CN108796789B

CN108796789B - warp and weft shearing and separating device suitable for loom

Info

Publication number: CN108796789B
Application number: CN201810686298.4A
Authority: CN
Inventors: 胡三宝; 聂子睿
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2018-06-28
Filing date: 2018-06-28
Publication date: 2020-01-31
Anticipated expiration: 2038-06-28
Also published as: CN108796789A

Abstract

warp and weft shearing and separating device suitable for looms mainly comprises a power assembly, a transmission assembly, a scissors assembly, a lead guide assembly and a waste yarn collecting assembly, wherein the power assembly, the transmission assembly and the scissors assembly are arranged on a base in a main body shell, the lead guide assembly and the waste yarn collecting assembly are arranged outside the main body shell, the power assembly comprises a power supply, an alternating current-to-direct current transformer, a PWM controller, a motor with a speed reducer, a motor support and an output gear, the transmission assembly comprises a transmission shaft, a transmission shaft support, an eccentric wheel and an input gear, the scissors assembly comprises an upper blade, a lower blade, a reset spring, a clamping spring, a blade shaft and a scissors support.

Description

warp and weft shearing and separating device suitable for loom

Technical Field

The invention belongs to the textile science and technology, and particularly relates to warp and weft shearing and separating devices suitable for a loom.

Background

The weft yarn ends are clamped by four warp yarn leads independently arranged on the side of a loom to provide constant tension, after the weaving is finished, scissors are used for cutting off weft yarns between the leads and the fabric to form yarns formally, cut-off weft yarn broken edges move forwards along with the four warp yarn leads and are wound on and are difficult to separate, and finally the weft yarn broken edges and the warp yarn leads are discarded.

According to statistics, the lead cost consumed by years of normal operation of looms reaches five-six thousand yuan, if the warp leads wound with broken weft yarns and wound around can be recycled, the weaving cost can be effectively reduced, and great economic benefit is generated.

Disclosure of Invention

The technical problem to be solved by the invention is to provide warp and weft shearing and separating devices suitable for a loom, separate weft yarn scrap from warp leads, realize warp lead recovery, complete recycling of waste warp leads, have obvious economic benefits, effectively reduce weaving cost, have reasonable arrangement mode, simple and efficient transmission, convenient manufacturing and processing, adjustable multiple parameters and universality, and can be suitable for different kinds of looms or looms in the same kinds and different working states.

The technical scheme adopted by the invention for solving the technical problems is as follows:

warp and weft cutting and separating device for loom, which comprises power assembly, transmission assembly, scissors assembly, lead guide assembly and main body case, wherein the power assembly, transmission assembly, scissors assembly are mounted on the base inside the main body case, the lead guide assembly and waste yarn collecting assembly are mounted outside the main body case, the lead guide assembly is used for separating and routing the warp leads mixed with broken weft edges;

the power assembly comprises a power supply, an alternating current-to-direct current transformer, a PWM (pulse-width modulation) controller, a motor with a speed reducer, a motor bracket and an output gear, wherein the power supply is sequentially connected with the alternating current-to-direct current transformer, the PWM controller and the motor with the speed reducer through leads;

the transmission assembly comprises two transmission shaft supports, an eccentric wheel and an input gear, the two transmission shaft supports are respectively fixed on the base through bolt connection, holes are formed in the two transmission shaft supports, the transmission shaft is installed between the holes of the two transmission shaft supports, the input gear is fixed on the transmission shaft through bolts, the input gear is meshed with an output gear of the power assembly, and the eccentric wheel is fixed on the transmission shaft;

the scissors assembly comprises an upper blade, a lower blade, a reset spring, clamping springs, blade shafts and scissors supports, the scissors supports are fixed on a base through bolts, the number of the blade shafts is two, the two blade shafts are parallel and fixed on the scissors supports, the lower blade is fixed on the scissors supports through the two blade shafts, the upper blade reciprocates up and down (performs shearing action) around blade shafts, the clamping springs tightly clamp the upper blade and the lower blade at , the end of the reset spring is connected to the scissors supports, the other end of the reset spring is connected to a hole of the upper blade (always gives the closing tendency of downward blades to the upper blade), the tail of the upper blade and an eccentric wheel of a transmission assembly form an eccentric wheel pair, when the large end of the eccentric wheel moves downwards, the tail of the upper blade moves downwards, the upper blade opens, and when the small end of the eccentric wheel moves downwards, the reset spring pulls the upper blade and the lower blade to close (performs reciprocating and continuous shearing action).

According to the scheme, the lead guide assembly comprises a lead driving wheel, a plurality of guide wheels, a tension wheel and a line passing hole, the lead driving wheel is used for driving warp leads to pass through the line, the guide wheels are used for separating the warp leads mixed with broken weft yarns, the broken weft yarns between every two weft yarns can be conveniently cut off by the scissors assembly, the tension wheel is used for enabling the lead driving wheel to provide enough power to drive the warp leads to circulate, and the line passing hole is used for enabling the warp leads after impurity removal to pass through and return to the inlet of the loom (forming circulation application).

According to the scheme, the waste yarn collecting assembly comprises a fan, a blowing hose, an air suction hose and a settling chamber, wherein a blowing port of the fan is connected with a main body shell through the blowing hose, the blowing hose is close to weft yarn broken edges cut off by the scissor assembly, the main body shell is connected with an inlet of the settling chamber through the air suction hose, and an outlet of the settling chamber is connected with an air suction port of the fan.

According to the scheme, the two holes in the transmission shaft support are symmetrically and concentrically arranged (the concentricity of the two holes in the transmission shaft support is ensured).

According to the scheme, the transmission shaft is parallel to the output shaft of the motor with the speed reducer.

According to the scheme, the eccentric wheels are three, included angles among the three eccentric wheels are fixed on the transmission shaft in a staggered mode by 120 degrees (the included angles in the axial direction are staggered by 120 degrees respectively, dynamic balance is guaranteed, vibration and noise of the device are reduced), the corresponding scissors assemblies are arranged in three in parallel (all used for cutting off weft threads), and the tail portion of the upper blade of each scissors assembly and the eccentric wheels of the transmission assemblies form an eccentric wheel pair.

According to the scheme, the settling chamber is cuboid in appearance, and three baffles are welded on the inner wall of the settling chamber main body.

The working principle of the invention is as follows: an output gear of the power assembly transmits rotary motion to drive an input gear of the transmission assembly to drive a transmission shaft to rotate, and the transmission shaft drives an eccentric wheel to rotate around the transmission shaft; the tail part of the upper blade of the eccentric wheel and the tail part of the upper blade of the scissors assembly form an eccentric wheel pair, and when the large end of the eccentric wheel moves downwards, the tail part of the upper blade moves downwards, and the upper blade is opened; when the small end of the eccentric wheel moves downwards, the reset spring pulls the upper blade and the lower blade to close, and the upper blade and the lower blade are circularly reciprocated to continuously carry out shearing action. The lead guide assembly is used for cutting off weft yarn broken edges between every two of the four warp leads by the scissors assembly, the broken edges of the weft yarns are not wound on the warp leads any more but are respectively attached to the four warp leads, the broken edges of the weft yarns are blown away from the leads by turbulent flow blown in by a fan of the waste yarn collecting assembly, and meanwhile, the broken edges of the weft yarns are sucked into a settling chamber by the fan through a hose and are collected after settling.

When the device works, warp leads attached with a large number of broken weft edges are firstly separated through the guide wheels of the lead guide assembly, the scissors assembly continuously works to enable the broken weft edges to be more finely crushed under the action of the power assembly and the transmission assembly, the four warp leads are separated from an initial close state, the distance between the warp leads is increased through the separation guide of the guide wheels at different positions, and preparation is made for realizing concentrated collection of the broken weft edges attached to the warp leads in the step .

To adapt to different looms or different operating conditions of the same loom, the device can adjust a plurality of parameters:

firstly, the wire cutting speed of the scissors assembly is adjusted, a PWM controller is arranged in the power assembly, the speed of the motor can be adjusted by changing the duty ratio of output voltage, and then the speed of the upper blade and the lower blade of the scissors assembly for cutting weft yarn and breaking edges is adjusted, so that the scissors assembly is suitable for different weaving speeds of different looms or the same loom;

then, the speed of the lead driving wheel is adjustable, the weaving speeds of different looms are possibly different, the same loom can also have different working speeds, the speed of the warp lead needs to be matched with the weaving speed direction, and the speed of the warp lead is adjusted by changing the speed of the lead driving wheel so as to adapt to different working conditions;

finally, the negative pressure at the suction port of the suction hose of the waste yarn collecting assembly is adjusted, the negative pressure at the suction port is generated by gas flowing at high speed in the suction hose, namely the gas in the suction hose has high flow rate, the pressure is smaller than the atmospheric pressure outside the suction port, negative pressure is formed at the suction port, weft yarn scrap is sucked into the suction hose, and the gas flowing in the suction hose is driven by a fan, so that the rotating speed of the fan is adjusted by a PWM (pulse width modulation) controller, the adjustment of the flow rate of the gas in the suction hose can be realized, and the adjustment of the negative pressure at the suction port is further realized.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, broken weft yarn edges are separated from the warp leads, so that the warp leads are recovered, the recycling of the waste warp leads is completed, the economic benefit is remarkable, and the weaving cost is effectively reduced; the arrangement mode is reasonable, the transmission is simple and efficient, and the manufacture and the processing are convenient;

2. the device can adjust a plurality of parameters, and the device has universality and can be suitable for different types of looms or looms in the same type and different working states by adjusting the line cutting speed of a scissor assembly, the speed of a lead wire driving wheel and the negative pressure at the suction port of an air suction hose.

Drawings

FIG. 1 is a general layout of a warp and weft shearing and separating device suitable for a loom according to the present invention;

FIG. 2 is a top axial view of a warp and weft shearing and separating device body for a loom according to the present invention;

FIG. 3 is a bottom axial view of the main body of the warp and weft shearing and separating device of the loom of the present invention;

FIG. 4 is a diagram illustrating a lead routing scheme according to an embodiment of the present invention;

FIG. 5 is a schematic view of the transmission assembly of the present invention;

FIG. 6 is a schematic view of a scissors assembly of the present invention;

FIG. 7 is a schematic view of the internal structure of the settling chamber of the present invention;

in the figure: 1-main body shell, 2-weft yarn scrap, 3-lead wire driving wheel, 4-guide wheel, 5-warp yarn lead wire, 6-pinch roller, 7-suction hose, 8-settling chamber, 9-fan, 10-blowing hose, 11-power plug, 12-lead wire, 13-speed reducing motor, 14-motor support, 15-output gear, 16-output gear, 17-transmission shaft support, 18-base, 19-eccentric wheel, 20-transmission shaft, 21-scissors assembly, 22-wire passing hole, 23-blade shaft, 24-clamping spring, 25-upper blade, 26-lower blade, 27-reset spring and 28-scissors support.

Detailed Description

The invention is further described in with reference to the following figures and examples.

As shown in figures 1 and 2, warp and weft cutting and separating device suitable for a loom mainly comprises a power assembly, a transmission assembly, a scissors assembly, a lead guide assembly, a waste yarn collecting assembly and accessories thereof, and the internal structure of a main body shell 1 is shown in figures 2 and 3.

The power assembly is installed and structured as shown in fig. 2, the power assembly comprises a power supply, a lead 12, an ac-to-dc converter, a PWM controller, a motor 13 with a reducer (a dc motor), a motor bracket 14 and an output gear 15, the motor 13 with the reducer and the motor bracket 14 are fixedly connected by bolts, 4 holes are opened below the motor bracket 14, the motor bracket 14 is fixedly connected with a base 18 by bolts, the output gear 15 is fixedly connected with a motor output shaft by a set screw, when the power assembly works, a power plug 11 is inserted into a socket of the power supply (household 220V ac power), household 220V ac power is converted into dc power required by the motor through a power plug, the lead and the ac-to-dc converter, voltage is converted into dc voltage through the ac-to-dc converter, the motor driving the reducer rotates, and then the PWM controller controls the duty ratio of input voltage, and then the output power of the motor 13 with the speed reducer is adjusted, and then the rotating speed of the motor 13 with the speed reducer is adjusted according to the actual condition of the textile equipment. The motor without the reducer has high rotating speed and small torque, and is not suitable for the actual working condition of the device, so the reducer needs to be additionally arranged on the motor to play the roles of reducing speed and increasing torque so as to adapt to the working state of the device with larger working load and slower rotating speed. The power is transmitted to the transmission assembly through the gear pair. The motor 13 with the speed reducer outputs proper torque and rotating speed through the speed reducer reducing and moment increasing effects, and the proper torque and rotating speed are converted into the rotating motion of the output gear 15. The start and stop of the motor are controlled by the switch, and the PWM controller (speed regulator) is used for correspondingly adjusting the speed of the motor according to the working speed of the loom.

The transmission assembly is mounted and structured as shown in fig. 2 and 5, and includes a transmission shaft 20, a transmission shaft bracket 17, an eccentric wheel 19, and an input gear 16. Two transmission shaft brackets 17 are respectively fixed on the base 18 through two bolts, two ends of a transmission shaft 20 are arranged in two symmetrical holes of the transmission shaft brackets 17, an input gear 16 is fixed on the transmission shaft 20 through the bolts, the input gear 16 is meshed with an output gear 15, and three eccentric wheels 19 are fixed on corresponding positions of the transmission shaft 20 through positioning screws. During installation, the concentricity of the two holes on the transmission shaft support 17 needs to be ensured simultaneously to reduce the rotating friction torque of the transmission shaft 20 after the transmission shaft is installed in the two holes of the two transmission shaft supports 17, and in addition, the transmission shaft 20 is ensured to be parallel to the output shaft of the motor 13 with the speed reducer, so that the stable transmission of power is ensured. The three eccentric wheels 19 are fixed on the transmission shaft 20 through positioning screws, and are respectively arranged above the tail parts of the blades 25 of the three scissors. In addition, the included angles between the 3 eccentric wheels 19 are staggered by 120 degrees respectively in consideration of the dynamic balance factor, so that the vibration is reduced, and the running smoothness of the equipment is improved. The output gear 15 of the power assembly transmits the rotation motion to drive the input gear 16 to drive the transmission shaft 20 to rotate, and the transmission shaft 20 drives the eccentric wheel 19 to rotate around the transmission shaft 20, so that the motion is transmitted to the scissors assembly 21.

The arrangement of the scissors assembly 21 is as shown in fig. 2, 3 and 6, the structure of the scissors assembly is as shown in fig. 6, the scissors assembly is composed of an upper blade 25, a lower blade 26, a return spring 27, a clamping spring 24, a blade shaft 23, a scissors bracket 28 and the like, the scissors bracket 28 is fixed on the base 18 through two holes at the bottom of the scissors bracket 28 by bolts, the blade shaft 23 is fixed on the scissors bracket 28, the lower blade 26 is fixed on the scissors bracket 28 through two blade shafts 23, the upper blade 25 reciprocates up and down around blade shafts 23, the clamping spring 24 tightly clamps the upper blade 25 and the lower blade 26 on the base 18 to ensure good shearing effect, the end of the return spring is connected on the scissors bracket 28, the other end is connected in a hole of the upper blade 25 to always give the closing tendency of the upper blade 25 to the lower blade 26, the eccentric wheel 19 and the tail of the upper blade 25 form an eccentric wheel pair, when the large end of the upper blade 19 moves downwards, the tail of the upper blade 25 moves downwards, the eccentric wheel pair continuously pulls the upper blade 21 and the eccentric wheel continues to move, and the eccentric wheel 27 continuously moves downwards, and the eccentric wheel continues to move.

The guide wheel 4 is provided with a bearing and a bolt, and can be fixed at a corresponding position through the bolt and can freely rotate, the speed of the lead driving wheel 3 is adjusted according to different working conditions of different textile equipment or the same equipment, so that the advancing speed of the warp leads 5 is matched with the weaving speed, the guide wheel 4 separates and routes four warp leads 5 which are mixed with a large number of weft broken edges 2 according to the mode of figures 1 and 3, a scissor assembly 21 is convenient to cut off the weft broken edges 2 between every two warp leads 5, the four warp leads 5 after impurity removal are returned to the inlet of a loom after passing through the wire passing hole 22 to form the circulating application of the leads, the tension wheel 6 is fixed, the other end is close to the warp leads 5, the spring force is adjusted according to the actual routing, the warp leads 5, the guide wheel 4 and the lead driving wheel 3 have proper pressure, so that the lead 3 can provide enough power to drive the warp leads 5 to be positioned on the tensioning wheel 3 according to the routing mode of figures 1 and 3, and the scissor shaft driving mechanism is greatly simplified in the mode of figure 19.

The waste yarn collecting assembly is shown in figure 1 and comprises a fan 9, a blowing hose 10, a suction hose 7, a main body shell 1, a settling chamber 8 and the like. The broken weft yarn 2 is filled in the factory and is not beneficial to the health of workers and the safety of the factory, so a waste yarn collecting assembly is added, and when the broken weft yarn 2 between every two of the four warp leads 5 is cut off by the scissors assembly 21, each broken weft yarn 2 is not tightly wound on the warp, but is respectively attached to the four warp leads 5. The fan 9 blows in turbulent flow through the air blowing hose 10 to blow the broken weft yarn 2 away from the warp leads 5, meanwhile, the broken weft yarn 2 is sucked into the settling chamber 8 through the air suction hose 7 by the fan 9, and is collected after settling for periodic treatment.

The internal structure of the settling chamber 8 is shown in fig. 7, the appearance of the settling chamber 8 is cuboids with large enough volume, after the high-speed flowing gas with the weft yarn broken edge 2 in the suction hose 7 enters the settling chamber 8, the flowing cross-sectional area is increased, the flow speed of the gas is reduced as known by Bernoulli principle, the gas flow is not enough to drive the weft yarn broken edge 2 to continue moving, and then the weft yarn broken edge 2 is settled under the action of gravity, three baffles are welded on the inner wall of the main body of the settling chamber 8, the purpose is to disturb the flowing direction of the gas flow with the weft yarn broken edge 2, and the moving path of the gas flow in the settling chamber 8 is increased, so that the weft yarn broken edge 2 has enough time to settle.

The above description is a preferred embodiment of the present invention, but the present invention should not be limited to the disclosure of the embodiment and the drawings. Therefore, it is intended that all equivalents and modifications which do not depart from the spirit of the invention disclosed herein are deemed to be within the scope of the invention.

Claims

The warp and weft cutting and separating device suitable for the loom of 1, kinds includes power assembly, transmission assembly, scissors assembly, lead wire direction assembly and main body cover at least, and power assembly, transmission assembly, scissors assembly are installed on the base in the main body cover, and lead wire direction assembly, waste yarn collection assembly are installed outside the main body cover, and lead wire direction assembly is used for will being mingled with the warp lead wire of weft broken edge separately and walk the line, its characterized in that:

the power assembly comprises a power supply, an alternating current-to-direct current transformer, a PWM (pulse-width modulation) controller, a motor with a speed reducer, a motor bracket and an output gear, wherein the power supply is sequentially connected with the alternating current-to-direct current transformer, the PWM controller and the motor with the speed reducer through leads;

the transmission assembly comprises two transmission shaft supports, an eccentric wheel and an input gear, the two transmission shaft supports are respectively fixed on the base through bolt connection, holes are formed in the two transmission shaft supports, the transmission shaft is installed between the holes of the two transmission shaft supports, the input gear is fixed on the transmission shaft through bolts, the input gear is meshed with an output gear of the power assembly, and the eccentric wheel is fixed on the transmission shaft;

the scissors assembly comprises an upper blade, a lower blade, a reset spring, clamping springs, blade shafts and scissors supports, the scissors supports are fixed on a base through bolts, the number of the blade shafts is two, the two blade shafts are parallel and fixed on the scissors supports, the lower blade is fixed on the scissors supports through the two blade shafts, the upper blade reciprocates up and down around blade shafts, the clamping springs tightly clamp the upper blade and the lower blade at , one end of the reset spring is connected to the scissors supports, the other end of the reset spring is connected to a hole of the upper blade, the tail of the upper blade and an eccentric wheel of a transmission assembly form an eccentric wheel pair, when the large end of the eccentric wheel moves downwards, the tail of the upper blade moves downwards, the upper blade opens, and when the small end of the eccentric wheel moves downwards, the reset spring pulls the upper blade and the lower blade to close.
2. The warp and weft cutting and separating device suitable for the loom as claimed in claim 1, wherein the lead guide assembly comprises a lead driving wheel, a plurality of guide wheels, a tension wheel and a thread through hole, the lead driving wheel is used for driving the warp lead to run, the guide wheels are used for separating the warp leads with weft yarn broken edges, the scissors assembly is convenient to cut the weft yarn broken edges between every two weft yarns, the tension wheel is used for enabling the lead driving wheel to provide enough power to drive the warp leads to circulate, and the thread through hole is used for enabling the warp leads after impurity removal to pass through and return to the entrance of the loom.
3. The weft and warp shearing and separating device suitable for the loom as claimed in claim 1, wherein the waste yarn collecting assembly comprises a fan, an air blowing hose, an air suction hose and a settling chamber, an air blowing port of the fan is connected with a main body shell through the air blowing hose, the air blowing hose is close to the broken edges of weft yarns after the scissors assembly is cut off, the main body shell is connected with an inlet of the settling chamber through the air suction hose, and an outlet of the settling chamber is connected with an air suction port of the fan.
4. The warp and weft cutting and separating device for loom of claim 1, wherein the two holes on the driving shaft support are symmetrically and concentrically arranged.
5. The warp and weft shearing and separating device suitable for the loom of claim 1 is characterized in that the transmission shaft is parallel to an output shaft of a motor with a speed reducer.
6. The warp and weft shearing and separating device suitable for the loom as claimed in claim 1, wherein the number of the eccentric wheels is three, the included angles between the three eccentric wheels are fixed on the transmission shaft in a staggered manner of 120 degrees, the number of the corresponding scissors assemblies is three, and the tail part of the upper blade of each scissors assembly and the eccentric wheel of the transmission assembly form an eccentric wheel pair.
7. The warp and weft shearing and separating device suitable for looms as recited in claim 3, wherein the settling chamber is cuboid in appearance, and three baffles are welded on the inner wall of the settling chamber main body.