CN210657477U

CN210657477U - Pattern machine

Info

Publication number: CN210657477U
Application number: CN201921598165.8U
Authority: CN
Inventors: 张标
Original assignee: Ningbo Chinki Sewing Machine Technology Co ltd
Current assignee: Ningbo Chinki Sewing Machine Technology Co ltd
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-06-02
Anticipated expiration: 2029-09-24

Abstract

An upper shaft is installed in an upper machine shell, a lower shaft is installed in a lower machine shell, the rear end of the lower shaft is connected with the rear end of the upper shaft through a transmission mechanism, a first eccentric shaft sleeve is installed at the front end of the lower shaft, a second eccentric shaft sleeve is installed at the rear end of the lower shaft, the first eccentric shaft sleeve is installed in a front installation hole of the lower shaft, the second eccentric shaft sleeve is installed in a rear installation hole of the lower shaft, the front end of a switching shaft is installed in a front installation hole of the switching shaft, the rear end of the switching shaft is installed in a rear installation hole of the switching shaft, the middle part of the switching shaft is eccentrically arranged relative to the front end part of the switching shaft and the rear end part of the switching shaft, an upper synchronizing wheel is installed at the rear end of the upper shaft, a lower synchronizing wheel is installed in the middle part of the switching shaft, a synchronizing belt is installed between the upper synchronizing wheel and the lower synchronizing wheel. The pattern sewing machine can solve the problem that the lower machine shell cannot be shared due to the fact that the distance between the center of the shuttle hook and the needle plate is larger than the distance between the center of the rotating shuttle and the needle plate, and achieves universality of the machine shell.

Description

Pattern machine

Technical Field

The utility model relates to a sewing machine especially relates to a pattern sewing machine.

Background

The rotating shuttle is an important component of a sewing machine, and among sewing machines, sewing machines sewing with lock stitches are most common. Most of these machines employ a rotating shuttle which hooks the loop with its tip, expands the loop and guides the thread loop around the bobbin to form a lock stitch.

The operating principle of the rotating shuttle is that after the needle rises for a certain distance, the shuttle point of the rotating shuttle race starts to hook the thread loop, the shuttle point hooks the thread loop and then continues to rotate, when the thread loop is sent to the guide rail opening of the rotating shuttle frame, the thread loop is hooked by the thread dividing hook of the shuttle frame, and at this time, the needle should rise for about 2 mm from the lower limit position. When the thread loop is close to the rotating shuttle frame, the thread loop end is moved to the back of the guide rail, the angle between the thread loop hook and the needle moving axis is about 50 deg, the thread loop is hooked by 45 deg on the outer frame convex surface of the shuttle spindle of the shuttle bed, and the thread loop is rotated continuously, the end of the thread loop is hooked on the thread loop hook, so that the thread loop slides smoothly onto the surface of the shuttle frame, the thread end of the thread loop is pulled outwards by the bevel edge of the tail of the thread guiding plate, and the rear part of the thread loop is hooked by the thread loop hook of the shuttle frame and slides downwards to the bottom of the shuttle frame, at the moment, the needle exits from the rotating shuttle mechanism. The principle of the rotating shuttle for forming stitches is basically the same as that of the swinging shuttle, but the process and the method for forming the stitches are different from those of the swinging shuttle: the rotating shuttle does rotating motion at equal angular speed, and the swinging shuttle does reciprocating motion at unequal speed; in the one-time up-and-down reciprocating motion of the needle (the main shaft rotates for one circle), the rotating shuttle rotates for two circles at the equal angular speed, and the shuttle wiggles for one time; the rotating shuttle is fixed by a rotating shuttle frame, a rotating shuttle bed rotates, and the rotating shuttle bed hooks a thread loop by a shuttle bed tip, and threads are distributed by the rotating shuttle frame hook, so that the rotating shuttle bypasses a shuttle peg sleeve and the bottom and the upper edge of the shuttle frame, and the threads are separated from the head of the rotating shuttle plate to form the thread loop.

In addition, the distance between the shuttle tip of the shuttle and the needle plate of the rotating shuttle is a fixed value, and the size of the shuttle is larger than that of the rotating shuttle, so that the distance between the center of the shuttle and the needle plate is larger than that between the center of the rotating shuttle and the needle plate, correspondingly, the tooth pitch corresponding to the shuttle is larger, and the tooth pitch corresponding to the rotating shuttle is smaller, so that different mounting hole positions need to be arranged on a machine shell in order to be matched with the smooth mounting of the rotating shuttle and the shuttle, and the rotating shuttle and the shuttle cannot share the machine shell.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned prior art current situation, provide a simple structure, can realize the style machine of rotating shuttle and shuttle sharing casing.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this style machine, including lower casing and the upper casing of installation on the lower casing, install the upper shaft in the upper casing, the front end of upper shaft is connected with the needle bar, and the rear end of upper shaft links to each other with the driving source, install the lower shaft in the lower casing, the front end of lower shaft is connected with the rotating shuttle subassembly, and the rear end of lower shaft passes through drive mechanism and links to each other its characterized in that with the rear end of upper shaft: the transmission mechanism comprises an upper synchronizing wheel, a lower synchronizing wheel, a synchronous belt, a first gear, a second gear and a transfer shaft, wherein a lower shaft front mounting hole, a lower shaft rear mounting hole, a transfer shaft front mounting hole and a transfer shaft rear mounting hole are formed in the lower casing, a first eccentric shaft sleeve is mounted at the front end of the lower shaft, a second eccentric shaft sleeve is mounted at the rear end of the lower shaft, the first eccentric shaft sleeve is mounted in the lower shaft front mounting hole, the second eccentric shaft sleeve is mounted in the lower shaft rear mounting hole, the front end part of the transfer shaft is mounted in the transfer shaft front mounting hole, the rear end part of the transfer shaft is mounted in the transfer shaft rear mounting hole, the middle part of the transfer shaft is eccentrically arranged relative to the front end part of the transfer shaft and the rear end part of the transfer shaft, the upper synchronizing wheel is mounted at the rear end of the upper shaft, the lower synchronizing wheel is mounted in the middle part of the transfer shaft, and the synchronous belt is mounted between the upper synchronizing, the first gear is arranged in the middle of the transfer shaft, the second gear is arranged at the rear end of the lower shaft, and the second gear is meshed with the first gear.

Preferably, the first gear is located at a rear side of the lower synchronizing wheel.

Preferably, the upper shaft, the lower shaft and the transfer shaft are all horizontally arranged.

In order to enable the synchronous belt to be capable of smoothly transmitting, a tension wheel supporting block is arranged in the upper shell, a tension wheel is arranged on the tension wheel supporting block, and the tension wheel is pressed on the outer side of the synchronous belt.

Preferably, as for any of the above schemes, a needle plate is installed at the front neck of the lower casing, the needle plate is located above the rotating shuttle assembly, a moving blade assembly is installed between the needle plate and the rotating shuttle assembly, and the moving blade assembly is connected to the upper shaft through a connecting rod assembly and can synchronously move along with the upper shaft. Therefore, the upper shaft drives the needle rod, the cutter assembly and the rotating shuttle assembly to act synchronously when rotating, thereby realizing sewing action.

Compared with the prior art, the utility model has the advantages of: according to the pattern sewing machine, the first eccentric shaft sleeve is installed at the front end of the lower shaft, the second eccentric shaft sleeve is installed at the rear end of the lower shaft, the middle of the transfer shaft is eccentrically arranged relative to the front end part of the transfer shaft and the rear end part of the transfer shaft, the problem that a lower machine shell cannot be shared due to the fact that the distance between the center of the shuttle and the needle plate is larger than the distance between the center of the rotating shuttle and the needle plate can be solved, namely, the same lower machine shell can be used for installing the shuttle and the rotating shuttle, and the universality of the machine shell is achieved.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural view of the embodiment of the present invention with the upper housing removed;

fig. 3 is a schematic structural diagram of a lower housing according to an embodiment of the present invention;

FIG. 4 is a schematic view of the structure of FIG. 3 from another angle;

FIG. 5 is a schematic structural view of the embodiment of the present invention with the upper and lower housings removed;

FIG. 6 is a schematic view of the structure of FIG. 5 at another angle;

fig. 7 is a schematic view of an eccentric structure of the lower shaft and the transfer shaft according to the embodiment of the present invention;

fig. 8 is a schematic structural diagram of a transfer shaft according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 2, the pattern sewing machine of the present embodiment includes a lower housing 2 and an upper housing 1 mounted on the lower housing, with the direction of arrow a in fig. 2 being the forward direction. An upper shaft 3 is installed in the upper casing 1, the upper shaft 3 is horizontally arranged, the front end of the upper shaft 3 is connected with a needle rod 4, the rear end of the upper shaft 3 is connected with a driving source 5, and the driving source 5 is a motor.

A lower shaft 6 is arranged in the lower shell 2, the lower shaft 6 is horizontally arranged, the front end of the lower shaft 6 is connected with a rotating shuttle component 7, and the rear end of the lower shaft 6 is connected with the rear end of the upper shaft 3 through a transmission mechanism 8. A needle plate 13 is arranged at the front neck part 25 of the lower shell 2, the needle plate 13 is positioned above the rotating shuttle assembly 7, a moving knife assembly 14 is arranged between the needle plate 13 and the rotating shuttle assembly 7, and the moving knife assembly 14 is connected to the upper shaft 3 through a connecting rod assembly 15. The lower shell 2 is also provided with a material pressing mechanism 16 for pressing the cloth to be processed on the needle plate 13.

When the sewing machine works, the upper shaft 3 rotates to drive the needle rod 4 to move up and down under the driving of the motor, the upper shaft 3 drives the movable cutter assembly 14 to synchronously act through the connecting rod assembly 15, meanwhile, the upper shaft 3 drives the lower shaft 6 to synchronously rotate through the transmission mechanism 8, and the lower shaft 6 rotates to drive the rotating shuttle assembly 7 to synchronously act, so that the sewing action is realized.

As shown in fig. 3 to 8, the transmission mechanism 8 of the present embodiment includes an upper synchronizing wheel 81, a lower synchronizing wheel 82, a timing belt 83, a first gear 84, a second gear 85, and an adapter shaft 86. The lower housing 2 is provided with a lower shaft front mounting hole 21, a lower shaft rear mounting hole 22, an adapter shaft front mounting hole 23 and an adapter shaft rear mounting hole 24. The front end of the lower shaft 6 is provided with a first eccentric bushing 9, the rear end of the lower shaft 6 is provided with a second eccentric bushing 10, the first eccentric bushing 9 is arranged in the lower shaft front mounting hole 21, and the second eccentric bushing 10 is arranged in the lower shaft rear mounting hole 22. The adapter shaft 86 is horizontally disposed, the front end 861 of the adapter shaft is mounted in the front mounting hole 23 of the adapter shaft, the rear end 862 of the adapter shaft is mounted in the rear mounting hole 24 of the adapter shaft, and the middle 863 of the adapter shaft is eccentrically disposed with respect to the front end 861 and the rear end 862 of the adapter shaft. The upper synchronizing wheel 81 is installed at the rear end of the upper shaft 3, the lower synchronizing wheel 82 is installed at the middle part 863 of the transfer shaft, the synchronous belt 83 is installed between the upper synchronizing wheel 81 and the lower synchronizing wheel 82, in addition, in order to press the synchronous belt 83, a tension wheel supporting block 11 is installed inside the upper machine shell 1, a tension wheel 12 is installed on the tension wheel supporting block 11, and the tension wheel 12 is pressed on the outer side of the synchronous belt 83. The first gear 84 and the second gear 85 are both straight gears, the first gear 84 is installed in the middle 863 of the transfer shaft and located at the rear side of the lower synchronizing gear 82, the second gear 85 is installed at the rear end of the lower shaft 6, and the second gear 85 is meshed with the first gear 84.

The lower case 2 adopted in this embodiment is a lower case matched with the shuttle mechanism, because the distance from the center of the shuttle to the needle plate is greater than the distance from the center of the shuttle to the needle plate, the pitch corresponding to the shuttle is larger, and the pitch corresponding to the shuttle is smaller, if the shuttle mechanism is directly installed on the lower case, the situation that the installation hole site on the lower case cannot be aligned with the lower shaft and the adapter shaft of the shuttle mechanism occurs, so that the shuttle mechanism cannot be installed smoothly, therefore, in this embodiment, the first eccentric shaft sleeve 9 is installed at the front end of the lower shaft 6, the second eccentric shaft sleeve 10 is installed at the rear end of the lower shaft 6, the middle part 863 of the adapter shaft is eccentrically arranged relative to the front end 861 and the rear end 862 of the adapter shaft, so that the shuttle and the shuttle can share the case.

Claims

1. The utility model provides a pattern sewing machine, includes lower casing (2) and upper casing (1) of installation on the lower casing, install upper shaft (3) in upper casing (1), the front end of upper shaft (3) is connected with needle bar (4), and the rear end of upper shaft (3) links to each other with driving source (5), install lower shaft (6) in lower casing (2), the front end of lower shaft (6) is connected with and revolves shuttle subassembly (7), and the rear end of lower shaft passes through drive mechanism (8) and links to each other its characterized in that with the rear end of upper shaft (3): the transmission mechanism (8) comprises an upper synchronizing wheel (81), a lower synchronizing wheel (82), a synchronous belt (83), a first gear (84), a second gear (85) and a transfer shaft (86), a lower shaft front mounting hole (21), a lower shaft rear mounting hole (22), a transfer shaft front mounting hole (23) and a transfer shaft rear mounting hole (24) are formed in a lower case (2), a first eccentric shaft sleeve (9) is installed at the front end of a lower shaft (6), a second eccentric shaft sleeve (10) is installed at the rear end of the lower shaft (6), the first eccentric shaft sleeve (9) is installed in the lower shaft front mounting hole (21), the second eccentric shaft sleeve (10) is installed in the lower shaft rear mounting hole (22), a transfer shaft front end (861) is installed in the transfer shaft front mounting hole (23), and a transfer shaft rear end (862) is installed in the transfer shaft rear mounting hole (24), the connecting shaft middle part (863) is eccentrically arranged relative to the connecting shaft front end part (861) and the connecting shaft rear end part (862), the upper synchronizing wheel (81) is installed at the rear end of the upper shaft (3), the lower synchronizing wheel (82) is installed at the connecting shaft middle part (863), the synchronous belt (83) is installed between the upper synchronizing wheel (81) and the lower synchronizing wheel (82), the first gear (84) is installed at the connecting shaft middle part (863), the second gear (85) is installed at the rear end of the lower shaft (6), and the second gear (85) is meshed with the first gear (84).

2. The pattern machine of claim 1, wherein: the first gear (84) is located on a rear side of the lower synchronizing wheel (82).

3. The pattern machine of claim 1, wherein: the upper shaft (3), the lower shaft (6) and the transfer shaft (86) are all horizontally arranged.

4. The pattern machine of claim 1, wherein: a tension pulley supporting block (11) is installed inside the upper shell (1), a tension pulley (12) is installed on the tension pulley supporting block (11), and the tension pulley (12) is pressed on the outer side of the synchronous belt (83).

5. Pattern machine according to any of claims 1 to 4, characterized in that: a needle plate (13) is installed at the front neck part of the lower shell (2), the needle plate (13) is located above the rotating shuttle assembly (7), a moving blade assembly (14) is installed between the needle plate (13) and the rotating shuttle assembly (7), and the moving blade assembly (14) is connected to the upper shaft (3) through a connecting rod assembly (15) and can synchronously move along with the upper shaft (3).