Rotating shuttle oil supply mechanism in sewing machine

Abstract

The utility model relates to a rotating shuttle oil supply mechanism in a sewing machine, the sewing machine comprises a rotating shuttle assembly, a rotating shuttle sleeve, a lower shaft sleeve and a lower shaft, the lower shaft sleeve is sleeved on the lower shaft, the rotating shuttle sleeve is sleeved on the lower shaft, and two ends of the rotating shuttle sleeve are respectively connected with the rotating shuttle assembly and the lower shaft sleeve; the rotating shuttle oil supply mechanism comprises an oil box and an oil line, and further comprises a buffer oil cavity formed in the lower shaft sleeve, oil storage cotton arranged in the lower shaft sleeve and connected with the buffer oil cavity, and an active oil supply assembly connected with the buffer oil cavity and the oil box, and the active oil supply assembly can convey oil in the oil box to the buffer oil cavity; the first end of the oil line is in contact with the oil storage cotton, and the second end of the oil line penetrates through the rotating shuttle sleeve and is in contact with the rotating shuttle assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing equipment, in particular to a rotary hook oil supply mechanism in a sewing machine. Background Art

[0002] In sewing equipment like the 1790 buttonholer, the rotary hook currently uses an oil line to supply oil. One end of the oil line is placed in an oil reservoir, using a passive oil supply method. The oil line utilizes the capillary action of the oil line to directly draw oil from the oil reservoir and ultimately deliver it to the hook, where it contacts the hook for oil supply. As the hook rotates, lubricating oil is continuously supplied to the hook through the oil line, lubricating and cooling it, ensuring stable performance during long, high-speed operation. The biggest problem with this existing oil supply method is that the long oil line draws oil from the oil reservoir, making it difficult to effectively control the oil output. For example, as room temperature increases, the oil's fluidity increases, and without regulation, the oil output increases, which can easily lead to oil contamination of the fabric. Because the oil line draws and delivers oil from the oil reservoir through the capillary action of the oil line, the oil line and its internal oil line age over time, and the oil output becomes unstable. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a hook oil supply mechanism in a sewing machine, which can stably supply oil to the hook and is more accurately and simply controlled.

[0004] To achieve the above-mentioned purpose, the utility model provides a rotary hook oil supply mechanism in a sewing machine, the sewing machine comprising a rotary hook assembly, a rotary hook sleeve, a lower shaft sleeve and a lower shaft, the lower shaft sleeve being sleeved on the lower shaft, the rotary hook sleeve being sleeved on the lower shaft, and the two ends of the rotary hook sleeve being respectively connected to the rotary hook assembly and the lower shaft sleeve; the rotary hook oil supply mechanism comprises an oil box and an oil line, and also comprises a buffer oil chamber arranged in the lower shaft sleeve, an oil storage cotton arranged in the lower shaft sleeve and connected to the buffer oil chamber, and an active oil delivery assembly connecting the buffer oil chamber and the oil box, the active oil delivery assembly being capable of delivering oil in the oil box to the buffer oil chamber; the oil line is provided with a first end in contact with the oil storage cotton, and a second end passing through the interior of the rotary hook sleeve and in contact with the rotary hook assembly.

[0005] Furthermore, the buffer oil chamber is arranged between the inner hole of the lower shaft sleeve and the lower shaft.

[0006] Furthermore, it also includes a sealing gasket arranged in the lower shaft sleeve and sleeved on the lower shaft; the oil storage cotton is sleeved on the lower shaft, and the cache oil cavity is located between the oil storage cotton and the sealing gasket.

[0007] Furthermore, the active oil delivery assembly includes an oil pump, an oil inlet pipe and an oil outlet pipe, the two ends of the oil inlet pipe are respectively connected to the oil pump inlet and the oil box, the first end of the oil outlet pipe is connected to the oil pump inlet, and the second end is connected to the cache oil chamber.

[0008] Furthermore, the oil pump is an electromagnetic pump.

[0009] Furthermore, the oil pump is connected to the electronic control system of the sewing machine.

[0010] Furthermore, the active oil delivery assembly also includes a joint and an oil pipe terminal. The oil pipe terminal is installed on the lower shaft sleeve and extends into the buffer oil chamber. The two ends of the joint are respectively connected to the oil pipe terminal and the second end of the oil outlet pipe.

[0011] Furthermore, the oil line has an inclined line segment near the second end side, and the distance between the inclined line segment and the lower axis gradually increases along the direction from the first end side to the second end side of the oil line.

[0012] Furthermore, the oil line includes an axially extending line segment located between the first end and the inclined line segment and extending along the axial straight line of the lower shaft.

[0013] Furthermore, an oil line arrangement channel for the oil line to pass through is provided in the rotary hook sleeve.

[0014] As described above, the rotary hook oil supply mechanism of the present invention has the following beneficial effects:

[0015] 1. By providing a buffer oil chamber and oil reservoir within the lower shaft sleeve, and installing an active oil delivery assembly connecting the buffer oil chamber and the oil box, the active oil delivery assembly actively supplies oil to the buffer oil chamber. Compared to the method of sucking oil through an oil line, this method can ensure stable oil output and prevent external factors from affecting it. It can also actively adjust parameters such as oil delivery volume and oil delivery frequency, making it more effective and simple. At the same time, the oil supply length of the oil line is shortened. Oil only needs to be delivered from the oil reservoir on one side of the hook sleeve to the hook assembly on the other side, which can reduce the impact of excessively long oil lines.

[0016] 2. The active oil delivery component delivers oil through an electromagnetic pump, which can well control the frequency of intermittent oil delivery by the electromagnetic pump and the amount of oil each time, making it more effective and convenient to adjust the oil amount.

[0017] 3. By setting the inclined line segment and the axially extended line segment, the oil line can better transport the oil to the hook assembly by using the centrifugal force when the hook assembly and the hook sleeve rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the rotary hook oil supply mechanism of the utility model.

[0019] Figure 2 This is a schematic diagram of the bottom side of the rotary hook oil supply mechanism of the present invention.

[0020] Figure 3 This is an exploded view of the rotary hook oil supply mechanism of the utility model.

[0021] Figure 4 It is a partial cross-sectional view of the rotary hook oil supply mechanism of the utility model.

[0022] Figure 5 for Figure 4 Enlarged view of circle A in .

[0023] Explanation of Figure Numbers

[0024] 1 Hook assembly

[0025] 2 Hook sleeve

[0026] 3 Oil lines

[0027] 301 Axially extended segment

[0028] 302 inclined line segment

[0029] 4 Oil storage cotton

[0030] 5. Sealing gasket

[0031] 6 Lower shaft sleeve

[0032] 601 Buffer Oil Chamber

[0033] 7 Lower shaft

[0034] 8 Oil pipe terminal

[0035] 9 connectors

[0036] 10 Oil inlet pipe

[0037] 11 Mounting Block

[0038] 12 oil box

[0039] 13 oil outlet pipe

[0040] 14 Oil pump

[0041] 15 Lower section of the casing DETAILED DESCRIPTION

[0042] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0043] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification for the understanding and reading of those familiar with this technology, and are not used to limit the conditions for the implementation of this utility model. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose of the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of this utility model without substantially changing the technical content.

[0044] See also Figures 1 to 5 The utility model provides a rotary hook oil supply mechanism in a sewing machine, which includes a rotary hook assembly 1, a rotary hook sleeve 2, a lower shaft sleeve 6 and a lower shaft 7. The lower shaft sleeve 6 is sleeved on the lower shaft 7, and the rotary hook sleeve 2 is sleeved on the lower shaft 7. The two ends of the rotary hook sleeve 2 are respectively connected to the rotary hook assembly 1 and the lower shaft sleeve 6. The rotary hook assembly 1 and the rotary hook sleeve 2 are integrally mounted on the lower shaft 7 and driven to rotate by the lower shaft 7. The lower shaft sleeve 6 does not rotate with the lower shaft 7. The above part is an existing conventional structure in a sewing machine. The rotary hook oil supply mechanism of the present invention includes an oil box 12 and an oil line 3, and also includes a buffer oil chamber 601 arranged in the lower shaft sleeve 6, an oil storage cotton 4 arranged in the lower shaft sleeve 6 and connected to the buffer oil chamber 601, and an active oil delivery component connecting the buffer oil chamber 601 and the oil box 12, and the active oil delivery component can deliver the oil in the oil box 12 to the buffer oil chamber 601; the oil line 3 is provided with a first end in contact with the oil storage cotton 4, and a second end passing through the interior of the rotary hook sleeve 2 and in contact with the rotary hook assembly 1.

[0045] The main operating principle of the rotary hook oil supply mechanism of the present invention is as follows: During operation, an active oil delivery assembly delivers oil from the oil box 12 to the buffer oil chamber 601 within the lower shaft sleeve 6 and then to the oil reservoir 4. The oil line 3, through capillary action, delivers the oil from the oil reservoir 4 to the rotary hook assembly 1, thereby lubricating and cooling the rotary hook assembly 1. Compared to a method that draws oil through the oil line 3, the active oil delivery assembly ensures a stable oil output, protects against external influences, and allows for active adjustment of conditions such as the oil delivery volume and frequency. Furthermore, the oil line 3 only needs to deliver oil from the oil reservoir 4 on one side of the rotary hook sleeve 2 to the rotary hook assembly 1 on the other side. This shortens the delivery path and the required length of the oil line 3, thereby reducing the impact of aging or other problems on the oil supply caused by an overly long oil line 3. The rotary hook oil supply mechanism of the present invention can be used in buttonhole sewing machines or other types of sewing machines.

[0046] See also Figures 1 to 5The present invention is further described below with a specific embodiment:

[0047] In this embodiment, see Figure 4 and Figure 5 As a preferred design, the cache oil chamber 601 is arranged between the lower shaft sleeve 6 and the lower shaft 7, that is, the inner hole of the lower shaft sleeve 6 has a section with a larger gap with the lower shaft 7, and the annular space between the inner hole of this section and the lower shaft 7 constitutes the cache oil chamber 601. Furthermore, it also includes a sealing gasket 5 arranged in the lower shaft sleeve 6 and sleeved on the lower shaft 7, and the oil storage cotton 4 is sleeved on the lower shaft 7. The cache oil chamber 601 is located between the oil storage cotton 4 and the sealing gasket 5. The sealing gasket 5 is in sealing contact with the inner hole of the lower shaft sleeve 6 and the lower shaft 7, and is used to seal one side of the cache oil chamber 601; one side of the cache oil chamber 601 can be sealed directly by the oil storage cotton 4, that is, the oil storage cotton 4 is in sealing contact with the inner hole of the lower shaft sleeve 6 and the lower shaft 7 to avoid leakage. The sealing ring can also be used for sealing on this side, and a through hole is opened on the sealing ring to connect with the oil storage cotton 4, so that the oil in the cache oil chamber 601 can smoothly enter the oil storage cotton 4.

[0048] In this embodiment, see Figure 1 、 Figure 2 and Figure 5 As a preferred design, the active oil delivery component includes an oil pump 14, an oil inlet pipe 10 and an oil outlet pipe 13. The two ends of the oil inlet pipe 10 are respectively connected to the inlet of the oil pump 14 and the oil box 12. The first end of the oil outlet pipe 13 is connected to the inlet of the oil pump 14, and the second end is connected to the buffer oil chamber 601. The oil pump 14 is preferably a miniature electromagnetic pump, which is fixedly mounted on the lower section 15 of the sewing machine casing through a mounting base 11. The oil box 12 and the lower shaft sleeve 6 are also mounted on the lower section 15 of the casing. The electromagnetic pump is connected to the electronic control system of the sewing machine. When in use, the electromagnetic pump is controlled by the electronic control system, which can well control the frequency of intermittent oil delivery of the electromagnetic pump and the amount of oil each time, making it more effective and convenient to adjust the oil amount. Furthermore, the active oil delivery component also includes a connector 9 and an oil pipe terminal 8. The oil pipe terminal 8 is installed on the lower shaft sleeve 6 and extends into the buffer oil chamber 601. The two ends of the connector 9 are respectively connected to the oil pipe terminal 8 and the second end of the oil outlet pipe 13. By setting the connector 9 and the oil pipe terminal 8, it can be better connected to the lower shaft sleeve 6 and connected to the buffer oil chamber 601, which is convenient for maintenance.

[0049] In this embodiment, see Figure 4 and Figure 5As a preferred design, the oil line 3 has an inclined line segment 302 near the second end. The distance between the inclined line segment 302 and the lower shaft 7 gradually increases from the first end to the second end of the oil line 3. In other words, the inclined line segment 302 is inclined relative to the lower shaft 7, extending axially along the lower shaft 7 and radially. The closer it is to the hook assembly 1, the farther it is from the lower shaft 7. The inclined line segment 302 itself can be a straight line or a curved line. The portion of the oil line 3 between the first end and the inclined line segment 302 is an axially extending line segment 301, see Figure 5 The axially extending segment 301 extends linearly in the axial direction of the lower shaft 7 and is positioned as close to the lower shaft 7 as possible. Furthermore, the hook sleeve 2 is provided with an oil line 3 arrangement channel for the oil line 3 to pass through. This arrangement stabilizes the position of the oil line 3, particularly the position of the inclined segment 302. With this design, during operation, as the hook rotates, the oil line 3 rotates with the hook sleeve 2. Centrifugal force effectively transfers the oil in the inclined segment 302 to the hook sleeve 2, enabling the oil line 3 to effectively deliver the oil stored in the oil reservoir 4 to the hook assembly 1. The provision of the axially extending segment 301 ensures that the inclined segment 302 has a specific and appropriate inclination angle.

[0050] As can be seen from the above, the rotary hook oil supply mechanism of the present invention has the following beneficial effects:

[0051] 1. By providing a buffer oil chamber 601 and oil reservoir 4 within the lower shaft sleeve 6, and providing an active oil delivery assembly connecting the buffer oil chamber 601 and the oil box 12, the active oil delivery assembly actively supplies oil to the buffer oil chamber 601. Compared to the method of sucking oil through the oil line 3, this method ensures a stable oil output and prevents external factors from affecting it. It also allows for active adjustment of parameters such as the oil delivery volume and frequency, making it more efficient and simple. Furthermore, the oil supply length of the oil line 3 is shortened, requiring only oil to be delivered from the oil reservoir 4 on one side of the hook sleeve 2 to the hook assembly 1 on the other side, thus reducing the impact of an overly long oil line 3.

[0052] 2. The active oil delivery component delivers oil through an electromagnetic pump, which can well control the frequency of intermittent oil delivery by the electromagnetic pump and the amount of oil each time, making it more effective and convenient to adjust the oil amount.

[0053] 3. The oil line 3 is provided with an inclined line segment 302 and an axially extending line segment 301 , so that when the rotary hook assembly 1 and the rotary hook sleeve 2 rotate, the oil can be better transported to the rotary hook assembly 1 by means of centrifugal force.

[0054] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0055] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A rotary hook oil supply mechanism in a sewing machine, the sewing machine comprising a rotary hook assembly (1), a rotary hook sleeve (2), a lower shaft sleeve (6) and a lower shaft (7), wherein the lower shaft sleeve (6) is sleeved on the lower shaft (7), the rotary hook sleeve (2) is sleeved on the lower shaft (7), and both ends of the rotary hook sleeve (2) are connected to the rotary hook assembly (1) and the lower shaft sleeve (6), respectively; the rotary hook oil supply mechanism comprises an oil box (12) and an oil line (3), and is characterized in that: The oil pump further comprises a buffer oil chamber (601) arranged in the lower shaft sleeve (6), an oil storage cotton (4) arranged in the lower shaft sleeve (6) and connected to the buffer oil chamber (601), and an active oil delivery assembly connecting the buffer oil chamber (601) and the oil box (12), wherein the active oil delivery assembly is capable of delivering oil in the oil box (12) to the buffer oil chamber (601); the oil line (3) is provided with a first end in contact with the oil storage cotton (4), and a second end passing through the interior of the rotary hook sleeve (2) and in contact with the rotary hook assembly (1).

2. The hook oil supply mechanism in a sewing machine according to claim 1, characterized in that: The buffer oil chamber (601) is arranged between the inner hole of the lower shaft sleeve (6) and the lower shaft (7).

3. The hook oil supply mechanism in a sewing machine according to claim 2, characterized in that: It also includes a sealing gasket (5) arranged in the lower shaft sleeve (6) and sleeved on the lower shaft (7); the oil storage cotton (4) is sleeved on the lower shaft (7), and the buffer oil cavity (601) is located between the oil storage cotton (4) and the sealing gasket (5).

4. The hook oil supply mechanism for a sewing machine according to claim 1 or 2, characterized in that: The active oil delivery assembly comprises an oil pump (14), an oil inlet pipe (10) and an oil outlet pipe (13); the two ends of the oil inlet pipe (10) are respectively connected to the inlet of the oil pump (14) and the oil box (12); the first end of the oil outlet pipe (13) is connected to the inlet of the oil pump (14), and the second end is connected to the buffer oil chamber (601).

5. The hook oil supply mechanism for a sewing machine according to claim 4, characterized in that: The oil pump (14) is an electromagnetic pump.

6. The hook oil supply mechanism for a sewing machine according to claim 5, characterized in that: The oil pump (14) is connected to the electric control system of the sewing machine.

7. The hook oil supply mechanism for a sewing machine according to claim 4, characterized in that: The active oil delivery assembly further comprises a joint (9) and an oil pipe terminal (8), wherein the oil pipe terminal (8) is mounted on the lower shaft sleeve (6) and extends into the buffer oil chamber (601), and the two ends of the joint (9) are respectively connected to the oil pipe terminal (8) and the second end of the oil outlet pipe (13).

8. The hook oil supply mechanism for a sewing machine according to claim 1, wherein: The oil line (3) has an inclined line segment (302) near the second end side, and the distance between the inclined line segment (302) and the lower shaft (7) gradually increases along the direction from the first end side to the second end side of the oil line (3).

9. The hook oil supply mechanism for a sewing machine according to claim 8, characterized in that: The oil line (3) comprises an axially extending line segment (301) located between the first end and the inclined line segment and extending in a straight axial direction along the lower shaft (7).

10. The hook oil supply mechanism in a sewing machine according to claim 1 or 8, characterized in that: An oil line arrangement channel for the oil line (3) to pass through is provided in the rotary hook sleeve (2).

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