Feeding mechanism of sewing machine

Abstract

The utility model belongs to the technical field of feeding mechanisms, and particularly relates to a feeding mechanism of a sewing machine. The cloth feeding device comprises a bottom plate piece, a first supporting column and a second supporting column are inserted into a containing bin on one side of the bottom plate piece, a cloth feeding crank is arranged on the insertion section of the first supporting column in a sleeved mode, a feed lifting crank is arranged on the insertion section of the second supporting column in a sleeved mode, and a cloth feeding dog frame is connected between the cloth feeding crank and the feed lifting crank. A feed dog lifting crank is arranged on the feed dog frame, a driving rectangular block is arranged between the feed dog lifting crank and the feed dog frame, a feed dog assembly is arranged at one end of a long force arm part on one side of the middle of the feed dog frame, and a dog mouth part is arranged at the other end of the feed dog assembly. A long suspended cloth feeding structure is integrally formed, the device is suitable for special sewing material lengthening feeding components, product diversification is enriched, and market requirements are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of feeding mechanisms and relates to a feeding mechanism for a sewing machine. Background Art

[0002] The sewing action of a sewing machine utilizes a main power component to drive the transmission mechanism, which drives the upper and lower shafts of the sewing machine. The upper shaft drives the needle bar on the eccentric connecting rod device, which is converted into the up and down movement of the sewing needle and needle thread. The lower shaft also drives the lower hook through the transmission shaft to make a circular motion or swing left and right, so that the bottom line of the lower hook and the upper needle thread form a loop structure. At the same time, the feeding mechanism is also driven by the cam and eccentric connecting rod to produce intermittent motion. In this way, the needle sews up and down once, and the fabric is fed forward a certain length, which is a complete single stitch. Continuous and rapid action can achieve the purpose of sewing multiple layers of fabric. The existing traditional reverse stitching mechanism feed mechanism is usually located on a large flat surface of the base plate to facilitate fabric manipulation. Due to special market demands, the traditional large flat surface feed mechanism is no longer applicable, and the product has a single applicability and does not meet market demand. Therefore, a sewing machine feed mechanism is proposed to address the above problems. Utility Model Content

[0003] The purpose of this utility model is to provide a feeding mechanism for a sewing machine in view of the above problems.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A sewing machine feeding mechanism includes a bottom plate part, wherein two ends of one side of the bottom plate part are respectively inserted into one end of a first support column and one end of a second support column, and the other end of the first support column and the other end of the second support column are both connected to the inside of the sewing machine, the outer sleeve of the insertion end of the first support column is provided with a feed crank below, and one end of a feed tooth frame is inserted into the upper part of the feed crank, and a pin is provided between the feed crank and one end of the feed tooth frame, the outer sleeve of the insertion end of the second support column is provided with a lifting crank below, and a driving rectangular block is provided in the end above the lifting crank, the other end of the feed tooth frame is outside the two ends of the driving rectangular block, and a pin is provided between the driving rectangular block and the other end of the feed tooth frame, a feed dog assembly is provided on one side of the middle part of the feed tooth frame, and the feed dog assembly is placed in the other end of the bottom plate part.

[0006] In the above-mentioned sewing machine feeding mechanism, a placement bin and a movable groove are respectively opened on both sides of the bottom plate, and the placement bin is connected to the inside of the movable groove, while one side of the movable groove is connected to the outside. A first support column section and a second support column section are respectively inserted and rotatably connected on both sides of the placement bin, and the other sections of the first support column and the second support column pass through the side surface of the bottom plate, and the first support column and the second support column are symmetrical.

[0007] In the above-mentioned sewing machine feeding mechanism, the first movable part is fixedly connected to the bottom of the feed crank, and the middle part of the insertion section of the first support column is inserted and fixed into the first movable part. At the same time, the top of the feed crank is lower than the top of the bottom plate. An opening is provided above the feed crank, and the two ends of the pin column are inserted into the opening.

[0008] In the above-mentioned sewing machine feeding mechanism, a first driving part is provided at one end of the feed rack, and the first driving part is placed in the opening above the feed crank. At the same time, the two sides of the first driving part are tightly fitted with the two inner walls of the feed crank opening, and the middle part of the rotating connecting pin is inserted into the first driving part.

[0009] In the above-mentioned sewing machine feeding mechanism, the other end of the feed tooth frame is fixedly connected to the second driving part, and an opening is provided in the second driving part. The two ends of the driving rectangular block are clamped in the opening of the second driving part, and a rotating connecting pin is inserted into the opening of the second driving part and the driving rectangular block.

[0010] In the above-mentioned sewing machine feeding mechanism, an opening is provided at one end of the tooth lifting crank, and the opening is placed in the opening of the second driving part. A fixedly connected driving rectangular block is inserted into the opening, and the upper and lower surfaces of the opening are tightly fitted with the upper and lower surfaces of the driving rectangular block.

[0011] In the above-mentioned sewing machine feeding mechanism, the second movable part is fixedly connected to the lower part of the other end of the tooth lifting crank, and the middle part of the second support column insertion section is inserted and fixedly connected into the second movable part, and the top of the tooth lifting crank is lower than the top of the bottom plate.

[0012] In the above-mentioned feeding mechanism of the sewing machine, one side of the middle portion of the feed tooth frame is fixedly connected to the long force arm portion, and the long force arm portion is placed in the movable groove portion.

[0013] In the above-mentioned sewing machine feeding mechanism, one end of the long force arm portion is fixedly connected to one end of the feed dog assembly, and the feed dog assembly is placed in the movable groove portion.

[0014] In the above-mentioned sewing machine feeding mechanism, the other end of the feed dog assembly is provided with a tooth mouth portion, and the top of the tooth mouth portion is flush with the top of the bottom plate member.

[0015] Compared with the existing technology, the advantages of this utility model are:

[0016] The utility model inserts the first support column and the second support column into the placement bin portion on one side of the bottom plate respectively, and a feed crank is provided in the insertion section of the first support column, and a tooth lifting crank is provided in the insertion section of the second support column, and the feed crank and the tooth lifting crank are connected to the feed tooth frame, and a driving rectangular block is provided between the tooth lifting crank and the feed tooth frame, and a feed tooth assembly is provided at one end of the long force arm portion on one side of the middle of the feed tooth frame, and a tooth mouth portion is provided at the other end of the feed tooth assembly. A major change is made by using the feed tooth frame and the feed tooth assembly, and the feed tooth frame extends a longer force arm to connect the feed dog assembly, forming a longer suspended feed structure as a whole, which is suitable for lengthening the feeding components of special sewing materials, enriching product diversification, and meeting market demand.

[0017] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the utility model;

[0019] Figure 2 It is an overall exploded schematic diagram of the utility model;

[0020] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 4 This is a structural diagram of the cloth feeding tooth frame of the utility model;

[0022] Figure 5 It is a schematic diagram of the cooperation between the feed dog frame and the feed dog assembly of the present invention.

[0023] In the figure: 1. Bottom plate; 101. Placement bin; 102. Movable slot; 2. Feed dog frame; 201. Long arm; 202. First drive; 203. Second drive; 3. Feed dog assembly; 301. Tooth opening; 4. Feed crank; 401. First movable part; 5. Tooth lifting crank; 501. Second movable part; 502. Opening; 6. First support column; 7. Second support column; 8. Driving rectangular block; 9. Pin. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1-5As shown, a feeding mechanism of a sewing machine includes a bottom plate part 1, and the two ends of one side of the bottom plate part 1 are respectively inserted into one end of a first support column 6 and one end of a second support column 7, and the other end of the first support column 6 and the other end of the second support column 7 are both connected to the inside of the sewing machine, the outer sleeve of the insertion end of the first support column 6 is provided with a feed crank 4 below, and the upper part of the feed crank 4 is inserted with one end of a feed tooth frame 2, and a pin 9 is provided between the feed crank 4 and one end of the feed tooth frame 2, and the outer sleeve of the insertion end of the second support column 7 is provided with a lifting crank 5 below, and the upper end of the lifting crank 5 is provided with a driving rectangular block 8, the other end of the feed tooth frame 2 is outside the two ends of the driving rectangular block 8, and a pin 9 is provided between the driving rectangular block 8 and the other end of the feed tooth frame 2, a feed tooth assembly 3 is provided on one side of the middle of the feed tooth frame 2, and the feed tooth assembly 3 is placed in the other end of the bottom plate part 1.

[0026] A placement bin 101 and a movable groove 102 are respectively opened on both sides of the bottom plate 1, and the placement bin 101 is connected to the movable groove 102, and one side of the movable groove 102 is connected to the outside. A section of the first support column 6 and a section of the second support column 7 are respectively inserted and rotatably connected on both sides of the placement bin 101, and the other sections of the first support column 6 and the second support column 7 pass through the side of the bottom plate 1, and the first support column 6 and the second support column 7 are symmetrical.

[0027] After inserting the first support column 6 and the second support column 7 into one side of the bottom plate 1, the first support column 6 and the second support column 7 are connected to the sewing machine to fix the bottom plate 1 and its internal structure in the sewing machine. At the same time, the first support column 6 and the second support column 7 play the role of supporting the internal structure of the bottom plate 1.

[0028] Furthermore, the first movable part 401 is fixedly connected to the bottom of the cloth feeding crank 4, and the middle part of the insertion section of the first support column 6 is inserted and fixed into the first movable part 401. At the same time, the top of the cloth feeding crank 4 is lower than the top of the bottom plate 1. An opening is provided above the cloth feeding crank 4, and the two ends of the pin column 9 are inserted into the opening.

[0029] Furthermore, a first driving part 202 is provided at one end of the feed tooth frame 2, and the first driving part 202 is placed in the opening above the feed crank 4. At the same time, both sides of the first driving part 202 are tightly fitted with the two inner walls of the opening of the feed crank 4, and the middle of the rotating connecting pin 9 is inserted into the first driving part 202.

[0030] A feed crank 4 is provided on the insertion section of the first support column 6, and the first driving part 202 at one end of the feed tooth frame 2 is connected to the top of the feed crank 4. When the feed tooth frame 2 is working, the feed crank 4 depends on the first support column 6 to make corresponding movements.

[0031] Furthermore, the other end of the feed tooth frame 2 is fixedly connected to the second driving part 203, and an opening is provided in the second driving part 203. The two ends of the driving rectangular block 8 are inserted into the opening of the second driving part 203, and the rotating connecting pin 9 is inserted into the opening of the second driving part 203 and the driving rectangular block 8.

[0032] Furthermore, an opening portion 502 is provided at one end of the tooth lifting crank 5, and the opening portion 502 is placed in the opening of the second driving portion 203, and the driving rectangular block 8 is inserted and fixedly connected in the opening portion 502, and the upper and lower surfaces of the opening portion 502 are tightly fitted with the upper and lower surfaces of the driving rectangular block 8.

[0033] Furthermore, the second movable part 501 is fixedly connected to the lower part of the other end of the tooth lifting crank 5, and the middle part of the insertion section of the second support column 7 is inserted and fixedly connected into the second movable part 501, and the top of the tooth lifting crank 5 is lower than the top of the bottom plate 1.

[0034] A driving rectangular block 8 is provided between the second driving part 203 provided at the other end of the feed tooth frame 2 and the opening part 502 of the tooth lifting crank 5. The tooth lifting crank 5 drives the feed tooth frame 2 to perform the tooth lifting operation through the shape characteristics of the rectangular block 8, and the tooth lifting crank 5 works by relying on the second support column 7.

[0035] The long arm portion 201 is fixedly connected to one side of the middle portion of the feed tooth frame 2 , and the long arm portion 201 is placed in the movable groove portion 102 .

[0036] Furthermore, one end of the long arm portion 201 is fixedly connected to one end of the feed dog assembly 3 , and the feed dog assembly 3 is placed in the movable groove portion 102 .

[0037] Furthermore, a tooth mouth portion 301 is provided at the other end of the feed dog assembly 3 , and the top of the tooth mouth portion 301 is flush with the top of the bottom plate 1 .

[0038] After the long arm portion 201 provided on one side of the middle portion of the feed dog frame 2 is connected to the feed dog assembly 3, the feed dog assembly 3 works along with the feed dog frame 2, and the tooth mouth portion 301 at one end of the feed dog assembly 3 works on the fabric.

[0039] Working principle:

[0040] A first support column 6 and a second support column 7 are respectively inserted into the placement bin 101 on one side of the bottom plate 1, and the outer ends of the first support column 6 and the second support column 7 are connected to the inside of the sewing machine to support the bottom plate 1 and its internal structure. A feed crank 4 is provided in the insertion section of the first support column 6, and a tooth lifting crank 5 is provided in the insertion section of the second support column 7. In this way, the feed crank 4 and the tooth lifting crank 5 are connected to the feed tooth frame 2, and a driving rectangular block 8 is provided between the tooth lifting crank 5 and the feed tooth frame 2. A feed dog assembly 3 is provided at one end of the long lever arm portion 201 on one side of the middle part of the feed dog frame 2, and a tooth mouth portion 301 is provided at the other end of the feed dog assembly 3 and is placed above the base plate 1. In this way, under the joint action of the feed crank 4 and the tooth lifting crank 5, the feed dog frame 2 and the feed dog assembly 3 work simultaneously. In this way, the feed dog frame 2 and the feed dog assembly 3 are driven by the feed crank 4 and the tooth lifting crank 5, and the feed dog frame 2 is provided with an extended long lever arm portion 201, forming a longer suspended feed structure as a whole.

[0041] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them with similar methods, without departing from the spirit of the present invention.

[0042] Although this document frequently uses terms such as 1. bottom plate; 101. storage compartment; 102. movable groove; 2. feed dog frame; 201. long arm; 202. first driving portion; 203. second driving portion; 3. feed dog assembly; 301. tooth opening; 4. feed crank; 401. first movable portion; 5. tooth lifting crank; 501. second movable portion; 502. opening; 6. first support column; 7. second support column; 8. driving rectangular block; 9. pin, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention. Interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A feeding mechanism for a sewing machine, comprising a bottom plate member (1), characterized in that: The two ends of one side of the bottom plate (1) are respectively inserted into one end of the first support column (6) and one end of the second support column (7), and the other end of the first support column (6) and the other end of the second support column (7) are both connected to the inside of the sewing machine. The outer shell of the insertion end of the first support column (6) is provided with a feed crank (4) below, and the upper end of the feed crank (4) is inserted into one end of the feed tooth frame (2), and a pin column (9) is provided between the feed crank (4) and one end of the feed tooth frame (2). The outer shell of the insertion end of the second support column (7) is provided with a tooth lifting crank (5) below, and the upper end of the tooth lifting crank (5) is provided with a driving rectangular block (8). The other end of the feed tooth frame (2) is outside the two ends of the driving rectangular block (8), and a pin column (9) is provided between the driving rectangular block (8) and the other end of the feed tooth frame (2). A feed tooth assembly (3) is provided on one side of the middle part of the feed tooth frame (2), and the feed tooth assembly (3) is placed in the other end of the bottom plate (1).

2. The sewing machine feeding mechanism according to claim 1, characterized in that: A placement bin (101) and a movable groove (102) are respectively provided on both sides of the bottom plate (1), and the placement bin (101) and the movable groove (102) are communicated with each other, while one side of the movable groove (102) is communicated with the outside. A first support column (6) and a second support column (7) are respectively inserted and rotatably connected on both sides of the placement bin (101), and the other sections of the first support column (6) and the second support column (7) pass through the side surface of the bottom plate (1), and the first support column (6) and the second support column (7) are symmetrical.

3. The feeding mechanism of a sewing machine according to claim 2, characterized in that: The cloth feed crank (4) is fixedly connected to the first movable part (401) below, and the middle part of the insertion section of the first support column (6) is inserted and fixedly connected into the first movable part (401). At the same time, the top of the cloth feed crank (4) is lower than the top of the bottom plate (1). An opening is provided above the cloth feed crank (4), and the two ends of the pin column (9) are inserted into the opening.

4. The feeding mechanism for a sewing machine according to claim 3, characterized in that: A first driving portion (202) is provided at one end of the cloth feeding tooth frame (2), and the first driving portion (202) is placed in an opening above the cloth feeding crank (4), and both sides of the first driving portion (202) are tightly fitted with two inner side walls of the cloth feeding crank (4) opening, and the middle part of the rotating connecting pin (9) is inserted into the first driving portion (202).

5. The feeding mechanism for a sewing machine according to claim 4, characterized in that: The other end of the cloth feeding tooth frame (2) is fixedly connected to the second driving part (203), and an opening is provided in the second driving part (203). The two ends of the driving rectangular block (8) are clamped in the opening of the second driving part (203), and a rotating connecting pin (9) is inserted between the opening of the second driving part (203) and the driving rectangular block (8).

6. The feeding mechanism for a sewing machine according to claim 5, characterized in that: An opening portion (502) is provided at one end of the tooth lifting crank (5), and the opening portion (502) is placed in the opening of the second driving portion (203). A driving rectangular block (8) is inserted and fixedly connected in the opening portion (502), and the upper and lower surfaces of the opening portion (502) are tightly fitted with the upper and lower surfaces of the driving rectangular block (8).

7. The feeding mechanism for a sewing machine according to claim 6, characterized in that: The lower portion of the other end of the tooth lifting crank (5) is fixedly connected to the second movable portion (501), and the middle portion of the insertion section of the second support column (7) is inserted and fixedly connected into the second movable portion (501), and the top of the tooth lifting crank (5) is lower than the top of the bottom plate (1).

8. The feeding mechanism for a sewing machine according to claim 7, characterized in that: One side of the middle portion of the cloth feeding tooth frame (2) is fixedly connected to a long force arm portion (201), and the long force arm portion (201) is placed in the movable groove portion (102).

9. The feeding mechanism for a sewing machine according to claim 8, characterized in that: One end of the long force arm portion (201) is fixedly connected to one end of the feed dog assembly (3), and the feed dog assembly (3) is placed in the movable groove portion (102).

10. The feeding mechanism of a sewing machine according to claim 9, characterized in that: The other end of the feed dog assembly (3) is provided with a tooth mouth portion (301), and the top of the tooth mouth portion (301) is flush with the top of the bottom plate (1).

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