CN112877931A - Crank type sewing machine for sewing flat seam - Google Patents
Crank type sewing machine for sewing flat seam Download PDFInfo
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- CN112877931A CN112877931A CN202110040829.4A CN202110040829A CN112877931A CN 112877931 A CN112877931 A CN 112877931A CN 202110040829 A CN202110040829 A CN 202110040829A CN 112877931 A CN112877931 A CN 112877931A
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B71/00—Lubricating or cooling devices
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Abstract
The invention relates to the technical field of sewing machines, in particular to a wrist type sewing machine for sewing a flat seam, which comprises a frame and a shaft sleeve fixed on the frame, wherein a main shaft is arranged in the shaft sleeve, one end of the main shaft is connected through a driving motor, and the other end of the main shaft is in transmission connection with a driving force transmission mechanism; through the setting of annular oil storage tank for partial lubricating oil is stored inside it, consequently can be under the circumstances that the fuel feeding stops, throws away the lubricating oil in the annular oil storage tank in the oily clearance of mistake gradually through the rotation of main shaft, makes it continue to keep the lubrication between axle sleeve and the main shaft, guarantees the subsequent lubricated effect of main shaft, provides the guarantee for having realized the long-time steady operation of main shaft.
Description
Technical Field
The invention relates to the technical field of sewing machines, in particular to a wrist type sewing machine for a flat seam.
Background
In a sewing machine (mainly an industrial sewing machine), a driving force transmission mechanism, a balance mechanism, a needle bar mechanism and a pressing mechanism are generally provided. The main shaft of the existing driving force transmission mechanism rotates along with the rotation of a motor, but the main shaft is easy to rub with an external shaft sleeve to generate abrasion powder in the rotating process and can be accompanied by noise, and the noise is accompanied by an operator for a long time and can cause certain influence on the body of the operator; meanwhile, the rotation of the main shaft generates rotation resistance to cause heating, and the main shaft is easy to extend out to cause ablation, blocking and damage of the main shaft.
The chinese patent (application No. 2011104579861) discloses a sewing machine, in which a transmission chamber is provided at the lower part of the sewing machine housing, and a feed lifting shaft drives a rotating shuttle shaft to rotate through a second transmission mechanism; the lower part of the transmission chamber is provided with an oil box, an oil storage cavity is arranged in the oil box, the oil box seals the lower end surface of the transmission chamber, the second transmission mechanism is in gear transmission, a driving gear is arranged on the feed lifting shaft, a driven gear is arranged on the rotating shuttle shaft, and the driving gear is meshed with the driven gear; an oil storage tray is arranged in the transmission chamber on the lower side of the driving gear, and when a certain amount of oil is stored in the oil storage tray, the lower portion of the driving gear is immersed in the oil. The oil liquid in the oil storage tray can be thrown out in the high-speed operation process of the driving gear, and the oil liquid is thrown out by the driving gear and splashed on each part and the inner wall of the transmission chamber, so that the atomization effect of the lubricating oil liquid in the transmission chamber is better, each part can be effectively lubricated, and the working noise is greatly reduced. However, the mode of throwing out oil cannot keep a long time of uniform and stable spraying on the main shaft, and when the oil in the oil storage tray cannot be supplemented in time, the subsequent lubricating effect of the main shaft is difficult to guarantee, and the long-time stable operation cannot be kept, so that the actual lubricating requirement cannot be met.
Therefore, the crank type sewing machine for the flat seam is designed, partial lubricating oil is stored in the annular oil storage tank through the annular oil storage tank, so that the lubricating oil in the annular oil storage tank can be gradually thrown out into the oil passing gap through the rotation of the main shaft under the condition that oil supply is stopped, the lubricating oil between the shaft sleeve and the main shaft is continuously kept, the subsequent lubricating effect of the main shaft is ensured, and the long-time stable operation of the main shaft is guaranteed.
Disclosure of Invention
The invention provides a wrist type sewing machine for sewing a flat seam, which aims to make up for the defects of the prior art and solve the problems that the subsequent lubricating effect is difficult to ensure when oil in an oil storage tray is not supplemented in time, and the long-time stable operation cannot be kept, so that the actual lubricating requirement cannot be met.
The technical scheme adopted by the invention for solving the technical problems is as follows: a crank type sewing machine for sewing a flat seam comprises a frame and a shaft sleeve fixed on the frame, wherein a main shaft is arranged in the shaft sleeve, one end of the main shaft is connected through a driving motor, and the other end of the main shaft is in transmission connection with a driving force transmission mechanism;
the gap between the outer wall of the main shaft and the inner wall of the shaft sleeve forms an oil passing gap, a plurality of annular oil storage grooves which are arranged at intervals along the axial direction are arranged at the corresponding positions of the periphery of the main shaft at two sides of the shaft sleeve, the main shaft between the adjacent annular oil storage grooves forms an annular lubricating part, and the annular oil storage grooves are communicated with the oil passing gap; an annular oil storage cavity is formed in one side, close to the driving motor, of the shaft sleeve, an oil injection nozzle communicated with the oil storage cavity is arranged on the outer wall of the shaft sleeve, and the oil injection nozzle is communicated with an external oil supply system through a pipeline; and a communicating channel for communicating is arranged between the oil storage cavity and the oil passing gap close to one side of the driving motor.
When the lubricating oil filling device is used, lubricating oil can be injected into the oil storage cavity through the external oil supply system through the arrangement of the oil storage cavity and the oil injection nozzle, and then the lubricating oil is extruded into the oil passing gap through the communication channel, so that an oil film can be formed in the oil passing gap, a good lubricating effect is achieved, the abrasion and the heating of a main shaft are reduced, and the generation of noise is reduced, so that the harm of long-time noise accompanying operators to the bodies of the main shaft is avoided; meanwhile, due to the arrangement of the annular oil storage groove, part of lubricating oil is stored in the annular oil storage groove, so that the lubricating oil in the annular oil storage groove can be gradually thrown out to the oil passing gap through the rotation of the main shaft under the condition that oil supply is stopped, the lubricating oil between the shaft sleeve and the main shaft can be continuously kept, the subsequent lubricating effect of the main shaft is ensured, and the long-time stable operation of the main shaft is guaranteed.
Preferably, a plurality of spiral communication grooves communicated with adjacent annular oil storage grooves are formed in the outer side surface of the annular lubricating portion, and the spiral communication grooves are identical in rotation direction. Because enough lubricating oil can be obtained in the oil passing gap of the annular oil storage groove under the condition that oil supply is stopped, and the oil supply is possibly insufficient in the oil passing gap of the annular lubricating part, the problems of abrasion, heating and noise caused by insufficient lubrication are caused, and through the arrangement of the spiral communication groove, on one hand, the lubricating oil in the spiral communication groove is thrown out of the periphery to the oil passing gap corresponding to the annular lubricating part through the rotation of the main shaft, and the sufficient lubrication of the annular lubricating part is ensured; on the other hand, the spiral communicating groove can force the lubricating oil to move along the axial direction, so that a better lubricating effect is ensured in the whole oil passing gap; in addition, because the spiral direction of the spiral communication grooves is the same, the lubricating oil can move in a one-way mode in the oil passing gap, the problem that the lubricating oil is insufficient in the oil passing gap due to leakage of the lubricating oil towards one side of the driving motor is solved, and stable lubrication can be guaranteed.
Preferably, a chute communicated with the spiral communication groove is arranged on the outer side surface of the annular lubricating part, and the rotation direction of the chute is opposite to that of the spiral communication groove. Through the setting of chute, on the one hand, increased the volume of storing lubricating oil, and then the steady operation time under the extension no oil feed condition, on the other hand, because the rotation of chute is opposite with the rotation of spiral communicating groove, consequently its inside lubricating oil is difficult to get into the spiral communicating groove along with the rotation of main shaft and discharges away, consequently can ensure the long-time lubricated effect of the annular lubrication portion that corresponds.
Preferably, a sealing groove is formed in the middle of the inner side of the shaft sleeve, an installation groove matched with the sealing groove is correspondingly formed in the outer side of the spindle, and the installation groove and the sealing groove jointly form a sealing cavity for installing a first sealing ring; first sealing washer suit outside the mounting groove, the lateral surface of first sealing washer and the medial surface sealing fit of seal groove, first sealing washer is provided with first toper lip limit towards mounting groove one side, first toper lip border is kept away from the driving motor direction and is close to mounting groove one side gradually and laminates with the mounting groove medial surface. Through the setting of first sealing washer, on the one hand, can utilize the mode of first toper lip limit and the laminating of mounting groove medial surface for form the air film when lubricating oil passes through this department, reach lubricated and sealed effect, on the other hand, thereby also can make the clearance minimize reduce the leakage quantity of lubricating oil, prolong its time in the axle sleeve, realized long-time lubricated purpose.
Preferably, a second sealing ring is arranged in the mounting groove at one side of the first sealing ring, which is far away from the driving motor, the second sealing ring is in sealing fit with the sealing groove, and a spring is arranged between the second sealing ring and the first sealing ring; and a second tapered lip edge is arranged on the outer side of the second sealing ring and is pressed against the inner side surface of the first tapered lip edge. Because the main shaft rotational speed is too big, and when making the volume of the lubricating oil in the seal chamber too big, the pressure increase in the seal chamber towards driving motor one side and then make the clearance between first toper lip and the seal groove increase, cause the leakage rate of lubricating oil to increase, consequently, through the setting of second sealing washer and spring, can promote first sealing washer to slide to the second sealing washer by a small margin when the pressure increase in the seal chamber towards driving motor one side, and then make first toper lip have increased the extrusion force to seal groove one side under the extrusion of second toper lip, and then make the power on two surfaces of first toper lip increase with decreasing, ensure the stability of oil film, and reduce and leak.
Preferably, a first damping assembly is sleeved in the sealing groove of the first sealing ring on one side facing the driving motor, a second damping assembly matched with the first damping assembly is arranged in the mounting groove, a plurality of annular fins arranged at intervals are arranged on one opposite sides of the first damping assembly and the second damping assembly, and the annular fins of the first damping assembly and the annular fins of the second damping assembly are arranged in a staggered manner and form an S-shaped channel for lubricating oil to pass through. Through first damper and second damper' S setting, can make the oil film that lubricating oil formed in the S-shaped passageway, and then when the main shaft is vertical to or when the level has a small amplitude of vibration, the oil film in the S-shaped passageway receives the extrusion, and then improves reverse hysteresis power, and then reaches buffering absorbing purpose for main shaft steady operation also avoids the main shaft incline to cause the problem of wearing and tearing increase simultaneously.
The invention has the following beneficial effects:
1. according to the crank type sewing machine for the flat seam, the annular oil storage groove is arranged, so that part of lubricating oil is stored in the annular oil storage groove, the lubricating oil in the annular oil storage groove can be gradually thrown out to the oil passing gap through the rotation of the main shaft under the condition that oil supply is stopped, the lubricating between the shaft sleeve and the main shaft is continuously kept, the subsequent lubricating effect of the main shaft is ensured, and the long-time stable operation of the main shaft is guaranteed.
2. According to the wrist type sewing machine for sewing the flush joint with the crank, due to the arrangement of the first sealing ring, on one hand, an air film is formed when lubricating oil passes through the position by utilizing the mode that the first tapered lip edge is attached to the inner side surface of the mounting groove, so that the lubricating and sealing effects are achieved, on the other hand, the gap can be reduced as much as possible, so that the leakage amount of the lubricating oil is reduced, the time of the lubricating oil in the shaft sleeve is prolonged, and the purpose of long-time lubrication is achieved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective assembly view of a drive spindle and spindle sleeve according to the present invention;
FIG. 2 is a cross-sectional view of the drive spindle and spindle sleeve of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a perspective view of the drive spindle of the present invention.
In the figure:
1. a main shaft; 11. an annular oil storage tank; 12. an annular lubricating portion; 13. a spiral communication groove; 14. a chute; 15. mounting grooves; 16. an oil passing gap; 2. a shaft sleeve; 21. an oil storage chamber; 22. an oil injection nozzle; 23. a communication channel; 24. a sealing groove; 3. sealing the cavity; 31. a first dampening member; 32. a second dampening member; 33. a first seal ring; 34. a first tapered lip; 35. a second seal ring; 36. a second tapered lip; 37. a spring.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 4, a wrist-type sewing machine for sewing a flat seam includes a frame and a shaft sleeve 2 fixed on the frame, a main shaft 1 is arranged in the shaft sleeve 2, one end of the main shaft 1 is connected with a driving motor, and the other end of the main shaft 1 is in transmission connection with a driving force transmission mechanism;
a gap between the outer wall of the main shaft 1 and the inner wall of the shaft sleeve 2 forms an oil passing gap 16, a plurality of annular oil storage grooves 11 which are arranged at intervals along the axial direction are arranged at the corresponding positions of the outer periphery of the main shaft 1 at two sides of the shaft sleeve 2, the main shaft 1 between the adjacent annular oil storage grooves 11 forms an annular lubricating part 12, and the annular oil storage grooves 11 are communicated with the oil passing gap 16; an annular oil storage cavity 21 is formed in one side, close to the driving motor, of the shaft sleeve 2, an oil injection nozzle 22 communicated with the oil storage cavity 21 is arranged on the outer wall of the shaft sleeve 2, and the oil injection nozzle 22 is communicated with an external oil supply system through a pipeline; a communication channel 23 for communication is arranged between the oil storage chamber 21 and the oil passing gap 16 close to one side of the driving motor.
When the lubricating device is used, through the arrangement of the oil storage cavity 21 and the oil injection nozzle 22, lubricating oil can be injected into the oil storage cavity 21 through an external oil supply system, and then the lubricating oil is extruded into the oil passing gap 16 through the communicating channel 23, so that an oil film can be formed in the oil passing gap 16, a good lubricating effect is achieved, the abrasion and the heating of the main shaft 1 are reduced, and meanwhile, the generation of noise is reduced, so that the long-time noise accompanying operators are prevented from harming the bodies of the main shaft; meanwhile, due to the arrangement of the annular oil storage groove 11, part of lubricating oil is stored in the annular oil storage groove, so that the lubricating oil in the annular oil storage groove 11 can be gradually thrown out into the oil passing gap 16 through the rotation of the main shaft 1 under the condition that oil supply is stopped, the lubricating oil can continuously keep the lubrication between the shaft sleeve 2 and the main shaft 1, the subsequent lubricating effect of the main shaft 1 is ensured, and the long-time stable operation of the main shaft 1 is guaranteed.
In one embodiment of the present invention, a plurality of spiral communication grooves 13 communicating with adjacent annular oil reservoirs 11 are provided on the outer surface of the annular lubrication portion 12, and the spiral communication grooves 13 have the same rotational direction. When the oil supply is stopped, the oil passing gap 16 at the annular oil storage groove 11 can obtain enough lubricating oil, and the oil passing gap 16 of the annular lubricating part 12 can be lack of oil supply, so that the problems of abrasion, heat generation and noise caused by insufficient lubrication are caused, and on one hand, the lubricating oil in the spiral communication groove 13 is thrown out of the periphery to the oil passing gap 16 corresponding to the annular lubricating part 12 through the rotation of the main shaft 1 through the arrangement of the spiral communication groove 13, so that the sufficient lubrication at the annular lubricating part 12 is ensured; on the other hand, the spiral communication groove 13 can force the lubricating oil to move along the axial direction, so that a good lubricating effect is ensured in the whole oil passing gap 16; in addition, because the spiral communication grooves 13 have the same rotation direction, the lubricating oil can move in the oil passing gap 16 in a single direction, the problem that the lubricating oil leaks towards one side of the driving motor to cause insufficient lubricating oil in the oil passing gap 16 is solved, and stable lubrication is ensured.
In one embodiment of the present invention, a diagonal groove 14 communicating with the spiral communication groove 13 is provided on an outer surface of the annular lubrication portion 12, and a rotational direction of the diagonal groove 14 is opposite to a rotational direction of the spiral communication groove 13. By the arrangement of the inclined groove 14, on one hand, the amount of stored lubricating oil is increased, and further, the stable operation time under the condition of no oil supply is prolonged, and on the other hand, because the rotating direction of the inclined groove 14 is opposite to that of the spiral communication groove 13, the lubricating oil in the inclined groove is not easy to enter the spiral communication groove 13 along with the rotation of the main shaft 1 and is discharged, so that the long-time lubricating effect of the corresponding annular lubricating part 12 can be ensured.
As an embodiment of the invention, a sealing groove 24 is arranged in the middle of the inner side of the shaft sleeve 2, an installation groove 15 matched with the sealing groove 24 is correspondingly arranged on the outer side of the main shaft 1, and the installation groove 15 and the sealing groove 24 together form a sealing cavity 3 for installing a first sealing ring 33; first sealing washer 33 suit is outside mounting groove 15, the sealed cooperation of the lateral surface of first sealing washer 33 and the medial surface of seal groove 24, first sealing washer 33 is provided with first toper lip 34 towards mounting groove 15 one side, first toper lip 34 is close to mounting groove 15 one side and is laminated with mounting groove 15 medial surface along keeping away from the driving motor direction gradually. Through the setting of first sealing washer 33, on the one hand, can utilize the mode of first toper lip 34 with the laminating of mounting groove 15 medial surface for form the air film when lubricating oil passes through this department, reach lubricated and sealed effect, on the other hand, thereby also can make the clearance minimize and reduce the leakage quantity of lubricating oil, prolong its time in axle sleeve 2, realized long-time lubricated purpose.
In an embodiment of the present invention, a second seal ring 35 is disposed in the mounting groove 15 on a side of the first seal ring 33 away from the driving motor, the second seal ring 35 is in sealing engagement with the seal groove 24, and a spring 37 is disposed between the second seal ring 35 and the first seal ring 33; a second tapered lip 36 is arranged on the outer side of the second sealing ring 35, and the second tapered lip 36 is pressed against the inner side surface of the first tapered lip 34. Because the rotation speed of the spindle 1 is too high, when the amount of the lubricating oil in the sealing cavity 3 is too large, the pressure in the sealing cavity 3 towards one side of the driving motor is increased, so that the gap between the first tapered lip 34 and the sealing groove 24 is increased, and the leakage amount of the lubricating oil is increased, therefore, through the arrangement of the second sealing ring 35 and the spring 37, the first sealing ring 33 can be pushed to slide to the second sealing ring 35 in a small way when the pressure in the sealing cavity 3 towards one side of the driving motor is increased, so that the extrusion force towards one side of the sealing groove 24 is increased by the first tapered lip 34 under the extrusion of the second tapered lip 36, the forces on the two surfaces of the first tapered lip 34 are increased and decreased simultaneously, the stability of an oil film is ensured, and the leakage is reduced.
In an embodiment of the present invention, a first damper assembly 31 is installed in the sealing groove 24 of the first sealing ring 33 facing the driving motor, a second damper assembly 32 matched with the first damper assembly 31 is installed in the installation groove 15, a plurality of annular fins are arranged at intervals on opposite sides of the first damper assembly 31 and the second damper assembly 32, and the annular fins of the first damper assembly 31 and the annular fins of the second damper assembly are arranged in a staggered manner to form an S-shaped channel for lubricating oil to pass through. Through the setting of first damper 31 and second damper 32, can make the oil film that lubricating oil formed in the S-shaped passageway, and then when main shaft 1 is vertical to or when the level has a small amplitude vibration to, the oil film in the S-shaped passageway receives the extrusion, and then improves reverse hysteresis power, and then reaches the purpose of buffering shock attenuation for main shaft 1 steady operation also avoids main shaft 1 skew to cause the problem of wearing and tearing increase simultaneously.
Through the arrangement of the oil storage cavity 21 and the oil injection nozzle 22, lubricating oil can be injected into the oil storage cavity 21 through an external oil supply system, and then the lubricating oil is extruded into the oil passing gap 16 through the communicating channel 23, so that an oil film can be formed in the oil passing gap 16, a good lubricating effect is achieved, the abrasion and the heating of the main shaft 1 are reduced, and the generation of noise is reduced, so that the harm of long-time noise accompanying operators to the bodies of the operators is avoided; meanwhile, due to the arrangement of the annular oil storage groove 11, part of lubricating oil is stored in the annular oil storage groove, so that the lubricating oil in the annular oil storage groove 11 can be gradually thrown out into the oil passing gap 16 through the rotation of the main shaft 1 under the condition that oil supply is stopped, the lubricating oil can continuously keep the lubrication between the shaft sleeve 2 and the main shaft 1, the subsequent lubricating effect of the main shaft 1 is ensured, and the long-time stable operation of the main shaft 1 is guaranteed; when the oil supply is stopped, the oil passing gap 16 at the annular oil storage groove 11 can obtain enough lubricating oil, and the oil passing gap 16 of the annular lubricating part 12 can be lack of oil supply, so that the problems of abrasion, heat generation and noise caused by insufficient lubrication are caused, and on one hand, the lubricating oil in the spiral communication groove 13 is thrown out of the periphery to the oil passing gap 16 corresponding to the annular lubricating part 12 through the rotation of the main shaft 1 through the arrangement of the spiral communication groove 13, so that the sufficient lubrication at the annular lubricating part 12 is ensured; on the other hand, the spiral communication groove 13 can force the lubricating oil to move along the axial direction, so that a good lubricating effect is ensured in the whole oil passing gap 16; in addition, because the spiral communication grooves 13 have the same rotating direction, the lubricating oil can move in the oil passing gap 16 in a single direction, so that the problem of insufficient lubricating oil in the oil passing gap 16 caused by the leakage of the lubricating oil towards one side of the driving motor is avoided, and stable lubrication is ensured; through the arrangement of the inclined groove 14, on one hand, the amount of stored lubricating oil is increased, and further, the stable operation time under the condition of no oil supply is prolonged, on the other hand, because the rotating direction of the inclined groove 14 is opposite to that of the spiral communication groove 13, the lubricating oil in the inclined groove is not easy to enter the spiral communication groove 13 along with the rotation of the main shaft 1 and is not easy to discharge, and therefore, the long-time lubricating effect of the corresponding annular lubricating part 12 can be ensured; through the arrangement of the first sealing ring 33, on one hand, an air film is formed when lubricating oil passes through the position by utilizing the mode that the first tapered lip 34 is attached to the inner side surface of the mounting groove 15, so that the lubricating and sealing effects are achieved, on the other hand, the gap can be reduced as much as possible, so that the leakage amount of the lubricating oil is reduced, the time of the lubricating oil in the shaft sleeve 2 is prolonged, and the purpose of long-time lubrication is achieved; when the rotation speed of the spindle 1 is too high and the amount of the lubricating oil in the sealing cavity 3 is too large, the pressure in the sealing cavity 3 towards one side of the driving motor is increased, so that the gap between the first tapered lip 34 and the sealing groove 24 is increased, and the leakage amount of the lubricating oil is increased, therefore, through the arrangement of the second sealing ring 35 and the spring 37, the first sealing ring 33 can be pushed to slide to the second sealing ring 35 in a small way when the pressure in the sealing cavity 3 towards one side of the driving motor is increased, so that the extrusion force of the first tapered lip 34 towards one side of the sealing groove 24 is increased under the extrusion of the second tapered lip 36, the forces on the two surfaces of the first tapered lip 34 are increased and decreased at the same time, the stability of an oil film is ensured, and the leakage is reduced; through the setting of first damper 31 and second damper 32, can make the oil film that lubricating oil formed in the S-shaped passageway, and then when main shaft 1 is vertical to or when the level has a small amplitude vibration to, the oil film in the S-shaped passageway receives the extrusion, and then improves reverse hysteresis power, and then reaches the purpose of buffering shock attenuation for main shaft 1 steady operation also avoids main shaft 1 skew to cause the problem of wearing and tearing increase simultaneously.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The crank type flat seam sewing machine is characterized by comprising a rack and a shaft sleeve (2) fixed on the rack, wherein a main shaft (1) is arranged in the shaft sleeve (2), one end of the main shaft (1) is connected through a driving motor, and the other end of the main shaft (1) is in transmission connection with a driving force transmission mechanism;
a gap between the outer wall of the main shaft (1) and the inner wall of the shaft sleeve (2) forms an oil passing gap (16), a plurality of annular oil storage grooves (11) which are arranged at intervals along the axial direction are formed in the corresponding positions of the outer periphery of the main shaft (1) on the two sides of the shaft sleeve (2), the main shaft (1) between the adjacent annular oil storage grooves (11) forms an annular lubricating part (12), and the annular oil storage grooves (11) are communicated with the oil passing gap (16); an annular oil storage cavity (21) is formed in one side, close to the driving motor, of the shaft sleeve (2), an oil injection nozzle (22) communicated with the oil storage cavity (21) is arranged on the outer wall of the shaft sleeve (2), and the oil injection nozzle (22) is communicated with an external oil supply system through a pipeline; and a communication channel (23) for communication is arranged between the oil storage cavity (21) and the oil passing gap (16) close to one side of the driving motor.
2. A crank type sewing machine for lockstitch according to claim 1, wherein a plurality of spiral communication grooves (13) communicating with adjacent annular oil storage grooves (11) are provided on the outer side surface of the annular lubricating portion (12), and the spiral communication grooves (13) have the same rotation direction.
3. A crank type sewing machine for lockstitch according to claim 2, wherein a chute (14) communicating with the spiral communicating groove (13) is provided on the outer side surface of the annular lubricating portion (12), and the direction of rotation of the chute (14) is opposite to the direction of rotation of the spiral communicating groove (13).
4. A crank type lockstitch sewing machine according to claim 3, characterized in that a sealing groove (24) is provided in the middle of the inner side of the shaft sleeve (2), an installation groove (15) matching with the sealing groove (24) is correspondingly provided on the outer side of the main shaft (1), and the installation groove (15) and the sealing groove (24) together form a sealing cavity (3) for installing a first sealing ring; first sealing washer suit is outside mounting groove (15), the medial surface sealing fit of the lateral surface of first sealing washer and seal groove (24), first sealing washer is provided with first toper lip limit (34) towards mounting groove (15) one side, first toper lip limit (34) are close to mounting groove (15) one side and are laminated with mounting groove (15) medial surface along keeping away from the driving motor direction gradually.
5. A crank type sewing machine for lockstitch according to claim 4, characterized in that a second sealing ring (35) is arranged in the mounting groove (15) on the side of the first sealing ring (33) far away from the driving motor, the second sealing ring (35) is in sealing fit with the sealing groove (24), and a spring (37) is arranged between the second sealing ring (35) and the first sealing ring (33); and a second tapered lip (36) is arranged on the outer side of the second sealing ring (35), and the second tapered lip (36) is pressed against the inner side surface of the first tapered lip (34).
6. A crank type sewing machine for lockstitch according to claim 5, characterized in that a first damping component (31) is sleeved in the sealing groove (24) of the first sealing ring (33) facing to the driving motor, a second damping component (32) matched with the first damping component (31) is arranged in the mounting groove (15), a plurality of annular fins arranged at intervals are arranged on the opposite sides of the first damping component (31) and the second damping component (32), and the annular fins of the first damping component (31) and the annular fins of the second damping component are arranged in a staggered manner and form an S-shaped channel for lubricating oil to pass through.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110040829.4A CN112877931B (en) | 2021-01-13 | 2021-01-13 | Crank type sewing machine for sewing flat seam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110040829.4A CN112877931B (en) | 2021-01-13 | 2021-01-13 | Crank type sewing machine for sewing flat seam |
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| CN112877931A true CN112877931A (en) | 2021-06-01 |
| CN112877931B CN112877931B (en) | 2022-09-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117847170A (en) * | 2024-03-07 | 2024-04-09 | 浙江安吉华意科技有限公司 | Crankshaft connecting rod mechanism and crankcase |
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| US20200271227A1 (en) * | 2018-09-01 | 2020-08-27 | Vr Automotive Dichtungssysteme Gmbh | Radial shaft seal |
| US20200292079A1 (en) * | 2017-12-27 | 2020-09-17 | Nok Corporation | Sealing apparatus |
| CN111692211A (en) * | 2020-06-22 | 2020-09-22 | 奚志娴 | Magnetic suspension bearing with squeeze film damper |
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2021
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| US20200271227A1 (en) * | 2018-09-01 | 2020-08-27 | Vr Automotive Dichtungssysteme Gmbh | Radial shaft seal |
| CN109630075A (en) * | 2019-02-26 | 2019-04-16 | 西南石油大学 | A kind of oil/gas well slug flow combined gas slug crushing device and method |
| CN111692211A (en) * | 2020-06-22 | 2020-09-22 | 奚志娴 | Magnetic suspension bearing with squeeze film damper |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117847170A (en) * | 2024-03-07 | 2024-04-09 | 浙江安吉华意科技有限公司 | Crankshaft connecting rod mechanism and crankcase |
| CN117847170B (en) * | 2024-03-07 | 2024-05-14 | 浙江安吉华意科技有限公司 | Crankshaft connecting rod mechanism and crankcase |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112877931B (en) | 2022-09-13 |
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