing the second sub-base 412, and the other rotation slot 44 is disposed on a side of the second sub-base 412 facing the first sub-base 411.

The first sub-base 411 is fixed with two insertion blocks 411a towards one side of the second sub-base 412, and the two insertion blocks 411a are respectively arranged symmetrically along the axis of the first sub-base 411. Two slots 412b are correspondingly formed in one side of the second sub-base 412 facing the first sub-base 411, the two slots 412b are respectively formed along the width direction of the second sub-base 412, and the two insertion blocks 411a are respectively inserted into the two slots 412 b.

When it is necessary to mount the bearing seat 41 and to accommodate needle bars 3 of different diameters, the insertion block 411a is aligned with the slot 412b, and then the insertion block 411a is inserted into the slot 412b, at this time, the two clamping wheels 43 abut against the abutting surfaces 31 on the needle bars 3. Finally, the screw 45 is tightened again, and the needle bar 3 is held in the holding space 42.

Specifically, referring to fig. 2, the rotating assembly includes a stepping motor 51, a transmission wheel 52, and a timing belt 53. One side of the bottom cover 22 is fixed with a fixed seat 5, and the stepping motor 51 is fixed on the top of the fixed seat 5. The transmission wheel 52 is horizontally arranged, and the transmission wheel 52 is fixedly sleeved on an output shaft of the stepping motor 51. The synchronous belt 53 is disposed in the casing 2, and the transmission wheel 52 is in transmission connection with the synchronous wheel 4 through the synchronous belt 53. When the stepping motor 51 is started, the output shaft of the stepping motor 51 drives the transmission wheel 52 to rotate, and the transmission wheel 52 drives the synchronous wheel 4 to rotate through the synchronous belt 53.

Specifically, referring to fig. 2, the lifting mechanism includes an eccentric wheel 6 and a driving assembly for driving the eccentric wheel 6 to rotate. The eccentric wheel 6 rotates in the machine case 2, one side of the eccentric wheel 6 is provided with a connecting rod 61 and a thread taking-up component 64, one ends of the thread taking-up component 64 and the connecting rod 61 are sequentially and eccentrically arranged on one side of the eccentric wheel 6, and one end of the connecting rod 61 is rotatably connected with the eccentric wheel 6. One side that the other end of connecting rod 61 deviates from eccentric wheel 6 is provided with connecting seat 62, and connecting seat 62 rotates with connecting rod 61 to be connected, and is provided with the guide that is used for the cooperation to drive connecting seat 62 and goes up and down in the casing 2. A connecting block 63 is fixed on one side of the connecting seat 62, a second bearing 32 is fixedly sleeved on the top end of the needle rod 3, the top end of the needle rod 3 penetrates through the connecting block 63 and extends out of the top of the connecting block 63, and the connecting block 63 is rotatably connected with the connecting block 63 through the second bearing 32. When the thread take-up member 64 is used for sewing, it plays a role of conveying, recovering the needle thread and tightening the stitch in the course of forming the stitch, and the connecting block 63 limits the needle bar 3 below the thread take-up member 64.

When the driving assembly drives the eccentric wheel 6 to rotate, under the matching action of the guide piece, the eccentric wheel 6 drives the connecting seat 62 to reciprocate through the connecting rod 61, and the connecting seat 62 drives the needle rod 3 to reciprocate through the connecting block 63. And when the shank 3 rotates, the shank 3 rotates relative to the connecting block 63 through the second bearing 32.

Specifically, referring to fig. 2, the driving assembly includes a driving shaft 74, a driven pulley 72, a driving pulley 71, a driving belt 73, and a driving motor 7. The driving motor 7 is fixed on the inner side of the top of the casing 2, the driving wheel 71 is arranged in the casing 2, and the driving wheel 71 is fixedly sleeved on the output shaft of the driving motor 7. The driven pulley rotates at the inner side of the machine shell 2, and the driving pulley 71 is in transmission connection with the driven pulley 72 through a transmission belt 73. The transmission shaft 74 is horizontally arranged, one end of the transmission shaft 74 is coaxially and fixedly connected with one side of the driven wheel 72, and the other end of the transmission shaft 74 is coaxially and fixedly connected with the eccentric wheel 6.

When the driving motor 7 is started, the output shaft of the driving motor 7 drives the driving wheel 71 to rotate, the driving wheel 71 drives the driven wheel 72 to rotate through the transmission belt 73, and the driven wheel 72 drives the eccentric wheel 6 to rotate through the connecting shaft.

Specifically, referring to fig. 2, the guide is a guide slider 75. A guide rail 76 is fixed in the machine shell 2, the guide rail 76 is vertically arranged, the guide slider 75 slides on the guide rail 76, and the connecting seat 62 is fixedly connected with one side of the guide slider 75 departing from the guide rail 76. When the eccentric wheel 6 rotates, the eccentric wheel 6 drives the connecting base 62 to reciprocate through the connecting rod 61, and the connecting base 62 drives the guide slider 75 to reciprocate along the vertical direction of the guide rail 76.

It should be noted that, referring to fig. 2 and 4, in order to improve the smoothness of the connecting rod 61 driving the connecting seat 62 to ascend and descend, a felt box 77 is fixed on one side of the connecting rod 61 away from the eccentric wheel 6, the felt box 77 is rectangular, the top of the felt box 77 is open, and the felt box 77 is used for storing lubricating oil. An oil inlet hole 611 is formed in the side wall of the connecting rod 61, the oil inlet hole 611 is communicated with the connecting position of the connecting rod 61 and the connecting seat 62, and the felt box 77 is provided with a seepage member for percolating lubricating oil into the oil inlet hole 611. In this embodiment, the oil guiding member is an oil guiding wire (not shown), the oil guiding wire is disposed at the bottom of the oil felt box 77, one end of the oil guiding wire is fixed and communicated with the bottom of the oil felt box 77, and the other end of the oil guiding wire is inserted into the oil inlet 611. An oil line pressing plate 612 is fixed on the side wall of the connecting rod 61, and the oil line pressing plate 612 presses the oil guide line.

When the worker injects the lubricant into the felt box 77 through the open end of the felt box 77, the lubricant permeates into the oil inlet hole 611 through the oil guide line, and finally the lubricant flows into the connecting position of the connecting rod 61 and the connecting seat 62.

It is worth mentioning that, referring to fig. 2, since the textile wire is easy to generate thread scraps when running at a high speed, in order to prevent the thread scraps from falling onto the bearing seat 41, the top of the bottom cover 22 is fixed with the protection cover 8, the protection cover 8 covers the bearing seat 41 and the synchronizing wheel 4, and the needle bar 3 penetrates through the protection cover 8 and is inserted into the protection cover 8.

It should be noted that, referring to fig. 2, in order to improve the smoothness of the relative sliding between the two abutting wheels and the needle bar 3, an oil-absorbing felt 81 is disposed on the top of the protective cover 8, and the needle bar 3 penetrates through the oil-absorbing felt 81 and is inserted into the oil-absorbing felt 81. The supporting seat 24 is fixed on one side of the top of the bottom cover 22, the oil absorption felt 81 is fixed on one side of the supporting seat 24, and the cover plate 25 for pressing the oil absorption felt 81 is arranged on the top of the supporting seat 24.

When the worker adheres the lubricating oil to the oil-absorbing felt 81, the lubricating oil on the oil-absorbing felt 81 seeps along the needle bar 3 to the abutment wheel, thereby improving the smoothness of the relative sliding between the abutment wheel and the needle bar 3.

Referring to fig. 2, in order to reduce thread scraps in the casing 2, a blowing assembly is disposed in the casing 2, and the blowing assembly includes a blowing pipe 9. The blowpipe 9 is horizontally arranged, and the blowpipe 9 is fixed in the casing 2 through a support seat 24. The side wall of gas blow pipe 9 has been seted up gas blow hole 91, and the quantity of gas blow hole 91 is equipped with a plurality ofly, and a plurality ofly gas blow hole 91 is interval distribution along the length direction of gas blow pipe 9 respectively, and the one end intercommunication of gas blow pipe 9 is provided with nozzle 92, and the other end intercommunication of gas blow pipe 9 is provided with the blowing piece, and in this embodiment, the blowing piece is a blowing pump (not shown in the figure). When the blowing pump is started, the blowing pump blows air into the blowing pipe 9, and then the air is respectively sprayed out from the blowing holes 91 and the nozzles 92, and at this time, the air blows thread scraps out of the housing 2.

Referring to fig. 1, in order to facilitate the thread scraps to be blown out of the housing 2, one side of the housing 2 is hinged to a flip cover 26, a plurality of scrap discharge holes 261 are formed in the flip cover 26, and the scrap discharge holes 261 are respectively distributed in a rectangular array along the length direction of the flip cover 26. When the gas is respectively ejected from the blowing holes 91 and the nozzles 92, the lint is respectively blown out of the housing 2 through the plurality of chip removal holes 261.

A working principle of a sewing machine head with a needle bar rotating function is as follows:

when the sewing machine is started, the output shaft of the driving motor 7 drives the driving wheel 71 to rotate at the moment, the driving wheel 71 drives the driven wheel 72 to rotate through the transmission belt 73, the driven wheel 72 drives the eccentric wheel 6 to rotate through the transmission shaft 74, under the action of the guide sliding block 75, the eccentric wheel 6 drives the connecting seat 62 to reciprocate through the connecting rod 61, the connecting seat 62 drives the needle rod 3 to reciprocate through the connecting block 63, and at the moment, the needle rod 3 ascends and descends in the clamping space 42.

When the needle bar 3 rises, in order to meet the requirement that the needle bar 3 changes along with the change of the stitch direction, the stepping motor 51 is started at the moment, the output shaft of the stepping motor 51 drives the transmission wheel 52 to rotate, the transmission wheel 52 drives the synchronizing wheel 4 to rotate through the synchronous belt 53, the synchronizing wheel 4 drives the bearing seat 41 to rotate, the bearing seat 41 drives the needle bar 3 to rotate through the two clamping wheels 43, and at the moment, the needle bar 3 rotates in the shaft sleeve 23 and is consistent with the stitch direction.

In conclusion, the needle bar 3 is changed along with the change of the stitch direction, thereby being beneficial to improving the quality of cloth sewing.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A sewing machine head with a needle bar rotating, characterized in that: including casing (2), the one end of casing (2) is uncovered setting, casing (2) bottom is provided with bottom (22), bottom (22) run through and are provided with perforation (221), bottom (22) are based on perforation (221) are provided with axle sleeve (23), it has needle bar (3) to go up and down in casing (2), the bottom of needle bar (3) runs through axle sleeve (23), and with axle sleeve (23) sliding connection, be provided with in casing (2) and be used for driving the elevating system that needle bar (3) reciprocated, casing (2) are provided with and are used for driving the rotatory slewing mechanism of needle bar (3).

2. A head of a sewing machine with a needle bar rotating as claimed in claim 1, wherein: slewing mechanism includes synchronizing wheel (4), the lateral wall cover of axle sleeve (23) is equipped with first bearing (231), synchronizing wheel (4) cover is located axle sleeve (23), just synchronizing wheel (4) pass through first bearing (231) with axle sleeve (23) rotate to be connected, the top of synchronizing wheel (4) is provided with bearing frame (41), bearing frame (41) are run through at the top of bearing frame (41), the top of bearing frame (41) is run through and is provided with centre gripping space (42), needle bar (3) run through centre gripping space (42), and with centre gripping space (42) sliding connection, bearing frame (41) are provided with and are used for the centre gripping subassembly of needle bar (3), casing (2) are provided with and are used for driving synchronizing wheel (4) pivoted rotating assembly.

3. A sewing machine head with needle bar rotation as claimed in claim 2, wherein: the centre gripping subassembly includes two at least centre gripping wheels (43), the top of bearing frame (41) is corresponding has seted up two at least rotation grooves (44), two at least rotation groove (44) respectively with centre gripping space (42) are linked together, two at least centre gripping wheel (43) rotate respectively in two at least in rotation groove (44), the lateral wall of needle bar (3) corresponds and is provided with two at least butt faces (31), two at least centre gripping wheel (43) butt respectively in two at least butt face (31).

4. A head of a sewing machine with a needle bar rotating as claimed in claim 3, wherein: the bearing seat (41) comprises a first sub-seat (411) and a second sub-seat (412), the first sub-seat (411) and the second sub-seat (412) are arranged at the top of the synchronizing wheel (4) respectively, the first sub-seat (411) and the second sub-seat (412) are enclosed to form the clamping space (42), at least two clamping wheels (43) rotate in the first sub-seat (411) and the second sub-seat (412) respectively, an inserting block (411a) is arranged on one side of the first sub-seat (411), an inserting groove (412b) is correspondingly formed in one side of the second sub-seat (412), the inserting block (411a) is connected with the inserting groove (412b) in an inserting mode, and the first sub-seat (411) and the second sub-seat (412) are connected with the synchronizing wheel (4) through bolts (45) respectively.

5. A sewing machine head with needle bar rotation as claimed in claim 2, wherein: the rotating assembly comprises a stepping motor (51), a transmission wheel (52) and a synchronous belt (53), a fixing seat (5) is arranged on one side of the bottom cover (22), the stepping motor (51) is arranged on the fixing seat (5), the transmission wheel (52) is sleeved on an output shaft of the stepping motor (51), and the transmission wheel (52) is in transmission connection with the synchronous wheel (4) through the synchronous belt (53).

6. A head of a sewing machine with a needle bar rotating as claimed in claim 1, wherein: the lifting mechanism comprises an eccentric wheel (6) and a driving component for driving the eccentric wheel (6) to rotate, the eccentric wheel (6) rotates in the machine shell (2), one side of the eccentric wheel (6) is respectively provided with a thread take-up component (64) and a connecting rod (61) in an eccentric rotation way, one end of the connecting rod (61) is rotatably connected with the eccentric wheel (6), the other end of the connecting rod (61) is rotatably provided with a connecting seat (62), a connecting block (63) is arranged at one side of the connecting seat (62), a second bearing (32) is sleeved at the top end of the needle rod (3), the needle rod (3) is rotationally connected with the connecting block (63) through the second bearing (32), the connecting block (63) limits the needle bar (3) below the thread take-up component (64), the machine shell (2) is provided with a guide piece used for being matched with the connecting block (63) to lift.

7. A head of a sewing machine with a needle bar rotating as claimed in claim 6, wherein: one side of connecting rod (61) is provided with linoleum box (77), the top of linoleum box (77) is uncovered setting, inlet port (611) have been seted up to bottom one side of connecting rod (61), linoleum box (77) are provided with and are used for percolating the piece of worrying in inlet port (611) with oil, the lateral wall of connecting rod (61) is provided with oil line clamp plate (612).

8. A sewing machine head with needle bar rotation as claimed in claim 2, wherein: the top one side of bottom (22) is provided with supporting seat (24), the top of bearing frame (41) is provided with oil absorption felt (81), needle bar (3) run through oil absorption felt (81), and with oil absorption felt (81) rotate to be connected, the top of supporting seat (24) is provided with and is used for covering and establishes apron (25) of oil absorption felt (81).

9. A head of a sewing machine with a needle bar rotating as claimed in claim 8, wherein: the top of bottom (22) is provided with visor (8), visor (8) lid is located bearing frame (41) and synchronizing wheel (4), oil absorption felt (81) set up in the top of visor (8).

10. A head of a sewing machine with a needle bar rotating as claimed in claim 1, wherein: an air blowing pipe (9) is arranged in the machine shell (2), an air blowing hole (91) is formed in the side wall of the air blowing pipe (9), and an air blowing piece is communicated with one end of the air blowing pipe (9).

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