Upper feeding adjusting mechanism for sewing machine

Abstract

The utility model belongs to the technical field of sewing machines, and particularly relates to an upper feeding adjusting mechanism for a sewing machine, an upper shaft and an upper feeding shaft are respectively arranged in a sewing machine shell, a mounting seat is arranged on the side face of the sewing machine shell, and an adjusting assembly used for controlling an upper feeding mechanism is arranged in the mounting seat. The adjusting assembly comprises a swing seat and a swing connecting rod assembly, the lower end of the swing seat is connected with the swing connecting rod assembly, the other end of the swing connecting rod assembly is respectively connected with the upper feeding shaft and the upper shaft, and a motor is arranged on one side of the installation seat. According to the sewing machine, the motor and the adjusting assembly are independently arranged on the mounting seat of the machine head, so that the internal space behind the machine shell is vacated, other internal mechanisms are convenient to overhaul and maintain, mechanisms with other functions can be added, the sewing machine is upgraded, and the motor and the adjusting assembly are independently arranged on the mounting seat of the machine head, so that the later maintenance and overhaul are more convenient, and the cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and specifically to a feeding adjustment mechanism for a sewing machine. Background Technology

[0002] Existing differential feed adjustment mechanisms are often quite complex and mostly manually controlled, making adjustment relatively time-consuming and labor-intensive. As sewing difficulty increases, the adjustment operation becomes more cumbersome, affecting sewing efficiency and sewing results.

[0003] For example, Chinese Utility Model Patent No. CN202122099030.0 discloses a stepping differential adjustment device for a flat sewing machine, including a sewing machine housing. The sewing machine housing has a main shaft and a differential feed shaft arranged in parallel within it. A linkage transmission mechanism is provided between the main shaft and the differential feed shaft. The main shaft drives the differential feed shaft to rotate forward and backward via the linkage transmission mechanism. The sewing machine housing also has an adjustment component for adjusting the angle of the forward and reverse rotation of the differential feed shaft. This adjustment component is hinged to the linkage transmission mechanism. When the adjustment component swings relative to the differential feed shaft, the angle of the forward and reverse rotation is adjusted relative to the differential feed shaft. The device is characterized in that a motor is installed on the sewing machine housing, and a crank-connecting rod mechanism is provided between the motor's drive shaft and the adjustment component. The motor's drive shaft drives the adjustment component to swing and adjust via the crank-connecting rod mechanism.

[0004] The adjustment component is located at the rear of the housing. Since the space at the rear of the housing is already small, this makes the internal space even more cramped, leading to complicated maintenance and repair. Utility Model Content

[0005] The purpose of this invention is to provide a feeding adjustment mechanism for a sewing machine, which solves the problem of complex maintenance and repair of existing structures by setting the adjustment component at the machine head.

[0006] The purpose of this utility model is achieved as follows: A feeding adjustment mechanism for a sewing machine includes a sewing machine housing, an upper shaft and an upper feeding shaft are respectively arranged inside the sewing machine housing, a mounting base is arranged on the side of the sewing machine housing, and an adjustment component for controlling the feeding mechanism is arranged inside the mounting base. The adjustment component includes a swing seat and a swing linkage assembly. The lower end of the swing seat is connected to the swing linkage assembly, and the other end of the swing linkage assembly is connected to the upper feeding shaft and the upper shaft respectively. A motor is arranged on one side of the mounting base, a drive shaft is arranged inside the motor, an adjustment crank is installed on the outer periphery of the drive shaft, the other end of the adjustment crank is connected to an adjustment linkage, and the other end of the adjustment linkage is connected to the upper end of the swing seat.

[0007] Preferably, the mounting base has a mounting cavity formed therein for mounting the adjustment component.

[0008] Preferably, the outer wall of the mounting cavity has an opening.

[0009] Preferably, the mounting base is located at the front end of the sewing machine housing, the mounting base is integrally formed with the sewing machine housing, and the mounting base has a mounting hole for the drive shaft to pass through.

[0010] Preferably, the middle end of the swing seat is rotatably connected to the mounting base via a pin.

[0011] Preferably, the swing linkage assembly includes a first swing linkage and a second swing linkage. One end of the first swing linkage is hinged to the lower end of the swing seat, and the other end of the first swing linkage is hinged to the second swing linkage. A hinge shaft is provided between the first swing linkage and the second swing linkage. An eccentric connecting rod is provided on the outer periphery of the hinge shaft. The other end of the eccentric connecting rod is connected to the upper shaft. The other end of the second swing linkage is connected to a feeding crank, and the other end of the feeding crank is connected to the upper feeding shaft.

[0012] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0013] This invention sets the adjustment component at the front end of the sewing machine housing, freeing up the internal space behind the housing. This facilitates the inspection and maintenance of other internal mechanisms and allows for the addition of additional functional components to upgrade the sewing machine. Furthermore, since the motor and adjustment component are independently mounted on the mounting base at the machine head, subsequent maintenance and repair are more convenient, effectively reducing costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a sewing machine.

[0015] Figure 2 Schematic diagram of the differential feeding mechanism Figure 1 .

[0016] Figure 3 Schematic diagram of the differential feeding mechanism Figure 2 .

[0017] Figure 4 This is a schematic diagram of the exploded structure of the parts of the differential feeding mechanism.

[0018] Reference numerals: 1-Sewing machine housing; 2-Upper shaft; 3-Upper feed shaft; 4-Mounting base; 6-Adjusting assembly; 7-Swing seat; 8-Swing linkage assembly; 9-Motor; 10-Drive shaft; 11-Adjusting crank; 12-Adjusting linkage; 13-Mounting cavity; 14-Opening; 15-Mounting hole; 16-Pin; 17-Swing linkage one; 18-Swing linkage two; 19-Hinge shaft; 20-Eccentric linkage; 21-Feeding crank. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-4 As shown, a feeding adjustment mechanism for a sewing machine includes a sewing machine housing 1. An upper shaft 2 and an upper feeding shaft 3 are respectively arranged inside the sewing machine housing 1. An upper feeding mechanism is provided at one end of the upper feeding shaft 3. The upper feeding mechanism is an existing mechanism in the sewing machine and is not shown in the attached drawings. For its specific structural principle, please refer to the prior art with publication number CN214736543U. A mounting base 4 is provided on the side of the sewing machine housing 1. An adjustment component 6 for controlling the stroke of the upper feeding mechanism is provided inside the mounting base 4. The adjustment component 6 includes a swing seat 7 and a swing linkage assembly 8. The lower end of the swing seat 7 is connected to the swing linkage assembly 8, and the other end of the swing linkage assembly 8 is connected to both the upper feeding shaft 3 and the upper shaft 2. A motor 9 is provided on one side of the mounting base 4. A drive shaft 10 is provided inside the motor 9. An adjusting crank 11 is installed on the outer periphery of the drive shaft 10. An adjusting linkage 12 is connected to the other end of the adjusting crank 11, and the other end of the adjusting linkage 12 is connected to the upper end of the swing seat 7.

[0021] This invention sets the adjustment component 6 at the front end of the sewing machine housing 1, freeing up the internal space behind the housing. This facilitates the inspection and maintenance of other internal mechanisms and allows for the addition of other functional mechanisms to upgrade the sewing machine. Furthermore, since the motor 9 and the adjustment component 6 are independently located at the mounting base 4 of the machine head, subsequent maintenance and repair are more convenient, effectively reducing costs.

[0022] The mounting base 4 has a mounting cavity 13 formed inside for mounting the adjustment component 6. The adjustment component 6 is set inside the mounting cavity 13 and has a dustproof and protective function.

[0023] The outer wall of the mounting cavity 13 has an opening 14 to facilitate maintenance and repair of the internal adjustment component 6.

[0024] The mounting base 4 is located at the front end of the sewing machine housing 1. The mounting base 4 is integrally formed with the sewing machine housing 1. The mounting base 4 has a mounting hole 15 for the drive shaft 10 to pass through.

[0025] The middle end of the swing seat 7 is rotatably connected to the mounting base 4 via a pin 16.

[0026] In the actual adjustment process, by adjusting the motor 9 to drive the adjusting crank 11 and the adjusting connecting rod 12 to rotate, the angle of the swing seat 7 can be adjusted. When the swing seat 7 swings around the pin shaft 16, it can drive the upper feeding mechanism to change its swing amplitude, thereby changing the stroke of the upper feeding tooth.

[0027] The swing linkage assembly 8 includes a swing linkage 17 and a swing linkage 2 18. One end of the swing linkage 17 is hinged to the lower end of the swing seat 7, and the other end of the swing linkage 17 is hinged to the swing linkage 2 18. A hinge shaft 19 is provided between the swing linkage 17 and the swing linkage 2 18. An eccentric connecting rod 20 is provided on the outer periphery of the hinge shaft 19. The other end of the eccentric connecting rod 20 is connected to the upper shaft 2. The other end of the swing linkage 2 18 is connected to a feeding crank 21, and the other end of the feeding crank 21 is connected to the upper feeding shaft 3.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A feeding adjustment mechanism for a sewing machine, characterized in that, The sewing machine includes a sewing machine housing (1), in which an upper shaft (2) and an upper feed shaft (3) are respectively provided. A mounting seat (4) is provided on the side of the sewing machine housing (1). An adjustment component (6) for controlling the upper feed mechanism is provided in the mounting seat (4). The adjustment component (6) includes a swing seat (7) and a swing linkage assembly (8). The lower end of the swing seat (7) is connected to the swing linkage assembly (8). The other end of the swing linkage assembly (8) is connected to the upper feed shaft (3) and the upper shaft (2) respectively. A motor (9) is provided on one side of the mounting seat (4). A drive shaft (10) is provided in the motor (9). An adjustment crank (11) is installed on the outer periphery of the drive shaft (10). The other end of the adjustment crank (11) is connected to an adjustment link (12). The other end of the adjustment link (12) is connected to the upper end of the swing seat (7).

2. The feeding adjustment mechanism for a sewing machine according to claim 1, characterized in that: The mounting base (4) has a mounting cavity (13) formed inside for mounting the adjustment component (6).

3. The feeding adjustment mechanism for a sewing machine according to claim 2, characterized in that: An opening (14) is provided on the outer wall of the mounting cavity (13).

4. The feeding adjustment mechanism for a sewing machine according to claim 1, 2, or 3, characterized in that: The mounting base (4) is located at the front end of the sewing machine housing (1). The mounting base (4) is integrally formed with the sewing machine housing (1). The mounting base (4) has a mounting hole (15) for the drive shaft (10) to pass through.

5. The feeding adjustment mechanism for a sewing machine according to claim 1, characterized in that: The middle end of the swing seat (7) is rotatably connected to the mounting base (4) via a pin (16).

6. The feeding adjustment mechanism for a sewing machine according to claim 1, characterized in that: The swing linkage assembly (8) includes a swing linkage one (17) and a swing linkage two (18). One end of the swing linkage one (17) is hinged to the lower end of the swing seat (7), and the other end of the swing linkage one (17) is hinged to the swing linkage two (18). A hinge shaft (19) is provided between the swing linkage one (17) and the swing linkage two (18). An eccentric connecting rod (20) is provided on the outer periphery of the hinge shaft (19). The other end of the eccentric connecting rod (20) is connected to the upper shaft (2). The other end of the swing linkage two (18) is connected to a feeding crank (21), and the other end of the feeding crank (21) is connected to the upper feeding shaft (3).

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