Needle pitch adjusting structure

Abstract

The utility model provides a stitch length adjusting structure which comprises a machine shell and an adjusting crank set, the adjusting crank set is rotationally arranged in the machine shell and used for adjusting the stitch length of a sewing machine, the stitch length adjusting structure further comprises a first driving source and a connecting assembly, the first driving source is fixedly arranged on the machine shell, and the connecting assembly is arranged between the adjusting crank set and the first driving source. The connecting assembly is fixed to the input end of the adjusting crank set, the first driving source drives the connecting assembly to swing and drives the adjusting crank set to rotate, the first driving source drives the connecting assembly to swing and enables the adjusting crank set to rotate, and therefore the stitch length is controlled, and the function of automatically controlling the stitch length is achieved. The stitch length precision is improved; and meanwhile, the sewing machine can automatically perform typesetting sewing through a numerical control system.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine especially, relate to a stitch length adjusting structure. BACKGROUND

[0002] At present, the patent no. CN221645241U discloses stitch length adjusting structure and binding machine, including casing, adjusting shaft, stitch length adjusting crank and connecting piece, still including elastic piece, elastic piece one end is connected with casing, the other end is connected with stitch length adjusting crank, and elastic piece includes spring, when rotating adjusting shaft, adjusting crank occurs rotation, thereby adjusting stitch length.

[0003] The above patent still has the deficiency, the above patent can only be adjusted to stitch length by operating personnel rotating adjusting shaft, and the rotation angle of adjusting shaft determines the size of stitch length, and the operating personnel can only judge the size of stitch length by experience and naked eye, and the equipment is not suitable for large quantities, long time automatic sewing. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a stitch length adjusting structure with the function of automatically adjusting stitch length.

[0005] In order to solve the above technical problem, the technical scheme of the utility model is: a stitch length adjusting structure, including casing and adjusting crank group, the adjusting crank group is rotatably arranged in the casing and is used for adjusting the stitch length of sewing machine, further including drive source one and connecting assembly, the drive source one is fixedly arranged on the casing, the connecting assembly is arranged between the adjusting crank group and the drive source one, the connecting assembly is fixed with the input end of the adjusting crank group, and the drive source one drives the connecting assembly to swing and drives the adjusting crank group to rotate.

[0006] Through the above technical means, the connecting assembly is driven to swing by the drive source one, and the adjusting crank group is rotated, so that the size of stitch length is controlled, the function of automatically controlling stitch length is realized, the stitch length precision is improved, and the sewing machine can be automatically laid out and sewn through the numerical control system.

[0007] Preferably, the connecting assembly includes a lever and a rotating rod one, the rotating rod one is fixed with the input end of the adjusting crank group, the lever is hinged on the casing, one end of the lever is driven to swing around the hinge point by the drive source one, and the other end of the lever drives the rotating rod one to rotate and drives the adjusting crank group to rotate.

[0008] Through the above technical means, the lever and the rotating rod one are arranged, so that the drive source one drives the adjusting crank group to rotate.

[0009] Preferably, the driving source one includes an electric cylinder, the output end of the driving source one is fixedly provided with an extension plate, the bottom of the extension plate is rotationally provided with a roller one, the roller one abuts against the lower side of a lever, the lever is further provided with a waist groove at the end away from the roller one, the rotating rod one is provided with a roller two, the roller two is slidingly arranged in the waist groove, and the adjusting crank set is further provided with a reset tension spring.

[0010] Through the technical means, the freedom between the lever and the rotating rod one is increased by arranging the roller one and the roller two, the lever and the rotating rod one will not be automatically reset when the electric cylinder moves downward.

[0011] Preferably, the side end of the rotating rod one is further fixedly provided with a rotating rod two, the machine shell is provided with a needle spacing scale plate, the needle spacing scale plate is provided with a visible slot, and the end of the rotating rod two moves along the visible slot when the rotating rod two rotates with the rotating rod one.

[0012] Through the technical means, the needle spacing is visualized by arranging the rotating rod two and the needle spacing scale plate, so that the operator can observe conveniently.

[0013] Preferably, the machine shell is further provided with a tooth seat one, a tooth seat two and a crank rocker assembly, the crank rocker assembly drives the tooth seat one and the tooth seat two to swing, and the adjusting crank set drives the tooth seat two to move close to or away from the tooth seat one.

[0014] Through the technical means, the tooth seat one and the tooth seat two are driven to swing by the crank rocker assembly, so that automatic feeding is realized, and the tooth seat two and the tooth seat one are driven to move close to or away from each other by the adjusting crank set, so that the tooth spacing is adjusted.

[0015] Preferably, the crank rocker assembly includes a power crank and a limiting rocker, the output ends of the power crank and the limiting rocker are provided with sliding blocks, the tooth seat one and the tooth seat two are provided with sliding grooves, the sliding blocks and the sliding grooves are slidingly matched, and the tooth seat one and the tooth seat two swing and transport the cloth when the power crank rotates.

[0016] Through the technical means, the tooth seat one and the tooth seat two swing by the rotation of the power crank and the limiting of the limiting rocker.

[0017] Preferably, the adjusting crank set comprises an input crank, a connecting crank one, a connecting crank two, an output crank and a rotating rod, the input crank is rotationally arranged on a casing, the connecting crank one is rotationally arranged at a tail of the input crank, the connecting crank two is rotationally arranged at a tail of the connecting crank one, the output crank is rotationally arranged at a tail of the connecting crank two, the rotating rod is rotationally arranged in the casing and fixed with the tail of the output crank, the rotating rod is provided with an arc-shaped slot near a side of the second tooth holder, the second tooth holder is provided with a sliding rod and slides in the arc-shaped slot, and the second tooth holder moves along the sliding rod when the rotating rod rotates.

[0018] Through the above technical means, the rotation of the input crank drives the movement of the second tooth holder, so that the adjustment of the needle spacing of the sewing machine is completed.

[0019] Compared with the prior art, the utility model has the advantages that:

[0020] 1. The lever is driven to rotate by the electric cylinder, and the rotation of the rotating rod one is driven by the cooperation between the lever and the roller one and the roller two, so that the input crank is driven to rotate, the second tooth holder is driven to approach or move away from the first tooth holder, and the adjustment of the needle spacing is realized.

[0021] 2. The rotating rod two is arranged at the tail of the rotating rod one, and the needle spacing scale plate is arranged, so that the needle spacing is visualized, and the operator can observe conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Structure diagram of the embodiment Figure 1 ;

[0023] Figure 2 Structure diagram of the embodiment Figure 2 ;

[0024] Figure 3 Partial structure diagram of the embodiment Figure 1 ;

[0025] Figure 4 Partial structure diagram of the embodiment Figure 2 ;

[0026] Figure 5 Partial structure diagram of the embodiment Figure 3 ;

[0027] Figure 6 Front view of the adjusting crank set and the connecting assembly.

[0028] : 1, casing; 2, adjusting crank group; 21, input crank; 22, connecting crank one; 23, connecting crank two; 24, output crank; 25, rotating rod; 251, arc-shaped groove; 26, reset tension spring; 3, driving source one; 31, electric cylinder; 4, connecting assembly; 41, extension plate; 411, roller one; 42, lever; 421, waist groove; 43, rotating rod one; 431, roller two; 44, rotating rod two; 45, needle distance scale plate; 46, visual groove; 5, tooth seat one; 51, sliding groove; 6, tooth seat two; 61, sliding rod; 71, power crank; 711, servo motor; 72, limiting rocker; 73, sliding block; 8, crank rocker assembly. DETAILED DESCRIPTION

[0029] The specific embodiments of the utility model are further described in detail below in combination with the drawings, so that the technical scheme of the utility model is easier to understand and master.

[0030] A needle distance adjusting structure, as shown in Figure 1 , Figure 2 , Figure 3 , comprises a casing 1 and an adjusting crank group 2, the adjusting crank group 2 is rotationally arranged in the casing 1 and is used for adjusting the needle distance of a sewing machine, further comprises a driving source one 3 and a connecting assembly 4, the driving source one 3 is fixedly arranged on the casing 1, the connecting assembly 4 is arranged between the adjusting crank group 2 and the driving source one 3, the connecting assembly 4 is fixed with the input end of the adjusting crank group 2, and the driving source one 3 drives the connecting assembly 4 to swing and drives the adjusting crank group 2 to rotate.

[0031] As shown in Figure 4 , Figure 5 , Figure 6 , the casing 1 further comprises a tooth seat one 5, a tooth seat two 6 and a crank rocker assembly 8, the crank rocker assembly 8 drives the tooth seat one 5 and the tooth seat two 6 to swing, when the driving source one 3 drives the extension plate 41 to move upwards, the tooth seat two 6 moves away from the tooth seat one 5, when the driving source one 3 drives the extension plate 41 to move downwards, the tooth seat two 6 moves close to the tooth seat one 5, so that the tooth distance is adjusted, the crank rocker assembly 8 comprises a power crank 71 and a limiting rocker 72, the tail of the power crank 71 is fixedly provided with a servo motor 711, the output ends of the power crank 71 and the limiting rocker 72 are provided with sliding blocks 73, the tooth seat one 5 and the tooth seat two 6 are both provided with sliding grooves 51, the sliding blocks 73 are slidably matched with the sliding grooves 51, when the power crank 71 rotates, the tooth seat one 5 and the tooth seat two 6 swing and transport the cloth.

[0032] As shown in Figure 4 , Figure 5 , Figure 6As shown, the adjusting crank group 2 includes an input crank 21, a connecting crank one 22, a connecting crank two 23, an output crank 24 and a rotating rod 25, the input crank 21 is rotationally arranged on the casing 1, the connecting crank one 22 is rotationally arranged at the tail of the input crank 21, the connecting crank two 23 is rotationally arranged at the tail of the connecting crank one 22, the output crank 24 is rotationally arranged at the tail of the connecting crank two 23, and the rotating rod 25 is rotationally arranged in the casing 1 and fixed with the tail of the output crank 24, when the input crank 21 rotates, the output crank 24 drives the rotating rod 25 to rotate through the cooperation between the connecting crank one 22 and the connecting crank two 23, the rotating rod 25 is provided with an arc-shaped slot 251 near the side of the holder two 6, the holder two 6 is provided with a sliding rod 61 and slides in the arc-shaped slot 251, when the arc-shaped slot 251 rotates around the center point of the rotating rod 25, the holder two 6 is pulled away from the holder one 5, thereby adjusting the stitch length.

[0033] As shown in Figure 2 , Figure 3 , Figure 4 , the driving source one 3 includes an electric cylinder 31 arranged outside the casing 1, the output end of the electric cylinder 31 is provided with an extension plate 41, the extension plate 41 is L-shaped, the connecting assembly 4 includes a lever 42 and a rotating rod one 43, the rotating rod one 43 is fixed with the input crank 21, the center position of the lever 42 is hinged on the casing 1, the extension plate 41 extends into the bottom side of the lever 42 and is provided with a roller one 411, the roller one 411 abuts against the lower end face of the lever 42, the rotating rod one 43 is provided with a roller two 431 near the end of the lever 42, the lever 42 is provided with a waist slot 421 on the end face near the side of the rotating rod one 43, the roller two 431 extends into the waist slot 421, when the driving source one 3 drives the extension plate 41 to move up and down, the roller one 411 drives one end of the lever 42 to swing around the hinge point, the other end of the lever 42 drives the rotating rod one 43 to rotate on the casing 1 together with the input crank 21 through the cooperation between the waist slot 421 and the roller two 431, thereby realizing the stitch length adjustment, the adjusting crank group 2 is further provided with a reset tension spring 26, one end of the reset tension spring 26 is fixed with the input crank 21, and the other end is fixed with the casing 1, thereby when the driving source one 3 retracts, the reset tension spring 26 drives the input crank 21 to reverse, and the rotating rod one 43 is completed reset by abutting against the roller one 411.

[0034] The driving source one 3 drives the connecting assembly 4 to swing, and drives the adjusting crank group 2 to rotate, thereby controlling the size of the stitch length, realizing the function of automatically controlling the stitch length, improving the stitch length precision, and enabling the sewing machine to automatically arrange and sew through the numerical control system.

[0035] As shown in Figure 4 , Figure 5As shown, the side end of the rotating rod one 43 is also fixedly provided with a rotating rod two 44, the shell 1 is provided with a needle distance scale plate 45, the needle distance scale plate 45 is provided with a visible slot 46, and the end of the rotating rod two 44 moves along the visible slot 46 when the rotating rod two 44 rotates with the rotating rod one 43, thereby facilitating the operator to observe.

[0036] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific embodiments, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A stitch length adjustment structure, comprising a housing (1) and an adjustment crank assembly (2), wherein the adjustment crank assembly (2) is rotatably disposed within the housing (1) and is used to adjust the stitch length of a sewing machine, characterized in that: Also include drive source (3) and connecting components (4), drive source (3) is fixedly arranged on the casing (1), the connecting components (4) are arranged between the adjusting crank group (2) and drive source (3), the connecting components (4) are fixed with the input end of adjusting crank group (2), and drive source (3) drives the oscillation of connecting components (4) and drives the rotation of adjusting crank group (2).

2. The stitch length adjusting structure according to claim 1, characterized by: The connecting components (4) include a lever (42) and a rotating rod (43), the rotating rod (43) is fixed with the input end of the adjusting crank group (2), the lever (42) is hinged on the casing (1), one end of the lever (42) is driven to oscillate around the hinge point by the drive source (3), and the other end of the lever (42) drives the rotating rod (43) to rotate and drives the adjusting crank group (2) to rotate.

3. The stitch length adjustment structure according to claim 2, wherein: The drive source (3) includes an electric cylinder (31), the output end of the drive source (3) is fixedly provided with an extension plate (41), the bottom of the extension plate (41) is rotatably provided with a roller (411), the roller (411) abuts against the lower side of the lever (42), the lever (42) is further provided with a waist groove (421) at the end away from the roller (411), the rotating rod (43) is provided with a roller (431), and the roller (431) is slidably arranged in the waist groove (421).

4. The stitch length adjustment structure according to claim 2, wherein: The side end of the rotating rod (43) is further fixedly provided with a rotating rod (44), the casing (1) is provided with a needle distance scale plate (45), the needle distance scale plate (45) is provided with a visible slot (46), and the end of the rotating rod (44) moves along the visible slot (46) when the rotating rod (44) rotates with the rotating rod (43).

5. The stitch length adjustment structure according to claim 1, wherein: The casing (1) is further provided with a tooth seat (5), a tooth seat (6) and a crank rocker assembly (8), the crank rocker assembly (8) drives the shaking of the tooth seat (5) and the tooth seat (6), and the adjusting crank group (2) drives the tooth seat (6) to approach or move away from the tooth seat (5).

6. A gauge adjustment structure according to claim 5, wherein: The crank rocker assembly (8) includes a power crank (71) and a limiting rocker (72), the output ends of the power crank (71) and the limiting rocker (72) are provided with sliding blocks (73), the tooth seat (5) and the tooth seat (6) are provided with sliding grooves (51), the sliding blocks (73) and the sliding grooves (51) are slidably connected, and the tooth seat (5) and the tooth seat (6) oscillate and transport the cloth when the power crank (71) rotates.

7. A gauge adjustment structure according to claim 6, wherein: The adjusting crank group (2) comprises an input crank (21), a connecting crank one (22), a connecting crank two (23), an output crank (24) and a rotating rod (25), the input crank (21) is rotationally arranged on the casing (1), the connecting crank one (22) is rotationally arranged at the tail of the input crank (21), the connecting crank two (23) is rotationally arranged at the tail of the connecting crank one (22), the output crank (24) is rotationally arranged at the tail of the connecting crank two (23), the rotating rod (25) is rotationally arranged in the casing (1) and fixed with the tail of the output crank (24), the rotating rod (25) is provided with an arc-shaped slot (251) near the side of the dental seat two (6), the dental seat two (6) is provided with a sliding rod (61) and slides in the arc-shaped slot (251), when the rotating rod (25) rotates, the dental seat two (6) moves along the sliding rod (73).

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