Oil supply mechanism for oil rotating shuttle and oil-free rotating shuttle and sewing machine

Abstract

The oil supply mechanism comprises a rotating shuttle driving shaft sleeve, a rotating shuttle driving shaft is arranged in the rotating shuttle driving shaft sleeve in a penetrating mode, the two ends of the rotating shuttle driving shaft sleeve are connected with the rotating shuttle driving shaft in a sealed mode respectively, and a shaft sleeve oil inlet hole and a shaft sleeve oil return hole are formed in the rotating shuttle driving shaft sleeve. A driving shaft oil inlet hole communicated with the shaft sleeve oil inlet hole is formed in the rotating shuttle driving shaft; one end, connected with the oil rotating shuttle or the oil-free rotating shuttle, of the rotating shuttle driving shaft is opened and forms a driving shaft oil outlet hole; for an oiled rotating shuttle, the driving shaft oil outlet hole is used for discharging lubricating oil entering the inner cavity of the rotating shuttle driving shaft and enabling the lubricating oil to enter the oiled rotating shuttle, and for an oil-free rotating shuttle, the rotating shuttle driving shaft is detachably connected with a sealing and plugging assembly used for sealing and plugging the driving shaft oil outlet hole at the driving shaft oil outlet hole. The oil supply mechanism is suitable for both an oil rotating shuttle and an oil-free rotating shuttle, and is high in universality.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sewing machine technical field, concretely relates to a kind of oil supply mechanism for oil bobbin and oilless bobbin and sewing machine. BACKGROUND

[0002] Bobbin is the core component of sewing machine, mainly for forming stitch. Since the rotating speed of bobbin is high, it needs to be supplied with oil in general, and this kind of bobbin is also called oil bobbin; but with people's higher and higher requirement for garment quality, oilless bobbin becomes an inevitable trend, and this kind of bobbin is also called oilless bobbin. Garment manufacturers need a sewing machine that can install both oil bobbin and oilless bobbin. Sewing machine manufacturers need to compress the number of parts to make the parts normalized, so for the sewing machine that can install both oil bobbin and oilless bobbin, it also needs to be equipped with an oil supply mechanism that can adapt to both oil bobbin and oilless bobbin. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides an oil supply mechanism for oil bobbin and oilless bobbin and a sewing machine, which is suitable for both oil bobbin and oilless bobbin and has strong versatility.

[0004] The utility model solves the technical problems by adopting the following technical solutions:

[0005] An oil supply mechanism for oil bobbin and oilless bobbin, comprising a bobbin drive shaft sleeve fixed to the sewing machine housing, a hollow bobbin drive shaft is arranged in the bobbin drive shaft sleeve, the two ends of the bobbin drive shaft sleeve are respectively sealed connected with the bobbin drive shaft, the bobbin drive shaft sleeve is provided with a sleeve oil inlet hole and a sleeve oil return hole, the bobbin drive shaft is provided with a drive shaft oil inlet hole communicated with the sleeve oil inlet hole, part of the lubricating oil entering between the bobbin drive shaft sleeve and the bobbin drive shaft through the sleeve oil inlet hole enters the inner cavity of the bobbin drive shaft through the drive shaft oil inlet hole and part of the lubricating oil returns through the sleeve oil return hole, and the bobbin drive shaft is connected with one end of the oil bobbin or the oilless bobbin, which is open and forms a drive shaft oil outlet hole; for the oil bobbin, the drive shaft oil outlet hole is used to discharge the lubricating oil entering the inner cavity of the bobbin drive shaft and enter the oil bobbin, and for the oilless bobbin, the bobbin drive shaft is detachably connected with a sealing plugging assembly for sealing and plugging the drive shaft oil outlet hole at the drive shaft oil outlet hole.

[0006] Further, for the oil bobbin, the bobbin drive shaft is detachably connected with an oil filter core at the drive shaft oil outlet hole, and the oil filter core is used to filter the lubricating oil discharged from the inner cavity of the bobbin drive shaft.

[0007] Further, the filter core positioning sleeve is hollow and has openings at both ends, and the opening size at one end of the filter core positioning sleeve is larger than that at the other end, wherein the opening at one end of the filter core positioning sleeve forms a filter core inlet and the opening at the other end forms a positioning sleeve oil outlet hole, and the filter core is inserted into the filter core positioning sleeve from the opening at one end of the filter core positioning sleeve and is clamped at the other end.

[0008] Further, the sealing plugging assembly comprises an oil limiting bolt, which is threadedly connected to the inner cavity surface of the bobbin case drive shaft at the drive shaft oil outlet hole.

[0009] Further, the oil limiting bolt comprises an oil limiting bolt head and an oil limiting bolt rod, the surface of the oil limiting bolt rod adjacent to the oil limiting bolt head is a smooth surface and is referred to as an oil limiting bolt rod smooth section, the surface of the oil limiting bolt rod at other positions is provided with threads and is referred to as an oil limiting bolt rod threaded section, the oil limiting bolt rod smooth section is a right circular truncated cone, and the size of one end of the oil limiting bolt rod smooth section connected with the oil limiting bolt head is smaller than that of the other end connected with the oil limiting bolt head; the surface of the inner cavity surface of the bobbin case drive shaft at the drive shaft oil outlet hole matched with the oil limiting bolt head is referred to as a first inner cavity surface, the surface of the oil limiting bolt rod smooth section corresponding to the section adjacent to the oil limiting bolt head is referred to as a second inner cavity surface, the surface of the oil limiting bolt rod smooth section corresponding to the other positions is referred to as a third inner cavity surface, and the surface matched with the oil limiting bolt rod threaded section is referred to as a fourth inner cavity surface, wherein the second inner cavity surface is a right circular truncated cone, the size of one end of the second inner cavity surface connected with the third inner cavity surface is smaller than that of the other end connected with the first inner cavity surface, and the taper of the second inner cavity surface is larger than that of the oil limiting bolt rod smooth section; an O-shaped sealing ring is sleeved outside the section of the oil limiting bolt rod smooth section adjacent to the oil limiting bolt head, the oil limiting bolt rod threaded section and the fourth inner cavity surface are threadedly connected in place, the O-shaped sealing ring is extruded by cooperation between the section of the oil limiting bolt rod smooth section adjacent to the oil limiting bolt head and the second inner cavity surface, and sealing is achieved.

[0010] Further, the shaft sleeve oil inlet hole and the shaft sleeve oil return hole are both from the outer circumferential surface to the inner circumferential surface of the bobbin case drive shaft sleeve, and the drive shaft oil inlet hole is from the outer circumferential surface of the bobbin case drive shaft to the inner cavity surface of the bobbin case drive shaft; the drive shaft oil inlet hole is located at a position close to the shaft sleeve oil inlet hole.

[0011] Further, the shaft sleeve oil inlet hole and the shaft sleeve oil return hole are both arranged along the radial direction of the bobbin case drive shaft sleeve; and the drive shaft oil inlet hole is arranged along the radial direction of the bobbin case drive shaft.

[0012] Further, the shaft sleeve oil inlet hole is connected with an oil tank through an oil inlet pipe, the shaft sleeve oil return hole is connected with the oil tank through an oil return pipe, lubricating oil in the oil tank is pumped by an oil pump, and the oil pump is one of a vane pump, a gear pump or a plunger pump.

[0013] Further, the two ends of the rotating hook driving shaft sleeve are respectively sealed and connected with the rotating hook driving shaft through spring sealing rings.

[0014] A sewing machine comprises the oil supply mechanism for the oil rotating hook and the oil-free rotating hook.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] The utility model discloses a supply oil mechanism for oil bobbin and oilless bobbin, including the fixed bobbin drive shaft sleeve of sewing machine casing, the hollow bobbin drive shaft is arranged in the bobbin drive shaft sleeve, and the both ends of bobbin drive shaft sleeve are sealedly connected with bobbin drive shaft respectively, is equipped with the sleeve oil inlet hole and the sleeve oil return hole on the bobbin drive shaft sleeve, is equipped with the drive shaft oil inlet hole of communication with sleeve oil inlet hole on the bobbin drive shaft, and the lubricating oil part between the bobbin drive shaft sleeve and bobbin drive shaft that enters sleeve oil inlet hole enters the inner chamber of bobbin drive shaft through drive shaft oil inlet hole and part returns through sleeve oil return hole, and the one end opening of bobbin drive shaft and oil bobbin or oilless bobbin connection forms drive shaft oil outlet hole, for oil bobbin, drive shaft oil outlet hole is used for making the lubricating oil that enters the inner chamber of bobbin drive shaft discharge and enter oil bobbin, for oilless bobbin, the detachable connection of bobbin drive shaft at drive shaft oil outlet hole has the sealed plugging component for sealing and plugging drive shaft oil outlet hole, so for oil bobbin, the lubricating oil part between the bobbin drive shaft sleeve and bobbin drive shaft that enters sleeve oil inlet hole enters the inner chamber of bobbin drive shaft through drive shaft oil inlet hole and discharges through drive shaft oil outlet hole and enters oil bobbin, realizes the oil supply of oil bobbin, and the lubricating oil between the bobbin drive shaft sleeve and bobbin drive shaft also forms an oil film between the bobbin drive shaft sleeve and bobbin drive shaft, realizes the lubrication of bobbin drive shaft sleeve and bobbin drive shaft and absorbs the heat generated by high speed rotation of bobbin drive shaft, and the lubricating oil that absorbs excessive heat between the bobbin drive shaft sleeve and bobbin drive shaft returns through sleeve oil return hole to take away the heat generated by high speed rotation of bobbin drive shaft, so the oil supply mechanism can supply oil for oil bobbin, for oilless bobbin, the lubricating oil part between the bobbin drive shaft sleeve and bobbin drive shaft that enters sleeve oil inlet hole enters the inner chamber of bobbin drive shaft through drive shaft oil inlet hole, and the sealed plugging component prevents the lubricating oil in the inner chamber of bobbin drive shaft from discharging through drive shaft oil outlet hole and entering oilless bobbin, and the lubricating oil between the bobbin drive shaft sleeve and bobbin drive shaft also forms an oil film between the bobbin drive shaft sleeve and bobbin drive shaft, realizes the lubrication of bobbin drive shaft sleeve and bobbin drive shaft and absorbs the heat generated by high speed rotation of bobbin drive shaft, and the lubricating oil that absorbs excessive heat between the bobbin drive shaft sleeve and bobbin drive shaft returns through sleeve oil return hole to take away the heat generated by high speed rotation of bobbin drive shaft, so the oil supply mechanism is also applicable to oilless bobbin, in conclusion, the oil supply mechanism is applicable to oil bobbin and oilless bobbin, and has strong versatility. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the three-dimensional structure schematic diagram of the oil supply mechanism for oil bobbin and oilless bobbin in the utility model for not installing the filter core or sealed plugging component,

[0018] Figure 2 It is the front view cross section structure schematic diagram, Figure 1 ​

[0019] Figure 3 For installing the oil filter core to the structure schematic view of the oil outlet hole of the driving shaft in the middle; Figure 2

[0020] Figure 4 For Figure 3 The enlarged structure schematic view of the circle A in the middle;

[0021] Figure 5 For installing the oil limiting bolt to the structure schematic view of the oil outlet hole of the driving shaft in the middle; Figure 2

[0022] Figure 6 For Figure 5 The enlarged structure schematic view of the circle B in the middle.

[0023] The figure mark explanation: 1, the bobbin drive shaft sleeve, 101, the shaft sleeve oil inlet hole, 102, the shaft sleeve oil return hole, 2, the bobbin drive shaft, 201, the driving shaft oil inlet hole, 202, the driving shaft oil outlet hole, 203, the first inner cavity surface, 204, the second inner cavity surface, 205, the third inner cavity surface, 206, the fourth inner cavity surface, 207, the inner cavity, 3, the oil bobbin, 4, the oilless bobbin, 501, the oil filter core, 502, the oil filter core positioning sleeve, 50201, the positioning sleeve oil outlet hole, 6, the oil limiting bolt, 601, the oil limiting bolt head, 602, the oil limiting bolt rod, 60201, the oil limiting bolt rod smooth section, 60202, the oil limiting bolt rod threaded section, 7, the O-shaped sealing ring, 8, the spring sealing ring. DETAILED DESCRIPTION

[0024] The specific embodiments of the utility model will be further described in detail in combination with the drawings. These embodiments are only used for describing the utility model, and are not limited to the utility model.

[0025] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship based on the figure shown, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] ​​In the description of the utility model, need explain, unless another explicit provision and limitation, term " install " " link " " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through intermediate medium indirectly connected, can be two element inside intercommunication.For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific situation.

[0027] As Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown in a kind of oil supply mechanism for oil bobbin and oilless bobbin, including fixed on the bobbin drive shaft sleeve 1 of sewing machine shell, hollow bobbin drive shaft 2 is arranged in bobbin drive shaft sleeve 1, the both ends of bobbin drive shaft sleeve 1 are respectively sealed with bobbin drive shaft 2, bobbin drive shaft sleeve 1 is equipped with shaft sleeve oil inlet hole 101 and shaft sleeve oil return hole 102, bobbin drive shaft 2 is equipped with drive shaft oil inlet hole 201 communicated with shaft sleeve oil inlet hole 101, the lubricating oil portion between bobbin drive shaft sleeve 1 and bobbin drive shaft 2 entering through shaft sleeve oil inlet hole 101 is entered into the inner cavity 207 of bobbin drive shaft 2 by drive shaft oil inlet hole 201 and part is returned by shaft sleeve oil return hole 102, bobbin drive shaft 2 is connected with the open end of oil bobbin 3 or oilless bobbin 4 and forms drive shaft oil outlet hole 202;For oil bobbin 3, drive shaft oil outlet hole 202 is used to make the lubricating oil entering the inner cavity 207 of bobbin drive shaft 2 discharge and enter oil bobbin 3, for oilless bobbin 4, bobbin drive shaft 2 is detachably connected with sealing plugging assembly for sealing plugging drive shaft oil outlet hole 202 at drive shaft oil outlet hole 202. Wherein bobbin drive shaft 2 drives oil bobbin 3 or oilless bobbin 4 to rotate under the driving of the power source of sewing machine.

[0028] In this way, for the oil-carrying rotary hook 3, part of the lubricating oil that enters between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 through the sleeve oil inlet hole 101 enters the inner cavity 207 of the rotary hook drive shaft 2 through the drive shaft oil inlet hole 201, and is discharged through the drive shaft oil outlet hole 202 and enters the oil-carrying rotary hook 3, thereby realizing the oil supply to the oil-carrying rotary hook 3. Moreover, the lubricating oil that enters between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 also forms an oil film between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2, thereby realizing the lubrication of the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 and absorbing the heat generated by the high-speed rotation of the rotary hook drive shaft 2. The lubricating oil that absorbs the excess heat between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 returns through the sleeve oil return hole 102 to take away the heat generated by the high-speed rotation of the rotary hook drive shaft 2. Therefore, this oil supply mechanism can supply oil to the oil-carrying rotary hook 3; for the oil-free rotary hook 3 The lubricating oil that enters the space between the hook drive sleeve 1 and the hook drive shaft 2 through the sleeve oil inlet hole 101 enters the inner cavity 207 of the hook drive shaft 2 through the drive shaft oil inlet hole 201. The sealing assembly prevents the lubricating oil in the inner cavity 207 of the hook drive shaft 2 from being discharged through the drive shaft oil outlet hole 202 and entering the oil-free hook 4. Furthermore, the lubricating oil that enters the space between the hook drive sleeve 1 and the hook drive shaft 2 forms an oil film between the hook drive sleeve 1 and the hook drive shaft 2, thereby lubricating the hook drive sleeve 1 and the hook drive shaft 2 and absorbing the heat generated by the high-speed rotation of the hook drive shaft 2. The lubricating oil that has absorbed excess heat between the hook drive sleeve 1 and the hook drive shaft 2 returns through the sleeve oil return hole 102 to remove the heat generated by the high-speed rotation of the hook drive shaft 2. Therefore, this oil supply mechanism is also applicable to the oil-free hook 4. In summary, this oil supply mechanism is applicable to both the oiled and oil-free hooks 3 and 4, and has high versatility.

[0029] In one embodiment,

[0030] For the oil-filled rotary hook 3 , the rotary hook drive shaft 2 is detachably connected to an oil filter core 501 at the drive shaft oil outlet 202 . The oil filter core 501 is used to filter the lubricating oil discharged from the inner cavity 207 of the rotary hook drive shaft 2 .

[0031] In this way, for the oil-filled rotary hook 3, part of the lubricating oil that enters between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 through the sleeve oil inlet hole 101 enters the inner cavity 207 of the rotary hook drive shaft 2 through the drive shaft oil inlet hole 201, and is filtered by the oil filter core 501 at the drive shaft oil outlet hole 202, and then is discharged and enters the oil-filled rotary hook 3, thereby realizing the oil supply to the oil-filled rotary hook 3.

[0032] Preferably, if Figure 3 and Figure 4As shown, for the oil-filled rotary hook 3, an oil filter core positioning sleeve 502 is threadedly connected to the surface of the inner cavity 207 of the rotary hook drive shaft 2 at the drive shaft oil outlet hole 202. The oil filter core positioning sleeve 502 is hollow and has openings at both ends, and the opening size of one end of the oil filter core positioning sleeve 502 is larger than the opening size of the other end. The opening at one end of the oil filter core positioning sleeve 502 forms an inlet for the oil filter core 501 and the opening at the other end forms an oil outlet hole 50201 of the positioning sleeve. The oil filter core 501 extends into the oil filter core positioning sleeve 502 from the opening at one end of the oil filter core positioning sleeve 502 and is clamped at the other end.

[0033] In this way, for the oil-filled rotary hook 3, the lubricating oil entering the inner cavity 207 of the rotary hook drive shaft 2 is filtered by the oil filter core 501 at the drive shaft oil outlet hole 202, and then discharged through the positioning sleeve oil outlet hole 50201 and enters the oil-filled rotary hook 3, thereby realizing the oil supply to the oil-filled rotary hook 3; in addition, the oil filter core 501 can be conveniently arranged at the drive shaft oil outlet hole 202 by the oil filter core positioning sleeve 502, and the oil filter core 501 only needs to be inserted into the oil filter core positioning sleeve 502, so the assembly between the oil filter core 501 and the oil filter core positioning sleeve 502 is simple, and the oil filter core 501 can be easily replaced after being used for a period of time. In addition, the oil filter core positioning sleeve 502 only needs to be screwed on the surface of the inner cavity 207 of the rotary hook drive shaft 2 at the drive shaft oil outlet hole 202, so the assembly between the oil filter core positioning sleeve 502 and the rotary hook drive shaft 2 is simple, and the oil filter core positioning sleeve 502 is easy to remove from the rotary hook drive shaft 2.

[0034] In one embodiment,

[0035] The sealing and plugging assembly includes an oil-limiting bolt 6 , which is threadedly connected to the surface of the inner cavity 207 of the rotary hook driving shaft 2 at the driving shaft oil outlet hole 202 .

[0036] In this way, for the oil-free rotary hook 4, part of the lubricating oil that enters between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 through the sleeve oil inlet hole 101 enters the inner cavity 207 of the rotary hook drive shaft 2 through the drive shaft oil inlet hole 201, while the oil limiting bolt 6 prevents the lubricating oil in the inner cavity 207 of the rotary hook drive shaft 2 from being discharged through the drive shaft oil outlet hole 202 and entering the oil-free rotary hook 4.

[0037] Preferably, if Figure 5 and Figure 6As shown, the oil-limiting bolt 6 includes an oil-limiting bolt head 601 and an oil-limiting screw 602. The surface of the oil-limiting screw 602 adjacent to the oil-limiting bolt head 601 is smooth and is called the oil-limiting screw smooth surface section 60201. The surface of the remaining position of the oil-limiting screw 602 is provided with threads and is called the oil-limiting screw threaded section 60202. The oil-limiting screw smooth surface section 60201 is in the shape of a right truncated cone, and the size of the end of the oil-limiting screw smooth surface section 60201 connected to the oil-limiting screw threaded section 60202 is smaller than the size of the end connected to the oil-limiting bolt head 601. The surface of the inner cavity 207 of the rotary hook drive shaft 2 at the drive shaft oil outlet hole 202 that is adapted to the oil-limiting bolt head 601 is called the first inner cavity surface 203, and the surface corresponding to the segment of the oil-limiting screw smooth surface section 60201 adjacent to the oil-limiting bolt head 601 is called the second inner cavity surface 204. The surfaces corresponding to the remaining positions of 60201 are called third inner cavity surfaces 205, and the surface adapted to the oil-limiting screw threaded section 60202 is called fourth inner cavity surface 206, wherein the second inner cavity surface 204 is in the shape of a right truncated cone, and the dimension of the end of the second inner cavity surface 204 connected to the third inner cavity surface 205 is smaller than the dimension of the end connected to the first inner cavity surface 203, and the taper of the second inner cavity surface 204 is greater than the taper of the oil-limiting screw smooth section 60201; an O-ring 7 is sleeved on the outside of the segment of the oil-limiting screw smooth section 60201 adjacent to the oil-limiting bolt head 601, and the oil-limiting screw threaded section 60202 is screwed into place with the fourth inner cavity surface 206, and the O-ring 7 is squeezed through the segment of the oil-limiting screw smooth section 60201 adjacent to the oil-limiting bolt head 601 and cooperates with the second inner cavity surface 204 to achieve sealing.

[0038] As the oil-limiting screw threaded section 60202 of the oil-limiting bolt 6 is threadedly connected to the fourth inner cavity surface 206 of the rotary hook drive shaft 2, the O-ring 7 is squeezed by the section of the oil-limiting screw smooth section 60201 adjacent to the oil-limiting bolt head 601 and the second inner cavity surface 204 of the rotary hook drive shaft 2. As the oil-limiting bolt 6 is tightened, the distance between the section of the oil-limiting screw smooth section 60201 adjacent to the oil-limiting bolt head 601 and the second inner cavity surface 204 of the rotary hook drive shaft 2 gradually decreases, and the squeezing force on the O-ring 7 gradually increases, thereby achieving a seal. Therefore, the O-ring 7 and the oil-limiting bolt 6 cooperate to seal the oil outlet hole 202 of the drive shaft.

[0039] In one embodiment,

[0040] like Figure 2 、 Figure 3 and Figure 5As shown, the sleeve oil inlet hole 101 and the sleeve oil return hole 102 both extend from the outer circumference of the rotary hook drive sleeve 1 to the inner circumference, and the drive shaft oil inlet hole 201 extends from the outer circumference of the rotary hook drive shaft 2 to the surface of the inner cavity 207 of the rotary hook drive shaft 2; the drive shaft oil inlet hole 201 is located near the sleeve oil inlet hole 101.

[0041] In this way, the lubricating oil that enters between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 through the sleeve oil inlet hole 101 can easily enter the inner cavity 207 of the rotary hook drive shaft 2 through the drive shaft oil inlet hole 201.

[0042] Preferably, the sleeve oil inlet hole 101 and the sleeve oil return hole 102 are both arranged along the radial direction of the rotary hook drive sleeve 1 ; and the drive shaft oil inlet hole 201 is arranged along the radial direction of the rotary hook drive shaft 2 .

[0043] In one embodiment, the shaft sleeve oil inlet hole 101 is connected to the oil tank through an oil inlet pipe, and the shaft sleeve oil return hole 102 is connected to the oil tank through an oil return pipe. The lubricating oil in the oil tank is pumped by an oil pump, which is a vane pump, gear pump or plunger pump.

[0044] In this way, the lubricating oil in the oil tank enters the gap between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 through the oil inlet pipe and the sleeve oil inlet hole 101 in sequence under the pumping action of the oil pump. The lubricating oil between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 partially enters the inner cavity 207 of the rotary hook drive shaft 2 through the drive shaft oil inlet hole 201. The lubricating oil entering between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 also forms an oil film between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2, thereby lubricating the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 and absorbing the heat generated by the high-speed rotation of the rotary hook drive shaft 2. The lubricating oil between the rotary hook drive sleeve 1 and the rotary hook drive shaft 2 that has absorbed the excess heat returns to the oil tank through the sleeve oil return hole 102 and the oil return pipe in sequence, so as to take away the heat generated by the high-speed rotation of the rotary hook drive shaft 2.

[0045] In one embodiment, Figure 2 、 Figure 3 and Figure 5 As shown, both ends of the rotary hook drive sleeve 1 are sealedly connected to the rotary hook drive shaft 2 via spring sealing rings 8 .

[0046] A sewing machine comprises the above-mentioned oil supply mechanism for oil-filled and oil-free rotary hooks.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. An oil supply mechanism for oil-filled and oil-free rotary hooks, characterized by: The invention comprises a rotary hook drive sleeve (1), a hollow rotary hook drive shaft (2) is inserted into the rotary hook drive sleeve (1), both ends of the rotary hook drive sleeve (1) are respectively sealedly connected to the rotary hook drive shaft (2), the rotary hook drive sleeve (1) is provided with a sleeve oil inlet hole (101) and a sleeve oil return hole (102), the rotary hook drive shaft (2) is provided with a drive shaft oil inlet hole (201) connected to the sleeve oil inlet hole (101), and the rotary hook drive shaft (2) is connected to the oil-returning rotary hook. One end connected to the shuttle (3) or the oil-free rotary shuttle (4) is open and forms a drive shaft oil outlet hole (202); for the oil-containing rotary shuttle (3), the drive shaft oil outlet hole (202) is used to discharge the lubricating oil entering the inner cavity (207) of the rotary shuttle drive shaft (2) and enter the oil-containing rotary shuttle (3); for the oil-free rotary shuttle (4), the rotary shuttle drive shaft (2) is detachably connected to a sealing and blocking component at the drive shaft oil outlet hole (202) for sealing and blocking the drive shaft oil outlet hole (202).

2. The oil supply mechanism for oil-filled and oil-free rotary hooks according to claim 1, characterized in that: For an oil-filled rotary hook (3), the rotary hook drive shaft (2) is detachably connected to an oil filter core (501) at the drive shaft oil outlet hole (202), and the oil filter core (501) is used to filter the lubricating oil discharged from the inner cavity (207) of the rotary hook drive shaft (2).

3. The oil supply mechanism for oil-filled and oil-free rotary hooks according to claim 2, characterized in that: For an oil rotary hook (3), an oil filter core positioning sleeve (502) is threadedly connected to the surface of the inner cavity (207) of the rotary hook driving shaft (2) at the oil outlet hole (202) of the driving shaft. The oil filter core positioning sleeve (502) is hollow and has openings at both ends. The opening size of one end of the oil filter core positioning sleeve (502) is larger than the opening size of the other end. The opening at one end of the oil filter core positioning sleeve (502) forms an inlet for the oil filter core (501) and the opening at the other end forms an oil outlet hole (50201) of the positioning sleeve. The oil filter core (501) extends into the oil filter core positioning sleeve (502) from the opening at one end of the oil filter core positioning sleeve (502) and is clamped at the other end.

4. The oil supply mechanism for oil-filled and oil-free rotary hooks according to claim 1, characterized in that: The sealing and plugging assembly comprises an oil-limiting bolt (6), which is threadedly connected to the surface of the inner cavity (207) of the rotary shuttle drive shaft (2) at the drive shaft oil outlet hole (202).

5. The oil supply mechanism for oil-filled and oil-free rotary hooks according to claim 4, characterized in that: The oil-limiting bolt (6) comprises an oil-limiting bolt head (601) and an oil-limiting screw (602); the surface of the oil-limiting screw (602) adjacent to the oil-limiting bolt head (601) is smooth and is referred to as the oil-limiting screw smooth surface section (60201); the surface of the remaining position of the oil-limiting screw (602) is provided with threads and is referred to as the oil-limiting screw thread section (60202); the oil-limiting screw smooth surface section (60201) is in the shape of a right truncated cone, and the size of one end of the oil-limiting screw smooth surface section (60201) connected to the oil-limiting screw thread section (60202) is smaller than the size of one end connected to the oil-limiting bolt head (601); The surface on the inner cavity (207) of the rotary hook drive shaft (2) at the drive shaft oil outlet hole (202) that matches the oil limiting bolt head (601) is called the first inner cavity surface (203), the surface corresponding to the segment of the oil limiting screw smooth section (60201) adjacent to the oil limiting bolt head (601) is called the second inner cavity surface (204), and the surfaces corresponding to the remaining positions of the oil limiting screw smooth section (60201) are called the third inner cavity surface (205). 05), the surface adapted to the oil-limiting screw thread segment (60202) is called the fourth inner cavity surface (206), wherein the second inner cavity surface (204) is in the shape of a right truncated cone, and the dimension of the end of the second inner cavity surface (204) connected to the third inner cavity surface (205) is smaller than the dimension of the end connected to the first inner cavity surface (203), and the taper of the second inner cavity surface (204) is greater than the taper of the oil-limiting screw smooth segment (60201); An O-type sealing ring (7) is sleeved on the outer side of the segment of the oil-limiting screw smooth section (60201) adjacent to the oil-limiting bolt head (601), and the oil-limiting screw threaded section (60202) is screwed into place with the fourth inner cavity surface (206). The O-type sealing ring (7) is squeezed through the segment of the oil-limiting screw smooth section (60201) adjacent to the oil-limiting bolt head (601) and the second inner cavity surface (204) to achieve sealing.

6. The oil supply mechanism for oil-filled and oil-free rotary hooks according to claim 1, characterized in that: The shaft sleeve oil inlet hole (101) and the shaft sleeve oil return hole (102) both extend from the outer peripheral surface of the rotary hook drive shaft sleeve (1) to the inner peripheral surface, and the drive shaft oil inlet hole (201) extends from the outer peripheral surface of the rotary hook drive shaft (2) to the surface of the inner cavity (207) of the rotary hook drive shaft (2); the drive shaft oil inlet hole (201) is located near the shaft sleeve oil inlet hole (101).

7. The oil supply mechanism for oil-filled and oil-free rotary hooks according to claim 6, characterized in that: The shaft sleeve oil inlet hole (101) and the shaft sleeve oil return hole (102) are both arranged along the radial direction of the rotary hook drive shaft sleeve (1); and the drive shaft oil inlet hole (201) is arranged along the radial direction of the rotary hook drive shaft (2).

8. The oil supply mechanism for oil-filled and oil-free rotary hooks according to claim 1, characterized in that: The shaft sleeve oil inlet hole (101) is connected to the oil tank via an oil inlet pipe, and the shaft sleeve oil return hole (102) is connected to the oil tank via an oil return pipe. The lubricating oil in the oil tank is pumped by an oil pump, which is a vane pump, a gear pump or a plunger pump.

9. The oil supply mechanism for oil-filled and oil-free rotary hooks according to claim 1, characterized in that: Both ends of the rotary hook drive sleeve (1) are sealed and connected to the rotary hook drive shaft (2) via spring sealing rings (8).

10. A sewing machine, characterized in that: The invention comprises the oil supply mechanism for oil-filled rotary hook and oil-free rotary hook as described in any one of claims 1 to 9.

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