WO2016078628A1

WO2016078628A1 - Transmission mechanism, sewing machine and method for transmission mechanism lubrication

Info

Publication number: WO2016078628A1
Application number: PCT/CN2016/070853
Authority: WO
Inventors: 林粉娇
Original assignee: 中山市旋霸缝纫设备有限公司
Priority date: 2014-11-17
Filing date: 2016-01-14
Publication date: 2016-05-26
Also published as: CN104313804B; CN104313804A

Abstract

A transmission mechanism, a sewing machine, and a method for lubrication of said transmission mechanism. The transmission mechanism (1) comprises bushings (2) and a drive shaft (3), the drive shaft (3) passing through the bushings (2) and being able to rotate relative thereto; a lubrication assembly is provided upon the drive shaft (3), and on the outside wall of said lubrication assembly is provided a sliding component (36) matched to a gap between the bushings (2); within the lubrication assembly is provided a substantially sealed lubricant cavity (322), said cavity (322) communicating with the sliding component (36) by means of a lubricant passage. The sewing machine is equipped with the described transmission mechanism (1).

Description

Lubrication method for transmission mechanism, sewing machine and transmission mechanism

Technical field

The present invention relates to the field of sewing machine equipment, and more particularly to a transmission mechanism, and a sewing machine equipped with the transmission mechanism, and a lubrication method of the transmission mechanism. The present application is based on a Chinese patent application filed on Nov. 17, 2014, the entire disclosure of which is hereby incorporated by reference.

Background technique

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on a sewing material to interlace or stitch one or more layers of sewing material. The sewing machine can sew cotton, linen, silk, wool, rayon and other fabrics and leather, plastic, paper and other products. The stitches are neat and beautiful, flat and firm, and the sewing speed is fast and easy to use.

The sewing machine is provided with a hook on the lower side of the needle plate. The hook includes an outer shuttle and an inner shuttle. The outer shuttle rotates integrally with the shaft as the needle moves up and down, and rotatably supports the inner shuttle. The inner shuttle can rotate independently of the outer shuttle and includes a shuttle at its outer peripheral portion. The shuttle portion is engaged with the stop shuttle included in the sewing machine for stopping the rotation of the inner shuttle frame so that the inner shuttle frame does not rotate synchronously with the outer shuttle frame. The needle thread of the needle thread is inserted into the needle. The outer shuttle of the sewing machine captures the upper thread of the needle passing through the fabric, and the upper thread is interlaced with the bottom thread held by the inner shuttle in the stopped state to perform sewing.

When the sewing machine is working, it is generally used to set the motor on the sewing machine. The motor outputs the rotary driving force to the outer shuttle frame and the needle, and the outer shuttle frame is rotated, and the needle is reciprocated up and down. Therefore, after the output of the motor is required, The gears and the transmission mechanism are increased, and the driving force is output to the outer shuttle frame and the needle through the gears and the transmission mechanism. However, the transmission shaft and the bushing on the transmission mechanism need to be coated with lubricating oil, and the lubricating oil will wear out after a long time of use, and in order to realize the long-term rotation work of the transmission mechanism, it is necessary to set the continuous oil supply. system. Specifically, an oil supply pipe is disposed at a position where the sleeve and the transmission shaft are matched with each other, and a positive pressure is applied by the oil pump at a distal end of the oil supply pipe, so that the lubricating oil passes through the oil supply pipe under the force of the positive pressure The position of the clearance fit is ejected to achieve continuous oil supply.

Then, because the pressure of the oil pump is not easy to achieve precise control, if the oil pressure is too large, there will be external spray or leakage of the lubricating oil, which will cause serious pollution to the textile fabric. If the oil pressure is too small, the lubrication will be caused. Insufficient oil supply, that is, the friction between the transmission mechanism, the bushing or the gear will suddenly increase, causing great wear between the transmission mechanism, the bushing or the gear, thereby seriously affecting the service life of the sewing machine.

technical problem

In order to solve the above problems, it is a first object of the present invention to provide a transmission mechanism that can accurately supply oil and avoid oil leakage.

A second object of the present invention is to provide a sewing machine which can accurately supply oil and avoid oil leakage.

A third object of the present invention is to provide a lubricating method for a transmission mechanism that can accurately supply oil and avoid oil leakage.

Technical solution

In order to achieve the first object of the present invention, the present invention provides a transmission mechanism including a sleeve and a transmission shaft, the transmission shaft passing through the sleeve, the transmission shaft being rotatable relative to the sleeve, wherein the lubrication assembly is disposed on the transmission shaft The outer wall of the lubricating component is provided with a sliding portion that is matched with the sleeve, and the lubricating assembly is provided with a substantially sealed oil storage chamber, and the oil storage chamber communicates with the sliding portion through the oil passage.

A further solution is that the oil passage is at least one opening formed in the outer wall of the lubrication assembly.

A further solution is that an oil storage tank is opened on the sliding portion, and the oil storage tank is connected to the oil storage chamber through the oil passage.

In a further aspect, the oil reservoir is provided with an opening, and the opening is provided with a seal.

A further solution is that the oil reservoir is offset from the central axis of the drive shaft.

In order to achieve the second object of the present invention, the present invention provides a sewing machine including a motor for outputting a rotational driving force and a transmission mechanism for outputting a rotational driving force to the rotary hook, the transmission mechanism including the sleeve and the transmission shaft, and the transmission The shaft passes through the sleeve, and the transmission shaft is rotatable relative to the sleeve. The lubricating shaft is provided with a lubricating assembly. The outer wall of the lubricating assembly is provided with a sliding portion that is matched with the sleeve, and the lubricating assembly is provided with a substantially sealed storage. In the oil chamber, the oil storage chamber communicates with the sliding portion through the oil passage.

In order to achieve the third object of the present invention, the present invention provides a lubrication method for a transmission mechanism, wherein the transmission mechanism includes a relatively rotatable sleeve and a transmission shaft, and a lubrication assembly is disposed on the transmission shaft, and the lubrication assembly is provided with the shaft The lubricating portion is provided with a substantially closed oil storage chamber containing lubricating oil, and the oil storage chamber communicates with the sliding portion through the oil passage. The lubrication method of the transmission mechanism includes: lubricating oil with the rotation of the transmission shaft It is output to the sliding portion through the oil passage under the action of centrifugal force.

Beneficial effect

The lubricating mechanism of the transmission mechanism, the sewing machine and the transmission mechanism provided by the invention has a substantially closed oil storage chamber provided in the lubrication assembly, and is connected between the sliding portion and the oil storage chamber through the oil passage which is only the lubricating oil outlet. When the shaft rotates, the drive shaft drives the lubricating assembly to rotate integrally, and the liquid lubricating oil inside the oil storage chamber is also accompanied by the rotation, and the rotation of the lubricating oil generates centrifugal force, thereby causing a positive pressure along the radial direction to be applied. The lubricating oil, in turn, allows the lubricating oil to be output to the sliding portion through the oil passage under the force of the positive pressure, while being attached to the surfaces of the sleeve and the sliding portion to provide lubrication for the rotation of the transmission shaft. Since the oil pressure provided by the oil pump commonly used in the prior art is no longer used, the present invention uses the lubricating oil in the substantially closed oil storage chamber, and the positive pressure generated by the centrifugal force of the lubricating oil, when the transmission shaft runs at a high speed. At the time, more lubricating oil is needed. At this time, the centrifugal force generated by the faster rotation speed also increases, so the positive pressure applied to the lubricating oil also increases, and then more lubricating oil will be from the oil circuit. Output to the sliding portion to lubricate the rotation of the drive shaft. When the drive shaft is running at a low speed, less lubricating oil is required, and the centrifugal force generated by the slower rotation speed is also reduced, so that less lubricating oil will seep out from the oil passage, and when the transmission shaft stops rotating, Since there is no centrifugal force, and since the lubricating oil is disposed in the closed cavity, the lubricating oil will not leak out under the action of the air pressure. By automatically adjusting the oil pressure by using different rotational speeds, accurate oil supply to the sliding portion of the transmission shaft is realized, thereby avoiding excessive lubricating oil contaminating the laundry or too little lubricating oil affecting the normal use of the transmission mechanism. Since the existing complicated oil supply pipeline and oil supply system are no longer needed, the maintenance cost is reduced, and the simple structure of the transmission mechanism and the sewing machine of the invention is more favorable for improving production efficiency.

In addition, the oil passage provided in the outer wall serves as the oil passage of the lubricating oil, so that no additional components need to be added to the outer shuttle frame, and the lubricating oil can be accurately transmitted to the sliding portion that is matched with the sleeve by the internal oil passage. It is also possible to open a plurality of holes in the outer wall and evenly distribute the plurality of holes, thereby facilitating more uniform output of the lubricating oil to the sliding portion, thereby improving the lubrication performance of the transmission mechanism, reducing unnecessary frictional resistance, and improving Transmission efficiency.

Moreover, the oil storage tank is opened on the sliding portion, so that a part of the lubricating oil in the oil storage chamber is output to the oil storage tank through the oil passage, and the oil storage tank has an opening toward the inner wall of the sleeve, and the opening of the oil storage tank has an area larger than that of the opening of the tunnel. The large area allows the inner wall of the sleeve to be in contact with the lubricating oil stored in the oil reservoir of the larger opening, which in turn further improves the lubrication effect, reduces unnecessary frictional resistance, and improves transmission efficiency.

In addition, since the lubricating oil stored in the oil storage chamber will be exhausted after the transmission mechanism is used for a certain period of time or after a certain number of turns, it is necessary to provide an opening for filling the lubricating oil, and the sealing member is sealed after the filling is completed. The ground is mounted on the opening such that the oil reservoir is a substantially closed cavity.

In addition, the arrangement of the oil storage chamber offset from the central axis of rotation is advantageous for increasing the radius of rotation of the lubricating oil, thereby increasing the hydraulic pressure by increasing the centrifugal force, thereby improving the lubricating effect.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a structural view showing a first embodiment of a transmission mechanism of the present invention.

Figure 2 is a partial exploded view of the first embodiment of the transmission mechanism of the present invention.

Figure 3 is a structural view of a lubricating assembly in the first embodiment of the transmission mechanism of the present invention.

Figure 4 is a structural view showing a seal member and a communication member in the first embodiment of the transmission mechanism of the present invention.

Figure 5 is a cross-sectional view of the lubricating assembly of the first embodiment of the transmission mechanism of the present invention.

Figure 6 is a cross-sectional view showing a first embodiment of the transmission mechanism of the present invention.

Figure 7 is a cross-sectional view showing a second embodiment of the transmission mechanism of the present invention.

Figure 8 is a structural view showing an embodiment of a sewing machine of the present invention.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiments of the invention

The first embodiment of the transmission mechanism:

1 and 2, FIG. 1 is a structural view of the transmission mechanism 1, and FIG. 2 is an exploded perspective view of the transmission mechanism 1. The transmission mechanism 1 includes a bushing 2 and a drive shaft 3 that passes through the bushing 2 and independently rotates about the axis of the bushing 2. The drive shaft 3 includes a rod body 31 and a lubrication assembly mounted outside the rod body, and the lubrication assembly includes an lubrication frame 32, a seal member 33, a seal member 34, and a communication member 35 (see Fig. 4).

Referring to Figure 3, Figure 3 is a structural view of the lubrication frame 32. The lubricating frame 32 is disposed in a rotating body, and a positioning hole 321 is formed through the axis of the lubricating frame 32. The oil storage chamber 322 is opened through the axis outside the positioning hole 321 . The oil storage chamber 322 extends substantially in the circumferential direction. Ring groove.

Referring to Fig. 4, Fig. 4 is a structural view of the sealing member 33, the sealing member 34, and the communicating member 35. The communication member 35 is disposed substantially in a ring shape, and a communication groove 351 and a communication groove 352 are formed in the outer peripheral wall of the communication member 35. The communication groove 351 and the communication groove 352 are symmetrically disposed, and are radially extended on the outer peripheral wall of the communication member 35. A positioning slot 353 is provided. Both the seal 33 and the seal 34 are annularly disposed.

Referring to Figure 5, Figure 5 is a cross-sectional view of the lubrication frame 32 and the communication member 35. The communication member 35 is disposed at a middle portion of the oil reservoir 322, and the communication member 35 is adjacent to the inner wall of the oil reservoir 322. Since the communication member 35 is provided with the communication groove 351 and the communication groove 352, the communication member 35 is in the reinforcement lubrication frame 32. At the same time as the structural rigidity, the communication groove 322 located at both axial sides of the communication member 35 is communicated by the communication groove 351 and the communication groove 352.

Referring to Figure 6 in conjunction with Figures 5, 3 and 2, Figure 6 is a cross-sectional view of the transmission mechanism 1. The rod body 31 passes through the positioning hole 321 and is fixedly coupled to the positioning hole 321. A first opening and a second opening are provided on both axial ends of the lubrication frame 32, a seal 33 is mounted at the first opening, and a seal 34 is mounted at the second opening. A third opening is formed in a position where the outer wall of the lubrication frame 32 is located between the communicating member 35 and the sealing member 34. The third opening is provided with a through hole 323 penetrating in the radial direction, and a sealing member is disposed on the through hole 323 (not show).

The lubricating frame 32 passes through the sleeve 2, and the outer wall of the lubricating frame 32 is provided with a sliding portion 36. The sliding portion 36 is an outer peripheral wall of the lubricating frame 32 that is matched with the sleeve 2, and an oil passage 324 is opened on the sliding portion 32. The oil passage 324 is provided with a bore penetrating in the radial direction, and the oil passage 324 is located at a position where the outer wall of the lubrication frame 32 is located between the communicating member 35 and the seal member 33. An oil storage tank 325 is further disposed on the sliding portion 32. The oil storage tank 325 is disposed at a position that can communicate with the oil storage chamber 322 through the oil passage 324, that is, the oil passage 324 is disposed through the bottom wall of the oil storage tank 325, and the oil storage tank 325 is disposed. The opening faces the sleeve. As can be seen from the above, the oil reservoir 322 is surrounded by a seal 33, a seal 34, a seal on the through hole 323 and the lubrication frame 32 to form a substantially closed space for storing lubricating oil, and the substantially sealed oil reservoir 322 has only The outlet of the lubricating oil output port, that is, the substantially closed oil reservoir 322, does not have an external input of lubricating oil into the reservoir 322.

Therefore, when the transmission mechanism 1 is in operation, the sleeve 2 is fixed and does not rotate, and when the rod body 21 and the lubricating assembly rotate together, the lubricating oil placed in the oil storage chamber 322 enters the oil storage tank 325 through the oil passage 325 under the action of centrifugal force. The force generated by the centrifugal force is applied to the lubricating oil located in the oil storage chamber 322, so that the lubricating oil has a positive pressure toward the outside, and the lubricating oil is discharged from the oil storage tank 325 through the oil passage 324 under the action of the positive pressure, and finally stored in the oil. The lubricating oil on the oil reservoir 325 will adhere to the sliding portion 36 and the inner wall of the sleeve 2 under the action of rotation to achieve lubrication between the drive shaft and the sleeve. When the lubricating oil in the oil reservoir 322 is exhausted, the seal on the through hole 323 can be taken out, and the lubricating oil is filled through the through hole 323. After the filling is completed, the sealing member is again sealingly mounted on the through hole 323.

Transmission mechanism second embodiment:

Referring to Figure 7, Figure 7 is a structural view of the transmission mechanism 4. Applying the principle of the first embodiment of the transmission mechanism, the transmission mechanism 4 includes a transmission shaft 43 and a sleeve 41. The transmission shaft 43 is provided with a lubrication assembly including a lubrication frame 42, a seal 44, a seal 45 and a communication member 46. A ring groove is provided on the drive shaft 43, and the ring groove is a ring groove extending substantially in a circumferential direction. A sealing member 44 and a sealing member 45 are respectively disposed at both ends of the sliding groove, a communicating member 46 is disposed at a middle portion of the sliding groove, and an lubricating frame 42 is disposed in an annular shape on the sliding groove.

A through hole 423 is formed in a position where the outer wall of the lubricating frame 42 is located between the communicating member 46 and the sealing member 45, and a sealing member (not shown) is provided on the through hole 423.

The lubricating frame 42 passes through the sleeve 41. The outer wall of the lubricating frame 42 is provided with a sliding portion 426. The sliding portion 426 is an outer peripheral wall of the lubricating frame 42 that is in clearance with the sleeve 41. An oil passage 424 is opened on the sliding portion 426. The oil passage 424 is provided with a bore extending in the radial direction, and the oil passage 424 is located at a position where the outer wall of the lubrication frame 42 is located between the communicating member 46 and the seal 44.

An oil reservoir 422 is formed on the annular groove of the transmission shaft 43. The oil reservoir 422 is surrounded by a seal 44, a seal 345, a seal on the through hole 423, the drive shaft 43 and the lubrication frame 42 for storage lubrication. The substantial confined space of the oil. An oil storage tank 425 is further disposed on the sliding portion 426. The oil storage tank 425 is disposed at a position that can communicate with the oil storage chamber 422 through the oil passage 424, that is, the oil passage 424 is disposed through the bottom wall of the oil storage tank 425, and the oil storage tank 425 is disposed. The opening faces the sleeve. The substantially closed oil reservoir 422 has only an outlet as a lubricating oil output port, that is, the substantially sealed oil reservoir 422 does not have an inlet for introducing lubricating oil from the outside into the oil reservoir 422.

As can be seen from above, In the second embodiment of the transmission mechanism, a ring groove is formed in the drive shaft inward, and a lubricating frame or the like is arranged on the ring groove, that is, an oil storage chamber and an oil path are formed in the transmission shaft, and under the action of centrifugal force, the lubricating oil has The positive pressure is outward, the lubricating oil is discharged from the oil storage tank 425 through the oil passage 424 under the action of the positive pressure, and the lubricating oil finally stored on the oil storage tank 425 is attached to the sliding portion 426 and the sleeve 41 by the rotation. On the inner wall, the object of the invention is also achieved, namely to achieve lubrication between the drive shaft and the sleeve.

Third embodiment of the transmission mechanism:

On the basis of the first embodiment of the transmission mechanism, no lubrication groove can be disposed on the sliding portion of the third embodiment of the transmission mechanism, and a plurality of oil passages are disposed on the sliding portion, and a plurality of oil passages are disposed through the plurality of oil passages. a plurality of holes in the sliding portion, and uniformly distributing the plurality of oil passages on the sliding portion, so that when the transmission shaft rotates, a plurality of oil passages are used to communicate between the sliding portion and the oil storage chamber, and the lubricating oil is centrifugally It is uniformly outputted to the sliding portion through a plurality of oil passages.

Sewing machine embodiment:

Referring to Figure 8, Figure 8 is a structural view of the sewing machine. The sewing machine includes a base, an upper arm disposed on the base, and a motor 51 disposed on the upper arm, the motor 51 is configured to output a rotational driving force, and the transmission mechanism of any one of the first to third embodiments of the transmission mechanism is disposed in the upper arm. The transmission mechanism in the upper arm includes a transmission shaft 53 and a sleeve 54. The transmission shaft 53 passes through the sleeve 54 and is independently rotatable within the sleeve 54 to drive the needle 55 disposed on the end of the upper arm to reciprocate up and down.

The transmission mechanism of any one of the first to third embodiments of the transmission mechanism is disposed in the base. The transmission mechanism in the base includes a transmission shaft 56 and a sleeve 57. The transmission shaft 56 passes through the sleeve 57 and can be inside the sleeve 57. Rotating independently, the rotational driving force of the motor 51 is transmitted to the transmission shaft 56 by the deceleration shaft 52. A hook 58 is also provided on the end of the drive shaft 56, and the rotation of the hook 58 is driven by the rotation of the drive shaft 56.

Example of lubrication method for transmission mechanism:

The lubrication method embodiment is a transmission lubrication method applied to any one of the first to third embodiments of the transmission mechanism and the sewing machine embodiment. When the transmission mechanism is in operation, the sleeve is fixed and does not rotate, and the transmission shaft and the lubrication assembly rotate together The lubricating oil placed in the oil storage chamber enters the oil storage tank through the oil passage under the action of centrifugal force, and the force generated by the centrifugal force is applied to the lubricating oil located in the oil storage chamber, so that the lubricating oil has a positive pressure toward the outside. The lubricating oil is discharged through the oil passage sliding portion under the action of the positive pressure, and finally adheres to the sliding portion and the inner wall of the sleeve to achieve lubrication between the driving shaft and the sleeve. When the lubricating oil in the oil storage chamber is exhausted, the sealing member on the through hole can be taken out, and the lubricating oil is filled through the through hole. After the filling is completed, the sealing member is again sealingly mounted on the through hole.

It can be seen from the above that a substantially sealed oil storage chamber is arranged in the lubricating assembly, and the oil passage is connected between the sliding portion and the oil storage chamber through the oil passage which is only the lubricating oil outlet, and the driving shaft is driven to rotate when the driving shaft of the sewing machine rotates. The assembly rotates integrally, and the liquid lubricating oil inside the oil storage chamber is also accompanied by rotation. The rotation of the lubricating oil generates centrifugal force, so that a positive pressure in the radial direction is applied to the lubricating oil, and then the lubricating oil can be The positive pressure is output to the sliding portion through the oil passage, and is attached to the surfaces of the sleeve and the sliding portion to provide lubrication for the rotation of the transmission shaft. Since the oil pressure provided by the oil pump commonly used in the prior art is no longer used, the present invention uses the lubricating oil in the substantially closed oil storage chamber, and the positive pressure generated by the centrifugal force of the lubricating oil, when the transmission shaft runs at a high speed. At the time, more lubricating oil is needed. At this time, the centrifugal force generated by the faster rotation speed also increases, so the positive pressure applied to the lubricating oil also increases, and then more lubricating oil will be from the oil circuit. Output to the sliding portion to lubricate the rotation of the drive shaft. When the drive shaft is running at a low speed, less lubricating oil is required, and the centrifugal force generated by the slower rotation speed is also reduced, so that less lubricating oil will seep out from the oil passage, and when the transmission shaft stops rotating, Since there is no centrifugal force, and since the lubricating oil is disposed in the closed cavity, the lubricating oil will not leak out under the action of the air pressure. By automatically adjusting the oil pressure by using different rotational speeds, accurate oil supply to the sliding portion of the transmission shaft is realized, thereby avoiding excessive lubricating oil contaminating the laundry or too little lubricating oil affecting the normal use of the transmission mechanism. Since the existing complicated oil supply pipeline and oil supply system are no longer needed, it is advantageous to reduce the maintenance cost in the later stage, and the simple structure of the sewing machine and the transmission mechanism of the invention is more favorable for improving the production efficiency.

It should be emphasized that the lubrication method of the above-mentioned transmission mechanism and transmission mechanism is not only applied to the sewing machine, but also the lubrication method of the transmission mechanism and the transmission mechanism of the present invention is generally applicable to the transmission device in the mechanical field, and only the actual sealing is provided on the transmission shaft. The purpose of the present invention is achieved by the oil reservoir and the centrifugal force generated by the rotation.

Industrial applicability

The lubricating method of the transmission mechanism, the sewing machine and the transmission mechanism of the invention is suitable for the sewing machine equipment and the transmission structure, and the product of the invention is applied to realize the automatic adjustment of the oil pressure by using different rotation speeds, thereby realizing accurate oil supply to the sliding portion, thereby Avoiding too much lubricating oil contaminating clothes or too little lubricating oil affects the normal use of the sewing machine, and the transmission mechanism of the present invention and the sewing machine have a simple structure, which is more advantageous for improving production efficiency.

Claims

The transmission mechanism includes a sleeve and a transmission shaft, the transmission shaft passes through the sleeve, and the transmission shaft is rotatable relative to the sleeve;

It is characterized by:

a lubricating component is disposed on the transmission shaft, and an outer wall of the lubricating component is provided with a sliding portion that is matched with the sleeve, wherein the lubricating assembly is provided with a substantially sealed oil storage chamber, and the oil storage chamber passes through the oil The road communicates with the sliding portion.
The transmission mechanism of claim 1 wherein:

The oil passage is at least one opening formed in an outer wall of the lubrication assembly.
The transmission mechanism according to claim 2, wherein:

An oil storage tank is opened on the sliding portion, and the oil storage tank communicates with the oil storage chamber through an oil passage.
The transmission mechanism of claim 1 wherein:

The oil reservoir is provided with an opening, and the opening is provided with a seal.
A transmission mechanism according to any one of claims 1 to 4, characterized in that:

The oil reservoir is disposed offset from a central axis of the drive shaft.
a sewing machine including a motor for outputting a rotational driving force and a transmission mechanism for outputting the rotational driving force to the rotary hook, the transmission mechanism including a sleeve and a transmission shaft, the transmission shaft passing through the sleeve The drive shaft is rotatable relative to the sleeve;

It is characterized by:

a lubricating component is disposed on the transmission shaft, and an outer wall of the lubricating component is provided with a sliding portion that is matched with the sleeve, and a substantially closed oil storage chamber is disposed in the lubricating assembly, and the oil storage chamber passes through The oil passage is in communication with the sliding portion.
A sewing machine according to claim 6, wherein:

The oil passage is at least one opening formed in an outer wall of the lubrication assembly.
A sewing machine according to claim 7, wherein:

An oil storage tank is opened on the sliding portion, and the oil storage tank communicates with the oil storage chamber through an oil passage.
A sewing machine according to any one of claims 6 to 8, wherein:

The oil reservoir is disposed offset from a central axis of the drive shaft.
The lubrication method of the transmission mechanism is characterized by:

The transmission mechanism includes a relatively rotatable sleeve and a transmission shaft, the transmission shaft is provided with a lubrication assembly, and the lubrication assembly is provided with a sliding portion that is matched with the sleeve, and the lubrication assembly is provided with lubrication a substantially sealed oil storage chamber of the oil, the oil storage chamber being in communication with the sliding portion through an oil passage;

The lubrication method of the transmission mechanism includes:

The lubricating oil is output to the sliding portion through the oil passage by the centrifugal force as the drive shaft rotates.