CN211284823U - Quick thread trimming mechanism of sewing machine - Google Patents
Quick thread trimming mechanism of sewing machine Download PDFInfo
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- CN211284823U CN211284823U CN201821622503.2U CN201821622503U CN211284823U CN 211284823 U CN211284823 U CN 211284823U CN 201821622503 U CN201821622503 U CN 201821622503U CN 211284823 U CN211284823 U CN 211284823U
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- groove
- steel ball
- pull rod
- sleeve
- thread trimming
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Abstract
The utility model provides a quick thread trimming mechanism of sewing machine, including the driving shaft, be equipped with the thread trimming cam on the driving shaft, the terminal surface of thread trimming cam is equipped with the recess, the steel ball card is in dwang one end below, solenoid valve control pull rod one is connected in dwang middle part top, the steel ball is at the motion of thread trimming cam terminal surface, dwang other end top is equipped with vertical axle, vertical axle passes the bearing, vertical axle top is equipped with the connecting rod, two one ends of pull rod are connected to the connecting rod, two other ends of pull rod pass through anchor clamps and connect on the sleeve pipe, the sleeve pipe top is equipped with moves the sword, move. The driving shaft drives the thread trimming cam to rotate, and when the electromagnetic valve works, the pull rod drives the steel ball to slide on the thread trimming cam. Thereby the sleeve drives the movable knife to rotate. The thread is between the movable knife and the fixed knife. The movable knife can achieve the purpose of trimming when rotating clockwise.
Description
The technical field is as follows:
the utility model relates to a sewing machine technical field, concretely relates to quick thread trimming mechanism of sewing machine.
Background art:
the prior sewing machine is provided with an automatic thread trimming device, and although the prior thread trimming device of the sewing machine can achieve the purposes of time saving, energy saving and labor saving, the traditional structure is complex, the operation is complex, the disassembly and the assembly are inconvenient, and the prior thread trimming device is not suitable for being widely applied to a large number of sewing machines.
The utility model has the following contents:
the utility model aims to solve the technical problem that a sewing machine thread trimming mechanism with simple structure and reasonable design is provided.
The utility model discloses the technical problem that will solve adopts following technical scheme to realize:
the utility model provides a quick thread trimming mechanism of sewing machine which characterized in that: the automatic thread trimming device comprises a driving shaft, wherein a thread trimming cam is arranged on the driving shaft, a groove is formed in the end face of the thread trimming cam, a steel ball is clamped below one end of a rotating rod, a first electromagnetic valve is connected above the middle of the rotating rod, the steel ball moves on the end face of the thread trimming cam, the other end of the rotating rod controls a second pull rod through a transmission mechanism, the second pull rod is connected to a sleeve, a movable knife is arranged at the top end of the sleeve, the movable knife is in contact fit with a fixed knife of a needle plate assembly.
The driving shaft is provided with a first bevel gear, the driven shaft is inserted in the sleeve, the lower end of the driven shaft is provided with a second bevel gear, the first bevel gear is meshed with the second bevel gear, on one hand, the top end of the driven wheel can be provided with a wire shifting mechanism, and the driven wheel has two purposes of one shaft and on the other hand can be used for positioning and supporting the sleeve.
The outer wall of the driven shaft is provided with an annular groove, a first projection is arranged in the annular groove, a second projection is arranged on the inner wall of the sleeve, the projections are clamped in the annular groove, a spring is arranged in the annular groove, and two ends of the spring are connected to the first projection and the second projection respectively.
Utilize the spring to stretch out and draw back at two lugs, increase a little resistance, after the steel ball moved the recess at trimming cam terminal surface, the sleeve pipe was reverse suddenly, for it provides a little buffer power, avoids direct reverse rotation to bring impact to lead to mechanical damage for a long time.
The steel ball is embedded in the ball groove below one end of the rotating rod.
The groove comprises a first groove and a second groove, the first groove is connected with the second groove, the first groove is deeper than the second groove in depth, and the steel ball rotates clockwise through the driving shaft and passes through the first groove and the second groove.
The transition section of the end face of the groove and the end face of the trimming cam are in arc transition, and meanwhile, the transition section of the first groove and the transition section of the second groove are in arc transition. Smooth transition and avoiding abnormal sound caused by fall.
The groove bottom of the first groove is a slope surface, and the top of the slope is connected with the second groove.
The transmission mechanism comprises a bearing, a vertical shaft and a connecting rod, the vertical shaft is arranged above the other end of the rotating rod, the vertical shaft penetrates through the bearing, the top end of the vertical shaft is provided with the connecting rod, the connecting rod is connected with one end of the second pull rod, and the other end of the second pull rod is connected to the sleeve through a clamp.
The second pull rod is hinged to the clamp, and the upper sleeve and the lower sleeve of the clamp are provided with positioning clamps for positioning the clamp on the sleeves.
The bearing is fixed on the sewing machine body.
The working principle is as follows: the driving shaft drives the trimming cam to rotate clockwise, and when the electromagnetic valve works, the first pull rod drives the steel ball to slide on the trimming cam. Firstly, the steel ball suddenly falls down because the vertical shaft at the other end of the rotating rod is positioned by the bearing, so that the rotating rod moves to drive the vertical shaft to rotate anticlockwise and drive the connecting rod to swing anticlockwise so as to drive the pull rod II to push the sleeve to rotate anticlockwise and drive the movable knife to rotate anticlockwise, the movable knife is separated from the fixed knife, at the moment, the wire is arranged between the movable knife and the fixed knife, the driving shaft still rotates, the steel ball rises from the groove I to the groove II, the steel ball rises, the rotating rod swings clockwise around the vertical shaft, the vertical shaft rotates clockwise so as to control the connecting rod to swing clockwise, the pull rod II pulls the sleeve to rotate clockwise, the sleeve drives the movable knife to rotate clockwise, at the moment, the knife edge of the movable knife clamps the wire and moves to the fixed knife everywhere, the wire moves to a normal end face from the groove II, the steel ball rises again, and in the, the wire cutting device is in contact with the edge of the fixed cutter to achieve the purpose of wire cutting, when the wire cutting is not needed, the electromagnetic valve is closed, and the first pull rod pushes the steel ball to leave the end face of the wire cutting cam.
Compared with the prior art, the utility model beneficial effect lies in:
the driving shaft drives the thread trimming cam to rotate, and when the electromagnetic valve works, the pull rod drives the steel ball to slide on the thread trimming cam. Thereby the sleeve drives the movable knife to rotate. The thread is between the movable knife and the fixed knife. The movable knife achieves the purpose of trimming when rotating clockwise;
when the trimming is not needed, the electromagnetic valve is closed, and the first pull rod pushes the steel ball to leave the end face of the trimming cam;
firstly, the steel ball suddenly falls down after passing through a first groove, the first groove is deep, the movable knife is quickly driven to pull out anticlockwise, the thread is quickly placed between the fixed knife and the movable knife, the movable knife is clockwise pushed to move towards the direction of the fixed knife after passing through a second groove, then the movable knife rises to the end face, thread shearing is completed, the thread shearing is clockwise cut into 2 steps, and the thread shearing is slowly pushed in, so that the thread can be stabilized, the thread is prevented from shaking due to the fact that the thread is just anticlockwise moved, and the thread is pushed into a thread shearing area once;
the bottom of the first groove is a slope, the top of the slope is connected with the second groove, the first groove is stably pushed to ascend, and moving blades are prevented from shaking due to step-type ascending;
and the second groove rises step by step to the original end face, the bottom of the second groove is a plane, the moving knife does not move at the section, the wire is stabilized, and the sudden step rises to the original end face, namely the wire is cut rapidly.
Description of the drawings:
in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts;
fig. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a second schematic structural view of the present invention;
FIG. 3 is a schematic view of the movable knife, the needle plate assembly and the fixed knife of the present invention;
fig. 4 is a schematic structural view of the trimming cam of the present invention;
FIG. 5 is a schematic view of the connection between the driven shaft and the casing according to the present invention;
in the figure: 1-driving shaft; 2-trimming cam; 3-steel ball; 4-rotating the rod; 5-an electromagnetic valve; 6-a first pull rod; 7-a vertical axis; 8-a bearing; 9-a connecting rod; 10-a second pull rod; 11-a clamp; 12-a sleeve; 13-moving the knife; 14-a needle board assembly; 15-fixed cutting; 16-bevel gear one; 17-a driven shaft; 18-bevel gear two; 19-groove one; 20-groove two; 21-positioning the clamp; 22-bump one; 23-bump two; 24-a spring; 25-annular groove.
The specific implementation mode is as follows:
to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, connected through an intermediate medium, or connected to the inside of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1-4, a quick thread trimming mechanism of a sewing machine comprises a driving shaft 1, wherein a thread trimming cam 2 is arranged on the driving shaft, a groove is formed in the end face of the thread trimming cam, a steel ball 3 is clamped below one end of a rotating rod 4, a first pull rod 6 is connected above the middle of the rotating rod under the control of an electromagnetic valve 5, the steel ball moves on the end face of the thread trimming cam, a vertical shaft 7 is arranged above the other end of the rotating rod, the vertical shaft penetrates through a bearing 8, a connecting rod 9 is arranged at the top end of the vertical shaft and connected with one end of a second pull rod 10, the other end of the second pull rod is connected onto a sleeve 12 through a clamp 11, a.
The driving shaft is provided with a first bevel gear 16, the driven shaft 17 is inserted in the sleeve, the lower end of the driven shaft is provided with a second bevel gear 18, and the first bevel gear is meshed with the second bevel gear.
The steel ball is embedded in the ball groove below one end of the rotating rod.
The first groove is deeper than the second groove, and the steel ball rotates clockwise by the driving shaft to pass through the first groove and then pass through the second groove.
The end face transition section of the groove and the trimming cam is in arc transition, and meanwhile, the transition section of the first groove and the transition section of the second groove are in arc transition. Smooth transition, avoiding abnormal sound caused by fall
The second pull rod is hinged on the clamp, and the upper sleeve and the lower sleeve of the clamp are provided with positioning clamps 21 for positioning the clamp on the sleeves.
Fig. 5 the outer wall of the driven shaft 17 is provided with an annular groove 25, a first projection 22 is arranged in the annular groove, a second projection 23 is arranged on the inner wall of the sleeve, the projections are clamped in the annular groove, a spring 24 is arranged in the annular groove, and two ends of the spring are respectively connected to the first projection and the second projection.
Utilize the spring to stretch out and draw back at two lugs, increase a little resistance, after the steel ball moved the recess at trimming cam terminal surface, the sleeve pipe was reverse suddenly, for it provides a little buffer power, avoids direct reverse rotation to bring impact to lead to mechanical damage for a long time.
The working principle is as follows: the driving shaft drives the trimming cam to rotate clockwise, and when the electromagnetic valve works, the first pull rod drives the steel ball to slide on the trimming cam. Firstly, the steel ball suddenly falls down because the vertical shaft at the other end of the rotating rod is positioned by the bearing, so that the rotating rod moves to drive the vertical shaft to rotate anticlockwise and drive the connecting rod to swing anticlockwise so as to drive the pull rod II to push the sleeve to rotate anticlockwise and drive the movable knife to rotate anticlockwise, the movable knife is separated from the fixed knife, at the moment, the wire is arranged between the movable knife and the fixed knife, the driving shaft still rotates, the steel ball rises from the groove I to the groove II, the steel ball rises, the rotating rod swings clockwise around the vertical shaft, the vertical shaft rotates clockwise so as to control the connecting rod to swing clockwise, the pull rod II pulls the sleeve to rotate clockwise, the sleeve drives the movable knife to rotate clockwise, at the moment, the knife edge of the movable knife clamps the wire and moves to the fixed knife everywhere, the wire moves to a normal end face from the groove II, the steel ball rises again, and in the, the wire cutting device is in contact with the edge of the fixed cutter to achieve the purpose of wire cutting, when the wire cutting is not needed, the electromagnetic valve is closed, and the first pull rod pushes the steel ball to leave the end face of the wire cutting cam.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. The utility model provides a quick thread trimming mechanism of sewing machine which characterized in that: comprises a driving shaft, a trimming cam is arranged on the driving shaft, a groove is arranged on the end surface of the trimming cam, a steel ball is clamped below one end of a rotating rod, a first electromagnetic valve control pull rod is connected above the middle part of the rotating rod, the steel ball moves on the end surface of the trimming cam, a vertical shaft is arranged above the other end of the rotating rod, the vertical shaft passes through a bearing, a connecting rod is arranged at the top end of the vertical shaft, the connecting rod is connected with one end of a second pull rod, the other end of the second pull rod is connected on a sleeve through a clamp, a movable knife is arranged, the driving shaft is provided with a first bevel gear, the driven shaft is inserted in the sleeve, the lower end of the driven shaft is provided with a second bevel gear, the first bevel gear is meshed with the second bevel gear, the outer wall of the driven shaft is provided with an annular groove, a first projection is arranged in the annular groove, a second projection is arranged on the inner wall of the sleeve, the projection is clamped in the annular groove, a spring is arranged in the annular groove, and two ends of the spring are respectively connected to the first projection and the second projection;
the steel ball is embedded in a ball groove below one end of the rotating rod;
the first groove is deeper than the second groove, and the steel ball rotates clockwise by the driving shaft and passes through the first groove and then the second groove;
the transition section of the end surface of the groove and the trimming cam is in arc transition, and meanwhile, the transition section of the first groove and the transition section of the second groove are in arc transition;
the second pull rod is hinged to the clamp, and the upper sleeve and the lower sleeve of the clamp are provided with positioning clamps for positioning the clamp on the sleeves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821622503.2U CN211284823U (en) | 2018-09-30 | 2018-09-30 | Quick thread trimming mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821622503.2U CN211284823U (en) | 2018-09-30 | 2018-09-30 | Quick thread trimming mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211284823U true CN211284823U (en) | 2020-08-18 |
Family
ID=72014911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821622503.2U Active CN211284823U (en) | 2018-09-30 | 2018-09-30 | Quick thread trimming mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211284823U (en) |
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2018
- 2018-09-30 CN CN201821622503.2U patent/CN211284823U/en active Active
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