Sewing machine feed lifting crank easy to disassemble and assemble

Abstract

The utility model relates to the technical field of sewing machines, and discloses a sewing machine feed lifting crank easy to disassemble and assemble, which comprises an upper crank, a connecting table is arranged at the top of the upper crank, a limiting plate is arranged at the front end of the connecting table, a movable pin is arranged at the front end of the limiting plate, a positioning plate is arranged at the front end of the movable pin, a first connecting block is arranged at the left end of the upper crank, and a second connecting block is arranged at the right end of the upper crank. A first threaded hole and a bolt mounted in the first threaded hole are formed in the middle of the top of the first connecting block, a first mounting hole is formed in the bottom of the right end of the upper crank, a first positioning hole is formed in the left end of the inner side of the first mounting hole, a lower crank is fixedly connected to the bottom of the upper crank, and a second connecting block is arranged at the left end of the lower crank. According to the sewing machine feed lifting crank easy to disassemble and assemble, the feed lifting crank is divided into the upper part and the lower part, the upper crankshaft and the lower crankshaft are fixedly connected together through the connecting block, the convenience and tightness of connection of the upper crankshaft and the lower crankshaft are improved, assembly and disassembly are convenient, and the feed lifting crank is convenient to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine technical field, concretely is easy to dismantle sewing machine lifting tooth crank. BACKGROUND

[0002] Sewing machine is with one or more sewing line, on the material, forms one or more line, makes one layer or more material interweaves or sews up the machine, sewing machine can sew cotton, hemp, silk, wool, artificial fibre and leather, plastic, paper product, sews the line neat and beautiful, flat firm, sewing speed is fast, uses simple and convenient.

[0003] Now lifting tooth crank usually is integral type, causes when carrying out the dismounting to lifting tooth crank, first needs to dismount lifting tooth axle, can take out lifting tooth crank after dismounting lifting tooth axle, operation is more complicated, time -consuming and labor -intensive, slow dismounting efficiency. UTILITY MODEL CONTENTS

[0004] Technical problem solved

[0005] In view of prior art's insufficient, the utility model provides easy to dismantle sewing machine lifting tooth crank to solve the problem in above -mentioned background art.

[0006] Technical scheme

[0007] To realize above -mentioned purpose, the utility model provides following technical scheme: easy to dismantle sewing machine lifting tooth crank, including upper crank, the upper crank top is provided with connecting table, the connecting table front end is provided with limiting board, the limiting board front end is provided with movable pin, the movable pin front end is provided with positioning board, the upper crank left end is provided with connecting block no.

[0008] Preferably, the connecting table and the connecting block one are provided with a rounded structure at the connection with the upper crank, and the connecting block two is provided with a rounded structure at the connection with the lower crank.

[0009] Preferably, the mounting hole one and the mounting hole two can be connected to form a hole consistent with the shape and size of the connecting plate.

[0010] Preferably, the positioning hole one and the positioning hole two have a one-to-one corresponding relationship with the mounting groove two.

[0011] Preferably, the displacement block one and the displacement block two are provided with a rounded structure, and the radius of the rounded structure is the length of the positioning block protruding from the connecting plate.

[0012] Preferably, the diameter of the connecting hole is the same as the diameter of the displacement rod, and the width of the displacement block two is consistent with the width of the through hole.

[0013] Preferably, the bolt is threadedly connected inside the threaded hole one and the threaded hole two.

[0014] Compared with the prior art, the utility model provides the easy-to-disassemble sewing machine lifting tooth crank, has the following beneficial effects:

[0015] The easy-to-disassemble sewing machine lifting tooth crank divides the lifting tooth crank into two parts, and fixes and connects the upper crankshaft and the lower crankshaft together through the connecting block, improves the convenience and tightness of the connection of the upper crankshaft and the lower crankshaft, facilitates installation and disassembly, and is convenient for repairing the lifting tooth crank. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is a three-dimensional structure schematic diagram of the upper crank of the utility model;

[0018] Figure 3 It is a three-dimensional structure schematic diagram of the lower crank of the utility model;

[0019] Figure 4 It is a three-dimensional structure schematic diagram of the connecting plate of the utility model;

[0020] Figure 5 It is a three-dimensional structure schematic diagram of the displacement rod of the utility model;

[0021] Figure 6 It is a three-dimensional structure schematic diagram of the positioning block of the utility model.

[0022] In the diagram: 1. Upper crank; 2. Lower crank; 3. Connecting plate; 4. Displacement rod; 5. Positioning block; 6. Bolt; 101. Connecting platform; 102. Limiting plate; 103. Movable pin; 104. Positioning plate; 105. Connecting block one; 106. Threaded hole two; 107. Mounting hole one; 108. Positioning hole one; 201. Connecting block two; 202. Threaded hole two; 203. Mounting hole two; 204. Positioning hole two; 301. Mounting groove one; 302. Mounting groove two; 401. Spring one; 402. Connecting groove; 403. Through hole; 404. Displacement block one; 501. Spring two; 502. Connecting hole; 503. Displacement block two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-6 As shown, this utility model provides a technical solution: an easy-to-disassemble sewing machine lifting crank, including an upper crank 1, a connecting platform 101 at the top of the upper crank 1, a limiting plate 102 at the front end of the connecting platform 101, a movable pin 103 at the front end of the limiting plate 102, a positioning plate 104 at the front end of the movable pin 103, a connecting block 105 at the left end of the upper crank 1, a threaded hole 106 at the center of the top of the connecting block 105, and a bolt 6 installed inside the threaded hole 106. An installation hole 107 is provided at the bottom right end of the upper crank 1, and a positioning hole 108 is provided on the left side inside the installation hole 107. A lower crank 2 is fixedly connected to the bottom of the upper crank 1, a connecting block 201 is provided at the left end of the lower crank 2, and a threaded hole 202 is provided at the center of the top of the connecting block 201. The crank 2 has a mounting hole 203 at the top right end, and a positioning hole 204 at the left end of the mounting hole 203. A connecting plate 3 is installed inside the mounting hole 107 and the mounting hole 203. A mounting groove 301 is opened at the front end of the connecting plate 3. A displacement rod 4 is installed inside the mounting groove 301. A spring 401 is fixedly connected to the rear end of the displacement rod 4. A connecting groove 402 is opened in the middle of the displacement rod 4. A through hole 403 is opened on the side of the connecting groove 402 away from the center. A displacement block 404 is set at the front end of the connecting groove 402. A mounting groove 302 is opened at the top of the connecting plate 3. A positioning block 5 is installed inside the mounting groove 302. A spring 501 is fixedly connected to the bottom of the positioning block 5. A connecting hole 502 is opened in the middle of the positioning block 5. A displacement block 503 is set at the bottom of the connecting hole 502.

[0025] Further, the connection between the connecting platform 101 and the connecting block one 105 and the upper crank 1 is provided with a rounded structure, and the connection between the connecting block two 201 and the lower crank 2 is provided with a rounded structure.

[0026] Through the above technical scheme, the strength of the connection between the connecting platform 101 and the connecting block one 105 and the upper crank 1 and the connection between the connecting block two 201 and the lower crank 2 is increased.

[0027] Further, the mounting hole one 107 and the mounting hole two 203 can be connected to form a hole with the same shape and size as the connecting plate 3.

[0028] Through the above technical scheme, it is ensured that the upper crank 1 and the lower crank 2 can be fixedly connected together through the connecting plate 3 during installation.

[0029] Further, the positioning hole one 108 and the positioning hole two 204 have a one-to-one correspondence with the mounting groove two 302.

[0030] Through the above technical scheme, it is ensured that the positioning block 5 installed in the mounting groove two 302 can be placed in the positioning hole one 108 and the positioning hole two 204, preventing the upper crank 1 and the lower crank 2 from being misaligned during assembly.

[0031] Further, the displacement block one 404 and the displacement block two 503 are provided with a rounded structure, and the radius of the rounding is the length of the positioning block 5 protruding from the connecting plate 3.

[0032] Through the above technical scheme, it is ensured that the positioning block 5 is retracted into the mounting groove two 302 by the contact and extrusion of the displacement block one 404 and the displacement block two 503 when the displacement rod 4 is pressed inward.

[0033] Further, the diameter of the connecting hole 502 is the same as the diameter of the displacement rod 4, and the width of the displacement block two 503 is the same as the width of the through hole 403.

[0034] Through the above technical scheme, it is ensured that the displacement rod 4 is not hindered by the connecting hole 502 and the displacement block two 503 when pressed inward.

[0035] Further, the bolt 6 is threadedly connected in the threaded hole one 106 and the threaded hole two 202.

[0036] Through the above technical scheme, the upper crank 1 and the lower crank 2 are further fixedly connected together, and the tightness of the upper crank 1 and the lower crank 2 is strengthened.

[0037] Working principle: firstly, the movable pin 103 on the top of the upper crank 1 is installed inside the tooth frame, then the lower crank 2 is placed at the bottom of the upper crank 1, and the front and rear ends of the upper crank 1 and the lower crank 2 are aligned, then the part of the displacement rod 4 protruding the connecting plate 3 is pressed towards the rear end, so that the two displacement rods 4 move inward and drive the two positioning blocks 5 to move downward and retract inside the installation slot two 302, then the connecting plate 3 is installed inside the installation hole one 107 and the installation hole two 203, and after loosening the part of the displacement rod 4 protruding the connecting plate 3, the connecting plate 3 is moved forward and backward, so that the two positioning blocks 5 enter the positioning hole one 108 and the positioning hole two 204 inside through the elasticity of the spring two 501 respectively, the upper crank 1 and the lower crank 2 are fixed together, and the upper crank 1 and the lower crank 2 are assembled into a tooth lifting crank.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A detachable sewing machine jack lever comprising an upper lever (1), characterized in that: The top of the upper crank (1) is provided with a connecting table (101), the front end of the connecting table (101) is provided with a limiting plate (102), the front end of the limiting plate (102) is provided with a movable pin (103), the front end of the movable pin (103) is provided with a positioning plate (104), the left end of the upper crank (1) is provided with a connecting block one (105), the middle of the top of the connecting block one (105) is provided with a threaded hole one (106), a bolt (6) is installed in the threaded hole one (106), the bottom of the right end of the upper crank (1) is provided with a mounting hole one (107), the inner side of the left end of the mounting hole one (107) is provided with a positioning hole one (108), the bottom of the upper crank (1) is fixedly connected with a lower crank (2), the left end of the lower crank (2) is provided with a connecting block two (201), the middle of the top of the connecting block two (201) is provided with a threaded hole two (202), the top of the right end of the lower crank (2) is provided with a mounting hole two (203), the left end of the mounting hole two (203) is provided with a positioning hole two (204), the inside of the mounting hole one (107) and the mounting hole two (203) is installed with a connecting plate (3), the front end of the connecting plate (3) is provided with a mounting groove one (301), the inside of the mounting groove one (301) is installed with a displacement rod (4), the rear end of the displacement rod (4) is fixedly connected with a spring one (401), the middle of the displacement rod (4) is provided with a connecting groove (402), the side away from the center of the connecting groove (402) is provided with a through hole (403), the front end of the connecting groove (402) is provided with a displacement block one (404), the top of the connecting plate (3) is provided with a mounting groove two (302), the inside of the mounting groove two (302) is installed with a positioning block (5), the bottom of the positioning block (5) is fixedly connected with a spring two (501), the middle of the positioning block (5) is provided with a connecting hole (502), the bottom of the connecting hole (502) is provided with a displacement block two (503).

2. The removable sewing machine jack crank of claim 1, wherein: The connecting table (101) and the connecting block one (105) are provided with a rounded structure at the connection of the upper crank (1), and the connecting block two (201) is provided with a rounded structure at the connection of the lower crank (2).

3. The removable sewing machine jack crank of claim 1, wherein: The mounting hole one (107) and the mounting hole two (203) can be connected to form a hole with the same shape and size as the connecting plate (3).

4. The removable sewing machine jack crank of claim 1, wherein: The positioning hole one (108) and the positioning hole two (204) have a one-to-one correspondence with the mounting groove two (302).

5. The quick detachable sewing machine jack crank of claim 1, wherein: The displacement block one (404) and the displacement block two (503) are provided with a rounded structure, and the radius of the rounding is the length of the positioning block (5) protruding from the connecting plate (3).

6. The quick detachable sewing machine jack crank of claim 1, wherein: The diameter of the connecting hole (502) is the same as the diameter of the displacement rod (4), and the width of the displacement block two (503) is consistent with the width of the through hole (403).

7. The quick detachable sewing machine jack crank of claim 1, wherein: The bolt (6) is threadedly connected in the threaded hole one (106) and the threaded hole two (202).

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