Transmission mechanism on pattern sewing machine

Abstract

The utility model relates to a transmission mechanism on a pattern sewing machine, which comprises a driving motor, a first rotating shaft, a connecting shaft, a feeding cam group and a transmission gear group, the transmission gear group comprises a driving gear, a plurality of driven gears and a chain connected with the driving gear and the driven gears, and the transmission mechanism further comprises a clutch component and a second rotating shaft, the clutch assembly comprises a driving wheel, a driven wheel, a movable rod and a driving part, the driving wheel is arranged on an output shaft of the driving motor, the driving gear is arranged on one side of the driving wheel, and the movable rod is arranged in the driving gear in a penetrating mode and matched with the driving gear in an axial sliding and circumferential rotating mode. The driven wheel and the driving piece are arranged at the two ends of the movable rod respectively, and the movable rod can axially slide relative to the driving gear under the action of the driving piece to drive the driven wheel to be meshed with or separated from the driving wheel. By the adoption of the technical scheme, the transmission mechanism on the pattern sewing machine can synchronously achieve feeding and machine needle changing, various patterns can be sewn, and practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine technical field especially a kind of transmission mechanism on pattern sewing machine. BACKGROUND

[0002] Pattern sewing machine is widely used in clothing industry, shoemaking industry because it can sew various patterns.

[0003] The existing pattern sewing machine includes rack, is equipped with machine head on the rack, rotating shuttle component, feeding assembly, needle assembly, transmission gear set and driving motor, rotating shuttle component includes rotating shuttle and the connecting shaft connected with rotating shuttle, feeding assembly includes connecting rod, swing lever and feeding cam set, feeding cam set is rotationally arranged on connecting rod, bearing is equipped on swing lever, bearing is driven swing lever swing to realize feeding in cooperation with feeding cam set, needle assembly includes two needle mounting seats and needle set on two needle mounting seats, driving motor can drive needle mounting seat to move towards rotating shuttle component direction and drive rotary rotation, machine head is equipped with rotating shaft and pattern cam set set on rotating shaft, driving motor drives pattern cam set rotation through transmission gear set to drive needle swing, carries out the sewing of pattern, connecting rod and rotating shaft are synchronously rotated through transmission gear.

[0004] The above-mentioned pattern sewing machine because connecting rod and rotating shaft are synchronously rotated through transmission gear, pattern cam set is always synchronously rotated with feeding cam set, pattern change is relatively fixed, if other pattern is needed, pattern cam set needs to be replaced to realize, it is more inconvenient. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of transmission mechanism on pattern sewing machine, can realize feeding and needle change simultaneously, sew various patterns, and practicality is high.

[0006] The technical solution of the utility model is as follows: a transmission mechanism on a pattern sewing machine, comprising a driving motor, a first rotating shaft, a connecting shaft, a feeding cam group and a transmission gear group, wherein the transmission gear group comprises a driving gear, a plurality of driven gears and a chain connecting the driving gear and the driven gear, a pattern cam and a driven gear are respectively provided at both ends of the connecting shaft, and further comprises a clutch assembly and a second rotating shaft, wherein the clutch assembly comprises a driving wheel, a driven wheel, a movable rod and a driving member, wherein the driving wheel is arranged on the output shaft of the driving motor, the driving gear is arranged on one side of the driving wheel, the movable rod is inserted into the driving gear, and slides axially and rotates circumferentially with the driving gear The gear train is adapted to engage with the gear train by a first gear and a second gear connected to the gear train, wherein the gear train is adapted to engage with the gear train and the gear train is adapted to engage with the gear train.

[0007] By adopting the above technical solution, the driving motor can drive the driving gear to rotate through the engagement between the driven wheel and the driving wheel in the clutch assembly. When the driven wheel is separated from the driving wheel, the driving wheel and the first feeding cam rotate as usual, and the driving gear stops rotating, so the pattern cam and the second feeding cam also stop rotating. The rotation of the pattern cam can drive the two needles to cross, and if the pattern cam does not rotate, the two needles will not cross. Therefore, multiple combinations of cross feeding, non-cross no feeding, cross no feeding and non-cross feeding can be realized, thereby realizing changes in sewing patterns without replacing the pattern cam, and easy operation.

[0008] The utility model is further configured as follows: the driving wheel is provided with a connecting hole and a plurality of connecting grooves on the side facing the driven wheel; the driven wheel and the movable rod are integrally formed; a connecting block is provided on the driven wheel corresponding to each connecting groove position; when the driven wheel is engaged with the driving wheel, the end of the movable rod is inserted into the connecting hole, and the connecting block is inserted into the corresponding connecting groove.

[0009] With the above further arrangement, the connection structure is simple, and the driven wheel is easy to engage or disengage with the driving wheel.

[0010] A further configuration of the present invention is that the connecting block and the connecting groove are arranged in a trapezoidal shape.

[0011] By adopting the above further arrangement, the structure is made more solid when the driven wheel and the driving wheel are engaged, and the driven wheel is better driven to rotate synchronously when the driving wheel rotates.

[0012] The present invention is further configured as follows: a plurality of convex strips are provided on the outer circumferential surface of the movable rod along its circumferential direction; a corresponding groove is provided on the inner circumferential surface of the driving gear; each convex strip is located in the corresponding groove to achieve axial sliding and circumferential rotation cooperation between the movable rod and the driving gear.

[0013] By adopting the above-mentioned further arrangement, the movable rod can slide relative to the driving gear under the action of the driving member, but can also rotate synchronously with the driving gear under the action of the driving motor, resulting in a simple connection structure and convenient transmission.

[0014] The present invention is further configured as follows: a plurality of first splines and second splines are provided on the outer peripheral surface of the first feeding cam, two second splines are provided between two adjacent first splines, and the length of the first splines is greater than that of the second splines.

[0015] It is further configured that a plurality of third splines are provided on the outer peripheral surface of the second feeding cam, and the spacing between two adjacent third splines is greater than the spacing between two adjacent second splines, and smaller than the spacing between two adjacent first splines.

[0016] With the above-mentioned further arrangement, a bearing is provided on the feed rocker on the sewing machine. The bearing can move under the two feed cams and select the corresponding position. During the rotation of the feed cam, the bearing contacts the feed cam. When the spline moves to the bearing position, it presses the bearing to make the rocker swing and feed the material. The distance between adjacent splines is the time distance between two adjacent feeds. The bearing position is adjusted according to the sewing pattern.

[0017] The present invention is further configured as follows: the transmission gear set also includes a first transmission wheel and a second transmission wheel, two driving gears are provided, both of which are provided on the movable rod, and two driven gears are provided on the connecting shaft, wherein one driving gear is connected to one of the driven gears on the connecting shaft through a first chain for synchronous rotation, the other driving gear is connected to the other driven gear on the connecting shaft and the first transmission wheel through a second chain for synchronous rotation, and the second transmission wheel is connected to the driven gear provided on the second rotating shaft through a third chain for synchronous rotation.

[0018] By adopting the above-mentioned further arrangement, through the cooperation of the driving gear, the driven gear, the transmission wheel and the chain, when the driving wheel and the driven wheel are engaged, the second transmission shaft and the connecting shaft can be driven to rotate at the same time, thereby driving the pattern cam and the second feeding cam to rotate. The structure is simple and the connection is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a sewing machine equipped with a transmission mechanism according to a specific embodiment of the present invention;

[0020] Figure 2This is a schematic diagram of a transmission mechanism according to a specific embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of a clutch assembly according to a specific embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of a driving gear according to a specific embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of a driven wheel and a movable rod according to a specific embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram of a driving wheel according to a specific embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the first rotating shaft and the first feeding cam in a specific embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the second rotating shaft and the second feeding cam in a specific embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of a feeding cam assembly according to a specific embodiment of the present invention.

[0028] In the figure, 1. first rotating shaft; 2. connecting shaft; 21. pattern cam; 3. feeding cam group; 31. first feeding cam; 311. first spline; 312. second spline; 32. second feeding cam; 321. third spline; 4. transmission gear group; 41. driving gear; 411. groove; 42. driven gear; 43. first chain; 44. first transmission wheel; 45. second transmission wheel; 46. second chain; 47. third chain; 5. clutch assembly; 51. driving wheel; 511. connecting hole; 512. connecting groove; 52. driven wheel; 521. connecting block; 53. movable rod; 531. convex strip; 54. driving member; 6. second rotating shaft; 7. bearing; 8. mounting shaft. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in this embodiment with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] It should be noted that in the description of this utility model, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being described. In the description of this utility model, "several" means at least two, such as two or three, unless otherwise specifically defined.

[0032] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that technical personnel in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0033] like Figures 1-9As shown, a transmission mechanism on a pattern sewing machine includes a driving motor, a first rotating shaft 1, a connecting shaft 2, a feed cam group 3 and a transmission gear group 4, wherein the transmission gear group 4 includes a driving gear 41, a plurality of driven gears 42 and a chain 43 connecting the driving gear 41 and the driven gear 42. The connecting shaft 2 is provided with a pattern cam 21 and a driven gear 42 at both ends, and further includes a clutch assembly 5 and a second rotating shaft 6. The clutch assembly 5 includes a driving wheel 51, a driven wheel 52, a movable rod 53 and a driving member 54. The driving member 54 is preferably provided with a cylinder. The driving wheel 51 is provided on the output shaft of the driving motor. The driving gear 41 is arranged on one side of the driving wheel 51, and the movable rod 53 is inserted into the driving gear 41 and cooperates with the driving gear 41 to slide axially and rotate circumferentially. The driven wheel 52 and the driving member 54 are respectively arranged at both ends of the movable rod 53. The movable rod 53 can slide axially relative to the driving gear 41 under the action of the driving member 54, driving the driven wheel 52 to engage or disengage with the driving wheel 51. The feeding cam group 3 includes a first feeding cam 31 and a second feeding cam 32. The second rotating shaft 6 is rotatably arranged in the first rotating shaft 1, and both ends extend to the outside of the first rotating shaft 1. The first feeding cam 31 is sleeved on the first rotating shaft 1 and rotates with The first rotating shaft rotates synchronously, and the first feeding cam 31 can be installed on the first rotating shaft by screws or by interference fit. The second feeding cam 32 and the driven gear 42 are provided at both ends of the second rotating shaft 6. The second feeding cam 32 and the driven gear 42 can be fixedly installed on the second rotating shaft 6 by screws. The driven gear rotates to drive the second rotating shaft to rotate, and the second rotating shaft drives the second feeding cam to rotate. When the driven wheel 52 is engaged with the driving wheel 51, the second rotating shaft 6, the connecting shaft 2 and the movable rod 53 rotate synchronously. When the driven wheel 52 is separated from the driving wheel 51, the second rotating shaft 6, the connecting shaft 2 and the movable rod 53 stop rotating. The driven wheel 52 in the clutch assembly 5 is engaged with the driving wheel 51, and the driving motor can drive the driving gear 41 to rotate. When the driven wheel 52 is separated from the driving wheel 51, the driving wheel 51 and the first feeding cam 31 rotate as usual, and the driving gear 41 stops rotating, so the pattern cam 21 and the second feeding cam 32 also stop rotating. The rotation of the pattern cam 21 can drive the two needles to cross. If the pattern cam 21 does not rotate, the two needles will not cross. Therefore, multiple combinations of cross feeding, non-cross and no feeding, cross and no feeding, and no cross feeding can be realized, thereby realizing changes in sewing patterns without replacing the pattern cam 21, which is easy to operate.

[0034] The driving wheel 51 is provided with a connecting hole 511 and a plurality of connecting grooves 512 on the side facing the driven wheel 52. The driven wheel 52 and the movable rod 53 are integrally formed. The driven wheel 52 is provided with a connecting block 521 corresponding to each connecting groove 512. When the driven wheel 52 is engaged with the driving wheel 51, the end of the movable rod 53 is inserted into the connecting hole 511, and the connecting block 521 is inserted into the corresponding connecting groove 512. The connection structure is simple, which is convenient for the driven wheel 52 to be engaged or separated from the driving wheel 51. Of course, the connecting block can also be located on the driving wheel and the connecting groove can be located on the driven wheel, or other engagement methods can be adopted, such as a serrated structure engagement, as long as the driving wheel and the driven wheel can rotate synchronously after contact. Specifically, the connecting block 521 and the connecting groove 512 are trapezoidal in shape, or other shapes can be used, so that the structure is more firm when the driven wheel 52 is engaged with the driving wheel 51, and the driven wheel 52 can be better driven to rotate synchronously when the driving wheel 51 rotates.

[0035] The outer circumferential surface of the movable rod 53 is provided with a plurality of ridges 531 along its circumferential direction, and the inner circumferential surface of the driving gear 41 is correspondingly provided with grooves 411. Each ridge 531 is located in the corresponding groove 411 to achieve axial sliding and circumferential rotation cooperation between the movable rod 53 and the driving gear 41, so that the movable rod 53 can slide relative to the driving gear 41 under the action of the driving member 54, but can rotate synchronously with the driving gear under the action of the driving motor, resulting in a simple connection structure and convenient transmission.

[0036] A plurality of first splines 311 and second splines 312 are provided on the outer circumference of the first feeding cam 31, and two second splines 312 are provided between two adjacent first splines 311, and the length of the first spline 311 is greater than the length of the second spline 312; a plurality of third splines 321 are provided on the outer circumference of the second feeding cam 32, and the spacing between two adjacent third splines 321 is greater than the spacing between two adjacent second splines 312, and smaller than the spacing between two adjacent first splines 311. A bearing 7 is provided on the feeding rocker on the sewing machine, and the bearing 7 can move under the two feeding cams and select the corresponding position. During the rotation of the feeding cam, the bearing contacts the feeding cam. When the spline moves to the bearing position, it presses the bearing to make the rocker swing to feed. The spacing between two adjacent splines is the time spacing between two adjacent feedings. The bearing position is adjusted according to the sewing pattern.

[0037] The transmission gear set 4 further comprises a first transmission wheel 44 and a second transmission wheel 45 coaxially arranged on the mounting shaft 8, two driving gears 41 are arranged on the movable rod 53, and two driven gears 42 are arranged on the connecting shaft 2, one of the driving gears 41 is connected with one of the driven gears 42 on the connecting shaft 2 through the first chain 43 to rotate synchronously, the other driving gear 41 is connected with the first transmission wheel 44 and the other driven gear 42 on the connecting shaft 2 through the second chain 46 to rotate synchronously, the second transmission wheel 45 is connected with the driven gear 42 arranged on the second rotating shaft 6 through the third chain 47 to rotate synchronously, when the driven gear rotates, the second rotating shaft 6 and the connecting shaft 2 are driven to rotate, and then the pattern cam 21 and the second feeding cam 32 are driven to rotate, so that the structure is simple and the connection is convenient.

Claims

1. A transmission mechanism on a pattern sewing machine, comprising a driving motor, a first rotating shaft (1), a connecting shaft (2), a feeding cam group (3) and a transmission gear group (4), wherein the transmission gear group (4) comprises a driving gear (41) and a plurality of driven gears (42), and a pattern cam (21) and a driven gear (42) are respectively provided at both ends of the connecting shaft (2), characterized in that: The invention also includes a clutch assembly (5) and a second rotating shaft (6), wherein the clutch assembly (5) includes a driving wheel (51), a driven wheel (52), a movable rod (53) and a driving member (54), wherein the driving wheel (51) is arranged on the output shaft of the driving motor, the driving gear (41) is arranged on one side of the driving wheel (51), the movable rod (53) is inserted into the driving gear (41) and cooperates with the driving gear (41) in axial sliding and circumferential rotation, the driven wheel (52) and the driving member (54) are respectively arranged at both ends of the movable rod (53), and the movable rod (53) can slide axially relative to the driving gear (41) under the action of the driving member (54), driving the driven wheel (52) and the driving wheel (5 1) Engagement or separation, the feeding cam group (3) includes a first feeding cam (31) and a second feeding cam (32), the second rotating shaft (6) is rotatably arranged in the first rotating shaft (1), and both ends extend outside the first rotating shaft (1), the first feeding cam (31) is sleeved on the first rotating shaft (1), and the second feeding cam (32) and the driven gear (42) are provided at both ends of the second rotating shaft (6), when the driven wheel (52) is engaged with the driving wheel (51), the second rotating shaft (6), the connecting shaft (2) and the movable rod (53) rotate synchronously, and when the driven wheel (52) is separated from the driving wheel (51), the second rotating shaft (6), the connecting shaft (2) and the movable rod (53) stop rotating.

2. The transmission mechanism of the pattern sewing machine according to claim 1, characterized in that: The driving wheel (51) is provided with a connecting hole (511) and a plurality of connecting grooves (512) on a side facing the driven wheel (52). The driven wheel (52) and the movable rod (53) are integrally formed. Connecting blocks (521) are provided on the driven wheel (52) at positions corresponding to the connecting grooves (512). When the driven wheel (52) is engaged with the driving wheel (51), the end of the movable rod (53) is inserted into the connecting hole (511), and the connecting block (521) is inserted into the corresponding connecting groove (512).

3. The transmission mechanism of the pattern sewing machine according to claim 2, characterized in that: The connecting block (521) and the connecting groove (512) are arranged in a trapezoidal shape.

4. The transmission mechanism of the pattern sewing machine according to claim 1, 2 or 3, characterized in that: A plurality of convex strips (531) are provided on the outer circumferential surface of the movable rod (53) along its circumferential direction, and a corresponding groove (411) is provided on the inner circumferential surface of the driving gear (41). Each convex strip (531) is located in the corresponding groove (411) to achieve axial sliding and circumferential rotation cooperation between the movable rod (53) and the driving gear (41).

5. The transmission mechanism of the pattern sewing machine according to claim 1, 2 or 3, characterized in that: A plurality of first splines (311) and second splines (312) are provided on the outer peripheral surface of the first feeding cam (31), two second splines (312) are provided between two adjacent first splines (311), and the length of the first splines (311) is greater than the length of the second splines (312).

6. The transmission mechanism of the pattern sewing machine according to claim 5, characterized in that: A plurality of third splines (321) are provided on the outer peripheral surface of the second feeding cam (32), and the spacing between two adjacent third splines (321) is greater than the spacing between two adjacent second splines (312) and smaller than the spacing between two adjacent first splines (311).

7. The transmission mechanism of the pattern sewing machine according to claim 1, 2 or 3, characterized in that: The transmission gear set (4) further comprises a first transmission wheel (44) and a second transmission wheel (45), two driving gears (41) are provided, both of which are provided on the movable rod (53), and two driven gears (42) are provided on the connecting shaft (2), wherein one driving gear (41) is connected to one of the driven gears (42) on the connecting shaft (2) through a first chain (43) for synchronous rotation, and the other driving gear (41) is connected to the other driven gear (42) on the connecting shaft (2) and the first transmission wheel (44) through a second chain (46) for synchronous rotation, and the second transmission wheel (45) is connected to the driven gear (42) provided on the second rotating shaft (6) through a third chain (47) for synchronous rotation.

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