Sewing machine oil return structure and sewing machine

Abstract

The utility model relates to the technical field of sewing machines, in particular to a sewing machine oil return structure and a sewing machine. An oil return structure of a sewing machine is used for recycling lubricating oil on a needle bar in the sewing machine and comprises a machine shell and an oil pump, the needle bar can penetrate through the machine shell, an oil scraping piece and an oil return pipeline are arranged in the machine shell, and the oil scraping piece is used for scraping the lubricating oil on the needle bar into the oil return pipeline; the oil pump is installed on the machine shell and communicated with the oil return pipeline. The oil return pipeline is arranged in the machine shell, the problem that the oil return pipeline is prone to colliding and being pulled to be broken is solved, and the leakage risk when lubricating oil flows through the oil return pipeline can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewing machine technical field, in particular to a sewing machine oil return structure and a sewing machine. BACKGROUND

[0002] In the working process of the sewing machine, the needle bar needs to be reciprocated frequently. In order to ensure good lubrication between the needle bar and other parts and reduce friction loss, it is necessary to apply lubricating oil on the needle bar. However, if the lubricating oil is not recycled in time after use, it will cause waste of lubricating oil, and at the same time, it may accumulate oil stains inside the sewing machine, increasing the cleaning difficulty, and the excess lubricating oil may drop on the fabric being sewn, affecting the sewing quality and product appearance.

[0003] The sewing machine in the prior art recycles lubricating oil by using an oil return pipeline. One end of the oil return pipeline is connected to the vicinity of the needle bar for collecting lubricating oil, and the other end is connected to a recycling device such as an oil tank or an oil pump. The oil return pipeline is usually arranged outside the machine shell. Although this design can achieve the recycling of lubricating oil on the needle bar, since the oil return pipeline is exposed outside the machine shell, the oil return pipeline is easily affected by external forces such as collision and pulling, which may cause damage to the oil return pipeline and looseness at the connection of the oil return pipeline, thereby affecting the oil return function, and even causing lubricating oil leakage. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a sewing machine oil return structure and a sewing machine which can prevent the oil return pipeline from being affected by the outside.

[0005] To solve the above technical problems, the present application provides the following technical solutions:

[0006] A sewing machine oil return structure for recycling lubricating oil on a needle bar of a sewing machine, the sewing machine oil return structure comprising:

[0007] a machine shell through which the needle bar passes, the machine shell being provided with a lubricating oil scraping member and an oil return pipeline inside, the lubricating oil scraping member being used to scrape the lubricating oil on the needle bar and fall into the oil return pipeline;

[0008] an oil pump installed on the machine shell and in communication with the oil return pipeline.

[0009] It can be understood that by arranging the lubricating oil scraping member and the oil return pipeline inside the machine shell and making the oil return pipeline in communication with the oil pump, a complete needle bar lubricating oil recycling structure is formed. The lubricating oil on the needle bar is scraped by the lubricating oil scraping member and falls into the oil return pipeline, and the lubricating oil flows into the oil pump through the oil return pipeline, thereby achieving the recycling of the lubricating oil. By arranging the oil return pipeline inside the machine shell, the problem of breakage caused by collision and pulling of the oil return pipeline with external structures can be avoided, and the risk of leakage of the lubricating oil flowing through the oil return pipeline can be reduced.

[0010] In one of the embodiments, the oil return pipeline comprises a plurality of oil return branches, and the plurality of oil return branches are sequentially communicated.

[0011] In one of the embodiments, the oil return branches are formed in the form of drillings in the casing;

[0012] In one of the embodiments, each of the oil return branches comprises a drilling inlet, and a sealing member is connected to each of the drilling inlets for sealing.

[0013] In one of the embodiments, the sealing member comprises an oil plug screw or a plug.

[0014] In one of the embodiments, two adjacent oil return branches are arranged vertically.

[0015] In one of the embodiments, the oil scraping member is configured as an oil seal.

[0016] It can be understood that, by configuring the oil scraping member as an oil seal, the oil seal can not only efficiently scrape off the lubricating oil on the needle bar, but also form a tight seal between the needle bar and the casing, thereby effectively preventing the lubricating oil from leaking from the oil seal.

[0017] In one of the embodiments, a limiting sleeve is installed in the casing, and the limiting sleeve is configured to allow the needle bar to pass through.

[0018] In one of the embodiments, the limiting sleeve abuts against the oil seal, and is configured to limit the oil seal in the casing.

[0019] It can be understood that, by setting the limiting sleeve to position and fix the oil seal, the limiting sleeve can prevent the oil seal from shifting or rotating during the high-speed reciprocating movement of the needle bar, thereby ensuring that the oil seal can always scrape off the lubricating oil on the needle bar and play a good sealing role.

[0020] In one of the embodiments, the oil return structure of the sewing machine further comprises an oil nozzle and an oil pipe, the oil nozzle is installed on the casing, and is respectively communicated with the oil return pipeline and the oil pipe.

[0021] The oil pipe is connected and communicated with the oil pump at an end away from the oil nozzle.

[0022] It can be understood that, by increasing the design of the oil nozzle and the oil pipe, the lubricating oil can be delivered from the oil return pipeline to the oil pump.

[0023] In one of the embodiments, the oil pump is partially arranged in the casing.

[0024] The oil pipe partially extends out of the casing, and the part of the oil pipe extending out of the casing is connected and communicated with the oil pump.

[0025] Understandably, by placing the oil pump inside the machine casing, damage to the oil pump from external equipment can be reduced, lowering the risk of damage caused by external factors (such as collisions, pulling, etc.). Furthermore, this makes the sewing machine's structure more compact. An oil pipe extending partially out of the machine casing connects the return oil line to the oil pump, allowing lubricating oil to flow smoothly from the return oil line into the pump.

[0026] This application also provides the following technical solutions:

[0027] A sewing machine includes a sewing machine oil return structure as described in any of the above embodiments.

[0028] Compared to existing technologies, this invention creates a complete needle bar lubricant recovery structure by incorporating an oil scraper and a return oil line within the housing and connecting the return oil line to the oil pump. The oil scraper scrapes lubricant from the needle bar into the return oil line, where it flows back into the oil pump, thus achieving lubricant recovery. By placing the return oil line inside the housing, it avoids collisions and pulling with external structures that could lead to breakage, and reduces the risk of lubricant leakage as it flows through the return oil line. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the sewing machine oil return structure provided in this application.

[0031] Figure 2 For this application Figure 1 Sectional view at point AA.

[0032] Figure 3 For this application Figure 1 Sectional view at point BB.

[0033] Figure 4 This is a structural diagram of the sewing machine provided in this application.

[0034] The component labels are as follows:

[0035] 100. Sewing machine oil return structure; 10. Machine housing; 11. Oil scraper; 111. Oil seal; 12. Oil return pipeline; 121. Oil return branch; 122. Drill inlet; 123. Sealing component; 13. Limiting bushing; 20. Oil pump; 30. Oil nozzle; 40. Oil pipe;

[0036] 200 sewing machine; 210 needle bar; 220 rotation shaft; 230 sewing needle. DETAILED DESCRIPTION

[0037] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0038] It should be noted that when a component is referred to as being "fixed" or "set" on another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the description of the present application are for the purpose of illustration only and do not indicate the only implementation.

[0039] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0040] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is horizontally higher than the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is horizontally lower than the second feature.

[0041] Unless otherwise defined, all technical and scientific terms used in the application's specification have the same meaning as commonly understood by one of ordinary skill in the art to which the application belongs. The terminology used in the application's specification is for describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" includes any and all combinations of one or more of the associated listed items.

[0042] Referring to Figures 1 to 4 The sewing machine oil recovery structure 100 is used for recovering lubricating oil on the needle bar 210 of the sewing machine 200, and the sewing machine oil recovery structure 100 comprises a machine shell 10 and an oil pump 20. The machine shell 10 is provided with an oil scraping piece 11 and an oil return pipeline 12. The oil scraping piece 11 is used for scraping the lubricating oil on the needle bar 210 into the oil return pipeline 12. The oil pump 20 is installed on the machine shell 10 and communicates with the oil return pipeline 12. In this way, by setting the oil scraping piece 11 and the oil return pipeline 12 in the machine shell 10 and making the oil return pipeline 12 communicate with the oil pump 20, a complete oil recovery structure is formed. The lubricating oil on the needle bar 210 can be effectively scraped into the oil return pipeline 12 by the oil scraping piece 11, avoiding the waste of lubricating oil caused by dripping and the pollution of the sewing material. By setting the oil return pipeline 12 inside the machine shell 10, the problem of breakage caused by collision and pulling of the oil return pipeline 12 is avoided, and the risk of leakage of lubricating oil flowing through the oil return pipeline 12 is reduced. In addition, by integrating the sewing machine oil recovery structure 100 in the machine shell 10, the influence of external factors on the sewing machine oil recovery structure 100 can be effectively reduced, and the stability of the operation of the sewing machine oil recovery structure 100 is improved. Here, the oil scraping piece 11 can be configured as an oil seal 111, a rubber scraper, an oil scraping ring, etc.

[0043] In this embodiment, as Figure 1 The oil scraping piece 11 is configured as an oil seal 111. By configuring the oil scraping piece 11 as an oil seal 111, the oil seal 111 can not only effectively scrape the lubricating oil on the needle bar 210, but also form a tight seal between the needle bar 210 and the machine shell 10. The good sealing structure between the needle bar 210 and the machine shell 10 can effectively prevent the lubricating oil from leaking from the oil seal 111. It can be understood that the oil seal 111 has stable performance, which is beneficial to the long-term stable recovery of lubricating oil by the sewing machine oil recovery structure 100. The installation of the oil seal 111 is relatively simple, and the cost of replacing and maintaining the oil seal 111 is low.

[0044] As Figures 1 to 3As shown, the oil return pipeline 12 includes a plurality of oil return branches 121 which are sequentially communicated. Through the design of sequentially communicating the plurality of oil return branches 121, the flow of the lubricating oil from the needle bar 210 to the oil pump 20 is realized, and the design of the plurality of oil return branches 121 has strong flexibility, which can be reasonably arranged according to the actual space condition inside the sewing machine 200, so that the oil return pipeline 12 arranged inside the machine shell 10 can be applied to different models of the sewing machine 200. Here, the number of the oil return branches 121 can be configured as 4, 5, 6, etc.

[0045] In the embodiment, the oil return pipeline 12 includes 5 oil return branches 121.

[0046] In an embodiment, the oil return branches 121 are formed in the machine shell 10 in the form of drilled holes; each oil return branch 121 includes a drilled hole inlet 122, and the machine shell 10 is connected with a sealing member 123 at each drilled hole inlet 122 position for sealing. By forming the oil return branches 121 in the machine shell 10 in the form of drilled holes, the sewing machine oil return structure 100 is simpler, compared with the traditional external connection pipeline, the connection nodes and sealing points of the pipeline are reduced, and the risk of oil leakage caused by the sealing of the connection nodes and sealing points is reduced. During the drilling process, the drilled holes can also be accurately designed according to the overall structure of the machine shell 10 and the specific position of the needle bar 210, so that the oil return branches 121 can better adapt to the movement track of the needle bar 210.

[0047] Here, the sealing member 123 includes an oil plug screw or a hole plug.

[0048] In the embodiment, two adjacent oil return branches 121 are arranged vertically.

[0049] As shown in the figure, Figure 1 The machine shell 10 is provided with a limiting shaft sleeve 13, and the needle bar 210 can pass through the limiting shaft sleeve 13; the limiting shaft sleeve 13 abuts against the oil seal 111, and is used for limiting the oil seal 111 in the machine shell 10. The limiting shaft sleeve 13 is used for positioning and fixing the oil seal 111. The limiting shaft sleeve 13 can prevent the oil seal 111 from shifting or rotating during the high-speed reciprocating movement of the needle bar 210, so as to ensure that the oil seal 111 is always in the best working position, so that the oil seal 111 can always scrape the lubricating oil on the needle bar 210, and has a good sealing effect.

[0050] As shown in the figure, Figure 3As shown, the sewing machine oil return structure 100 further comprises an oil nozzle 30 and an oil pipe 40, the oil nozzle 30 is installed on the machine shell 10 and communicates with the oil return pipeline 12 and the oil pipe 40 respectively, and the oil pipe 40 is connected with and communicates with the oil pump 20 at an end away from the oil nozzle 30. By adding the oil nozzle 30 and the oil pipe 40, the delivery of the lubricating oil from the oil return pipeline 12 to the oil pump 20 is realized. When the internal structure of the sewing machine 200 is relatively complex and the oil return pipeline 12 cannot be directly connected with the oil pump 20, the oil nozzle 30 and the oil pipe 40 are added, so that the structure provided with the oil return pipeline 12 is applicable to different models of the sewing machine 200, which also includes the model in which the oil return pipeline 12 and the oil pump 20 are separately arranged.

[0051] In an embodiment, the oil pump 20 is partially arranged in the machine shell 10, and the oil pipe 40 partially extends out of the machine shell 10, and the part of the oil pipe 40 extending out of the machine shell 10 is connected with and communicates with the oil pump 20. By partially arranging the oil pump 20 in the machine shell 10, on the one hand, the damage of the oil pump 20 by external equipment is reduced, and the risk of damage of the oil pump 20 caused by external factors such as collision and pulling is reduced, and on the other hand, the structure of the sewing machine 200 is more compact. The oil pipe 40 partially extending out of the machine shell 10 connects the oil return pipeline 12 with the oil pump 20, so that the lubricating oil can flow from the oil return pipeline 12 into the oil pump 20 smoothly.

[0052] The application also provides the following technical solutions:

[0053] A sewing machine 200 comprising the sewing machine oil return structure 100 according to any one of the above embodiments.

[0054] When the sewing machine 200 performs a sewing action, the rotating shaft 220 of the sewing machine drives the needle bar 210 to perform up-and-down reciprocating motion, and drives the sewing needle 230 to perform sewing. In the up-and-down reciprocating motion of the needle bar 210, the oil seal 111 scrapes off the lubricating oil on the needle bar 210, and the lubricating oil flows into the oil pump 20 along the oil return pipeline 12, so as to realize the recovery of the lubricating oil.

[0055] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.

[0056] The above embodiments only express several implementation manners of the application, the description is relatively specific and detailed, but it should not be understood as the limitation of the patent application scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which all belong to the protection scope of the application. Therefore, the patent protection scope of the application should be subject to the appended claims.

Claims

1. An oil recovery structure of a sewing machine for recovering lubricating oil on a needle bar (210) in a sewing machine (200), characterized by, The sewing machine oil return structure (100) comprises: a casing (10) through which the needle bar (210) passes, the casing (10) being provided with an oil scraping member (11) and an oil return pipeline (12) therein, the oil scraping member (11) being used for scraping the lubricating oil on the needle bar (210) to the oil return pipeline (12); an oil pump (20) installed on the casing (10) and communicating with the oil return pipeline (12).

2. The sewing machine oil return structure according to claim 1, characterized by The oil return pipeline (12) comprises a plurality of oil return branches (121) which are communicated in sequence.

3. The sewing machine oil return structure according to claim 2, characterized by The oil return branch (121) is formed in the casing (10) in the form of a drilled hole. Each of the oil return branches (121) comprises a drilled hole inlet (122), and the casing (10) is connected with a sealing member (123) at the position of each of the drilled hole inlets (122) for sealing.

4. The sewing machine oil return structure according to claim 3, characterized by The sealing member (123) comprises an oil plugging screw or a hole plug.

5. The sewing machine oil return structure according to claim 2, characterized by Two adjacent oil return branches (121) are arranged vertically.

6. The sewing machine oil return structure according to claim 1, characterized by The oil scraping member (11) is configured as an oil seal (111).

7. The sewing machine oil return structure according to claim 6, characterized by A limiting shaft sleeve (13) is installed in the casing (10), and the limiting shaft sleeve (13) is through which the needle bar (210) passes. The limiting shaft sleeve (13) abuts against the oil seal (111) for limiting the oil seal (111) in the casing (10).

8. The sewing machine oil return structure according to claim 1, characterized by The sewing machine oil return structure (100) further comprises an oil nozzle (30) and an oil pipe (40), the oil nozzle (30) being installed on the casing (10) and communicating with the oil return pipeline (12) and the oil pipe (40) respectively; an end of the oil pipe (40) away from the oil nozzle (30) is connected with and communicates with the oil pump (20).

9. The sewing machine oil return structure according to claim 8, characterized by The oil pump (20) is partially arranged in the casing (10). The oil pipe (40) partially extends out of the casing (10), and the part of the oil pipe (40) extending out of the casing (10) is connected with and communicates with the oil pump (20).

10. A sewing machine (200) characterized by, The sewing machine oil return structure (100) comprises: a casing (10) through which the needle bar (210) passes, the casing (10) being provided with an oil scraping member (11) and an oil return pipeline (12) therein, the oil scraping member (11) being used for scraping the lubricating oil on the needle bar (210) to the oil return pipeline (12); an oil pump (20) installed on the casing (10) and communicating with the oil return pipeline (12). The oil return pipeline (12) comprises a plurality of oil return branches (121) which are communicated in sequence. The oil return branch (121) is formed in the casing (10) in the form of a drilled hole. Each of the oil return branches (121) comprises a drilled hole inlet (122), and the casing (10) is connected with a sealing member (123) at the position of each of the drilled hole inlets (122) for sealing. The sealing member (123) comprises an oil plugging screw or a hole plug. Two adjacent oil return branches (121) are arranged vertically. The oil scraping member (11) is configured as an oil seal (111). A limiting shaft sleeve (13) is installed in the casing (10), and the limiting shaft sleeve (13) is through which the needle bar (210) passes. The limiting shaft sleeve (13) abuts against the oil seal (111) for limiting the oil seal (111) in the casing (10). The sewing machine oil return structure (100) further comprises an oil nozzle (30) and an oil pipe (40), the oil nozzle (30) being installed on the casing (10) and communicating with the oil return pipeline (12) and the oil pipe (40) respectively; an end of the oil pipe (40) away from the oil nozzle (30) is connected with and communicates with the oil pump (20). The oil pump (20) is partially arranged in the casing (10). The oil pipe (40) partially extends out of the casing (10), and the part of the oil pipe (40) extending out of the casing (10) is connected with and communicates with the oil pump (20). The sewing machine oil return structure (100) comprises: a casing (10) through which the needle bar (210) passes, the casing (10) being provided with an oil scraping member (11) and an oil return pipeline (12) therein, the oil scraping member (11) being used for scraping the lubricating oil on the needle bar (210) to the oil return pipeline (12); an oil pump (20) installed on the casing (10) and communicating with the oil return pipeline (12). The oil return pipeline (12) comprises a plurality of oil return branches (121) which are communicated in sequence. The oil return branch (121) is formed in the casing (10) in the form of a drilled hole. Each of the oil return branches (121) comprises a drilled hole inlet (122), and the casing (10) is connected with a sealing member (123) at the position of each of the drilled hole inlets (122) for sealing. The sealing member (123) comprises an oil plugging screw or a hole plug. Two adjacent oil return branches (121) are arranged vertically. The oil scraping member (11) is configured as an oil seal (111). A limiting shaft sleeve (13) is installed in the casing (10), and the limiting shaft sleeve (13) is through which the needle bar (210) passes. The limiting shaft sleeve (13) abuts against the oil seal (111) for limiting the oil seal (111) in the casing (10). The sewing machine oil return structure (100) further comprises an oil nozzle (30) and an oil pipe (40), the oil nozzle (30) being installed on the casing (10) and communicating with the oil return pipeline (12) and the oil pipe (40) respectively; an end of the oil pipe (40) away from the oil nozzle (30) is connected with and communicates with the oil pump (20). The oil pump (20) is partially arranged in the casing (10). The oil pipe (40) partially extends out of the casing (10), and the part of the oil pipe (40) extending out of the casing (10) is connected with and communicates with the oil pump (20). The sewing machine oil return structure (100) comprises: a casing (10) through which the needle bar (210) passes, the casing (10) being provided with an oil scraping member (11) and an oil return pipeline (12) therein, the oil scraping member (11) being used for scraping the lubricating oil on the needle bar (210) to the oil return pipeline (12); an oil pump (20) installed on the casing (10) and communicating with the oil return pipeline (12). The oil return pipeline (12) comprises a plurality of oil return branches (121) which are communicated in sequence. The oil return branch (121) is formed in the casing (10) in the form of a drilled hole. Each of the oil return branches (121) comprises a drilled hole inlet (122), and the casing (10) is connected with a sealing member (123) at the position of each of the drilled hole inlets (122) for sealing. The sealing member (123) comprises an oil plugging screw or a hole plug. Two adjacent oil return branches (121) are arranged vertically. The oil scraping member (11) is configured as an oil seal (111). A limiting shaft sleeve (13) is installed in the casing (10), and the limiting shaft sleeve (13) is through which the needle bar (210) passes. The limiting shaft sleeve (13) abuts against the oil seal (111) for limiting the oil seal (111) in the casing (10). The sewing machine oil return structure (100) further comprises an oil nozzle (30) and an oil pipe (40), the oil nozzle (30) being installed on the casing (10) and communicating with the oil return pipeline (12) and the oil pipe (40) respectively; an end of the oil pipe (40) away from the oil nozzle (30) is connected with and communicates with the oil pump (20). The oil pump (20) is partially arranged in the casing (10). The oil pipe (40) partially extends out of the casing (10), and the part of the oil pipe (40) extending out of the casing (10) is connected with and communicates with the oil pump (20). The sewing machine oil return structure (100) comprises: a casing (10) through which the needle bar (210) passes, the casing (10) being provided with an oil scraping member (11) and an oil return pipeline (12) therein, the oil scraping member (11) being used for scraping the lubricating oil on the needle bar (210) to the oil return pipeline (12); an oil pump (20) installed on the casing (10) and communicating with the oil return pipeline (12). The oil return pipeline (12) comprises a plurality of oil return branches (121) which are communicated in sequence. The oil return branch (121) is formed in the casing (10) in the form of a drilled hole. Each of the oil return branches (121) comprises a drilled hole inlet (122), and the casing (10) is connected with a sealing member (123) at the position of each of the drilled hole inlets (122) for sealing. The sealing member (123) comprises an oil plugging screw or a hole plug. Two adjacent oil return branches (121) are arranged vertically. The oil scraping member

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