Cooling device for oil disc in sewing machine

Abstract

The invention relates to a cooling device for an oil disc in a sewing machine, the cooling device comprises an internal cooling mechanism, a first housing and an air circulation driving mechanism, the first housing is arranged on the outer wall of the oil disc, a first air cavity is formed between the first housing and the oil disc, the internal cooling mechanism is arranged in the oil disc and comprises a plurality of cooling pipes, the thickness of each cooling pipe is 0.2-2.0 mm, and the air circulation driving mechanism is arranged in the first air cavity. The cooling pipe is fixedly connected with the oil tray, a first port of the cooling pipe is communicated with the first air cavity, a second port of the cooling pipe is communicated with the outside of the oil tray, and the air circulation driving mechanism is connected with the first air cavity of the first housing and can blow or exhaust air to the first air cavity.

Description

Technical Field

[0001] This invention relates to the field of sewing equipment technology, and more specifically to a cooling device for the oil pan in a sewing machine. Background Technology

[0002] In the sewing machinery industry, overlock sewing machines, as important industrial equipment, rely on efficient heat dissipation mechanisms for their key moving parts for continuous and stable operation. Currently, important moving parts of overlock sewing machines, such as the spindle and needle bar, generate a large amount of heat during high-speed operation. If this heat cannot be effectively dissipated, it will directly affect the precision, durability, and overall performance of the mechanical parts, and may even cause overheating failures, leading to production line shutdowns.

[0003] Traditional heat dissipation methods primarily rely on lubrication systems, where moving parts are lubricated by the oil, and the oil's flow carries away and disperses heat. However, this heated lubricating oil eventually collects in an oil pan and is cooled by natural airflow. This method has significant limitations in heat dissipation efficiency: First, the oil pan, as a structural support component, is often designed to be quite thick and heavy. This not only increases manufacturing costs but also, due to its large heat capacity and relatively insulated structure, greatly restricts natural heat convection and dissipation, reducing overall heat dissipation efficiency. Second, the natural airflow around the oil pan is usually not fully utilized. Natural air convection depends on uncontrollable factors such as ambient temperature and wind speed, and it is difficult to form a stable heat dissipation flow field, leading to heat accumulation, especially in high-temperature or enclosed working environments. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide a cooling device for the oil pan in a sewing machine, which can effectively accelerate the heat dissipation of the lubricating oil in the oil pan.

[0005] To achieve the above objectives, the present invention provides a cooling device for an oil pan in a sewing machine, comprising an internal cooling mechanism, a first cover, and an air circulation drive mechanism. The first cover is disposed on the outer wall of the oil pan and forms a first air cavity between it and the oil pan. The internal cooling mechanism is installed inside the oil pan and includes a plurality of cooling pipes. The thickness of the cooling pipes is 0.2 to 2.0 mm. The cooling pipes are fixedly connected to the oil pan, and a first port of the cooling pipe is connected to the first air cavity, and a second port is connected to the outside of the oil pan. The air circulation drive mechanism is connected to the first air cavity of the first cover and is capable of blowing or drawing air into the first air cavity.

[0006] Furthermore, the internal cooling mechanism includes multiple cooling pipes, and the cooling pipes are straight pipes.

[0007] Furthermore, cooling pipes are provided at multiple different locations along the height of the oil pan.

[0008] Furthermore, the cooling pipe is inclined in the oil pan, and the first port and the second port are located at different heights in the oil pan.

[0009] Furthermore, it also includes a second cover, which is disposed on the outer wall of the oil pan and forms a second air chamber with the oil pan. The second port of the cooling pipe is connected to the second air chamber, and the second cover is provided with a plurality of second vents.

[0010] Furthermore, the internal cooling mechanism includes a cooling pipe, which is bent within the oil pan.

[0011] Furthermore, the cooling pipe includes multiple working straight pipe sections and a connecting bend section connecting two working straight pipe sections. The working straight pipe sections are inclined in the oil pan, and the first port and the second port are located at different heights in the oil pan.

[0012] Furthermore, both ends of the cooling pipe are provided with variable diameter sections that gradually narrow, with the inner diameter of the port being the smallest.

[0013] Furthermore, the first cover is provided with a first vent, and the air circulation drive mechanism includes a fan disposed in the first vent.

[0014] Furthermore, both ends of the cooling pipe are connected to the side wall of the oil pan via a connecting structure. The connecting structure includes a sealing gasket, a nut, a connecting pipe, a rubber tube, and a clamp. The connecting pipe passes through the side wall of the oil pan, and a limiting ring is provided on the connecting pipe to abut against the inner wall surface of the oil pan. The sealing gasket is placed between the limiting ring and the inner wall surface of the oil pan. The nut is screwed onto the connecting pipe and pressed against the outer wall surface of the oil pan. The rubber tube is fitted onto the connecting pipe, and the end of the cooling pipe is fitted onto the rubber tube. The clamp securely fastens and fixes the cooling pipe to the connecting pipe.

[0015] As described above, the cooling device of the present invention has the following beneficial effects:

[0016] Through the internal cooling mechanism, the first casing, and the air circulation drive mechanism, flowing air is directly introduced into the cooling pipes located in the oil pan using the air circulation drive mechanism and the first casing. The cooling pipes exchange heat with the lubricating oil in the oil pan, which can significantly increase the heat exchange area with the lubricating oil. Moreover, the wall thickness of the cooling pipes is much smaller than the wall thickness of the oil pan. Compared with the existing method of air cooling outside the oil pan, it can effectively improve the cooling effect. The cooling pipes are arranged at an angle or in multiple layers in the oil pan, which can uniformly cool the lubricating oil at different heights. Furthermore, the lubricating oil can be in a turbulent state, which can improve the heat dissipation efficiency. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of a first embodiment of the cooling device of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of a first embodiment of the cooling device of the present invention.

[0019] Figure 3 This is a top view of a first embodiment of the cooling device of the present invention.

[0020] Figure 4 This is a cross-sectional view of a first embodiment of the cooling device of the present invention.

[0021] Figure 5 This is an exploded view of a first embodiment of the cooling device of the present invention.

[0022] Figure 6 This is a cross-sectional view of a second embodiment of the cooling device of the present invention.

[0023] Explanation of icon numbers

[0024] 1. Oil pan

[0025] 2 Cooling pipes

[0026] 21. Directly managed work section

[0027] 22 Connecting bends

[0028] 3 First Cover

[0029] 31 First vent

[0030] 4 fans

[0031] 5 Second casing

[0032] 51 Second Vent

[0033] 6 nuts

[0034] 7. Sealing gasket

[0035] 8 Connecting pipes

[0036] 9. Rubber hose

[0037] 10 clamps Detailed Implementation

[0038] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0039] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0040] See Figures 1 to 6 This invention provides a cooling device for an oil pan 1 in a sewing machine, comprising an internal cooling mechanism, a first cover 3, and an airflow drive mechanism. The first cover 3 is disposed on the outer wall of the oil pan 1, forming a first air cavity between the cover 3 and the oil pan 1. The internal cooling mechanism is installed inside the oil pan 1 and includes several cooling pipes 2. The cooling pipes 2 are thin-walled pipes with a wall thickness of 0.2–2.0 mm, preferably 0.5 mm. The cooling pipes 2 are fixedly connected to the oil pan 1, and a first end of the cooling pipe 2 is connected to the first air cavity, while a second end is connected to the outside of the oil pan 1, allowing free airflow at the second end. The airflow drive mechanism is connected to the first air cavity of the first cover 3 and can blow or draw air from the first air cavity. The cooling pipes 2 are preferably made of a material with good thermal conductivity.

[0041] The cooling device of the present invention, in use, blows or draws air into the first air chamber via an airflow drive mechanism. The first air chamber is essentially sealed except at the connection point between it and the cooling pipe 2 and the airflow drive mechanism, creating a negative or positive pressure within the first air chamber. This allows air to enter the cooling pipe 2 from the second port and exit from the first port, or vice versa. Heat exchange occurs between the cooling pipe 2 and the lubricating oil in the oil pan 1. The wall thickness of the cooling pipe 2 is 0.2–2.0 mm, much smaller than the wall thickness of the oil pan 1 (typically 10 mm), thus enabling better heat exchange. Compared to existing methods of heat dissipation from outside the oil pan 1, the cooling pipe 2 significantly increases the contact area with the lubricating oil, thereby improving the heat dissipation efficiency of the oil pan 1. Furthermore, the device is simple in structure and easy to use.

[0042] See Figures 1 to 6 The present invention will be further illustrated by the following specific embodiments:

[0043] Example 1:

[0044] See Figures 1 to 5This is a structural schematic diagram of Embodiment 1. In this embodiment, see... Figure 1 As a preferred design, the internal cooling mechanism includes multiple cooling pipes 2, which are straight pipes and independent of each other. The first end of each cooling pipe 2 is connected to a first air chamber, allowing air to circulate through all cooling pipes 2 simultaneously. The number of cooling pipes 2 can be set according to actual needs, for example, eight pipes. Preferably, the total surface area of ​​the multiple cooling pipes 2 is close to the inner surface area of ​​the oil pan 1, thereby improving the heat dissipation efficiency by at least 100%. The straight pipe design of the cooling pipes 2 also facilitates the removal of lint. Since the area around the sewing machine is full of lint, if lint gets into the cooling pipe 2, it can be cleaned directly by inserting a brush into the cooling pipe 2.

[0045] See Figure 1 and Figure 2 In this embodiment, cooling pipes 2 are provided at multiple different positions along the height of the oil pan 1, meaning that multiple layers of cooling pipes 2 are provided along the height of the oil pan 1 to cool lubricating oil at different heights. Preferably, the cooling pipes 2 are inclined within the oil pan 1, meaning the first and second ports are located at different heights within the oil pan 1. The cooling pipes 2 can be parallel to each other, with their axes perpendicular to or slightly inclined to the flow direction of the lubricating oil within the oil pan 1. This arrangement creates turbulent flow of the lubricating oil, improving heat dissipation efficiency.

[0046] In this embodiment, see Figure 2 and Figure 4 As a preferred design, it also includes a second cover 5, which is disposed on the outer wall of the oil pan 1 and forms a second air chamber with the oil pan 1. The second ports of all cooling pipes 2 are connected to the second air chamber. The second cover 5 is provided with multiple second vents 51. The second vents 51 adopt a smaller aperture so that the second cover 5 has the function of a filter screen, reducing the amount of lint entering the cooling pipes 2 from the second ports.

[0047] In this embodiment, see Figure 1 and Figure 5As a preferred design, both ends of the cooling pipe 2 are connected to the side wall of the oil pan 1 via a connecting structure. This connecting structure includes a sealing gasket 7, a nut 6, a connecting pipe 8, a rubber tube 9, and a clamp 10. The connecting pipe 8 passes through the side wall of the oil pan 1 and is equipped with a limiting ring for pressing against the inner wall of the oil pan 1. The sealing gasket 7 is positioned between the limiting ring and the inner wall of the oil pan 1. The nut 6 is screwed onto the connecting pipe 8 and pressed against the outer wall of the oil pan 1, thus pressing the limiting ring against the sealing gasket 7 to create a seal and prevent lubricating oil leakage between the connecting pipe 8 and the side wall of the oil pan 1. The rubber tube 9 is fitted onto the connecting pipe 8, and the end of the cooling pipe 2 is fitted onto the rubber tube 9. The clamp 10 secures the cooling pipe 2 to the connecting pipe 8, and the rubber tube 9 seals the gap between the cooling pipe 2 and the connecting pipe 8. The two ends of the cooling pipe 2 are fixed and sealed to the oil pan 1 through the connecting structure. The cooling pipe 2 is installed stably, and no additional fixing structure is needed for the pipe body and the oil pan 1, which reduces the impact on the lubricating oil.

[0048] In this embodiment, see Figure 1 and Figure 5 As a preferred design, both ends of the cooling pipe 2 are provided with variable diameter sections with gradually decreasing inner diameters, and the inner diameter of the port is the smallest. That is, the variable diameter section gradually decreases from the side near the middle to the side of the port, and the inner diameter of the port is smaller than the inner diameter of the main body of the cooling pipe 2. By setting the variable diameter section, the air can be made to be in a turbulent state, thereby improving the heat dissipation efficiency.

[0049] In this embodiment, see Figure 1 and Figure 5 As a preferred design, the first housing 3 is provided with a first vent 31, and the air circulation drive mechanism includes a fan 4 disposed in the first vent 31. By driving the rotation of the fan 4, air is blown or drawn into the first air chamber. In other embodiments, the air circulation drive may also adopt other suitable structures.

[0050] Example 2:

[0051] See Figure 6 This is a structural schematic diagram of Embodiment 2. See also... Figure 6 In this embodiment, as a preferred design, the internal cooling mechanism uses a single cooling pipe 2, thereby reducing the number of openings on the side wall of the oil pan 1. The cooling pipe 2 is bent inside the oil pan 1 to ensure the contact area with the lubricating oil and to ensure heat dissipation efficiency.

[0052] In this embodiment, as a preferred design, the cooling pipe 2 includes multiple working straight pipe sections 21 and connecting bend sections 22 connecting the working straight pipe sections 21. The working straight pipe sections 21 can all be along the length direction of the oil pan 1 or along the width direction of the oil pan 1 to ensure the contact area with the lubricating oil. Furthermore, the working straight pipe sections 21 are inclined in the oil pan 1, with the first port and the second port located at different heights in the oil pan 1. The axis of the cooling pipe 2 can be set to be perpendicular to or slightly inclined to the flow direction of the lubricating oil in the oil pan 1. In this way, the lubricating oil at different heights is cooled evenly, and the lubricating oil can be in a turbulent state, improving the heat dissipation efficiency.

[0053] In this embodiment, since there is only one cooling pipe 2, the second cover 5 is not required; a filter can be provided only at the second port, simplifying the mechanism. Of course, a second cover 5 can also be provided. The other parts of the cooling device in this embodiment are the same as those in Embodiment 1 above, and will not be described in detail again.

[0054] As can be seen from the above, the cooling device of the present invention has the following beneficial effects:

[0055] 1. Through the internal cooling mechanism, the first cover 3 and the air circulation drive mechanism, the air circulation drive mechanism and the first cover 3 directly introduce flowing air into the cooling pipe 2 set in the oil pan 1. The cooling pipe 2 exchanges heat with the lubricating oil in the oil pan 1, which can greatly increase the heat exchange area with the lubricating oil. Moreover, the wall thickness of the cooling pipe 2 is much smaller than the wall thickness of the oil pan 1. Compared with the existing method of air cooling outside the oil pan 1, it can effectively improve the cooling effect.

[0056] 2. Compared to the method of directly mounting the fan at the bottom of the oil pan 1, the airflow in this application has a fixed flow channel, the fan power does not need to be too high, and the noise will be relatively low.

[0057] 3. The cooling pipe is set at an angle or in multiple layers in the oil pan 1, which can uniformly cool the lubricating oil at different heights and make the lubricating oil turbulent, thus improving the heat dissipation efficiency.

[0058] In summary, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0059] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A cooling device for an oil pan in a sewing machine, characterized by: The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism.

2. Cooling device according to claim 1, characterized in that The cooling mechanism includes a plurality of straight cooling pipes (2).

3. Cooling device according to claim 2, characterized in that: The cooling pipes (2) are arranged at different heights of the oil pan (1).

4. Cooling device according to claim 2, characterized in that: The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1).

5. The cooling device of claim 2, wherein: The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism.

6. The cooling device of claim 1, wherein: The cooling mechanism includes a plurality of straight cooling pipes (2).

7. The cooling device of claim 1, wherein: The cooling pipes (2) are arranged at different heights of the oil pan (1).

8. The cooling device of claim 1, wherein: The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1).

9. The cooling device of claim 1, wherein: The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism.

10. The cooling device of claim 1, wherein: The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a plurality of straight cooling pipes (2). The cooling pipes (2) are arranged at different heights of the oil pan (1). The cooling pipes (2) are arranged in the oil pan (1) in an inclined manner, and the first and second ports are located at different heights of the oil pan (1). The oil pan (1) is internally cooled by a cooling mechanism, a first cover (3) and an air flow driving mechanism. The cooling mechanism includes a

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