An on-loom cutting device for a velvet loom

Abstract

The present application relates to the technical field of textile machinery manufacturing, and especially to a on-machine cutting device suitable for velvet looms. A guide beam is fixed on a machine frame and horizontally located downstream of a reed. A power unit and a guide wheel unit cooperatively pull a rope to drag a cutting assembly to perform a reciprocating displacement motion along the length direction of the guide beam. The power unit for providing kinetic energy support for the displacement motion of the cutting assembly includes a motor, a first plane fixed shaft gear train, a cam transmission mechanism, a second plane fixed shaft gear train and a traction wheel. The rotational torque output by the motor is sequentially transmitted to the traction wheel via the first plane fixed shaft gear train, the cam transmission mechanism and the second plane fixed shaft gear train. The traction wheel is wound by the rope for multiple turns. In this way, on the one hand, the rotational torque has a high transmission ratio in the transmission process, thereby effectively improving the cutting efficiency; on the other hand, it is beneficial to ensure that the actual running track of the cutting assembly tends to coincide with the theoretically designed track, thereby improving the quality inspection qualified rate of the velvet product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile machinery manufacturing, and particularly relates to a on-loom cutting device suitable for a velvet loom. BACKGROUND

[0002] Velvet cloth is a high-end textile fabric, which is widely applied to various fields such as clothes and furniture. The double-layer weaving method (the weaving process can be implemented by a shuttle loom and a shuttleless loom) is used to connect the upper layer and the lower layer by a velvet structure, and then the connecting line between the upper layer and the lower layer is cut by a cutting knife, so that the fabric can be split.

[0003] In the cutting process, the double-layer fabric is woven and then cut on the loom, which has the advantages that the weaving machine is relatively simple, and the cutting machine can be configured with two or three dozen looms. However, the disadvantages are also very obvious, which are specifically shown as follows: the defects of the velvet surface can be found only after cutting, at this time, a large number of defective fabrics have been produced, which is unacceptable for any factory that pursues lean production. Therefore, in this background, the on-loom cutting device that weaves and cuts simultaneously has appeared in the market. The GD6511 on-loom cutting velvet loom of Jiangsu Suzhou No. 2 Textile Machinery Factory in the 1980s has the on-loom cutting function, but the cutting knife is easy to jump, the velvet surface is not flat, and the on-loom cutting velvet loom cannot be produced in large quantities. The double-shed double-rapier velvet loom produced by Belgium Van de Veld is suitable for heavy velvet, but the price is too high, and the on-loom cutting velvet loom is not suitable for general single-shed shuttle looms, rapier looms, water-jet looms and air-jet looms, and is not suitable for the double-shed double-rapier loom produced in China.

[0004] In the field of the weaving velvet loom, the cutting pile device in the prior art mainly consists of a cutting pile assembly, a guide beam, a pulling rope, a guide wheel unit and a power part. The guide beam is fixed on the rack and lies downstream of the steel reed of the velvet loom. The power part and the guide wheel unit are both borne by the rack, and the two cooperate with the pulling rope to drag the cutting pile assembly to perform a reciprocating displacement motion along the length direction of the guide beam, so that the cutting pile operation of the fabric is completed. According to the current industry status, the matching power part consists of a motor, a gear reversing mechanism and a crank connecting rod mechanism, and the motor speed needs to be adjusted in real time during the actual cutting pile operation. The gear reversing mechanism and the crank connecting rod mechanism both have a relatively complex design structure, and contain a large number of parts, which causes great inconvenience to part manufacturing and assembly work. More importantly, in actual application, the power output of the power part is unstable and inaccurate. The reason is that it is difficult to perfectly eliminate the assembly gap between the parts constituting the gear reversing mechanism or the crank connecting rod during the assembly and debugging stage, and the assembly gap tends to increase due to the wear factor as the running time extends. In this way, on the one hand, it will seriously reduce the cutting pile efficiency, which will inevitably affect the full play of the work efficiency of the upstream weaving function part, and the working noise is extremely large; on the other hand, the motion accuracy of the crank connecting rod mechanism is poor, and the actual running track deviates greatly from the theoretical design track, thereby causing the problem of frequent rejection of velvet products due to the inconsistent pile height of the fabric remaining on the surface of the velvet product. Therefore, it is urgent for technical personnel to solve the above problems. SUMMARY

[0005] Therefore, the project team collects relevant data, evaluates and considers various aspects, and continuously experiments and modifies through the project team personnel, and finally leads to the emergence of the on-machine cutting pile device suitable for the velvet loom.

[0006] In order to solve the above technical problems, the present application relates to a cutting pile device suitable for a velvet loom for performing cutting pile layering operation on woven fabric, comprising a cutting pile assembly, a guide beam, a pulling rope, a guide wheel unit and a power part. The guide beam is fixed on the rack and lies downstream of the steel reed of the velvet loom. The power part and the guide wheel unit are both borne by the rack, and the two cooperate with the pulling rope to drag the cutting pile assembly to perform a reciprocating displacement motion along the length direction of the guide beam. The power part includes a motor, a first plane fixed shaft gear train, a cam transmission mechanism, a second plane fixed shaft gear train and a traction wheel. The motor is fixed on the rack, and the rotation torque output by the motor is sequentially transmitted to the traction wheel through the first plane fixed shaft gear train, the cam transmission mechanism and the second plane fixed shaft gear train. The traction wheel is wound by the pulling rope for multiple turns, and continuously performs forward and reverse rotation motion when subjected to the rotation torque.

[0007] As a further improvement of the disclosed technical solution, the first plane fixed axis gear train comprises a first transmission shaft, a second transmission shaft, a third transmission shaft, a first gear, a second gear, a third gear and a fourth gear. The second plane fixed axis gear train comprises a fourth transmission shaft, a fifth transmission shaft, a sixth transmission shaft, a fifth gear, a sixth gear, a seventh gear and a sectorial swing gear. The first transmission shaft is coupled to the main output shaft of the motor by a shaft coupling. The first gear and the fourth gear are assembled to the first transmission shaft and the third transmission shaft respectively by a key coupling. The second gear and the third gear are assembled to the second transmission shaft by a key coupling. The first gear is engaged with the second gear. The fourth gear is engaged with the third gear. The sixth transmission shaft is used to directly drive the traction wheel, and when the two are subjected to a rotating torque, they synchronously perform a circumferential rotation. The sectorial swing gear is sleeved and fixed to the fourth transmission shaft. The fifth gear and the sixth gear are assembled to the fifth transmission shaft by a key coupling. The seventh gear is assembled to the sixth transmission shaft by a key coupling. The sectorial swing gear is engaged with the fifth gear. The sixth gear is engaged with the seventh gear. The cam transmission mechanism is used as a power transmission transition between the third transmission shaft and the fourth transmission shaft, and the rotating torque is transmitted from the third transmission shaft to the fourth transmission shaft, and the sectorial swing gear continuously performs forward and reverse rotation.

[0008] As a further improvement of the disclosed technical solution, the cam transmission mechanism comprises a cylindrical cam, a first driven component and a second driven component. The cylindrical cam is sleeved and fixed to the third transmission shaft, and a guide contour is formed thereon. The first driven component and the second driven component are installed in different directions and are assembled to the non-toothed outer contour surface of the sectorial swing gear, and the center axes of the two components intersect at a point. When the cylindrical cam continuously performs a circumferential rotation under the action of a rotating torque, the first driven component and the second driven component perform displacement movements along the extension directions of the two opposite side walls of the guide contour.

[0009] As a further improvement of the disclosed technical solution, the first driven component comprises a first driven shaft and a first bearing. The second driven component comprises a second driven shaft and a second bearing. The first driven shaft and the second driven shaft are inserted into the sectorial swing gear. The first bearing and the second bearing are sleeved on the first driven shaft and the second driven shaft respectively, and when subjected to the friction force from the guide contour, they can freely perform a circumferential rotation around their respective center axes.

[0010] As a further improvement of the disclosed technical solution, the guide wheel unit comprises a first guide wheel, a second guide wheel, a third guide wheel, a fourth guide wheel and a fifth guide wheel. The first guide wheel, the second guide wheel, the third guide wheel, the fourth guide wheel and the fifth guide wheel are assembled to the rack and cooperatively drag the traction rope with the traction wheel.

[0011] As a further improvement of the disclosed technical solution, the on-machine cutting device for the velvet loom further comprises a tensioning unit. The tensioning unit is used to apply a tensioning force to the pulling rope, and comprises a tensioning wheel, a wheel seat and a linear drive module. The rack is provided with a strip-shaped guiding notch for accommodating the wheel seat and extending along the width direction of the velvet loom. The tensioning wheel is assembled on the wheel seat and wound by the pulling rope. The linear drive module is used to drive the wheel seat to perform a sliding movement along the length direction of the strip-shaped guiding notch, and is borne by the rack.

[0012] As a further improvement of the disclosed technical solution, the linear drive module comprises a manual screw rod and a screw rod mounting seat. The screw rod mounting seat is fixed to the rack and arranged outside the strip-shaped guiding notch in line with the strip-shaped guiding notch. The manual screw rod is inserted into the screw rod mounting seat. The wheel seat is provided with an internal threaded hole for freely rotating the manual screw rod. When the end of the manual screw rod freely performs a circumferential rotating movement under the action of a torsional moment, the wheel seat performs a sliding movement along the strip-shaped guiding notch under the action of an axial force from the manual screw rod.

[0013] As a further improvement of the disclosed technical solution, the cutting assembly is preferably a combined structure, comprising a knife seat and a cutting knife. The two ends of the knife seat are respectively used to tie and fix the two free ends of the pulling rope. The cutting knife is detachably coupled to realize assembly with the knife seat.

[0014] As a further improvement of the disclosed technical solution, the on-machine cutting device for the velvet loom further comprises a fabric guiding mechanism. The fabric guiding mechanism is arranged downstream of the reed and upstream of the cutting assembly, and the formed fabric is always aligned with the cutting knife under the assistance of the fabric guiding mechanism.

[0015] As a further improvement of the disclosed technical solution, the fabric guiding mechanism comprises a driving mechanism, an upper cross beam, a lower cross beam, an upper fabric limiting assembly and a lower fabric limiting assembly. The upper cross beam and the lower cross beam are oppositely arranged along the height direction and perform a relative displacement movement under the action of a driving force from the driving mechanism. The upper fabric limiting assembly and the lower fabric limiting assembly are respectively borne by the upper cross beam and the lower cross beam, and a through gap is formed between the upper fabric limiting assembly and the lower fabric limiting assembly for the formed fabric to freely pass through.

[0016] As a further improvement of the disclosed technical solution, the driving mechanism comprises a front lead screw, a rear lead screw, a first front nut, a second front nut, a first rear nut and a second rear nut. The front lead screw and the rear lead screw are vertically arranged and detachably fixed to one side of the rack at a distance. The first front nut matched with the front lead screw and the first rear nut matched with the rear lead screw are respectively welded and fixed to the front and rear ends of the upper cross beam. The second front nut matched with the front lead screw and the second rear nut matched with the rear lead screw are respectively welded and fixed to the front and rear ends of the lower cross beam. When the front lead screw and the rear lead screw are simultaneously driven to synchronously perform circumferential rotation, the upper cross beam and the lower cross beam perform displacement motion towards or away from each other, and the width value d of the slit is adaptively changed.

[0017] In the working process of the pile weaving machine, the warp and weft are cooperated with the function parts such as the rapier, the pile weaving machine reed and the like to complete the textile forming of the fabric, and then are fed to the cutting pile device to continuously perform the cutting pile layering operation, and finally form two independent piles which are synchronously wound and stored by the two winding drums. When the cutting pile layering operation is performed on the fabric, the motor is first started, and the rotation torque is sequentially transmitted to the traction wheel through the first plane fixed shaft gear train, the cam transmission mechanism and the second plane fixed shaft gear train, and the traction wheel cooperates with the traction rope to drag the cutting pile assembly to alternately perform the forward and reverse sliding motion, so that the fabric is gradually completed cutting pile layering.

[0018] In practical application, the cutting pile device suitable for the pile weaving machine disclosed by the application can achieve the following beneficial technical effects, specifically:

[0019] 1) The first plane fixed shaft gear train, the cam transmission mechanism and the second plane fixed shaft gear train cooperate to realize the transmission of the rotation torque, and compared with the traditional power transmission mechanical mechanism (such as the crank connecting rod mechanism), the power transmission process is more stable, and has a higher transmission ratio. The reason is that the center axes of the plurality of gears included in the first plane fixed shaft gear train and the second plane fixed shaft gear train are parallel to each other; the cam transmission mechanism can realize very precise axial displacement, and when it is necessary to change the motion trajectory, only the design curvature of the cam needs to be adjusted, which gives engineers great design convenience;

[0020] 2) in the rotation torque transmission process, each gear always maintains a good meshing state, the transmission stress is evenly distributed on the meshing surface of each gear; and the cam and the driven member constituting the cam transmission mechanism always maintain a good matching state, thereby not only effectively ensuring the accuracy of the rotation torque transmission, but also making the rotation torque transmission process extremely smooth, in this way, on the one hand, it is beneficial to ensure that the actual running track of the cutting pile assembly tends to coincide with the theoretical design track, thereby effectively reducing the probability of the phenomenon of the fabric pile of the finished product surface being discarded due to the inconsistency of the pile height; on the other hand, it can effectively avoid the phenomenon of excessive impact stress leading to excessive noise or premature damage of the power part, thereby effectively prolonging the service life of the first plane fixed shaft wheel system, the second plane fixed shaft wheel system and the cam transmission mechanism;

[0021] 3) due to the design characteristics of the first plane fixed shaft wheel system, the cam transmission mechanism and the second plane fixed shaft wheel system, the rotation torque has a high transmission ratio in the transmission process, thereby effectively improving the cutting efficiency and facilitating the full play of the working efficiency of the upstream weaving function part;

[0022] 4) through the above comprehensive linkage, it is easy to realize the consistency of the cutting beat and the weaving beat, the obtained cutting surface is relatively flat, and the design structure is simple and ingenious, which is deeply welcomed by the market. More importantly, the cutting device has low cost, and is not only suitable for double-shed double-rapier installation, but also can be widely used in single-shed double-shed looms with shuttles, water jets, air jets and rapier, which is deeply welcomed by the market. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 is the first perspective view of the on-machine cutting device for the velvet loom in the present application.

[0025] Figure 2 is the second perspective view of the on-machine cutting device for the velvet loom in the present application.

[0026] Figure 3 is the side view of Figure 1 .

[0027] Figure 4 is the I partial enlarged view of Figure 1 .

[0028] Figure 5 is the perspective view of the cutting assembly of the on-loom cutting device of the invention for use in a velvet loom.

[0029] Figure 6 is the perspective view of the second view of the on-loom cutting device of the invention for use in a velvet loom (only the traction wheel, the guide wheel unit and the tension unit are retained).

[0030] Figure 7 is the perspective view of the first view of the power unit of the on-loom cutting device of the invention for use in a velvet loom.

[0031] Figure 8 is the perspective view of the second view of the power unit of the on-loom cutting device of the invention for use in a velvet loom.

[0032] Figure 9 is the perspective view of the third view of the power unit of the on-loom cutting device of the invention for use in a velvet loom.

[0033] Figure 10 is the perspective view of the first view of the cylindrical cam of the on-loom cutting device of the invention for use in a velvet loom.

[0034] Figure 11 is the perspective view of the second view of the cylindrical cam of the on-loom cutting device of the invention for use in a velvet loom.

[0035] Figure 12 is the perspective view of the first driven assembly of the on-loom cutting device of the invention for use in a velvet loom.

[0036] Figure 13 is the perspective view of the second driven assembly of the on-loom cutting device of the invention for use in a velvet loom.

[0037] Figure 14 is the perspective view of the first view of the tension unit of the on-loom cutting device of the invention for use in a velvet loom.

[0038] Figure 15 is the perspective view of the second view of the tension unit of the on-loom cutting device of the invention for use in a velvet loom.

[0039] Figure 16 is the perspective view of the fabric guide mechanism of the on-loom cutting device of the invention for use in a velvet loom.

[0040] 1 - cutting assembly; 11 - knife holder; 12 - cutting knife; 2 - guide beam; 3 - pulling rope; 4 - guide wheel unit; 41 - first guide wheel; 42 - second guide wheel; 43 - third guide wheel; 44 - fourth guide wheel; 45 - fifth guide wheel; 5 - power unit; 51 - motor; 52 - first planar fixed-axle gear train; 521 - first transmission shaft; 522 - second transmission shaft; 523 - third transmission shaft; 524 - first gear wheel; 525 - second gear wheel; 526 - third gear wheel; 527 - fourth gear wheel; 53 - cam transmission mechanism; 531 - cylindrical cam; 5311 - guide profile; 532 - first driven assembly; 5321 - first driven shaft; 5322 - first bearing; 533 - second driven assembly; 5331 - second driven shaft; 5332 - second bearing; 54 - second planar fixed-axle gear train; 541 - fourth transmission shaft; 542 - fifth transmission shaft; 543 - sixth transmission shaft; 544 - fifth gear wheel; 545 - sixth gear wheel; 546 - seventh gear wheel; 547 - sectorial wobble gear; 55 - traction wheel; 6 - tensioning unit; 61 - tensioning wheel; 62 - wheel seat; 63 - linear drive module; 631 - manual screw; 632 - screw mounting seat; 7 - fabric guide mechanism; 71 - drive mechanism; 711 - front lead screw; 712 - rear lead screw; 713 - first front lead nut; 714 - second front lead nut; 715 - first rear lead nut; 716 - second rear lead nut; 72 - upper cross beam; 73 - lower cross beam; 74 - upper fabric limiting assembly; 75 - lower fabric limiting assembly. DETAILED DESCRIPTION

[0041] In the description of the present application, it should be understood that the terms "front", "back", "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] The disclosed content of the present application will be further described in detail below in conjunction with specific embodiments. The cutting device is used to perform the cutting and layering operation on the fabric formed by the velvet loom. As shown in Figure 1 , 2 , 4, the on-machine cutting device suitable for the velvet loom mainly consists of a cutting assembly 1, a guide beam 2, a pulling rope 3, a guide wheel unit 4, and a power unit 5. Among them, the guide beam 2 is fixed on the machine frame and lies downstream of the steel guide of the velvet loom. The power unit 5 and the guide wheel unit 4 are both borne by the machine frame, and the two cooperate with the pulling rope 3 to drag the cutting assembly 1 to perform reciprocating displacement movement along the length direction of the guide beam 2.

[0043] As shown in Figure 7As shown in the figure, the power unit 5 is mainly composed of a motor 51, a first plane fixed shaft gear train 52, a cam transmission mechanism 53, a second plane fixed shaft gear train 54, and a traction wheel 55. The motor 51 is detachably fixed to the front side of the frame, and the rotation torque output by the motor is sequentially transmitted to the traction wheel 55 through the first plane fixed shaft gear train 52, the cam transmission mechanism 53, and the second plane fixed shaft gear train 54. The traction wheel 55 is wound by multiple turns of the pulling rope 3, and continuously performs forward and reverse rotation when subjected to the rotation torque, while the velvet cutting assembly 1 performs reciprocating displacement along the length direction of the guide beam 2, and the fabric cutting operation is implemented.

[0044] In the working process of the velvet loom, the warp and weft are cooperated by the functions of the rapier, reed, etc. to complete the textile forming of the fabric, and then fed to the velvet cutting device 1 to continue the velvet cutting and layering operation, and finally two independent velvet fabrics are formed and synchronously wound by the two winding drums. When the velvet cutting and layering operation is performed on the fabric, the motor 51 is first started, and the rotation torque is sequentially transmitted to the traction wheel 55 through the first plane fixed shaft gear train 52, the cam transmission mechanism 53, and the second plane fixed shaft gear train 54, and the traction wheel 55 cooperates with the pulling rope 3 to drag the velvet cutting assembly to alternately perform forward and reverse sliding motion, and the fabric is gradually completed by the velvet cutting and layering.

[0045] It should be noted that, due to the design characteristics of the first plane fixed shaft gear train 52, the cam transmission mechanism 53, and the second plane fixed shaft gear train 54, the rotation torque has a high transmission ratio in the transmission process, which can effectively improve the cutting efficiency and fully exert the working efficiency of the upstream weaving function unit.

[0046] As Figure 8As shown, the first planar fixed-axis gear train 52 includes a first drive shaft 521, a second drive shaft 522, a third drive shaft 523, a first gear 524, a second gear 525, a third gear 526, and a fourth gear 527. The second planar fixed-axis gear train 54 includes a fourth drive shaft 541, a fifth drive shaft 542, a sixth drive shaft 543, a fifth gear 544, a sixth gear 545, a seventh gear 546, and a sector-shaped yaw gear 547. The first drive shaft 521 is connected to the main output shaft of the motor via a coupling. The first gear 524 and the fourth gear 527 are keyed to the first drive shaft 521 and the third drive shaft 523, respectively. The second gear 525 and the third gear 526 are both keyed to the second drive shaft 522. The first gear 524 meshes with the second gear 525. The fourth gear 527 meshes with the third gear 526. A sector-shaped oscillating gear 547 is mounted and fixed to the fourth drive shaft 541. The fifth gear 544 and the sixth gear 545 are both keyed to the fifth drive shaft 542. The seventh gear 546 is keyed to the sixth drive shaft 543. The sector-shaped oscillating gear 547 meshes with the fifth gear 544. The sixth gear 545 meshes with the seventh gear 546. The cam drive mechanism 53 serves as a power transmission transition between the third drive shaft 523 and the fourth drive shaft 541, allowing torque to be transmitted from the third drive shaft 523 to the fourth drive shaft 541, enabling the sector-shaped oscillating gear 547 to continuously perform forward and reverse rotational motion.

[0047] like Figure 8 , 9 As shown, the cam transmission mechanism 53 mainly consists of a cylindrical cam 531, a first driven component 532, and a second driven component 533. The cylindrical cam 531 is mounted and fixed on the third transmission shaft 523, and a guide profile 5311 is formed on it (as shown in the image). Figure 10 , 11 (As shown in the diagram). The first driven assembly 532 and the second driven assembly 533 are installed in different directions and are both assembled on the non-toothed outer contour surface of the sector yaw gear 547, with their central axes intersecting at a single point. As the cylindrical cam 531 continuously performs circumferential rotation due to the rotational torque, the first driven assembly 532 and the second driven assembly 533 perform displacement movements along the extension directions of the two opposing sidewalls of the guide contour 5311, respectively.

[0048] In actual operation, the first planar fixed shaft gear train 52, the cam transmission mechanism 53 and the second planar fixed shaft gear train 54 cooperate to realize the transmission of the rotating torque. Compared with the traditional power transmission mechanical mechanism (for example, the crank connecting rod mechanism), the power transmission process is more stable, and the transmission ratio is higher. The reason is that the center axes of the first gear 524, the second gear 525, the third gear 526 and the fourth gear 527 are parallel to each other, and the center axes of the fifth gear 544, the sixth gear 545, the seventh gear 546 and the sectorial eccentric gear 547 are also parallel to each other. In addition, according to the design structure characteristics, the cam transmission mechanism 53 can realize very precise axial displacement, and when it is necessary to change the motion trajectory, only the design curvature of the guide contour 5311 needs to be adjusted, which gives engineers great design convenience.

[0049] Furthermore, in the rotating torque transmission process, the gears of the first planar fixed shaft gear train 52 and the gears of the second planar fixed shaft gear train 54 always maintain a good meshing state, and the transmission stress is uniformly distributed on the meshing surfaces of the gears; and the first driven assembly 532 and the second driven assembly 533 always maintain a good matching state with respect to the cylindrical cam 531, thereby not only effectively ensuring the accuracy of the rotating torque transmission, but also making the rotating torque transmission process very stable. In this way, on the one hand, it is beneficial to ensure that the actual running trajectory of the cutting pile assembly 1 tends to coincide with the theoretical design trajectory, thereby effectively reducing the probability of the phenomenon of the surface of the finished pile fabric being discarded due to the inconsistency of the pile height; on the other hand, it can effectively avoid the phenomenon of excessive impact stress leading to excessive noise or premature damage of the power part 5, thereby effectively prolonging the service life of the first planar fixed shaft gear train 52, the second planar fixed shaft gear train 54 and the cam transmission mechanism 53.

[0050] In the small batch trial stage, the first driven assembly 532 and the second driven assembly 533 are both selected as metal bars. However, in actual operation, it is found that the metal bars are easily worn out due to the long-term friction force from the guide contour, thereby making it difficult to meet the original design requirements for the assembly accuracy of the first driven assembly 532 and the second driven assembly 533 with respect to the cylindrical cam 531. As a result, not only will it affect the accuracy of the running trajectory of the cutting pile device 1, increase the working noise of the power part 5, but also will lead to the problem of the overall transmission efficiency of the power part 5 being reduced. In view of this, as a further optimization of the above technical solution, the first driven assembly 532 and the second driven assembly 533 are both selected as plastic bars. Figure 12 、 13As shown in the figure, the first driven assembly 532 comprises a first driven shaft 5321 and a first bearing 5322. The second driven assembly 533 comprises a second driven shaft 5331 and a second bearing 5332. The first driven shaft 5321 and the second driven shaft 5331 are both inserted into the sectorial eccentric gear 547. The first bearing 5322 and the second bearing 5332 are respectively and one-to-one fitted on the first driven shaft 5321 and the second driven shaft 5331, and when they are subjected to the friction force from the guide contour, they can freely perform the circumferential rotation motion 5311 about their respective central axes. In the process of the first driven assembly 532 and the second driven assembly 533 performing the displacement motion along the guide contour 5311, due to the intervention of the first bearing 5322 and the second bearing 5332, the sliding friction form in the initial design is changed into the rolling friction form, so that not only the motion trajectory accuracy of the first driven assembly 532 and the second driven assembly 533 is effectively improved, but also the service life of the first driven assembly 532 and the second driven assembly 533 is greatly improved, thereby reducing the later maintenance frequency and cost.

[0051] As shown in the figure, Figure 6 As shown in the figure, the guide wheel unit 4 is used to maintain the application posture of the pulling rope 3, which mainly comprises a first guide wheel 41, a second guide wheel 42, a third guide wheel 43, a fourth guide wheel 44, and a fifth guide wheel 45. The first guide wheel 41, the second guide wheel 42, the third guide wheel 43, the fourth guide wheel 44, and the fifth guide wheel 45 are all assembled on the rack, and cooperates with the traction wheel 55 to realize the reciprocating dragging of the pulling rope 3.

[0052] As known, according to the common sense in the industry, whether the tensioning state of the pulling rope 3 is reasonable will directly affect the operation parameters of the cutting pile assembly 1, and will inevitably affect the cutting pile efficiency and quality. In view of this, as a further optimization of the above technical solution, as shown in the figure, Figure 1 2 As shown in the figure, the on-machine cutting pile device for the velvet loom is further provided with a tensioning unit 6. The tensioning unit 6 is used to apply a tensioning force to the pulling rope 3, which comprises a tensioning wheel 61, a wheel seat 62, and a linear driving module 63. The rack is provided with a strip-shaped guide notch for the wheel seat 62 to be installed, which extends along the width direction of the velvet loom. The tensioning wheel 61 is assembled on the wheel seat 62 and is wound by the pulling rope 3. The linear driving module 63 is used to drive the wheel seat 62 to perform a sliding motion along the length direction of the strip-shaped guide notch, and it is borne by the rack (as shown in the figure Figure 14 15 In actual application, when it is detected that the tensioning state of the pulling rope 3 cannot meet the design requirements, the worker only needs to start the linear driving module 63, and the wheel seat 62 drives the tensioning wheel 61 to perform a displacement motion along the strip-shaped guide notch, until the tensioning degree of the pulling rope 3 is maintained within a reasonable value range.​​

[0053] As a further refinement of the above technical solution, as shown in Figure 15 The linear drive module 63 comprises a hand screw 631 and a screw mounting seat 632. The screw mounting seat 632 is fixed on the frame and arranged outside the strip-shaped guiding notch. The hand screw 631 is inserted into the screw mounting seat 632. The wheel seat 62 is provided with an internal thread hole for the free rotation of the hand screw. When the end of the hand screw 631 freely performs a circumferential rotation movement due to the action of a torsional moment, the wheel seat 62 performs a sliding movement along the strip-shaped guiding notch due to the action of an axial force from the hand screw 631.

[0054] As shown in Figure 5 The cutting pile assembly 1 is preferably a combined structure comprising a cutter seat 11 and a cutting pile cutter 12. The two ends of the cutter seat 11 are used to tie and fix the two free ends of the pulling rope 3. The cutting pile cutter 12 is detachably coupled to the cutter seat 11. By using the above technical solution, when the cutting pile cutter 12 is worn out after a period of use, the worker can quickly and rapidly remove it from the cutter seat 11 and perform a reassembly operation.

[0055] As shown in Figure 1 、 2 , 3, the on-machine cutting pile device suitable for the velvet loom is also provided with a fabric guiding mechanism 7. The fabric guiding mechanism 7 is arranged downstream of the reed and upstream of the cutting pile assembly 1. Under the assistance of the fabric guiding mechanism 7, the formed fabric is always aligned with the cutting pile cutter 12, ensuring that the finished pile fabric has very high cutting pile quality.

[0056] It is known that according to design common sense, the fabric guiding mechanism 7 can adopt various design structures to guide the position of the fabric, but here a design structure is recommended which is simple in design, easy to manufacture and implement, and convenient for fine adjustment operation in specific application, specifically as shown in Figure 16As shown in the figure, the fabric guiding mechanism 7 comprises a driving mechanism 71, an upper cross beam 72, a lower cross beam 73, an upper fabric limiting assembly 74 and a lower fabric limiting assembly 75. The upper cross beam 72 and the lower cross beam 73 are oppositely arranged along the height direction and perform the approaching or opposite displacement movement when driven by the driving force from the driving mechanism 71. The upper fabric limiting assembly 74 and the lower fabric limiting assembly 75 are respectively borne by the upper cross beam 72 and the lower cross beam 73, and a through gap is formed between them for the free passage of the shaped fabric. The driving mechanism 71 mainly comprises a front lead screw 711, a rear lead screw 712, a first front nut 713, a second front nut 714, a first rear nut 715 and a second rear nut 716. The front lead screw 711 and the rear lead screw 712 are vertically arranged and detachably fixed to one side of the rack with a certain interval. The first front nut 713 matched with the front lead screw 711 and the first rear nut 715 matched with the rear lead screw 712 are respectively welded and fixed to the front end and the rear end of the upper cross beam 72. The second front nut 714 matched with the front lead screw 711 and the second rear nut 716 matched with the rear lead screw 712 are respectively welded and fixed to the front end and the rear end of the lower cross beam 73. When the front lead screw 711 and the rear lead screw 712 are simultaneously driven to synchronously perform the circumferential rotation, the upper cross beam 72 and the lower cross beam 73 perform the approaching or opposite displacement movement, and the width value d of the through gap is adaptively changed (as shown in the figure) to better adapt to the thickness of the pre-cut fabric. Figure 3

[0057] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.​

Claims

1. A on-loom cutting device for velvet loom, for performing cutting and layering operation on a woven and shaped fabric, comprising a cutting assembly, a guide beam, a pulling rope, a guide wheel unit and a power unit; the guide beam is fixed on the frame and lies downstream of the velvet loom reed; the power unit and the guide wheel unit are both borne by the frame and cooperate with the pulling rope to drag the cutting assembly to perform reciprocating displacement movement along the length direction of the guide beam, characterized in that, The power unit comprises a motor, a first fixed-axle plane gear train, a cam transmission mechanism, a second fixed-axle plane gear train and a traction wheel; the motor is fixed on a frame, and the rotating torque outputted by the motor is sequentially transmitted to the traction wheel through the first fixed-axle plane gear train, the cam transmission mechanism and the second fixed-axle plane gear train; the traction wheel is wound by the traction rope for multiple turns, and continuously performs forward and reverse rotation when subjected to the rotating torque; The first fixed-axle plane gear train comprises a first transmission shaft, a second transmission shaft, a third transmission shaft, a first gear, a second gear, a third gear and a fourth gear; the second fixed-axle plane gear train comprises a fourth transmission shaft, a fifth transmission shaft, a sixth transmission shaft, a fifth gear, a sixth gear, a seventh gear and a sectorial wobble gear; the first transmission shaft is coupled with the main output shaft of the motor by a shaft coupling; the first gear and the third gear are assembled with the first transmission shaft and the third transmission shaft respectively by key coupling; the second gear and the third gear are assembled with the second transmission shaft by key coupling; the first gear is engaged with the second gear; the fourth gear is engaged with the third gear; the sixth transmission shaft directly drives the traction wheel, and performs synchronous circumferential rotation when subjected to the rotating torque; the sectorial wobble gear is sleeved and fixed on the fourth transmission shaft; the fifth gear and the sixth gear are assembled with the fifth transmission shaft by key coupling; the seventh gear is assembled with the sixth transmission shaft by key coupling; the sectorial wobble gear is engaged with the fifth gear; the sixth gear is engaged with the seventh gear; The cam transmission mechanism is used as a power transmission transition between the third transmission shaft and the fourth transmission shaft, and the rotating torque is transmitted from the third transmission shaft to the fourth transmission shaft, and the sectorial wobble gear continuously performs forward and reverse rotation; The cam transmission mechanism comprises a cylindrical cam, a first driven assembly and a second driven assembly; the cylindrical cam is sleeved and fixed on the third transmission shaft, and a guide contour is formed on the cylindrical cam; the first driven assembly and the second driven assembly are installed in different directions and assembled on the non-toothed outer contour surface of the sectorial wobble gear, and the center axes of the first driven assembly and the second driven assembly intersect at a point; when the cylindrical cam continuously performs circumferential rotation under the action of the rotating torque, the first driven assembly and the second driven assembly respectively perform displacement motion along the extension directions of the two opposite side walls of the guide contour.

2. The on-loom cutting device for use in a velvet loom according to claim 1, characterized in that, The first driven assembly comprises a first driven shaft and a first bearing; the second driven assembly comprises a second driven shaft and a second bearing; the first driven shaft and the second driven shaft are both inserted into the sectorial eccentric gear; the first bearing and the second bearing are respectively and one-to-one fitted on the first driven shaft and the second driven shaft, and can freely perform circumferential rotation movement around their respective central axes when subjected to friction force from the guide wheel profile.

3. The on-loom cutting device for use in a velvet loom according to any one of claims 1-2, characterized in that, The guide wheel unit comprises a first guide wheel, a second guide wheel, a third guide wheel, a fourth guide wheel and a fifth guide wheel; the first guide wheel, the second guide wheel, the third guide wheel, the fourth guide wheel and the fifth guide wheel are all assembled on the rack, and cooperatively realize reciprocating dragging of the pulling rope with the traction wheel.

4. The on-loom cutting device for use in a velvet loom according to any one of claims 1-2, characterized in that, It also comprises a tensioning unit; the tensioning unit is used to apply tensioning force to the pulling rope, and comprises a tensioning wheel, a wheel seat and a linear drive module; the rack is provided with a strip-shaped guide notch for accommodating the wheel seat and extending along the width direction of the silk weaving machine; the tensioning wheel is assembled on the wheel seat and is wound by the pulling rope; the linear drive module is used to drive the wheel seat to perform sliding movement along the length direction of the strip-shaped guide notch, and is borne by the rack.

5. The on-loom cutting device for use in a velvet loom according to claim 4, characterized in that, The linear drive module comprises a manual screw rod and a screw rod mounting seat; the screw rod mounting seat consistent with the strip-shaped guide notch is fixed on the rack and is arranged outside the strip-shaped guide notch; the manual screw rod is inserted into the screw rod mounting seat; the wheel seat is provided with an internal threaded hole for freely rotating the manual screw rod; when the end of the manual screw rod freely performs circumferential rotation movement due to the action of the torsional moment, the wheel seat performs sliding movement along the strip-shaped guide notch due to the action of the axial force from the manual screw rod.

6. The on-loom cutting device for use in a velvet loom according to any one of claims 1-2, characterized in that, The cutting pile assembly is of a combined structure, which comprises a knife seat and a cutting pile knife; the two ends of the knife seat are respectively used to bind and fix the two free ends of the pulling rope; the cutting pile knife is detachably coupled to realize assembly with the knife seat.

7. The on-loom cutting device for use in a velvet loom according to claim 6, characterized in that, It also comprises a fabric guiding mechanism; the fabric guiding mechanism is arranged downstream of the reed and upstream of the cutting pile assembly, and the woven fabric is always aligned with the cutting pile knife under the assistance of the fabric guiding mechanism.

8. The on-loom cutting device for use in a velvet loom according to claim 7, characterized in that, The fabric guiding mechanism comprises a driving mechanism, an upper cross beam, a lower cross beam, an upper fabric limiting assembly and a lower fabric limiting assembly; the upper cross beam and the lower cross beam are oppositely arranged along the height direction and perform opposite or opposite displacement movement when subjected to the driving force from the driving mechanism; the upper fabric limiting assembly and the lower fabric limiting assembly are respectively borne by the upper cross beam and the lower cross beam, and a through gap is formed therebetween for the free passage of the formed fabric.

9. The on-loom cutting device for use in a velvet loom according to claim 8, characterized in that, The driving mechanism comprises front and rear lead screws, first front and rear nuts, and second front and rear nuts; the front and rear lead screws are vertically arranged and fixed to one side of the frame at a certain distance; the first front nut matched with the front lead screw and the first rear nut matched with the rear lead screw are respectively fixed to the front and rear ends of the upper cross beam by welding; the second front nut matched with the front lead screw and the second rear nut matched with the rear lead screw are respectively fixed to the front and rear ends of the lower cross beam by welding; when the front and rear lead screws are simultaneously driven and synchronously rotate, the upper and lower cross beams perform displacement movement towards or away from each other, and the width d of the through slot is adaptively changed.

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