Feeding link structure for sewing machine

Abstract

The utility model relates to sewing machine feeding technical field, and disclose a sewing machine feeding connecting rod structure, including main shaft crank and install its one side's feeding rocker, the utility model discloses through the setting of first wear -resisting block and second wear -resisting block, can improve the wear resistance of cam and second wear -resisting block, reduce the friction damage that it receives when working, prevent damage and cannot use to prevent damage and cause economic loss, satisfy the demand of user, connect the setting of oil suction mechanism and oil tank simultaneously, and oil suction mechanism can pass through the connecting pipe and suck out the lubricating oil in oil tank when connecting link drives cam rotation, and the lubricating oil is discharged through the oil pipe, and the oil is thrown out through the cam rotation simultaneously, can make it form an oil film, can convert dry friction into liquid friction, can effectively reduce the friction, and the heat generated by spraying lubricating oil can reduce friction, effectively prevent the structure from being damaged by friction, improve the service life of structure.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine feeding technology, specifically a sewing machine feeding linkage structure. Background Technology

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the fabric, so that one or more layers of fabric are interwoven or sewn together. The sewing machine requires a feeding linkage structure to feed the material.

[0003] Currently, some existing sewing machine feeding linkage structures continue to swing and feed during operation, which leads to sliding friction. This cannot prevent the structure from being damaged by friction after long-term use, rendering it unusable. Repairing it would result in economic losses and fail to meet the needs of users.

[0004] Meanwhile, some existing sewing machine feed linkage structures cannot be protected by spraying lubricating oil during operation, resulting in the inability to form an oil film on their surface for protection. This also fails to reduce the heat generated by friction during oscillation, making the mechanism highly susceptible to friction damage, reducing its service life, and thus reducing the practicality of the structure. Utility Model Content

[0005] The purpose of this invention is to provide a feeding linkage structure for a sewing machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sewing machine feed linkage structure, including a main shaft crank and a feed rocker mounted on one side thereof, and further comprising:

[0007] A feeding plate is fixedly connected to the top of the feeding rocker arm. A limit rod is provided on one side of the feeding rocker arm. A connecting rod is provided at the bottom of the feeding rocker arm. A cam is fixedly connected to one side of the connecting rod. An oil storage tank is fixedly connected to the bottom of the inner surface of the cam.

[0008] A connecting pipe is connected to the top of the oil storage tank. The top of the oil storage tank is connected to an oil suction tank through the connecting pipe. An oil suction mechanism is installed on the top of the inner surface of the oil suction tank. An oil outlet pipe is connected to one side of the oil suction tank. A second wear-resistant block made of high manganese alloy is installed on one side of the feeding rocker arm. A first wear-resistant block made of nickel-chromium alloy is installed on one side of the cam.

[0009] Preferably, the oil suction mechanism includes springs fixedly connected to both sides of the top of the oil storage tank, a piston fixedly connected to the bottom of the spring, and a movable rod fixedly connected to the top of the piston.

[0010] Preferably, a first check valve is provided on the outer surface of the connecting pipe, and a second check valve is provided on the outer surface of the oil outlet pipe.

[0011] Preferably, one side of the oil storage tank is connected to an oil injection pipe, and a third one-way valve is provided on the outer surface of the oil injection pipe.

[0012] Preferably, the diameter of the piston is the same as the diameter of the oil suction tank.

[0013] Preferably, the top of the movable rod is circular.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention, through the inclusion of a first wear-resistant block and a second wear-resistant block, improves the wear resistance of the cam and the second wear-resistant block, reduces frictional damage during operation, prevents damage rendering them unusable, and thus avoids economic losses, meeting the needs of users. Simultaneously, through the inclusion of an oil suction mechanism and an oil storage tank, when the connecting rod drives the cam to rotate, the oil suction mechanism can draw lubricating oil from the oil storage tank through the connecting pipe and discharge it through the oil outlet pipe. The rotation of the cam can also throw the oil out, forming an oil film that converts dry friction into liquid friction, effectively reducing frictional force. Furthermore, the application of lubricating oil reduces the heat generated by friction, effectively preventing structural damage and improving the service life of the structure. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram from another perspective of the present invention;

[0018] Figure 3 This is a partial three-dimensional structural cross-sectional view from another perspective of the present invention;

[0019] Figure 4 This is a partial three-dimensional structural cross-sectional view from another perspective of the present invention.

[0020] In the diagram: 1. Main shaft crank; 2. Feeding rocker arm; 3. Feeding plate; 4. Connecting rod; 5. Cam; 6. Limiting rod; 7. Oil suction mechanism; 701. Spring; 702. Piston; 703. Movable rod; 8. Oil storage tank; 9. First wear-resistant block; 10. Second wear-resistant block; 11. Oil suction tank; 12. Connecting pipe; 13. Oil injection pipe; 14. Oil outlet pipe. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-4As shown, a feeding linkage structure for a sewing machine includes a main shaft crank 1. A feeding rocker arm 2 is mounted on one side of the main shaft crank 1. The main shaft crank 1 converts rotary motion into reciprocating linear motion. A feeding plate 3 is fixedly connected to the top of the feeding rocker arm 2. The feeding rocker arm 2 converts linear motion into oscillation through the lever principle, which can drive the feeding plate 3 to feed material. A limit rod 6 is provided on one side of the feeding rocker arm 2, which can limit the feeding rocker arm 2 during feeding. A connecting rod 4 is provided at the bottom of the feeding rocker arm 2, and a cam 5 is fixedly connected to one side of the connecting rod 4. The output shaft drives the connecting rod 4 and the cam 5 to rotate, driving the feeding mechanism to complete complex motion trajectories. An oil storage tank 8 is fixedly connected to the bottom of the inner surface of the cam 5. A connecting pipe 12 is connected to the top of the oil storage tank 8. A first one-way valve is provided on the outer surface of the connecting pipe 12. The first one-way valve prevents oil from flowing back into the oil storage tank 8 through the connecting pipe 12 after being sucked in. An oil suction tank 11 is connected to the top of the oil storage tank 8 through the connecting pipe 12. An oil suction mechanism 7 is installed on the top of the inner surface of the oil suction tank 11. An oil outlet pipe 14 is connected to one side of the oil suction tank 11. A second one-way valve is provided on the outer surface of the oil outlet pipe 14. The second one-way valve prevents oil from flowing back into the oil suction tank 11 when it is discharged through the oil outlet pipe 14. The connecting rod 4 drives the cam 5 to rotate. The oil suction mechanism 7 can draw lubricating oil from the oil storage tank 8 through the connecting pipe 12 and discharge it through the oil outlet pipe 14. Simultaneously, the rotation of the cam 5 can throw the oil out, forming an oil film that converts dry friction into liquid friction, effectively reducing friction. The application of lubricating oil also reduces the heat generated by friction, effectively preventing structural damage and improving the service life of the structure. A second wear-resistant block 10 made of high-manganese alloy is installed on one side of the feeding rocker arm 2. When subjected to impact or friction, the surface of the high-manganese alloy hardens rapidly while the core remains tough, forming an outer hard and inner tough structure, resulting in excellent wear resistance. The second wear-resistant block 10 can effectively resist the wear of the feeding rocker arm 2. To achieve excellent wear resistance protection, a first wear-resistant block 9 made of nickel-chromium alloy is installed on one side of the cam 5. Nickel-chromium alloy has high hardness, which enables it to resist wear and deformation in a wear environment. Chromium forms a dense oxide film on the alloy surface, effectively preventing the steel from being further oxidized, thereby improving its wear resistance. The first wear-resistant block 9 can provide excellent wear resistance protection for the cam 5. An oil injection pipe 13 is connected to one side of the oil storage tank 8. A third one-way valve is provided on the outer surface of the oil injection pipe 13. Through the oil injection pipe 13, lubricating oil can be easily added to the oil storage tank 8. Through the third one-way valve, the added lubricating oil can easily flow into the oil injection pipe 13.

[0023] The oil suction mechanism 7 includes springs 701 fixedly connected to both sides of the top of the oil storage tank 8. A piston 702 is fixedly connected to the bottom of the springs 701, and a movable rod 703 is fixedly connected to the top of the piston 702. The diameter of the piston 702 is the same as the diameter of the oil suction tank 11, and the top of the movable rod 703 is circular. Through the oil suction mechanism 7, when the connecting rod 4 drives the cam 5 to rotate, it applies pressure to the movable rod 703. The movable rod 703 drives the piston 702 to move downward and simultaneously applies pressure to the springs 701. When it rotates to the other side, the pressure on the springs 701 is released, and the elasticity of the springs 701 drives the piston 702 to move downward. The upward movement allows the lubricating oil in the oil storage tank 8 to be drawn out through the connecting pipe 12 and discharged through the oil outlet pipe 14. At the same time, the rotation of the cam 5 can throw the oil out, forming an oil film that can convert dry friction into liquid friction, effectively reducing friction. Spraying lubricating oil can also reduce the heat generated by friction, effectively preventing the structure from being damaged by friction and improving the service life of the structure. By setting the diameter of the piston 702 to be the same as the diameter of the oil suction tank 11, a negative pressure can be generated in the oil suction tank 11, which facilitates the drawing out of the lubricating oil. The movable rod 703 can be used to apply pressure when the cam 5 rotates.

[0024] Working principle: Firstly, the first wear-resistant block 9 and the second wear-resistant block 10 improve the wear resistance of the cam 5 and the second wear-resistant block 10, reducing friction damage during operation and preventing damage that renders them unusable, thus preventing economic losses. When the connecting rod 4 drives the cam 5 to rotate, it applies pressure to the movable rod 703. The movable rod 703 drives the piston 702 downward and simultaneously applies pressure to the spring 701. When it rotates to the other side, the pressure on the spring 701 is released, and the elasticity of the spring 701 drives the piston 702 to move upward. The lubricating oil in the oil tank 8 can be drawn out through the connecting pipe 12 and discharged through the oil outlet pipe 14. At the same time, the rotation of the cam 5 can throw the oil out, forming an oil film that can convert dry friction into liquid friction, effectively reducing friction. Spraying lubricating oil can also reduce the heat generated by friction, effectively preventing the structure from being damaged by friction, improving the service life of the structure, and meeting the needs of users.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding linkage structure for a sewing machine, comprising a main shaft crank (1) and a feeding rocker (2) mounted on one side thereof, characterized in that, Also includes: A feeding plate (3) is fixedly connected to the top of the feeding rocker (2). A limit rod (6) is provided on one side of the feeding rocker (2). A connecting rod (4) is provided at the bottom of the feeding rocker (2). A cam (5) is fixedly connected to one side of the connecting rod (4). An oil storage tank (8) is fixedly connected to the bottom of the inner surface of the cam (5). A connecting pipe (12) is connected to the top of the oil storage tank (8). The top of the oil storage tank (8) is connected to an oil suction tank (11) through the connecting pipe (12). An oil suction mechanism (7) is installed on the top of the inner surface of the oil suction tank (11). An oil outlet pipe (14) is connected to one side of the oil suction tank (11). A second wear-resistant block (10) made of high manganese alloy is installed on one side of the feeding rocker (2). A first wear-resistant block (9) made of nickel-chromium alloy is installed on one side of the cam (5).

2. The feeding linkage structure of a sewing machine according to claim 1, characterized in that: The oil suction mechanism (7) includes springs (701) fixedly connected to both sides of the top of the oil storage tank (8), a piston (702) fixedly connected to the bottom of the springs (701), and a movable rod (703) fixedly connected to the top of the pistons (702).

3. The feeding linkage structure of a sewing machine according to claim 1, characterized in that: The outer surface of the connecting pipe (12) is provided with a first one-way valve, and the outer surface of the oil outlet pipe (14) is provided with a second one-way valve.

4. The feeding linkage structure of a sewing machine according to claim 1, characterized in that: One side of the oil storage tank (8) is connected to an oil injection pipe (13), and a third one-way valve is provided on the outer surface of the oil injection pipe (13).

5. The feeding linkage structure of a sewing machine according to claim 2, characterized in that: The diameter of the piston (702) is the same as the diameter of the oil suction tank (11).

6. The feeding linkage structure of a sewing machine according to claim 2, characterized in that: The top of the movable rod (703) is circular.

Images