Cloth dragging wheel structure of sewing machine

Abstract

The utility model provides a cloth dragging wheel structure of a sewing machine, and belongs to the technical field of sewing machines. The technical problem that an existing cloth dragging wheel structure is complex in structure is solved. The cloth dragging wheel structure of the sewing machine comprises a fixing support, a driving motor, a one-way bearing and a swing frame, the driving motor is fixed to the fixing support, a cloth dragging belt is rotationally connected to the swing frame, a driving wheel is arranged at one end of the cloth dragging belt, the one-way bearing is installed on the swing frame, and an outer ring of the one-way bearing is fixedly connected with the swing frame. A motor shaft of the driving motor penetrates through the one-way bearing and is fixedly connected with an inner ring of the one-way bearing, and the driving wheel is fixedly connected to the motor shaft of the driving motor. The utility model has the advantage of simple structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sewing machine technical field relates to a sewing machine's mop wheel structure. BACKGROUND

[0002] Mop wheel is the mechanism for sewing mobile fabric on the sewing machine, and the mop wheel needs to be rotated when sewing, and the mop wheel needs to be lifted when adjusting the fabric. The conventional mop wheel structure generally adopts two sets of driving sources to realize the rotation and lifting action of the mop wheel, for example, a mop wheel lifting mechanism disclosed in Chinese patent literature

application number 202021695472.0

application number 202122639198.6

application number 202323242082.4

[0003] The utility model aims at the above problems existing in prior art, and provides a sewing machine's mop wheel structure. The technical problem solved by the utility model is to realize the lifting and rotation of the mop belt through a simple structure.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A sewing machine's mop wheel structure, comprising a fixed support, a driving motor, a one-way bearing and a swing frame, the driving motor is fixed on the fixed support, the swing frame is rotatably connected with a mop belt, one end of the mop belt is provided with a driving wheel, characterized in that the one-way bearing is installed on the swing frame, the outer ring of the one-way bearing is fixedly connected with the swing frame, the motor shaft of the driving motor penetrates through the one-way bearing and is fixedly connected with the inner ring of the one-way bearing, and the driving wheel is fixedly connected on the motor shaft of the driving motor.

[0006] When the motor shaft of the driving motor rotates forward, the rotating direction is the rotating direction of the one-way bearing, at this time the one-way bearing rotates freely, the driving motor can drive the driving wheel to rotate, thus the rotation of the mop belt can be realized, at this time the mop belt is pressed on the fabric to realize the fabric feeding; when the motor shaft of the driving motor rotates reversely, the rotating direction is the locking direction of the one-way bearing, at this time the motor shaft of the driving motor can drive the whole one-way bearing to rotate reversely, since the outer ring of the one-way bearing is fixed with the swing frame, thus the driving motor can drive the swing frame to swing, realizing the lifting action of the mop belt; the swing frame is connected with the motor shaft of the driving motor through the one-way bearing, the driving motor can realize the lifting or static state of the swing frame through the cooperation of the forward and reverse rotation and the one-way bearing, at the same time the driving wheel is also installed on the motor shaft of the driving motor, thus the rotation of the mop belt can also be driven, the rotation and lifting of the mop belt are realized only through one driving source and one one-way bearing, the structure is simple and the cost is lower.

[0007] In the above-mentioned mop wheel structure of the sewing machine, the swing frame comprises a main body and a swing rod, the one-way bearing is installed on the main body, the driving wheel is located on one side of the main body, one end of the swing rod is connected with the main body, and the other end of the swing rod is rotatably connected with a driven wheel, and the other end of the mop belt is connected with the driven wheel. When the driving motor reverses, the main body can be driven to rotate through the one-way bearing, realizing the lifting of the other end of the swing rod.

[0008] In the above-mentioned mop wheel structure of the sewing machine, a limiting block is arranged above the swing frame on the fixed support. When the swing frame is lifted, the limiting block can limit the lifting height of the swing frame.

[0009] In the above-mentioned mop wheel structure of the sewing machine, a compression spring is arranged between the limiting block and the swing frame. When the motor shaft of the driving motor rotates forward, the compression spring is compressed on the swing frame, so that the mop wheel is compressed on the fabric to realize the movement of the fabric; when the motor shaft of the driving motor reverses, the swing frame swings up and down by overcoming the elastic force of the compression spring, the swing frame is kept lifted by the self-locking of the driving motor, and when the driving motor rotates forward again, the compression spring can quickly reset the swing frame downward.

[0010] In the above-mentioned mop wheel structure of the sewing machine, an adjusting bolt is screwed on the limiting block, and the upper end of the compression spring abuts against the lower end of the adjusting bolt. The elastic force of the compression spring can be adjusted by rotating the adjusting bolt, so that the force of the mop belt compressed on the fabric can be adjusted according to the different thicknesses of the fabric.

[0011] In the above-mentioned structure of the sewing machine's mop wheel, the oscillating frame is further fixed with a bidirectional bearing, the motor shaft of the driving motor passes through the bidirectional bearing, the bidirectional bearing is located inside the unidirectional bearing, and the driving wheel is located outside the unidirectional bearing. The unidirectional bearing is located between the bidirectional bearing and the driving wheel and is positioned in the axial direction. When the driving motor rotates in the forward direction, the inner ring of the unidirectional bearing and the inner ring of the bidirectional bearing rotate. When the driving motor rotates in the reverse direction, the unidirectional bearing cannot rotate, and at this time, the outer ring of the bidirectional bearing rotates to ensure smooth rotation of the motor shaft of the driving motor.

[0012] In the above-mentioned structure of the sewing machine's mop wheel, the oscillating frame is further fixed with a bidirectional bearing, the motor shaft of the driving motor passes through the bidirectional bearing, the bidirectional bearing is located inside the unidirectional bearing, and the driving wheel is located outside the unidirectional bearing. The unidirectional bearing is located between the bidirectional bearing and the driving wheel and is positioned in the axial direction. When the driving motor rotates in the forward direction, the inner ring of the unidirectional bearing and the inner ring of the bidirectional bearing rotate. When the driving motor rotates in the reverse direction, the unidirectional bearing cannot rotate, and at this time, the outer ring of the bidirectional bearing rotates to ensure smooth rotation of the motor shaft of the driving motor.

[0013] In the above-mentioned structure of the sewing machine's mop wheel, the motor shaft of the driving motor and the inner ring of the unidirectional bearing are connected by a flat key, and the outer ring of the unidirectional bearing and the fixed sleeve are connected by a flat key. The circumferential connection of the unidirectional bearing, the fixed sleeve, and the motor shaft of the driving motor by the flat key is sufficient to stably lift the oscillating frame.

[0014] Compared with the prior art, the structure of the sewing machine's mop wheel has the advantages of simple structure and lower cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a schematic diagram of the structure of the mop wheel.

[0016] Fig. 2 is a schematic diagram of the structure of the mop wheel after omitting the mop belt.

[0017] Fig. 3 is a schematic diagram of the structure of the mop wheel.

[0018] Fig. 4 is a schematic diagram of the structure of the mop wheel.

[0019] In the figure, 1 is a driving motor, 2 is a fixed support, 21 is a limiting stopper, 22 is a compression spring, 23 is an adjusting bolt, 3 is a unidirectional bearing, 4 is an oscillating frame, 41 is a main body, 411 is a limiting groove, 42 is a tensioning wheel, 43 is a swing rod, 44 is a bidirectional bearing, 5 is a mop belt, 51 is a driving wheel, 52 is a driven wheel, 6 is a fixed sleeve, 61 is a fixed arm, 62 is a fixed hole, 63 is a fixed bolt, and 7 is a flat key. DETAILED DESCRIPTION

[0020] The utility model discloses a specific embodiment as follows and further describes the technical scheme of the utility model in connection with the drawings, but the utility model is not limited to these embodiments.

[0021] Embodiment one

[0022] As Figs. 1 to 4 The sewing machine's cloth dragging wheel structure includes fixed support 2, drive motor 1, one-way bearing 3 and swing frame 4, drive motor 1 is fixed on fixed support 2, swing frame 4 is rotationally connected with cloth dragging belt 5, swing frame 4 includes main body 41 and swing lever 43, one end of swing lever 43 is connected with main body 41, drive wheel 51 is located on one side of main body 41, the other end of swing lever 43 is rotationally connected with driven wheel 52, one end of cloth dragging belt 5 is connected with drive wheel 51, the other end of cloth dragging belt 5 is connected with driven wheel 52, cloth dragging belt 5 rotates with drive wheel 51, and the cloth dragging belt 5 at one end of driven wheel 52 is pressed on the fabric and moves the fabric when feeding.

[0023] One-way bearing 3 is installed on the main body 41 of swing frame 4, as preferred, the main body 41 is fixedly connected with fixed sleeve 6 in the embodiment, fixed sleeve 6 is provided with fixed arm 61, the end of fixed arm 61 is provided with fixed hole 62, fixed hole 62 and swing frame 4 are fixed through fixed bolt 63, one-way bearing 3 is fixedly installed on fixed sleeve 6, and the outer ring of one-way bearing 3 is connected with fixed sleeve 6 through flat key 7.One-way bearing 3 and drive wheel 51 are connected on the motor shaft of drive motor 1, the motor shaft of drive motor 1 passes through one-way bearing 3 and is connected with the inner ring of one-way bearing 3 through flat key 7, drive wheel 51 is tightly connected with the motor shaft of drive motor 1, and one-way bearing 3 in the embodiment is the existing product.

[0024] The fixed support 2 is provided with limiting stopper 21 above swing frame 4, limiting stopper 21 is located above the main body 41 of swing frame 4, limiting stopper 21 and the main body 41 are provided with compression spring 22, limiting stopper 21 is screwed with adjusting bolt 23, the upper end of compression spring 22 abuts against the lower end of adjusting bolt 23, the main body 41 is provided with limiting groove 411 below adjusting bolt 23, the lower end of compression spring 22 is arranged in limiting groove 411, and the side of main body 41 is rotationally connected with tensioning wheel 42, which acts on cloth dragging belt 5 and tightens cloth dragging belt 5.

[0025] Swing frame 4 is also fixed with two-way bearing 44, two-way bearing 44 is a ball bearing, the motor shaft of drive motor 1 passes through two-way bearing 44, two-way bearing 44 is located on the inner side of one-way bearing 3, and drive wheel 51 is located on the outer side of one-way bearing 3.One-way bearing 3 is located between two-way bearing 44 and drive wheel 51 and is positioned in the axial direction.

[0026] When the motor shaft of the driving motor 1 rotates forward, the rotating direction is the rotating direction of the one-way bearing 3, at this time the one-way bearing 3 rotates freely, the driving motor 1 can drive the driving wheel 51 to rotate, thus the rotation of the mop belt 5 can be realized, at this time the mop belt 5 is pressed on the table of the sewing machine by the elastic force of the pressing spring 22, the rotation of the mop belt 5 realizes the cloth feeding; when the motor shaft of the driving motor 1 rotates reversely, the rotating direction is the locking direction of the one-way bearing 3, at this time the mop belt 5 stops rotating, the motor shaft of the driving motor 1 can drive the whole one-way bearing 3 to rotate reversely, since the outer ring of the one-way bearing 3 is fixed with the swing frame 4, the driving motor 1 drives the swing frame 4 to swing upward to overcome the elastic force of the pressing spring 22, thus the lifting action of the mop belt 5 is realized.

[0027] Embodiment two

[0028] The embodiment is basically same as the structure and principle of the embodiment one, the difference is that the motor shaft of the driving motor is in interference fit with the inner ring of the one-way bearing, and the outer ring of the one-way bearing is in interference fit with the fixed sleeve.

[0029] Embodiment three

[0030] The embodiment is basically same as the structure and principle of the embodiment one, the difference is that the one-way bearing is directly fixed on the swing frame.

[0031] Embodiment four

[0032] The embodiment is basically same as the structure and principle of the embodiment one, the difference is that the inner ring of the one-way bearing is in tight fit connection with the motor shaft of the driving motor, and the outer ring of the one-way bearing is in tight fit connection with the fixed sleeve.

[0033] The specific embodiments described in the present text are only illustrative of the spirit of the present application. The person skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A structure of a wiping wheel of a sewing machine, comprising a fixed support (2), a driving motor (1), a one-way bearing (3) and a swing frame (4), the driving motor (1) is fixed on the fixed support (2), the swing frame (4) is rotatably connected with a wiping belt (45), one end of the wiping belt (45) is provided with a driving wheel (51), characterized in that, The one-way bearing (3) is installed on the swing frame (4), the outer ring of the one-way bearing (3) is fixedly connected with the swing frame (4), the motor shaft of the driving motor (1) passes through the one-way bearing (3) and is fixedly connected with the inner ring of the one-way bearing (3), and the driving wheel (51) is fixedly connected on the motor shaft of the driving motor (1).

2. The presser foot wheel structure of the sewing machine according to claim 1, wherein The swing frame (4) comprises a main body (41) and a swing rod (43), the one-way bearing (3) is installed on the main body (41), the driving wheel (51) is located on one side of the main body (41), one end of the swing rod (43) is connected with the main body (41), the other end of the swing rod (43) is rotatably connected with a driven wheel (52), and the other end of the mop belt (45) is connected with the driven wheel (52).

3. The presser foot wheel structure of the sewing machine according to claim 1, wherein The fixed support (2) is provided with a limiting block (21) above the swing frame (4).

4. The presser foot wheel structure of the sewing machine according to claim 3, wherein The limiting block (21) and the swing frame (4) are provided with a compression spring (22).

5. The presser foot wheel structure of the sewing machine according to claim 4, wherein The limiting block (21) is screwed with an adjusting bolt (23), and the upper end of the compression spring (22) abuts against the lower end of the adjusting bolt (23).

6. The structure of the presser foot wheel of the sewing machine according to claim 1 or 2 or 3, wherein The swing frame (4) is further provided with a bidirectional bearing (44), the motor shaft of the driving motor (1) passes through the bidirectional bearing (44), the bidirectional bearing (44) is located on the inner side of the one-way bearing (3), and the driving wheel (51) is located on the outer side of the one-way bearing (3).

7. The structure of the presser foot wheel of the sewing machine according to claim 1 or 2 or 3, wherein The swing frame (4) is further provided with a fixed sleeve (6), the one-way bearing (3) is fixedly installed on the fixed sleeve (6), the fixed sleeve (6) is provided with a fixed arm (61), the end of the fixed arm (61) is provided with a fixed hole (62), and the fixed hole (62) and the swing frame (4) are fixed through a fixed bolt (63).

8. The structure of the presser foot wheel of the sewing machine according to claim 1 or 2 or 3, wherein The motor shaft of the driving motor (1) is connected with the inner ring of the one-way bearing (3) through a flat key (7), and the outer ring of the one-way bearing (3) is connected with the fixed sleeve (6) through the flat key (7).

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