Upper pressing wheel assembly of sewing machine

Abstract

The upper pressing wheel assembly of the sewing machine comprises a cloth dragging wheel, and further comprises a supporting frame and a motor, the supporting frame is connected with a machine head, the motor is fixed on the side wall of the supporting frame and drives the cloth dragging wheel to rotate, and the cloth dragging wheel is connected to the supporting frame in a rotating mode so as to achieve the purposes of being simple in structure and reducing noise.

Description

Technical Field

[0001] The utility model relates to a sewing machine, in particular to an upper pressing wheel assembly of a sewing machine. Background Art

[0002] Sewing machines are essential equipment in the textile industry.

[0003] At present, a Chinese patent with authorization announcement number CN210916538U discloses a mopping wheel device for a sewing machine. By installing the mopping wheel device on the head of the sewing machine, the mopping wheel starts to rotate continuously when the sewing machine is working, and the sewn fabric is discharged away without causing fabric accumulation on the workbench and without the need for manual discharge by the operator, thereby improving work efficiency.

[0004] However, in order to drive the mop wheel to rotate, a large number of gear structures are used, so the structure is relatively complex, prone to wear and tear, and has a large noise. Utility Model Content

[0005] In view of this, the utility model aims to provide a pressing wheel assembly on a sewing machine, which drives the cloth-pulling wheel to rotate by a motor and has a simple structure, small wear and small noise.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a pressure wheel assembly on a sewing machine, including a mop wheel, a support frame, and a motor. The support frame is connected to the machine head, the motor is fixed on the side wall of the support frame and drives the mop wheel to rotate, and the mop wheel is rotatably connected to the support frame.

[0007] To implement the above technical solution, the support frame is connected to the machine head, the motor is fixed to the support frame, and the mop wheel is driven to rotate by the motor, so as to achieve the effects of simple structure, small wear and small noise.

[0008] As a preferred solution of the utility model, the support frame is connected to the machine head through an elastic mechanism.

[0009] To implement the above technical solution, the support frame is driven to move by the elastic mechanism, so that the connection between the mop wheel and the cloth is tighter.

[0010] As a preferred solution of the utility model, the elastic mechanism includes an upper fixed seat, a lower fixed seat, an elastic member, a pressure block, and a sliding rod. The upper fixed seat and the lower fixed seat are both connected to the machine head. The sliding rod passes through the upper fixed seat and the lower fixed seat and is fixedly connected to the support frame. The pressure block is fixed to the middle part of the sliding rod, and the two ends of the elastic member are respectively connected to the upper fixed seat and the pressure block.

[0011] To implement the above technical solution, the elastic force of the elastic member is used to make the pressure block drive the slide rod to move, so that the support frame moves synchronously with the slide rod and causes the mop wheel to contact the cloth; a force is applied to the pressure block in the direction close to the upper fixed seat to overcome the elastic force of the elastic member, so that the slide rod drives the support frame to move in the direction close to the upper fixed seat, thereby separating the mop wheel from the cloth.

[0012] As a preferred solution of the utility model, a power structure for driving the pressing block to move along the length direction of the sliding rod is arranged on the lower fixing seat.

[0013] The above technical solution is implemented by setting a power structure so as to make the slide bar move along its own length direction.

[0014] As a preferred solution of the utility model, the power structure includes a connecting bolt, a support, and a push rod. The connecting bolt passes through the support and is threadedly connected to the lower fixed seat. One end of the push rod is fixedly connected to the support, and the other end of the push rod is in contact with the side of the pressure block facing the lower fixed seat.

[0015] To implement the above technical solution, there is friction between the connecting bolt and the support, and there is friction between the support and the lower fixed seat, so that the support can be positioned at any position. When a positive force is applied to the support, the support rotates along the axis of the connecting bolt, and the push rod rotates along the axis of the connecting bolt, so that the push rod pushes the pressure block upward and the slide rod moves along its own length direction, thereby separating the mop wheel from the cloth. Similarly, when a reverse force is applied to the support, the mop wheel can be moved downward and contacted with the cloth.

[0016] As a preferred solution of the utility model, a power-assisting rod is fixedly connected to the support, and the distance between the power-assisting rod and the connecting bolt is greater than the distance between the push rod and the connecting bolt.

[0017] To implement the above technical solution, the setting of the power rod increases the power arm of the rotating support to achieve a labor-saving effect, making the push rod move more labor-saving.

[0018] As a preferred solution of the utility model, a limiting structure for limiting the rotation of the support frame is provided between the lower fixing seat and the support frame.

[0019] To implement the above technical solution, by setting a limiting structure, the support frame is not easy to rotate along the axis of the slide rod when the support frame moves with the slide rod, so that the mop wheel moves more smoothly.

[0020] As a preferred solution of the utility model, the limiting structure includes a fixing plate, a limiting groove and a limiting rod, the fixing plate is fixedly connected to the lower fixing seat, the sliding rod passes through the fixing plate, the limiting groove is opened on the fixing plate, one end of the limiting rod is fixedly connected to the support frame, the other end of the limiting rod is located in the limiting groove, and the limiting rod is used to interfere with the inner wall of the limiting groove.

[0021] To implement the above technical solution, when the slide bar moves along its own length direction, the inner wall of the limit groove contacts the limit bar, so that the limit bar moves along its own length direction, making it difficult for the slide bar to rotate along its own axis, thereby allowing the mop wheel to move smoothly.

[0022] As a preferred solution of the utility model, an oil storage cavity is opened on the side wall of the support frame, and the motor blocks the oil storage cavity.

[0023] To implement the above technical solution, lubricating oil is injected into the oil storage chamber, so that the motor drives the mop wheel to rotate more smoothly and steadily.

[0024] As a preferred solution of the utility model, the upper fixing seat and the lower fixing seat are both fixed to the machine head by positioning bolts.

[0025] The above technical solution is implemented to facilitate the removal of the upper fixing seat and the lower fixing seat from the machine head for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0027] Figure 2 To show the structural diagram of the support;

[0028] Figure 3 A schematic diagram showing the position of the oil storage chamber.

[0029] Figure numerals: 1. machine head; 2. mop wheel; 21. support frame; 22. motor; 23. oil storage chamber; 3. elastic mechanism; 31. upper fixing seat; 32. lower fixing seat; 33. elastic member; 34. pressure block; 35. slide rod; 4. power structure; 41. connecting bolt; 42. support; 43. push rod; 5. power rod; 6. limiting structure; 61. fixing plate; 62. limiting groove; 63. limiting rod; 7. positioning bolt. DETAILED DESCRIPTION

[0030] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0031] A sewing machine upper pressing wheel assembly includes a cloth mopping wheel 2, a support frame 21, and a motor 22. The motor 22 is fixed to an oil storage cavity 23 with a circular cross section on the side wall of the support frame 21, and lubricating oil is injected into the oil storage cavity 23. The motor 22 is fixed to the side wall of the support frame 21 so that the motor 22 blocks the oil storage cavity 23. The motor 22 is a servo motor 22.

[0032] The motor 22 and the mop wheel 2 are rotated, and the mop wheel 2 is rotatably connected to the support frame 21. The support frame 21 is arranged in an inverted U shape.

[0033] The support frame 21 is connected to the machine head 1 through an elastic mechanism 3. The elastic mechanism 3 includes an upper fixed seat 31, a lower fixed seat 32, an elastic member 33, a pressure block 34, and a slide bar 35. The upper fixed seat 31 and the lower fixed seat 32 are fixed to the side wall of the machine head 1 through a positioning bolt 7. Among them, the upper fixed seat 31 is located above the lower fixed seat 32, and there is a certain distance between the upper fixed seat 31 and the lower fixed seat 32. The slide bar 35 is passed through the upper fixed seat 31 and the lower fixed seat 32 and fixedly connected to the support frame 21, and the slide bar 35 is vertically arranged. The pressure block is fixed to the middle part of the slide bar 35 and is located between the upper fixed seat 31 and the lower fixed seat 32.

[0034] The elastic member 33 is a spring, and the two ends of the elastic member 33 are fixedly connected to the upper fixing seat 31 and the pressing block 34 respectively. The elastic force of the elastic member 33 applies a downward force to the pressing block 34 .

[0035] A power structure 4 for driving the pressure block 34 to move along the length direction of the slide rod 35 is provided on the lower fixed seat 32. The power structure 4 includes a connecting bolt 41, a support 42, and a push rod 43. The connecting bolt 41 is horizontally arranged and threadedly connected to the side wall of the lower fixed seat 32. The connecting bolt 41 passes through the support 42, so that one side of the support 42 is pressed against the end of the connecting bolt 41, and the other side of the support 42 is pressed against the side wall of the lower fixed seat 32. One end of the push rod 43 is fixedly connected to the support 42, and the other end of the push rod 43 is pressed against the side of the pressure block 34 facing the lower fixed seat 32. A booster rod 5 is fixedly connected to the support 42, and the distance between the booster rod 5 and the connecting bolt 41 is greater than the distance between the push rod 43 and the connecting bolt 41.

[0036] Apply a positive force to the booster rod 5, the support 42 rotates along the axis of the connecting bolt 41, so that the push rod 43 moves toward the pressure block 34, so that the pressure block 34 drives the slide bar 35 to move upward, and the mop wheel 2 is separated from the cloth. The booster rod 5 is released, and the push rod 43 is positioned due to the friction between the support 42 and the connecting bolt 41 and the friction between the support 42 and the lower fixed seat 32. Similarly, apply a reverse force to the booster rod 5, so that the push rod 43 moves away from the pressure block 34, and the pressure block 34 moves downward due to the elastic force of the elastic member 33, so that the mop wheel 2 can contact the cloth.

[0037] A limiting structure 6 for limiting the rotation of the support frame 21 is provided between the lower fixed seat 32 and the support frame 21. The limiting structure 6 includes a fixing plate 61, a limiting groove 62 and a limiting rod 63. The fixing plate 61 is fixedly connected to the side of the lower fixed seat 32 facing the support frame 21. The sliding rod 35 passes through the fixing plate 61.

[0038] The limiting groove 62 is formed on the fixing plate 61 . One end of the limiting rod 63 is fixedly connected to the support frame 21 , and the other end of the limiting rod 63 is located in the limiting groove 62 . The limiting rod 63 is used to abut against the inner wall of the limiting groove 62 .

[0039] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A sewing machine upper pressing wheel assembly, comprising a cloth dragging wheel (2), characterized in that: It also comprises a support frame (21) and a motor (22), wherein the support frame (21) is connected to the machine head (1), the motor (22) is fixed on the side wall of the support frame (21) and drives the mop wheel (2) to rotate, and the mop wheel (2) is rotatably connected to the support frame (21).

2. The upper pressure wheel assembly of a sewing machine according to claim 1, characterized in that: The support frame (21) is connected to the machine head (1) via an elastic mechanism (3).

3. The upper pressure wheel assembly of a sewing machine according to claim 2, characterized in that: The elastic mechanism (3) comprises an upper fixed seat (31), a lower fixed seat (32), an elastic member (33), a pressure block (34), and a sliding rod (35); the upper fixed seat (31) and the lower fixed seat (32) are both connected to the machine head (1); the sliding rod (35) passes through the upper fixed seat (31), the lower fixed seat (32) and is fixedly connected to the support frame (21); the pressure block (34) is fixed on the sliding rod (35); and the two ends of the elastic member (33) are respectively connected to the upper fixed seat (31) and the pressure block (34).

4. The upper pressure wheel assembly of a sewing machine according to claim 3, characterized in that: The lower fixed seat (32) is provided with a power structure (4) for driving the pressing block (34) to move along the length direction of the sliding rod (35).

5. The upper pressure wheel assembly of a sewing machine according to claim 4, characterized in that: The power structure (4) comprises a connecting bolt (41), a support (42), and a push rod (43); the connecting bolt (41) passes through the support (42) and is threadedly connected to the lower fixed seat (32); one end of the push rod (43) is fixedly connected to the support (42), and the other end of the push rod (43) abuts against the side of the pressure block (34) facing the lower fixed seat (32).

6. The upper pressure wheel assembly of a sewing machine according to claim 5, characterized in that: The support (42) is fixedly connected with a booster rod (5), and the distance between the booster rod (5) and the connecting bolt (41) is greater than the distance between the push rod (43) and the connecting bolt (41).

7. The upper pressure wheel assembly of a sewing machine according to claim 3 or 6, characterized in that: A limiting structure (6) for limiting the rotation of the support frame (21) is provided between the lower fixing seat (32) and the support frame (21).

8. The upper pressure wheel assembly of a sewing machine according to claim 7, characterized in that: The limiting structure (6) comprises a fixing plate (61), a limiting groove (62) and a limiting rod (63); the fixing plate (61) is fixedly connected to the lower fixing seat (32); the sliding rod (35) passes through the fixing plate (61); the limiting groove (62) is provided on the fixing plate (61); one end of the limiting rod (63) is fixedly connected to the supporting frame (21); the other end of the limiting rod (63) is located in the limiting groove (62); and the limiting rod (63) is used to contact the inner wall of the limiting groove (62).

9. The upper pressure wheel assembly of a sewing machine according to claim 7, characterized in that: An oil storage cavity (23) is provided on the side wall of the support frame (21), and the motor (22) blocks the oil storage cavity (23).

10. The upper pressure wheel assembly of a sewing machine according to claim 3, characterized in that: The upper fixing seat (31) and the lower fixing seat (32) are both fixed on the machine head (1) via positioning bolts (7).

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