Sewing machine with forward and backward sewing and presser foot lifting mechanism

Abstract

The utility model discloses a sewing machine with a forward and backward sewing mechanism and a presser foot lifting mechanism, which comprises a machine head, a first driving motor and a second driving motor are arranged on the machine head, a first shaft hole is arranged at the joint of the machine head and the first driving motor, and the machine head is further provided with the forward and backward sewing mechanism and the presser foot lifting mechanism. The first driving motor is used for driving the reverse and forward sewing mechanism to operate, the second driving motor is used for driving the presser foot lifting mechanism to operate, the machine head is further provided with a second shaft hole for installing the reverse and forward sewing mechanism, the transverse distance between the center of the first shaft hole and the center of the second shaft hole is 4-10 mm, and the longitudinal distance between the center of the first shaft hole and the center of the second shaft hole is 20-50 mm; the positions of the first shaft hole and the second shaft hole of the machine head are fixed in the transverse direction and the longitudinal direction, so that the installation positions of the first driving motor and the second driving motor which are installed on the machine head are fixed, the structures of the backward and forward sewing mechanism and the presser foot lifting mechanism do not need to be modified, and the overall structure installation speed is increased.

Description

Technical Field

[0001] This utility model relates to the field of pickup truck hood technology, specifically to a sewing machine with forward and reverse stitching and a presser foot lifting mechanism. Background Technology

[0002] A sewing machine is a machine that uses sewing thread to create one or more stitches on a workpiece, allowing one or more layers of workpiece to be interwoven or sewn together.

[0003] Currently, when installing the forward and reverse sewing mechanism and the presser foot lifting mechanism on the sewing machine head, the variety of sewing machine heads often requires adjusting the positions of the two drive motors, and also requires modifying the forward sewing mechanism and the presser foot lifting mechanism, which affects the overall installation efficiency. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sewing machine with forward and reverse stitching and presser foot lifting mechanism to solve the above problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sewing machine with a reverse and forward stitching mechanism and a presser foot lifting mechanism, comprising a machine head, a first drive motor and a second drive motor, a first shaft hole at the connection point between the machine head and the first drive motor, the machine head also being provided with a reverse and forward stitching mechanism and a presser foot lifting mechanism, the first drive motor being used to drive the reverse and forward stitching mechanism to operate, the second drive motor being used to drive the presser foot lifting mechanism to operate, the machine head also being provided with a second shaft hole for mounting the reverse and forward stitching mechanism, the lateral distance between the center of the first shaft hole and the center of the second shaft hole being 4mm-10mm, and the longitudinal distance between the center of the first shaft hole and the center of the second shaft hole being 20mm-50mm.

[0006] Furthermore, a transmission component is provided between the first drive motor and the reverse-forward sewing mechanism. The transmission component includes an eccentric wheel and a first connecting rod. The eccentric wheel is connected to the motor shaft of the first drive motor, one end of the first connecting rod is sleeved on the eccentric wheel, and the other end of the first connecting rod is connected to the reverse-forward sewing mechanism; or, the transmission component includes a crank and a second connecting rod. The crank is connected to the motor shaft of the second drive motor, one end of the second connecting rod is connected to the crank, and the other end of the second connecting rod is connected to the reverse-forward sewing mechanism.

[0007] Furthermore, the reverse and forward stitching mechanism includes a reverse and forward stitching crank, a stitch spacing seat, and a connecting rod. One end of the reverse and forward stitching crank is connected to the first connecting rod / second connecting rod, and the other end of the reverse and forward stitching crank is connected to the stitch spacing seat. The middle part of the stitch spacing seat is connected to one end of the connecting rod.

[0008] Furthermore, a reverse and forward seaming wrench shaft is provided between the reverse and forward seaming crank and the machine head, and the reverse and forward seaming crank is sleeved on the reverse and forward seaming wrench shaft.

[0009] Furthermore, the pressure foot lifting mechanism includes a pressure lifting cam and a pressure foot lifting lever. The pressure lifting cam is mounted on the motor shaft of the second drive motor, and one end of the pressure lifting cam is connected to one end of the pressure foot lifting lever.

[0010] The beneficial technical effects of this utility model are: by fixing the positions of the first shaft hole and the second shaft hole of the machine head in the horizontal and vertical directions, the installation positions of the first drive motor and the second drive motor installed on the machine head are fixed, and there is no need to modify the structure of the reverse and forward sewing mechanism and the lifting press foot mechanism, thereby improving the overall structure installation speed. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the transmission component of embodiment 1 of this utility model;

[0013] Figure 3 This is a schematic diagram of the transmission component of embodiment 2 of this utility model.

[0014] Reference numerals: 1. Machine head; 11. First shaft hole; 12. Second shaft hole; 2. First drive motor; 3. Second drive motor; 4. Reverse and forward sewing mechanism; 41. Reverse and forward sewing crank; 42. Stitch spacing seat; 43. Connecting rod; 5. Presser foot lifting mechanism; 51. Presser foot lifting cam; 52. Presser foot lifting lever; 6. Transmission component; 61. Eccentric wheel; 62. First connecting rod; 63. Crank; 64. Second connecting rod. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0016] Example 1, referring to Figure 1As shown, a sewing machine with a reverse-forward sewing mechanism and a presser foot lifting mechanism is provided. The machine head 1 includes a first drive motor 2 and a second drive motor 3. A first shaft hole 11 is provided at the connection point between the machine head 1 and the first drive motor 2. The machine head 1 also includes a reverse-forward sewing mechanism 4 and a presser foot lifting mechanism 5. The first drive motor 2 drives the reverse-forward sewing mechanism 4, and the second drive motor 3 drives the presser foot lifting mechanism 5. A mounting bracket is also provided at the connection point between the second drive motor 3 and the machine head 1. The machine head 1 also has a second shaft hole 12 for mounting the reverse-forward sewing mechanism 4. The lateral distance between the center of the first shaft hole 11 and the center of the second shaft hole 12 is 4mm-10mm, and the longitudinal distance between the center of the first shaft hole 11 and the center of the second shaft hole 12 is 20mm-50mm.

[0017] like Figure 2 The diagram shows Embodiment 1 of the transmission component 6. A transmission component 6 is provided between the first drive motor 2 and the reverse-forward stitching mechanism 4. The transmission component 6 includes an eccentric wheel 61 and a first connecting rod 62. The eccentric wheel 61 is connected to the motor shaft of the first drive motor 2. One end of the first connecting rod 62 is sleeved on the eccentric wheel 61, and the other end of the first connecting rod 62 is connected to the reverse-forward stitching mechanism 4. The reverse-forward stitching mechanism 4 includes a reverse-forward stitching crank 41, a stitch spacing seat 42, and a connecting rod 43. One end of the reverse-forward stitching crank 41 is connected to the first connecting rod 62, and the other end of the reverse-forward stitching crank 41 is connected to the stitch spacing seat 42. The middle part of the stitch spacing seat 42 is connected to one end of the connecting rod 43. A reverse-forward stitching wrench shaft is provided between the reverse-forward stitching crank 41 and the machine head 1, and the reverse-forward stitching crank 41 is sleeved on the reverse-forward stitching wrench shaft. The presser foot lifting mechanism 5 includes a presser foot lifting cam 51 and a presser foot lifting lever 52. The presser foot lifting cam 51 is mounted on the motor shaft of the second drive motor 3, and one end of the presser foot lifting cam 51 is connected to one end of the presser foot lifting lever 52.

[0018] In this embodiment, when a forward stitch is required, the first drive motor 2 is controlled to rotate clockwise, thereby driving the eccentric wheel 61 to rotate. The eccentric wheel 61 then drives the first connecting rod 62 to transmit power to the forward / reverse stitch crank 41, until the forward / reverse stitch crank 41 drives the stitch gauge seat 42 and the connecting rod 43 to perform a forward stitch, thus achieving the purpose of forward stitching. When a reverse stitch is required, the first drive motor 2 is controlled to rotate counterclockwise, thereby driving the eccentric wheel 61 to rotate. The eccentric wheel 61 then drives the first connecting rod 62 to transmit power to the forward / reverse stitch crank 41, until the forward / reverse stitch crank 41 drives the stitch gauge seat 42 to perform a forward stitch. The connecting rod 43 performs a forward stitching action; when the presser foot needs to be lifted, the presser foot lifting motor is controlled to rotate counterclockwise, with a rotation angle between 0 and 130 degrees. At this time, the presser foot lifting cam 51 rotates and drives the presser foot lifting lever 52 to lift the presser foot, thereby achieving the purpose of lifting the presser foot; by fixing the positions of the first shaft hole 11 and the second shaft hole 12 of the machine head 1 in the horizontal and vertical directions, the installation positions of the first drive motor 2 and the second drive motor 3 installed on the machine head 1 are fixed, and there is no need to modify the structure of the forward and reverse stitching mechanism 4 and the presser foot lifting mechanism 5, thereby improving the overall structure installation speed.

[0019] like Figure 3 The diagram shows embodiment 2 of the transmission component 6. The transmission component 6 includes a crank 63 and a second connecting rod 64. The crank 63 is connected to the motor shaft of the second drive motor 3. One end of the second connecting rod 64 is connected to the crank 63, and the other end is connected to the reverse stitching mechanism 4. The reverse stitching mechanism 4 includes a reverse stitching crank 41, a stitch spacing seat 42, and a connecting rod 43. One end of the reverse stitching crank 41 is connected to the second connecting rod 64, and the other end is connected to the stitch spacing seat 42. The middle part of the stitch spacing seat 42 is connected to one end of the connecting rod 43. A reverse stitching wrench shaft is provided between the reverse stitching crank 41 and the machine head 1, and the reverse stitching crank 41 is sleeved on the reverse stitching wrench shaft. The presser foot lifting mechanism 5 includes a presser foot lifting cam 51 and a presser foot lifting lever 52. The presser foot lifting cam is mounted on the motor shaft of the second drive motor 3, and one end of the presser foot lifting cam is connected to one end of the presser foot lifting lever 52.

[0020] In this embodiment, when forward stitching is required, the first drive motor 2 is controlled to rotate clockwise, thereby driving the crank 63 to rotate. The crank 63 then drives the second connecting rod 64 to transmit power to the forward / reverse stitching crank 41, until the forward / reverse stitching crank 41 drives the stitch gauge seat 42 and the connecting rod 43 to perform forward stitching, thus achieving the purpose of forward stitching. When reverse stitching is required, the first drive motor 2 is controlled to rotate counterclockwise, thereby driving the crank 63 to rotate. The crank 63 then drives the first connecting rod 62 to transmit power to the forward / reverse stitching crank 41, until the forward / reverse stitching crank 41 drives the stitch gauge seat 42 and the connecting rod 43 to perform forward stitching, thus achieving the purpose of forward stitching. The connecting rod 43 performs the forward stitching action; when it is necessary to lift the presser foot, it controls the presser foot lifting motor to rotate counterclockwise, with a rotation angle between 0 and 130 degrees. At this time, the presser foot lifting cam 51 rotates and drives the presser foot lifting lever 52 to lift the presser foot, thereby achieving the purpose of lifting the presser foot; by fixing the positions of the first shaft hole 11 and the second shaft hole 12 of the machine head 1 in the horizontal and vertical directions, the installation positions of the first drive motor 2 and the second drive motor 3 installed on the machine head 1 are fixed, and there is no need to modify the structure of the forward and reverse stitching mechanism 4 and the presser foot lifting mechanism 5, thereby improving the overall structure installation speed.

[0021] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A sewing machine having a forward and reverse stitching mechanism and a presser foot lifting mechanism, characterized in that: The machine head (1) includes a first drive motor (2) and a second drive motor (3). The machine head (1) is located at the connection point between itself and the first drive motor (2) and has a first shaft hole (11). The machine head (1) also includes a reverse and forward stitching mechanism (4) and a presser foot lifting mechanism (5). The first drive motor (2) is used to drive the reverse and forward stitching mechanism (4) to operate, and the second drive motor (3) is used to drive the presser foot lifting mechanism (5) to operate. The machine head (1) also includes a second shaft hole (12) for mounting the reverse and forward stitching mechanism (4). The lateral distance between the center of the first shaft hole (11) and the center of the second shaft hole (12) is 4mm-10mm, and the longitudinal distance between the center of the first shaft hole (11) and the center of the second shaft hole (12) is 20mm-50mm.

2. A sewing machine with a reverse and forward stitching mechanism and a presser foot lifting mechanism according to claim 1, characterized in that: A transmission component (6) is provided between the first drive motor (2) and the reverse stitching mechanism (4). The transmission component (6) includes an eccentric wheel (61) and a first connecting rod (62). The eccentric wheel (61) is connected to the motor shaft of the first drive motor (2). One end of the first connecting rod (62) is sleeved on the eccentric wheel (61), and the other end of the first connecting rod (62) is connected to the reverse stitching mechanism (4). Alternatively, the transmission component (6) includes a crank (63) and a second connecting rod (64). The crank (63) is connected to the motor shaft of the second drive motor (3). One end of the second connecting rod (64) is connected to the crank (63), and the other end of the second connecting rod (64) is connected to the reverse stitching mechanism (4).

3. A sewing machine with a reverse and forward stitching mechanism and a presser foot lifting mechanism according to claim 1, characterized in that: The reverse and forward stitching mechanism (4) includes a reverse and forward stitching crank (41), a stitch spacing seat (42), and a connecting rod (43). One end of the reverse and forward stitching crank (41) is connected to the first connecting rod (62) / the second connecting rod (64), and the other end of the reverse and forward stitching crank (41) is connected to the stitch spacing seat (42). The middle part of the stitch spacing seat (42) is connected to one end of the connecting rod (43).

4. A sewing machine with a reverse and forward stitching mechanism and a presser foot lifting mechanism according to claim 3, characterized in that: A reverse and forward stitching wrench shaft is provided between the reverse and forward stitching crank (41) and the machine head (1), and the reverse and forward stitching crank (41) is sleeved on the reverse and forward stitching wrench shaft.

5. A sewing machine with a reverse and forward stitching mechanism and a presser foot lifting mechanism according to claim 1, characterized in that: The lifting foot mechanism (5) includes a lifting cam (51) and a lifting foot lever (52). The lifting cam (51) is mounted on the motor shaft of the second drive motor (3), and one end of the lifting cam (51) is connected to one end of the lifting foot lever (52).

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