Driving mechanism of high-speed double-thread chained sewing machine

Abstract

The utility model discloses a high-speed double-thread chained sewing machine driving mechanism which comprises a shell, a detachable driving mechanism and a pressing mechanism, an end cover is arranged on the right side of the shell, a machine needle is arranged in the middle of the left side of the shell, and a needle pitch scale plate is arranged in the middle of the right side of the front end of the shell. The detachable driving mechanism comprises a mounting column, a protrusion, a double-groove belt wheel, an upper belt wheel, a lower belt wheel and a hand wheel, the mounting column is rotationally connected to the lower end of the left side wall of the end cover, the outer surface of the mounting column is sleeved with the double-groove belt wheel through the protrusion, and the upper belt wheel is rotationally connected to the upper end of the right side of the shell; according to the driving mechanism of the high-speed double-thread chained sewing machine, the belt wheels can be rapidly mounted and dismounted, replacement of a belt is facilitated, the belt can be rapidly kept in a tight state at any time, and the situation that the machine body is damaged due to the fact that the belt is aged and falls off is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine drive technical field, concretely is high -speed double line chain type sewing machine drive mechanism. BACKGROUND

[0002] With the improvement of living standards, the pursuit of various clothes promotes the development of modern textile industry, and sewing is an important link of the textile industry, which needs to use a sewing machine. The sewing machine is a machine that forms one or more stitches on the sewing material with one or more sewing threads, and interweaves or sews one or more layers of the sewing material. The sewing machine can sew cotton, hemp, silk, wool, synthetic fiber and other fabrics, and leather, plastic and paper products. The sewn stitches are neat, beautiful, flat and firm. The sewing speed is fast, and the use is simple. According to the purpose of the sewing machine, it can be divided into household sewing machines, industrial sewing machines and service industry sewing machines between the two. According to the driving mode, it can be divided into hand-operated, foot-operated and electric sewing machines. According to the stitches, it can be divided into imitation hand-stitching, lock stitch, single-thread chain stitch, double-thread or multi-thread chain stitch, single-thread or multi-thread overlock chain stitch and multi-thread cover chain stitch sewing machine. Among them, the high-speed double-thread chain stitch sewing machine driven by electricity is the most common. The existing high-speed double-thread chain stitch sewing machine is driven by a motor. The motor drives the needle and the thread wheel to rotate through a belt pulley and a belt, so as to realize the sewing work of the cloth. The belt will be aged and loose after a long time of work. In severe cases, the belt will fall off and damage the machine body. The traditional high-speed double-thread chain stitch sewing machine cannot quickly fasten the loose and aged belt. The belt pulley and the motor are fastened by a large number of bolts, which is not convenient for quickly replacing the belt, and affects the sewing efficiency. Therefore, we propose a high-speed double-thread chain stitch sewing machine drive mechanism. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the technical problem of overcoming the defects of the prior art, and provides a high-speed double-thread chain stitch sewing machine drive mechanism, which can quickly install and dismount the belt pulley, facilitate the replacement of the belt, and also can quickly and at any time keep the belt in a tight state to prevent the belt from falling off and damaging the machine body due to aging, and can effectively solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a high-speed double-thread chain stitch sewing machine drive mechanism, comprising a shell, a detachable drive mechanism and a pressing mechanism.

[0005] The shell is provided with an end cover on the right side, a needle is arranged in the middle of the left side of the shell, and a needle spacing dial is arranged in the middle of the front right side of the shell.

[0006] The detachable driving mechanism comprises a mounting column, a protrusion, a double-groove belt pulley, an upper belt pulley, a lower belt pulley and a hand wheel, the mounting column is rotationally connected to the lower end of the left side wall of the end cover, the double-groove belt pulley is sleeved on the outer surface of the mounting column through the protrusion, the upper belt pulley is rotationally connected to the upper end of the right side of the shell, the lower belt pulley is rotationally connected to the middle part of the right side of the shell, the upper belt pulley and the lower belt pulley are both transmissionally connected with the double-groove belt pulley through a belt, and the hand wheel is arranged at the right end of the upper belt pulley, so that the needle and the thread wheel can be quickly driven to rotate.

[0007] The pressing mechanism is arranged in the middle of the interior of the end cover, is cooperatively arranged with the detachable driving mechanism, can quickly install and dismount the belt pulley, is convenient for replacement of the belt, can also quickly and at any time keep the belt in a tight state, prevents the belt from being damaged due to aging and falling off, and prevents the machine body from being damaged.

[0008] Further, the detachable driving mechanism further comprises a quick-release assembly, the quick-release assembly comprises rolling grooves and limiting balls, the rolling grooves are all arranged in the middle of the interior of the mounting column, the limiting balls are all slidingly connected to the interior of the rolling grooves, the inner wall of the double-groove belt pulley is provided with uniformly distributed grooves, the rolling grooves are vertically adjacent to the grooves, the outer surfaces of the limiting balls on the same side are cooperatively arranged with the inner walls of the grooves, and the limiting balls provide a basis for fixing and releasing of the double-groove belt pulley.

[0009] Further, the quick-release assembly further comprises a sliding groove, a limiting column, a mounting sheet, a tension spring and a pull handle, the sliding groove is arranged in the interior center of the mounting column, the limiting column is slidingly connected to the interior of the sliding groove, the outer surface of the limiting column is cooperatively arranged with the limiting ball, the mounting sheet is arranged on the left side of the limiting column, the tension spring is arranged between the left side of the mounting sheet and the inner wall of the sliding groove, and the pull handle is arranged on the right side of the limiting column.

[0010] Further, the detachable driving mechanism further comprises a motor, an inner cavity is arranged in the right lower end of the interior of the shell, the motor is arranged in the inner cavity, the input end of the motor is electrically connected with the output end of the single-chip microcomputer, and the output shaft right end of the motor is fixedly connected with the left end of the mounting column, so as to provide stable driving for sewing work.

[0011] Further, the pressing mechanism comprises a mounting block, a mounting groove, a sliding block, a sliding hole, a sliding column, a pressing wheel and a spring, the mounting block is arranged in the middle of the front end of the end cover, the mounting groove is arranged in the middle of the interior of the mounting block, the sliding block is slidingly connected to the interior of the mounting groove, the sliding hole is arranged in the middle of the left and right sides of the sliding block, the sliding column is slidingly connected to the interior of the sliding hole, the pressing wheel is arranged at the rear end of the sliding column, the outer edge of the pressing wheel is cooperatively arranged with the outer surface of the belt, the spring is arranged between the rear end of the sliding block and the front end of the pressing wheel, and the spring is sleeved on the outer surface of the sliding column.

[0012] Further, the pressing mechanism further comprises a lead screw and a knob, the lead screw is rotationally connected to the inside of the mounting block, the outer surface of the rear side of the lead screw is threadedly connected to the inside of the middle of the sliding block, and the knob is arranged on the front end of the lead screw, so that the belt can be quickly pressed and prevented from loosening and falling off.

[0013] Further, the single-chip microcomputer is arranged on the upper end of the right side of the front end of the shell, the input end of the single-chip microcomputer is electrically connected to the external power supply, and control effect is provided for sewing work.

[0014] Compared with the prior art, the high-speed double-line chain sewing machine driving mechanism has the following advantages.

[0015] 1. Pull the handle to the right, drive the limiting column to move to the right, and expand the tension spring until the thin rod of the limiting column is vertically adjacent to the limiting ball. At this time, the side of the limiting ball close to the thin rod of the limiting column is not stressed, and the double-groove pulley is pulled to the right at this time. The friction force generated extrudes the limiting ball, and the two limiting balls are displaced inward until the limiting ball leaves the inside of the groove. At this time, the limiting effect of the double-groove pulley disappears, and the double-groove pulley is quickly detached from the mounting column and is removed. Then, the new belt can be conveniently and quickly replaced. After replacing the new belt, align the double-groove pulley with the protrusion, and then set the double-groove pulley on the outer surface of the mounting column. Release the handle, and the tension spring is not stressed and is contracted, driving the limiting column to move to the left and return to the original position. At this time, the thick rod of the limiting column presses the two limiting balls, and the limiting balls are stressed and move outward until the limiting ball far from the limiting column enters the inside of the groove. At this time, the double-groove pulley is fixed, and the replacement work of the belt is completed. The belt pulley of the high-speed double-line chain sewing machine can be quickly installed and detached, and the replacement of the belt of the high-speed double-line chain sewing machine driving mechanism is facilitated.

[0016] 2. Rotate the knob, and the lead screw also rotates. With the rotation of the lead screw, the sliding block moves backward, slowly compresses the spring, and slowly contracts the spring. The elastic deformation of the spring continuously presses the pressing wheel, so that the outer edge of the pressing wheel is always tightly attached to the outer surface of the belt pulley, preventing the belt from loosening. The farther the sliding block moves backward, the stronger the pressing effect of the pressing wheel on the belt. The belt of the high-speed double-line chain sewing machine driving mechanism is kept in a tense state at any time, preventing the belt from aging, falling off and damaging the machine body due to the aging of the belt of the high-speed double-line chain sewing machine driving mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is a structural schematic view of the detachable driving mechanism and the pressing mechanism of the utility model;

[0019] Figure 3 It is a sectional structural schematic view of the detachable driving mechanism of the utility model;

[0020] Figure 4 It is the cross section structure schematic view of the compression mechanism of the utility model.

[0021] In the figure: 1 shell, 2 end cap, 3 needle, 4 detachable drive mechanism, 41 mounting column, 42 protrusion, 43 double-groove pulley, 44 upper pulley, 45 lower pulley, 46 hand wheel, 47 quick-release assembly, 471 sliding slot, 472 limit post, 473 mounting piece, 474 tension spring, 475 rolling groove, 476 limit ball, 477 pull handle, 48 motor, 5 compression mechanism, 51 mounting block, 52 mounting groove, 53 sliding block, 54 sliding hole, 55 sliding column, 56 compression wheel, 57 spring, 58 lead screw, 59 knob, 6 inner cavity, 7 gauge dial, 8 single-chip microcomputer. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] Please refer to Figures 1-4 The embodiment provides a technical scheme: a high-speed double-line chain type sewing machine drive mechanism, which comprises a shell 1, a detachable drive mechanism 4 and a compression mechanism 5.

[0024] The shell 1 is provided with an end cap 2 on the right side, a needle 3 is arranged on the left side of the middle part of the shell 1, a gauge dial 7 is arranged on the front end of the right side of the shell 1, the needle spacing can be adjusted conveniently, and the sewing work can be controlled by the single-chip microcomputer 8.

[0025] The detachable driving mechanism 4 comprises a mounting column 41, a protrusion 42, a double-groove pulley 43, an upper pulley 44, a lower pulley 45 and a hand wheel 46. The mounting column 41 is rotationally connected to the lower end of the left side wall of the end cover 2. The double-groove pulley 43 is sleeved on the outer surface of the mounting column 41 through the protrusion 42. The protrusion 42 provides limiting and guiding effects for the installation of the double-groove pulley 43. The upper pulley 44 is rotationally connected to the right upper end of the shell 1. The lower pulley 45 is rotationally connected to the right middle part of the shell 1. The upper pulley 44 and the lower pulley 45 are both drivingly connected with the double-groove pulley 43 through a belt. The hand wheel 46 is arranged at the right end of the upper pulley 44, which can quickly drive the needle 3 and the thread wheel to rotate. The detachable driving mechanism 4 further comprises a quick-release assembly 47. The quick-release assembly 47 comprises rolling grooves 475 and limiting balls 476. The rolling grooves 475 are all arranged in the middle of the interior of the mounting column 41. The limiting balls 476 are all slidingly connected to the interior of the rolling grooves 475. The inner wall of the double-groove pulley 43 is provided with uniformly distributed grooves. The rolling grooves 475 are vertically adjacent to the grooves. The outer surfaces of the limiting balls 476 on the same side are fitted and arranged with the inner walls of the grooves, which provide a basis for the fixation and release of the double-groove pulley 43. The quick-release assembly 47 further comprises a sliding groove 471, a limiting column 472, a mounting sheet 473, a tension spring 474 and a pull handle 477. The sliding groove 471 is arranged in the interior center of the mounting column 41. The limiting column 472 is slidingly connected to the interior of the sliding groove 471. The outer surface of the middle part of the limiting column 472 is fitted and arranged with the limiting ball 476. The right side of the limiting column 472 is a thick rod. The left side of the limiting column 472 is a thin rod. The mounting sheet 473 is arranged on the left side of the limiting column 472. The left side of the mounting sheet 473 and the inner wall of the sliding groove 471 are both provided with the tension spring 474. The pull handle 477 is arranged on the right side of the limiting column 472, which can quickly fix and release the double-groove pulley 43 and is convenient for the replacement of the belt. The detachable driving mechanism 4 further comprises a motor 48. The interior right lower end of the shell 1 is provided with an inner cavity 6. The motor 48 is arranged in the interior of the inner cavity 6. The input end of the motor 48 is electrically connected with the output end of the single-chip microcomputer 8. The output shaft right end of the motor 48 is fixedly connected with the left end of the mounting column 41, which provides stable driving for the sewing work.

[0026] The pressing mechanism 5 is arranged in the middle of the inner part of the end cover 2, and is matched and installed with the detachable driving mechanism 4. The pressing mechanism 5 comprises a mounting block 51, a mounting groove 52, a sliding block 53, a sliding hole 54, a sliding column 55, a pressing wheel 56 and a spring 57. The mounting block 51 is arranged in the middle of the front end of the end cover 2. The mounting groove 52 is arranged in the middle of the inner part of the mounting block 51. The sliding block 53 is slidingly connected to the inner part of the mounting groove 52. The sliding hole 54 is respectively arranged in the middle of the left and right sides of the sliding block 53. The sliding column 55 is slidingly connected to the inner part of the sliding hole 54. The pressing wheel 56 is arranged at the rear end of the sliding column 55. The outer edge of the pressing wheel 56 is matched and installed with the outer surface of the belt. The rear end of the sliding block 53 and the front end of the pressing wheel 56 are both provided with the spring 57. The spring 57 is sleeved on the outer surface of the sliding column 55. The spring 57 provides the basis for the pressing of the belt. The pressing mechanism 5 further comprises a lead screw 58 and a knob 59. The lead screw 58 is rotationally connected to the inner part of the mounting block 51. The outer surface of the rear side of the lead screw 58 is threadedly connected to the inner middle part of the sliding block 53. The knob 59 is arranged at the front end of the lead screw 58. The belt can be quickly pressed, so as to prevent the belt from loosening and falling off. The belt wheel can be quickly installed and detached. The belt can be replaced. The belt can be kept in a tight state at any time. The belt aging, falling off and damaging the machine body can be prevented.

[0027] The working principle of the high-speed double-line chain type sewing machine driving mechanism is as follows: when the high-speed double-line chain type sewing machine works, the single-chip microcomputer 8 controls the motor 48 to rotate, the output shaft of the motor 48 drives the mounting column 41 to rotate, the double-groove belt pulley 43 also rotates, the upper belt pulley 44 and the lower belt pulley 45 are driven to rotate by the belt, the needle 3 and the thread wheel are driven to rotate, and sewing work is performed; after long-time work, the belt is aged and loose, the belt needs to be replaced, the pull handle 477 is pulled to the right, the limiting column 472 moves to the right, the tension spring 474 is expanded under stress, and the thin rod of the limiting column 472 is vertically adjacent to the limiting ball 476; at this time, the side of the limiting ball 476 close to the thin rod of the limiting column 472 is not stressed, the double-groove belt pulley 43 is pulled to the right at this time, the frictional force generated extrudes the limiting ball 476, the two limiting balls 476 are displaced inward, and the limiting ball 476 is separated from the inside of the groove; at this time, the limiting effect of the double-groove belt pulley 43 disappears, the double-groove belt pulley 43 is quickly separated from the mounting column 41 and is removed, and then the belt can be conveniently and quickly replaced; after the new belt is replaced, the double-groove belt pulley 43 is aligned with the protrusion 42, then the double-groove belt pulley 43 is sleeved on the outer surface of the mounting column 41, the pull handle 477 is released, the tension spring 474 is not stressed and is contracted, and the limiting column 472 moves to the left and returns to the original position; at this time, the thick rod of the limiting column 472 presses the two limiting balls 476, the limiting balls 476 are moved outward under stress, and the limiting ball 476 far from the limiting column 472 enters the inside of the groove; at this time, the double-groove belt pulley 43 is fixed, the replacement of the belt is completed, after the sewing machine works for a period of time, the belt is loose, the knob 59 is rotated, and the screw rod 58 also rotates; because the outer surface of the rear side of the screw rod 58 is in threaded connection with the inside of the middle of the sliding block 53, with the rotation of the screw rod 58, the sliding block 53 moves backward, slowly presses the spring 57, and the spring 57 is slowly contracted; the elastic deformation of the spring 57 continuously presses the compression wheel 56, the outer edge of the compression wheel 56 is always close to the outer surface of the belt pulley, the belt is prevented from being loose, the sliding block 53 moves backward more, the compression effect of the compression wheel 56 on the belt is stronger, the belt pulley can be quickly installed and removed, the replacement of the belt is facilitated, the belt can be kept in a tight state at any time, and the sewing machine body is prevented from being damaged due to the aging and falling of the belt.

[0028] It is worth noting that the single-chip microcomputer 8 disclosed in the above embodiment is an S7-200 single-chip microcomputer, and the motor 48 is an HEM-34D0402-04 motor; the single-chip microcomputer 8 controls the motor 48 to work by using a method commonly used in the prior art.

[0029] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and equivalent structures or equivalent process transformations obtained by using the utility model specification and drawing contents, or direct or indirect application in other related technical fields are also included in the patent protection range of the utility model.

Claims

1. A high speed twin chain stitch sewing machine drive mechanism characterized by: It includes a shell (1), a detachable driving mechanism (4) and a pressing mechanism (5); The shell (1) is provided with an end cover (2) on the right side, a machine needle (3) is arranged on the left side of the shell (1), and a needle pitch dial (7) is arranged on the right side of the front end of the shell (1); The detachable driving mechanism (4) includes a mounting column (41), a protrusion (42), a double-groove belt pulley (43), an upper belt pulley (44), a lower belt pulley (45) and a hand wheel (46), the mounting column (41) is rotatably connected to the lower end of the left side wall of the end cover (2), the double-groove belt pulley (43) is sleeved on the outer surface of the mounting column (41) through the protrusion (42), the upper belt pulley (44) is rotatably connected to the right upper end of the shell (1), the lower belt pulley (45) is rotatably connected to the right middle part of the shell (1), the upper belt pulley (44) and the lower belt pulley (45) are both drivingly connected with the double-groove belt pulley (43) through a belt, and the hand wheel (46) is arranged on the right end of the upper belt pulley (44). The pressing mechanism (5) is arranged in the middle of the inside of the end cover (2) and is installed in cooperation with the detachable driving mechanism (4).

2. The high speed double thread chain stitch sewing machine drive mechanism according to claim 1, wherein: It also includes a single-chip microcomputer (8), which is arranged on the right upper end of the front end of the shell (1), and the input end of the single-chip microcomputer (8) is electrically connected with an external power supply.

3. The high speed double thread chain stitch sewing machine drive mechanism according to claim 1, wherein: The detachable driving mechanism (4) further includes a quick release assembly (47), the quick release assembly (47) includes rolling grooves (475) and limiting balls (476), the rolling grooves (475) are all arranged in the middle of the inside of the mounting column (41), the limiting balls (476) are all slidingly connected to the inside of the rolling grooves (475), the inner wall of the double-groove belt pulley (43) is provided with uniformly distributed grooves, the rolling grooves (475) are vertically adjacent to the grooves, and the outer surfaces of the limiting balls (476) on the same side are installed in cooperation with the inner walls of the grooves.

4. The high speed double thread chain stitch sewing machine drive mechanism according to claim 3, wherein: The quick release assembly (47) further includes a sliding groove (471), a limiting column (472), a mounting sheet (473), a tension spring (474) and a pull handle (477), the sliding groove (471) is arranged in the inside center of the mounting column (41), the limiting column (472) is slidingly connected to the inside of the sliding groove (471), the outer surface of the limiting column (472) is installed in cooperation with the limiting ball (476), the mounting sheet (473) is arranged on the left side of the limiting column (472), the left side of the mounting sheet (473) and the inner wall of the sliding groove (471) are both provided with the tension spring (474), and the pull handle (477) is arranged on the right side of the limiting column (472).

5. The high speed double thread chain stitch sewing machine drive mechanism according to claim 2, wherein: The detachable driving mechanism (4) further includes a motor (48), an inner cavity (6) is arranged in the right lower end of the inside of the shell (1), the motor (48) is arranged in the inside of the inner cavity (6), the input end of the motor (48) is electrically connected with the output end of the single-chip microcomputer (8), and the output shaft right end of the motor (48) is fixedly connected with the left end of the mounting column (41).

6. The high speed double thread chain stitch sewing machine drive mechanism according to claim 1, wherein: The pressing mechanism (5) comprises a mounting block (51), a mounting groove (52), a sliding block (53), a sliding hole (54), a sliding column (55), a pressing wheel (56) and a spring (57), the mounting block (51) is arranged in the middle of the front end of the end cover (2), the mounting groove (52) is arranged in the middle of the inside of the mounting block (51), the sliding block (53) is slidingly connected to the inside of the mounting groove (52), the sliding hole (54) is respectively arranged in the middle of the left and right sides of the sliding block (53), the sliding column (55) is slidingly connected to the inside of the sliding hole (54), the pressing wheel (56) is arranged at the rear end of the sliding column (55), the outer edge of the pressing wheel (56) is matched with the outer surface of the belt, the spring (57) is arranged between the rear end of the sliding block (53) and the front end of the pressing wheel (56), and the spring (57) is sleeved on the outer surface of the sliding column (55).

7. The high speed double thread chain stitch sewing machine drive mechanism according to claim 6, wherein: The pressing mechanism (5) further comprises a lead screw (58) and a knob (59), the lead screw (58) is rotationally connected to the inside of the mounting block (51), the outer surface of the rear side of the lead screw (58) is threadedly connected to the middle of the inside of the sliding block (53), and the knob (59) is arranged at the front end of the lead screw (58).

Images