Multi-needle machine

Abstract

The utility model provides a multi-needle machine, and belongs to the technical field of sewing machines. The multi-needle machine solves the problem that in the prior art, a multi-needle machine is poor in working stability and reliability. The multi-needle machine comprises a base, a cutter seat arranged on the base and fixedly connected with a sliding block and a movable cutter frame arranged on the cutter seat and fixedly connected with a sliding rail, the sliding rail can be connected to the sliding block in a front-back sliding mode, the cutter seat and the base are arranged in an up-down abutting mode, the base is provided with a supporting groove which is formed in a downwards-concave mode, and the supporting groove is arranged in the supporting groove. The sliding rail is arranged in the supporting groove, moving spaces are formed between the two sides of the sliding rail and the two side walls of the supporting groove respectively, and the bottom face of the sliding rail abuts against the bottom wall of the supporting groove in an up-down mode. The multi-needle machine has the advantage that the working stability and reliability of the existing multi-needle machine can be ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machines and relates to a multi-needle machine. Background Art

[0002] Multi-needle sewing machines, also known as multi-needle sewing machines, are widely used in decorative sewing. Multi-needle sewing machines with auxiliary devices can achieve functions such as pleating, knitting, and elastic wrinkling.

[0003] For example, a Chinese patent document discloses a driving mechanism of an automatic thread trimming device for a multi-needle machine (application number: 201220525539.5), which includes a housing base, a cutter frame, a left cylinder, a right cylinder, a left drive crank, and a right drive crank; the left cylinder body and the right cylinder body are respectively fixed to the left and right sides of the housing base, the piston rod of the left cylinder is connected to one side of the cutter frame through the left drive crank, and the piston rod of the right cylinder is connected to the other side of the cutter frame through the right drive crank. The top of the housing base has four fixed seats, which are located at the four corners of a rectangle; the cutter frame is movably arranged between the left and right rows of fixed seats.

[0004] The driving mechanism of the automatic thread trimming device of the multi-needle machine has the following deficiencies during use: the multi-needle machine will vibrate during operation, and the cutter frame, left drive crank and right drive crank of the driving mechanism of the automatic thread trimming device of the multi-needle machine are all suspended on the base of the casing. When the left cylinder body and the right cylinder body respectively drive the cutter frame to move forward and backward relative to the base of the casing through the left drive crank and the right drive crank, there is an instability problem, which causes the actual movement trajectory of the cutter frame to deviate from the predetermined trajectory, thereby making the reliability of the moving knife on the cutter frame moving forward to hook the bottom line and the moving knife moving backward and the fixed knife cutting the line poor. Summary of the invention

[0005] The purpose of the utility model is to solve the above problems in the existing technology and propose a multi-needle machine. The technical problem to be solved by the utility model is to solve the problem that the existing multi-needle machine has poor working stability and reliability.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A multi-needle machine comprises a base, a cutter seat arranged on the base and fixedly connected to a slider, and a movable knife holder arranged on the cutter seat and fixedly connected to a slide rail, wherein the slide rail is connected to the slide rail in a manner that can slide back and forth. The invention is characterized in that the cutter seat and the base are arranged to be in contact with each other up and down, the base has a supporting groove that is recessed downward, the slide rail is arranged in the supporting groove, and there is a movable space between the two sides of the slide rail and the two side walls of the supporting groove respectively, and the bottom surface of the slide rail is arranged to be in contact with the bottom wall of the supporting groove up and down.

[0008] Different from the prior art, the base of the multi-needle machine can support the cutter seat, the supporting groove on the base can form a gap, the setting of the movable space can facilitate the forward and backward sliding of the slide rail, and the bottom wall of the supporting groove can support the slide rail fixed on the moving knife holder. At the same time, the sliding block fixed on the cutter seat and the slide rail fixed on the moving knife holder can form mutual limitations in the upper and lower directions to avoid the shaking of the cutter seat during operation, and also to avoid the shaking of the moving knife holder during movement, so that the fixed knife arranged on the cutter seat and the moving knife arranged on the moving knife holder can work more stably and reliably, so that the actual movement trajectory of the cutter holder is consistent with the predetermined trajectory, thereby solving the problem of poor working stability and reliability of the existing multi-needle machine.

[0009] In the above-mentioned multi-needle machine, a sliding groove is provided on the cutting knife seat along the front-to-back direction, the moving knife holder is provided in the sliding groove, the two ends of the moving knife holder are respectively fixedly connected with the sliding rails, one end of the moving knife holder is connected to one of the sliding rails in sequence up and down, the other end of the moving knife holder is fixedly connected to a supporting plate, and the other sliding rail is connected to the supporting plate in sequence up and down. By providing the sliding groove on the cutting knife seat, the groove wall of the sliding groove can further limit the moving knife holder in the front-to-back and up-to-down directions, further avoiding the shaking of the cutting knife seat during operation, and at the same time, by connecting one end of the moving knife holder to the top of one of the sliding rails, and connecting the other end of the moving knife holder to the bottom of the other sliding rail through the supporting plate, the moving knife holder and the two sliding rails can form mutual limitation in the up-to-down direction, so as to further make the actual motion trajectory of the cutting knife holder consistent with the predetermined trajectory, thereby better solving the problem of poor working stability and reliability of the existing multi-needle machine.

[0010] In the above-mentioned multi-needle machine, the slide rail includes a slide rail body and a connecting block fixedly connected to the end of the slide rail body away from the movable tool holder, wherein the bottom surface of one slide rail body is arranged to abut against the bottom wall of the support groove, and the bottom surface of the slide rail connecting block is lower than the bottom wall of the support groove; the bottom surface of the other slide rail connecting block is arranged to abut against the bottom wall of the support groove. Since one end of the moving knife holder is connected to the top of one of the slide rails, and the other end of the moving knife holder is connected to the bottom of the other slide rail through a supporting plate, in order to ensure the horizontal setting of the moving knife holder and avoid single-end tilting of the moving knife holder, there is a difference in the depth of the two supporting grooves. In order to enable the bottom wall of the supporting groove to better support the slide rail, a connecting block is arranged on the slide rail body so that the bottom surface of the slide rail body of one of the slide rails is abutted against the bottom wall of the supporting groove up and down, and at the same time, the bottom surface of the slide rail connecting block is lower than the bottom wall of the supporting groove, so that a movement limit in the front and rear direction of the slide rail can be formed between the connecting block and the notch edge of the supporting groove, and the bottom surface of the other slide rail connecting block is abutted against the bottom wall of the supporting groove up and down, thereby ensuring the horizontal setting of the moving knife holder, and further making the actual movement trajectory of the cutting knife holder consistent with the predetermined trajectory, thereby better solving the problem of poor working stability and reliability of the existing multi-needle machine.

[0011] In the above-mentioned multi-needle machine, the bottom surface of the slide rail, the bottom wall of the support groove and the bottom surface of the connecting block are all planes. The above-mentioned structure makes the contact area between the slide rail, the connecting block and the bottom wall of the support groove as large as possible, so that the bottom wall of the support groove can better support the slide rail.

[0012] In the above-mentioned multi-needle machine, the base has a plurality of support parts, which are distributed at least at the four corners of the cutter seat, and the cutter seat and the support parts are arranged to abut against each other up and down. By providing a plurality of support parts distributed at least at the four corners of the cutter seat, the base can form multi-point support for the cutter seat, and at the same time, the distribution of support points is more reasonable, thereby better preventing the cutter seat from shaking during operation.

[0013] In the above-mentioned multi-needle machine, the bottom surface of the cutter seat and the top of the support part are both planes. The above-mentioned structure makes the contact area between the cutter seat and the support part as large as possible, so that the support part can better support the cutter seat.

[0014] In the above-mentioned multi-needle machine, a linkage assembly for driving the two slide rails to move synchronously is also provided on the base, and the linkage assembly is hinged to the connecting blocks of the two slide rails at the same time. By setting the matching structure of the linkage assembly and the slide rail slider, the forces at both ends of the movable knife holder are balanced and both ends of the movable knife holder always move relative to the cutter seat at the same speed. In addition, compared with the traditional way that the slide rail remains stationary while the slider moves, the slider of the multi-needle machine always remains stationary during use, and the linkage assembly drives the two slide rails to move synchronously relative to the slide, so that the possibility of the slider being damaged is greatly reduced, and the slide rail has a much greater load-bearing capacity than the slider, which can increase the service life and stability of the multi-needle machine. In addition, the slide rail is in the shape of a long strip, which can better connect the movable knife holder and the linkage assembly, thereby ensuring the stability of the movable knife holder and the accuracy of movement, so that the actual movement trajectory of the cutter holder is consistent with the predetermined trajectory, thereby solving the problem of poor working stability and reliability of the existing multi-needle machine.

[0015] Compared with the prior art, the advantages of the multi-needle machine are: the base of the multi-needle machine can form multi-point support for the cutter seat, and the bottom wall of the supporting groove on the base can also form support for the slide rail fixed on the moving knife holder. At the same time, the sliding block fixed on the cutter seat and the slide rail fixed on the moving knife holder can form mutual limitation in the up and down directions to avoid the shaking of the cutter seat during operation, and also avoid the shaking of the moving knife holder during movement, so that the fixed knife arranged on the cutter seat and the moving knife arranged on the moving knife holder can work more stably and reliably, and the actual motion trajectory of the cutter holder is consistent with the predetermined trajectory, thereby solving the problem of poor working stability and reliability of the existing multi-needle machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of this multi-needle machine.

[0017] Figure 2 It is a partial three-dimensional structural schematic diagram of the multi-needle machine base, cutter seat, slide rail and movable knife holder.

[0018] Figure 3 It is a top view structural diagram of the multi-needle machine base, cutter seat, slide rail, movable knife holder and linkage components.

[0019] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle.

[0020] Figure 5 yes Figure 3 Cross-sectional view at the middle BB.

[0021] Figure 6 It is a three-dimensional structural diagram of the base, movable knife holder, slide rail and linkage components of the multi-needle machine.

[0022] Figure 7 This is an exploded view of the multi-needle machine base, movable knife holder, slide rail and linkage assembly.

[0023] Figure 8 It is a partial structural schematic diagram of the multi-needle machine base viewed from above.

[0024] Fig. 9 This is an exploded view of the cutting knife seat and moving knife holder of this multi-needle machine.

[0025] In the figure, 1, base; 1a, supporting groove; 1b, supporting part; 2, cutting knife seat; 2a, sliding groove; 3, moving knife holder; 4, sliding block; 5, sliding rail; 5a, sliding rail body; 5b, connecting block; 6, movable space; 7, supporting plate; 8, linkage assembly; 8a, fixing frame; 8b, rotating shaft; 8c, driving block; 8d, linkage pull rod; 8e, driving connecting rod; 8f, linkage block. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0027] A multi-needle machine, referring to Figure 1-9, including a base 1, a cutter seat 2 arranged on the base 1 and fixedly connected to a slider 4, and a movable knife holder 3 arranged on the cutter seat 2 and fixedly connected to a slide rail 5, the slide rail 5 is connected to the slide rail 4 in a forward and backward sliding manner, the cutter seat 2 and the base 1 are arranged to be in contact with each other up and down, the base 1 has a supporting groove 1a which is recessed downward, the slide rail 5 is arranged in the supporting groove 1a, and there are movable spaces 6 between the two sides of the slide rail 5 and the two side walls of the supporting groove 1a, and the bottom surface of the slide rail 5 is arranged to be in contact with the bottom wall of the supporting groove 1a up and down.

[0028] Specifically, refer to Figure 1-9 The two ends of the movable tool holder 3 are respectively fixedly connected with the slide rails 5, and the slide rails 5 include a slide rail body 5a and a connecting block 5b fixedly connected to the end of the slide rail body 5a away from the movable tool holder 3, wherein the bottom surface of the slide rail body 5a of one of the slide rails 5 is arranged to abut against the bottom wall of the supporting groove 1a, and the bottom surface of the connecting block 5b of the slide rail 5 is lower than the bottom wall of the supporting groove 1a; the bottom surface of the connecting block 5b of the other slide rail 5 is arranged to abut against the bottom wall of the supporting groove 1a; a sliding groove 2a is arranged on the cutting knife seat 2 along the front-to-back direction, and the movable tool holder 3 is arranged in the sliding groove 2a, one end of the movable tool holder 3 is connected to one of the slide rails 5 in sequence up and down, and the other end of the movable tool holder 3 is fixedly connected to a supporting plate 7, and the other slide rail 5 is connected to the supporting plate 7 in sequence up and down.

[0029] In this embodiment, preferably, the bottom surface of the slide rail 5, the bottom wall of the support groove 1a and the bottom surface of the connecting block 5b are all flat surfaces.

[0030] More specifically, refer to Figure 1-9 The base 1 has a plurality of supporting portions 1b, which are distributed at least at four corners of the cutter seat 2, and the cutter seat 2 and the supporting portions 1b are disposed vertically against each other.

[0031] In this embodiment, preferably, the bottom surface of the cutter seat 2 and the top of the support portion 1b are both flat surfaces.

[0032] More specifically, refer to Figure 1-9, the base 1 is also provided with a linkage assembly 8 for driving the two slide rails 5 to move synchronously, and the linkage assembly 8 is hinged with the connecting blocks 5b of the two slide rails 5 at the same time. The linkage assembly 8 includes a fixed frame 8a, on which a pair of rotating shafts 8b are rotatably provided, and the two rotating shafts 8b are respectively hingedly connected to the connecting blocks 5b of the corresponding slide rails 5 through linkage blocks 8f, one of the rotating shafts 8b is fixedly connected with a driving block 8c, and the two rotating shafts 8b are connected through a linkage rod 8d. The linkage assembly 8 also includes a driving connecting rod 8e, and the driving connecting rod 8e is connected to the driving block 8c. When in use, the driving connecting rod 8e is used to connect the power source, and the power source pulls the driving block 8c connected thereto through the driving connecting rod 8e, and because of the action of the linkage rod 8d, the synchronous rotation of the two rotating shafts 8b is realized, and the two rotating shafts 8b respectively drive the corresponding slide rails 5 to move through the two linkage blocks 8f, thereby realizing the synchronous movement of the two slide rails 5.

[0033] In addition, in addition to the above-mentioned structure, the linkage assembly 8 can also adopt a ball screw structure (not shown in the figure). Specifically, the ball screw structure includes a screw and a screw nut. The screw is arranged between the two slide rails 5 and along the length direction of the slide rails 5. The two sides of the screw nut are respectively connected to the two slide rails 5.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0035] Although the terms such as base 1, support slot 1a, support portion 1b, cutter seat 2, sliding slot 2a are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A multi-needle machine, comprising a base (1), a cutter seat (2) arranged on the base (1) and fixedly connected to a slider (4), and a movable knife holder (3) arranged on the cutter seat (2) and fixedly connected to a slide rail (5), wherein the slide rail (5) is connected to the slider (4) in a manner that it can slide back and forth, and is characterized in that: The cutter seat (2) and the base (1) are arranged to abut against each other up and down, the base (1) has a support groove (1a) which is recessed downward, the slide rail (5) is arranged in the support groove (1a), and there are movable spaces (6) between the two sides of the slide rail (5) and the two side walls of the support groove (1a), and the bottom surface of the slide rail (5) is arranged to abut against the bottom wall of the support groove (1a) up and down.

2. A multi-needle machine according to claim 1, characterized in that: The cutter seat (2) is provided with a sliding groove (2a) along the front-back direction, the movable knife holder (3) is arranged in the sliding groove (2a), the two ends of the movable knife holder (3) are respectively fixedly connected with the sliding rails (5), one end of the movable knife holder (3) is connected to one of the sliding rails (5) in sequence up and down, the other end of the movable knife holder (3) is fixedly connected to a supporting plate (7), and the other sliding rail (5) is connected to the supporting plate (7) in sequence up and down.

3. A multi-needle machine according to claim 2, characterized in that: The slide rail (5) comprises a slide rail body (5a) and a connecting block (5b) fixedly connected to the end of the slide rail body (5a) away from the movable tool holder (3), wherein the bottom surface of the slide rail body (5a) of one slide rail (5) is arranged to abut against the bottom wall of the supporting groove (1a) up and down, and the bottom surface of the connecting block (5b) of the slide rail (5) is lower than the bottom wall of the supporting groove (1a); the bottom surface of the connecting block (5b) of the other slide rail (5) is arranged to abut against the bottom wall of the supporting groove (1a) up and down.

4. A multi-needle machine according to claim 3, characterized in that: The bottom surface of the slide rail (5), the bottom wall of the support groove (1a) and the bottom surface of the connecting block (5b) are all planes.

5. A multi-needle machine according to claim 1 or 2 or 3 or 4, characterized in that: The base (1) has a plurality of support parts (1b), the plurality of support parts (1b) are distributed at least at four corners of the cutter seat (2), and the cutter seat (2) and the support parts (1b) are arranged to abut against each other up and down.

6. A multi-needle machine according to claim 5, characterized in that: The bottom surface of the cutter seat (2) and the top of the support portion (1b) are both flat surfaces.

7. A multi-needle machine according to claim 2, 3 or 4, characterized in that: The base (1) is also provided with a linkage assembly (8) for driving the two slide rails (5) to move synchronously, and the linkage assembly (8) is simultaneously hinged to the connecting blocks (5b) of the two slide rails (5).

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