A cloth feeding mechanism for a lockstitch sewing machine

Abstract

The utility model discloses a cloth feeding mechanism for a flat sewing machine, and relates to the technical field of sewing machines. The utility model comprises a machine table arranged horizontally, a movable table arranged on one side of the top of the machine table, a mounting frame 1 fixedly mounted on one side of the movable table, and a mounting frame 2 arranged on the other side of the movable table. The utility model drives the threaded cylinder to rotate by rotating a rotating block, so that the threaded cylinder drives the screw rod to move inside it under the action of the thread, thereby driving the mounting frame 2 to move away from or close to the movable table, and at the same time, the limiting guide rod is driven to slide by the mounting frame 2, so as to ensure the moving stability of the mounting frame 2, thereby achieving the effect of facilitating the adjustment of the distance between the mounting frame 1 and the mounting frame 2 according to the length of the cloth, and effectively improving the use effect, flexibility and application scope.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machines, in particular to a cloth feeding mechanism used on a lockstitch sewing machine. Background Art

[0002] A flat-bed sewing machine is also called a flat car, and is generally referred to as a single-needle flat-bed sewing machine. A flat-bed sewing machine is a machine that uses a sewing thread to form a seam on the sewing material to interweave or sew one or more layers of sewing material together.

[0003] The known authorized patent application number is: CN202322386482.6, which discloses a cloth feeding mechanism of a flat-bed sewing machine. Its background technology proposes the problem that "in the prior art, when sewing cloth, the operator needs to use one hand to continuously push the cloth into the sewing machine, and use the other hand to press the cloth, slowly pull it out of the sewing machine and adjust the direction of the cloth; it is difficult to ensure stable and lasting pulling force, and it is easy to get tired after long-term operation." Therefore, the technical solution to this problem is "including a machine table, the top of the machine table is provided with mounting groove one and mounting groove two, and the same cloth feeding component is installed in the mounting groove one and mounting groove two".

[0004] However, in the implementation of the relevant technology, it is found that the above technical solution has the following problems: although it achieves the effect of active cloth feeding through the provided technical solution, when it is used, the cloth strip is transmitted through the squeezing roller and the transmission roller on the two mounting frames, and the distance between the two mounting frames is fixed, which makes it inconvenient to adjust the spacing of the mounting frames according to the length of the cloth strip, and it is impossible to transmit the cloth that is less than the distance between the two mounting frames, which is prone to use limitations, resulting in reduced flexibility of use and scope of application. To this end, we provide a cloth feeding mechanism for a lockstitch sewing machine to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a cloth feeding mechanism for a lockstitch sewing machine, which solves the existing problem of inconvenience in adjusting the spacing between mounting frames according to cloth strips of different lengths.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a cloth feeding mechanism for a flat sewing machine, comprising: a machine table arranged horizontally; a movable table arranged at one side of the top of the machine table; a mounting frame 1 fixedly mounted on one side of the movable table; a mounting frame 2 arranged at the other side of the movable table; a base block 1 and a base block 2 respectively and symmetrically fixedly mounted on two sides of the movable table; a threaded barrel penetrating the base block 1 and rotatably connected to the base block 1, one end of the threaded barrel being fixedly connected to a rotating block; a screw rod threadedly connected in the threaded barrel and one end of which is connected to the mounting frame 2; and a limiting guide rod penetrating the base block 2 and slidably connected to the base block 2 and one end of which is connected to the mounting frame 2.

[0008] The utility model is further configured that the machine platform is provided with an adjusting mechanism for driving the movable platform to move along the length direction of the machine platform, and the first mounting frame and the second mounting frame are both provided with a cloth feeding mechanism for conveying cloth.

[0009] The utility model is further configured such that the cloth feeding mechanism comprises: a driving roller rotatably connected between two sides of the inner wall of the first mounting frame and the second mounting frame;

[0010] Two groups of sliders are symmetrically arranged on both sides of the inner walls of the mounting frame 1 and the mounting frame 2, and slots are opened on both sides of the inner walls of the mounting frame 1 and the mounting frame 2, and the sliders are slidably connected in the slots; an extrusion roller rotatably connected between the opposite surfaces of each group of sliders; an elastic component arranged on the slider for adjusting the distance between the extrusion roller and the driving roller; and a power component arranged on the mounting frame 2 for rotating the driving roller.

[0011] The utility model is further configured such that the elastic component includes: a movable rod fixedly mounted on the top of the two groups of sliders and sliding with the mounting frame 1 and the mounting frame 2 respectively; a spring sleeved on the surface of the movable rod, and the two ends of the spring are respectively connected to the bottom of the slider and the inner top wall of the slot.

[0012] The utility model is further configured that the power member includes a motor fixedly mounted on a side of the second mounting frame, and the output end of the motor passes through the second mounting frame and is connected to a corresponding driving roller.

[0013] The utility model is further configured as follows: the adjustment mechanism includes: a screw rod arranged on the machine platform, a groove is opened on the top of the machine platform, the screw rod is rotatably connected between the two sides of the inner wall of the groove, and one end of the screw rod extends to the outside of the machine platform and is fixedly connected with a rotating block; a moving block is symmetrically fixedly installed on the bottom of the movable platform and threadedly connected to the screw rod, and the moving block is slidably connected to the groove.

[0014] The utility model is further configured that two brackets are symmetrically fixedly installed on one side of the mounting frame one, a rotating roller is rotatably connected between the two brackets, a plurality of convex strips are fixedly installed on the surface of the rotating roller, a transmission component for rotating the rotating roller is provided between the rotating roller and the driving roller located in the mounting frame one, one end of the driving roller located in the mounting frame one passes through the mounting frame one, and one end of the rotating roller passes through the bracket;

[0015] The utility model is further configured that the transmission component includes: pulleys respectively fixedly connected to one end of the rotating roller and one end of the driving roller located in the mounting frame, and the two pulleys are connected by a tensioning belt.

[0016] The utility model has the following beneficial effects:

[0017] When the utility model is used, the threaded cylinder is driven to rotate by rotating the rotating block, so that the threaded cylinder drives the screw rod to move inside it under the action of the thread, thereby driving the second mounting frame to move away from or close to the movable table, and at the same time, the limiting guide rod is driven to slide accordingly by the second mounting frame, so as to ensure the movement stability of the second mounting frame, and then achieve the purpose of adjusting the distance between the first mounting frame and the second mounting frame. Therefore, it is convenient to adjust the distance between the first mounting frame and the second mounting frame according to the length of the cloth, which is convenient for conveying cloth of different sizes, avoiding the situation of limitation of use, and effectively improving the use effect, flexibility and scope of application.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0021] Figure 2 It is a partial three-dimensional structural schematic diagram of the movable platform of the utility model.

[0022] Figure 3 It is a partial three-dimensional structural schematic diagram of the second mounting frame of the utility model.

[0023] Figure 4 It is a partial three-dimensional structural schematic diagram of a mounting frame 1 of the utility model.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 100, machine table; 200, movable table; 300, mounting frame 1; 400, mounting frame 2; 500, threaded barrel; 600, screw; 700, limit guide rod; 800, adjustment mechanism; 801, screw rod; 802, moving block; 900, cloth feeding mechanism; 901, driving roller; 902, slider; 903, squeezing roller; 904, elastic component; 9041, movable rod; 9042, spring; 905, power part; 9051, motor; 1000, bracket; 1100, rotating roller; 1200, convex strip; 1300, transmission component; 1301, pulley. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0028] See also Figure 1-4 The utility model is a cloth feeding mechanism for a flat sewing machine, comprising a horizontally arranged machine platform 100, wherein a flat sewing machine body is installed on one side of the top of the machine platform 100; a movable platform 200 arranged on one side of the top of the machine platform 100; a mounting frame 1 300 fixedly installed on one side of the movable platform 200; a mounting frame 2 400 arranged on the other side of the movable platform 200; a base block 1 and a base block 2 symmetrically fixedly installed on two sides of the movable platform 200 respectively; a threaded cylinder 500 penetrating through the base block 1 and rotatably connected to the base block 1, one end of the threaded cylinder 500 being fixedly connected to a rotating block; a screw rod 600 threadedly connected in the threaded cylinder 500 and one end of which is connected to the mounting frame 2 400; and a limiting guide rod 700 penetrating through the base block 2 and slidably connected to the base block 2 and one end of which is connected to the mounting frame 2 400.

[0029] The operation process of this embodiment is as follows: when in use, when the length of the cloth is long, the threaded cylinder 500 is driven to rotate by rotating the rotating block, so that the threaded cylinder 500 drives the screw rod 600 to move inside it under the action of the thread, thereby driving the second mounting frame 400 to move away from the movable platform 200, and at the same time driving the limiting guide rod 700 to slide along with it through the second mounting frame 400, so as to ensure the movement stability of the second mounting frame 400. When the length of the cloth is less than the distance between the first mounting frame 300 and the second mounting frame 400, the screw rod 600 is moved toward the inside of the threaded cylinder 500 by reversing the rotating block, and driving the second mounting frame 400 to approach the movable platform 200, so as to reduce the distance between the first mounting frame 300 and the second mounting frame 400. Therefore, it is convenient to adjust the distance between the first mounting frame 300 and the second mounting frame 400 according to the length of the cloth, so as to facilitate the transmission of cloth of different sizes, avoid the situation of limitation of use, and effectively improve the use effect, flexibility and scope of application.

[0030] Specifically, the machine platform 100 is provided with an adjusting mechanism 800 for driving the movable platform 200 to move along the length direction of the machine platform 100, and the mounting frame 1 300 and the mounting frame 2 400 are both provided with a cloth feeding mechanism 900 for conveying cloth.

[0031] Furthermore, by providing an adjusting mechanism 800, the position of the movable table 200 can be moved to facilitate adjustment of the sewing position, and by providing a cloth feeding mechanism 900, the cloth can be automatically transported.

[0032] Specifically, the cloth feeding mechanism 900 includes:

[0033] A driving roller 901 is rotatably connected between the inner walls of the first mounting frame 300 and the second mounting frame 400;

[0034] Two groups of sliders 902 are symmetrically arranged on both sides of the inner walls of the mounting frame 1 300 and the mounting frame 2 400, and slots are opened on both sides of the inner walls of the mounting frame 1 300 and the mounting frame 2 400, and the sliders 902 are slidably connected in the slots; an extrusion roller 903 rotatably connected between the opposite surfaces of each group of sliders 902; an elastic component 904 arranged on the slider 902 for adjusting the distance between the extrusion roller 903 and the driving roller 901; and a power member 905 arranged on the mounting frame 2 400 for rotating the driving roller 901.

[0035] Furthermore, when feeding cloth, the squeezing roller 903 of the mounting frame 300 is moved upward, and the slider 902 is driven to move upward to squeeze the elastic component 904, and then the cloth is passed between the squeezing roller 903 and the driving roller 901, and the squeezing roller 903 is released, and the slider 902 is driven downward to reset by the elastic component 904, so that the squeezing roller 903 presses the cloth strip tightly, and then the cloth strip is passed between the squeezing roller 903 and the driving roller 901 on the mounting frame 400 according to the above operation, and at the same time, the driving roller 901 is driven to rotate by the power piece 905, so as to achieve the purpose of cloth transportation.

[0036] The elastic component 904 includes: a movable rod 9041 fixedly mounted on the top of the two sets of sliders 902 and sliding with the mounting frame 1 300 and the mounting frame 2 400 respectively; a spring 9042 sleeved on the surface of the movable rod 9041, and the two ends of the spring 9042 are respectively connected to the bottom of the slider 902 and the inner top wall of the slot.

[0037] Furthermore, when the squeezing roller 903 of the mounting frame 300 is moved upward, the slider 902 moves upward to drive the movable rod 9041 to move upward to squeeze the spring 9042. When the squeezing roller 903 is released, the spring 9042 drives the slider 902 to move downward to reset, so that the squeezing roller 903 presses the cloth strip.

[0038] The power member 905 includes: a motor 9051 fixedly mounted on a side of the second mounting frame 400 , and an output end of the motor 9051 passes through the second mounting frame 400 and is connected to a corresponding driving roller 901 .

[0039] Furthermore, when sewing the cloth strips, the motor 9051 drives the driving roller 901 on the second mounting frame 400 to rotate, and the friction force can be used to drive the squeezing roller 903 to rotate to transport the cloth, thereby achieving the effect of automatic cloth feeding.

[0040] Specifically, the adjustment mechanism 800 includes: a screw rod 801 arranged on the machine platform 100, a groove is opened on the top of the machine platform 100, the screw rod 801 is rotatably connected between the two sides of the inner wall of the groove, and one end of the screw rod 801 extends to the outside of the machine platform 100 and is fixedly connected with a rotating block; a moving block 802 is symmetrically fixedly installed at the bottom of the movable platform 200 and threadedly connected to the screw rod 801, and the moving block 802 is slidably connected to the groove.

[0041] Furthermore, when the suturing position needs to be adjusted, the screw rod 801 is rotated by rotating the rotating block, and the movable block 802 is driven to move laterally in the groove, thereby driving the movable table 200 to move, so as to achieve the purpose of adjusting the suturing position and facilitate operation. Specific embodiment 2

[0043] See also Figure 1-4On the basis of the specific embodiment 1, two brackets 1000 are symmetrically fixedly installed on one side of the mounting frame 300, a rotating roller 1100 is rotatably connected between the two brackets 1000, a plurality of convex strips 1200 are fixedly installed on the surface of the rotating roller 1100, a transmission component 1300 for rotating the rotating roller 1100 is provided between the rotating roller 1100 and the driving roller 901 located in the mounting frame 300, one end of the driving roller 901 located in the mounting frame 300 passes through the mounting frame 300, and one end of the rotating roller 1100 passes through the bracket 1000.

[0044] The transmission component 1300 includes: a pulley 1301 which is fixedly connected to one end of the rotating roller 1100 and one end of the driving roller 901 located in the mounting frame 300, and the two pulleys 1301 are connected by a tensioning belt.

[0045] The operation process of this embodiment is as follows: when conveying cloth, the cloth passes around the rotating roller 1100. During the process, the driving roller 901 in the mounting frame 300 rotates with the movement of the cloth, and drives the pulley 1301 at its end to rotate. At the same time, under the action of the belt, the pulley 1301 at the end of the rotating roller 1100 is driven to rotate, thereby driving the rotating roller 1100 and the convex strips 1200 on its surface to rotate, and the cloth is driven to bounce up through the convex strips 1200, so as to facilitate the dust or impurities on the surface of the cloth to be bounced off, so as to ensure the sewing effect.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A cloth feeding mechanism for a lockstitch sewing machine, characterized in that: include: A machine platform (100) is arranged horizontally; a movable platform (200) is arranged on one side of the top of the machine platform (100); a mounting frame (300) is fixedly mounted on one side of the movable platform (200); a mounting frame (400) is arranged on the other side of the movable platform (200); a base block (1) and a base block (2) are symmetrically fixedly mounted on two sides of the movable platform (200); a threaded barrel (500) is passed through the base block (1) and is rotatably connected to the base block (1), one end of the threaded barrel (500) is fixedly connected to a rotating block; a screw rod (600) is threadedly connected to the threaded barrel (500) and one end of which is connected to the mounting frame (400); and a limit guide rod (700) is passed through the base block (2) and is slidably connected to the base block (2) and one end of which is connected to the mounting frame (400).

2. A cloth feeding mechanism for a lockstitch sewing machine according to claim 1, characterized in that: The machine platform (100) is provided with an adjustment mechanism (800) for driving the movable platform (200) to move along the length direction of the machine platform (100), and the first mounting frame (300) and the second mounting frame (400) are both provided with a cloth feeding mechanism (900) for conveying cloth.

3. A cloth feeding mechanism for a lockstitch sewing machine according to claim 2, characterized in that: The cloth feeding mechanism (900) comprises: a driving roller (901) rotatably connected between two sides of the inner walls of the first mounting frame (300) and the second mounting frame (400); Two groups of sliders (902) are symmetrically arranged on both sides of the inner walls of the first mounting frame (300) and the second mounting frame (400), and slots are provided on both sides of the inner walls of the first mounting frame (300) and the second mounting frame (400), and the sliders (902) are slidably connected in the slots; an extrusion roller (903) rotatably connected between opposite surfaces of each group of sliders (902); and an elastic component (904) arranged on the slider (902) for adjusting the distance between the extrusion roller (903) and the driving roller (901); And a power member (905) is arranged on the second mounting frame (400) and causes the driving roller (901) to rotate.

4. A cloth feeding mechanism for a lockstitch sewing machine according to claim 3, characterized in that: The elastic component (904) comprises: a movable rod (9041) fixedly mounted on the top of the two sets of sliders (902) and respectively sliding with the first mounting frame (300) and the second mounting frame (400); and a spring (9042) sleeved on the surface of the movable rod (9041), wherein the two ends of the spring (9042) are respectively connected to the bottom of the slider (902) and the inner top wall of the slot.

5. The cloth feeding mechanism for a lockstitch sewing machine according to claim 3, characterized in that: The power member (905) comprises: a motor (9051) fixedly mounted on a side of the second mounting frame (400), wherein an output end of the motor (9051) passes through the second mounting frame (400) and is connected to a corresponding driving roller (901).

6. A cloth feeding mechanism for a lockstitch sewing machine according to claim 2, characterized in that: The adjustment mechanism (800) comprises: a screw rod (801) arranged on the machine platform (100), the top of the machine platform (100) is provided with a groove, the screw rod (801) is rotatably connected between two sides of the inner wall of the groove, and one end of the screw rod (801) extends to the outside of the machine platform (100) and is fixedly connected to a rotating block; A moving block (802) is symmetrically fixedly mounted on the bottom of the movable platform (200) and threadedly connected to the screw rod (801), wherein the moving block (802) is slidably connected to the groove.

7. A cloth feeding mechanism for a lockstitch sewing machine according to claim 1, characterized in that: Two brackets (1000) are symmetrically fixedly installed on one side of the mounting frame 1 (300); a rotating roller (1100) is rotatably connected between the two brackets (1000); a plurality of convex strips (1200) are fixedly installed on the surface of the rotating roller (1100); a transmission component (1300) for rotating the rotating roller (1100) is provided between the rotating roller (1100) and a driving roller (901) located in the mounting frame 1 (300); one end of the driving roller (901) located in the mounting frame 1 (300) passes through the mounting frame 1 (300), and one end of the rotating roller (1100) passes through the bracket (1000).

8. A cloth feeding mechanism for a lockstitch sewing machine according to claim 7, characterized in that: The transmission component (1300) comprises: pulleys (1301) respectively fixedly connected to one end of the rotating roller (1100) and one end of the driving roller (901) located in the first mounting frame (300), and the two pulleys (1301) are connected by a tensioning belt.

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