CN113911799A

CN113911799A - Cloth centering mechanism

Info

Publication number: CN113911799A
Application number: CN202111151111.9A
Authority: CN
Inventors: 李家品
Original assignee: Zhejiang Aizhi Intelligent Equipment Co ltd
Current assignee: Zhejiang Aizhi Intelligent Equipment Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-01-11

Abstract

The cloth centering mechanism comprises a driving shaft, and flanges are arranged at fixed positions at two ends close to the driving shaft; the two flanges are provided with a plurality of wheel shafts to form a wheel shaft group which is in close friction with the cloth; a guide shaft support is arranged at the contact part of the two ends of each wheel moving shaft and the flange, a bull eye bearing is arranged at the end part of each wheel moving shaft, a control mechanism is in contact with the bull eye bearing, and the contact position of the control mechanism and the bull eye bearing is adjusted to realize the pushing of the bull eye bearing; and a spring with one end abutting against the flange and the other end abutting against the axle step of the wheel-driven shaft is arranged at the end part of each wheel-driven shaft at the other side. The servo motor drives the surface of the control mechanism to push the eyelet bearing, so that the axial displacement of the wheel moving shaft is dynamically changed, the direction of friction force close to the cloth is continuously changed by the wheel moving shaft, and the cloth is centered; in addition, the rotation degree of the servo motor is variable, so that the cloth adjusting amplitude is variable, the centering speed is high, the stability is good, the process is mild, the mechanism impact is not caused, and the severe vibration of the equipment is avoided.

Description

Cloth centering mechanism

Technical Field

The invention relates to an assembly in a structure of a cloth processing machine, in particular to a cloth centering mechanism.

Background

The cloth centering mechanism can be used by the existing cutting machine, printing and dyeing machine, rolling machine and bidirectional hemming machine, and the centering mechanism is used for preventing the cloth from moving towards other directions when the roller set is wound, namely, the cloth deviates on the roller set, if the cloth deviates.

The above-mentioned devices are affected greatly, for example, the cutting machine may cut the product with oblique weft, the printing device may have irregular patterns, etc.

Present centering mechanism is mostly using cylinder or hydro-cylinder as power, and the lower and adjacent cloth of cloth is arranged respectively to the less movable roll of two diameters, and cylinder or hydro-cylinder promote roller set longitudinal movement, and self and cloth's frictional force is vertically promoted cloth when the roller set removes, adjusts the position of cloth on the roller set through such mode to guarantee cloth between two parties.

But the existing centering mechanism still has defects due to the structure reason:

1. the centering mechanism is adjusted by stretching and retracting of the air cylinder, and the adjustment amplitude is not controllable;

2. the traditional centering mechanism pushes cloth through friction force with the traditional centering mechanism, so that the longitudinal movement of the traditional centering mechanism is unstable, for example, when a cylinder pushes a roller set to reach the limit, the cloth still deviates from the center, a sensor signal still sends a push-out instruction to the cylinder, and the cloth side cannot be effectively centered with the roller set;

3. the traditional centering control mode has the advantages that the balance effect is not ideal, the cylinder is always in the working state and the non-working state, the switching frequency is high, and the cylinder has strong impact on equipment.

Disclosure of Invention

The invention provides the cloth centering mechanism with controllable adjustment range, good stability and ideal centering control effect, aiming at solving the technical problems of poor adjustability, instability and the like caused by unreasonable structure of the existing centering mechanism.

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

cloth centering mechanism, its characterized in that: the device comprises a driving shaft, two ends of which are fixed on a bracket through bearings, and flanges are arranged at fixed positions close to the two ends of the driving shaft;

the two flanges are provided with a plurality of rotating shafts which are arranged around the driving shaft by respectively penetrating through the two flanges, and the rotating shafts form a rotating shaft group which is in close friction with the cloth;

the contact part of the two ends of each wheel moving shaft and the flange is provided with a guide shaft support, the end part of each wheel moving shaft positioned on the same side of the wheel moving shaft group is provided with a bull eye bearing, a control mechanism which is arranged on the side and is powered by a servo motor is contacted with the bull eye bearing, and the control mechanism adjusts the contact position with the bull eye bearing to realize the pushing of the bull eye bearing; the end part of each wheel-driven shaft positioned at the other side of the wheel-driven shaft group is provided with a spring which is sleeved on the wheel-driven shaft, one end of the spring is propped against the flange, and the other end of the spring is propped against the axle step of the wheel-driven shaft.

Preferably, control mechanism includes the control panel of a side surface and bull's eye bearing contact, a semicircular gear is connected to control panel opposite side surface, and semicircular gear and the transmission of servo motor output shaft meshing inlay gear bearing on the semicircular gear, gear bearing axle center is fixed on the stand on a control panel upper bracket, the tray is fixed with the support on the control panel.

Preferably, the control panel connected with one side of the semicircular gear is further provided with a fixing accessory, a bracket thrust bearing is embedded in the fixing accessory, the axis of the bracket thrust bearing is fixed with the upright post of the lower bracket of the control panel, and the lower bracket of the control panel is fixed with the support

Preferably, the servo motor is linked with the semicircular gear through a pinion.

Preferably, an edge detecting sensor is arranged at the cloth output end on one side of the centering mechanism, and transmits a feedback signal to the servo motor to realize that the control mechanism pushes the bullseye bearing.

Preferably, an analog quantity grating sensor is arranged at the cloth output end on one side of the centering mechanism, and the analog quantity grating sensor and the servo motor form a PID (proportion integration differentiation) to realize that the control mechanism stably pushes the bullseye bearing.

Preferably, the control mechanism comprises a control panel, one side surface of the control panel is in contact with the bull eye bearing, and the other side surface of the control panel is respectively connected with a rack and hinged with a fixed accessory; the rack is directly or indirectly driven with the output shaft of the servo motor, and one end of the fixed accessory is hinged on the bracket and supports the control disc; the rack is embedded with a roller which is limited in a wheel track fixed on the bracket.

The invention has the following beneficial effects:

compared with the prior art, the invention drives the control mechanism surface to push the bull-eye bearing through the servo motor so as to dynamically change the axial displacement of the wheel moving shaft rotating along with the driving shaft, thereby continuously replacing the direction of the friction force close to the cloth by the wheel moving shaft, centering the cloth, and replacing the direction of the limited width of the wheel moving shaft to achieve the infinite axial displacement adjustment of the cloth; in addition, the rotation degree of the servo motor is variable, so that the cloth adjusting amplitude is variable, the plurality of wheel shafts rotate along with the driving shaft to continuously wheel so that the centering speed is high, the stability is good, the process is mild, the mechanism impact is not caused, and the severe vibration of equipment is avoided.

Description of the drawings:

FIG. 1 is a view of an embodiment of the centering mechanism of the present invention applied to an apparatus;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a schematic view of the centering mechanism of the present invention;

FIG. 5 is a schematic cross-sectional view of FIG. 4;

FIG. 6 is a side view of the centering mechanism of the present invention;

FIG. 7 is a schematic view of a portion of the control mechanism of the centering mechanism of the present invention;

FIG. 8 is a schematic cross-sectional view of the alternate view of FIG. 7;

FIG. 9 is a schematic structural view of the centering mechanism of the present invention shown from the outside of the flange with the axle shaft rotating;

the specific implementation mode is as follows:

the invention is explained in further detail below with reference to the drawings.

The cloth centering mechanism is commonly used in cutting machines, printing and dyeing machines, rolling machines and two-way hemming machines, and the centering mechanism is used for preventing the cloth from moving towards one direction when the roller set winds and runs, and aims to achieve the purpose.

Referring to fig. 2, 4 to 9, the cloth centering mechanism of the present invention includes a driving shaft 23 having two ends fixed to

brackets

24 and 25 through bearings, and

flanges

29 and 30 are provided at fixed positions near the two ends of the driving shaft 23 to ensure that the

flanges

29 and 30 rotate synchronously when the driving shaft 23 rotates; the driving shaft 23 is provided with a rotating power by a power mechanism.

With reference to fig. 2, in fig. 9, the

flanges

29 and 30 are provided with a plurality of rotating shafts (a to H) which are respectively arranged around the driving shaft 23 through the two flanges, and the rotating shafts (a to H) form a rotating shaft group which is in close friction with the cloth 5, wherein the shaft array is performed with the axis of the driving shaft 23 as a reference, and the two ends of the array unit are provided with the rotating shafts (a to H).

Guide shaft supports A3 and A4 are respectively arranged at the contact positions of the two ends of each rotating shaft (A to H) and the

flanges

29 and 30, namely, the guide shaft supports A3 and A4 are respectively arranged on the

flanges

29 and 30 corresponding to the number of the rotating shafts, and when the two ends of each rotating shaft penetrate through the

flanges

29 and 30, the corresponding guide shaft supports A3 and A4 are arranged on the

flanges

29 and 30. Both ends of each rotating shaft respectively pass through a corresponding guide shaft support A3, A4 and can move in and out of the guide shaft supports A3, A4 in the longitudinal direction, namely, each rotating shaft (A to H) can flexibly move on the corresponding guide shaft supports A3, A4 in the longitudinal direction.

A bull eye bearing A2 is arranged at the end part of each wheel shaft (A to H) positioned on the same side of the wheel shaft group, and the surface of a control mechanism which is arranged on the side and is powered by the servo motor 21 is in contact with the bull eye bearing A2 and provides driving force for the bull eye bearing A2; the end of each of the turning shafts (a to H) on the other side of the turning shaft group is provided with a spring a1 which is sleeved on the turning shaft and one end of which abuts against the flange 30 and the other end of which abuts against the step surface of the turning shaft (a to H), namely, each turning shaft corresponds to a spring a 1. The spring A1 provides the shrink extrusion of the spring A1 for the wheel axle (A to H) because the control mechanism pushes the bull eye bearing A2 to longitudinally displace, and the spring A1 urges the longitudinally moving wheel axle to move and reset towards the bull eye bearing A2 after the control mechanism removes the force.

The implementation principle of the embodiment is as follows:

with reference to fig. 1 to 3, the centering mechanism is applied to a corresponding apparatus consisting of a guide roll 1, the centering mechanism 2, a guide roll 3 and an apparatus frame 6.

The guide roll 1, the centering mechanism 2 and the guide roll 3 are arranged on the equipment frame 6; the horizontal cloth 5 is turned to the centering unit 2 through the guide roll 1, passes around the guide roll 3 after centering, and then is horizontally output.

The cloth 5 is wrapped on the centering unit 2 by winding around the guide rolls 1 and 3 at an included angle so that the cloth 5 is sufficiently contacted with each of the moving axes (a to H, which mainly contact the cloth 5) to form a frictional force, that is, the longitudinal movement of the moving axes determines the adjustment direction of the cloth 5. In the process, the plurality of rotating shafts are in wheel-to-wheel contact with the cloth 5, so that the friction force borne by the cloth 5 during adjustment cannot be continuously increased, but the friction direction can be continuously realized. In addition, the rotating shaft rotates along with the driving shaft 23, so that the contact adjustment centering of the cloth becomes soft and smooth, the fiber tissue of the cloth 5 is protected from being damaged, the limited width of the rotating shaft can achieve infinite longitudinal adjustment range of the contact cloth through rolling replacement, and the control mechanism pushes the bull eye bearing A2 and the spring A1 to achieve dynamic control of the centering adjustment range of the cloth.

In the centering mechanism 2, when the cloth 5 is tightly contacted with a plurality of rolling shafts in the rolling shafts (A to H) forming the rolling shaft group in the centering mechanism 2 at the clamping lower surface of the guide wheel 1 and the guide roller 3, if deviation occurs, a worker pushes the surface contacted with the bull eye bearing A2 to displace through the control mechanism, rolling friction is formed due to the contact of the bull eye bearing A2 and the surface of the control mechanism, so the control mechanism does not generate impact force on the rolling shafts (A to H) when being pushed, and the surface is smooth when being pushed.

With continued reference to fig. 2 and 4, and fig. 9, when the centering mechanism 2 is in the initial state, the spring a1 on each axle on one side of the flange 30 is in a partially compressed state (e.g., axle C in fig. 4). When the surface of the cloth 5 is in contact with the middle section of the wheel moving shaft group (usually, the wheel moving shaft B, C, D, if the guide wheel is adjusted too low, the cloth can also be in contact with the wheel moving shaft A, E), the cloth 5 is moved to the flange 30 direction in the following process, at this time, the bull's eye bearing A2 part at the end of the wheel moving shaft corresponding to the surface (such as the wheel moving shaft B, C, D in fig. 2 and 9) of the wheel moving shaft group in contact with the cloth 5 is adjusted by the control mechanism to advance or tilt forward in the flange 30 direction, taking the shaft C, G as a boundary, the wheel moving shaft B, A, H at one side is moved to the flange 30 direction, the control mechanism surface in contact with the bull's eye bearing A2 at the end of the wheel moving shaft D, E, F at the other side of the shaft C, G is retreated or tilted to the flange 29 direction, the spring A1 at the other end of the wheel moving shaft D, E, F is arranged to be overhead, so that the wheel moving shaft D, the guide wheel moving shaft D is adjusted too low, and the cloth can be in contact with the middle section of the flange 30, and the bull's eye bearing A B, C, D is adjusted too low, and the control mechanism is adjusted to be too low, and the flange 30 is adjusted to be, E. F in the direction of the outer side of the flange 29, so that the surface of the cloth 5 generates a friction force in the direction of the flange 29 during the reciprocating rotational alternation.

In the process, because the wheel-moving shaft group rotates along with the driving shaft 23, the angle of surface adjustment of the control mechanism is not changed, so that each wheel-moving shaft can be changed by replacing the previous wheel-moving shaft, and continuously replaced friction force and friction force direction are generated on the surface of the cloth 5, thereby achieving the aim of driving the cloth 5 to be centered.

With reference to fig. 2 and 4, in the prior art, if a manual control mechanism is not used, a sensor may be additionally installed on the way of the output of the cloth 5 between the centering mechanism 2 and the guide roll 3, and the sensor is connected to the servo motor and transmits an electric signal to the servo motor to control the rotation speed and the rotation direction of the servo motor.

If the sensor can not directly transmit signals to the servo motor and also drive the motor, an intermediate device, such as a PLC or a single chip microcomputer, is usually required to be installed for converting the electric signals of the sensor.

With continuing reference to fig. 4-6, as a further improvement to the present invention, the control mechanism includes a control disc 22 having one side surface contacting the bull's eye bearing a2, the other side surface of the control disc 22 being connected to a semicircular gear 28; the semicircular gear 28 is in meshing transmission with an output shaft of the servo motor 21, a gear supporting bearing 311 is embedded on the semicircular gear 28, the axis of the gear supporting bearing 311 is fixed on an upright post on a control panel upper bracket 31, and the control panel upper bracket 31 is fixed with the support 25.

In this embodiment, the surface of the control board 22 is set to be a plane, and the rotation shafts (a to H) move longitudinally along the circular motion of the driving shaft 23 with the change of the angle of the control board 22 when the control board 22 contacts the bull's eye bearing a2, so as to achieve the purpose of controlling the centering of the cloth 5.

In addition, in the implementation, the servo motor 21 is fixed to the control panel upper tray 31 through a flange at the end of the motor. The middle of the control disc 22 is provided with a hole for the driving shaft 23 to pass through, and the hole is arranged in a standard way when the output shaft of the servo motor 21 drives the semicircular gear 28 to rotate, the rotation angle of the control disc 22 enables the hole not to be contacted or not to influence the surface of the driving shaft 23 when the hole deflects.

In other embodiments, the gear support bearing 311 may be arranged as follows according to the principle that the semicircular gear 28 is fixedly connected to the control panel upper bracket 31 and the semicircular gear 28 is ensured to rotate:

in order to ensure that the semicircular gear 28 can rotate around the axis of the gear, a through hole can be arranged on the axis of the semicircular gear 28, the upright post extends inwards from the upper bracket 31 of the control panel, the semicircular gear 28 is sleeved on the upright post and is fixed above the upright post by a nut, so that the axis of the semicircular gear 28 is prevented from being separated, and the limiting effect is achieved. Or two arc grooves which are concentric with the gear and are positioned on the left and the right are arranged on the semicircular gear 28, and then a small bearing fixed on a bracket 31 on the control panel is arranged in the arc grooves.

With continuing reference to fig. 4 and 6, as a further improvement of the present invention, a fixing accessory 33 is further disposed on the control panel 22 on the side connected with the semicircular gear 28, a bracket thrust bearing 321 is embedded on the fixing accessory 33, the axis of the bracket thrust bearing 321 is fixed to the upright of the control panel lower bracket 32, and the control panel lower bracket 32 is fixed to the support 25.

In this embodiment, the bracket thrust bearing 321 and the gear support bearing 311 of the fixed accessory 33 are vertically concentric, so that the control disc 22 can be ensured to rotate around the bracket thrust bearing 321 and the gear support bearing 311 synchronously in the vertical direction.

In addition, the carrier thrust bearing 321 and the gear support bearing 311 may be not concentric in the vertical direction, but it is required that the projection on the horizontal plane is aligned so that the angle formed by the rotation of the semicircular gear 28 is the same as the angle formed by the rotation of the fixed attachment 33.

With continued reference to fig. 6, as a further improvement of the present invention, the servo motor 21 and the semicircular gear 28 are linked by a pinion 34

In the present embodiment, the transmission ratio of the pinion 34 to the semicircular gear 28 is 1 to 4, so that the servo motor only needs to provide a small torque to control the control panel 22; the servo motor 21 rotates a certain angle to rotate the control panel to a required control angle.

With continuing reference to fig. 2 and 4, as an improvement of the present invention, an edge-detecting sensor 4 is disposed at an output end of the cloth at one side of the centering mechanism, and the edge-detecting sensor 4 transmits a feedback signal to the servo motor to realize that the control mechanism pushes the bull's eye bearing a 2.

In this embodiment, the angle control of the rotation of the servo motor can be realized by directly transmitting the signal measured by the edge-detecting sensor 4 to the servo motor without decoding or conversion. This allows for automated operation of the centering mechanism.

Further, as an improvement of the invention, an analog quantity grating sensor is arranged at the cloth output end on one side of the centering mechanism, and the analog quantity grating sensor and the servo motor 21 form a PID (proportion integration differentiation) to realize that the control mechanism stably pushes the bullseye bearing A2.

Further, as a modification of the present invention, the control mechanism includes a control plate 22 having one side surface contacting with the bull's eye bearing a2, and the other side surface of the control plate 22 is respectively connected with a rack (not shown) and hinged with a fixed attachment 33; a rack (not shown) is directly or indirectly driven with an output shaft of the servo motor 21, one end of a fixed accessory 33 is hinged on the bracket 25 and supports the control disc 22; the rack (not shown) is embedded with a roller (not shown), and the roller (not shown) is limited in a wheel track fixed on the bracket 25.

In this embodiment, the servo motor directly drives the rack (not shown) to move the control panel 22 back and forth, so as to displace the axle of the bull eye bearing a2 in contact with the control panel 2 in the longitudinal direction, thereby centering the cloth.

Claims

1. Cloth centering mechanism, its characterized in that: the device comprises a driving shaft, two ends of which are fixed on a bracket through bearings, and flanges are arranged at fixed positions close to the two ends of the driving shaft;

2. The cloth centering mechanism of claim 1, wherein: control mechanism includes the control panel of a side surface and bull's eye bearing contact, a semicircular gear is connected on control panel opposite side surface, and semicircular gear and servo motor output shaft meshing transmission inlay gear bearing on the semicircular gear, and gear bearing axle center is fixed on the stand on a control panel upper bracket, the tray is fixed with the support on the control panel.

3. The cloth centering mechanism of claim 2, wherein: the control panel that is connected with semicircle gear one side still is equipped with fixed annex, inlay bracket thrust bearing on the fixed annex, this bracket thrust bearing's axle center is fixed with the stand of control panel bottom bracket, and control panel bottom bracket is fixed with the support.

4. The cloth centering mechanism of claim 2, wherein: the servo motor is linked with the semicircular gear through a pinion.

5. The cloth centering mechanism of claim 1, wherein: and an edge detection sensor is arranged at the cloth output end on one side of the centering mechanism and transmits a feedback signal to the servo motor so as to realize that the control mechanism pushes the bull's eye bearing.

6. The cloth centering mechanism of claim 1, wherein: an analog quantity grating sensor is arranged at the cloth output end on one side of the centering mechanism, and the analog quantity grating sensor and the servo motor form a PID (proportion integration differentiation) to realize that the control mechanism stably pushes the bull eye bearing.

7. The cloth centering mechanism of claim 1, wherein: the control mechanism comprises a control panel, one side surface of the control panel is in contact with the bull eye bearing, and the other side surface of the control panel is respectively connected with a rack and hinged with a fixed accessory; the rack is directly or indirectly driven with the output shaft of the servo motor, and one end of the fixed accessory is hinged on the bracket and supports the control disc; the rack is embedded with a roller which is limited in a wheel track fixed on the bracket.