CN210594688U

CN210594688U - Driving belt cord winding tension control device

Info

Publication number: CN210594688U
Application number: CN201920882252.XU
Authority: CN
Inventors: 时宁宁; 闫军; 周建; 汪明刚
Original assignee: Gates Unitta Power Transmission (suzhou) Ltd
Current assignee: Gates Unitta Power Transmission (suzhou) Ltd
Priority date: 2019-06-08
Filing date: 2019-06-08
Publication date: 2020-05-22
Anticipated expiration: 2029-06-08

Abstract

The utility model provides a novel drive belt cotton rope winding tension controlgear, this equipment include guide wheel, hysteresis lag stopper, PLC controller, tension sensor, contact wheel and shaping hub, and the hysteresis lag stopper passes through the PLC controller with tension sensor and is connected, detects and controls to rope tension, and this equipment makes the tension of elasticity cotton rope be in lower and stable state, has improved the stability of drive belt frequency.

Description

Driving belt cord winding tension control device

Technical Field

The utility model relates to a drive belt production technical field especially relates to drive belt cotton rope winding tension controlgear.

Background

Belts typically include cords that provide tension. At present, in the traditional production process of the elastic transmission belt, an elastic thread rope winding process adopts a free shaft, namely, tension-free control winding. The spool is freely placed on the ground or on the support, and the cotton rope directly twines on the shaping hub through a plurality of leading wheels, and winding tension is uncontrolled in the production process. The final tension at which the cord is wound onto the forming hub depends on the condition of the spool itself and the friction generated during the winding of the cord around the guide wheel. As shown in fig. 3, two cords are wound simultaneously without tension control, and two curves are schematic diagrams of the amount of tension fluctuation of the two corresponding cords. The winding mode of tension-free control can cause the tension of the thread rope to be in a continuously reduced state from the beginning to the end of winding, and simultaneously, the tension difference between the two thread ropes is large due to different thread spool states, different friction forces and the like. Unstable tension may cause instability of the circumference of the rubber sleeve after shrinkage, so that the rubber sleeve cannot be well attached to a vulcanization mold, and the rubber sleeve is scrapped in a vulcanization process. Meanwhile, the frequency of the transmission belt after vulcanization molding has certain fluctuation due to the influence of the tension difference of the wire ropes, so that the frequency value concentration of the transmission belt in the same batch is not high.

Other types of cords, such as polyester cords, glass cords, and the like, are commonly used to control winding tension using a let-off feed mechanism that applies a relatively high tension to the cord relative to an elastic cord due to the limitations of the mechanism. The elastic thread rope is mostly made of elastic materials, if high tension is applied, the thread rope is greatly stretched in the winding process, after the rubber sleeve is finished, the thread rope can shrink to the unstretched initial state due to the fact that the rubber sleeve has no internal support, and the rubber sleeve shrinks seriously. Meanwhile, if the shrinkage of the cord is too large, the shrinkage is greatly different from that of the rubber material, so that the rubber sleeve is layered and twisted, and the like, and the let-off mechanism is not suitable for elastic cords.

It is highly desirable to provide a tension control apparatus for an elastic cord that maintains winding tension in a low tension state.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel drive belt cotton rope winding equipment, this equipment can guarantee that the cotton rope keeps lower and stable tension in winding process.

This equipment includes guide wheel, hysteresis lag stopper, PLC controller, tension sensor, contact wheel and shaping hub, and the cotton rope passes through guide wheel, hysteresis lag stopper, tension sensor in proper order, on the final winding of contact wheel arrives the shaping hub, and the hysteresis lag stopper passes through the PLC controller with tension sensor and is connected.

The PLC controller comprises PLC hardware and a PID functional block.

The equipment also comprises a bracket, and the hysteresis brake, the tension sensor and the contact wheel are fixedly arranged on the bracket.

The equipment also comprises a sliding rail, and the support is fixed on the sliding rail and moves left and right along the sliding rail.

The slide rail is arranged parallel to the forming hub.

The tension on the wire rope output by the tension sensor end is 0N to 10N.

Preferably, the tension on the wire rope output by the tension sensor end is 2N.

The thread rope is an elastic thread rope.

The elastic thread rope is a nylon thread rope.

The utility model discloses because the end has increased hysteresis lag stopper and tension sensor at the online rope, the winding in-process is because tension sensor detects the line that does not stop, through the PLC controller conversion, calculate and export certain current analog quantity for the hysteresis lag stopper, the hysteresis lag stopper is according to the big or small adjustment magnetic hysteresis power of analog quantity, produce certain damping to the line, the tension that keeps the cotton rope is in stable state, simultaneously because the hysteresis lag stopper sets up at the online rope end, tension loss is less, can guarantee the low tension state of cotton rope, the shrinkage factor of gum cover and the stability of drive belt frequency have been guaranteed to this tension control equipment.

Drawings

Fig. 1 is a schematic view of the cord winding apparatus of the present invention.

Fig. 2 is a schematic structural view of the tension control system of the present invention.

Fig. 3 is a schematic view of the end tension of a cord during winding of a prior art tension control device.

Fig. 4 is the terminal tension schematic diagram of cotton rope in the winding process of the tension control device of the utility model.

Detailed Description

As shown in fig. 1, the spool 1 around which the wire 2 is wound is placed on the ground or on a stand, the wire 2 is guided in turn by a plurality of guide wheels 3, 4, 5, 6 to a forming hub 12, the winding apparatus comprises a slide rail 7 arranged parallel to the forming hub, a stand 8 is arranged on the slide rail 7, the stand 8 moves left and right along the slide rail 7 during the winding of the wire 2, and the stand 8 moves back to the original position along the slide rail again after the winding of the wire 2 is completed. The support 8 is provided with a hysteresis brake 9, a tension sensor 10, a guide wheel (not shown) and a contact wheel 11, the wire rope is wound on a wire wheel of the hysteresis brake 9 for a circle through the guide wheels 3, 4, 5 and 6 and the hysteresis brake 9, then the wire rope passes through the wire wheel of the tension sensor 10 and finally the wire rope passes through the guide wheel and the contact wheel 11 and is wound on a forming hub 12, and the tension sensor 10 and the hysteresis brake 9 are connected through a PLC (programmable logic controller) 13 to detect and adjust and control the tension at the tail end of the wire rope 2. The guide wheels are increased or decreased according to the arrangement need, not limited to the above number. During winding, the contact wheel 11 compresses tightly the cord to the surface of the forming hub 12, the forming hub 12 rotates to drive the cord 2 to wind, the support 8 moves on the slide rail 7 at a certain speed, and then the cord 2 is wound on the forming hub 12 in a spiral shape.

The adjustment of the tension of the wire rope is realized in the following way, wherein the PLC controller comprises a PLC hardware and a software control part, i.e. a PID function block, as shown in fig. 2, the PLC hardware comprises a PLC/CPU, a digital/analog conversion module, and an analog/digital conversion module. In operation, the tension sensor 10 detects the tension of the end wire rope 2 in real time, the wire rope tension detected by the tension sensor 10 is converted by a digital/analog conversion module of PLC hardware to obtain a real-time tension value, the PID function block calculates and compares the real-time tension value with a tension set value, when the actual tension value is smaller than the tension set value, the PID function block adjusts and outputs a hysteresis braking digital quantity to the analog/digital conversion module in the PLC hardware, the analog/digital conversion module outputs a certain current analog quantity to a hysteresis brake, the hysteresis brake applies damping to the wire rope according to the magnitude of the analog quantity, the larger the analog quantity is, the larger the hysteresis force of the hysteresis brake is, the larger the generated tension is, and the larger the damping to the wire rope is, and vice versa.

In the embodiment, the elastic cord, especially the nylon cord, is taken as an example, and the tension of the cord can be controlled to be 0N to 5N. As can be seen from fig. 4, in this embodiment, the 2N rated tension value is set as an example, when the cord winding tension control device of the present invention is used, since the hysteresis brake is set at the end of the cord to control the tension of the cord, the tension at the end of the cord is relatively uniform and stable in the whole winding process, fig. 4 is a tension fluctuation graph for simultaneously winding two nylon cords, and it can be seen from the graph that the tension fluctuation of the two cords is relatively small. Because the tension at the tail end can be ensured, and the tension at the tail end can be controlled to a lower numerical value, the elastic deformation of the nylon cord is not too large, the equipment ensures that the elastic cord is in a state of low tension and stable and controllable tension, and ensures the shrinkage of a rubber sleeve of the transmission belt and the stability of the frequency of the transmission belt after molding.

The low tension of the present invention is generally less than or equal to 10N compared to the tension of the wound polyester cord.

The present invention relates to a position relationship description, such as left and right, which is only easy to understand according to the specific illustration, and is not to limit the present invention, and the ordinary skilled person in the art can make a plurality of deformations, improvements and replacements without departing from the concept of the present invention, and all belong to the scope of the present invention.

Claims

1. The utility model provides a drive belt cotton rope winding tension controlgear, includes guide wheel, contact wheel for twine drive belt cotton rope to shaping hub (12) on, its characterized in that still includes hysteresis brake (9), tension sensor (10) and PLC controller (13), cotton rope (2) are in proper order through guide wheel (3, 4, 5, 6), hysteresis brake (9), tension sensor (10), on contact wheel (11) final winding to shaping hub (12), hysteresis brake (9) are connected through PLC controller (13) with tension sensor (10).

2. A cord winding tension control device according to claim 1, characterized in that the PLC controller (13) comprises PLC hardware and PID functional blocks.

3. A wire winding tension control device according to claim 1, characterized by a support (8), said hysteresis brake (9), tension sensor (10) and contact wheel (11) being fixed to said support (8).

4. A cord winding tension control device according to claim 3, further comprising a slide rail (7), wherein the bracket (8) is fixed to the slide rail (7) and is movable to the left and right along the slide rail (7).

5. A cord winding tension control device according to claim 4, characterized in that the slide (7) is arranged parallel to the forming hub (12).

6. A cord winding tension control apparatus as claimed in claim 1, wherein the tension on the cord output by the tension sensor end is between 0N and 10N.

7. A cord winding tension control device as claimed in claim 6, wherein the tension on the cord output by the tension sensor end is 2N.

8. A cord wrap tension control device as defined in claim 1, wherein the cord is an elastic cord.

9. A cord wrap tension control device as recited in claim 8, wherein the elastic cord is a nylon cord.