Tensioning wheel of packaging machine

Abstract

The utility model is suitable for the technical field of tensioning wheels, and provides a packing machine tensioning wheel which comprises a rotating rod, and a central shaft and a central shaft with a pressure sensor are arranged at the two ends of the rotating rod respectively. Rollers are respectively arranged on the two central shafts; the center position of the rotating rod is connected with a driver; a reset button is arranged above the center position of the rotating rod; the reset button is fixed on the extending rod of the driver bracket; a hydraulic pump is arranged below the driver bracket; and the maximum retraction length of the hydraulic pump is preset, so that the position of the tensioning wheel can be adjusted in real time, the pretightening force required by the belt is always kept in a relatively stable state, and the problems that the service life of the belt is shortened due to overlarge pretightening force and the working efficiency is reduced due to frequent adjustment of the position of the tensioning wheel are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tension wheels, in particular to a tension wheel for a packaging machine. Background Art

[0002] Packaging machines are machines that package products. Assembly-line integrated production packaging is an important application area of ​​packaging machines. Conveyor belts are indispensable on assembly lines. Long-term use of conveyor belts will cause the conveyor belts to stretch. After the conveyor belts are stretched, the friction between the conveyor belts and the drive wheels of the conveyor belts decreases. When the friction decreases to a certain extent, the drive wheel will cause idling. The tensioning wheel changes its position through its unique structure, props up the conveyor belt, increases the supporting force between the conveyor belt and the drive wheel, and then increases the friction, so that the driver can drive the conveyor belt to rotate again.

[0003] At present, the tensioning wheels of packaging machines are roughly divided into two types: tensioning wheels with full manual intervention and tensioning wheels with torsion springs or springs with semi-manual intervention. The tensioning wheels with full manual intervention require manual adjustment of the tensioning wheel position to set the preload of the conveyor belt after the conveyor belt is loosened. This method is more complicated and needs to be adjusted after a period of time. The tensioning wheels with semi-manual intervention with torsion springs or springs have elastic deformation after compression due to the energy storage effect of the torsion springs or springs set by them. When the conveyor belt is loose, the springs deform, which increases the time interval for manual adjustment. It is simpler than the tensioning wheels with full manual intervention. However, the tensioning wheels with springs or torsion springs and semi-manual intervention need to add a larger preload at the beginning. This larger preload will accelerate the aging and elongation of the belt, reduce the service life of the belt, and each adjustment is more troublesome, increasing labor costs. Utility Model Content

[0004] In view of the above-mentioned defects, the purpose of the utility model is to provide a packaging machine tensioning wheel, which can adjust the position of the tensioning wheel in real time according to the preset pre-tensioning force, to ensure that the pre-tensioning force required by the belt always remains in a relatively stable state, avoiding excessive pre-tensioning force that reduces the life of the belt, and at the same time its automatic adjustment capability reduces labor costs.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a packaging machine tensioning wheel, comprising a rotating rod, a central shaft and a central shaft with a pressure sensor are respectively arranged at both ends of the rotating rod; rollers are respectively arranged on the two central shafts; a driver is connected at the center position of the rotating rod; a reset button is arranged above the center position of the rotating rod; the reset button is fixed on the extension rod of the driver bracket; a hydraulic pump is arranged below the driver bracket; the maximum retraction length of the hydraulic pump is preset;

[0006] The pressure sensor sets a preset pressure value, and when the preset pressure value is not equal to the real-time pressure data, the driver drives the rotating rod to rotate, and when the preset pressure value and the real-time pressure data are equal, the rotating rod stops rotating;

[0007] The rotating rod is rotated to a vertical position, and the rotating rod presses a reset button, and the rotating rod rotates back to its original position;

[0008] After the rotating rod rotates back to its original position, the telescopic shaft of the hydraulic pump retracts, and the rotating rod rotates forward at the same time. When the real-time data of the pressure sensor is equal to the preset pressure value, the hydraulic pump and the driver stop working;

[0009] After the hydraulic pump reaches the maximum retracted length, the hydraulic pump stops working completely, and the driver still drives the rotating rod to rotate to a point where the real-time pressure data and the preset pressure value are equal. When the rotating rod presses the reset button again, the rotating rod stops working completely.

[0010] According to the packaging machine tensioning wheel of the utility model, the predetermined pressure value is greater than the sum of the center axis on the pressure sensor and the gravity of the roller.

[0011] According to the packaging machine tensioning wheel of the utility model, the maximum rotation angle of the rotating rod is 90 degrees.

[0012] According to the packaging machine tensioning wheel of the utility model, after the hydraulic pump reaches the maximum retracted length, the distance between the conveyor belt and the ground is greater than the sum of half the length of the rotating rod and the radius of the roller.

[0013] According to the packaging machine tensioning wheel of the utility model, the hydraulic pump is fixed on a fixed base at the bottom.

[0014] According to the packaging machine tensioning wheel of the utility model, an alarm is arranged above the driver bracket.

[0015] The utility model provides a packaging machine tensioning wheel, comprising a rotating rod, a central axis and a central axis with a pressure sensor are respectively arranged at two ends of the rotating rod, rollers are respectively arranged on the two central axes, a driver is connected at the central position of the rotating rod, a reset button is arranged above the central position of the rotating rod, the reset button is fixed on the extension rod of the driver bracket, a hydraulic pump is arranged below the driver bracket, the hydraulic pump has a preset maximum retraction length, rollers are respectively arranged on the two central axes, and the rollers are located on both sides of the conveyor belt. When the rotating rod rotates, the rollers are driven to rotate around the central part of the rotating rod to form pressure on the conveyor belt, drive the conveyor belt to deform, form a pre-tightening force, and the driver drives the rotating rod to rotate around the central part of the rotating rod. When the rotating rod rotates to contact the reset button, the rotating rod returns to the initial position. The reset button is fixed on the extension rod of the driver bracket and can change its position in real time with the operation of the hydraulic pump. The preset maximum extension length of the hydraulic pump can prevent the conveyor belt from interfering with the ground or other parts. Involved; the pressure sensor sets a preset pressure value, and when the preset pressure value is not equal to the real-time pressure data, the driver drives the rotating rod to rotate, and when the preset pressure value and the real-time pressure data are equal, the rotating rod stops rotating, which can provide a relatively stable preload for the conveyor belt; the rotating rod rotates to a vertical position, the rotating rod presses a reset button, and the rotating rod rotates back to its original position to facilitate the next working cycle; after the rotating rod rotates back to its original position, the telescopic shaft of the hydraulic pump retracts, and the rotating rod rotates forward at the same time, and when the real-time data of the pressure sensor is equal to the preset pressure value, the hydraulic pump and the driver suspend working; after the hydraulic pump reaches the maximum retraction length, the hydraulic pump stops working completely, and the driver drives the rotating rod to rotate to the point where the real-time pressure data and the preset pressure value are equal again, and when the rotating rod presses the reset button again, the rotating rod stops working completely. The complete cessation of the rotating rod means that the tensioning wheel has reached its working limit and the conveyor belt has a large deformation. At this time, the worker needs to replace the conveyor belt with a new one. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of part A;

[0018] Figure 3 yes Figure 1 A schematic diagram of the front view structure of

[0019] In the figure: 1- conveyor belt, 2- roller, 3- pressure sensor, 31- center shaft, 4- rotating rod, 5- reset button, 6- driver, 7- hydraulic pump, 71- telescopic shaft, 8- fixed base, 9- driver bracket, 91- extension rod, 92- alarm. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] See also Figure 1 and Figure 2The utility model provides a packaging machine tensioning wheel, including a rotating rod 4, a central shaft 31 and a central shaft 31 with a pressure sensor 3 are respectively arranged at both ends of the rotating rod 4, and rollers 2 are respectively arranged on the two central shafts 31. The rollers 2 are driven by the friction provided by the conveyor belt 1 to rotate around the central shaft 31, and the sliding friction is converted into rolling friction, which reduces the wear of the conveyor belt 1 caused by the friction and improves the service life of the conveyor belt 1. The pressure sensor 3 is responsible for real-time sensing of the force acting on the sensing part of the pressure sensor 3. The force acting on the sensing part of the pressure sensor 3 is the combined force of the gravity of the balancing central shaft 31 itself, the gravity of the roller 2, and the pressure of the conveyor belt 1 on the roller 2. The roller 2 is responsible for the conveyor belt 1. The contact provides support force for the conveyor belt 1, so that the conveyor belt 1 is tensioned, ensuring that there is sufficient friction between the conveyor belt 1 and the conveyor belt driving wheel; the driver 6 is connected to the center position of the rotating rod 4, and the driver 6 is responsible for driving the rotating rod 4 to rotate around its center; a reset button 5 is set above the center position of the rotating rod 4, and the reset button 5 is fixed on the extension rod 91 of the driver bracket 9. The reset button 5 is fixed on the extension rod 91 of the driver bracket 9 and is located directly above the center position of the rotating rod 4, ensuring that when the telescopic rod 71 of the hydraulic pump 7 is extended and retracted, the reset button 5 maintains its relative position with the center of the rotating rod 4 without changing. When the rotating rod 4 rotates to the reset button 5 position, the rotating rod 4 can press the reset button Button 5 activates the reset command; a hydraulic pump 7 is arranged under the driver bracket 9, and the maximum retraction length of the hydraulic pump 7 is preset. The hydraulic pump 7 is responsible for changing the position of the driver 6 and then changing the position of the roller 2. The preset maximum retraction length of the hydraulic pump 7 ensures that the conveyor belt 1 does not interfere with the ground or other parts; the pressure sensor 3 sets a preset pressure value. When the preset pressure value is not equal to the real-time pressure data, the driver 6 drives the rotating rod 4 to rotate. When the preset pressure value and the real-time pressure data are equal, the rotating rod 4 stops rotating. The conveyor belt 1 will be extended when in use. When the conveyor belt 1 is extended, the preload force of the conveyor belt 1 is reduced, the supporting force of the roller 2 on the conveyor belt 1 is reduced, and the real-time pressure data will decrease. After the real-time pressure data decreases, the driver 6 After receiving the signal, the rotating rod 4 is driven to rotate until the real-time pressure data and the preset pressure value are equal, and then the rotation is stopped, so as to ensure that the preload force of the conveyor belt 1 changes within a small range; the rotating rod 4 rotates to a vertical position, and the rotating rod 4 presses the reset button 5, and the rotating rod 4 rotates back to its original position in the opposite direction. When the rotating rod 4 rotates to a vertical position, the rotating rod 4 will contact the reset button 5 to press the reset button 5. After the reset button 5 is pressed, the driver 6 receives the reset command and rotates back to its original position along the original motion path. The setting of the reset button 5 ensures that the rotating rod 4 has a fixed rotation angle, and interference will not occur due to excessive rotation angle. After the reset button 5 is pressed, the driver 6 reverses and drives the rotating rod 4 to return to its initial position along the original motion path;After the rotating rod 4 is reversed and returned to its original position, the telescopic shaft 71 of the hydraulic pump 7 is retracted, and the rotating rod 4 rotates forward at the same time. When the real-time data of the pressure sensor 5 is equal to the preset pressure value, the hydraulic pump 7 and the driver 6 stop working, completing a working cycle. After the rotating rod 4 is reversed and returned to its original position, the telescopic shaft 71 of the hydraulic pump 7 is retracted, driving the rotating rod 4 to move downward. When the telescopic shaft 71 of the hydraulic pump 7 is retracted, the rotating rod 4 rotates forward at the same time, which can avoid the problem that the roller 2 on the central axis 31 of the belt pressure sensor 3 and the conveyor belt 1 are separated due to the rotation of the rotating rod 4. After the hydraulic pump 7 reaches the maximum retracted length, the hydraulic pump 7 no longer works, and the driver 6 still drives the rotating rod 4 to rotate to the point where the real-time pressure data and the preset pressure value are equal. When the rotating rod 4 presses the reset button 5 again, the rotating rod 4 stops working completely, and the tensioning wheel works to the limit position. The conveyor belt is greatly deformed and needs to be replaced. ;

[0022] See also Figure 2 and Figure 3 , further, the preset pressure value is greater than the sum of the gravity of the central axis 31 and the roller 2 on the pressure sensor, ensuring that the real-time pressure data is less than the preset pressure value when only the gravity of the central axis 31 and the roller 2 is in effect, and when there is no external force applied by the conveyor belt 1 on the roller 2, the driver 6 can receive the signal to drive the rotating rod 4 to rotate to the position where the real-time pressure data is equal to the preset pressure value; the maximum rotation angle of the rotating rod 4 is 90 degrees, ensuring that the rotating rod 4 will not produce a large angle rotation to cause interference between the conveyor belt 1 and other parts; after the hydraulic pump 7 reaches the maximum retraction length, the distance between the conveyor belt 1 and the ground is greater than the rotation The sum of half the length of the rod 4 and the radius of the roller 2 ensures that the conveyor belt 1 will not interfere with the ground; the hydraulic pump 7 is fixed on the fixed base 8 at the bottom, and the fixed base 8 provides a stable fixed structure for the hydraulic pump 7 to ensure that the overall structure will not change its position due to external force. Until the hydraulic pump 7 works to the limit position, it will no longer work. The driver 6 drives the rotating rod 4 again to press the reset button 5 and then no longer works, triggering the alarm 92. When the tensioning wheel runs to the limit position, the alarm 92 can remind the workers to replace the conveyor belt 1 in time to avoid the conveyor belt 1 being replaced in time and affecting the work progress.

[0023] In summary, the utility model provides a packaging machine tensioning wheel, including a rotating rod, a central axis and a central axis with a pressure sensor are respectively arranged at both ends of the rotating rod, rollers are respectively arranged on the two central axises, a driver is connected at the center position of the rotating rod, a reset button is arranged above the center position of the rotating rod, the reset button is fixed on the extension rod of the driver bracket, a hydraulic pump is arranged below the driver bracket, the hydraulic pump has a preset maximum retraction length, rollers are respectively arranged on the two central axises, and the rollers are located on both sides of the conveyor belt. When the rotating rod rotates, the rollers are driven to rotate around the center part of the rotating rod to form pressure on the conveyor belt, drive the conveyor belt to deform, and form a pre-tightening force. The driver drives the rotating rod to rotate around the center part of the rotating rod. When the rotating rod rotates to contact the reset button, the rotating rod returns to the initial position. The reset button is fixed on the extension rod of the driver bracket and can change its position in real time with the operation of the hydraulic pump. The preset maximum extension length of the hydraulic pump can prevent the conveyor belt from contacting the ground or other parts. Interference occurs in other parts; the pressure sensor sets a preset pressure value, and when the preset pressure value is not equal to the real-time pressure data, the driver drives the rotating rod to rotate, and when the preset pressure value and the real-time pressure data are equal, the rotating rod stops rotating, which can provide a relatively stable preload for the conveyor belt; the rotating rod rotates to a vertical position, the rotating rod presses a reset button, and the rotating rod rotates back to its original position to facilitate the next working cycle; after the rotating rod rotates back to its original position, the telescopic shaft of the hydraulic pump retracts, and the rotating rod rotates forward at the same time. When the real-time data of the pressure sensor is equal to the preset pressure value, the hydraulic pump and the driver stop working, completing a working cycle; after the hydraulic pump reaches the maximum retraction length, the hydraulic pump no longer works, and the driver drives the rotating rod to rotate to the point where the real-time pressure data and the preset pressure value are equal again. When the rotating rod presses the reset button again, an alarm is triggered. The triggering of the alarm means that the tensioning wheel has reached its working limit and the conveyor belt has a large deformation, prompting the worker to replace the conveyor belt.

[0024] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A tension wheel for a packaging machine, characterized in that: It comprises a rotating rod, and a central shaft and a central shaft with a pressure sensor are respectively arranged at two ends of the rotating rod; rollers are respectively arranged on the two central shafts; a driver is connected at the center of the rotating rod; a reset button is arranged above the center of the rotating rod; the reset button is fixed on the extension rod of the driver bracket; a hydraulic pump is arranged below the driver bracket; The hydraulic pump has a preset maximum retraction length; The pressure sensor sets a preset pressure value, and when the preset pressure value is not equal to the real-time pressure data, the driver drives the rotating rod to rotate, and when the preset pressure value and the real-time pressure data are equal, the rotating rod stops rotating; The rotating rod is rotated to a vertical position, and the rotating rod presses a reset button, and the rotating rod rotates back to its original position; After the rotating rod rotates back to its original position, the telescopic shaft of the hydraulic pump retracts, and the rotating rod rotates forward at the same time. When the real-time data of the pressure sensor is equal to the preset pressure value, the hydraulic pump and the driver stop working; After the hydraulic pump reaches the maximum retracted length, the hydraulic pump stops working completely, and the driver still drives the rotating rod to rotate to a point where the real-time pressure data and the preset pressure value are equal. When the rotating rod presses the reset button again, the rotating rod stops working completely.

2. The packaging machine tension wheel according to claim 1, characterized in that: The predetermined pressure value is greater than the sum of the center axis on the pressure sensor and the drum gravity.

3. The tension wheel of the packaging machine according to claim 2, characterized in that: The maximum rotation angle of the rotating rod is 90 degrees.

4. The tension wheel of the packaging machine according to claim 3, characterized in that: After the hydraulic pump reaches the maximum retracted length, the distance between the conveyor belt and the ground is greater than the sum of half the length of the rotating rod and the radius of the roller.

5. The tension wheel of the packaging machine according to claim 1, characterized in that: The hydraulic pump is fixed on a fixed base at the bottom.

6. The tension wheel of the packaging machine according to claim 1, characterized in that: An alarm is arranged above the driver bracket.

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