阅读说明：本技术 缝纫机及刺料机构 (Sewing machine and needle bar mechanism ) 是由 徐龙姣 范国锋 于 2019-11-11 设计创作，主要内容包括：本发明公开了一种缝纫机以及刺料机构。刺料机构包括主轴和刺料组件,刺料组件包括固定于主轴上的刺料曲柄、第一端枢接于刺料曲柄的刺料连杆和枢接于刺料连杆的第二端的针杆组件；还包括平衡组件,平衡组件包括：固定于主轴的平衡曲柄,平衡曲柄与刺料曲柄分别设于主轴的两侧且共线设置；第一端枢接于平衡曲柄的平衡连杆；枢接于平衡连杆的第二端的平衡块,平衡块与针杆组件相对于主轴的运动方向相反。在主轴转动过程中,平衡曲柄、平衡连杆与平衡块的运动方向分别与刺料曲柄、刺料连杆、针杆组件的运动方向大体对称,平衡组件可平衡至少部分刺料组件运动产生的惯性力以及相对于主轴的惯性力矩,从而大幅降低刺料机构振动。(The invention discloses a sewing machine and a needling mechanism. The material pricking mechanism comprises a main shaft and a material pricking component, wherein the material pricking component comprises a material pricking crank fixed on the main shaft, a material pricking connecting rod with a first end pivoted to the material pricking crank, and a needle rod component pivoted to a second end of the material pricking connecting rod; still include balanced subassembly, balanced subassembly includes: the balance crank is fixed on the main shaft, and the balance crank and the thorn material crank are respectively arranged on two sides of the main shaft and are arranged in a collinear manner; the first end of the balance connecting rod is pivoted with the balance crank; and the balance weight is pivoted to the second end of the balance connecting rod and is opposite to the movement direction of the needle rod assembly relative to the main shaft. In the rotation process of the main shaft, the motion directions of the balance crank, the balance connecting rod and the balance block are respectively approximately symmetrical to the motion directions of the thorn material crank, the thorn material connecting rod and the needle rod assembly, and the balance assembly can balance at least part of inertia force generated by the motion of the thorn material assembly and the inertia moment relative to the main shaft, so that the vibration of the thorn material mechanism is greatly reduced.)

1. A material pricking mechanism comprises a main shaft (1) and a material pricking component, wherein the material pricking component comprises a material pricking crank (10) fixed on the main shaft (1), a material pricking connecting rod (4) with a first end pivoted to the material pricking crank (10), and a needle rod component (9) pivoted to a second end of the material pricking connecting rod (4); characterized in that, still include balanced subassembly, balanced subassembly includes:

the balance crank (11) is fixed on the main shaft (1), and the balance crank (11) and the material puncturing crank (10) are respectively arranged on two sides of the main shaft (1) and are arranged in a collinear manner;

a balance connecting rod (7) with a first end pivoted to the balance crank (11);

a balance weight (8) pivoted to a second end of the balance link (7), the balance weight (8) being opposite to the direction of movement of the needle bar assembly (9) relative to the main shaft (1).

2. The bur mechanism according to claim 1, characterized in that the balance crank (11) and the bur crank (10) are fixed to form an integrated crank (3), the main shaft (1) is fixedly connected with a connecting crank (2) which is identical to the integrated crank (3), the middle part of the connecting crank (2) is fixed to the main shaft (1), and the extension line of the main shaft (1) penetrates through the middle part of the integrated crank (3); the connecting crank (2) and the integrated crank (3) are fixedly connected through a first connecting rod (13) to form a U-shaped structure; the balance connecting rod (7) is pivoted on the first connecting rod (13), and the thorn material connecting rod (4) is pivoted on the integrated crank (3) through a second connecting rod (12) and is positioned outside the groove of the U-shaped structure.

3. The needle bar mechanism according to claim 1, wherein the balance block (8) is slidably connected in a balance slide way, the needle bar slider is slidably connected in a needle bar slide way, the center line of the needle bar slide way and the center line of the balance slide way are arranged in a collinear manner, and the straight line of the center line of the needle bar slide way intersects with the rotation center line of the main shaft (1).

4. The stripping mechanism according to claim 1, characterized in that the weight (8) has the same mass as the needle bar assembly (9).

5. The mechanism according to any of the claims 1 to 4, characterized in that the thorn crank (10) is identical to the balance crank (11) and the thorn connecting rod (4) is identical to the balance connecting rod (7); the material punching crank (10), the material punching connecting rod (4), the balance crank (11) and the balance connecting rod (7) form a centrosymmetric structure relative to the rotation center line of the main shaft (1).

6. A sewing machine comprising a needling mechanism, characterized in that the needling mechanism is as claimed in any one of claims 1 to 5.

Technical Field

The invention relates to the technical field of sewing equipment, in particular to a sewing machine and a needling mechanism.

Background

Most of the needling mechanisms of sewing machines adopt a crank-slider mechanism, as shown in fig. 1, in the rotation process of a main shaft, a needling component can generate unbalanced inertial force, the mechanism vibrates greatly, the unbalanced inertial force and the moment direction are irregular, a three-dimensional model of the needling mechanism is established, and ADAMS is used for vibration analysis to obtain a model shown in fig. 2. Based on the problems, most sewing machines have large vibration, large noise, short service life of parts and easy damage.

Therefore, how to provide a burling mechanism with small vibration is a technical problem which needs to be solved by the technical personnel in the field at present.

Disclosure of Invention

In view of the above, the present invention is directed to a burling mechanism with less vibration. Another object of the present invention is to provide a sewing machine including the above-mentioned loop bar mechanism, in which the loop bar mechanism is less vibrated.

In order to achieve the purpose, the invention provides the following technical scheme:

a material pricking mechanism comprises a main shaft and a material pricking component, wherein the material pricking component comprises a material pricking crank fixed on the main shaft, a material pricking connecting rod with a first end pivoted to the material pricking crank, and a needle rod component pivoted to a second end of the material pricking connecting rod; still include balanced subassembly, balanced subassembly includes:

the balance crank is fixed on the main shaft, and the balance crank and the thorn material crank are respectively arranged on two sides of the main shaft and are arranged in a collinear manner;

the first end of the balance connecting rod is pivoted with the balance crank;

a counterbalance pivotally connected to the second end of the counterbalance link, the counterbalance being opposite to the direction of movement of the needle bar assembly relative to the main shaft.

Preferably, the balance crank and the thorn crank are fixed to form an integrated crank, the main shaft is fixedly connected with a connecting crank which is identical to the integrated crank, the middle part of the connecting crank is fixed to the main shaft, and an extension line of the main shaft penetrates through the middle part of the integrated crank; the connecting crank and the integrated crank are fixedly connected through a first connecting rod to form a U-shaped structure; the balance connecting rod is pivoted on the first connecting rod, and the thorn material connecting rod is pivoted on the integrated crank through a second connecting rod and is positioned outside the groove of the U-shaped structure.

Preferably, the balance block is slidably connected in a balance slideway, the needle bar slider is slidably connected in a needle bar slideway, the central line of the needle bar slideway and the central line of the balance slideway are arranged in a collinear manner, and the straight line where the central line of the needle bar slideway is located intersects with the rotation central line of the main shaft.

Preferably, the weight has the same mass as that of the needle bar assembly.

Preferably, the thorn crank is identical to the balance crank, and the thorn connecting rod is identical to the balance connecting rod; the material punching crank, the material punching connecting rod, the balance crank and the balance connecting rod form a centrosymmetric structure relative to the rotation center line of the main shaft.

A sewing machine comprises a material pricking mechanism, wherein the material pricking mechanism is any one of the material pricking mechanisms.

The invention provides a material pricking mechanism which comprises a main shaft and a material pricking component, wherein the material pricking component comprises a material pricking crank fixed on the main shaft, a material pricking connecting rod with a first end pivoted to the material pricking crank, and a needle rod component pivoted to a second end of the material pricking connecting rod; still include balanced subassembly, balanced subassembly includes: the balance crank is fixed on the main shaft, and the balance crank and the thorn material crank are respectively arranged on two sides of the main shaft and are arranged in a collinear manner; the first end of the balance connecting rod is pivoted with the balance crank; and the balance weight is pivoted to the second end of the balance connecting rod and is opposite to the movement direction of the needle rod assembly relative to the main shaft.

In the rotation process of the main shaft, the motion directions of the balance crank, the balance connecting rod and the balance block are respectively approximately symmetrical to the motion directions of the thorn material crank, the thorn material connecting rod and the needle rod assembly, the balance assembly can balance at least part of inertia force generated by the motion of the thorn material assembly and the inertia moment relative to the main shaft, the motion stability of the thorn material mechanism can be improved, and therefore the vibration of the thorn material mechanism is greatly reduced.

The sewing machine comprising the material pricking mechanism provided by the invention has the advantage that the vibration of the material pricking mechanism is small.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of a prior art lancing mechanism;

FIG. 2 is an inertial force simulation result of vibration analysis of the lancing mechanism by using ADAMS in the prior art;

FIG. 3 is a first structural diagram of the present invention;

FIG. 4 is a second block diagram of the present invention;

FIG. 5 is a schematic view of the present invention;

fig. 6 is an inertial force simulation result of vibration analysis by the ADAMS in the pricking mechanism according to the present invention.

Reference numerals:

AB-thorn material crank, BC-thorn material connecting rod, CD-needle bar component;

1-main shaft, 2-connecting crank, 3-integrated crank, 4-thorn material connecting rod, 5-thorn material sliding block, 6-needle rod, 7-balance connecting rod, 8-balance block, 9-needle rod component, 10-thorn material crank, 11-balance crank, 12-second connecting rod and 13-first connecting rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide a burling mechanism with small vibration. Another core of the invention is to provide a sewing machine comprising the thorn material mechanism, and the thorn material mechanism has small vibration.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In an embodiment of the present invention, please refer to fig. 3 and 4, which include a main shaft 1, a thorn unit and a balance unit.

The needle bar assembly comprises a needle bar crank 10 fixed on the main shaft 1, a needle bar connecting rod 4 with a first end pivoted to the needle bar crank 10, and a needle bar assembly 9 pivoted to a second end of the needle bar connecting rod 4.

The balance assembly comprises a balance crank 11, a balance connecting rod 7 and a balance weight 8. The balance crank 11 is fixed on the main shaft 1, the balance crank 11 and the thorn material crank 10 are respectively arranged on two sides of the main shaft 1 and arranged in a collinear way, and then the motion directions of the balance crank 11 and the thorn material crank 10 are opposite. The first end of the balance connecting rod 7 is pivoted to the balance crank 11, the second end of the balance connecting rod is pivoted to the balance block 8, the balance crank 11, the balance connecting rod 7 and the balance block 8 are sequentially pivoted to form a connecting rod structure, the balance crank 11 drives the balance block 8 to move through the balance connecting rod 7, the movement directions of the balance block 8 and the needle rod assembly 9 relative to the main shaft 1 are opposite, namely, when the needle rod assembly 9 is close to the main shaft 1, the balance block 8 is far away from the main shaft 1; when the needle bar assembly 9 is far away from the main shaft 1, the balance weight 8 is close to the main shaft 1.

In the rotation process of the main shaft 1, the motion directions of the balance crank 11, the balance connecting rod 7 and the balance block 8 are respectively approximately symmetrical to the motion directions of the thorn material crank 10, the thorn material connecting rod 4 and the needle rod assembly 9, the balance assembly can balance the inertia force generated by at least part of the movement of the thorn material assembly and the inertia moment relative to the main shaft 1, the motion stability of the thorn material mechanism can be improved, and therefore the vibration of the thorn material mechanism is greatly reduced.

Further, the balance crank 11 and the stab crank 10 are fixed to form the integrated crank 3, alternatively, the balance crank and the stab crank may be integrally formed, or may be fixedly connected to form a rod by welding or the like. The main shaft 1 is fixedly connected with a connecting crank 2 which is identical to the integrated crank 3, the middle part of the connecting crank 2 is fixed on the main shaft 1, and the extension line of the main shaft 1 penetrates through the middle part of the integrated crank 3, so that the integrated crank 3 forms a balance crank 11 and a material-puncturing crank 10 on two sides of the extension line of the main shaft 1 respectively. The connecting crank 2 and the integrated crank 3 are fixedly connected through a first connecting rod 13 to form a U-shaped structure, the balance connecting rod 7 is pivoted on the first connecting rod 13, and the thorn connecting rod 4 is pivoted on the integrated crank 3 through a second connecting rod 12 and is positioned outside a groove of the U-shaped structure.

The integrated crank 3 is fixedly connected with the main shaft 1 through the first connecting rod 13 and the connecting crank 2. Through the arrangement of the U-shaped structure, the balance connecting rod 7 and the thorn material connecting rod 4 can be conveniently assembled. Meanwhile, the connecting crank 2 is set to be of the same structure as the integral crank 3 and the middle part of the connecting crank is used for fixing the main shaft 1, so that the unbalanced inertia force of the burling mechanism can be prevented from being increased due to the arrangement of the connecting crank 2.

Furthermore, the balance block 8 is connected in the balance slide way in a sliding mode, the needle rod 6 slide block is connected in the needle rod slide way in a sliding mode, the center line of the needle rod slide way and the center line of the balance slide way are arranged in a collinear mode, the straight line where the center line of the needle rod slide way is located is intersected with the rotating center line of the main shaft 1, the position relation between the balance block 8 and the needle rod assembly 9 is convenient to arrange, and the processing difficulty can be reduced.

Furthermore, the mass of the balance weight 8 is the same as that of the needle bar assembly 9, so that the stress symmetry of the needle bar connecting rod 4 and the balance connecting rod 7 can be improved, and the symmetry of the needle bar mechanism is improved.

The needle bar assembly 9 generally comprises a needle bar slider 5 pivotally connected to the needle bar linkage 4 and a needle bar 6 fixed to the needle bar slider 5.

Further, the stab crank 10 is identical to the balance crank 11, and the stab connecting rod 4 is identical to the balance connecting rod 7. The material punching crank 10, the material punching connecting rod 4, the balance crank 11 and the balance connecting rod 7 form a centrosymmetric structure relative to the rotation center line of the main shaft. Through forming the symmetrical structure, under the drive of the main shaft 1, the motion and the stress of the thorn material crank 10 and the balance crank 11 and the motion and the stress of the thorn material connecting rod 4 and the balance connecting rod 7 are completely symmetrical, so that the balance effect of the balance component on the needle rod component 9 can be further ensured.

The theory of operation of the thorn material mechanism that this embodiment provided:

specifically, as shown in fig. 5, a is the position of the spindle 1; AB1 is a thorn crank 10, AB2 is a balance crank 11; B1C1 is a thorn material connecting rod 4, B2C2 is a balance connecting rod 7; C1D1 is the needle bar assembly 9, and C2D2 is the weight 8.

During operation, the main shaft 1 drives the needle bar crank 10 to rotate, and the needle bar 6 is driven to move up and down through the needle bar connecting rod 4, so that the needle bar function is realized. Meanwhile, the balance component is driven by the main shaft 1 to rotate relatively on the other side of the thorn material crank 10. Because the quality and the arrangement mode of thorn material subassembly and balanced subassembly are the same completely, balanced subassembly and thorn material subassembly constitute symmetrical structure, as shown in fig. 6, because the unbalanced inertial force that needle bar 6 up-and-down motion brought can be balanced by balanced subassembly by a large margin to can reduce the unbalanced moment of inertia that thorn material subassembly motion arouses by a large margin, and then realize reducing the characteristics of thorn material mechanism vibration by a large margin.

In addition to the above-mentioned needle bar mechanism, the present invention also provides a sewing machine, which includes a needle bar mechanism, specifically, the needle bar mechanism provided in any of the above embodiments, and the beneficial effects can be referred to the above embodiments. The structure of other parts of the sewing machine is referred to the prior art, and the description is omitted.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The sewing machine and the needling mechanism provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.