Needle bar assembly

Abstract

The utility model relates to the field of sewing machines, in particular to a needle bar assembly which comprises a rocker, a connecting rod, a holder, a needle bar and a sleeve, the rocker is used for being rotationally connected to a machine shell, an axis A is formed between the rocker and the machine shell, the connecting rod is rotationally connected to the rocker, and an axis B is formed between the connecting rod and the rocker, and the holder is rotationally connected to the connecting rod; an axis C, an axis A, an axis B and an axis C between the holder and the connecting rod are all located on the same side of the needle rod, the axis A, the axis B and the axis C are parallel to one another and are not coplanar, the needle rod is fixedly connected to the holder, the needle rod is sleeved with the sleeve in a sliding mode, and the sleeve is used for being fixedly connected to a machine shell. The axis A, the axis B and the axis C are all located on the same side of the needle bar, so that the rocker can have a large swing (reciprocating rotation) angle, the needle bar can have a large reciprocating stroke, the reciprocating stroke of the needle bar is controlled by controlling the swing angle of the rocker, and the needle bar is suitable for cloth of different thicknesses.

Description

Technical Field

[0001] This application relates to the field of sewing machines, and particularly to a needle bar assembly. Background Art

[0002] The needle bar assembly of a sewing machine is a key component for driving the sewing needle to move up and down in the sewing machine.

[0003] The needle bar assembly converts the rotational motion of the power assembly into the reciprocating linear motion of the needle bar, thereby driving the sewing needle to puncture the fabric up and down to complete the sewing process.

[0004] The design and structure of the needle bar assembly have an important impact on the performance and sewing effect of the sewing machine. For example, by adjusting the height and motion trajectory of the needle bar, it can adapt to different thicknesses of fabrics and requirements of sewing stitches. Utility Model Content

[0005] In order to adapt to different thicknesses of fabrics, this application provides a needle bar assembly.

[0006] The needle bar assembly provided by this application adopts the following technical solutions:

[0007] A needle bar assembly includes a rocker, a connecting rod, a cage, a needle bar, and a sleeve.

[0008] The rocker is used for rotatably connecting to the machine housing, and there is an axis A between the rocker and the machine housing.

[0009] The connecting rod is rotatably connected to the rocker, and there is an axis B between the connecting rod and the rocker.

[0010] The cage is rotatably connected to the connecting rod, and there is an axis C between the cage and the connecting rod.

[0011] Axis A, axis B, and axis C are all located on the same side of the needle bar, and axis A, axis B, and axis C are parallel to each other and non-coplanar.

[0012] The needle bar is fixedly connected to the cage.

[0013] The sleeve is slidably sleeved outside the needle bar, and the sleeve is used for fixedly connecting to the machine housing.

[0014] By adopting the above technical solutions, axis A, axis B, and axis C are all located on the same side of the needle bar, so that the rocker can have a larger swing (reciprocating rotation) angle, and then the needle bar can have a larger reciprocating stroke, realizing controlling the reciprocating stroke of the needle bar by controlling the swing angle of the rocker to adapt to different thicknesses of fabrics.

[0015] Preferably, the cage is provided with a fixing hole and a through hole.

[0016] The axis of the fixing hole coincides with axis C.

[0017] The axis of the through hole is perpendicular to axis C, and the through hole communicates with the fixing hole.

[0018] By adopting the above technical solution, a cooling medium can be injected into the through hole to cool and / or lubricate the rotating connection between the cage and the connecting rod, thereby improving stability and service life.

[0019] Preferably, the through hole penetrates the cage in a direction away from axis B.

[0020] By adopting the above technical solution, it is convenient to inject a cooling medium into the through hole.

[0021] Preferably, the rocker is provided with a connection hole and a through groove.

[0022] The axis of the connection hole coincides with axis B.

[0023] The axis of the through groove is perpendicular to axis B, and the through groove communicates with the connection hole.

[0024] By adopting the above technical solution, a cooling medium can be injected into the through groove to cool and / or lubricate the rotating connection between the connecting rod and the rocker, thereby improving stability and service life.

[0025] Preferably, the through groove penetrates the rocker in a direction away from axis C.

[0026] By adopting the above technical solution, it is convenient to inject a cooling medium into the through groove.

[0027] Preferably, the needle bar is used for connecting a sewing needle.

[0028] Along the needle insertion direction, axis C is located behind axis B.

[0029] By adopting the above technical solution, during the needle insertion process, the rotating connection between the connecting rod and the rocker is the driving part, and the rotating connection between the cage and the connecting rod is the driven part; the driving part is located in the front and drives the driven part by pulling, which is beneficial to improving the stability of needle insertion.

[0030] Preferably, the needle bar is used for connecting a sewing needle.

[0031] Along the needle insertion direction, the connection between the cage and the needle bar is located behind axis B.

[0032] By adopting the above technical solution, during the needle insertion process, the rotating connection between the connecting rod and the rocker is the driving part, and the connection between the cage and the needle bar is the driven part; the driving part is located in the front and drives the driven part by pulling, which is beneficial to improving the stability of needle insertion.

[0033] Preferably, along the axial direction of the needle rod, the connection between the retaining frame and the needle rod is located on one side of the axis C.

[0034] By adopting the above technical solution, the force of the connecting rod on the retaining frame is orthogonally decomposed into parallel force and vertical force. The parallel force is parallel to the axial direction of the needle bar, and the vertical force is perpendicular to the axial direction of the needle bar.

[0035] The parallel force is transmitted to the needle bar through the retainer, driving the needle bar to move axially.

[0036] The vertical force transmitted to the needle bar is reduced by the bending deformation of the retaining frame, the deformation of the needle bar is reduced, and the stability of the reciprocating movement of the needle bar is improved.

[0037] Preferably, the needle bar is used for connection with a sewing needle.

[0038] Along the needle insertion direction, the connection between the retaining frame and the needle rod is located in front of the axis C.

[0039] Preferably, the surface O coincides with the axis of the needle rod, and the surface O is perpendicular to the axis C.

[0040] The connecting rods are symmetrically arranged with respect to the plane O.

[0041] By adopting the above technical solution, the connecting rod is symmetrically arranged with respect to the plane O, so that the needle bar is evenly stressed, the needle bar is prevented from deviating from the plane O, and the stability of the reciprocating movement of the needle bar is improved.

[0042] In summary, the present application includes at least one of the following beneficial technical effects:

[0043] 1. Axis A, axis B and axis C are all located on the same side of the needle bar, so that the rocker can have a larger swing (reciprocating) angle, and the needle bar can have a larger reciprocating stroke, so that the reciprocating stroke of the needle bar can be controlled by controlling the swing angle of the rocker to adapt to fabrics of different thicknesses;

[0044] 2. The driving part is located in the front, and the driven part is driven by pulling, which is conducive to improving the stability of needle insertion;

[0045] 3. The vertical force transmitted to the needle bar is reduced by bending the retainer, thereby reducing the deformation of the needle bar and improving the stability of the reciprocating movement of the needle bar;

[0046] 4. The needle bar is evenly stressed to avoid needle bar deviation and improve the stability of the needle bar's reciprocating movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a schematic diagram of the needle bar assembly.

[0048] Figure 2 It is a schematic diagram of the needle bar assembly and housing.

[0049] Figure 3 It is a schematic diagram of a cage and a needle bar.

[0050] Explanation of reference numerals: 1, rocker; 11, fixed connection hole; 12, connection hole; 13, through groove; 2, connecting rod; 3, cage; 31, mounting hole; 32, fixing hole; 33, through hole; 4, needle bar; 5, sleeve. Specific embodiments

[0051] The present application will be further described in detail below with reference to the accompanying drawings.

[0052] Refer to Figure 1 and Figure 2 An embodiment of the present application discloses a needle bar assembly, including a rocker 1, a connecting rod 2, a cage 3, a needle bar 4, and a sleeve 5.

[0053] One end of the rocker 1 is used for rotatably connecting to the machine housing, and there is an axis A between the rocker 1 and the machine housing. One end of the connecting rod 2 is rotatably connected to the other end of the rocker 1, and there is an axis B between the connecting rod 2 and the rocker 1. One end of the cage 3 is rotatably connected to the other end of the connecting rod 2, and there is an axis C between the cage 3 and the connecting rod 2.

[0054] The needle bar 4 is fixedly connected to the other end of the cage 3. The sleeve 5 is slidably sleeved outside the needle bar 4, and the sleeve 5 is used for fixedly connecting to the machine housing.

[0055] The axis A, the axis B, and the axis C are all located on the same side of the needle bar 4, and the axis A, the axis B, and the axis C are parallel to each other and non-coplanar.

[0056] The rocker 1 is provided with a fixed connection hole 11, a connection hole 12, and a through groove 13. The fixed connection hole 11 and the connection hole 12 are respectively located at both ends of the rocker 1.

[0057] The axis of the fixed connection hole 11 coincides with the axis A. The fixed connection hole 11 is used for connecting to the machine shaft of the sewing machine power assembly, so that the rocker 1 reciprocally rotates around the axis A with the machine shaft.

[0058] The axis of the connection hole 12 coincides with the axis B. The axis of the through groove 13 is perpendicular to the axis B, and the through groove 13 communicates with the connection hole 12. In this embodiment: the axis A and the axis B coincide with the plane AB, and the axis of the through groove 13 is perpendicular to the plane AB.

[0059] The connecting rod 2 is provided with two pin holes, and the two pin holes are located at both ends of the connecting rod 2. One pin hole and the connection hole 12 are used for a pin shaft to be coaxially rotatably inserted therein to realize that one end of the connecting rod 2 is rotatably connected to the other end of the rocker 1.

[0060] Refer to Figure 1 and Figure 3, the cage 3 is provided with a mounting hole 31, a fixing hole 32 and a through hole 33. The mounting hole 31 is located at the other end of the cage 3. The needle bar 4 is coaxially embedded in the mounting hole 31 to fix the needle bar 4 to the other end of the cage 3.

[0061] The fixing hole 32 is located at one end of the cage 3, and the axis of the fixing hole 32 coincides with the axis C.

[0062] Another pin hole, the fixing hole 32 is used for another pin shaft to be coaxially and rotatably embedded, so that one end of the cage 3 is rotatably connected to the other end of the connecting rod 2.

[0063] The axis of the through hole 33 is perpendicular to the axis C, and the through hole 33 communicates with the fixing hole 32. The axis of the through hole 33 and the axis of the mounting hole 31 coincide with the plane O. In this embodiment: the axis of the through hole 33 is parallel to the axis of the mounting hole 31, and the connecting rod 2 is symmetrically arranged with respect to the plane O.

[0064] The needle bar 4 is used for connecting the sewing needle. In the drawings, the needle bar 4 moves downward along its own axis to achieve needle insertion, and the sewing needle penetrates into the fabric.

[0065] Along the needle insertion direction: the axis C is located behind the axis B; the connection part between the cage 3 and the needle bar 4 is located between the axis B and the axis C.

[0066] At the same time, in this embodiment: the through groove 13 penetrates through the rocker 1 in a direction away from the axis C; the through hole 33 penetrates through the cage 3 in a direction away from the axis B.

[0067] When the rocker 1 rotates to the plane AB being perpendicular to the needle bar 4: the rocker 1 does not contact the needle bar 4; the connecting rod 2 does not contact the needle bar 4.

[0068] The implementation principle of a needle bar assembly in an embodiment of the present application is as follows: the rocker 1 and the connecting rod 2 are completely located on the same side of the needle bar 4, so that the rocker 1 can have a larger swing (reciprocating rotation) angle, and then the needle bar 4 can have a larger reciprocating stroke, realizing the control of the reciprocating stroke of the needle bar 4 by controlling the swing angle of the rocker 1 to adapt to fabrics of different thicknesses.

[0069] The above are all the preferred embodiments of the present application. Without restricting the protection scope of the present application based on this, therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A needle bar assembly, characterized in that, It includes a rocker (1), a connecting rod (2), a cage (3), a needle bar (4) and a sleeve (5). The rocker (1) is used for rotatably connecting to the machine housing, and the axis A between the rocker (1) and the machine housing The connecting rod (2) is rotatably connected to the rocker (1), and the axis B between the connecting rod (2) and the rocker (1) The cage (3) is rotatably connected to the connecting rod (2), and the axis C between the cage (3) and the connecting rod (2) Axis A, axis B, and axis C are all on the same side of the needle bar (4), and axis A, axis B, and axis C are parallel to each other and non-coplanar The needle bar (4) is fixedly connected to the cage (3). The sleeve (5) is slidably sleeved outside the needle bar (4), and the sleeve (5) is used for fixedly connecting to the machine housing.

2. The anchor rod assembly according to claim 1, characterized in that, The cage (3) is provided with a fixing hole (32) and a through hole (33). The axis of the fixing hole (32) coincides with axis C. The axis of the through hole (33) is perpendicular to axis C, and the through hole (33) communicates with the fixing hole (32).

3. The anchor rod assembly according to claim 2, wherein The through hole (33) penetrates through the cage (3) in the direction away from axis B.

4. The anchor rod assembly according to claim 1, characterized in that, The rocker (1) is provided with a connecting hole (12) and a through slot (13). The axis of the connecting hole (12) coincides with axis B. The axis of the through slot (13) is perpendicular to axis B, and the through slot (13) communicates with the connecting hole (12).

5. The anchor rod assembly according to claim 4, characterized in that, The through slot (13) penetrates through the rocker (1) in the direction away from axis C.

6. The anchor rod assembly according to claim 1, characterized in that, The needle bar (4) is used for connecting a sewing needle. Along the needle insertion direction, axis C is behind axis B.

7. The anchor rod assembly according to claim 1, wherein, The needle bar (4) is used for connecting a sewing needle. Along the needle insertion direction, the connection part of the cage (3) and the needle bar (4) is behind axis B.

8. The anchor rod assembly according to claim 1, wherein, Axially along the needle bar (4), the connection part of the cage (3) and the needle bar (4) is on one side of axis C.

9. The anchor rod assembly according to claim 8, characterized in that, The needle bar (4) is used for connecting a sewing needle. Along the needle insertion direction, the connection part of the cage (3) and the needle bar (4) is in front of axis C.

10. The anchor rod assembly according to claim 1, wherein, Plane O coincides with the axis of the needle bar (4), and plane O is perpendicular to axis C. The connecting rod (2) is symmetrically arranged with respect to plane O.

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