CN215561111U - Thread cutting device and sewing machine - Google Patents

Abstract

The utility model relates to the technical field of sewing machines, and particularly discloses a thread cutting device and a sewing machine. The lines to be cut can be placed in the threading holes, the slow-speed motor motors of the first mounting frame and the second mounting frame drive the first pressing roller bodies to rotate in opposite directions, the first pressing roller bodies are in contact with the second pressing roller bodies through the electric push rods, the lines can be tightened towards two sides by the two first pressing roller bodies with opposite rotation directions, the electric push rods and the slow-speed motor motors can be stopped immediately after the elastic switches are triggered, the lines are in a tightening state and are beneficial to being cut, the automation degree is high, and the situation that the lines are torn due to over tightening can be avoided.

Description

Thread cutting device and sewing machine

Technical Field

The utility model relates to the technical field of sewing machines, in particular to a thread cutting device and a sewing machine.

Background

The sewing machine can be used for sewing clothes, all fabrics which can be penetrated by a needle pillar of the sewing machine mainly need to be sewn, the sewing machine can be used for sewing, the existing sewing machine does not have a thread cutting function, an additional thread cutting device has the condition of incomplete thread cutting, most threads are not in a tightening state, and the thread drawing condition can be avoided when the threads in the tightening state are cut off, so that the thread cutting device and the sewing machine are provided.

The prior patent (publication number: CN213476301U) discloses a thread cutting device and a sewing machine, which comprises a base frame, a cutting table arranged on the base frame, a thread clamping mechanism comprising a driving component arranged on the base frame and at least one thread clamping component arranged on the driving component, wherein the cutting mechanism comprises a movable knife arranged on the cutting table, at least part of cutting surface of the movable knife extends towards the thread clamping component, and a fixed knife arranged on the thread clamping component, at least part of cutting surface of the movable knife extends towards the cutting table, and the fixed knife and the movable knife are arranged in a staggered mode.

In the process of implementing the utility model, the inventor finds that at least the following problems in the prior art are not solved; according to the device, the pressing strip devices are arranged at the two ends of the line to limit and fix the line, but the cutting part of the line still has loose parts, so that the quality of the tangent line cannot be guaranteed during tangent.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a thread cutting device and a sewing machine, which solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a thread cutting device and a sewing machine comprise a sewing machine frame, wherein a threading hole is formed in the inner wall of the sewing machine frame, an electric push rod is fixedly installed on the left side wall of the sewing machine frame, an installation plate is fixedly installed on the end face of the electric push rod, a first installation frame and a second installation frame are fixedly installed on the two sides of the surface of the installation plate, a first press roller body is rotatably installed on the inner walls of the first installation frame and the second installation frame, a driven belt pulley is coaxially embedded and installed at the top of the first press roller body, a slow motor is fixedly installed on the tops of the first installation frame and the second installation frame, a driving belt pulley is fixedly installed on a motor shaft of the slow motor, a pneumatic push rod is fixedly installed on the surface of the installation plate, a cutter is fixedly installed on the side wall of the pneumatic push rod, a spring frame, an elastic switch and a cylinder are fixedly installed on the right side wall of the sewing machine frame, a cutting table is fixedly installed on the left side of the cylinder, a support frame is fixedly installed on the left side of the spring frame, the inner wall of the support frame is rotatably provided with a second pressing roller body.

In a preferred embodiment of the present invention, the first press roller body and the second press roller body are located on the same horizontal line.

As a preferred embodiment of the present invention, the cutting knife is located on the same horizontal line as the cutting table.

As a preferred embodiment of the utility model, the spring force switch is located inside the spring holder.

In a preferred embodiment of the present invention, the driving pulley is connected to the driven pulley by a belt.

Compared with the prior art, the utility model has the following beneficial effects:

1. the lines to be cut can be placed in the threading holes, the slow-speed motor motors of the first mounting frame and the second mounting frame drive the first pressing roller bodies to rotate in opposite directions, the first pressing roller bodies are in contact with the second pressing roller bodies through the electric push rods, the lines can be tightened towards two sides by the two first pressing roller bodies with opposite rotation directions, the electric push rods and the slow-speed motor motors can be stopped immediately after the elastic switches are triggered, the lines are in a tightening state and are beneficial to being cut, the automation degree is high, and the situation that the lines are torn due to over tightening can be avoided.

2. The pneumatic push rod controls the cutter to move once, the line in a tightened state can be cut off quickly after the cutter is contacted with the cutting table, the response speed and the reset speed of the pneumatic push rod are high, the line cutting efficiency can be ensured, the cutting speed is high, and the situation of wire drawing of the line can be avoided.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a top view of a thread cutting apparatus and sewing machine of the present invention;

FIG. 2 is a front view of a thread cutting apparatus and a first mount of a sewing machine according to the present invention.

In the figure: 1. an electric push rod; 2. mounting a plate; 3. a sewing machine frame; 4. a first mounting bracket; 5. a first pressing roller body; 6. threading holes; 7. a second pressing roller body; 8. a support frame; 9. a spring holder; 10. an elastic switch; 11. a cutter; 12. cutting table; 13. a cylinder; 14. a pneumatic push rod; 15. a second mounting bracket; 16. a slow motor; 17. a drive pulley; 18. a driven pulley.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-2, the present invention provides a technical solution: a thread cutting device and a sewing machine comprise a sewing machine frame 3, wherein the inner wall of the sewing machine frame 3 is provided with a thread hole 6, the left side wall of the sewing machine frame 3 is fixedly provided with an electric push rod 1, the end surface of the electric push rod 1 is fixedly provided with an installation plate 2, the two sides of the surface of the installation plate 2 are both fixedly provided with a first installation frame 4 and a second installation frame 15, the inner walls of the first installation frame 4 and the second installation frame 15 are both rotatably provided with a first press roller body 5, the top of the first press roller body 5 is coaxially embedded with a driven belt pulley 18, the top of the first installation frame 4 and the top of the second installation frame 15 are both fixedly provided with a slow motor 16, the motor shaft of the slow motor 16 is fixedly provided with a driving belt pulley 17, the surface of the installation plate 2 is fixedly provided with a pneumatic push rod 14, the side wall of the pneumatic push rod 14 is fixedly provided with a cutter 11, the right side wall of the sewing machine frame 3 is fixedly provided with a spring frame 9, an elastic switch 10 and a cylinder 13, cutting bed 12 is fixedly installed on the left side of cylinder 13, and spring frame 9 left side fixed mounting has support frame 8, and support frame 8 inner wall rotates installs second and presses roll body 7.

In this embodiment, as shown in fig. 1 and fig. 2, the lines to be cut can be placed through the threading holes 6, the slow motor motors 16 of the first mounting rack 4 and the second mounting rack 15 drive the first pressing roller 5 to rotate in opposite directions, the first pressing roller 5 is contacted with the second pressing roller 7 through the electric push rod 1, the two first pressing rollers 5 with opposite rotation can tighten the lines to both sides, the electric push rod 1 and the slow motor 16 can be immediately stopped after the elastic switch 10 is triggered, the lines are in a tightened state and are favorable for being cut, the pneumatic push rod 14 controls the cutter 11 to move once, the lines in a tightened state can be quickly cut after the cutter 11 is contacted with the cutting table 12, the response speed and the reset speed of the pneumatic push rod 14 are both fast, the cutting efficiency can be ensured, the high cutting speed can avoid the situation of wire drawing, the elastic switch 10 is triggered to stop the slow motor 16 in time, the situation that the lines are too tight to cause tearing can be avoided.

In this embodiment, the first pressing roller body 5 and the second pressing roller body 7 are located on the same horizontal line, so that the first pressing roller body 5 can be fully contacted with the second pressing roller body 7.

In this embodiment, the cutter 11 and the cutting table 12 are located on the same horizontal line, and the lines in the tight state can be cut off rapidly after the cutter 11 contacts the cutting table 12.

In this embodiment, the elastic switch 10 is located inside the spring holder 9, and the spring holder 9 compresses and triggers the elastic switch 10, so that the electric push rod 1 and the slow motor 16 stop running immediately.

In this embodiment, the driving pulley 17 is connected to the driven pulley 18 through a belt, and the slow motor motors 16 of the first and second mounting frames 4 and 15 can drive the first roller pressing body 5 to rotate through a belt transmission mechanism.

The working principle is as follows: when the thread cutting device and the sewing machine are used, lines needing to be cut off can be placed in the thread holes 6, the electric push rod 1 is controlled to push the mounting plate 2 to move rightwards, the slow speed motor motors 16 of the first mounting frame 4 and the second mounting frame 15 can drive the first pressing roller bodies 5 to rotate through the belt transmission mechanism, the rotating directions of the first pressing roller bodies 5 of the first mounting frame 4 and the second mounting frame 15 are opposite, the lines can be tightened towards two sides when the first pressing roller bodies 5 with two opposite rotating directions are in contact with the second pressing roller bodies 7, the electric push rod 1 pushes the support frame 8 to move rightwards, the spring frame 9 compresses and triggers the elastic switch 10, the electric push rod 1 and the slow speed motor motors 16 stop running immediately, then the pneumatic push rod 14 is controlled to push the cutter 11 to move once, the cutter 11 can rapidly cut off the lines in a tightened state after being in contact with the cutting table 12, the cutter 11 then self-resets with the pneumatic ram 14.

While there have been shown and described what are at present considered the fundamental principles and essential features of the utility model and its advantages, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (5)

1. A thread cutting device and a sewing machine, comprising a sewing machine frame (3), characterized in that: the inner wall of the sewing machine frame (3) is provided with a threading hole (6), the left side wall of the sewing machine frame (3) is fixedly provided with an electric push rod (1), the end face of the electric push rod (1) is fixedly provided with a mounting plate (2), the two sides of the surface of the mounting plate (2) are fixedly provided with a first mounting frame (4) and a second mounting frame (15), the inner walls of the first mounting frame (4) and the second mounting frame (15) are rotatably provided with a first press roller body (5), the top of the first press roller body (5) is coaxially embedded with a driven pulley (18), the tops of the first mounting frame (4) and the second mounting frame (15) are fixedly provided with a slow motor (16), the motor shaft of the slow motor (16) is fixedly provided with a driving pulley (17), and the surface of the mounting plate (2) is fixedly provided with a pneumatic push rod (14), pneumatic push rod (14) lateral wall fixed mounting has cutter (11), sewing machine frame (3) right side wall fixed mounting has spring frame (9), elasticity switch (10) and cylinder (13), cylinder (13) left side fixed mounting has cutting bed (12), spring frame (9) left side fixed mounting has support frame (8), support frame (8) inner wall rotates and installs the second and presses roll body (7).

2. A thread cutting device and sewing machine according to claim 1, characterized in that: the first pressing roller body (5) and the second pressing roller body (7) are located on the same horizontal line.

3. A thread cutting device and sewing machine according to claim 1, characterized in that: the cutting knife (11) and the cutting table (12) are positioned on the same horizontal line.

4. A thread cutting device and sewing machine according to claim 1, characterized in that: the elastic switch (10) is positioned inside the spring frame (9).

5. A thread cutting device and sewing machine according to claim 1, characterized in that: the driving belt pulley (17) is connected with the driven belt pulley (18) through a belt.

Images