Transport device with automatic adjustment of track width

Abstract

The present invention relates to the technical field of accurate material transportation, and discloses a transmission device for automatically adjusting the track width, including a transmission component, wherein the transmission component includes a fixed side track, a movable side track, and a driving component, wherein the fixed side track is fixedly arranged, the movable side track is movably arranged relative to the fixed side track, a transmission track is formed between the fixed side track and the movable side track, and the driving component is connected to the movable side track to drive the movable side track to approach or move away from the fixed side track; and a sensing component, including a position marking element and a position detection element, wherein the position marking element is arranged on the fixed side track, and the position detection element is arranged on the movable side track; and a control system, which is connected to the position detection element and the driving component to control the operation of the driving component. The present invention can achieve high accuracy, light weight and low cost of the structure.

Description

Technical Field

[0001] The invention relates to the technical field of precise material transportation, and in particular to a transmission device capable of automatically adjusting track width. Background Art

[0002] Printing equipment is compatible with different specifications of paper, usually corresponding to different widths of paper. The paper conveying track of the printing equipment does not need to be changed, but when the accuracy of the conveying structure is low, the paper is easy to form an angle deviation in the conveying track, which in turn causes the printed information to be offset. If the conveying track is adapted to the width of the paper, the situation of paper jams and printing offsets during paper conveyance will be greatly reduced.

[0003] Therefore, it is necessary to develop a transmission device that can automatically adjust the track width in real time. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing printing equipment cannot automatically adjust the track width to adapt the track width to the paper width, resulting in an angular deviation of the printed paper in the conveying track, thereby causing the printed information to be offset.

[0005] In order to solve the above technical problems, the object of the present invention is to provide a transmission device for automatically adjusting the track width, comprising:

[0006] a conveying component, the conveying component comprising a fixed side track, a movable side track and a driving component, the fixed side track being fixedly arranged, the movable side track being movably arranged relative to the fixed side track, a conveying track for conveying printing paper being formed between the fixed side track and the movable side track, the driving component being connected to the movable side track, and the driving component driving the movable side track to approach or move away from the fixed side track; and

[0007] The sensing component includes a position marking element and a position detection element. The position marking element is arranged on the fixed side track or the movable side track, and the position detection element is arranged on the movable side track or the fixed side track accordingly. The positions of the position marking element and the position detection element can be interchanged. For example, when the position marking element is arranged on the movable side track, the position detection element is relatively arranged on the fixed side track; when the position marking element is arranged on the fixed side track, the position detection element is relatively arranged on the movable side track. And

[0008] A control system is connected to the position detection element and the drive assembly to control the operation of the drive assembly.

[0009] Preferably, there are multiple position detection elements, and they are arranged at intervals between the fixed side track and the movable side track; the multiple position detection elements are arranged in a collinear manner, and the straight line formed by the multiple position detection elements in a collinear manner is parallel to the motion trajectory of the position marking element, and the straight line takes the motion trajectory of the position marking element as the central axis and is arranged around the circumference of the central axis, that is, the straight line formed by the collinear position detection elements surrounds and is arranged parallel to the circumference of the motion trajectory of the position marking element, so as not to hinder the operation of the movable side track and to be sensed / detected by the position detection elements, and the position marking element is arranged on the movable side track. The intervals of the distribution positions of the position detection elements can be set as needed. Specifically, the range in which the straight line is arranged around the circumference of the central axis can constitute a circular ring, an elliptical ring, or a square ring, which can be specifically set according to actual conditions.

[0010] Preferably, the straight line is located above or below the movement trajectory of the position marking element, so that the position detection element on the straight line can detect the position of the position marking element and the movable side track on which the position marking element is set, so that the control system controls the driving component to adjust the position of the movable track so that the distance between the fixed side track and the movable side track is adapted to the width of the printing paper.

[0011] Preferably, an upper transmission part and a lower transmission part are respectively provided above and below the fixed side rail and the movable side rail, and a plurality of position detection elements are arranged at intervals on the upper transmission part and / or the lower transmission part.

[0012] Preferably, the position detection element is a Hall sensor, the position marking element is a magnet, and the Hall sensor is arranged on a side close to the magnet.

[0013] The sensing component includes multiple groups of Hall sensors, the distribution positions of the Hall sensors correspond to the positions of the movable side tracks when the track widths are different, and are close to one side of the magnet. The Hall sensors are connected to the control system, and the drive motor is connected to the control system. The control system can calculate the width of the conveying track according to the distance between the Hall sensors, and compare the calculated result with the predetermined conveying track width to control the drive motor to drive the movable side track to move toward the predetermined conveying track.

[0014] The Hall sensor is an instrument that can sense magnetic flux. When the movable track and its magnet reach the Hall sensor at the position corresponding to the preset width position, the magnetic flux value sensed by the latter will increase rapidly. When the magnetic flux value exceeds the preset value, the Hall sensor sends a signal to the control system to confirm that the track position has been adjusted to the position of the Hall sensor. At this time, the control system controls the drive motor to no longer push the movable side track to the fixed side track, that is, the distance between the movable side track and the fixed side track is just close to the width of the printing paper, which can limit the forward conveying trajectory of the printing paper, prevent the printing paper from forming an angle deviation in the transmission track, and avoid the deviation of the printing information.

[0015] Preferably, the driving assembly comprises a track bracket arranged on the back side of the movable side track away from the fixed side track, a power screw assembly passing through the track bracket, the movable side track and the fixed side track in sequence, and a driving motor connected to one end of the power screw to drive the power screw assembly to rotate. The fixed side track and the track bracket are both connected to the upper transmission plate and the lower transmission plate by screws. The movable side track, the fixed side track and the track bracket are parallel to each other. The power screw assembly is perpendicular to the track bracket, the movable side track and the fixed side track respectively. The distance between the inner side of the movable side track and the inner side of the fixed side track defines the track width, that is, the width of the printed paper forwardly conveyed. The driving motor is a DC motor. The driving motor drives the power screw assembly to rotate. The movable side track is arranged on the power screw assembly. When the power screw assembly rotates forward or reversely, the movable side track is driven to approach or move away from the fixed side track. The movable side track is threadedly connected to the power screw assembly so that the movable side track is driven to approach or move away from the fixed side track when the power screw rotates forward or reversely. Of course, the fixed side rails and the rail brackets may also be arranged to be detachably connected to the upper transmission plate and the lower transmission plate to facilitate maintenance of the transmission device.

[0016] Preferably, a fixed screw hole is provided on the movable side track to engage with the power screw assembly, so that the power screw rotates along its own axis to drive the movable side track to move vertically relative to it. The track bracket and the fixed side track are provided with a through hole for the power screw assembly to pass through, so as to support the power screw assembly passing between the track bracket and the fixed side track.

[0017] Preferably, the power screw assembly is provided with one or more groups, and a speed change assembly is provided at the connection between the drive motor and the power screw to transmit torque to the power screw assembly to provide power for the movement of the movable side track.

[0018] Preferably, the position detecting element is arranged on the movable side track, and the position marking element is provided in plurality and is located on the circumferential side of the motion trajectory of the movable side track. That is, the technical solution swaps the positions of the position detecting element and the position marking element, and similarly utilizes the rapid increase in magnetic flux generated by the Hall sensor when it reaches the position of the magnet set at intervals. After the magnetic flux exceeds a preset value, the Hall sensor sends a signal to the control system to determine the position of the position detecting element and the movable side track on which it is set.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The transmission device for automatically adjusting the track width of the present invention is provided with a fixed side track and a movable side track movably arranged relative to the fixed side track, and a driving component for driving the movable side track to approach or move away from the fixed side track. Position sensing components are provided on the fixed side track and the movable side track. A position detection element, i.e., a Hall sensor, is provided on the fixed side track. A position marking element, i.e., a magnet causing a change in magnetic flux, is provided on the movable side track to cause a change in magnetic flux by moving the movable side track. The Hall sensor, a position detection element, detects the change in magnetic flux when the position marking element approaches to obtain information on the width of the conveying track and the position information of the movable side track. The control system adjusts the driving component accordingly, so that the track width is adjusted to be suitable for the width of the printing paper, thereby preventing the printing paper from forming an angle deviation in the conveying track and avoiding deviation of the printing information.

[0021] 2. The transmission device for automatically adjusting the track width of the present invention uses the position information of the movable side track obtained by the Hall sensor, which is not easy to cause the positioning reference to be lost. Compared with the large size and high cost of the servo motor, it can effectively reduce the volume and achieve high accuracy, light weight and low cost of the structure to meet the requirements of low-precision transmission structure being compatible with papers of different widths. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a transmission device for automatically adjusting track width according to an embodiment of the present invention.

[0023] Figure 2 A partial structural cross-sectional view of a transmission device for automatically adjusting track width according to an embodiment of the present invention.

[0024] Explanation of the accompanying drawings: In the drawings, 1, conveying component; 2, power screw assembly; 3, DC motor; 4, speed change assembly; 5, induction component; 6, control system; 10, conveying track; 11, fixed side track; 12, movable side track; 12a, fixed screw hole; 12b, position marking element; 13, track bracket; 14, upper transmission part; 15, lower transmission part. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Embodiment: This embodiment provides a transmission device for automatically adjusting the track width, including a transmission component, an induction detection component, and a control system. The transmission component includes a fixed side track, a movable side track, and a driving component. The fixed side track is fixedly arranged, and the movable side track is movably arranged relative to the fixed side track. A transmission track for conveying printing paper is formed between the fixed side track and the movable side track. The driving component is connected to the movable side track, and the driving component drives the movable side track to approach or move away from the fixed side track.

[0027] The sensing component includes a position marking element and a position detection element. The position marking element is arranged on the movable side track, and the position detection element is correspondingly arranged on the fixed side track. Specifically, in this embodiment, the position detection element is a Hall sensor, and the position marking element is a magnet. The Hall sensor is connected to the control system, and the drive motor is connected to the control system.

[0028] In this embodiment, there are multiple position detection elements, which are arranged at intervals between the fixed side track and the movable side track. The movable side track here refers to the space formed when the fixed side track and the movable side track are farthest apart. Multiple position detection elements are arranged in a collinear manner. The straight line formed by the multiple position detection elements in a collinear manner is parallel to the motion track of the position marking element, and the straight line takes the motion track of the position marking element as the central axis and is arranged around the circumference of the central axis, that is, the straight line formed by the collinear position detection elements surrounds and is arranged in parallel to the circumference of the motion track of the position marking element, so as not to hinder the operation of the movable side track and to be detected by the position detection elements. The position marking element is arranged on the movable side track. The intervals of the distribution positions of the position detection elements can be set as needed.

[0029] Specifically, an upper transmission part and a lower transmission part are respectively provided above and below the fixed side rail and the movable side rail, the fixed side rail and the rail bracket are respectively connected to the upper transmission plate and the lower transmission plate by screws, a cavity is formed between the fixed side rail and the movable side rail, the upper transmission part and the lower transmission part are located in the cavity, or are connected to the fixed side rail or the rail bracket, and the connection position does not exceed the fixed side rail and the rail bracket, and a plurality of position detection elements, i.e., Hall sensors, are arranged at intervals on the lower transmission part to detect changes in the magnetic flux of the Hall sensor.

[0030] Of course, multiple Hall sensors can also be arranged on the upper transmission part or on the front or rear side of the motion trajectory of the movable side track, and the corresponding magnet is also arranged on the side of the movable side track close to the Hall sensor, so that the Hall sensor can detect the change in magnetic flux when the magnet approaches, so that the position detection element on the straight line can detect the position marking element and the position of the movable side track where the position marking element is set, so that the control system controls the driving component to adjust the position of the movable track so that the distance between the fixed side track and the movable side track is adapted to the width of the printing paper.

[0031] The control system is connected to the position detection element and the drive assembly to drive and control the operation of the drive assembly. The drive assembly includes a track bracket disposed on the back side of the movable side track away from the fixed side track, a power screw assembly passing through the track bracket, the movable side track and the fixed side track in sequence, and a drive motor connected to one end of the power screw to drive the power screw assembly to rotate. The drive motor is a DC motor. The movable side track, the fixed side track and the track bracket are parallel to each other. The power screw assembly is perpendicular to the track bracket, the movable side track and the fixed side track respectively. The distance between the inner side of the movable side track and the inner side of the fixed side track defines the track width, that is, the width of the printed paper conveyed forward.

[0032] Specifically, a fixed screw hole is provided on the movable side track to engage with the power screw assembly, so that the power screw rotates along its own axis to drive the movable side track to move vertically relative to the rotation direction of the power screw. The track bracket and the fixed side track are provided with through holes for the power screw assembly to pass through, so as to support the power screw assembly passing between the track bracket and the fixed side track.

[0033] The power screw assembly is provided with one or more groups to adjust the front and rear ends of the movable side track to be parallel to the fixed side track. A speed change assembly is provided at the connection between the drive motor and the power screw to transmit torque to the power screw assembly to provide power for the movable side track to move.

[0034] The working process of the present invention is as follows: when the printing paper of the first width is replaced with the second width, the printing paper is placed in the conveying track along the side close to the fixed side track, and then the position of the movable side track is identified by the sensing component, and the distance between the movable side track and the side of the second width printing paper away from the fixed side track is calculated, and then the driving motor of the driving component drives the movable side track to adjust to the position close to the second width printing paper. When the movable side track moves to the upper part of the Hall sensor below the printing paper of the second width, the magnet on the movable side track causes the magnetic flux change of the Hall sensor to exceed a predetermined value, and the Hall sensor sends a signal to the control system, and the control system controls the driving motor to stop working, and the movable side track also stops at the second width printing paper, limiting the conveying track width of the second width printing paper, and avoiding the printing information displacement caused by the angle displacement of the second width printing paper in the conveying track.

[0035] In summary, the transmission device for automatically adjusting the track width of the present invention is provided with a fixed side track and a movable side track that is movably arranged relative to the fixed side track, and a driving component that drives the movable side track to approach or move away from the fixed side track. Position sensing components are provided on the fixed side track and the movable side track, and a position detection element, i.e., a Hall sensor, is provided on the fixed side track; a position marking element, i.e., a magnet that causes a change in magnetic flux, is provided on the movable side track; the magnetic flux change is caused by the movement of the movable side track, and the magnetic flux change when the position marking element approaches is detected by the position detection element Hall sensor to obtain information on the width of the conveying track and the position information of the movable side track; the control system adjusts the driving component accordingly, so that the track width is adjusted to adapt to the width of the printing paper, so as to prevent the printing paper from forming an angular deviation in the transmission track and avoid deviation of the printing information; and the position information of the movable side track obtained by the Hall sensor is not easy to cause the positioning reference to be lost, and the volume can be effectively reduced relative to the large volume and high cost of the servo motor, so as to achieve high accuracy, lightness and low cost of the structure, so as to meet the requirements of low-precision transmission structure being compatible with papers of different widths.

[0036] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A transmission device for automatically adjusting track width, characterized in that: include A conveying component, the conveying component comprises a fixed side track, a movable side track and a driving component, the fixed side track is fixedly arranged, the movable side track is movably arranged relative to the fixed side track, a conveying track for conveying printing paper is formed between the fixed side track and the movable side track, the driving component is connected to the movable side track, and the driving component drives the movable side track to approach or move away from the fixed side track; as well as The induction component includes a position marking element and a position detection element, wherein the position detection element is a Hall sensor, the position marking element is a magnet, a plurality of the position detection elements are provided, the position detection elements are arranged at intervals between the fixed side track and the movable side track, and the position marking element is arranged on the movable side track; as well as A control system connected to the position detection element and the drive assembly to control the operation of the drive assembly; When the printing paper of the first width is changed to the second width, the printing paper is placed into the conveying track along the side close to the fixed side track, and then the position of the movable side track is identified by the sensing component, and the distance between the movable side track and the side of the second width printing paper away from the fixed side track is calculated, and then the driving motor of the driving component drives the movable side track to adjust to the position close to the second width printing paper. When the movable side track moves to the upper part of the Hall sensor below the printing paper of the second width, the magnet on the movable side track causes the magnetic flux change of the Hall sensor to exceed a predetermined value, and the Hall sensor sends a signal to the control system, and the control system controls the driving motor to stop working, and the movable side track also stops at the second width printing paper, thereby limiting the conveying track width of the second width printing paper.

2. The transmission device for automatically adjusting the track width according to claim 1, characterized in that: The plurality of position detection elements are collinearly arranged, and the straight line formed by the plurality of position detection elements is parallel to the motion trajectory of the position marking element, and the straight line takes the motion trajectory of the position marking element as the central axis and is arranged around the circumference of the central axis, and the position marking element is arranged on the movable side track.

3. The transmission device for automatically adjusting the track width according to claim 2, characterized in that: The straight line is located above or below the movement trajectory of the position marking element.

4. The transmission device for automatically adjusting track width according to any one of claims 1 to 3, characterized in that: An upper transmission part and a lower transmission part are respectively provided above and below the fixed side rail and the movable side rail, and a plurality of position detection elements are arranged at intervals on the upper transmission part and / or the lower transmission part.

5. The transmission device for automatically adjusting the track width according to claim 4, characterized in that: The driving assembly includes a track bracket arranged on the back side of the movable side track away from the fixed side track, a power screw assembly passing through the track bracket, the movable side track and the fixed side track in sequence, and a driving motor connected to one end of the power screw for driving the power screw assembly to rotate. The movable side track, the fixed side track and the track bracket are parallel to each other, and the power screw assembly is respectively perpendicular to the track bracket, the movable side track and the fixed side track.

6. The transmission device for automatically adjusting the track width according to claim 5, characterized in that: The movable side track is provided with a fixed screw hole engaged with the power screw assembly, and the track bracket and the fixed side track are provided with a through hole for the power screw assembly to pass through.

7. The transmission device for automatically adjusting the track width according to claim 5 or 6, characterized in that: The power screw assembly is provided with one or more groups, and a speed change assembly is provided at the connection between the drive motor and the power screw.

8. The transmission device for automatically adjusting track width according to claim 5, characterized in that: The fixed side rail and the rail bracket are both connected to the upper transmission plate and the lower transmission plate by screws.

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