A coaxiality calibration device for a paper roll conveying shaft before assembly

Abstract

The utility model belongs to the transmission shaft calibration technical field discloses a kind of paper roll transmission shaft assembly before coaxiality calibration device, including base and two moving seats, the top of moving seat is fixedly connected with fixed sleeve, the both ends of the outer wall of fixed sleeve are rotatably connected with rotating ring, fixed sleeve's both sides and the side of two rotating rings are rotatably connected with four mounting blocks respectively, in the utility model, through the fixed sleeve of moving seat top, its outer wall rotatably connected rotating ring, and linkage mounting block and clamping rod constitute open type clamping frame, clamping rod is realized opening and closing action by mounting block, without being placed into transmission shaft from single direction horizontally, long specification paper roll transmission shaft can be directly placed in clamping area, then rotating ring is driven by cylinder to drive clamping rod clamping shaft body, avoid the problem that calibration cannot be carried out due to the length of shaft body exceeding equipment range.

Description

Technical Field

[0001] This utility model relates to the field of conveyor shaft calibration technology, specifically to a coaxiality calibration device for a paper roll conveyor shaft before assembly. Background Technology

[0002] In paper roll production and processing equipment, the paper roll conveyor shaft is the core component for stable paper roll transmission. Its coaxiality accuracy directly affects the flatness and tension stability of the paper roll during transmission. If the coaxiality is not up to standard, it can easily lead to paper roll wrinkles, misalignment, or even breakage, thus affecting product quality and production efficiency. Therefore, before assembling the paper roll conveyor shaft, its coaxiality must be strictly calibrated to ensure that it meets the equipment assembly accuracy requirements.

[0003] Chinese Patent Publication No. CN221147577U discloses a concentricity calibration device for shaft components, including a base plate. A second motor is fixedly connected to the rear right side of the base plate. A bidirectional threaded rod is fixedly connected to the output end of the second motor. Sliding blocks are threadedly connected to both outer circumferences of the bidirectional threaded rod. A connecting rod is fixedly connected to the front of the base plate. Limiting blocks are slidably connected to both sides of the connecting rod. Support columns are fixedly connected to the upper parts of the two sliding blocks and the limiting blocks. A fixed column is fixedly connected to the upper part of the left support column, and a sliding column is slidably connected inside the right support column.

[0004] In practical use, the existing technology uses a closed structure with clamping at both ends, and the clamping components cannot penetrate. Shaft components must be inserted horizontally from one end of the clamping components. If the length of the paper roll conveyor shaft exceeds the length of the base plate, the two ends of the shaft cannot be clamped by the fixed column and the sliding column at the same time, which makes it impossible for the device to position the long conveyor shaft and thus impossible to carry out calibration work. Based on this, this utility model designs a coaxiality calibration device for paper roll conveyor shaft before assembly to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a coaxiality calibration device for the paper roll conveyor shaft before assembly.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A coaxiality calibration device for a paper roll conveyor shaft before assembly includes a base and two movable seats. A fixed sleeve is fixedly connected to the top of the movable seats. Rotating rings are rotatably connected to both ends of the outer wall of the fixed sleeve. A synchronizing rod is fixedly connected between the two rotating rings. Four mounting blocks are rotatably connected to both sides of the fixed sleeve and one side of the two rotating rings, respectively. Clamping rods are fixedly connected to the two mounting blocks at the fixed sleeve and the two mounting blocks at the rotating rings.

[0007] Furthermore, the outer walls of all four clamping rods are slidably connected to the mounting block, which is not fixedly connected to the ends of the clamping rods.

[0008] Furthermore, a connecting rod is fixedly connected between the outer walls of the two rotating rings, and a cylinder is rotatably connected to the outer wall of the movable seat. The output end of the cylinder is rotatably connected to the outer wall of the connecting rod.

[0009] Furthermore, a bidirectional screw is rotatably connected to the middle of the base, and the two movable seats are respectively threaded to the two sides of the outer wall of the bidirectional screw. The two movable seats and the base are slidably connected.

[0010] Furthermore, a No. 1 motor is fixedly connected to the outside of the base, and the output end of the No. 1 motor is fixedly connected to one end of the bidirectional screw.

[0011] Furthermore, the base is internally rotatably connected to a threaded rod, and the outer wall of the threaded rod is threadedly connected to a movable block, which is slidably connected to the base.

[0012] Furthermore, a second motor is fixedly connected to the outside of the base, and the output end of the second motor is fixedly connected to one end of the threaded rod.

[0013] Furthermore, a fixed rod is fixedly connected above the movable block, and a lifting block is slidably connected to the outer wall of the fixed rod. A fastening bolt is installed on one side of the lifting block.

[0014] Furthermore, a telescopic rod is rotatably connected to one side of the lifting block, and there is damping at the connection between the telescopic rod and the lifting block.

[0015] Furthermore, a dial indicator is installed at the output end of the telescopic rod, and a probe is installed on one side of the dial indicator.

[0016] Beneficial effects 1. In this utility model, an open clamping frame is formed by a fixed sleeve fixed above the movable seat, a rotating ring rotatably connected to its outer wall, and a linkage mounting block and clamping rod. The clamping rod achieves opening and closing action through the mounting block. It is not necessary to put the conveyor shaft horizontally from a single direction. The long roll paper conveyor shaft can be directly placed in the clamping area. Then, the rotating ring is driven by the cylinder to drive the clamping rod to clamp the shaft, avoiding the problem of calibration failure due to the shaft length exceeding the equipment range.

[0017] 2. In this utility model, the No. 2 motor drives the threaded rod to make the moving block slide horizontally, thereby realizing the position adjustment of the dial indicator along the length of the transmission shaft; the sliding of the lifting block along the fixed rod, combined with the locking of the fastening bolt, can adapt to the vertical detection requirements of transmission shafts of different diameters; the angle damping adjustment and length extension function of the telescopic rod can flexibly adjust the tilt angle and detection distance of the dial indicator to ensure that the probe is stably attached to the surface of the transmission shaft.

[0018] 3. In this utility model, the cylinder drives the rotating ring to rotate, and combined with the synchronous action of the synchronizing rod, the four clamping rods open and close in conjunction with the mounting block to achieve multi-point clamping of the transmission shaft. This linkage clamping structure avoids the transmission shaft from shifting or shaking during the testing process, provides a unified and stable benchmark for coaxiality testing, and reduces testing errors caused by positioning deviations. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the base in this utility model; Figure 3 for Figure 2 Enlarged structural diagram of region A in the middle; Figure 4 This is a schematic diagram of the clamping component of this utility model; Figure 5 This is a schematic diagram showing the connection relationship between the fixed sleeve and the rotating ring in this utility model; Figure 6 This is a partial structural diagram of the present invention.

[0021] The labels in the diagram represent: 1. Base; 11. Bidirectional screw; 12. Motor No. 1; 13. Threaded rod; 14. Motor No. 2; 15. Moving block; 16. Fixed rod; 17. Lifting block; 18. Fastening bolt; 19. Telescopic rod; 2. Dial indicator; 21. Probe; 22. Moving seat; 23. Fixed sleeve; 24. Rotating ring; 25. Synchronizing rod; 26. Connecting rod; 27. Mounting block; 28. Clamping rod; 29. ​​Cylinder. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] The present invention will be further described below with reference to the embodiments.

[0024] In some embodiments, please refer to the appendix to the instruction manual. Figures 1-6 A coaxiality calibration device for a paper roll conveyor shaft before assembly includes a base 1 and two movable seats 22. A fixed sleeve 23 is fixedly connected to the top of the movable seats 22. Rotating rings 24 are rotatably connected to both ends of the outer wall of the fixed sleeve 23. A synchronizing rod 25 is fixedly connected between the two rotating rings 24. Four mounting blocks 27 are rotatably connected to both sides of the fixed sleeve 23 and one side of the two rotating rings 24, respectively. Clamping rods 28 are fixedly connected to the two mounting blocks 27 at the fixed sleeve 23 and the two mounting blocks 27 at the rotating rings 24. The outer walls of the four clamping rods 28 are slidably connected to the mounting blocks 27 that are not fixedly connected to the ends of the clamping rods 28. A connecting rod 26 is fixedly connected between the outer walls of the two rotating rings 24. A cylinder 29 is rotatably connected to the outer wall of the movable seat 22. The output end of the cylinder 29 is rotatably connected to the outer wall of the connecting rod 26.

[0025] In this embodiment, the fixed sleeve 23 fixed above the movable seat 22 serves as the core support component. The rotating rings 24 rotatably connected to both ends of its outer wall rotate synchronously through the synchronizing rod 25, effectively avoiding the clamping imbalance problem caused by the offset of a single rotating ring 24. At the same time, four mounting blocks 27 rotatably connected to both sides of the fixed sleeve 23 and one side of the two rotating rings 24 respectively form a linkage structure with the corresponding fixed clamping rods 28. The outer walls of the four clamping rods 28 are all slidably engaged with the mounting blocks 27 that are not connected to the ends. This design allows the clamping rods 28 to maintain multi-point contact with the paper conveying shaft during the opening and closing process. Compared with the traditional single-point or two-point clamping method, this multi-directional clamping structure can firmly fix the conveying shaft at the preset calibration center, greatly reducing the probability of the conveying shaft shaking or offset during the calibration process, and providing a stable and accurate benchmark for subsequent coaxiality testing. In actual production, the diameter and length specifications of the paper roll conveyor shaft vary. Traditional calibration devices often require frequent replacement of special fixtures due to the fixed clamping range, which not only increases production costs but also reduces work efficiency. In this device, the connecting rod 26 fixed between the outer walls of the rotating ring 24 is linked to the output end of the cylinder 29 rotatably connected to the outer wall of the moving seat 22. When the cylinder 29 extends or retracts, it can drive the two rotating rings 24 to rotate synchronously through the connecting rod 26, thereby driving the four mounting blocks 27 to drive the clamping rod 28 to achieve flexible adjustment of the opening and closing angle. By controlling the extension and retraction of the cylinder 29, the size of the clamping space formed by the clamping rod 28 can be precisely adjusted, which can be adapted to paper roll conveyor shafts with a wide range of diameters. The clamping and calibration of conveyor shafts of different specifications can be completed without changing the fixture.

[0026] In some embodiments, please refer to the appendix to the instruction manual. Figures 1-6 A coaxiality calibration device for a paper roll conveyor shaft before assembly is disclosed. A bidirectional screw 11 is rotatably connected to the middle of a base 1. Two movable seats 22 are threadedly connected to the lower sides of the outer wall of the bidirectional screw 11, respectively. The two movable seats 22 are slidably connected to the base 1. A first motor 12 is fixedly connected to the outside of the base 1. The output end of the first motor 12 is fixedly connected to one end of the bidirectional screw 11. A threaded rod 13 is rotatably connected inside the base 1. A movable block 15 is threadedly connected to the outer wall of the threaded rod 13. The movable block 15 is slidably connected to the base 1. Next, a second motor 14 is fixedly connected to the outside of the base 1. The output end of the second motor 14 is fixedly connected to one end of the threaded rod 13. A fixed rod 16 is fixedly connected above the moving block 15. A lifting block 17 is slidably connected to the outer wall of the fixed rod 16. A fastening bolt 18 is installed on one side of the lifting block 17. A telescopic rod 19 is rotatably connected to one side of the lifting block 17. There is damping at the connection between the telescopic rod 19 and the lifting block 17. A dial indicator 2 is installed at the output end of the telescopic rod 19. A probe 21 is installed on one side of the dial indicator 2.

[0027] In this embodiment, the bidirectional screw 11 rotatably connected to the middle of the base 1 has its outer walls threadedly connected to the lower sides of the two movable seats 22 respectively, and the movable seats 22 are slidably engaged with the base 1. The output end of the No. 1 motor 12 fixed to the outside of the base 1 is fixed to one end of the bidirectional screw 11. Starting the No. 1 motor 12 can drive the bidirectional screw 11 to rotate, thereby driving the two movable seats 22 to move closer or further away from the base 1 synchronously. By controlling the rotation direction and number of rotations of the No. 1 motor 12, the distance between the two movable seats 22 can be adjusted to meet the clamping requirements of paper roll conveyor shafts of different lengths without the need to replace the base or related components of the movable seats. The threaded rod 13 is rotatably connected inside the base 1, and its outer wall is threadedly connected to the moving block 15. The moving block 15 is slidably engaged with the base 1. The output end of the second motor 14 fixed outside the base 1 is fixed to one end of the threaded rod 13. Starting the second motor 14 can drive the threaded rod 13 to rotate, causing the moving block 15 to slide along the length of the base 1. The fixed rod 16 fixed above the moving block 15 carries the related structure of the dial indicator 2. When the moving block 15 moves, it can drive the dial indicator 2 to move horizontally synchronously, allowing the probe 21 on one side of the dial indicator 2 to contact different positions of the transmission shaft, completing the coaxiality test of the entire length of the transmission shaft without the need for manual handling of the dial indicator 2 to adjust its position.

[0028] The outer wall of the fixed rod 16 slides with the lifting block 17. The fastening bolt 18 installed on one side of the lifting block 17 can lock the position of the lifting block 17. Loosening the fastening bolt 18 allows the lifting block 17 to slide up and down along the fixed rod 16, thereby adjusting the height of the telescopic rod 19 rotatably connected to the lifting block 17. Ultimately, this changes the height of the dial indicator 2 installed at the output end of the telescopic rod 19. By adjusting the position of the lifting block 17, the probe 21 of the dial indicator 2 can contact the outer circle of the transmission shaft with different diameters, meeting the testing requirements of transmission shafts of different specifications. The telescopic rod 19, which is rotatably connected to one side of the lifting block 17, has damping at its connection point. When the telescopic rod 19 is rotated, it can be fixed at the required angle without the need for an additional locking structure. At the same time, stretching or retracting the telescopic rod 19 can change the distance between the dial indicator 2 and the transmission shaft. By adjusting the angle and length of the telescopic rod 19, the probe 21 of the dial indicator 2 can be made to contact the surface of the transmission shaft in a suitable posture, avoiding the probe 21 from failing to make contact or making unstable contact due to improper angle or distance, thus ensuring the smooth progress of the testing process.

[0029] Working principle: Start the No. 1 motor 12 fixed on the outside of the base 1. Its output end drives the bidirectional screw 11 connected to the middle of the base 1 to rotate. Since the two moving seats 22 are respectively threaded to the two sides of the outer wall of the bidirectional screw 11, and the moving seats 22 are slidably engaged with the base 1, when the bidirectional screw 11 rotates, it will drive the two moving seats 22 to move closer or further away from the base 1 synchronously until the distance between the two moving seats 22 matches the length of the transmission shaft to be calibrated. Then, turn off the No. 1 motor 12.

[0030] The cylinder 29, which is rotatably connected to the outer wall of the movable seat 22, is activated. Its output end pushes the connecting rod 26, which is fixed to the outer wall of the rotating ring 24, so that the rotating rings 24, which are rotatably connected to both ends of the outer wall of the fixed sleeve 23, rotate synchronously. The synchronizing rod 25 ensures that the two rotating rings 24 move in unison. When the rotating ring 24 rotates, it drives the mounting block 27, which is rotatably connected to one side of it, and links the mounting blocks 27 on both sides of the fixed sleeve 23. This causes the clamping rods 28, which are connected to the four mounting blocks 27 respectively, to open and close synchronously. The clamping rods 28 slide with the mounting blocks 27 that are not connected to the ends, ensuring that the opening and closing trajectory is stable. The transmission shaft to be calibrated is placed between the four clamping rods 28, and the cylinder 29 is retracted in the reverse direction, so that the clamping rods 28 clamp the transmission shaft, completing the positioning. Start the second motor 14 fixed outside the base 1. Its output end drives the threaded rod 13 rotatably connected inside the base 1 to rotate. The moving block 15, which is threaded on the outer wall of the threaded rod 13, slides with the base 1 as the threaded rod 13 rotates along the length of the base 1. This causes the fixed rod 16 fixed above the moving block 15 and the subsequent connecting structure to move horizontally, so that the dial indicator 2 installed at the output end of the telescopic rod 19 moves to the vicinity of the detection point at one end of the transmission shaft. Then, turn off the second motor 14. Loosen the fastening bolts 18 installed on one side of the lifting block 17, slide the lifting block 17 which is slidably connected to the fixed rod 16 up and down along the outer wall of the fixed rod 16 until the height of the telescopic rod 19 which is rotatably connected to the lifting block 17 is adapted to the diameter of the transmission shaft to be tested, that is, the probe 21 on the side of the dial indicator 2 can contact the outer circle of the transmission shaft. Then tighten the fastening bolts 18 to lock the position of the lifting block 17. The damping at the connection of the telescopic rod 19 connected to one side of the rotating lifting block 17 ensures that the angle can be fixed after rotation, and the tilt angle of the dial indicator 2 is adjusted; at the same time, the telescopic rod 19 is stretched or contracted to change the distance between the dial indicator 2 and the transmission shaft until the probe 21 is tightly attached to the outer surface of the transmission shaft, thus completing the adjustment of the position of the dial indicator 2.

[0031] The positioned transmission shaft is slowly rotated manually or through an external drive structure. The radial deviation of the outer surface of the transmission shaft is transmitted to dial indicator 2 through probe 21, causing the pointer of dial indicator 2 to deflect. During one rotation of the transmission shaft, the difference between the maximum and minimum readings of dial indicator 2 is recorded. If the difference is within the preset qualified range, it means that the coaxiality of the transmission shaft meets the assembly requirements. If the difference exceeds the range, the transmission shaft needs to be calibrated and adjusted according to the reading feedback of dial indicator 2 until the difference meets the standard, thus completing the entire coaxiality calibration work.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A coaxiality calibration device for a paper roll conveyor shaft before assembly, comprising a base (1) and two movable seats (22), characterized in that: A fixed sleeve (23) is fixedly connected above the movable seat (22). Rotating rings (24) are rotatably connected to both ends of the outer wall of the fixed sleeve (23). A synchronizing rod (25) is fixedly connected between the two rotating rings (24). Four mounting blocks (27) are rotatably connected to both sides of the fixed sleeve (23) and one side of the two rotating rings (24). Clamping rods (28) are fixedly connected to the two mounting blocks (27) at the fixed sleeve (23) and the two mounting blocks (27) at the rotating rings (24).

2. The coaxiality calibration device for the paper roll conveyor shaft before assembly according to claim 1, characterized in that, The outer walls of the four clamping rods (28) are slidably connected to the mounting block (27) which is fixedly connected to the end of the non-clamping rod (28).

3. The coaxiality calibration device for a paper roll conveyor shaft before assembly according to claim 2, characterized in that, A connecting rod (26) is fixedly connected between the outer walls of the two rotating rings (24), and a cylinder (29) is rotatably connected to the outer wall of the movable seat (22). The output end of the cylinder (29) is rotatably connected to the outer wall of the connecting rod (26).

4. The coaxiality calibration device for a paper roll conveyor shaft before assembly according to claim 1, characterized in that, The base (1) is rotatably connected to a bidirectional screw (11) in the middle. The two movable seats (22) are threaded to the two sides of the outer wall of the bidirectional screw (11) respectively. The two movable seats (22) and the base (1) are slidably connected.

5. The coaxiality calibration device for the paper roll conveyor shaft before assembly according to claim 4, characterized in that, A No. 1 motor (12) is fixedly connected to the outside of the base (1), and the output end of the No. 1 motor (12) is fixedly connected to one end of the bidirectional screw (11).

6. The coaxiality calibration device for a paper roll conveyor shaft before assembly according to claim 1, characterized in that, The base (1) is rotatably connected to a threaded rod (13), and the outer wall of the threaded rod (13) is threadedly connected to a movable block (15), which is slidably connected to the base (1).

7. The coaxiality calibration device for a paper roll conveyor shaft before assembly according to claim 6, characterized in that, The base (1) is externally fixedly connected to a second motor (14), and the output end of the second motor (14) is fixedly connected to one end of the threaded rod (13).

8. The coaxiality calibration device for the paper roll conveyor shaft before assembly according to claim 7, characterized in that, A fixed rod (16) is fixedly connected above the movable block (15), and a lifting block (17) is slidably connected to the outer wall of the fixed rod (16). A fastening bolt (18) is installed on one side of the lifting block (17).

9. The coaxiality calibration device for a paper roll conveyor shaft before assembly according to claim 8, characterized in that, A telescopic rod (19) is rotatably connected to one side of the lifting block (17), and there is damping at the connection between the telescopic rod (19) and the lifting block (17).

10. A coaxiality calibration device for a paper roll conveyor shaft before assembly according to claim 9, characterized in that, A dial indicator (2) is installed at the output end of the telescopic rod (19), and a probe (21) is installed on one side of the dial indicator (2).

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