CN106400324B - Needle pitch adjusting mechanism of sewing machine - Google Patents
Needle pitch adjusting mechanism of sewing machine Download PDFInfo
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- CN106400324B CN106400324B CN201610422294.6A CN201610422294A CN106400324B CN 106400324 B CN106400324 B CN 106400324B CN 201610422294 A CN201610422294 A CN 201610422294A CN 106400324 B CN106400324 B CN 106400324B
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/30—Details
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a needle pitch adjusting mechanism of a sewing machine, and belongs to the technical field of sewing machines. The needle pitch adjusting mechanism solves the problems that an existing needle pitch adjusting mechanism of a sewing machine is not stable enough and low in precision. The needle pitch adjusting mechanism of the sewing machine comprises a base, the needle pitch adjusting mechanism comprises a stepping motor, an installation plate and a transmission shaft, the installation plate is fixedly connected to the base, a first installation hole and a second installation hole are formed in the installation plate respectively, a motor shaft of the stepping motor penetrates through the first installation hole in a rotating mode, a first transmission gear is fixedly connected to the end portion, extending out of the motor shaft, the transmission shaft is connected to the second installation hole in a rotating mode, one end of the transmission shaft is fixedly connected with a swinging seat, the other end of the transmission shaft extends out of the second installation hole, a second transmission gear is fixedly connected to the extending end portion of the transmission shaft, the second transmission gear is fan-shaped, and the second transmission gear is meshed with the first transmission gear. The needle pitch adjusting mechanism of the sewing machine has higher adjustment precision of the needle pitch and lower processing cost.
Description
Technical Field
The invention belongs to the technical field of sewing machines, and relates to a needle pitch adjusting mechanism of a sewing machine.
Background
The sewing machine is a machine which uses one or more sewing threads to form one or more stitches on a sewing material to enable one or more layers of the sewing material to be interwoven or sewn, the sewing machine can be used for sewing fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewn stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient. The sewing machine needs to adjust the needle pitch in the using process, the needle pitch adjusting mode is more, such as a dial plate assembly, an electromagnet, a motor and the like, and Chinese utility model patent application (application number: 201420493668.X) discloses a sewing machine which drives a needle pitch adjusting mechanism by utilizing a stepping motor, the sewing machine comprises a machine head and a cloth feeding mechanism, the bottom of the machine head is provided with the stepping motor and a backward and forward sewing driving shaft, the backward and forward sewing driving shaft is connected with the cloth feeding mechanism, the stepping motor is provided with a driving shaft, and a speed change gear mechanism is arranged between the stepping motor and the backward and forward sewing driving shaft; the speed change gear mechanism comprises a driving gear and a driven gear which are externally meshed, the driving gear is located at the end of the driving shaft, and the driven gear is located at the end of the backward and forward sewing driving shaft. However, the distance for adjusting the needle pitch is small, the two gears in the comparison file are respectively installed on different carriers, and the position relationship between the two gears directly affects the precision of the needle pitch adjustment, so the structure needs to debug and adjust the positions of the motor and the gears for many times, the installation is troublesome, and the adjustment precision is affected after long-term use due to the fact that the installation position is not stable enough.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a needle pitch adjusting mechanism of a sewing machine, which has higher adjustment precision on the needle pitch and lower processing cost.
The purpose of the invention can be realized by the following technical scheme: the needle pitch adjusting mechanism of the sewing machine comprises a base, wherein a cloth feeding shaft is rotatably connected onto the base, a swinging seat is hinged onto the base, the front end of the cloth feeding shaft is connected with a cloth feeding tooth, and the rear end of the cloth feeding shaft is connected with the swinging seat, and the needle pitch adjusting mechanism is characterized by comprising a stepping motor, an installation plate and a transmission shaft, wherein the installation plate is fixedly connected onto the base, a first installation hole and a second installation hole are respectively formed in the installation plate, the stepping motor is fixedly connected onto the side surface of the installation plate, a motor shaft of the stepping motor rotates to penetrate through the first installation hole, a first transmission gear is fixedly connected to the end part of the motor shaft extending out, the transmission shaft is rotatably connected into the second installation hole and is parallel to the motor shaft of the stepping motor, one end of the transmission shaft is fixedly connected with the swinging seat, the other end of the transmission shaft extends out of the second installation hole, and the end part extending out of the transmission gear is fixedly connected with the second transmission gear, the second transmission gear is fan-shaped and meshed with the first transmission gear.
The mounting plate is a flat plate, a first mounting hole and a second mounting hole are processed in advance before mounting, so that the precision of the distance between the first mounting hole and the second mounting hole can be ensured, then the mounting plate is fixed on the base, the transmission shaft penetrates through the second mounting hole, the transmission shaft and the second mounting hole have higher coaxiality, a motor shaft of the stepping motor penetrates through the second mounting hole, and meanwhile, the stepping motor is directly fixed on the mounting plate and forms an integral structure with the mounting plate, so that the motor shaft and the first mounting hole have higher coaxiality, therefore, the needle pitch adjusting mechanism can accurately control the transmission ratio and the transmission stability between the first transmission gear and the second transmission gear only by ensuring the parallelism and the distance between the first mounting hole and the second mounting hole axial lead when the mounting plate is processed, so that the needle pitch adjusting precision is improved, the repeated mounting and debugging of the stepping motor and the transmission shaft are not needed, and the mounting and debugging procedures are simplified, the processing cost is reduced, furthermore, because second drive gear is processed into fan-shaped, whole weight diminishes, therefore moment of inertia when rotating is little, and the turned angle control is more accurate, and second fan-shaped drive gear makes holistic volume littleer certainly, can be reasonable arrange the drive ratio between first drive gear and the second drive gear in the limited installation space of sewing machine, and then improve the transmission precision.
In foretell sewing machine's gauge needle adjustment mechanism, the fixed orifices has been seted up on the base, fixed cover has perpendicularly on the mounting panel side, and this fixed cover sets up with two axials of mounting hole, fixed the fixed grafting in the fixed orifices of base, the transmission shaft rotates to wear to establish in the fixed cover, and transmission shaft and fixed cover transition fit. Fixed cover tight fit is fixed in the fixed orifices for the mounting panel is fixed on the base, and fixed cover is used for keeping the stability of transmission shaft simultaneously, and improves the installation accuracy of transmission shaft, makes to have higher axiality between transmission shaft and the mounting hole two.
In foretell sewing machine's gauge needle adjustment mechanism, seted up the circular shape constant head tank on the mounting panel side, this constant head tank sets up with the mounting hole is coaxial, the circular shape location boss has on step motor's the terminal surface, and this location boss sets up with the axle center with the motor shaft, the location boss is pegged graft in the constant head tank, and the periphery wall and the constant head tank cell wall transition fit of location boss. The positioning groove is used for positioning the position of the stepping motor, so that the motor shaft and the mounting hole I have higher coaxiality after the stepping motor is fixedly mounted, the motor shaft and the transmission shaft have higher parallelism finally, the distance control is more accurate, and the transmission ratio of the transmission gear I and the transmission gear II is ensured.
In the stitch length adjusting mechanism of the sewing machine, the end face of the stepping motor is attached to the side face of the mounting plate, and the stepping motor is fixedly connected with the mounting plate through screws. The fixing between the stepping motor and the mounting plate is more stable, and the coaxiality between the motor shaft and the first mounting hole is guaranteed through mutual limitation between the end face of the stepping motor and the side face of the mounting plate.
In the stitch length adjusting mechanism of the sewing machine, a weight-reducing notch is formed in the side face of the second transmission gear, and the weight-reducing notch is fan-shaped. The weight reduction notch further reduces the weight of the second transmission gear, so that the rotational inertia is reduced, and the accuracy of the rotational angle is improved.
In the stitch length adjusting mechanism of the sewing machine, the radius of the transmission gear II is 4-6 times of the radius of the transmission gear I. The first transmission gear is smaller, the second transmission gear is larger, so that the second transmission gear rotates for a smaller angle when the first transmission gear rotates for a set angle, the precision is higher, the minimum angle selected by the first transmission gear is driven to be 1.8 degrees by the stepping motor, namely, the first transmission gear rotates for a circle by 200 steps, and meanwhile, the second transmission gear of a fan-shaped structure is adopted, so that the second transmission gear reaches a larger radius under the condition that the installation space of the sewing machine is smaller, the transmission ratio is improved, the minimum distance for adjusting the needle pitch reaches 0.08mm, and the needle pitch adjusting precision is high.
In the stitch length adjusting mechanism of the sewing machine, an annular limiting convex edge is arranged on the side surface of the first transmission gear around the motor shaft, and the limiting convex edge abuts against the side surface of the mounting plate. First drive gear is the application of force part, needs great stability, consequently supports through spacing protruding edge and leans on the mounting panel side for first drive gear keeps stable, improves the regulation precision.
In foretell sewing machine's gauge needle adjustment mechanism, the gear case lid has been linked firmly on the base downside, and above-mentioned mounting panel is located the outside of base and gear case lid, indent formation mounting groove on the gear case lid downside, above-mentioned step motor's upper portion is located the mounting groove. The mounting plate is arranged on the outer sides of the base and the gear box cover, so that the mounting space of the first transmission gear and the mounting space of the second transmission gear are increased as much as possible, the transmission ratio of the first transmission gear and the second transmission gear is increased, and the needle pitch adjusting precision is improved.
In the stitch length adjusting mechanism of the sewing machine, the gear box cover is fixedly connected with a housing, the lower part of the stepping motor is positioned in the housing, one side of the housing is provided with a cover plate opposite to the side surface of the mounting plate, and the first transmission gear and the second transmission gear are positioned between the side surface of the mounting plate and the side surface of the cover plate. The housing can seal the first transmission gear and the second transmission gear, foreign matters are prevented from affecting the first transmission gear and the second transmission gear, and transmission stability is guaranteed.
In foretell sewing machine's gauge needle adjustment mechanism, the swing seat is the U-shaped, and the tip of above-mentioned transmission shaft links firmly with the side of swing seat mutually, it has swing plate all to articulate on the both ends inner wall of swing seat, the last gauge needle crank that has linked firmly of work feed shaft, swing plate and gauge needle crank are articulated mutually. The stepping motor drives the transmission shaft to rotate through the matching of the gear, the transmission shaft drives the swing seat to swing, and then the cloth feeding shaft is enabled to rotate through the swing plate and the needle pitch crank, so that the needle pitch adjustment is realized.
Compared with the prior art, the needle pitch adjusting mechanism of the sewing machine has the following advantages:
1. the first mounting hole and the second mounting hole are formed in the same mounting plate, so that the precision of the distance between the first mounting hole and the second mounting hole can be guaranteed, the transmission shaft penetrates through the second mounting hole, the transmission shaft and the second mounting hole have higher coaxiality, the motor shaft of the stepping motor penetrates through the second mounting hole, the motor shaft and the first mounting hole have higher coaxiality, and therefore the needle pitch adjusting mechanism can accurately control the transmission ratio and the transmission stability between the first transmission gear and the second transmission gear only by guaranteeing the parallelism and the distance between the first mounting hole and the second mounting hole axis when the mounting plate is machined, and the needle pitch adjusting precision is improved.
2. Because the two pairs of transmission shafts of the mounting holes are positioned and the two pairs of motor shafts of the mounting holes are positioned, repeated installation and debugging of the stepping motor and the transmission shafts are not needed, the installation and debugging procedures are simplified, and the processing cost is reduced.
3. Because the second transmission gear is processed into a fan shape, the whole weight is reduced, the rotational inertia during rotation is small, the control of the rotation angle is more accurate, meanwhile, the second fan-shaped transmission gear enables the whole size to be smaller, the transmission ratio between the first transmission gear and the second transmission gear can be reasonably arranged in the limited installation space of the sewing machine, and the transmission precision is further improved.
Drawings
Fig. 1 is a perspective view of a pitch adjustment mechanism.
Fig. 2 is a structural sectional view of the pitch adjustment mechanism.
Fig. 3 is an enlarged view of the structure at a in fig. 2.
Fig. 4 is an enlarged view of the structure at B in fig. 1.
Fig. 5 is a perspective view of the mounting plate.
Fig. 6 is a schematic perspective view of the stepping motor.
Fig. 7 is a partial perspective view of the sewing machine.
FIG. 8 is a partial structural side view of the sewing machine.
In the figure, 1, a base; 11. a cloth feeding shaft; 111. a gauge crank; 12. a swing seat; 121. a swing plate; 13. a feed dog; 14. a fixing hole; 2. a stepping motor; 21. a motor shaft; 22. positioning the boss; 3. mounting a plate; 31. a first mounting hole; 32. a second mounting hole; 33. fixing a sleeve; 34. positioning a groove; 4. a drive shaft; 5. a first transmission gear; 51. a limiting convex edge; 6. a second transmission gear; 61. a weight-reducing notch; 7. a gearbox cover; 71. mounting grooves; 8. a housing; 81. and a cover plate.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in figures 1, 2, 3 and 4, the needle pitch adjusting mechanism of the sewing machine comprises a base 1, a cloth feeding shaft 11 is rotatably connected on the base 1, a swinging seat 12 is further hinged on the base 1, the front end of the cloth feeding shaft 11 is connected with a cloth feeding tooth 13, the rear end of the cloth feeding shaft is connected with the swinging seat 12, the needle pitch adjusting mechanism comprises a stepping motor 2, a mounting plate 3 and a transmission shaft 4, the mounting plate 3 is fixedly connected on the base 1, a first mounting hole 31 and a second mounting hole 32 are respectively arranged on the mounting plate 3, the stepping motor 2 is fixedly connected on the side surface of the mounting plate 3, a motor shaft 21 of the stepping motor 2 rotatably penetrates through the first mounting hole 31, a first transmission gear 5 is fixedly connected at the extending end part of the motor shaft 21, the transmission shaft 4 is rotatably connected in the second mounting hole 32, the transmission shaft 4 is parallel to the motor shaft 21 of the stepping motor 2, one end of the transmission shaft 4 is fixedly connected with the swinging seat 12, the other end of the needle distance adjusting mechanism extends out of a second mounting hole 32, a second transmission gear 6 is fixedly connected to the extending end portion, the second transmission gear 6 is in a fan shape, the second transmission gear 6 is meshed with a first transmission gear 5, the mounting plate 3 is a flat plate, the first mounting hole 31 and the second mounting hole 32 are machined in advance before mounting, therefore, the precision of the distance between the first mounting hole 31 and the second mounting hole 32 can be guaranteed, then the mounting plate 3 is fixed on the base 1, the transmission shaft 4 penetrates through the second mounting hole 32, the transmission shaft 4 and the second mounting hole 32 have high coaxiality, a motor shaft 21 of the stepping motor 2 penetrates through the second mounting hole 32, meanwhile, the stepping motor 2 is directly fixed on the mounting plate 3 and forms an integral structure with the mounting plate 3, the motor shaft 21 and the first mounting hole 31 have high coaxiality, and therefore, the needle distance adjusting mechanism can accurately control the first transmission gear 5 and the transmission teeth only by guaranteeing the parallelism and the distance between the axial lines of the first mounting hole 31 and the second mounting hole 32 when the mounting plate 3 is machined The transmission ratio and the transmission stability between the second wheels 6 improve the needle pitch adjusting precision, the step motor 2 and the transmission shaft 4 do not need to be repeatedly installed and debugged, the installation and debugging procedures are simplified, the processing cost is reduced, and furthermore, because the second transmission gear 6 is processed into a fan shape, the whole weight is reduced, so that the rotational inertia during rotation is small, the control of the rotational angle is more accurate, the fan-shaped second transmission gear 6 ensures that the whole volume is smaller, the transmission ratio between the first transmission gear 5 and the second transmission gear 6 can be reasonably arranged in the limited installation space of the sewing machine, and further improve the transmission precision, in the embodiment, the first transmission gear 5 and the second transmission gear 6 are both positioned at the rear end of the stepping motor 2, of course, the first transmission gear 5 and the second transmission gear 6 may also be disposed at the front end of the stepping motor 2 in the actual processing process, that is, the motor shaft 21 of the stepping motor 2 faces the front end of the base 1.
Particularly, combine fig. 5, fig. 6 shows, fixed orifices 14 have been seted up on the base 1, fixed cover 33 has perpendicularly on the mounting panel 3 side, this fixed cover 33 sets up with two 32 coaxial cores of mounting hole, fixed cover 33 is pegged graft in the fixed orifices 14 of base 1 through the tight fit is fixed, make mounting panel 3 fix on base 1, transmission shaft 4 rotates and wears to establish in fixed cover 33, and transmission shaft 4 and fixed cover 33 transition fit, be used for keeping transmission shaft 4's stability, and improve transmission shaft 4's installation accuracy, make to have higher axiality between transmission shaft 4 and two 32 of mounting hole. Seted up circular shape constant head tank 34 on the 3 sides of mounting panel, this constant head tank 34 sets up with the axle center of a mounting hole 31, circular shape location boss 22 has on step motor 2's the terminal surface, this location boss 22 sets up with the axle center of motor shaft 21, location boss 22 is pegged graft in constant head tank 34, and the periphery wall and the 34 cell wall transition fit of constant head tank of location boss 22, constant head tank 34 is used for fixing a position step motor 2's position, make step motor 2 by fixed mounting back motor shaft 21 and mounting hole 31 have higher axiality, finally make motor shaft 21 and transmission shaft 4 have higher depth of parallelism, and distance control is more accurate, guarantee drive gear one 5 and drive gear two 6 drive ratios. The terminal surface of step motor 2 pastes with the side of mounting panel 3 and leans on mutually, and step motor 2 links firmly mutually with mounting panel 3 through the screw for fixed more stable between step motor 2 and the mounting panel 3, simultaneously through 2 terminal surfaces of step motor and 3 mutual injectures between the side of mounting panel, guarantees the axiality between motor shaft 21 and the mounting hole 31.
And a weight-reducing notch 61 is formed in the side surface of the second transmission gear 6, and the weight-reducing notch 61 is in a fan shape, so that the weight of the second transmission gear 6 is further reduced, the rotational inertia is reduced, and the accuracy of the rotation angle is improved. The radius of the transmission gear II 6 is 5 times of the radius of the transmission gear I5, the transmission gear I5 is smaller, the transmission gear II 6 is larger, the rotating angle of the transmission gear II 6 is smaller when the transmission gear I5 rotates to set the angle, the precision is higher, the minimum angle selected by the transmission gear I5 is driven to be 1.8 degrees by the stepping motor 2, namely, the transmission gear I5 rotates for a circle through 200 steps, meanwhile, due to the adoption of the transmission gear II 6 with the sector structure, the transmission gear II 6 enables the transmission gear II 6 to reach a larger radius under the condition that the installation space of the sewing machine is smaller, the transmission ratio is improved, the minimum distance for adjusting the needle pitch reaches 0.08mm, and the needle pitch adjusting precision is high. The side face of the first transmission gear 5 is provided with an annular limiting convex edge 51 surrounding the motor shaft 21, the limiting convex edge 51 abuts against the side face of the mounting plate 3, the first transmission gear 5 is a force application part and needs larger stability, and therefore the first transmission gear 5 abuts against the side face of the mounting plate 3 through the limiting convex edge 51, so that the first transmission gear 5 is kept stable, and the adjusting precision is improved.
As shown in the combined drawings 7 and 8, the gear box cover 7 is fixedly connected to the lower side surface of the base 1, the mounting plate 3 is located on the outer sides of the base 1 and the gear box cover 7, the lower side surface of the gear box cover 7 is concave inwards to form a mounting groove 71, the upper portion of the stepping motor 2 is located in the mounting groove 71, the mounting plate 3 is arranged on the outer sides of the base 1 and the gear box cover 7, mounting spaces of a first transmission gear 5 and a second transmission gear 6 are increased as far as possible, the transmission ratio of the first transmission gear and the second transmission gear is increased, and the needle pitch adjusting precision is improved. The gear box cover 7 is fixedly connected with a housing 8, the lower portion of the stepping motor 2 is located in the housing 8, a cover plate 81 opposite to the side face of the mounting plate 3 is arranged on one side of the housing 8, the first transmission gear 5 and the second transmission gear 6 are located between the side face of the mounting plate 3 and the side face of the cover plate 81, the housing 8 can seal the first transmission gear 5 and the second transmission gear 6, foreign matters are prevented from affecting the first transmission gear 5 and the second transmission gear 6, and transmission stability is further guaranteed. Swing seat 12 is the U-shaped, and the tip of transmission shaft 4 links firmly with the side of swing seat 12 mutually, all articulates on the both ends inner wall of swing seat 12 has swing plate 121, has linked firmly needle pitch crank 111 on the work feed axle 11, and swing plate 121 is articulated mutually with needle pitch crank 111, and step motor 2 drives transmission shaft 4 through gear cooperation and rotates, and transmission shaft 4 drives swing seat 12 swing, and then makes work feed axle 11 rotate through swing plate 121 and needle pitch crank 111, realizes the needle pitch regulation.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms base 1, feed shaft 11, gauge crank 111, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to the spirit of the present invention.
Claims (9)
1. The utility model provides a sewing machine's gauge needle adjustment mechanism, sewing machine includes base (1), it is connected with work feed axle (11) to rotate on base (1), still articulated on base (1) have swing seat (12), the front end of work feed axle (11) links with feed dog (13), and the rear end links with swing seat (12), its characterized in that, gauge needle adjustment mechanism includes step motor (2), mounting panel (3) and transmission shaft (4), mounting panel (3) link firmly on base (1), has seted up mounting hole one (31) and mounting hole two (32) respectively on mounting panel (3), step motor (2) link firmly on mounting panel (3) side, and motor shaft (21) of step motor (2) rotate and pass mounting hole one (31), has linked firmly drive gear (5) at the tip that motor shaft (21) stretches out, the transmission shaft (4) is rotatably connected in the second mounting hole (32), the transmission shaft (4) is parallel to a motor shaft (21) of the stepping motor (2), one end of the transmission shaft (4) is fixedly connected with the swinging seat (12), the other end of the transmission shaft extends out of the second mounting hole (32), a second transmission gear (6) is fixedly connected to the extending end part of the transmission shaft, the second transmission gear (6) is fan-shaped, and the second transmission gear (6) is meshed with the first transmission gear (5); the utility model discloses a fixing device for fixing the bearing seat, including base (1), mounting panel (3) side is gone up and is seted up fixed orifices (14), fixed cover (33) have perpendicularly on the side of mounting panel (3), and this fixed cover (33) set up with the axle center with two (32) of mounting hole, fixed cover (33) are fixed to be pegged graft in fixed orifices (14) of base (1), transmission shaft (4) rotate and wear to establish in fixed cover (33), and transmission shaft (4) and fixed cover (33) transition fit.
2. The needle pitch adjusting mechanism of a sewing machine according to claim 1, characterized in that a circular positioning groove (34) is formed in the side surface of the mounting plate (3), the positioning groove (34) and the first mounting hole (31) are coaxially arranged, a circular positioning boss (22) is arranged on the end surface of the stepping motor (2), the positioning boss (22) and the motor shaft (21) are coaxially arranged, the positioning boss (22) is inserted into the positioning groove (34), and the outer peripheral wall of the positioning boss (22) is in transition fit with the groove wall of the positioning groove (34).
3. The needle pitch adjusting mechanism of a sewing machine according to claim 2, wherein the end surface of the stepping motor (2) is attached to the side surface of the mounting plate (3), and the stepping motor (2) is fixedly connected to the mounting plate (3) by a screw.
4. The needle pitch adjusting mechanism of a sewing machine according to claim 1, 2 or 3, characterized in that a weight reduction notch (61) is formed on the side surface of the second transmission gear (6), and the weight reduction notch (61) is fan-shaped.
5. The needle pitch adjusting mechanism of a sewing machine according to claim 4, wherein the radius of the second transmission gear (6) is 4 to 6 times the radius of the first transmission gear (5).
6. The needle pitch adjusting mechanism of a sewing machine according to claim 1, 2 or 3, characterized in that the side of the first transmission gear (5) surrounding the motor shaft (21) is provided with an annular limiting convex edge (51), and the limiting convex edge (51) is abutted against the side of the mounting plate (3).
7. The needle pitch adjusting mechanism of a sewing machine according to claim 1, 2 or 3, wherein a gear box cover (7) is fixedly connected to the lower side surface of the base (1), the mounting plate (3) is located outside the base (1) and the gear box cover (7), a mounting groove (71) is formed in the lower side surface of the gear box cover (7) in a concave manner, and the upper portion of the stepping motor (2) is located in the mounting groove (71).
8. The needle pitch adjusting mechanism of a sewing machine according to claim 7, wherein a cover (8) is fixedly attached to the gear box cover (7), a lower portion of the stepping motor (2) is located in the cover (8), a cover plate (81) is provided on one side of the cover (8) opposite to the side of the mounting plate (3), and the first transmission gear (5) and the second transmission gear (6) are located between the side of the mounting plate (3) and the side of the cover plate (81).
9. The needle pitch adjusting mechanism of a sewing machine according to claim 1, 2 or 3, wherein the swing seat (12) is U-shaped, the end of the transmission shaft (4) is fixedly connected with the side surface of the swing seat (12), swing plates (121) are hinged on the inner walls of the two ends of the swing seat (12), a needle pitch crank (111) is fixedly connected on the cloth feeding shaft (11), and the swing plates (121) are hinged with the needle pitch crank (111).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610422294.6A CN106400324B (en) | 2016-06-14 | 2016-06-14 | Needle pitch adjusting mechanism of sewing machine |
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| CN201610422294.6A CN106400324B (en) | 2016-06-14 | 2016-06-14 | Needle pitch adjusting mechanism of sewing machine |
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| CN106400324B true CN106400324B (en) | 2022-06-21 |
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| CN106637701B (en) * | 2017-03-06 | 2019-09-03 | 苏州沃瑞豪兹自动化设备有限公司 | Industrial sewing machine |
| CN107938182A (en) * | 2018-01-08 | 2018-04-20 | 东莞市明珊机械制造有限公司 | A kind of double differential 3D computerized patterns vehicle and horse gram line machine |
| CN109208187A (en) * | 2018-10-19 | 2019-01-15 | 百福工业缝纫机（张家港）有限公司 | Novel automatic feed sewing machine |
| CN111332554B (en) * | 2020-02-12 | 2021-04-06 | 大连理工大学 | Hand-held paper embroidery packaging machine |
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| EP2075121A1 (en) * | 2007-12-19 | 2009-07-01 | fischerwerke GmbH & Co. KG | Improved board of multiple layer glass, particularly of laminated safety glass, and method for producing same |
| CN102830716A (en) * | 2012-08-22 | 2012-12-19 | 中科宇博（北京）文化有限公司 | Mechanical joint and neck and tail structures of bionic mechanical dinosaur |
| CN204058890U (en) * | 2014-08-29 | 2014-12-31 | 西安标准工业股份有限公司 | A kind of Sewing machines utilizing driving stepper motor needle gage governor motion |
| CN105002663A (en) * | 2015-08-20 | 2015-10-28 | 浙江中捷缝纫科技有限公司 | Lockstitch sewing machine |
| CN204918998U (en) * | 2015-08-20 | 2015-12-30 | 浙江中捷缝纫科技有限公司 | Feeding mechanism of flush joint machine |
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| CN106400324A (en) | 2017-02-15 |
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Effective date of registration: 20220530 Address after: 318020 No.318, Jinchuan Road, Xinqian street, Huangyan District, Taizhou City, Zhejiang Province Applicant after: Shanggong sewing machinery (Zhejiang) Co.,Ltd. Address before: 318000 No.1, Airport South Road, Xiachen street, Jiaojiang District, Taizhou City, Zhejiang Province Applicant before: ZHEJIANG SHANGGONG GEMSY CO.,LTD. |
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