Embroidery machine needle bar separating mechanism

Abstract

The utility model discloses an embroidery machine needle bar separating mechanism which comprises a needle bar arranged in a needle bar frame, a cam driving mechanism arranged in a machine shell, a needle bar shifting block connected with the cam driving mechanism and a separating mechanism body, the separating mechanism body comprises a motor, a connecting rod mechanism and a shifting rod, and the motor is in linkage with the shifting rod through the connecting rod mechanism. The needle rod shifting block is V-shaped and is movably connected with the cam driving mechanism, and the shifting rod is matched with the needle rod shifting block; a similar F-shaped connecting block is arranged at the top of the needle rod, and the needle rod shifting block is matched with the connecting block. The connecting rod mechanism is driven by the motor, so that the poke rod can timely separate the needle rod poke block from the similar F-shaped connecting block at the top of the needle rod, the cam driving mechanism is prevented from continuously driving the needle rod to work in a sudden state, and the embroidery quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of embroidery machines, in particular to a needle bar disengagement mechanism of an embroidery machine. Background Art

[0002] Generally, when an embroidery machine is working, the cam drive mechanism drives the needle bar to embroider up and down. The cam drive mechanism and the needle bar are always in a linkage state. Once an emergency occurs, the cam drive mechanism cannot stop the needle bar immediately, so the needle bar continues to embroider up and down by inertia, causing problems with the embroidery. Therefore, it is necessary to study a disengagement mechanism that can disengage the needle bar of the embroidery machine in time. Utility Model Content

[0003] The utility model discloses a needle bar disengagement mechanism for an embroidery machine, which can stop the needle bar in time when the embroidery machine is working. The specific technical scheme is as follows:

[0004] A needle bar disengagement mechanism for an embroidery machine comprises a needle bar arranged in a needle bar frame, a cam drive mechanism arranged in a machine casing, and a needle bar toggle block connected to the cam drive mechanism. The disengagement mechanism also comprises a motor, a connecting rod mechanism, and a toggle rod, wherein the motor is linked to the toggle rod through the connecting rod mechanism; the needle bar toggle block is V-shaped and is movably connected to the cam drive mechanism, and the toggle rod cooperates with the needle bar toggle block; a connecting block similar to an F-shaped connecting block is arranged on the top of the needle bar, and the needle bar toggle block cooperates with the connecting block.

[0005] The connecting rod mechanism includes: a swing arm fixedly connected to the motor output shaft, the swing arm is connected to one end of the V-shaped connecting rod through a straight connecting rod, the other end of the V-shaped connecting rod is connected to the toggle rod, the central fulcrum of the V-shaped connecting rod is positioned on the casing through a movable pin; the toggle rod moves inside the V-shape of the needle bar toggle block.

[0006] The motor is connected to the housing through a fixing plate, and a torsion spring A is arranged around the motor output shaft, one end of the torsion spring A is connected to the fixing plate, and the other end is connected to the connection between the swing arm and the straight connecting rod, so that the torsion spring A applies a counterclockwise force to the connection between the swing arm and the straight connecting rod, driving the toggle rod to lean back.

[0007] The needle bar toggle block is provided with a B torsion spring, one end of which is connected to the column on the V-shaped side of the needle bar toggle block, and the other end is connected to the cam driving mechanism. The B torsion spring gives the column a clockwise torsion force.

[0008] The utility model drives the connecting rod mechanism through a motor, so that the toggle rod can timely disengage the needle bar toggle block from the top of the needle bar similar to the F-shaped connecting block, thereby preventing the cam driving mechanism from continuing to drive the needle bar to work in an emergency state, thereby ensuring the quality of embroidery. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0011] Figure 3 It is a structural schematic diagram of the cam drive mechanism and the connecting rod mechanism of the utility model. DETAILED DESCRIPTION

[0012] like Figure 1-3 As shown, a needle bar disengagement mechanism of an embroidery machine includes a needle bar 2 arranged in a needle bar frame 1, a cam drive mechanism 4 arranged in a casing 3, and a needle bar toggle block 5 connected to the cam drive mechanism 4, and also includes a disengagement mechanism, the disengagement mechanism includes a motor 6, a connecting rod mechanism, and a toggle rod 7, the motor 6 is linked to the toggle rod 7 through the connecting rod mechanism; the needle bar toggle block 5 is V-shaped, and is movably connected to the cam drive mechanism 4, and the toggle rod 7 cooperates with the needle bar toggle block 5; an F-shaped connecting block 18 is provided on the top of the needle bar 2, and the needle bar toggle block 5 cooperates with the connecting block 18.

[0013] The connecting rod mechanism includes: a swing arm 8 fixedly connected to the output shaft of the motor 6, the swing arm 8 is connected to one end of a V-shaped connecting rod 10 through a straight connecting rod 9, the other end of the V-shaped connecting rod 10 is connected to a toggle rod 7, and the central fulcrum of the V-shaped connecting rod 10 is positioned on the housing 3 through a movable pin 18; the toggle rod 7 moves in the middle of the V-shape of the needle bar toggle block 5.

[0014] The motor 6 is connected to the housing 3 through a fixing plate 11. A torsion spring 12 is arranged around the output shaft of the motor 6. One end of the A torsion spring 12 is connected to a positioning pin 13 on the fixing plate 11, and the other end is connected to a connecting pin 14 between the swing arm 8 and the straight connecting rod 9.

[0015] The needle bar toggle block 5 is provided with a B torsion spring 15 , one end of which is connected to a column 16 on the V-shaped side of the needle bar toggle block 5 , and the other end is connected to a connecting column 17 of the cam driving mechanism 4 .

[0016] The cam driving mechanism 4 includes a first driving rod 19 connected to the cam 23. The first driving rod 19 is connected to the third driving block 21 through the second driving rod 20. The third driving block 21 is movably connected to the vertical rod 22. The head of the third driving block 21 is connected to the needle bar toggle block 5.

[0017] The implementation process of this utility model:

[0018] In the initial state, the needle bar toggle block 5 is disengaged from the F-shaped connecting block 18 at the top of the needle bar 2, one end of the B torsion spring applies a clockwise torsion force to the column 16, leaning against the toggle rod 7; one end of the A torsion spring 12 applies a counterclockwise torsion force to the connecting pin 14, and the straight connecting rod 9 and the V-shaped connecting rod 10 of the linkage mechanism are linked to make the toggle rod 7 lean back, thereby applying a counterclockwise force to the needle bar toggle block 5, and the counterclockwise force is greater than the torsion force of the B torsion spring, so that the V-shaped side of the needle bar toggle block 5 leans against the third driving block 21 of the cam driving mechanism 4;

[0019] Closing operation: the motor 6 is started, the motor output shaft rotates clockwise by an angle, and the swing arm 8 rotates clockwise accordingly, driving the straight connecting rod 9 and the V-shaped connecting rod 10 of the connecting rod mechanism to move, so that the toggle rod 7 is pushed forward, and one end of the B torsion spring gives a clockwise torque to the column 16, so that the needle bar toggle block 5 rotates clockwise, and the V-shaped side of the needle bar toggle block 5 cooperates with the F-shaped connecting block 18 at the top of the needle bar 2; thereby, the cam driving mechanism 4 can drive the needle bar toggle block 5 and the needle bar to work up and down.

[0020] Disengagement work: When the motor 6 is started or stopped, the motor output shaft rotates counterclockwise by an angle, and the swing arm 8 rotates counterclockwise accordingly, driving the straight connecting rod 9 and the V-shaped connecting rod 10 of the connecting rod mechanism to move, so that the toggle rod 7 is pushed backward, thereby toggling the needle bar toggle block 5 to rotate counterclockwise, so that the needle bar toggle block 5 is disengaged from the F-shaped connecting block 18 at the top of the needle bar 2.

[0021] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An embroidery machine needle bar disengagement mechanism, comprising a needle bar arranged in a needle bar frame, a cam driving mechanism arranged in a housing, and a needle bar toggle block connected to the cam driving mechanism, characterized in that: It also includes a disengagement mechanism, which includes a motor, a connecting rod mechanism, and a toggle rod. The motor is linked to the toggle rod through the connecting rod mechanism; the needle bar toggle block is V-shaped, movably connected to the cam drive mechanism, and the toggle rod cooperates with the needle bar toggle block; a similar F-shaped connecting block is provided on the top of the needle bar, and the needle bar toggle block cooperates with the connecting block.

2. The embroidery machine needle bar disengagement mechanism according to claim 1, characterized in that: The connecting rod mechanism includes: a swing arm fixedly connected to the motor output shaft, the swing arm is connected to one end of the V-shaped connecting rod through a straight connecting rod, the other end of the V-shaped connecting rod is connected to the toggle rod, the central fulcrum of the V-shaped connecting rod is positioned on the casing through a movable pin; the toggle rod moves inside the V-shape of the needle bar toggle block.

3. The embroidery machine needle bar disengagement mechanism according to claim 2, characterized in that: The motor is connected to the casing through a fixing plate, and an A torsion spring is arranged around the motor output shaft, one end of the A torsion spring is connected to the fixing plate, and the other end is connected to the connection between the swing arm and the straight connecting rod.

4. The embroidery machine needle bar disengagement mechanism according to claim 2, characterized in that: The needle bar toggle block is provided with a B torsion spring, one end of which is connected to a column on a V-shaped side of the needle bar toggle block, and the other end is connected to a cam driving mechanism.

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