Oil quantity adjusting device for rotating shuttle of template sewing machine

Abstract

The utility model provides a rotating shuttle oil quantity adjusting device of a template sewing machine, and belongs to the field of sewing machines. The problem that an existing device cannot accurately adjust the oil quantity is solved. The template sewing machine rotating shuttle oil quantity adjusting device comprises an oil inlet pipe, an oil return pipe, an oil tank, an oil quantity adjusting valve and a plunger pump installed at the rear end of a rotating shuttle shaft, one end of the oil inlet pipe and one end of the oil return pipe are communicated with an oil inlet and an oil return opening of the plunger pump respectively, and the inner diameter of the oil inlet pipe is smaller than that of the oil return pipe. An inlet and an outlet of the oil quantity adjusting valve communicate with the other end of the oil return pipe and the oil tank. The oil quantity adjusting device for the rotating shuttle of the template sewing machine can accurately adjust the oil quantity.

Description

Technical Field

[0001] The utility model belongs to the field of sewing machines, and relates to a template sewing machine, in particular to a rotating hook oil quantity adjusting device for a template sewing machine. Background Art

[0002] As a general-purpose automated sewing device, the sewing speed of a template sewing machine has been continuously increasing from the initial low speed to high speed. The rotating hook and the rotating hook shaft rotate at high speed, requiring rotating hook oil to reduce friction, dissipate heat and lubricate. Appropriate oil quantity can ensure the stable operation of the rotating hook and a longer service life.

[0003] An existing rotating hook oil quantity adjusting device, such as a rotating hook oil supply mechanism and control method disclosed in the Chinese Patent Database (application number: 201811529428.X), includes a rotating hook, an oil supply system for supplying oil to the rotating hook, an oil cup for containing lubricating oil, an inlet oil pipe connected between the outlet of the oil cup and the inlet port of the oil supply system, and a return oil pipe connected between the outlet port of the oil supply system and the return port of the oil cup. It is characterized in that: it further includes a main control system, an inlet oil flow meter and an inlet oil quantity regulating valve both installed on the inlet oil pipe, and a return oil flow meter and a return oil quantity regulating valve both installed on the return oil pipe. The inlet oil flow meter, the inlet oil quantity regulating valve, the return oil flow meter and the return oil quantity regulating valve are all connected to the main control system.

[0004] In actual products, the inner diameters of the above-mentioned inlet oil pipe and return oil pipe are the same, which easily leads to untimely oil return, and then leads to excessive oil quantity, resulting in oil being thrown out by the rotating hook and contaminating the sewing material, affecting the sewing quality. Summary of the Utility Model

[0005] The purpose of the utility model is to address the above problems existing in the prior art and propose a rotating hook oil quantity adjusting device for a template sewing machine that can improve the oil quantity adjusting accuracy.

[0006] The purpose of the utility model can be achieved by the following technical solutions: A rotating hook oil quantity adjusting device for a template sewing machine includes an inlet pipe, a return pipe, an oil tank, an oil quantity regulating valve and a plunger pump installed at the rear end of the rotating hook shaft. One ends of the inlet pipe and the return pipe are respectively connected to the inlet and return ports of the plunger pump. It is characterized in that the inner diameter of the inlet pipe is smaller than that of the return pipe, and the inlet and outlet of the oil quantity regulating valve are respectively connected to the other end of the return pipe and the oil tank.

[0007] When the template sewing machine starts to work, the rotating hook oil enters the plunger pump through the inlet pipe, is sent to the rotating hook shaft by the plunger pump, and supplies oil to the rotating hook through the front end of the rotating hook shaft. The excess rotating hook oil inside the plunger pump flows back to the oil tank through the return pipe.

[0008] By setting the inner diameter of the oil return pipe to be larger than that of the oil inlet pipe, timely oil return can be achieved to prevent excessive oil from flowing to the rotary hook; at the same time, an oil quantity regulating valve is installed on the oil return pipe to accurately control the oil return quantity, thereby providing an extremely suitable amount of oil to the rotary hook. On the premise of ensuring the service life and running stability of the rotary hook, it can also prevent the sewing material from being contaminated and improve the sewing quality.

[0009] In the above-mentioned oil quantity regulating device for the rotary hook of the template sewing machine, the end of the above-mentioned oil inlet pipe that is not connected to the plunger pump communicates with the above-mentioned oil tank, and an oil filling hole is provided on the oil tank. The oil tank is used for both collecting the oil return and supplying oil, playing a dual role to simplify the structure and reduce the cost.

[0010] In the above-mentioned oil quantity regulating device for the rotary hook of the template sewing machine, a drain pipe is formed on the outer side of the oil tank, and the inner cavities of the drain pipe and the oil tank are connected. The end of the oil inlet pipe that is not connected to the plunger pump is screwed into the drain pipe for convenient assembly.

[0011] In the above-mentioned oil quantity regulating device for the rotary hook of the template sewing machine, a filter oil core is installed in the inner hole at the front end of the rotary hook shaft to intercept the impurities existing in the rotary hook oil and ensure the stable operation of the rotary hook.

[0012] In the above-mentioned oil quantity regulating device for the rotary hook of the template sewing machine, both the oil inlet pipe and the oil return pipe are respectively connected to the oil inlet and oil return ports of the plunger pump by oil nozzles, which have the advantages of convenient connection and stable operation.

[0013] Compared with the prior art, the oil quantity regulating device for the rotary hook of the present template sewing machine can achieve timely oil return by setting the inner diameter of the oil return pipe to be larger than that of the oil inlet pipe to prevent excessive oil from flowing to the rotary hook; at the same time, an oil quantity regulating valve is installed on the oil return pipe to accurately control the oil return quantity, thereby providing an extremely suitable amount of oil to the rotary hook. On the premise of ensuring the service life and running stability of the rotary hook, it can also prevent the sewing material from being contaminated and improve the sewing quality. Brief Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the oil quantity regulating device for the rotary hook of the present template sewing machine.

[0015] In the figure, 1. oil inlet pipe; 2. oil return pipe; 3. oil tank; 3a. drain pipe; 4. oil quantity regulating valve; 5. plunger pump; 6. oil nozzle; 7. filter oil core; 8. oil outlet screw; 9. rotary hook shaft. Detailed Description of the Invention

[0016] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0017] As Figure 1As shown in the figure, the oil quantity regulating device of the rotary hook of this template sewing machine includes an oil inlet pipe 1, an oil return pipe 2, an oil tank 3, an oil quantity regulating valve 4, and a plunger pump 5 installed at the rear end of the rotary hook shaft 9. Among them, the structure of the oil quantity regulating valve 4 and the connection between the rotary hook shaft 9 and the plunger pump 5 are both existing and will not be elaborated here.

[0018] Specifically,

[0019] One ends of the oil inlet pipe 1 and the oil return pipe 2 are respectively communicated with the oil inlet and oil return ports of the plunger pump 5. Preferably, both the oil pipe and the oil return pipe 2 are respectively communicated with the oil inlet and oil return ports of the plunger pump 5 by using oil nozzles 6, which have the advantages of convenient connection and stable operation. As Figure 1 shown, the inner diameter of the oil inlet pipe 1 is smaller than that of the oil return pipe 2, and the inlet and outlet of the oil quantity regulating valve 4 are respectively communicated with the other end of the oil return pipe 2 and the oil tank 3. In actual products, the other end of the oil return pipe 2 is directly communicated with the inlet of the oil quantity regulating valve 4; the outlet of the oil quantity regulating valve 4 is communicated with the oil tank 3 through a conduit.

[0020] When the template sewing machine starts to work, the rotary hook oil enters the plunger pump 5 through the oil inlet pipe 1, the rotary hook oil is sent into the rotary hook shaft 9 by the plunger pump 5, and the rotary hook is supplied with oil through the front end of the rotary hook shaft 9. The excess rotary hook oil inside the plunger pump 5 flows back to the oil tank 3 through the oil return pipe 2.

[0021] By setting the inner diameter of the oil return pipe 2 to be larger than that of the oil inlet pipe 1, timely oil return can be realized to prevent excessive oil from flowing to the rotary hook; at the same time, an oil quantity regulating valve 4 is installed on the oil return pipe 2 to accurately control the oil return quantity, so as to provide an extremely suitable amount of oil for the rotary hook, prevent the sewing material from being polluted, and improve the sewing quality on the premise of ensuring the service life and operation stability of the rotary hook.

[0022] Furthermore, the end of the oil inlet pipe 1 that is not connected to the plunger pump 5 is communicated with the above-mentioned oil tank 3, and an oil injection hole is provided on the oil tank 3. The oil tank 3 is used for both collecting the returned oil and supplying oil, playing a dual role to simplify the structure and reduce the cost.

[0023] In this embodiment, an oil drain pipe 3a is formed on the outer side of the oil tank 3, and the inner cavities of the oil drain pipe 3a and the oil tank 3 are connected. The end of the oil inlet pipe 1 that is not connected to the plunger pump 5 is screwed into the oil drain pipe 3a for convenient assembly. Preferably, the oil tank 3 and the oil drain pipe 3a are of an integral structure.

[0024] In actual products, a filter oil core 7 and an oil outlet screw 8 are installed in the inner hole at the front end of the rotary hook shaft 9. Among them, the oil outlet screw 8 is arranged at the rear side of the filter oil core 7. The filter oil core 7 intercepts the impurities existing in the rotary hook oil to ensure the stable operation of the rotary hook. The installation methods of the filter oil core 7 and the oil outlet screw 8 are existing, and specifically, reference can be made to the rotary hook oil supply filtering mechanism of the flat sewing machine proposed by the applicant before (Application No.: 201920766822.9).

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A rotary hook oil quantity regulating device for a template sewing machine, comprising an oil inlet pipe (1), an oil return pipe (2), an oil tank (3), an oil quantity regulating valve (4), and a plunger pump (5) installed at the rear end of a rotary hook shaft (9), wherein one end of the oil inlet pipe (1) and one end of the oil return pipe (2) are respectively connected to the oil inlet port and the oil return port of the plunger pump (5), and the device is characterized in that: The inner diameter of the oil inlet pipe (1) is smaller than the inner diameter of the oil return pipe (2), and the inlet and outlet of the oil quantity regulating valve (4) are respectively connected to the other end of the oil return pipe (2) and the oil tank (3).

2. The template sewing machine hook oil quantity regulating device according to claim 1, characterized in that: The end of the oil inlet pipe (1) not connected to the plunger pump (5) is connected to the oil tank (3), and the oil tank (3) is provided with an oil filling hole.

3. The template sewing machine hook oil quantity regulating device according to claim 2, characterized in that: An oil drain pipe (3a) is formed on the outside of the oil tank (3), and the inner cavities of the oil drain pipe (3a) and the oil tank (3) are connected. The end of the oil inlet pipe (1) not connected to the plunger pump (5) is threadedly connected to the oil drain pipe (3a).

4. The template sewing machine hook oil quantity regulating device according to claim 2 or 3, characterized in that: An oil filter core (7) is installed in the inner hole at the front end of the rotary hook shaft (9).

5. The template sewing machine hook oil quantity regulating device according to claim 1, characterized in that: The oil inlet pipe (1) and the oil return pipe (2) are respectively connected to the oil inlet and the oil return port of the plunger pump (5) by means of an oil nozzle (6).

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