Tension swing adjusting device

Abstract

The utility model discloses a tension swing adjusting device which comprises a swing shaft, a swing arm, a tension roller, an adjusting air cylinder, an air cylinder swing arm and a displacement sensor. The swing shaft is rotatably connected with the rack wall plate; the upper ends of the two swing arms are arranged at the two ends of the swing shaft in a sleeving mode respectively and fixedly connected with the swing shaft, the two ends of a tension roller shaft penetrate through kidney-shaped holes in the lower ends of the swing arms on the two sides respectively and are fixedly connected with the swing arms, and the front end of the air cylinder swing arm is fixedly connected with the left end of the swing shaft. The piston rod is connected with a pin shaft inserted into the rear end of the air cylinder swing arm through a joint bearing; the displacement sensor is arranged on the front side face of the adjusting air cylinder. When the tension of a base material belt changes, the tension roller on the swing arm is driven by the adjusting air cylinder to swing towards the same or opposite conveying direction of the material belt, the tension of the material belt can be effectively maintained to be stable, and the conveying speed of the material belt and the tension of the material belt are automatically adjusted and the swing arm is reset by arranging the displacement sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to a solventless laminating machine technical field especially relates to a tension swing adjusting device for solventless laminating machine. BACKGROUND

[0002] Solventless laminating machine is a method of using solventless adhesive to compound two or more substrates together, also known as reactive lamination. Its main component structure includes: first unwinding unit, coating unit, second unwinding unit, compounding unit, winding unit. Through the process flow: unwinding-coating-compounding-winding, the compounding of two substrates is completed. In this process, the thickness of the base material belt has a certain deviation, and with the accumulation of continuous conveying error, the base material belt will appear tight due to the increase of tension or loose due to the decrease of tension in the conveying process. If the tension change cannot be solved in time, the surface of the base material belt will be pulled or the surface will be uneven, which is easy to wrinkle, uneven coating, unstable compounding quality, and the production efficiency is greatly reduced. Therefore, it is very important to keep the conveying tension of the base material belt stable during the compounding production process of the solventless laminating machine. Therefore, it is necessary to set a tension adjusting device at the unwinding position of the unwinding device and at the position before the coating of the material belt enters the compounding. SUMMARY

[0003] To solve the above technical problems, the utility model provides a tension swing adjusting device, which is provided with a swing shaft, a swing arm, a cylinder swing arm, an adjusting cylinder and a displacement sensor. The tension roller is arranged on the swing arm. When the tension of the base material belt changes, the tension roller on the swing arm is swung towards the material belt conveying in the same or opposite direction by the adjusting cylinder, which can effectively maintain the stability of the material belt tension. By setting the displacement sensor, the material belt conveying speed is automatically adjusted, the material belt tension is adjusted, and the swing arm is reset.

[0004] To achieve the above purpose, the utility model provides a tension swing adjusting device, which comprises two machine frame wall plates arranged side by side on the left and right sides, and further comprises a swing shaft, a swing arm, a tension roller, an adjusting cylinder, a cylinder swing arm and a displacement sensor.

[0005] The swing shaft is horizontally arranged, both ends of which are sleeved with bearing sleeves, and the two bearing sleeves are respectively inserted into the left and right machine frame wall plates. The outer circular surface of the swing shaft is fastened with the inner ring of the deep groove ball bearing in the bearing sleeve, so that the swing shaft is rotatably connected with the left and right machine frame wall plates.

[0006] The tension roller is parallel to the swing shaft and arranged below the swing shaft. The tension roller is provided with a roller shaft.

[0007] The upper end of the swing arm is provided with a first through hole, and the lower end is provided with a longitudinal waist-shaped hole, the swing arm is provided with two parts, the two swing arms are respectively sleeved on the outer circular surface of the two ends of the swing shaft through the first through hole, are arranged on the inner side of the corresponding end bearing sleeve, and are fixedly connected with the swing shaft;

[0008] The width of the waist-shaped hole matches the outer diameter of the two ends of the roller shaft, the roller shaft passes through the waist-shaped holes on the two swing arms, the first threaded holes are arranged on the front and rear sides of the swing arm and correspond to the waist-shaped holes, the first threaded holes are provided with a locking screw, and the end of the locking screw is supported on the corresponding outer circular surface of the roller shaft to lock and fix the two ends of the roller shaft;

[0009] One end of the cylinder swing arm is sleeved on the outer side surface of the left end of the swing shaft, is arranged between the left end bearing sleeve and the swing arm, and is fixedly connected with the swing shaft, the other end of the cylinder swing arm extends rearward, and a pin shaft is inserted into the right side surface of the rearward extending part;

[0010] The adjusting cylinder is arranged above or below the pin shaft, the cylinder body of the adjusting cylinder is fixedly connected with the corresponding side rack wall plate through the cylinder seat shaft, the piston rod of the adjusting cylinder is connected with the pin shaft through the joint bearing, and the adjusting cylinder is connected with the power supply control system;

[0011] The displacement sensor is arranged on the front side of the adjusting cylinder, is used for detecting the displacement information of the piston rod of the adjusting cylinder, and transmits the detection data to the equipment power supply control system;

[0012] In normal operation, the cylinder swing arm is in a horizontal state, the swing arm is in a vertical state, the tension of the material belt on the tension roller is stable, and the material belt is smooth and flat.

[0013] Further, the swing arm is further provided with a second through hole between the first through hole and the waist-shaped hole, and the centers of the first through hole, the second through hole and the waist-shaped hole are arranged on a vertical line;

[0014] The second threaded hole is in threaded connection with a limiting pin, one end of the limiting pin passes through the center of the second through hole, and the diameter of the second through hole is greater than the outer diameter of the corresponding position of the limiting pin by 30±2 mm.

[0015] Further, the limiting pin is sleeved with a buffer sleeve at the end of the second through hole, the buffer sleeve is made of rubber or plastic material, and the diameter of the second through hole is greater than the outer diameter of the buffer sleeve by 30±2 mm.

[0016] Further, the front end of the cylinder swing arm is provided with a third through hole penetrating through the left and right sides, a slit is arranged in the middle of the front end surface of the cylinder swing arm, the slit penetrates through the front and rear inner sides of the third through hole, a bolt hole is arranged on the upper side wall of the slit, a third threaded hole matched with the bolt hole is arranged on the lower side wall, the third through hole is sleeved on the outer circular surface of the swing shaft, the upper and lower side walls of the slit are locked by screwing the bolt through the bolt hole and the third threaded hole, so that the cylinder swing arm is fixedly connected with the swing shaft.

[0017] Further, a fourth threaded hole is arranged on the upper side wall of the slit above the third through hole and communicates with the third through hole, a first locking screw is threadedly connected in the fourth threaded hole, and the end of the first locking screw abuts against the corresponding outer circular surface of the swing shaft, so as to reinforce the fixed connection between the cylinder swing arm and the swing shaft.

[0018] Further, a pin hole is arranged on the rear end of the cylinder swing arm corresponding to the position of the pin shaft, the pin shaft is inserted into the pin hole in interference fit, a fifth threaded hole is arranged on the upper surface of the rear end of the cylinder swing arm above the pin hole and communicates with the pin hole, a second locking screw is threadedly connected in the fifth threaded hole, and the end of the second locking screw abuts against the corresponding outer circular surface of the pin shaft, so as to prevent the pin shaft from loosening.

[0019] Further, a connecting seat plate is fixedly connected on each side surface of the swing arm distal bearing seat, an expansion coupling sleeve is arranged in the connecting seat plate, the expansion coupling sleeve is composed of an open double-tapered inner ring, an open double-tapered outer ring and two double-tapered compression rings sleeved between the double-tapered inner ring and the double-tapered outer ring, the large ends of the two double-tapered compression rings face outward, the small ends face inward, and the two double-tapered compression rings are arranged back to back, the double-tapered inner ring clamps the outer circular surface of the swing shaft by tightening the two double-tapered compression rings with a plurality of circumferentially distributed inner hexagonal bolts, and the double-tapered outer ring expands and tightly connects the inner hole of the connecting seat plate, so that the swing shaft is fixedly connected with the swing arm.

[0020] The utility model discloses a working principle: when working, starting the adjusting cylinder, the piston rod of adjusting cylinder stretches out, and the swing arm is given a swing force opposite to the transmission direction of the base material unwinding material belt through the swing arm of cylinder, and the swing force is level with the transmission tension of material belt, and at this time, the swing arm of cylinder is horizontal, and the swing arm is vertical, and the material belt tension is balanced and stable, so that the material belt is stably transmitted, and the thickness of the material belt of the base material roll exists deviation, and with the continuous delivery of the material belt, the error is accumulated, and the material belt tension is reduced and increased, when the tension is reduced, the swing force of adjusting cylinder is greater than the material belt delivery tension, so that the swing arm swings a certain angle towards the opposite direction of the material belt delivery, so that the material belt is re-tensioned, and the subsequent composite quality is guaranteed, the displacement sensor detects the displacement data of the piston rod of adjusting cylinder in real time on line, and sends the detection data to the power control system, and the power control system sends control instructions to the driving motor of the driving base material belt, improves the motor speed, and increases the material belt transmission tension, until the transmission tension is level with the swing force of adjusting cylinder, and the swing arm returns to the vertical state, on the contrary, when the tension is increased, the swing arm of adjusting cylinder swings a certain angle towards the same direction of the material belt delivery, so that the material belt tension is reduced to the normal value, and the power control system controls the driving motor to slow down according to the detection data, until the swing arm returns to the vertical state.

[0021] Compared with the prior art, the utility model has the advantages that: the utility model discloses a swing shaft, a swing arm, a swing arm of cylinder, an adjusting cylinder and a displacement sensor are arranged, the tension roller is arranged on the swing arm, when the tension of the base material belt changes, the tension roller on the swing arm is swung towards the same or opposite direction of the material belt delivery through the adjusting cylinder, so that the material belt tension can be effectively maintained stable, the stable transmission of the base material belt is guaranteed, the subsequent product composite quality is stable, the displacement sensor is arranged, the material belt transmission speed is automatically adjusted, the material belt tension is adjusted, and the swing arm is reset. ACCURACY OF DRAWINGS

[0022] Figure 1 It is the structural schematic diagram of the utility model embodiment;

[0023] Figure 2 It is the structural schematic diagram of the utility model embodiment limit stop pin;

[0024] Figure 3 It is the structural schematic diagram of the utility model embodiment swing arm of cylinder;

[0025] Figure 4 It is the structural schematic diagram of the utility model embodiment expansion coupling sleeve appearance structure;

[0026] Figure 5 It is the structural schematic diagram of the utility model embodiment expansion coupling sleeve section structure.

[0027] In the figure: 1. Swing shaft, 2. Tension roller, 3. Roller shaft, 4. Swing arm, 401. First through hole, 402. Second through hole, 403. Waist-shaped hole, 404. First threaded hole, 5. Connecting seat plate, 6. Expansion coupling sleeve, 7. Limiting rod, 701. Buffer sleeve, 8. Cylinder swing arm, 801. Third through hole, 802. Slit, 803. Bolt hole, 804. Threaded hole, 805. Pin hole, 806. Threaded hole, 9. Pin shaft, 10. Spherical bearing, 11. Adjusting cylinder, 12. Cylinder seat shaft, 13. Displacement sensor, 14. Bearing sleeve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] like Figure 1 As shown, the embodiment of the present invention includes two frame wall panels (not shown in the figure) arranged side by side on the left and right sides, and also includes a swing shaft 1, a swing arm 4, a tension roller 2, an adjustment cylinder 11, a cylinder swing arm 8 and a displacement sensor 13;

[0030] The swing shaft 1 is arranged horizontally, and bearing sleeves 14 are provided at both ends. The two bearing sleeves 14 are respectively inserted into the left and right side frame wall panels. The outer surface of the swing shaft 1 is fastened to the inner ring of the deep groove ball bearing in the bearing sleeve 14, so that the swing shaft 1 is rotatably connected to the left and right side frame wall panels.

[0031] The tension roller 2 is parallel to the swing shaft 1 and is arranged below the swing shaft 1. A roller shaft 3 is arranged inside the tension roller 2.

[0032] The upper end of the swing arm 4 is provided with a first through hole 401, and the lower end is provided with a longitudinal waist-shaped hole 402. The swing arm 4 is provided with two pieces. The two swing arms 4 are respectively sleeved on the outer circumferential surfaces of the two ends of the swing shaft 1 through the first through holes 401, and are provided on the inner side of the corresponding end bearing sleeve 14 and fixedly connected to the swing shaft 1.

[0033] The width of the waist-shaped hole 402 matches the outer diameter of the two ends of the roller shaft 3. The two ends of the roller shaft 3 pass through the waist-shaped holes 403 on the two side swing arms 4 respectively. The front and rear sides of the swing arms 4 are provided with first threaded holes 404 at positions corresponding to the waist-shaped holes 403. The first threaded holes 404 are provided with set screws. The ends of the set screws are held against the corresponding outer circumferential surfaces of the roller shaft 3 to lock and fix the two ends of the roller shaft.

[0034] In another embodiment, the two ends of the roller shaft 3 are provided with square heads, and the ends of the locking screws are supported on the corresponding side planes of the square heads, so that the roller shaft 3 can be locked more tightly and firmly.

[0035] The cylinder swing arm 8 is sleeved on the outer side surface of the left end of the swing shaft 1, is arranged between the left end bearing sleeve 14 and the swing arm 4, and is fixedly connected with the swing shaft 1. The other end of the cylinder swing arm 8 extends rearward, and the pin shaft 9 is inserted into the right side surface of the rearward extending portion;

[0036] The adjusting cylinder 11 is arranged above or below the pin shaft 9. The cylinder body of the adjusting cylinder 11 is fixedly connected with the corresponding side rack wall through the cylinder seat shaft 12. The piston rod of the adjusting cylinder 11 is connected with the pin shaft 9 through the joint bearing 10. The adjusting cylinder 11 is connected with the power supply control system.

[0037] When the adjusting cylinder is arranged above the pin shaft 9, the piston rod of the adjusting cylinder 11 extends downward, drives the cylinder swing arm 8 to swing downward in the clockwise direction, and drives the swing arm 4 to swing leftward in the clockwise direction. At this time, the conveying direction of the material belt on the tension roller 2 is rightward conveying. That is, when the conveying direction of the material belt on the tension roller 2 is rightward conveying, the adjusting cylinder is arranged above the pin shaft 9.

[0038] When the adjusting cylinder is arranged below the pin shaft 9, the piston rod of the adjusting cylinder 11 extends upward, drives the cylinder swing arm 8 to swing upward in the counterclockwise direction, and drives the swing arm 4 to swing rightward in the counterclockwise direction. At this time, the conveying direction of the material belt on the tension roller 2 is leftward conveying. That is, when the conveying direction of the material belt on the tension roller 2 is leftward conveying, the adjusting cylinder is arranged below the pin shaft 9.

[0039] The displacement sensor 13 is arranged on the front side surface of the adjusting cylinder 11, is used for detecting the displacement information of the piston rod of the adjusting cylinder, and transmits the detection data to the equipment power supply control system.

[0040] In normal operation, the cylinder swing arm 8 is in a horizontal state, the swing arm 4 is in a vertical state, the tension of the material belt on the tension roller 2 is stable, the material belt is smoothly and stably conveyed, and the material belt is smooth and flat.

[0041] The working mode of the embodiment is as follows: the adjusting cylinder 11 is started, the piston rod of the adjusting cylinder 11 is extended, the swing arm 4 is given a swing force opposite to the conveying direction of the base material strip by the cylinder swing arm 8, the swing force is balanced with the conveying tension of the strip, at this time, the cylinder swing arm 8 is in a horizontal state, the swing arm 4 is in a vertical state, the strip tension is balanced and stable, the strip is conveyed smoothly, and the thickness of the strip of the base material roll has an error which is accumulated with the continuous conveying of the strip. When the base material strip is relaxed and the tension is reduced, the swing force applied by the adjusting cylinder 11 is greater than the conveying tension of the strip, the swing arm 4 swings to a certain angle in the opposite direction of the strip conveying, the strip is tensioned again, the strip tension can be effectively maintained stable, the stable conveying of the base material strip is ensured, the quality stability of the subsequent product compounding is ensured, the displacement sensor 13 detects the displacement data of the piston rod of the adjusting cylinder 11 in real time and sends the detection data to the power control system, the power control system sends a control instruction to the driving motor for driving the conveying of the base material strip, the motor speed is increased, the strip conveying tension is increased, until the conveying tension is balanced with the swing force applied by the adjusting cylinder 11, and the swing arm 4 returns to the vertical state; when the tension of the base material strip increases, the swing force applied by the adjusting cylinder 11 is less than the conveying tension of the strip, the swing arm 4 swings to a certain angle in the same direction of the strip conveying, the strip tension is reduced, the strip tension can be effectively maintained stable, the stable conveying of the base material strip is ensured, the quality stability of the subsequent product compounding is ensured, the displacement sensor 13 detects the displacement data of the piston rod of the adjusting cylinder 11 in real time and sends the detection data to the power control system, the power control system sends a control instruction to the driving motor for driving the conveying of the base material strip, the motor speed is reduced, the strip conveying tension is reduced, until the conveying tension is balanced with the swing force applied by the adjusting cylinder 11, and the swing arm 4 returns to the vertical state.

[0042] Further, as shown in Figure 1 the second through hole 402 is arranged between the first through hole 401 and the waist-shaped hole 403 on the swing arm 4, and the centers of the first through hole 401, the second through hole 402 and the waist-shaped hole 403 are arranged on a vertical line;

[0043] second threaded holes corresponding to the second through hole 402 are arranged on the two side frame walls, and a limiting pin 7 is threadedly connected in the second threaded hole, one end of the limiting pin 7 passes through the center of the second through hole 402, and the diameter of the second through hole 402 is greater than the outer diameter of the corresponding position of the limiting pin 7, that is, 30±2mm.

[0044] The limiting pin 7 is arranged to limit the swing amplitude of the swing arm 4, so as to prevent the piston rod from having an excessively large extension / retraction stroke and causing production failure when the adjusting cylinder 11 fails.

[0045] Further, as shown in Figure 2As shown, a buffer sleeve 701 is provided on the outer side of the end of the limiting pin 7 passing through the second through hole 402. The buffer sleeve 701 is made of rubber or plastic. The aperture of the second through hole 402 is 30±2 mm larger than the outer diameter of the buffer sleeve 701.

[0046] The buffer sleeve 701 is provided to reduce the impact when the swing arm swings, thereby increasing the service life of this embodiment.

[0047] Further, such as Figure 1 、 Figure 3 As shown, the front end of the cylinder swing arm 8 is provided with a third through hole 801 which passes horizontally through the left and right sides, and a slit 802 is provided in the middle of the front end surface of the cylinder swing arm 8. The slit 802 passes through the front and rear inner sides of the third through hole 801, and a bolt hole 803 is provided on the upper side wall of the slit 802, and a matching third threaded hole is provided on the lower side wall. The third through hole 801 is sleeved on the outer circular surface of the swing shaft 1, and the upper and lower side walls of the slit 802 pass through the bolt hole 803 with bolts, and are threadedly connected and locked with the third threaded hole, so that the cylinder swing arm 8 is fixedly connected to the swing shaft 1.

[0048] Further, such as Figure 3 As shown, a fourth threaded hole 804 is provided on the upper side wall of the slit 802 just above the third through hole 801 and is connected to the third through hole 801. The fourth threaded hole 804 is internally threaded with a first locking screw, and the end of the first locking screw is tightened against the corresponding outer circular surface of the swing shaft 1 to prevent the cylinder swing arm 8 from rotating and moving relative to the swing shaft 1.

[0049] Further, such as Figure 3 As shown, a pin hole 805 is provided at a position corresponding to the rear end of the cylinder swing arm 8 and the pin shaft 9, and one end of the pin shaft 9 is inserted in the pin hole 805 with an interference fit. A fifth threaded hole is also provided on the upper plane of the rear end of the cylinder swing arm 8 directly above the pin hole 805 and connected to the pin hole 805. The inner thread of the fifth threaded hole is connected to a second locking screw, and the end head of the second locking screw is held on the corresponding outer cylindrical surface of the pin shaft 9 to prevent the pin shaft 9 from loosening.

[0050] Further, such as Figure 1 、 Figure 4 、 Figure 5 As shown, the side surfaces of the swing arm 4 far from the bearing seat 14 are fixedly connected with a connecting seat plate 5, and an expansion coupling sleeve 6 is provided in the connecting seat plate 5. The expansion coupling sleeve 6 consists of an open double-cone inner ring 601, an open double-cone outer ring 602 and two double-cone clamping rings 603 arranged between the double-cone inner ring 601 and the double-cone outer ring 602. The large ends of the two double-cone clamping rings 603 face outwards and the small ends face inwards. They are arranged back to back. The two double-cone clamping rings 603 are tightened with a plurality of hexagon socket bolts uniformly distributed around the circumference, so that the double-cone inner ring 601 clamps the outer cylindrical surface of the swing shaft 1, and the double-cone outer ring 602 expands the inner hole of the connecting seat plate 5, so that the swing shaft 1 is fixedly connected to the swing arm 4.

[0051] The above are only preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. A tension swing adjustment device comprising two frame wall panels arranged side by side on the left and right sides, characterized in that: It also includes a swing shaft, a swing arm, a tension roller, an adjustment cylinder, a cylinder swing arm and a displacement sensor; The swing shaft is arranged horizontally, and bearing sleeves are provided at both ends. The two bearing sleeves are respectively inserted into the left and right frame wall panels. The outer surface of the swing shaft is fastened to the inner ring of the deep groove ball bearing in the bearing sleeve, so that the swing shaft is rotatably connected to the left and right frame wall panels. The tension roller is parallel to the swing shaft and is arranged below the swing shaft, and a roller shaft is arranged inside the tension roller; The upper end of the swing arm is provided with a first through hole, and the lower end is provided with a longitudinal waist-shaped hole. The swing arm is provided with two pieces, and the two swing arms are respectively sleeved on the outer circumferential surfaces of the two ends of the swing shaft through the first through holes, and are provided on the inner side of the corresponding end bearing sleeves and fixedly connected to the swing shaft; The width of the waist-shaped hole matches the outer diameter of both ends of the roller shaft. Both ends of the roller shaft pass through the waist-shaped holes on the swing arms on both sides respectively. First threaded holes are provided on the front and rear sides of the swing arms at positions corresponding to the waist-shaped holes. Set screws are provided in the first threaded holes. The ends of the set screws are held on the corresponding outer circumferential surfaces of the roller shaft to lock and fix the two ends of the roller shaft. One end of the cylinder swing arm is sleeved on the outer surface of the left end of the swing shaft, is arranged between the left end bearing sleeve and the swing arm, and is fixedly connected to the swing shaft. The other end of the cylinder swing arm extends rearward, and a pin is inserted into the right side surface of the rearward extension; The regulating cylinder is arranged just above or just below the pin shaft, the regulating cylinder body is fixedly connected to the corresponding side frame wall plate through the cylinder seat shaft, the regulating cylinder piston rod is connected to the pin shaft through the joint bearing, and the regulating cylinder is connected to the power supply control system; The displacement sensor is provided on the front side of the regulating cylinder and is used to detect the displacement information of the regulating cylinder piston rod and transmit the detection data to the equipment power control system; During normal operation, the cylinder swing arm is in a horizontal state, the swing arm is in a vertical state, and the tension of the material belt on the tension roller is stable, so that the material belt is smooth and flat.

2. A tension swing adjustment device according to claim 1, characterized in that: The swing arm is provided with a second through hole between the first through hole and the waist-shaped hole, and the centers of the first through hole, the second through hole and the waist-shaped hole are arranged on a vertical line; A second threaded hole is provided on the rack wall panels on both sides at positions corresponding to the second through holes. The inner threads of the second threaded holes are connected to a limit pin. The other end of the limit pin passes through the center of the second through hole. The diameter of the second through hole is 30±2mm larger than the outer diameter of the position corresponding to the limit pin.

3. The tension swing adjustment device according to claim 2, characterized in that: The limiting pin passes through the outer side of the second through hole and is covered with a buffer sleeve, the buffer sleeve is made of rubber or plastic material, and the aperture of the second through hole is 30±2mm larger than the outer diameter of the buffer sleeve.

4. The tension swing adjustment device according to claim 1, characterized in that: The front end of the cylinder swing arm is provided with a third through hole which passes horizontally through the left and right sides, and a slit is provided in the middle of the front end surface of the cylinder swing arm, and the slit passes through the front and rear inner sides of the third through hole, and a bolt hole is provided on the upper side wall of the slit, and a matching third threaded hole is provided on the lower side wall, and the third through hole is sleeved on the outer circular surface of the swing shaft, and the upper and lower side walls of the slit pass through the bolt holes with bolts, and are threadedly connected and locked with the third threaded hole, so that the cylinder swing arm is fixedly connected to the swing shaft.

5. The tension swing adjustment device according to claim 4, characterized in that: A fourth threaded hole is provided on the upper side wall of the slit, directly above the third through hole, and is connected to the third through hole. A first locking screw is threadedly connected to the inner thread of the fourth threaded hole, and the end of the first locking screw is tightened against the corresponding outer circular surface of the swing shaft to strengthen the fixed connection between the cylinder swing arm and the swing shaft.

6. The tension swing adjustment device according to claim 1, characterized in that: A pin hole is provided at a position corresponding to the rear end of the cylinder swing arm and the pin shaft, and one end of the pin shaft is inserted in the pin hole with an interference fit. A fifth threaded hole is also provided on the upper plane of the rear end of the cylinder swing arm directly above the pin hole and connected to the pin hole. A second locking screw is connected to the inner thread of the fifth threaded hole, and the end head of the second locking screw is held on the corresponding outer cylindrical surface of the pin shaft to prevent the pin shaft from loosening.

7. The tension swing adjustment device according to claim 1, characterized in that: The side surfaces of the far bearing seat of the swing arm are fixedly connected with a connecting seat plate, and an expansion coupling sleeve is provided in the connecting seat plate. The expansion coupling sleeve consists of an open double-cone inner ring, an open double-cone outer ring and two double-cone pressure rings sleeved between the double-cone inner ring and the double-cone outer ring. The large ends of the two double-cone pressure rings face outwards and the small ends face inwards, and they are arranged back to back. The two double-cone pressure rings are tightened with a plurality of hexagon socket bolts evenly distributed around the circumference, so that the double-cone inner ring clamps the outer cylindrical surface of the swing shaft, and the double-cone outer ring expands the inner hole of the connecting seat plate, so that the swing shaft is fixedly connected to the swing arm.

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