CN113846437A - Pattern machine - Google Patents

Abstract

The invention relates to a pattern sewing machine, in the pattern sewing machine, a sewing machine head is arranged on a workbench, the front end of the sewing machine head is positioned above a processing station, a main shaft is arranged in the sewing machine head and extends in the same direction as the sewing machine head, an auxiliary shaft is arranged in an installation cavity and extends in the same direction as the main shaft, the front end of the auxiliary shaft is provided with a shuttle hook, the auxiliary shaft is in motion connection with the main shaft through a transfer case and a crank of a linkage structure, thereby driving the shuttle hook to synchronously swing relative to the needle head under the rotation action of the main shaft around the axis of the main shaft so as to realize the function of thread take-up, on the basis, the main shaft and the auxiliary shaft extend in the same direction, so that each transmission part of the linkage structure is clear and distinct, the maintenance is very facilitated, when the thread take-up mode needs to be changed from the shuttle to the rotating shuttle, only the crank needs to be detached, the gear with the corresponding gear ratio is installed on the transfer case, and efficient replacement can be achieved without any complex disassembly and assembly.

Description

Pattern machine

Technical Field

The invention relates to the field of sewing equipment, in particular to a pattern sewing machine.

Background

In order to meet the thread picking requirements of pattern machines during sewing, most of the pattern machines are provided with corresponding rotating shuttle or shuttle swinging mechanisms, a servo motor is usually adopted as a power source, the servo motor is controlled to rotate positively and negatively within a set rotation angle range, and power is transmitted to the shuttle swinging through a series of complex transmission, so that the reciprocating swinging of the shuttle swinging is directly realized.

For example, the chinese utility model with patent No. CN201220126340.5 discloses a crank link type shuttle driving mechanism for embroidery machine, which comprises a base, a shuttle member and a driving device, wherein the base is a square box separated into an inner box and an outer box by a rib plate, wherein the inner box extends a pair of connecting arms, the shuttle member is arranged under the connecting arms, a rotating shaft passes through the inner box and the rib plate and extends into the outer box, the driving device comprises a transmission pinion arranged on the extending shaft end of the rotating shaft and a transmission shaft perpendicular to and avoiding the rotating shaft, the end of the transmission shaft extends out of the inner box and is driven by external power, a driving bevel gear on the transmission shaft, a link driving device and a sector swinging gear arranged on the rib plate, the link driving device comprises a driven bevel gear, an output shaft, a crank and a link connected with the driven bevel gear, the link driving sector swinging gear reciprocates within a set rotation angle range, engaging it with the drive pinion drives the shuttle member.

In the mechanism, the transmission structure is complex, a plurality of transmission parts are needed to realize power transmission because the power source for the swing of the shuttle hook comes from the main shaft, and the axes of rotating elements such as pinions, sector gears and the like are intersected, which means that the transmission direction of power among elements is changed for a plurality of times, thereby greatly improving the energy loss, and because the transmission direction is changed, the contact among the parts is increased, the service life is influenced, and the maintenance is not facilitated.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a pattern sewing machine with the shuttle and the main shaft having the same power source and simple and stable structure aiming at the current situation of the prior art.

The second technical problem to be solved by the invention is to provide a pattern sewing machine for effectively adjusting the gap between the sector swinging gear and the tooth part of the connector, aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a pattern machine, comprising:

the device comprises a rack and a clamping device, wherein the rack is provided with a workbench, the front side of the workbench is provided with a processing station, and the interior of the workbench is hollow to form an installation cavity;

the sewing machine head is arranged on the workbench, the front end of the sewing machine head is positioned above the processing station, the front end of the sewing machine head is provided with a needle head extending downwards, and a driver is also arranged in the sewing machine head;

the main shaft is arranged in the sewing machine head and extends in the same direction as the sewing machine head, one end of the main shaft is connected to the driver, and the other end of the main shaft is connected with the needle head so as to rotate around the axis of the main shaft under the driving of the driver to drive the needle head to move up and down relative to the processing position;

the auxiliary shaft is arranged in the mounting cavity and extends in the same direction as the main shaft, and the front end of the auxiliary shaft is provided with a shuttle hook; and

the linkage structure comprises a transfer case and a crank, wherein the power input end of the transfer case is connected with the main shaft, and the crank is connected to the transfer case and can intermittently act on the auxiliary shaft under the rotation action of the main shaft, so that the auxiliary shaft drives the shuttle to synchronously swing to and fro relative to the needle head.

Preferably, the transfer case is arranged adjacent to the secondary shaft and comprises a first split shaft and a second split shaft which are arranged side by side and both extend in the same direction as the primary shaft and the secondary shaft, wherein the first split shaft is linked with the primary shaft, the second split shaft is arranged adjacent to the secondary shaft, the first end of the crank is rotatably connected to the first split shaft and is eccentrically arranged, and the second end of the crank is in driving connection with the secondary shaft. The power of the main shaft is efficiently transmitted to the auxiliary shaft through the first split shaft and the second split shaft of the transfer case, and the crank with the first end rotatably connected to the first split shaft can transmit the self rotating force to the auxiliary shaft by means of the support of the second split shaft, so that the auxiliary shaft drives the shuttle to synchronously swing to and fro relative to the main shaft, and further the thread take-up function is realized; in addition, each sub-shaft, the main shaft and the auxiliary shaft extend in the same direction, so that each transmission part of the thread take-up mechanism is clear and distinct, the maintenance is very facilitated, when the thread take-up mode needs to be changed from a shuttle hook to a rotating shuttle, only the crank needs to be disassembled, and the gears with corresponding gear ratios are installed on the first sub-shaft and the second sub-shaft, so that the efficient replacement can be realized without any complicated disassembly and assembly.

The sector-shaped swinging gear can realize power transmission at different positions, and preferably, the transfer case is arranged below the auxiliary shaft, the crank extends upwards at the top of the second end of the crank to form a sector-shaped swinging gear, the sector-shaped swinging gear acts on the auxiliary shaft and can drive the auxiliary shaft to swing, and the auxiliary shaft is provided with a tooth part meshed with the sector-shaped swinging gear at a corresponding position. Like this fan-shaped changes the design form of pendulum gear for this fan-shaped changes the arc tooth portion of pendulum gear upwards extend all the time and swing at certain extent, avoided the side direction to extend or the condition that extends down, consequently no matter how the power supply sets up, whole fan-shaped changes the focus of pendulum gear and maintains on the countershaft all the time, can not squint by a wide margin, has avoided above-mentioned other circumstances to cause the atress uneven and lead to the local wear of gear excessive, has ensured life.

In order to ensure that the sector-shaped rotating and swinging gear and the driving auxiliary shaft swing, preferably, a connector is arranged on the auxiliary shaft, the tooth part is arranged on the outer wall of the connector, and a rib for limiting the sector-shaped rotating and swinging gear to be separated from the connector is further arranged on the connector.

In order to ensure that the power of the main shaft can be transmitted to the first transmission shaft, the first transmission shaft is provided with a first transmission wheel, the main shaft is provided with a second transmission wheel, and the first transmission shaft is linked through transmission belts sequentially wound on the first transmission wheel and the second transmission wheel.

Each part works under the environment of oil pressure, preferably, the linkage structure further comprises a transfer case, the transfer case is arranged at the rear side of the workbench, the interior of the transfer case is hollow, an oil pressure cavity is formed, the first transfer shaft and the second transfer shaft are arranged in the oil pressure cavity, and the rear end of the auxiliary shaft extends into the oil pressure cavity.

In order to ensure that the swinging of the sector swinging gear is not influenced by the outside, preferably, a partition plate is arranged in the transfer case to partition the oil pressure cavity into a first cavity and a second cavity, the first driving wheel is arranged in the first cavity, and the crank and the sector swinging gear are both arranged in the second cavity.

In order to further solve the second technical problem, the invention adopts the following technical scheme: the linkage structure further comprises a gap eliminating structure used for adjusting a gap between the fan-shaped rotating and swinging gear and the connector tooth part, the gap eliminating structure comprises an eccentric shaft sleeve and a gap eliminating hole formed in the partition plate, and the eccentric shaft sleeve is sleeved on the periphery of the second split shaft and is embedded in the gap eliminating hole. Because the eccentric shaft sleeve is provided with the inner ring and the outer ring, the outer ring is fixed with the anti-backlash hole, and the inner wall of the outer ring is of an eccentric structure, the inner ring connected to the second split shaft can track on the inner wall of the outer ring. Just because the clearance in inner circle and outer lane circumference can the movable adjustment, when fan-shaped pendulum gear and tooth cooperation are too tight or too loose, the second split axis just can drive fan-shaped pendulum gear synchronous motion along with the removal of inner circle, and then provide certain removal allowance and compensate or adjust the fit clearance between fan-shaped pendulum gear and the tooth for be in a subtle dynamic balance all the time between the tooth of fan-shaped pendulum gear and connector, borrow this to satisfy the demand of eliminating the clearance and transferring the clearance, not only greatly reduced the harsh standard to assembly process, noise when can also effectively reducing the machine operation.

Preferably, oil seals extend outwards along the radial direction at both ends of the eccentric shaft sleeve in the length direction, and a gap is reserved between at least one oil seal and the corresponding side wall of the partition plate. Because the teeth on the sector swinging gear are usually obliquely arranged, once the sector swinging gear and the connecting head tooth part have a tooth position difference, an axial force can be generated, and therefore, due to the design of the gap between the oil seal and the partition plate, the axial force generated when the sector swinging gear and the connecting head tooth part are meshed and matched can be reversely acted on the sector swinging gear through the rotation of the auxiliary shaft and finally counteracted by the displacement of the eccentric shaft sleeve.

As an improvement, the front side of the workbench is provided with an operation table plate, the processing station is formed on the operation table plate, and the operation table plate is provided with a needle hole for the needle to extend into.

Compared with the prior art, the invention has the advantages that: in the pattern sewing machine, the auxiliary shaft is in motion correlation with the main shaft through the transfer case and the crank of the linkage structure, and then the main shaft drives the shuttle hook to synchronously swing relative to the needle head under the rotation action of the main shaft around the axis of the main shaft, so as to realize the function of picking, on the basis, the main shaft and the auxiliary shaft extend in the same direction, so that each transmission part of the linkage structure is clear and distinct, the maintenance is very favorable, when the picking mode is required to be changed from the shuttle hook to the rotating shuttle, only the crank needs to be detached, the gear with the corresponding gear ratio is installed on the transfer case, and the efficient replacement can be realized without any complex disassembly and assembly.

Drawings

FIG. 1 is a schematic overall structure diagram of a pattern sewing machine in an embodiment of the invention;

FIG. 2 is a schematic view of the entire apparatus of FIG. 1 with the work bench omitted;

FIG. 3 is a schematic view of FIG. 1 with a portion of the structure omitted;

FIG. 4 is an overall schematic view of the linkage structure;

FIG. 5 is a schematic view from another angle of FIG. 4;

FIG. 6 is an overall schematic view of the bottom of the transfer case (with the seal cover omitted).

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 6, a preferred embodiment of the present invention. In the present embodiment, the pattern sewing machine includes a frame 1, a sewing head 2, a main shaft 31, a sub shaft 33, and a linkage structure. The above-mentioned frame 1 has a table 11, and the inside of the table 11 is hollow to form a mounting chamber 1 b. An operation table 111 is provided on the front side of the table 11, and a processing station 1a is formed on the operation table 111. The sewing machine head 2 is provided on the table 11, the front end of the sewing machine head 2 is located above the processing position 1a, the front end of the sewing machine head 2 is provided with a needle 21 extending downward, the operation table 111 is provided with a needle hole 112 into which the needle 21 extends, and the sewing machine head 2 is further provided with a driver 32.

The main shaft 31 in this embodiment is disposed in the sewing machine head 2 and extends in the same direction as the sewing machine head 2, one end of the main shaft 31 is connected to the driver 32, the other end of the main shaft 31 is connected to the needle 21, and further the needle 21 is driven by the driver 32 to move up and down relative to the processing station 1a, the auxiliary shaft 33 is disposed in the installation cavity 1b and extends in the same direction as the main shaft 31, the front end of the auxiliary shaft 33 is provided with a swing shuttle 38, the power input end of the linkage structure is connected to the main shaft 31, and the power output end is connected to the auxiliary shaft 33, so that the auxiliary shaft 33 drives the swing shuttle to swing synchronously relative to the needle 21 under the rotation of the main shaft 31.

The linkage structure for realizing the linkage of the main shaft 31 and the secondary shaft 33 can be in various forms, in the embodiment, the linkage structure comprises a transfer case 34 and a crank 343, the transfer case 34 is arranged adjacent to the secondary shaft 33, and specifically comprises a first rotating shaft 341 and a second rotating shaft 342 which are arranged side by side, wherein the first rotating shaft 341 and the second rotating shaft 342 both extend in the same direction with the main shaft 31 and the secondary shaft 33, and the first rotating shaft 341 is linked with the main shaft 31 and the second rotating shaft 342 is arranged adjacent to the secondary shaft 33. The crank 343 is rotatably connected to the first rotating shaft 341 at a first end thereof and is drivingly connected to the auxiliary shaft 33 at a second end thereof, and the crank 343 is intermittently operated on the auxiliary shaft 33 by the rotation of the first rotating shaft 341 so that the auxiliary shaft 33 drives the shuttle to synchronously reciprocate with respect to the main shaft 31.

The transfer case 34 can be designed in different ways, in this embodiment, the above-mentioned transfer case 34 is arranged below the secondary shaft 33, the crank 343 has a sector oscillating gear 344 extending upward at the top of the second end thereof, the sector oscillating gear 344 acts on the secondary shaft 33 and can drive the secondary shaft 33 to oscillate, and the secondary shaft 33 is provided with a tooth 332 meshing with the sector oscillating gear 344 at a corresponding position. Specifically, the coupling head 331 is provided on the counter shaft 33, the teeth 332 are provided on the outer wall of the coupling head 331, and the coupling head 331 is further provided with a stopper 333 for restricting the sector swing gear 344 from being disengaged from the coupling head 331. Thus, the design of the crank 343 and the sector swinging gear 344 enables the arc-shaped tooth portion of the sector swinging gear 344 to always extend upwards and swing within a certain range, thereby avoiding the situation of lateral extension or downward extension, so that no matter how the power source is arranged, the gravity center of the whole sector swinging gear 344 is always maintained on the auxiliary shaft 33, without large-amplitude deviation, avoiding the local excessive wear of the sector swinging gear 344 caused by uneven stress in other situations, and ensuring the service life. The swinging of the secondary shaft 33 can be realized by different movements of the sector swinging gear 344, one of which is eccentric, so that in the present embodiment, the crank 343 is eccentrically connected to the first rotating shaft 341.

In addition, each component described above operates under an oil pressure environment, so the linkage structure further includes a transfer case 36, the transfer case 36 is disposed at the rear side of the workbench 11 and has a hollow interior forming an oil pressure chamber 360, and a sealing cover for sealing the oil pressure chamber 360 is further provided at the bottom of the transfer case 36. The first and second transfer shafts 341 and 342 are provided in the hydraulic chamber 360, and the rear end of the counter shaft 33 extends into the hydraulic chamber 360. In order to ensure that the swing of the sector gear is not affected by the outside, a partition 361 is provided in the transfer case 36 to partition the oil pressure chamber 360 into a first chamber 36a and a second chamber 36b, the first transmission wheel 351 is provided in the first chamber 36a, and the crank 343 and the sector gear 344 are both provided in the second chamber 36 b.

In the present embodiment, in order to secure the first turning shaft 341 for power transmission of the main shaft, the first driving wheel 351 is provided on the first turning shaft 341, the second driving wheel 352 is provided on the main shaft 31, and the first turning shaft 341 is linked by a driving belt 353 provided in the first driving wheel 351 and the second driving wheel 352 in this order.

After the fan-shaped rotating and swinging gear 344 and the tooth 332 of the connector 331 are assembled, the fan-shaped rotating and swinging gear 344 and the tooth 332 of the connector 331 may be over-tightened or over-loosened, so that the linkage structure further comprises a gap eliminating structure 37 for adjusting a gap between the fan-shaped rotating and swinging gear 344 and the tooth 332 of the connector 331, the gap eliminating structure 37 comprises an eccentric shaft sleeve 371 and a gap eliminating hole 372 formed in a partition 361, and the eccentric shaft sleeve 371 is sleeved on the periphery of the second rotating shaft 342 and is embedded in the gap eliminating hole 372. Thus, the design and installation form of the eccentric sleeve 371 and the gap eliminating hole 372 is that the eccentric sleeve 371 has an inner ring and an outer ring, the outer ring is fixed with the gap eliminating hole 372, and the inner wall of the outer ring is of an eccentric structure, so that the inner ring connected to the second split shaft 342 can seek track on the inner wall of the outer ring. Just because the clearance on the inner circle and the outer circle circumference can be adjusted movably, when the fit of the sector swing gear 344 and the tooth 332 of the connector 331 is too tight or too loose, the second split shaft 342 can drive the sector swing gear 344 to move synchronously along with the movement of the inner circle, and then a certain movement margin is provided to compensate and adjust the fit clearance between the sector swing gear 344 and the tooth 332 of the connector 331, so that the sector swing gear 344 and the tooth 332 of the connector 331 are always in a delicate dynamic balance, and therefore, the requirement of clearance elimination is met, the strict standard of an assembly process is greatly reduced, and the noise generated when a machine runs can be effectively reduced. During actual adjustment, the locking screws for fixing the sector swinging gear 344 and the second rotating shaft 342 are loosened in advance, so that each component can operate normally, and after each gear operates to a proper position and cannot be locked (the sector swinging gear 344 and the tooth part 332 of the connector 331 automatically match to a proper position), the locking screws are locked again.

In this embodiment, the two ends of the eccentric sleeve 371 extend outward in the radial direction to form oil seals 373, and a gap is left between at least one of the oil seals 373 and the corresponding sidewall of the partition 361. Because the teeth on the sector swinging gear 344 are usually arranged obliquely, once there is a tooth position difference between the sector swinging gear 344 and the tooth part 332 of the connector 331, an axial force is generated, and therefore, due to the design of the gap between the oil seal and the partition plate, the axial force generated when the sector swinging gear and the connector tooth part are engaged and matched can act on the sector swinging gear in a reverse direction through the rotation of the auxiliary shaft, and is finally offset by the displacement of the eccentric shaft sleeve, so as to realize the adjustment of the tooth position.

Also, directional terms, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like, may be used in the description and claims to describe various example structural portions and elements of the invention, but are used herein for convenience of description only and are determined based on the example orientations shown in the figures. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims (10)

1. A pattern machine, comprising:

the device comprises a rack (1) and a clamping device, wherein the rack is provided with a workbench (11), the front side of the workbench (11) is provided with a processing station (1a), and the interior of the workbench is hollow to form a mounting cavity (1 b);

the sewing machine head (2) is arranged on the workbench (11), the front end of the sewing machine head is positioned above the processing station (1a), the front end of the sewing machine head (2) is provided with a needle head (21) extending downwards, and a driver (32) is also arranged in the sewing machine head (2);

the main shaft (31) is arranged in the sewing machine head (2) and extends in the same direction as the sewing machine head (2), one end of the main shaft (31) is connected to the driver (32), the other end of the main shaft is connected with the needle head (21), and the main shaft is driven by the driver (32) to rotate around the axis of the main shaft so as to drive the needle head (21) to move up and down relative to the processing station (1 a);

it is characterized by also comprising:

a secondary shaft (33) which is provided in the mounting cavity (1b) and extends in the same direction as the primary shaft (31), and a shuttle (38) is provided at the front end of the secondary shaft (33);

the linkage structure comprises a transfer case (34) and a crank (343), wherein the power input end of the transfer case (34) is connected with the main shaft (31), and the crank (343) is connected with the transfer case (34) and can intermittently act on the auxiliary shaft (33) under the rotation action of the main shaft (31) so that the auxiliary shaft (33) drives the shuttle (38) to synchronously swing to and fro relative to the needle (21).

2. The pattern machine of claim 1, wherein: the transfer case (34) is arranged adjacent to the auxiliary shaft (33) and comprises a first rotating shaft (341) and a second rotating shaft (342) which are arranged side by side, the first rotating shaft (341) and the second rotating shaft (342) both extend in the same direction with the main shaft (31) and the auxiliary shaft (33), the first rotating shaft (341) is linked with the main shaft (31), the second rotating shaft (342) is arranged adjacent to the auxiliary shaft (33), the first end of the crank (343) is rotatably connected to the first rotating shaft (341) and is eccentrically arranged, and the second end of the crank is in driving connection with the auxiliary shaft (33).

3. The pattern machine of claim 2, wherein: the transfer case (34) is arranged below the auxiliary shaft (33), the crank (343) extends upwards at the top of the second end thereof to form a sector swing gear (344), the sector swing gear (344) acts on the auxiliary shaft (33) and can drive the auxiliary shaft (33) to swing, and the auxiliary shaft (33) is provided with a tooth part (332) meshed with the sector swing gear (344) at a corresponding position.

4. The pattern machine of claim 3, wherein: the auxiliary shaft (33) is provided with a connector (331), the tooth part (332) is arranged on the outer wall of the connector (331), and a rib (333) for limiting the fan-shaped rotating and swinging gear (344) to be separated from the connector (331) is further arranged on the connector (331).

5. The pattern machine of claim 4, wherein: the first transmission shaft (341) is provided with a first transmission wheel (351), the main shaft (31) is provided with a second transmission wheel (352), and the first transmission shaft (341) is linked through a transmission belt (353) which is sequentially wound on the first transmission wheel (351) and the second transmission wheel (352).

6. The pattern machine of claim 5, wherein: the linkage structure further comprises a transfer case (36), the transfer case (36) is arranged on the rear side of the workbench (11), an oil pressure cavity (360) is formed in the hollow portion of the transfer case (36), the first transfer shaft (341) and the second transfer shaft (342) are arranged in the oil pressure cavity (360), and the rear end of the auxiliary shaft (33) extends into the oil pressure cavity (360).

7. The pattern machine of claim 6, wherein: a partition plate (361) is arranged in the transfer case (36) to partition the oil pressure cavity (360) into a first cavity (36a) and a second cavity (36b), the first transmission wheel (351) is arranged in the first cavity (36a), and the crank (343) and the sector swing gear (344) are both arranged in the second cavity (36 b).

8. The pattern machine of claim 7, wherein: linkage structure still including being used for eliminating fan-shaped commentaries on classics pendulum gear (344) and connector (331) tooth portion (332) between clearance structure (37) in the clearance, clearance structure (37) include eccentric shaft sleeve (371) and set up eliminate clearance hole (372) on baffle (361), eccentric shaft sleeve (371) cover is established the periphery of second split axle (342) and inlay and establish in eliminate in clearance hole (372).

9. The pattern machine of claim 8, wherein: both ends of the length direction of the eccentric shaft sleeve (371) extend outwards along the radial direction to form oil seals (373), and a gap is reserved between at least one oil seal (373) and the corresponding side wall of the partition plate (361).

10. The pattern machine of claim 1, wherein: an operation table plate (111) is arranged on the front side of the workbench (11), the processing station (1a) is formed on the operation table plate (111), and a needle hole (112) for a needle head (21) to extend into is formed in the operation table plate (111).

Images