Threader link structure of sewing machine and sewing machine

Abstract

The utility model discloses a sewing machine thread picking connecting rod structure, aims at providing a kind of sewing machine thread picking connecting rod structure, which can reduce the friction between the pin hole of thread picking connecting rod and thread picking connecting rod pin, reduce the wear of the pin hole of thread picking connecting rod, and is beneficial to prolong the service life of sewing machine thread picking connecting rod structure. It includes: thread picking connecting rod, including pin hole, the inner wall of pin hole is equipped with oil storage annular groove;Thread picking connecting rod pin, insert in pin hole, thread picking connecting rod pin and pin hole gap cooperation, thread picking connecting rod can rotate around thread picking connecting rod pin;The thread picking connecting rod pin is equipped with the oil storage inner chamber of axial extension, and the oil tank that is connected with oil storage inner chamber is equipped on the outer side of thread picking connecting rod pin, and oil tank extends along the axial direction of thread picking connecting rod pin, and oil tank and oil storage annular groove intersect, and one end of oil tank is close to one end of pin hole, and the other end of oil tank is close to the other end of pin hole.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to a sewing machine thread take-up linkage structure and a sewing machine. Background Technology

[0002] With the continuous development of the garment machinery industry, users' demand for oil-free or low-oil lubrication is becoming increasingly strong. Various oil-free or low-oil sewing machines are already available on the market. Among the more mature oil-free or low-oil sewing machines, the thread take-up lever structure often uses a low-oil lubrication mechanism. In this structure, POM (Polymer Propeller) is the preferred material for the thread take-up lever, taking advantage of its self-lubricating properties, low coefficient of friction, high strength and rigidity, and excellent fatigue resistance. However, because the pin hole of the POM thread take-up lever usually meshes with a metal (e.g., carbon steel) thread take-up lever pin, the pin hole is prone to wear and enlargement during long-term use. Since industrial sewing machines are durable machinery, the control of the meshing clearance of the thread take-up lever structure is particularly important. Therefore, when the pin hole of the POM thread take-up lever wears and enlarges, it will cause an increase in the meshing clearance, affecting the thread take-up function and ultimately affecting the quality of the sewing stitches. For example, Chinese Patent Publication No. CN2818522Y, a utility model invention entitled "High-speed flat sewing machine with oil-free head", improves the front section of the upper shaft to a solid shaft and improves the lower shaft to a solid shaft as a whole, so that the needle bar needle insertion mechanism, thread take-up mechanism and rotary hook thread hook mechanism will not leak oil, thus preventing pollution of clothing.

[0003] Furthermore, to address the issue of increased wear in the pin hole of the POM (Polymer Orifice Wire Take-up Rod) connecting rod, some inventors have incorporated an annular oil reservoir on the inner wall of the pin hole. This reservoir stores solid lubricating grease to reduce friction between the pin hole and the connecting rod pin. However, this current structure has several drawbacks: the small size of the annular oil reservoir limits its oil storage capacity, and the lubricating medium (grease) cannot be added, leading to rapid grease consumption. Additionally, the groove width cannot cover the entire inner wall of the pin hole, resulting in insufficient oil film between the pin hole and the connecting rod pin, failing to provide a stable oil film for the entire moving contact surface. Consequently, even after prolonged operation, wear still easily occurs, increasing the clearance and affecting the wire take-up function. Utility Model Content

[0004] The primary objective of this invention is to provide a sewing machine thread take-up linkage structure and sewing machine that can reduce friction between the pin hole of the thread take-up linkage and the pin of the thread take-up linkage, reduce wear on the pin hole of the thread take-up linkage, and extend the service life of the sewing machine thread take-up linkage structure. This effectively improves the problem in the prior art where the pin hole of the thread take-up linkage is prone to wear, resulting in increased clearance and affecting the thread take-up function.

[0005] The second objective of this invention is to provide a sewing machine thread take-up linkage structure and a sewing machine that can adjust the fit clearance between the pin hole and the pin of the thread take-up linkage after the pin hole of the thread take-up linkage is worn, so as to compensate for the clearance generated after long-term operation and wear, thereby extending the service life of the sewing machine thread take-up linkage structure.

[0006] The technical solution of this utility model is:

[0007] A sewing machine thread take-up linkage structure includes:

[0008] The line-lifting rod includes a pin hole, and the inner wall of the pin hole is provided with an oil-storing annular groove.

[0009] The line-lifting rod pin is inserted into the pin hole, and the line-lifting rod pin and the pin hole are clearance-fitted. The line-lifting rod can rotate around the line-lifting rod pin. The line-lifting rod pin has an axially extending oil storage cavity. The outer surface of the line-lifting rod pin has an oil groove that communicates with the oil storage cavity. The oil groove extends along the axial direction of the line-lifting rod pin and intersects with the oil storage annular groove. One end of the oil groove is close to one end of the pin hole, and the other end of the oil groove is close to the other end of the pin hole. This solution provides a sewing machine thread take-up lever structure. On one hand, it effectively extends the lubrication cycle by increasing the storage capacity of lubricating grease. Specifically, the oil storage area of ​​this solution includes an annular oil storage groove and an inner oil storage cavity, both of which store solid lubricating grease. Compared to existing thread take-up lever structures that only have an annular oil storage groove, this solution adds an inner oil storage cavity within the thread take-up lever pin, effectively increasing the storage capacity of solid lubricating grease and thus extending the lubrication cycle. On the other hand, the oil groove is connected to the inner oil storage cavity, and the oil groove intersects with the annular oil storage groove. One end of the oil groove is close to the pin hole, and the other end is close to the other end of the pin hole. In this way, the length of the oil groove can effectively cover the inner wall of the pin hole. During the operation of the thread take-up linkage, a complete oil film can be formed between the inner wall of the pin hole and the thread take-up linkage pin, providing a stable oil film for the entire moving contact surface. Therefore, it can effectively reduce the friction between the pin hole and the thread take-up linkage pin, reduce the wear of the pin hole of the thread take-up linkage, and help extend the service life of the sewing machine thread take-up linkage structure. This effectively improves the problem in the existing technology that the pin hole of the thread take-up linkage is prone to wear, resulting in increased mating clearance and affecting the thread take-up function.

[0010] Preferably, one end face of the line-lifting rod pin is provided with an oil storage hole, and there are at least two oil grooves, each oil groove being evenly distributed around the circumference of the line-lifting rod pin. One end of each oil groove is connected to the end face of the line-lifting rod pin where the oil storage hole is located. The oil storage hole constitutes the oil storage cavity. A self-tapping screw is connected to the opening of the oil storage hole. The self-tapping screw adjusts the gap between the line-lifting rod pin and the pin hole by tightening it into the oil storage hole. In this way, not only can solid lubricating grease be added periodically through the oil reservoir opening, but more importantly, the oil reservoir opening is connected to a self-tapping screw. By tightening the self-tapping screw into the oil reservoir, the clearance between the thread take-up lever pin and the pin hole is adjusted. Specifically, during long-term use of the thread take-up lever, if the pin hole wears down, causing an increase in the clearance between the pin hole and the thread take-up lever pin, the self-tapping screw can be tightened into the oil reservoir. During this process, the opening of the oil groove will slightly increase, compensating for the clearance between the thread take-up lever pin and the pin hole (the clearance is controlled by adjusting the rotation angle of the self-tapping screw). This compensates for the clearance caused by long-term wear and tear, thereby further extending the service life of the sewing machine's thread take-up lever structure. Furthermore, it is easy to operate, requiring no professional mechanics, and has a simple structure and low manufacturing cost.

[0011] Preferably, the oil reservoir opening is provided with a fine thread that mates with a self-tapping screw. This design utilizes the small pitch and small helix angle of the fine thread to improve adjustment accuracy. Specifically, the distance the self-tapping screw moves into the pin hole is small with each turn of tightening, thus improving the adjustment accuracy of the gap between the lead-in connecting rod pin and the pin hole.

[0012] Preferably, the lead-up pin is equipped with a limiting sleeve, and one end of the lead-up pin has a flange. The flange and the opening of the oil reservoir are located at the same end of the lead-up pin. The pin hole is located between the limiting sleeve and the flange. The flange has several partition grooves that correspond one-to-one with the oil reservoirs. The partition grooves communicate with the corresponding oil reservoirs and divide the flange into at least two parts. In this way, the position of the lead-up pin can be limited by the limiting sleeve and the flange, without affecting the adjustment of the gap between the lead-up pin and the pin hole by the self-tapping screw.

[0013] Preferably, the limiting sleeve is locked to the lead-out rod pin by a set bolt. This facilitates the installation and fixation of the limiting sleeve, and also allows for position adjustment of the limiting sleeve to accommodate lead-out rods with pin holes of different lengths.

[0014] Preferably, both the oil storage annular groove and the oil storage inner cavity store solid lubricating grease, and both ends of the oil groove are located outside the pin hole; or both ends of the oil groove are flush with both ends of the pin hole; or both ends of the oil groove are located inside the pin hole; or one end of the oil groove is inside the pin hole and the other end is located outside the pin hole.

[0015] Preferably, the lead-up pin is made of metal, and the lead-up rod is made of plastic.

[0016] Preferably, the length of the oil reservoir cavity along the axial direction of the lead-up rod pin is greater than the length of the pin hole, and the length of the oil reservoir cavity along the axial direction of the lead-up rod pin is greater than the length of the oil groove. This allows for both an increase in the oil storage space of the oil reservoir cavity and facilitates the adjustment of the gap between the lead-up rod pin and the pin hole using self-tapping screws.

[0017] As a preferred option, it also includes:

[0018] Rotate the set spindle;

[0019] The needle bar crank is fixed on the main shaft, and a crank pin is provided on the needle bar crank;

[0020] The thread take-up lever is rotatably connected to the crank pin, and the thread take-up lever and the thread take-up connecting rod are rotatably connected via the thread take-up lever pin. In actual operation, the thread take-up motion trajectory is still completed by the four-bar linkage consisting of the needle bar crank, thread take-up lever, and thread take-up connecting rod, which uses the main shaft as the power input, thereby realizing the thread take-up function.

[0021] A sewing machine, including a sewing machine thread take-up linkage structure.

[0022] The beneficial effects of this utility model are:

[0023] Firstly, by increasing the storage capacity of lubricating grease, the lubrication cycle is effectively extended. Secondly, the oil groove is connected to the inner cavity of the oil reservoir, and the oil groove intersects with the annular oil reservoir. One end of the oil groove is close to one end of the pin hole, and the other end of the oil groove is close to the other end of the pin hole. In this way, the length of the oil groove can effectively cover the inner wall of the pin hole. During the operation of the thread take-up linkage, a complete oil film can be formed between the inner wall of the pin hole and the pin of the thread take-up linkage, providing a stable oil film for the entire moving contact surface. Therefore, it can effectively reduce the friction between the pin hole and the pin of the thread take-up linkage, reduce the wear of the pin hole of the thread take-up linkage, and help extend the service life of the sewing machine thread take-up linkage structure. This effectively improves the problem in the existing technology where the pin hole of the thread take-up linkage is prone to wear, resulting in increased mating clearance and affecting the thread take-up function.

[0024] Secondly, during long-term use of the thread take-up lever, if the pin hole of the thread take-up lever becomes worn, resulting in an increased clearance between the pin hole and the thread take-up lever pin, the self-tapping screw can be tightened into the oil reservoir. During this process, the opening of the oil groove will slightly increase, compensating for the clearance between the thread take-up lever pin and the pin hole, thus making up for the clearance caused by long-term wear and tear, and further extending the service life of the sewing machine's thread take-up lever structure. Attached Figure Description

[0025] Figure 1This is a cross-sectional structural diagram of the engagement between the line-fetching connecting rod and the line-fetching connecting rod pin of this utility model.

[0026] Figure 2 This is a three-dimensional partial structural diagram of a sewing machine thread take-up linkage structure according to this utility model.

[0027] In the picture:

[0028] Line-lifting connecting rod 1, pin hole 1.1, oil storage annular groove 1.2;

[0029] 2. Line-lifting connecting pin; 2.1. Oil storage cavity; 2.2. Oil trough; 2.3. Flange; 2.4. Partition groove;

[0030] 3 self-tapping screws;

[0031] Limiting sleeve 4;

[0032] Spindle 5;

[0033] Needle bar crank 6, crank pin 6.1;

[0034] 7. Line picker lever;

[0035] 8. Line take-up lever pin. Detailed Implementation

[0036] Specific Implementation Example 1, such as Figure 1 , Figure 2 As shown, a sewing machine thread take-up linkage structure includes a thread take-up linkage 1 and a thread take-up linkage pin 2.

[0037] The line-lifting rod 1 includes a pin hole 1.1. An oil-retaining annular groove 1.2 is provided on the inner wall of the pin hole 1.1.

[0038] The thread-lifting rod pin 2 is inserted into the pin hole 1.1. The thread-lifting rod pin 2 and the pin hole 1.1 are clearance-fitted. The thread-lifting rod 1 can rotate around the thread-lifting rod pin 2. The thread-lifting rod pin 2 has an axially extending oil reservoir cavity 2.1. The outer surface of the thread-lifting rod pin 2 has an oil groove 2.2 that communicates with the oil reservoir cavity 2.1. There are one or more oil grooves 2.2. The oil groove 2.2 extends axially along the thread-lifting rod pin 2. The oil groove 2.2 intersects with the oil reservoir annular groove 1.2. One end of the oil groove 2.2 is close to one end of the pin hole 1.1, and the other end of the oil groove 2.2 is close to the other end of the pin hole 1.1. Both the oil reservoir annular groove 1.2 and the oil reservoir cavity 2.1 store solid lubricating grease.

[0039] This embodiment of a sewing machine thread take-up lever structure, on the one hand, effectively extends the lubrication cycle by increasing the storage capacity of lubricating grease. Specifically, the oil storage area of ​​this embodiment includes an annular oil storage groove 1.2 and an inner oil storage cavity 2.1, both of which store solid lubricating grease. Compared with the prior art thread take-up lever structure 1, which only has an annular oil storage groove 1.2, this embodiment of a sewing machine thread take-up lever structure adds an inner oil storage cavity 2.1 within the thread take-up lever pin 2, effectively increasing the storage capacity of solid lubricating grease and thus effectively extending the lubrication cycle. On the other hand, the oil groove 2.2 is connected to the inner oil storage cavity 2.1, and the oil groove 2.2 intersects with the annular oil storage groove 1.2. One end of the oil groove 2.2 is close to one end of the pin hole 1.1, and the other end of the oil groove 2.2 is close to the other end of the pin hole 1.1. In this way, the length of the oil groove 2.2 can well cover the inner wall of the pin hole 1.1. During the operation of the thread take-up linkage 1, a complete oil film can be formed between the inner wall of the pin hole 1.1 and the thread take-up linkage pin 2, providing a stable oil film for the entire moving contact surface. Therefore, it can effectively reduce the friction between the pin hole 1.1 and the thread take-up linkage pin 2, reduce the wear of the pin hole 1.1 of the thread take-up linkage 1, and help extend the service life of the sewing machine thread take-up linkage structure. Thus, it effectively improves the problem in the prior art that the pin hole 1.1 of the thread take-up linkage 1 is prone to wear, resulting in an increased fit clearance and affecting the thread take-up function.

[0040] Specific embodiment two, such as Figure 1 , Figure 2 As shown, a sewing machine thread take-up linkage structure includes a thread take-up linkage 1 and a thread take-up linkage pin 2.

[0041] The line-lifting rod 1 includes a pin hole 1.1. An oil-retaining annular groove 1.2 is provided on the inner wall of the pin hole 1.1.

[0042] The thread-lifting rod pin 2 is inserted into the pin hole 1.1. The thread-lifting rod pin 2 and the pin hole 1.1 are clearance-fitted. The thread-lifting rod 1 can rotate around the thread-lifting rod pin 2. The thread-lifting rod pin 2 has an axially extending oil reservoir cavity 2.1. An oil groove 2.2 is provided on the outer surface of the thread-lifting rod pin 2, which communicates with the oil reservoir cavity 2.1. The oil groove 2.2 extends axially along the thread-lifting rod pin 2. The oil groove 2.2 intersects with the oil reservoir annular groove 1.2. One end of the oil groove 2.2 is close to one end of the pin hole 1.1, and the other end of the oil groove 2.2 is close to the other end of the pin hole 1.1. Both the oil reservoir annular groove 1.2 and the oil reservoir cavity 2.1 store solid lubricating grease.

[0043] In this embodiment, an oil reservoir hole is provided on one end face of the line-lifting rod pin 2, extending axially along the line-lifting rod pin 2. In this embodiment, there are at least two oil grooves 2.2, and each oil groove 2.2 is evenly distributed around the line-lifting rod pin 2. The groove width of the oil groove 2.2 is 0.1-1.5 mm. For example, there are 2, 3, or 4 oil grooves 2.2. One end of each oil groove 2.2 is connected to the end face of the line-lifting rod pin 2 where the oil reservoir hole is located. The inner cavity of the oil reservoir hole constitutes the oil reservoir cavity 2.1. A self-tapping screw 3 is connected to the opening of the oil reservoir hole. The self-tapping screw 3 adjusts the gap between the line-lifting rod pin 2 and the pin hole 1.1 by tightening it into the oil reservoir hole.

[0044] In one example, the oil reservoir is a blind hole. Self-tapping screw 3 seals the opening of the oil reservoir.

[0045] In another example, the oil reservoir is through, and a self-tapping screw 3 is connected to one opening of the oil reservoir; the other opening of the oil reservoir is sealed by a plug.

[0046] This embodiment of a sewing machine thread take-up lever structure, on the one hand, effectively extends the lubrication cycle by increasing the storage capacity of lubricating grease. Specifically, the oil storage area of ​​this embodiment includes an annular oil storage groove 1.2 and an inner oil storage cavity 2.1, both of which store solid lubricating grease. Compared with the prior art thread take-up lever structure 1, which only has an annular oil storage groove 1.2, this embodiment of a sewing machine thread take-up lever structure adds an inner oil storage cavity 2.1 within the thread take-up lever pin 2, effectively increasing the storage capacity of solid lubricating grease and thus effectively extending the lubrication cycle. On the other hand, the oil groove 2.2 is connected to the inner oil storage cavity 2.1, and the oil groove 2.2 intersects with the annular oil storage groove 1.2. One end of the oil groove 2.2 is close to one end of the pin hole 1.1, and the other end of the oil groove 2.2 is close to the other end of the pin hole 1.1. In this way, the length of the oil groove 2.2 can well cover the inner wall of the pin hole 1.1. During the operation of the thread take-up linkage 1, a complete oil film can be formed between the inner wall of the pin hole 1.1 and the thread take-up linkage pin 2, providing a stable oil film for the entire moving contact surface. Therefore, it can effectively reduce the friction between the pin hole 1.1 and the thread take-up linkage pin 2, reduce the wear of the pin hole 1.1 of the thread take-up linkage 1, and help extend the service life of the sewing machine thread take-up linkage structure. Thus, it effectively improves the problem in the prior art that the pin hole 1.1 of the thread take-up linkage 1 is prone to wear, resulting in an increased fit clearance and affecting the thread take-up function.

[0047] Furthermore, since the opening of the oil reservoir is connected to a self-tapping screw 3, the self-tapping screw 3 adjusts the gap between the line take-up rod pin 2 and the pin hole 1.1 by tightening it into the oil reservoir. In this way, not only can solid lubricating grease be added periodically through the oil reservoir opening, but more importantly, the oil reservoir opening is connected to a self-tapping screw 3. The self-tapping screw 3, by tightening into the oil reservoir, adjusts the gap between the thread take-up lever pin 2 and the pin hole 1.1. Specifically, during long-term use of the thread take-up lever 1, if the pin hole 1.1 of the thread take-up lever 1 wears down, causing an increase in the clearance between the pin hole 1.1 and the thread take-up lever pin 2, the self-tapping screw 3 can be tightened into the oil reservoir. During this process, the opening of the oil groove 2.2 will slightly increase, compensating for the gap between the thread take-up lever pin 2 and the pin hole 1.1 (the gap between the thread take-up lever pin 2 and the pin hole 1.1 is controlled by adjusting the rotation angle of the self-tapping screw 3). This compensates for the gap caused by long-term wear and tear, thereby further extending the service life of the sewing machine's thread take-up lever structure. Furthermore, it is easy to operate, requiring no professional mechanics, and has a simple structure and low manufacturing cost.

[0048] Specifically, such as Figure 2 As shown, a sewing machine thread take-up linkage structure also includes a main shaft 5, a needle bar crank 6, and a thread take-up lever 7. The main shaft 5 is rotatably mounted. In this embodiment, the main shaft 5 is rotatably mounted on the sewing machine frame and is horizontally distributed. The thread take-up lever pin 2 is mounted on the sewing machine frame. The needle bar crank 6 is fixed to the main shaft 5. A crank pin 6.1 is provided on the needle bar crank 6. The crank pin 6.1 is parallel to the main shaft 5. The thread take-up lever 7 is rotatably connected to the crank pin 6.1. The thread take-up lever 7 is rotatably connected to the thread take-up linkage 1 through a thread take-up lever pin 8. In actual operation, the thread take-up trajectory is still completed by the movement of the four-bar linkage consisting of the needle bar crank 6, the thread take-up lever 7, and the thread take-up linkage 1, with the main shaft 5 as the power input, thereby realizing the thread take-up function.

[0049] In this embodiment, the line-lifting rod 1 is made of plastic, and the line-lifting rod pin 2 is made of metal.

[0050] For example, the line-lifting lever pin 2 is made of POM material. Of course, the line-lifting lever 1 can also be made of other plastic materials.

[0051] Furthermore, such as Figure 1 , Figure 2 As shown, the oil reservoir opening is provided with a fine thread that mates with the self-tapping screw 3. The thread of the self-tapping screw 3 is also a fine thread. This design utilizes the characteristics of fine threads—small pitch and small helix angle—to improve adjustment accuracy. Specifically, for each turn of the self-tapping screw 3, it moves a smaller distance into the pin hole 1.1, thus improving the adjustment accuracy of the gap between the thread take-up connecting rod pin 2 and the pin hole 1.1. It should be noted that the oil reservoir opening may also be without a thread.

[0052] Furthermore, such as Figure 1 As shown, the length of the oil storage cavity 2.1 along the axial direction of the line-lifting rod pin 2 is greater than the length of the pin hole 1.1. The length of the oil storage cavity 2.1 along the axial direction of the line-lifting rod pin 2 is greater than the length of the oil groove 2.2. In this way, on the one hand, it can increase the oil storage space of the oil storage cavity 2.1, and on the other hand, it can facilitate the adjustment of the gap between the line-lifting rod pin 2 and the pin hole 1.1 by the self-tapping screw 3.

[0053] Furthermore, such as Figure 1 As shown, the line-lifting link pin 2 is equipped with a limiting sleeve 4. One end of the line-lifting link pin 2 has a flange 2.3, which is located at the same end as the oil reservoir opening. The pin hole 1.1 is located between the limiting sleeve 4 and the flange 2.3. The flange 2.3 has several partition grooves 2.4 corresponding to the oil grooves 2.2. These partition grooves 2.4 communicate with their corresponding oil grooves 2.2 and divide the flange 2.3 into at least two sections. For example, if there are two oil grooves 2.2, the two partition grooves divide the flange into two sections; if there are three oil grooves 2.2, the three partition grooves divide the flange into three sections. Thus, the position of the line-lifting link 1 can be limited by the limiting sleeve 4 and the flange, without affecting the adjustment of the gap between the line-lifting link pin 2 and the pin hole 1.1 by the self-tapping screw 3.

[0054] In this embodiment, the limiting sleeve 4 is locked onto the lead-up rod pin 2 by a set bolt. This facilitates the installation and fixation of the limiting sleeve 4, and also allows for the adjustment of the position of the limiting sleeve 4 to accommodate lead-up rods 1 with pin holes 1.1 of different lengths.

[0055] Furthermore, one end of the oil groove 2.2 is close to one end of the pin hole 1.1, and the other end of the oil groove 2.2 is close to the other end of the pin hole 1.1. Specifically,

[0056] In one example, both ends of the oil groove 2.2 are located inside the pin hole 1.1. Although both ends of the oil groove 2.2 are located inside the pin hole 1.1 in this design, because the ends of the oil groove 2.2 are close to the port of the pin hole 1.1, the length of the oil groove 2.2 can also effectively cover the inner wall of the pin hole 1.1. During the operation of the thread take-up lever 1, a complete oil film can be formed between the inner wall of the pin hole 1.1 and the thread take-up lever pin 2, providing a stable oil film for the entire moving contact surface. This effectively reduces the friction between the pin hole 1.1 and the thread take-up lever pin 2 of the thread take-up lever 1, reduces the wear of the pin hole 1.1 of the thread take-up lever 1, and helps to extend the service life of the sewing machine thread take-up lever structure.

[0057] In another example, both ends of the oil groove 2.2 are located outside the pin hole 1.1. Although both ends of the oil groove 2.2 are located outside the pin hole 1.1 in this scheme, because the ends of the oil groove 2.2 are close to the port of the pin hole 1.1 and solid lubricating grease is used, the grease will hardly overflow to the outside of the pin hole 1.1. At the same time, the length of the oil groove 2.2 can cover the inner wall of the pin hole 1.1 well. During the operation of the thread take-up lever 1, a complete oil film can be formed between the inner wall of the pin hole 1.1 and the thread take-up lever pin 2, providing a stable oil film for the entire moving contact surface. This effectively reduces the friction between the pin hole 1.1 and the thread take-up lever pin 2 of the thread take-up lever 1, reduces the wear of the pin hole 1.1 of the thread take-up lever 1, and helps to extend the service life of the sewing machine thread take-up lever structure.

[0058] In the third example, the two ends of the oil groove 2.2 are flush with the two ends of the pin hole 1.1. Thus, the length of the oil groove 2.2 precisely covers the inner wall of the pin hole 1.1. During the operation of the thread take-up lever 1, a complete oil film can be formed between the inner wall of the pin hole 1.1 and the thread take-up lever pin 2, providing a stable oil film for the entire moving contact surface. This effectively reduces the friction between the pin hole 1.1 and the thread take-up lever pin 2, reduces wear on the pin hole 1.1, and helps extend the service life of the sewing machine's thread take-up lever structure.

[0059] In the fourth example, one end of the oil groove 2.2 is inside the pin hole 1.1, and the other end is outside the pin hole 1.1. Although one end of the oil groove 2.2 is inside the pin hole 1.1 in this scheme, since both ends of the oil groove 2.2 are close to the port of the pin hole 1.1, the length of the oil groove 2.2 can still cover the inner wall of the pin hole 1.1 well. During the operation of the thread take-up lever 1, a complete oil film can be formed between the inner wall of the pin hole 1.1 and the thread take-up lever pin 2, providing a stable oil film for the entire moving contact surface. This effectively reduces the friction between the pin hole 1.1 and the thread take-up lever pin 2 of the thread take-up lever 1, reduces the wear of the pin hole 1.1 of the thread take-up lever 1, and helps to extend the service life of the sewing machine thread take-up lever structure.

[0060] Specific embodiment three: A sewing machine, including a sewing machine thread take-up linkage structure. The specific structure of the sewing machine thread take-up linkage structure in this embodiment is similar to that in specific embodiment one or specific embodiment two.

[0061] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A sewing machine thread take-up linkage structure, characterized in that it comprises: The line-lifting rod includes a pin hole, and the inner wall of the pin hole is provided with an oil-storing annular groove. The line-lifting rod pin is inserted into the pin hole, and the line-lifting rod pin and the pin hole are clearance-fitted. The line-lifting rod can rotate around the line-lifting rod pin. The line-lifting rod pin has an axially extending oil storage cavity. The outer surface of the line-lifting rod pin has an oil groove that communicates with the oil storage cavity. The oil groove extends along the axial direction of the line-lifting rod pin and intersects with the oil storage annular groove. One end of the oil groove is close to one end of the pin hole, and the other end of the oil groove is close to the other end of the pin hole.

2. The sewing machine thread take-up linkage structure according to claim 1, characterized in that, The lead-up connecting pin has an oil storage hole on one end face. There are at least two oil grooves, and each oil groove is evenly distributed around the lead-up connecting pin. One end of each oil groove is connected to the end face of the lead-up connecting pin where the oil storage hole is located. The oil storage hole forms the oil storage cavity. A self-tapping screw is connected to the opening of the oil storage hole. The self-tapping screw adjusts the gap between the lead-up connecting pin and the pin hole by tightening it into the oil storage hole.

3. The sewing machine thread take-up linkage structure according to claim 2, characterized in that, The oil storage hole has fine threads inside its opening that mate with self-tapping screws.

4. A sewing machine thread take-up linkage structure according to claim 2 or 3, characterized in that, The line-lifting rod pin is provided with a limiting sleeve, and one end of the line-lifting rod pin is provided with a flange. The flange and the opening of the oil storage hole are located at the same end of the line-lifting rod pin. The pin hole is located between the limiting sleeve and the flange. The flange is provided with several partition grooves that correspond one-to-one with the oil tank. The partition grooves are connected to the corresponding oil tanks and divide the flange into at least two parts.

5. The sewing machine thread take-up linkage structure according to claim 4, characterized in that, The limiting sleeve is locked to the lead-out connecting rod pin by a set bolt.

6. A sewing machine thread take-up linkage structure according to claim 1, 2, or 3, characterized in that, Both the oil storage annular groove and the oil storage inner cavity store solid lubricating grease. Both ends of the oil groove are located outside the pin hole; or both ends of the oil groove are flush with both ends of the pin hole; or both ends of the oil groove are located inside the pin hole; or one end of the oil groove is inside the pin hole and the other end is located outside the pin hole.

7. A sewing machine thread take-up linkage structure according to claim 1, 2, or 3, characterized in that, The line-lifting linkage pin is made of metal, while the line-lifting linkage itself is made of plastic.

8. A sewing machine thread take-up linkage structure according to claim 1, 2, or 3, characterized in that, The length of the oil storage cavity along the axial direction of the line-lifting rod pin is greater than the length of the pin hole, and the length of the oil storage cavity along the axial direction of the line-lifting rod pin is greater than the length of the oil groove.

9. A sewing machine thread take-up linkage structure according to claim 1, 2, or 3, characterized in that it further includes... include: Rotate the set spindle; The needle bar crank is fixed on the main shaft, and a crank pin is provided on the needle bar crank; The line-fetching lever is rotatably connected to the crank pin, and the line-fetching lever and the line-fetching connecting rod are rotatably connected through the line-fetching lever pin.

10. A sewing machine, characterized in that, The sewing machine thread take-up linkage structure includes any one of claims 1-9.

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