Sewing machine

Abstract

The application relates to the technical field of sewing equipment, in particular to a sewing machine. The sewing machine comprises a machine shell, a differential ratio adjusting slide rod and an oil-proof device. The machine shell is provided with a first mounting hole. The differential ratio adjusting slide rod extends into the first mounting hole and is connected with the oil-proof device. The oil-proof device comprises an oil pump which is mounted on the machine shell. One end of an oil suction mechanism is connected with the oil pump. An oil storage mechanism comprises an oil storage unit and an oil seal assembly. The oil storage unit is stacked on the machine shell. The oil storage unit is provided with a second mounting hole and an oil storage groove which are in communication with each other. The first mounting hole and the second mounting hole are arranged in a vertical direction and are in communication. The oil seal assembly extends into the first mounting hole and is sleeved on the differential ratio adjusting slide rod. The oil seal assembly is limited in the second mounting hole in the vertical direction and seals the second mounting hole. The other end of the oil suction mechanism extends into the oil storage groove. The oil storage groove of the oil-proof device is used for storing excessive lubricating oil on the differential ratio adjusting slide rod, so that sufficient oil return time is ensured, and oil seepage caused by excessive oil is avoided.

Description

Technical Field

[0001] This application relates to the field of sewing equipment technology, and in particular to a sewing machine. Background Technology

[0002] Sewing machines are primarily used as mechanical devices for sewing fabrics, leather, and other materials. They typically require differential ratio adjustment to meet the needs of different fabrics or sewing techniques. The differential ratio is generally adjusted by reciprocating the differential ratio adjustment slider up and down or left and right. During this process, a large amount of lubricating oil is usually supplied to the differential ratio adjustment slider to ensure smooth operation.

[0003] However, existing sewing machines are not equipped with corresponding oil storage devices. When a large amount of lubricating oil accumulates and cannot be returned in time, the accumulated oil seeps out along the slide bar during the reciprocating swing of the differential ratio adjustment slide bar, causing the fabric to be sewn to be stained with oil, affecting the sewing quality and production efficiency. Utility Model Content

[0004] Therefore, it is necessary to provide a sewing machine that can store lubricating oil on the differential ratio adjustment slide bar, ensuring sufficient oil return time, thereby improving sewing quality and production efficiency.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0006] A sewing machine includes a machine housing, a differential ratio adjusting slide rod, and an oil-proof device. The output end of the machine housing has a first mounting hole. The differential ratio adjusting slide rod extends into the first mounting hole and is connected to the oil-proof device. The oil-proof device includes:

[0007] Oil pump, installed in the housing;

[0008] An oil suction mechanism, one end of which is connected to the oil pump;

[0009] An oil storage mechanism includes an oil storage unit and an oil seal assembly. The oil storage unit is stacked on the output end along the height direction of the housing. In the width direction of the housing, the oil storage unit has a second mounting hole and an oil storage tank that are interconnected. The first mounting hole and the second mounting hole are arranged vertically and communicate with each other in the height direction of the housing. The oil seal assembly extends into the first mounting hole and is sleeved and fixed to the differential ratio adjusting slide rod. In the height direction of the housing, it is limited to the second mounting hole and seals the second mounting hole. The other end of the oil suction mechanism extends into the oil storage tank.

[0010] Understandably, this application, by setting up an oil suction mechanism and an oil storage mechanism, stacks the oil storage unit at the output end, and sleeves and fixes the oil seal assembly, which extends into the first mounting hole and is confined within the second mounting hole, onto the differential ratio adjusting slide rod. This allows the lubricating oil at the differential ratio adjusting slide rod to be guided through the oil seal assembly and flow from the first and second mounting holes into the oil storage tank. In this way, the oil storage tank can store the lubricating oil on the differential ratio adjusting slide rod at the output end, avoiding oil leakage due to excessive oil volume. Furthermore, by extending the other end of the oil suction mechanism into the oil storage tank, the lubricating oil stored in the oil storage tank can be promptly returned through the oil suction mechanism. At the same time, the oil seal assembly seals the second mounting hole in the height direction of the machine housing, preventing the lubricating oil stored in the oil storage tank from seeping down through the second mounting hole, further preventing oil leakage and improving the sewing quality and production efficiency of the sewing machine.

[0011] In one embodiment, the oil seal assembly includes a first oil seal and a second oil seal, which are stacked vertically along the height direction of the housing. A portion of the first oil seal extends into the first mounting hole and extends to the upper opening of the second mounting hole. In the height direction of the housing, the end of the second oil seal away from the first oil seal is fixed to the oil storage unit and seals the second mounting hole.

[0012] Understandably, this setup allows the lubricating oil on the differential ratio adjusting slide rod to flow from the upper opening of the second mounting hole into the oil reservoir using the first oil seal, thus storing the lubricating oil. The second oil seal, stacked alongside the first oil seal along the height of the machine casing, prevents further seepage of lubricating oil as it seeps through the connection between the first and differential ratio adjusting slide rods. This double-layer oil seal structure creates a double-layer anti-seepage structure at the connection between the oil storage mechanism and the differential ratio adjusting slide rod, thereby improving the sewing machine's anti-seepage performance and enhancing its sewing quality.

[0013] In one embodiment, the first oil seal has a first mounting section and a first guide section connected to each other. Along the height direction of the housing, the first mounting section is disposed above the first guide section, and the first mounting section is sleeved and abuts against the outer peripheral wall of the differential ratio adjusting slide rod to seal against the outer peripheral wall of the differential ratio adjusting slide rod. The end of the first guide section away from the first mounting section extends into the first mounting hole and extends to the upper opening.

[0014] Understandably, the first mounting section is designed to connect and seal with the differential ratio adjusting slide rod to prevent lubricating oil from seeping down from the connection between the first oil seal and the differential ratio adjusting slide rod. The first guide section also guides the lubricating oil on the differential ratio adjusting slide rod to flow from the upper opening of the second mounting hole into the oil reservoir, thus storing excess lubricating oil and allowing sufficient time for oil to return from the oil suction mechanism.

[0015] In one embodiment, in the height direction of the housing, the cross-sectional diameter of the first guide segment gradually increases from near to far from the connection point of the first mounting segment.

[0016] Understandably, this configuration creates a guide surface that slopes towards the oil reservoir, thereby guiding the lubricating oil on the differential ratio adjusting slide bar to flow from the upper opening of the second mounting hole into the oil reservoir.

[0017] In one embodiment, the second oil seal has a second mounting section, a second guide section, and a sealing section. Along the height direction of the housing, one end of the second guide section is connected to the second mounting section, and the other end is connected to the sealing section. The second mounting section is sleeved on and abuts against the outer peripheral wall of the differential ratio adjusting slide rod to seal against the outer peripheral wall of the differential ratio adjusting slide rod. The sealing section covers the lower opening of the second mounting hole in the height direction of the housing and is pressed into the oil storage unit to seal the lower opening of the second mounting hole.

[0018] The first oil seal is disposed on the second mounting section in the height direction of the housing.

[0019] Understandably, the second mounting section is designed to connect and seal the second oil seal with the differential ratio adjusting slide rod, preventing lubricating oil that has seeped from the connection between the first oil seal and the differential ratio adjusting slide rod from further seeping down. Combined with the first oil seal, it forms a double anti-oil-seepage structure at the connection between the oil seal assembly and the differential ratio adjusting slide rod. The second guiding section further guides the lubricating oil, allowing it to enter the oil reservoir for storage. The sealing section seals the second mounting hole in the height direction of the housing, preventing lubricating oil from seeping down from the second mounting hole connected to the oil reservoir. This further ensures the sealing performance of the connection between the differential ratio adjusting slide rod and the oil-proof device. Furthermore, it forms a structure at the positions of the first and second mounting holes that assists in oil storage in the oil reservoir, increasing the oil storage capacity of the oil-proof device.

[0020] In one embodiment, in the height direction of the housing, the cross-sectional diameter of the sealing section is greater than the cross-sectional diameter of the second guide section.

[0021] Understandably, this configuration creates a guide surface that slopes towards the oil reservoir, thereby guiding the lubricating oil on the differential ratio adjusting slide bar to flow from the second mounting hole into the oil reservoir.

[0022] In one embodiment, the oil storage unit includes a sealing gasket and a base, with the sealing gasket disposed between the base and the housing along the height direction of the housing.

[0023] Understandably, the sealing gasket increases the seal between the base and the output end of the housing, thereby preventing lubricating oil from leaking from the connection between the base and the output end, reducing hard contact between the base and the housing, and minimizing structural damage.

[0024] In one embodiment, the oil storage unit further includes a sealing gasket plate, which is disposed between the sealing gasket and the base, and is stacked with the sealing gasket and the base to form the oil storage groove and the second mounting hole;

[0025] The sealing section is fixed at one end of the housing away from the second guide section in the height direction between the sealing gasket plate and the base.

[0026] Understandably, the sealing gasket pressure plate is designed to engage with the base and limit and fix the sealing section of the second oil seal.

[0027] In one embodiment, the oil storage mechanism further includes an oil-soaked cotton ball disposed in the oil storage tank, and the oil suction mechanism abuts against the oil-soaked cotton ball.

[0028] Understandably, the oil-absorbing cotton can absorb and store the lubricating oil in the oil storage tank, thereby increasing the oil storage capacity of the oil-proof device. The oil suction mechanism abuts against the oil-absorbing cotton, allowing the lubricating oil in the oil-absorbing cotton to return through the oil suction mechanism.

[0029] In one embodiment, the oil suction mechanism includes an oil pipe and an oil suction pipe. One end of the oil pipe is connected to the oil pump, and the other end is connected to the oil suction pipe. The end of the oil suction pipe away from the oil pipe extends into the oil storage tank and abuts against the oil cotton.

[0030] Compared with existing technologies, the sewing machine described above incorporates an oil suction mechanism and an oil storage mechanism. The oil storage unit is stacked at the output end, and an oil seal assembly, extending into the first mounting hole and confined within the second mounting hole, is fitted and fixed to the differential ratio adjusting slide rod. This allows the lubricating oil at the differential ratio adjusting slide rod to be guided through the oil seal assembly, flowing from the first and second mounting holes into the oil storage tank. This effectively stores the lubricating oil on the differential ratio adjusting slide rod at the output end, preventing oil leakage due to excessive oil volume. Furthermore, by extending the other end of the oil suction mechanism into the oil storage tank, the lubricating oil stored in the tank can be promptly returned through the suction mechanism. Simultaneously, the oil seal assembly seals the second mounting hole along the height of the machine casing, preventing the lubricating oil stored in the oil storage tank from seeping down through the second mounting hole, further preventing oil leakage and improving the sewing quality and production efficiency of the sewing machine. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a structural diagram of the sewing machine provided in this application.

[0033] Figure 2 This is a structural diagram of the sewing machine provided in this application, omitting the machine casing.

[0034] Figure 3 This is an enlarged structural diagram of the part of the sewing machine near the oil-proof device provided in this application.

[0035] Figure 4 A schematic diagram of the mechanism of a sewing machine in one embodiment provided in this application.

[0036] Figure 5 Provided for this application Figure 4 A schematic diagram of the cross-sectional structure at point AA.

[0037] Figure 6 Provided for this application Figure 5 A magnified structural diagram at point B in the middle.

[0038] Figure 7 This is a schematic diagram of the exploded structure of the oil storage mechanism provided in this application.

[0039] The component labels are as follows:

[0040] 100. Oil prevention device; 10. Oil pump; 20. Oil suction mechanism; 21. Oil pipe; 22. Oil suction pipe; 30. Oil storage mechanism; 31. Oil storage unit; 311. Second mounting hole; 3111. Upper opening; 3112. Lower opening; 312. Oil storage tank; 313. Sealing gasket; 314. Base; 315. Sealing gasket pressure plate; 32. Oil seal assembly; 321. First oil seal; 3211. First mounting section; 3212. First guide section; 322. Second oil seal; 3221. Second mounting section; 3222. Second guide section; 3223. Sealing section; 33. Oil cotton; 40. Connector; 41. Connecting hole;

[0041] 200. Sewing machine; 201. Machine housing; 2011. Output end; 2012. First mounting hole; 202. Differential ratio adjustment slide bar; 2021. Outer peripheral wall; 203. Slide bar seat. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0043] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0047] Please see Figures 1 to 6 This application provides a sewing machine 200, which is mainly used to store and return excess lubricating oil on the differential ratio adjusting slide 202, so as to prevent lubricating oil from accumulating at the connection structure between the differential ratio adjusting slide 202 and the machine housing 201 and seeping down, causing oil stains on the fabric to be sewn, thereby improving the sewing quality, reducing the time cost of changing fabric or cleaning oil stains, and improving sewing efficiency.

[0048] Specifically, the sewing machine 200 includes a housing 201, a differential ratio adjusting slide rod 202, and an oil-proof device 100. The output end 2011 of the housing 201 is provided with a first mounting hole 2012. The differential ratio adjusting slide rod 202 extends into the first mounting hole 2012 and is connected to the oil-proof device 100. The oil-proof device 100 includes an oil pump 10, an oil suction mechanism 20, and an oil storage mechanism 30. The oil pump 10 is mounted on the housing 201. One end of the oil suction mechanism 20 is connected to the oil pump 10. The oil storage mechanism 30 includes an oil storage unit 31 and an oil seal assembly 32. The oil storage unit 31 extends along the edge of the housing 201... The oil storage unit 31 is stacked on the output end 2011 in the height direction z, and in the width direction x of the housing 201, the oil storage unit 31 has a second mounting hole 311 and an oil storage tank 312 that are interconnected. The first mounting hole 2012 and the second mounting hole 311 are set vertically and connected in the height direction z of the housing 201. The oil seal assembly 32 extends into the first mounting hole 2012 and is sleeved and fixed to the differential ratio adjusting slide rod 202. In the height direction z of the housing 201, it is limited to the second mounting hole 311 and seals the second mounting hole 311. The other end of the oil suction mechanism 20 extends into the oil storage tank 312.

[0049] It should be explained that existing sewing machine 200s generally have a seal at the connection between the housing 201 and the differential ratio adjusting slide 202 to ensure the sealing of the connection and prevent the lubricating oil used to lubricate the differential ratio adjusting slide 202 from seeping down the slide 202 and onto the fabric to be sewn, thus staining the fabric with oil. However, with this structure, if the oil return is not timely, and there is too much oil accumulating at the connection between the housing 201 and the differential ratio adjusting slide 202, a single seal is still insufficient to prevent the lubricating oil from seeping down, thus affecting the sewing quality. If sewing is only started after the oil has returned, the sewing efficiency is also affected. This application, by setting up an oil suction mechanism 20 and an oil storage mechanism 30, stacks the oil storage unit 31 on the output end 2011, and sleeves and fixes the oil seal assembly 32, which extends into the first mounting hole 2012 and is confined within the second mounting hole 311, onto the differential ratio adjusting slide rod 202. This allows the lubricating oil at the differential ratio adjusting slide rod 202 to be guided through the oil seal assembly 32 and flow from the first mounting hole 2012 and the second mounting hole 311 into the oil storage tank 312. In this way, the lubricating oil on the differential ratio adjusting slide rod 202 located at the output end 2011 can be stored in the oil storage tank 312. This design prevents excessive oil accumulation at the connection point between the differential ratio adjustment slide 202 and the housing 201, thus avoiding oil leakage. By extending the other end of the oil suction mechanism 20 into the oil storage tank 312, the lubricating oil stored in the oil storage tank 312 can be returned to the machine in a timely manner through the oil suction mechanism 20. At the same time, the oil seal assembly 32 seals the second mounting hole in the height direction z of the housing 201, preventing the lubricating oil stored in the oil storage tank 312 from seeping down through the second mounting hole 311, further preventing oil leakage and improving the sewing quality and efficiency of the sewing machine 200.

[0050] Here, the height direction z and width direction x of the sewing machine 200 are used as a reference for the relative directions, but the structural settings are not limited to a single height direction z or a single width direction x.

[0051] like Figure 2 and Figure 3 As shown, the oil suction mechanism 20 includes an oil pipe 21 and an oil suction pipe 22. One end of the oil pipe 21 is connected to the oil pump 10, and the other end is connected to the oil suction pipe 22. The end of the oil suction pipe 22 away from the oil pipe 21 extends into the oil storage tank 312. With this configuration, the lubricating oil stored in the oil storage tank 312 can be drawn in through the oil suction pipe 22 and returned to the oil pump 10 through the oil pipe 21, ready to be used again to lubricate the differential ratio adjusting slide bar 202.

[0052] like Figures 3 to 6As shown, in the height direction z of the housing 201, the second mounting hole 311 has an upper opening 3111 and a lower opening 3112 that are arranged opposite to each other. The upper opening 3111 is located near the first mounting hole 2012 and communicates with the first mounting hole 2012, while the lower opening 3112 is located away from the first mounting hole 2012.

[0053] Please continue to refer to this. Figures 2 to 6 The oil storage unit 31 includes a sealing gasket 313 and a base 314. Along the height direction z of the housing 201, the sealing gasket 313 is disposed between the base 314 and the housing 201. In this way, the sealing gasket 313 can increase the sealing performance between the base 314 and the output end of the housing 201, thereby preventing lubricating oil from leaking from the connection between the base 314 and the output end 2011, and reducing hard contact between the base 314 and the housing 201, thus reducing the occurrence of structural damage.

[0054] Here, the sealing gasket 313 can be made of materials such as nitrile rubber, polyurethane, or polytetrafluoroethylene, which have properties such as resistance to lubricating oil, wear resistance, elastic deformation force, and sealing performance. Of course, it is not limited to these, and the specific material of the sealing gasket 313 can be determined according to the actual situation.

[0055] Furthermore, the oil storage unit 31 also includes a sealing gasket plate 315, which is disposed between the sealing gasket 313 and the base 314, and is stacked with the sealing gasket 313 and the base 314 to form an oil storage groove 312 and a second mounting hole 311; the oil seal assembly 32 is located at one end in the height direction z of the housing 201 between the sealing gasket plate 315 and the base 314.

[0056] In one embodiment, the lower opening 3112 of the second mounting hole 311 is located between the sealing gasket plate 315 and the base 314.

[0057] Please continue to refer to this. Figures 3 to 7The oil seal assembly 32 includes a first oil seal 321 and a second oil seal 322. The first oil seal 321 and the second oil seal 322 are stacked vertically along the height direction z of the housing 201. A portion of the first oil seal 321 extends into the first mounting hole 2012 and extends to the upper opening 3111 of the second mounting hole 311. In the height direction z of the housing 201, the end of the second oil seal 322 away from the first oil seal 321 is fixed to the oil storage unit 31 and seals the second mounting hole 311. This configuration allows the lubricating oil on the differential ratio adjusting slide bar 202 to flow from the upper opening 3111 of the second mounting hole 311 into the oil storage tank via the first oil seal 321. The oil storage tank 312 can then store the lubricating oil. A second oil seal 322 is also provided, stacked with the first oil seal 321 along the height z of the housing 201. This prevents further seepage of lubricating oil as it seeps through the connection between the first oil seal 321 and the differential ratio adjusting slide bar 202. This double-layer oil seal structure creates a double-layer anti-seepage structure at the connection between the oil storage mechanism 30 and the differential ratio adjusting slide bar 202, thereby improving the anti-seepage performance of the sewing machine 200 and enhancing its sewing quality.

[0058] Specifically, the first oil seal 321 has a first mounting section 3211 and a first guide section 3212 connected to each other. Along the height direction z of the housing 201, the first mounting section 3211 is positioned above the first guide section 3212, and the first mounting section 3211 is sleeved on and abuts against the outer peripheral wall of the differential ratio adjusting slide rod 202 to seal with the outer peripheral wall 2021 of the differential ratio adjusting slide rod 202. The end of the first guide section 3212 away from the first mounting section 3211 extends into the first mounting hole 2012 and extends to the upper opening 3111. Thus, the first mounting section 3211 is designed to connect and seal with the differential ratio adjusting slide bar 202, preventing lubricating oil from seeping down from the connection between the first oil seal 321 and the differential ratio adjusting slide bar 202. Furthermore, the first guide section 3212 guides the lubricating oil on the differential ratio adjusting slide bar 202 to flow from the upper opening 3111 of the second mounting hole 311 into the oil storage tank 312, thereby storing excess lubricating oil and allowing sufficient time for oil to return from the oil suction mechanism 20.

[0059] Furthermore, in the height direction z of the housing 201, the cross-sectional diameter of the first guide section 3212 gradually increases from near to far from the connection point of the first mounting section 3211. This arrangement forms a guide surface inclined towards the oil reservoir 312, thereby guiding the lubricating oil on the differential ratio adjusting slide bar 202 to flow from the upper opening 3111 of the second mounting hole 311 into the oil reservoir 312.

[0060] In one embodiment, the second oil seal 322 has a second mounting section 3221, a second guide section 3222, and a sealing section 3223. Along the height direction z of the housing 201, one end of the second guide section 3222 is connected to the second mounting section 3221, and the other end is connected to the sealing section 3223. The second mounting section 3221 is sleeved and abuts against the outer peripheral wall 2021 of the differential ratio adjusting slide rod 202 to seal against the outer peripheral wall 2021. The sealing section 3223 covers the lower opening 3112 of the second mounting hole 311 and presses between the sealing gasket plate 315 and the base 314 to seal the lower opening 3112 of the second mounting hole 311. The first oil seal 321 covers the second mounting section 3221 along the height direction z of the housing 201. Thus, the second mounting section 3221 is used to connect and seal the second oil seal 322 with the differential ratio adjusting slide rod 202 to prevent the lubricating oil that has seeped down from the connection between the first oil seal 321 and the differential ratio adjusting slide rod 202 from seeping down further. Combined with the first oil seal 321, it forms a double anti-oil leakage structure at the connection between the oil seal assembly 32 and the differential ratio adjusting slide rod 202. The second guiding section 3222 can further guide the lubricating oil so that it can enter the oil storage tank 312 for storage. The sealing section 3223 is used to seal the second mounting hole 311 in the height direction z of the housing 201, which can prevent the lubricating oil from seeping down from the second mounting hole 311 that communicates with the oil storage tank 312. This further ensures the sealing performance of the connection between the differential ratio adjusting slide rod 202 and the oil prevention device 100. A structure that can assist the oil storage tank 312 in storing oil is formed at the positions of the first mounting hole 2012 and the second mounting hole 311, increasing the oil storage capacity of the oil prevention device 100.

[0061] Here, the sealing section 3223 is installed at the lower opening 3112 of the second mounting hole 311 to seal the lower opening 3112 in the height direction z of the housing 201. This allows the second mounting hole 311 to form a larger oil storage space by combining with the first mounting hole 2012 and the oil reservoir 312. That is, the cross-sectional diameter of the sealing section 3223 in its circumferential direction is larger than the cross-sectional diameter of the lower opening 3112 of the second mounting hole 311 in the circumferential direction.

[0062] Furthermore, in the height direction z of the housing 201, the cross-sectional diameter of the sealing section 3223 is larger than the cross-sectional diameter of the second guide section 3222. This arrangement creates a guide surface inclined towards the oil reservoir 312, thereby guiding the lubricating oil on the differential ratio adjusting slide 202 to flow from the second mounting hole 311 into the oil reservoir 312.

[0063] In one embodiment, the sealing section 3223 is fixed at one end of the housing 201 away from the second guide section 3222 in the height direction z between the sealing gasket plate 315 and the base 314.

[0064] like Figure 7As shown, the oil storage mechanism 30 also includes an oil cotton 33, which is disposed in the oil storage tank 312. The end of the oil suction pipe 22 away from the oil pipe 21 abuts against the oil cotton 33. It can be understood that the oil cotton 33 can absorb and store the lubricating oil in the oil storage tank 312 to further increase the oil storage capacity of the oil prevention device 100, and the oil suction pipe 22 abuts against the oil cotton 33 so that the lubricating oil in the oil cotton 33 can be returned through the oil suction pipe 22.

[0065] The working principle of the oil-proof device 100 in this application is as follows:

[0066] When the lubricating oil flows downwards along the height z of the housing 201 from the differential ratio adjusting slide 202, most of the lubricating oil is guided to the oil reservoir 312 through the first guide section 3212 of the first oil seal 321. Thus, when there is excessive lubricating oil causing oil accumulation, it is stored in the oil reservoir 312, allowing the oil suction pipe 22 sufficient time to draw in oil and return it to the oil pump 10 via the oil pipe 21. This facilitates the reuse of lubricating oil and solves the problem of oil leakage caused by excessive oil volume. When the differential ratio adjusting slide 202 swings, if a small portion of the lubricating oil flows down through the connection between the first oil seal 321 and the differential ratio adjusting slide 202, this portion of lubricating oil will also flow to the oil reservoir 312 through the second guide section 3222 of the second oil seal 322, awaiting return from the oil suction mechanism 20. Here, some of the lubricating oil entering the oil reservoir 312 is also stored by the oil cotton 33 to increase the oil storage capacity.

[0067] like Figure 1 and Figure 2 As shown, the oil-proof device 100 also includes a connector 40, and both the oil storage mechanism 30 and the output end 2011 of the housing 201 have a connection hole 41. The oil storage mechanism 30 can be connected to the output end 2011 by extending into the connection hole 41 through the connector 40.

[0068] Furthermore, the differential ratio adjusting slide bar 202 has a slide bar seat 203, and the oil suction pipe 22 is connected and fixed to the slide bar seat 203 through the connector 40, so as to increase the structural stability of the oil suction pipe 22.

[0069] In this embodiment, the connector 40 adopts a screw structure. Of course, it is not limited to this, and the specific configuration of the connector 40 can be determined according to the actual situation.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A sewing machine, comprising a machine housing, a differential ratio adjusting slide rod, and an oil-proof device, wherein the output end of the machine housing is provided with a first mounting hole, and the differential ratio adjusting slide rod extends into the first mounting hole and is connected to the oil-proof device, characterized in that, The oil-proof device includes: Oil pump, installed in the housing; An oil suction mechanism, one end of which is connected to the oil pump; An oil storage mechanism includes an oil storage unit and an oil seal assembly. The oil storage unit is stacked on the output end along the height direction of the housing. In the width direction of the housing, the oil storage unit has a second mounting hole and an oil storage tank that are interconnected. The first mounting hole and the second mounting hole are arranged vertically and communicate with each other in the height direction of the housing. The oil seal assembly extends into the first mounting hole and is sleeved and fixed to the differential ratio adjusting slide rod. In the height direction of the housing, it is limited to the second mounting hole and seals the second mounting hole. The other end of the oil suction mechanism extends into the oil storage tank.

2. The sewing machine according to claim 1, characterized in that, The oil seal assembly includes a first oil seal and a second oil seal, which are stacked vertically along the height direction of the housing. A portion of the first oil seal extends into the first mounting hole and extends to the upper opening of the second mounting hole. In the height direction of the housing, the end of the second oil seal away from the first oil seal is fixed to the oil storage unit and seals the second mounting hole.

3. The sewing machine according to claim 2, characterized in that, The first oil seal has a first mounting section and a first guide section connected to each other. Along the height direction of the housing, the first mounting section is positioned above the first guide section, and the first mounting section is sleeved on and abuts against the outer peripheral wall of the differential ratio adjusting slide rod to form a sealing fit with the outer peripheral wall of the differential ratio adjusting slide rod. The end of the first guide section away from the first mounting section extends into the first mounting hole and extends to the upper opening.

4. The sewing machine according to claim 3, characterized in that, In the height direction of the housing, the cross-sectional diameter of the first guide segment gradually increases from near to far from the connection point of the first mounting segment.

5. The sewing machine according to claim 2, characterized in that, The second oil seal has a second mounting section, a second guide section, and a sealing section. Along the height direction of the housing, one end of the second guide section is connected to the second mounting section, and the other end is connected to the sealing section. The second mounting section is sleeved on and abuts against the outer peripheral wall of the differential ratio adjusting slide rod to seal against the outer peripheral wall of the differential ratio adjusting slide rod. The sealing section covers the lower opening of the second mounting hole in the height direction of the housing and is pressed into the oil storage unit to seal the lower opening of the second mounting hole. The first oil seal is disposed on the second mounting section in the height direction of the housing.

6. The sewing machine according to claim 5, characterized in that, In the height direction of the housing, the cross-sectional diameter of the sealing section is larger than the cross-sectional diameter of the second guide section.

7. The sewing machine according to claim 5, characterized in that, The oil storage unit includes a sealing gasket and a base, with the sealing gasket disposed between the base and the housing along the height direction of the housing.

8. The sewing machine according to claim 7, characterized in that, The oil storage unit also includes a sealing gasket plate, which is disposed between the sealing gasket and the base, and is stacked with the sealing gasket and the base to form the oil storage tank and the second mounting hole; The sealing section is fixed at one end of the housing away from the second guide section in the height direction between the sealing gasket plate and the base.

9. The sewing machine according to claim 1, characterized in that, The oil storage mechanism also includes an oil cotton, which is disposed in the oil storage tank, and the oil suction mechanism abuts against the oil cotton.

10. The sewing machine according to claim 9, characterized in that, The oil suction mechanism includes an oil pipe and an oil suction pipe. One end of the oil pipe is connected to the oil pump, and the other end is connected to the oil suction pipe. The end of the oil suction pipe away from the oil pipe extends into the oil storage tank and abuts against the oil cotton.

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