Oil quantity adjusting device of sewing machine

Abstract

The utility model provides an oil quantity adjusting device of a sewing machine, and belongs to the technical field of sewing machines. The oil supply device solves the problem that an oil supply device of an existing sewing machine is difficult to effectively adjust oil quantity. The oil quantity adjusting device of the sewing machine comprises an oil disc, an oil inlet pipe and an oil return pipe, a first adjusting valve is connected to the oil inlet pipe, a second adjusting valve is connected between the oil return pipe and the oil disc, the first adjusting valve comprises a first valve body and a first rod-shaped adjusting piece, and a first oil inlet hole, a first oil outlet hole and a first adjusting hole which are communicated with one another are formed in the first valve body; the first adjusting piece is in threaded connection with the interior of the first adjusting hole of the first valve body, the outer end of the first adjusting piece extends out of the first valve body, a first conical face is arranged on the outer side of the inner end of the first adjusting piece, and the diameter of the first conical face is gradually increased from inside to outside. When the first adjusting piece is screwed in along the threads, the inner end of the first adjusting piece can stretch into the first oil outlet hole and block the first oil inlet hole and the first oil outlet hole. The oil quantity adjusting device of the sewing machine has the advantage that the oil quantity can be conveniently adjusted.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machines and relates to an oil quantity regulating device for a sewing machine. Background Art

[0002] A sewing machine uses one or more threads to create one or more stitches on a material, interweaving or stitching one or more layers of material. The high-frequency operation of a sewing machine requires lubrication, otherwise it is prone to wear and sewing problems.

[0003] The lubrication of a sewing machine mainly involves the lubrication of the hook. The oil supply device is a device that provides lubrication for the hook and is a relatively important part of the sewing machine. It is the prerequisite for ensuring the normal operation of the sewing machine.

[0004] The existing oil supply device generally includes an oil pan, an oil pump, an oil inlet pipe and an oil return pipe. The oil pan is fixed on the lower side of the base plate and is used to store lubricating oil. The oil pump is used to provide power to send the lubricating oil in the oil pan through the oil inlet pipe to the rotary hook for lubrication, and the oil return pipe is used to recover the lubricating oil to the oil pan.

[0005] However, it is difficult for the existing sewing machine oil supply device to effectively adjust the oil volume, and it is also difficult to meet the demand for no oil supply in some fabric processing processes, and it is difficult to adapt to some processing requirements of existing sewing machines. Utility Model Content

[0006] The purpose of the utility model is to solve the above problems existing in the prior art and to propose an oil quantity regulating device for a sewing machine, which solves the problem that the oil supply device of the prior sewing machine is difficult to effectively regulate the oil quantity.

[0007] The purpose of this utility model can be achieved through the following technical solutions:

[0008] and a tube connecting the dischar e side of the oil drain plug, wherein the tube has a check valve in it and the pump is closed by the pump , and the tube which connects the oil drain plug, wherein the pump is closed by the pump , and the tube which connects the oil drain plug, wherein the pump is closed by the pump .

[0009] When the oil quantity regulating device of this sewing machine is in use, regulating valve 1 and regulating valve 2 are connected in series between the oil inlet pipe and the oil return pipe and the oil pan, respectively. Regulating valve 1 regulates the oil inlet quantity of the oil inlet pipe, and regulating valve 2 regulates the oil return quantity at the oil return pipe. Using two regulating valves to regulate the oil inlet and outlet quantities improves the regulation effect. During the use of regulating valve 1, because the oil inlet hole 1 and the oil outlet hole 1 of valve body 1 are connected in series in the oil inlet pipe, oil flows out through the oil inlet hole 1 toward the oil outlet hole 1, and then flows to the hook for lubrication. During this oil supply process, the outer end of regulating member 1 can be manually rotated to adjust the depth of regulating member 1 extending into the oil outlet hole 1. The oil quantity is adjusted by the change in the gap between the conical surface 1 on the outer side of the inner end of regulating member 1 and the inner wall of valve body 1. This provides higher regulation accuracy. When necessary, regulating member 1 can be rotated in significantly so that regulating member 1 blocks the oil inlet hole 1 and the oil outlet hole 1, thereby stopping the oil supply and achieving the functions of oil quantity regulation and opening and closing control.

[0010] In the aforementioned oil quantity adjustment device for a sewing machine, a circular locking nut is threadedly connected to the outer side of the outer end of the adjusting member 1. After the position of the adjusting member 1 is adjusted, the locking nut can be screwed in, causing the locking nut to tightly abut against the end of the adjusting hole 1 of the valve body 1, thereby locking the position of the adjusting member 1 and preventing it from loosening, thereby ensuring the accuracy and stability of the oil quantity adjustment.

[0011] In the aforementioned oil quantity adjustment device for a sewing machine, the second regulating valve comprises a second valve body and a second rod-shaped regulating member. The second valve body comprises a second oil inlet hole, a second oil outlet hole, and a second regulating hole that are interconnected. The second oil inlet hole and the second oil outlet hole are opened perpendicularly to each other. The second regulating member is threadedly connected to the second regulating hole of the second valve body. One end of the second regulating member comprises a second tapered surface on the outside, which can extend into the second oil outlet hole. An oil outlet gap is formed between the outer side of the second tapered surface and the sidewall of the second oil outlet hole. The other end of the second regulating member comprises an adjusting portion. Similarly, the adjusting portion can be manually operated at the second regulating valve to rotate the second regulating member, thereby adjusting the depth of the adjusting member's insertion into the second oil outlet hole and changing the size of the oil outlet gap.

[0012] In the aforementioned oil quantity adjustment device for a sewing machine, the sidewall of the second valve body at the outlet of the second oil outlet has an inwardly projecting annular shoulder, and one end of the second adjustment member having the second tapered surface extends into the shoulder. The provision of the shoulder ensures that oil flow is maintained at other locations of the second oil outlet, while the return oil quantity is adjusted by the clearance between the shoulder and the second tapered surface. This facilitates both production and assembly and facilitates adjustment of the return oil quantity.

[0013] In the aforementioned oil quantity adjustment device for a sewing machine, the middle portion of the second adjustment member has an external thread. Several sealing rings are fixed to the outer side of the other end of the second adjustment member, which is opposite the second tapered surface. The sealing rings tightly abut against the sidewall of the second adjustment hole to form a seal. The seal formed by the sealing rings ensures the tight connection between the second oil inlet hole and the second oil outlet hole.

[0014] In the aforementioned oil quantity adjustment device for a sewing machine, the connection point between the second oil inlet hole and the second oil outlet hole is located in the middle section of the second oil inlet hole. The connection between the middle section of the second oil inlet hole and the second oil outlet hole not only facilitates the opening of the oil hole but also enables uniform oil return around the circumference of the adjustment rod, facilitating control of the return oil quantity.

[0015] In the above-mentioned oil quantity regulating device for a sewing machine, the second valve body is located at the inlet of the second oil inlet hole and is threadedly connected to a joint connected to the oil return pipe.

[0016] Compared to existing technologies, this sewing machine's oil quantity adjustment device connects regulating valves 1 and 2 in series between the oil inlet pipe and the oil return pipe and the oil pan, respectively. Regulating valve 1 regulates the oil flow into the oil inlet pipe, while regulating valve 2 regulates the oil return from the oil return pipe. Using two regulating valves to adjust the oil flow in and out improves the adjustment effect. Furthermore, regulating valve 1 has an on / off function, allowing it to be used without oil supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the oil quantity regulating device of this sewing machine.

[0018] Figure 2 It is a partial cross-sectional structural diagram of a regulating valve.

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the regulating valve at two locations.

[0020] In the figure, 1. oil pan; 2. oil inlet pipe; 3. oil return pipe; 4. regulating valve 1; 41. valve body 1; 42. regulating part 1; 42a. conical surface 1; 43. oil inlet hole 1; 44. oil outlet hole 1; 45. regulating hole 1; 46. locking nut; 5. regulating valve 2; 51. regulating part 2; 51a. conical surface 2; 51b. regulating part; 52. valve body 2; 52a. boss; 53. oil inlet hole 2; 54. oil outlet hole 2; 55. regulating hole 2; 56. sealing ring; 57. connector. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] like Figure 1As shown, the oil quantity regulating device of the sewing machine includes an oil pan 1 fixed on the lower side of the sewing machine base plate and an oil inlet pipe 2 and an oil return pipe 3 both connected to the oil pan 1, a regulating valve 1 4 is connected to the oil inlet pipe 2, and a regulating valve 2 5 is connected between the oil return pipe 3 and the oil pan 1.

[0023] like Figure 2 As shown, regulating valve 4 comprises a valve body 41 and a rod-shaped regulating member 42. Valve body 41 includes an oil inlet 43, an oil outlet 44, and an adjusting hole 45. These holes are interconnected and arranged in a T-shape. The oil outlet 44 and adjusting hole 45 extend in the same direction, while the oil inlet 43 extends perpendicularly to them. Regulating member 42 is threadedly connected to regulating hole 45 in valve body 41. The outer end of regulating member 42 extends beyond valve body 41 and is secured to a knob. A circular locking nut 46 is also threadedly connected to the outer side of the outer end of regulating member 42.

[0024] The outer side of the inner end of adjusting member 42 has a tapered surface 42a, whose diameter gradually increases from the inside outward. When adjusting member 42 is screwed in, the inner end of adjusting member 42 can extend into oil outlet hole 44, blocking both oil inlet hole 43 and oil outlet hole 44. In this embodiment, oil outlet hole 44 and adjusting hole 45 are coaxially arranged, and the diameter of oil outlet hole 44 is no larger than that of adjusting hole 45, facilitating the insertion of the inner end of adjusting member 42 and blocking the oil path.

[0025] like Figure 3 As shown, regulating valve 2 (5) comprises valve body 2 (52) and a rod-shaped regulating member 2 (51). Valve body 2 (52) includes interconnected oil inlet hole 2 (53), oil outlet hole 2 (54), and regulating hole 2 (55). These holes 53, 54, and regulating hole 2 (55) are arranged in a T-shape, with the oil inlet hole 2 (53) extending perpendicularly to the other two holes. The connection between these three holes is located in the middle of oil inlet hole 2 (53), where the inner end of oil inlet hole 2 (53) passes through the connection. A connector 57, which connects to the oil return pipe 3, is threadedly connected to the inlet of oil inlet hole 2 (53).

[0026] The middle portion of the second adjusting member 51 has external threads that are threadedly connected to the second valve body 52. ​​The outer end of the second adjusting member 51 is located within the second adjusting hole 55, and several sealing rings 56 are fixed to the outside of this end. These sealing rings 56 tightly abut against the sidewalls of the second adjusting hole 55 to form a seal. The outer end of the second adjusting member 51 has an adjusting portion 51b. In this embodiment, the adjusting portion 51b is a recessed straight groove.

[0027] The inner outer end of the second adjusting member 51 has a second tapered surface 51a, the diameter of which gradually increases from the inside out. The sidewall of the second valve body 52 at the outlet of the second oil outlet hole 54 has an inwardly projecting circular shoulder 52a. The inner end of the second adjusting member 51 extends into the shoulder 52a, forming an oil outlet gap between the outer side of the second tapered surface 51a and the sidewall of the second oil outlet hole 54.

[0028] After the oil quantity regulating device of the sewing machine is installed, the oil inlet hole 43 and the oil outlet hole 44 of the regulating valve 1 are connected in series to the oil inlet pipe 2 to control the oil inlet quantity and the on-off state of the oil inlet pipe 2. The oil inlet hole 2 53 of the regulating valve 2 5 is connected to the oil return pipe 3 through the joint 57, and the oil outlet hole 2 54 is connected to the inner cavity of the oil pan 1 to regulate the return oil quantity at the oil return pipe 3.

[0029] During operation of regulating valve 4, oil flows through oil inlet 43 toward oil outlet 44, where it then flows to lubricate the hook. During this oil supply process, the knob on the outer end of regulating member 42 can be manually turned, threading the regulating rod 1. This adjusts the depth of regulating member 42 into oil outlet 44. The oil flow is regulated by the gap between the tapered surface 42a on the inner end of regulating member 42 and the inner wall of valve body 41.

[0030] Similarly, during the use of the regulating valve 2 5, the regulating member 2 51 is rotated by inserting a tool such as a screwdriver into the regulating portion 51b, so that the regulating rod 2 is screwed in along the thread to adjust the size of the gap between the conical surface 2 51a and the boss 52a, thereby controlling the return oil volume.

[0031] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. An oil quantity regulating device for a sewing machine, comprising an oil pan (1) and an oil inlet pipe (2) and an oil return pipe (3) both connected to the oil pan (1), characterized in that: The oil inlet pipe (2) is connected to a regulating valve (4), and the oil return pipe (3) and the oil pan (1) are connected to a regulating valve (5). The regulating valve (4) comprises a valve body (41) and a rod-shaped regulating member (42). The valve body (41) has an oil inlet hole (43), an oil outlet hole (44) and a regulating hole (45). The oil inlet hole (43), the oil outlet hole (44) and the regulating hole (45) are interconnected, and the openings of the oil inlet hole (43) and the oil outlet hole (44) are connected. The adjusting member (42) is threadedly connected to the adjusting hole (45) of the valve body (41), and the outer end of the adjusting member (42) extends out of the valve body (41). The outer side of the inner end of the adjusting member (42) has a tapered surface (42a), and the diameter of the tapered surface (42a) gradually increases from the inside to the outside. When the adjusting member (42) is screwed in along the thread, the inner end of the adjusting member (42) can extend into the oil outlet hole (44) and block the oil inlet hole (43) and the oil outlet hole (44).

2. The oil quantity regulating device for a sewing machine according to claim 1, characterized in that: The outer side of the outer end of the adjusting member 1 (42) is also threadedly connected with a locking nut (46) in a circular shape.

3. The oil quantity regulating device for a sewing machine according to claim 1 or 2, characterized in that: The regulating valve (5) comprises a valve body (52) and a rod-shaped regulating member (51). The valve body (52) comprises an oil inlet hole (53), an oil outlet hole (54) and a regulating hole (55) which are interconnected. The opening directions of the oil inlet hole (53) and the oil outlet hole (54) are perpendicular to each other. The regulating member (51) is threadedly connected to the regulating hole (55) of the valve body (52). The outer side of one end of the regulating member (51) comprises a conical surface (51a), and the end of the regulating member (51) can extend into the oil outlet hole (54). An oil outlet gap is formed between the outer side of the conical surface (51a) and the side wall of the oil outlet hole (54). The other end of the regulating member (51) comprises a regulating portion (51b).

4. The oil quantity regulating device for a sewing machine according to claim 3, characterized in that: The side wall of the second valve body (52) at the outlet of the second oil outlet hole (54) has a circular shoulder (52a) protruding inward, and the second regulating member (51) has an end with a second conical surface (51a) extending into the shoulder (52a).

5. The oil quantity regulating device for a sewing machine according to claim 4, characterized in that: The middle portion of the second adjusting member (51) has an external thread, and a plurality of sealing rings (56) are fixed on the outer side of the other end of the second adjusting member (51) relative to the second conical surface (51a), and the plurality of sealing rings (56) are tightly against the side wall of the second adjusting hole (55) to form a seal.

6. The oil quantity regulating device for a sewing machine according to claim 3, characterized in that: The connecting point between the second oil inlet hole (53) and the second oil outlet hole (54) is located in the middle section of the second oil inlet hole (53).

7. The oil quantity regulating device for a sewing machine according to claim 6, characterized in that: The second valve body (52) is threadedly connected to a joint (57) connected to the oil return pipe (3) at the inlet of the second oil inlet hole (53).

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