Pneumatic tensioning mechanism

Abstract

The application relates to the technical field of conveying devices, in particular to a pneumatic tensioning mechanism, which comprises a base and a pneumatic balancing unit, the front end of the base is provided with a gas cylinder, the top end of the output shaft of the gas cylinder is provided with a lever seat, a rotating piece is arranged between the lever seat and the output shaft of the gas cylinder; the pneumatic balancing unit is used for balancing the gas pressure of the gas cylinder; the end, away from the output shaft of the gas cylinder, of the lever seat is fixedly connected with a bearing seat, a rotating shaft is arranged between the bearing seat and the base; a movable shaft is movably sleeved on the inner side of the bearing seat; the gas cylinder is arranged, the structure of the screw plus spring is replaced by the gas cylinder, the pressure is controlled by the gas cylinder, when the thickness of the plate is uneven, the double-gas-cylinder pressure control roller can adapt to the thickness of the plate and provide stable pressure output, and the gas cylinder is different from the spring in that the pushing force of the gas cylinder is consistent at any position, therefore, the roller can provide stable pushing force regardless of the height of movement, and the roller is relatively durable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of conveying device, in particular to a pneumatic tensioning mechanism. BACKGROUND

[0002] The conveying device of the plate material conveys the plate material through the setting of the roller, so the roller must keep tension and contact with the plate material, for this, the traditional device sets the spring plus screw method to realize the tension of the roller, however, because the plate material is not processed, the thickness is different everywhere, when the thickness of the plate material changes greatly, because the spring force and the compression ratio are related, the pressure of the thick plate is large, and the pressure of the thin plate is small, so it will cause the driving force of the roller to be not stable enough, in addition, because the spring force will change in the use process, especially for a long time, when the spring force decreases, the screw needs to be adjusted manually according to experience to compress the spring to increase the spring force, for this, we provide a pneumatic tensioning mechanism to solve the above problems. SUMMARY

[0003] In view of the fluctuation of the spring in the prior art which can cause the driving force of the roller to be not stable enough, and the change of the spring force caused by long time use, the screw needs to be adjusted manually to compress the spring to increase the spring force, the present application provides a pneumatic tensioning mechanism.

[0004] The technical scheme adopted by the present application to solve the technical problems is:

[0005] A pneumatic tensioning mechanism, comprising a base and a pneumatic balancing unit, the front end of the base is provided with a gas cylinder, the top end of the output shaft of the gas cylinder is provided with a lever seat, and a rotating part is arranged between the lever seat and the output shaft of the gas cylinder;

[0006] The pneumatic balancing unit is used for balancing the gas pressure of the gas cylinder;

[0007] The end of the lever seat away from the output shaft of the gas cylinder is fixedly connected with a bearing seat, and a rotating shaft is arranged between the bearing seat and the base;

[0008] The inside of the bearing seat is movably sleeved with a movable shaft, and the outer side of the middle part of the movable shaft is provided with a roller;

[0009] The opposite side outer wall of the base is fixedly connected with two groups of middle blocks, and a connecting block is arranged between the two groups of middle blocks;

[0010] The top support is fixedly installed on the top outer wall of the base.

[0011] The pneumatic balance unit further comprises a connecting rod arranged in the inner side of the connecting block, one end of the connecting rod is movably connected with a movable rod, the movable rod is movably arranged with a piston rod at the end away from the connecting rod, a roller is arranged between the piston rod and the connecting rod, and the outer wall of the top of the top support is fixedly installed with an air pressure stabilizer at the position corresponding to the piston rod.

[0012] The movable rod and the connecting rod are rotatably connected through a pin shaft.

[0013] The top of the piston rod is movably sleeved in the inner side of the air pressure stabilizer.

[0014] The air inlet of the air pressure stabilizer is throughly connected with the air outlet of the cylinder for balancing the air pressure of the cylinder.

[0015] The rotating part can be a bearing, and the lever seat and the cylinder are rotatably connected through the bearing.

[0016] The plurality of groups of rollers are arranged with equal spacing between each adjacent two groups of rollers.

[0017] The outer wall of the roller is uniformly provided with a plurality of groups of anti-skid patterns.

[0018] The roller and the connecting block are provided with a gap for the plate to pass through.

[0019] The lever seat drives the bearing seat to rotate around the rotating shaft as the center.

[0020] The beneficial effects of the present application are as follows:

[0021] 1. The pneumatic tensioning mechanism comprises a cylinder, which replaces the screw and spring structure, controls the pressure by using the cylinder, and provides stable pressure output when the thickness of the plate is uneven. The cylinder is different from the spring in that the pushing force of the cylinder is consistent at any position, so the roller can provide stable pushing force regardless of the movement height, and is more durable.

[0022] 2. The pneumatic tensioning mechanism comprises an air pressure balance unit, the air pressure stabilizer in the air pressure balance unit is in communication with the cylinder, the pressure of the cylinder increases after being extruded, the air pressure stabilizer automatically discharges the excess air to restore to the set pressure, and the cylinder provides stable pushing force. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described below in conjunction with the drawings and examples.

[0024] Figure 1 It is a first perspective view of the pneumatic tensioning mechanism.

[0025] Figure 2 It is a second perspective view of a pneumatic tensioning mechanism;

[0026] Figure 3 It is Figure 2 It is a partial enlarged view of A in the middle.

[0027] In the figure: 1, base; 2, cylinder; 3, movable shaft; 4, bearing seat; 5, lever seat; 6, bearing; 7, rotating shaft; 8, connecting block; 9, middle block; 10, top support; 11, air pressure stabilizer; 12, connecting rod; 13, piston rod; 14, roller; 15, movable rod; 16, roller. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0029] As Figure 1 shown, the pneumatic tensioning mechanism of the present application comprises a base 1 and a pneumatic balancing unit, the front end of the base 1 is provided with a cylinder 2, the output shaft of the cylinder 2 is provided with a lever seat 5 at the top end, and a bearing 6 is arranged between the lever seat 5 and the output shaft of the cylinder 2; the pneumatic balancing unit is used to balance the air pressure of the cylinder 2; the end of the lever seat 5 away from the output shaft of the cylinder 2 is fixedly connected with a bearing seat 4, a rotating shaft 7 is arranged between the bearing seat 4 and the base 1, and the bearing seat 4 rotates around the rotating shaft 7 as the center; a movable shaft 3 is movably sleeved on the inner side of the bearing seat 4, and a roller 14 is arranged on the outer side of the middle part of the movable shaft 3;

[0030] As Figure 1 shown, the roller 14 is provided with multiple groups, and the distance between every adjacent two groups of rollers 14 is equal; a gap for the passage of the plate is arranged between the roller 14 and the connecting block 8; a plurality of anti-skid patterns are uniformly arranged on the outer wall of the roller 14; the number of the rollers 14 and the anti-skid patterns arranged thereon increase the friction between the roller 14 and the plate, and the rotation of the roller 14 drives the plate to be transmitted in the equipment;

[0031] When the plate begins to enter the device, the roller 14 presses the plate and rotates, and the roller 14 will be raised due to the uneven thickness of the plate. The roller 14 is connected between the movable shaft 3 and the bearing seat 4, so that when the roller 14 is raised, the bearing seat 4 is inevitably raised, and the bearing seat 4 is fixedly connected with the lever seat 5, and the bearing seat 4 and the lever seat 5 rotate around the rotating shaft 7. According to the lever principle, the rising of the bearing seat 4 will cause the falling of the lever seat 5. Since the lever seat 5 is connected between the bearing 6 and the output shaft of the air cylinder 2, the output shaft of the air cylinder 2 is driven to press down, so that the air cylinder 2 is compressed. The air cylinder 2 is further connected with the air pressure balancing unit, and the excess air is discharged through the air pressure balancing unit to restore the original set pressure of the air cylinder 2, so that the air cylinder 2 provides stable thrust for the roller 14, facilitating the transportation of the plate. As shown in Figures 2-3 The base 1 is fixedly connected with two groups of intermediate blocks 9 on one side of the outer wall, and the connecting block 8 is arranged between the two groups of intermediate blocks 9. The top support 10 is fixedly installed on the top outer wall of the base 1. The pneumatic balancing unit further comprises a connecting rod 12 arranged on the inner side of the connecting block 8. One end of the connecting rod 12 is movably connected with an movable rod 15. The movable rod 15 is movably provided with a piston rod 13 at the end away from the connecting rod 12. The piston rod 13 is provided with a roller 16 between the connecting rod 12. The air pressure stabilizer 11 is fixedly installed on the top outer wall of the top support 10 at a position corresponding to the piston rod 13. The movable rod 15 and the connecting rod 12 are rotatably connected through a pin shaft. The top of the piston rod 13 is movably sleeved on the inner side of the air pressure stabilizer 11. The air inlet of the air pressure stabilizer 11 is throughly connected with the air outlet of the air cylinder 2, and is used for balancing the air pressure of the air cylinder 2.

[0032] The specific process of discharging air by the air pressure balancing unit is that the output shaft of the air cylinder 2 is pressed down, so that the excess air in the air cylinder 2 is discharged to the air inlet of the air pressure stabilizer 11 through the pipeline (not shown in the figure). At this time, the air input into the air pressure stabilizer 11 makes the piston rod 13 in the air pressure stabilizer 11 descend. The bottom end of the piston rod 13 is movably connected between the roller 16 and the movable rod 15, and the movable rod 15 is movably connected with the connecting rod 12. The connecting rod 12 is fixedly embedded in the inner side of the connecting block 8. The connecting block 8 is fixedly connected between the intermediate block 9 and the base 1. When the piston rod 13 descends, the movable rod 15 rotates on the connecting rod 12 around the pin shaft. When the roller 14 is no longer subjected to the pressure of the plate, the air in the air pressure stabilizer 11 again enters the air cylinder 2 according to the law of high pressure to low pressure, so as to balance the air pressure.

[0033] Working principle: when the mechanism transports the plate, the uneven thickness of the plate will drive the corresponding roller 14 to rise due to the mutual contact between the roller 14 and the plate, and the bearing seat 4 where the roller 14 is arranged will also rise, thereby driving the lever seat 5 connected with the output shaft end of the air cylinder 2 to descend, so that the output shaft of the air cylinder 2 presses down, the air in the air cylinder 2 is pressed into the air pressure stabilizer 11, the excess air in the air cylinder 2 is discharged, so as to maintain the air pressure of the air cylinder 2 stable, and provide stable thrust for the roller 14, thereby facilitating the conveying of the plate.

[0034] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A pneumatic tensioning mechanism, characterized in that: It includes a base (1) and a pneumatic balancing unit. A cylinder (2) is provided at the front end of the base (1). A lever seat (5) is provided at the top end of the output shaft of the cylinder (2). A rotating component is provided between the lever seat (5) and the output shaft of the cylinder (2). The pneumatic balancing unit is used to balance the air pressure of the cylinder (2). The pneumatic balancing unit also includes a connecting rod (12) disposed inside the connecting block (8). One end of the connecting rod (12) is movably connected to a movable rod (15). A piston rod (13) is movably disposed at the end of the movable rod (15) away from the connecting rod (12). A roller (16) is disposed between the piston rod (13) and the connecting rod (12). The lever seat (5) is fixedly connected to a bearing seat (4) at one end of the output shaft away from the cylinder (2), and a rotating shaft (7) is provided between the bearing seat (4) and the base (1); The bearing housing (4) is movably sleeved with a movable shaft (3), and a roller (14) is provided on the outer side of the middle part of the movable shaft (3); Two sets of intermediate blocks (9) are fixedly connected to the outer wall of opposite sides of the base (1), and a connecting block (8) is provided between the two sets of intermediate blocks (9); The rotating component is a bearing (6), and the lever seat (5) and the cylinder (2) are rotatably connected through the bearing (6); A top bracket (10) is fixedly installed on the top outer wall of the base (1); a pneumatic pressure regulator (11) is fixedly installed on the top outer wall of the top bracket (10) at a position corresponding to the piston rod (13).

2. The pneumatic tensioning mechanism according to claim 1, characterized in that: The movable rod (15) and the connecting rod (12) are rotatably connected by a pin.

3. The pneumatic tensioning mechanism according to claim 2, characterized in that: The top of the piston rod (13) is movably sleeved on the inside of the air pressure regulator (11).

4. A pneumatic tensioning mechanism according to claim 3, characterized in that: The air inlet of the air pressure regulator (11) is connected to the air outlet of the cylinder (2) to balance the air pressure of the cylinder (2).

5. A pneumatic tensioning mechanism according to claim 1, characterized in that: The rollers (14) are arranged in multiple sets, and the distance between each pair of adjacent rollers (14) is equal.

6. A pneumatic tensioning mechanism according to claim 1, characterized in that: The outer wall of the roller (14) is uniformly provided with several sets of anti-slip patterns.

7. A pneumatic tensioning mechanism according to claim 1, characterized in that: A gap is provided between the roller (14) and the connecting block (8) to allow the plate to pass through.

8. A pneumatic tensioning mechanism according to claim 1, characterized in that: The lever seat (5) drives the bearing seat (4) to rotate around the rotating shaft (7) as the center.

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