A shaft puller anti-slip and stabilizing structure
By introducing a bushing, lead screw, servo motor, and double pin locking structure into the shaft pulling device, the problems of insufficient traction stability and connection reliability of existing shaft pulling devices are solved, and efficient and safe shaft pulling operation is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TAISON(JIANGXI)HOUSEHOLD PROD CO LTD
- Filing Date
- 2025-09-01
- Publication Date
- 2026-06-30
AI Technical Summary
Existing shaft pulling devices have poor stability and insufficient connection reliability during traction, posing safety hazards, especially when pulling shafts under heavy loads, which can easily lead to slippage and damage to the roll material.
The drive assembly consists of a bushing, lead screw, servo motor and pulley, which, together with the guide sleeve, guide groove, telescopic rod and connecting rod, forms a double-sided parallel guide mechanism. The rigid connection between the sleeve and the shaft is achieved by a double pin locking structure, and the servo motor is used to precisely control the shaft pulling speed and torque.
It significantly improves the smoothness and reliability of the shaft pulling process, prevents shaft bending, jamming and damage to the end face of the roll material, reduces the risk of slippage, and improves operational safety and equipment versatility.
Smart Images
Figure CN224429629U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of shaft puller technology, and in particular to a shaft puller anti-slip and stable structure. Background Technology
[0002] In the production of roll products such as paper, toilet paper, and film, after coating, slitting, or rewinding, the finished product is usually wound onto a central core by a winding mechanism to form a roll with a certain diameter and weight for subsequent storage, transportation, and further processing. In subsequent processes, to achieve roll changing, sleeve replacement, or core recycling, the core often needs to be smoothly and completely pulled out of the roll product. This process is called core pulling. Since roll products usually have a large mass and inertia, and there is a certain friction and interference between the core and the inner hole of the roll, core pulling places high demands on the stability, centering, and anti-slip performance of the equipment.
[0003] Patent CN212798889U discloses a paper roller shaft sleeve removal device. This device includes a leveling cart, a support, a plastic sleeve, a rope transmission mechanism, and a motor-driven winch system. Its operation is as follows: the rewound toilet paper roll is placed on the leveling cart; the plastic sleeve to be used is installed on the support; one end of the rope is connected to the shaft core, and the other end is connected to the motor winch; a baffle restricts the axial movement of the paper roller; a window structure prevents the old sleeve inside the roll from being carried out with the shaft core; after the motor is started, the winch pulls the rope, causing the shaft core to be pulled out of the paper roller. Simultaneously, the shaft core is inserted into the new plastic sleeve on the support, realizing the integrated operation of shaft removal and sleeve replacement. This device improves the automation level and production efficiency of shaft removal to a certain extent and reduces manual intervention. However, there are still some shortcomings in actual application. The device uses a rope traction method. The rope is prone to elastic elongation or deviation during the force process, resulting in uneven traction force, which can easily cause shaft core skew, damage to the end face of the roll material, or shaft removal jamming. In addition, the connection between the rope and the shaft core is flexible and has low bonding strength. There is a risk of slippage when removing the shaft under heavy load, which poses a safety hazard.
[0004] Therefore, there is an urgent need to provide a shaft puller anti-slip stabilizing structure that improves traction stability and connection reliability. Utility Model Content
[0005] In order to overcome the shortcomings of poor stability and insufficient connection reliability of the shaft pulling device in the existing patent, this utility model provides a shaft pulling device anti-slip stabilizing structure with improved traction stability and connection reliability.
[0006] To address the aforementioned problems, this utility model adopts the following technical solution: a shaft puller anti-slip and stabilizing structure, comprising a frame, multiple rollers mounted on the bottom of the frame, a sleeve fixedly mounted on the top of the frame, a sliding rod slidably mounted inside the sleeve, a mounting base fixedly mounted on the top of the sliding rod, symmetrically distributed guide sleeves fixedly connected to the mounting base, guide grooves formed on the sides of the guide sleeves, and telescopic rods slidably mounted inside the guide sleeves. The telescopic rods are collectively fixedly connected to a connecting rod, allowing the connecting rod to slide horizontally along the extension direction of the guide grooves, achieving guiding and limiting functions. A fixing frame is also fixedly mounted on the guide sleeves. A bushing is rotatably mounted at the middle position of the fixed frame, and a lead screw is fixedly mounted at the middle position of the connecting rod. One end of the lead screw passes through the bushing and forms a threaded engagement with the inner wall of the bushing. A first servo motor is mounted at the lower part of the fixed frame. The output shaft of the first servo motor and the bushing are provided with a pulley assembly. A connecting sleeve is sleeved on the other end of the lead screw. Both the lead screw and the connecting sleeve have a first pin hole, in which a first pin is inserted. A sleeve is fixedly connected to the end of the connecting sleeve away from the lead screw. A second pin hole is opened on the sleeve, in which a second pin is inserted.
[0007] As an improvement to the above solution, the inner wall of the sleeve is provided with multiple sliding grooves along the axial direction, and the outer wall of the slide rod is provided with protrusions that slide in cooperation with the sliding grooves.
[0008] As an improvement to the above solution, the edge of the sleeve opening is chamfered.
[0009] As an improvement to the above solution, a lifting screw is rotatably installed inside the sleeve. One end of the lifting screw passes through the slide rod and is threaded into the inner wall. A worm gear is installed at the lower end of the lifting screw. A second servo motor is installed on the frame. The output shaft of the second servo motor is connected to a worm gear that cooperates with the worm gear.
[0010] As an improvement to the above solution, a first clamping plate is fixedly connected to one end of the guide sleeve. A symmetrically distributed guide rod is slidably arranged on the first clamping plate. An elastic element is sleeved on the guide rod. The two ends of the elastic element are respectively connected to the guide rod and the first clamping plate. A second clamping plate is fixedly connected to the adjacent guide rods. The second clamping plate is parallel to the first clamping plate.
[0011] As an improvement to the above solution, a handle is provided on the side of the guide sleeve.
[0012] Compared with the prior art, the present invention has the following technical effects: 1. The device adopts a drive assembly consisting of a bushing, a lead screw, a first servo motor and a pulley assembly, and a double-sided parallel guide mechanism formed by a guide sleeve, a guide groove, a telescopic rod and a connecting rod. This effectively ensures the linear transmission of traction force during the shaft pulling process, avoids shaft bending, jamming or damage to the end face of the roll material caused by off-center load, lateral force or deflection, and significantly improves the stability and reliability of the operation. In addition, the double pin locking structure realizes the rigid connection between the sleeve and the shaft, effectively preventing circumferential rotation or axial slippage during the shaft pulling process. This double locking mechanism greatly improves the reliability of the connection and reduces the safety hazards of easy slippage of traditional rope or clamp connections.
[0013] 2. By setting up a lifting mechanism driven by a second servo motor, the overall height of the mounting base and its upper components can be precisely adjusted. This design enables the device to adapt to the installation height of the shaft core in different equipment, significantly improving the versatility of the equipment.
[0014] 3. By setting an elastic clamping mechanism consisting of a first clamping plate, a guide rod, an elastic element, and a second clamping plate at the end of the guide sleeve, this device can be quickly fixed to an external frame or column, ensuring the stability of the whole machine during the shaft pulling process and further improving the safety of operation. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0016] Figure 2 This is a three-dimensional sectional view of the mounting base, guide sleeve, and lead screw of this utility model.
[0017] Figure 3 This is a three-dimensional sectional view of the guide sleeve, connecting rod, and lead screw of this utility model.
[0018] Figure 4 This is an exploded view of the fixing frame, bushing, and first servo motor of this utility model.
[0019] Figure 5 This is a three-dimensional structural diagram of the telescopic rod, lead screw, and connecting rod of this utility model.
[0020] Figure 6 This is a three-dimensional sectional view of the lead screw, connecting sleeve, and bushing of this utility model.
[0021] Figure 7 This is a three-dimensional sectional view of the frame, slide bar, and lifting screw of this utility model.
[0022] Figure 8 This is an exploded view of the guide sleeve, lifting screw, and second servo motor of this utility model.
[0023] Figure 9 This is a three-dimensional structural diagram of the guide sleeve, the first clamping plate, and the second clamping plate of this utility model.
[0024] The component names and serial numbers in the diagram are as follows: 1. Frame, 2. Roller, 3. Sleeve, 4. Slide rod, 5. Mounting base, 6. Guide sleeve, 7. Guide groove, 8. Telescopic rod, 9. Connecting rod, 10. Fixing bracket, 11. Bushing, 12. Lead screw, 13. First servo motor, 14. Pulley assembly, 15. Connecting sleeve, 16. First pin, 17. Sleeve, 18. Second pin, 19. Lifting screw, 20. Worm gear, 21. Second servo motor, 22. Worm, 23. First clamping plate, 24. Guide rod, 25. Elastic element, 26. Second clamping plate, 27. Handle. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Example 1: Please refer to Figures 1-6A shaft puller anti-slip and stabilizing structure includes a frame 1, with four rollers 2 mounted on the bottom of the frame 1 for flexible movement and accurate positioning of the entire machine on the ground. A sleeve 3 is fixedly mounted on the top of the frame 1. Multiple sliding grooves are formed along the axial direction on the inner wall of the sleeve 3. A sliding rod 4 is slidably mounted inside the sleeve 3. The outer wall of the sliding rod 4 has protrusions that slide in cooperation with the sliding grooves. Through the guiding cooperation between the sliding grooves and the protrusions, the rotational freedom of the sliding rod 4 during the lifting process is restricted, ensuring that it can only move linearly along the axial direction. A mounting base 5 is fixedly mounted on the top of the sliding rod 4. A guide sleeve 6, symmetrically distributed front and rear, is fixedly attached to the seat 5. A guide groove 7 is formed on the inner side of each guide sleeve 6. A telescopic rod 8 is slidably mounted inside each guide sleeve 6. The telescopic rod 8 is fixedly connected to a connecting rod 9, allowing the connecting rod 9 to slide horizontally along the extension direction of the guide groove 7, thus achieving guiding and limiting functions. A fixing frame 10 is fixedly mounted on each guide sleeve 6. A bushing 11 is rotatably mounted at the middle position of the fixing frame 10. A lead screw 12 is fixedly mounted at the middle position of the connecting rod 9. One end of the lead screw 12 passes through the bushing 11 and forms a threaded engagement with the inner wall of the bushing 11. The lower part of the fixing frame 10 is equipped with a first servo motor 13. The output shaft of the first servo motor 13 and the bushing 11 are jointly provided with a pulley assembly 14. The other end of the lead screw 12 is sleeved with a connecting sleeve 15. Both the lead screw 12 and the connecting sleeve 15 are provided with first pin holes 16. A first pin 16 is inserted into the first pin hole 16 to prevent the connecting sleeve 15 from falling off the lead screw 12 when axially stressed, thereby achieving axial locking of the connection structure. The end of the connecting sleeve 15 away from the lead screw 12 is fixedly connected with a sleeve 17. The sleeve 17 is used to connect with the shaft. The front end of the core is connected. In addition, the edge of the sleeve 17 is chamfered, which plays a guiding role in the assembly process and avoids difficulty in insertion or damage to the end face due to slight eccentricity. The sleeve 17 is provided with a second pin 18 hole, in which a second pin 18 is inserted to lock the sleeve 17 with the front end shaft hole of the core, preventing relative rotation or axial slippage during the shaft pulling process. The guide sleeve 6 is provided with a handle 27 on the outside. The handle 27 has a U-shaped structure, which makes it easy for the operator to manually support and operate the shaft puller during the movement, positioning or adjustment of the equipment.
[0027] When using this device, firstly, select a sleeve 17 of matching size according to the diameter and front end structure of the shaft core to be pulled out. The operator pulls out the first pin 16 from the first pin 16 hole, removes the original connecting sleeve 15 and sleeve 17, replaces it with a sleeve 17 adapted to the current shaft type, and then puts the connecting sleeve 15 back onto the end of the lead screw 12, aligns it with the first pin 16 hole and inserts the first pin 16 to complete the quick replacement and axial limiting. Then, align the replaced sleeve 17 with the front end of the shaft core to be pulled out and put it on. Next, insert the second pin 18 into the second pin 18 hole on the sleeve 17, and simultaneously let it pass into the shaft hole at the front end of the shaft core, realizing a rigid connection and double locking between the sleeve 17 and the shaft core, effectively preventing the connection from loosening or slipping due to torque or vibration during the shaft pulling process, significantly improving the safety and reliability of the operation. Then, start the first servo motor 13, whose output shaft drives the bushing 11 to rotate through the pulley assembly 14. The screw 12 is threadedly fitted to the bushing 11, while the screw 12 itself is restricted from rotating by the guide sleeve 6 and the telescopic rod 8. Therefore, driven by the rotation of the bushing 11, the screw 12 generates a linear motion to the right under the action of the thread, thereby applying a stable axial tension to the shaft core through the connecting sleeve 15 and the sleeve 17. During this process, the telescopic rod 8 extends and retracts synchronously inside the guide sleeve 6, and the connecting rod 9 slides along the guide groove 7, forming a double-sided parallel guiding mechanism to ensure the linearity, centering and stability of the screw 12 traction process, and to avoid jamming, shaft bending or equipment damage caused by off-center load, lateral force or deflection. As the traction force continues to act, the shaft core is smoothly and uniformly pulled out from the assembly hole or the inner cavity of the coil. The entire shaft pulling process is precisely controlled by the servo motor to control the speed and torque, realizing flexible start and constant force pull-out, effectively protecting the end face of the coil and shaft parts from damage. After the shaft pulling operation is completed, the motor is turned off, and the reverse operation can be performed to unload the workpiece and prepare for the next operation.
[0028] Example 2: Based on Example 1, please refer to... Figure 7 and Figure 8 The sleeve 3 is rotatably provided with a lifting screw 19. One end of the lifting screw 19 passes through the slide rod 4 and is threaded into the inner wall. A worm gear 20 is installed at the lower end of the lifting screw 19. A second servo motor 21 is installed on the frame 1. The output shaft of the second servo motor 21 is connected to a worm 22 that cooperates with the worm gear 20.
[0029] When the working height of the shaft puller needs to be adjusted, the second servo motor 21 is started, and its output shaft drives the worm 22 to rotate. The worm 22 meshes with the worm wheel 20, causing the worm wheel 20 to rotate together with the lifting screw 19. Since the slide rod 4 is threadedly engaged with the lifting screw 19, the slide rod 4 will move linearly along the axis of the sleeve 3. When it moves upward, it drives the mounting base 5, guide sleeve 6, fixing frame 10, screw 12 assembly, etc. to rise as a whole. When it moves downward, it lowers as a whole. By controlling the forward and reverse rotation and speed of the second servo motor 21, the height of the shaft puller can be adjusted and precisely positioned to adapt to the installation height of the shaft core in different equipment.
[0030] Please see Figure 9 One end of the guide sleeve 6 is fixedly connected to a first clamping plate 23. The first clamping plate 23 is slidably provided with guide rods 24 symmetrically distributed front and back. An elastic element 25 is sleeved on the guide rod 24. The left and right ends of the elastic element 25 are respectively connected to the guide rod 24 and the first clamping plate 23. The adjacent guide rods 24 are jointly fixedly connected to a second clamping plate 26. The second clamping plate 26 is parallel to the first clamping plate 23.
[0031] Before operation, pull the second clamping plate 26 outward, compressing the elastic element 25. Then, place the external support structure between the first clamping plate 23 and the second clamping plate 26. Subsequently, release the second clamping plate 26, and the elastic element 25 generates a reverse elastic force, causing the first clamping plate 23 and the second clamping plate 26 to apply a clamping force to the middle fixing component. This clamping force can automatically adapt to external support structures of different thicknesses, achieving rapid installation and reliable fixation, thereby fixing the entire shaft puller on the external support structure and preventing the equipment from shifting or vibrating due to the reaction force during the shaft pulling process.
[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A kind of axle puller anti-skid stabilizing structure, comprising frame (1), the bottom of the frame (1) is equipped with multiple rollers (2), the top of the frame (1) is fixedly provided with sleeve (3), the inside of the sleeve (3) is slidably provided with slide rod (4), the top of the slide rod (4) is fixedly provided with mounting seat (5), it is characterized by, Symmetrically distributed guide sleeves (6) are fixedly connected to the mounting base (5). Guide grooves (7) are provided on the side of the guide sleeves (6). Telescopic rods (8) are slidably arranged inside the guide sleeves (6). The telescopic rods (8) are fixedly connected to a connecting rod (9), so that the connecting rod (9) can slide horizontally along the extension direction of the guide groove (7) to realize the guiding and limiting functions. The guide sleeves (6) are fixedly provided with a fixing frame (10). A bushing (11) is rotatably arranged in the middle position of the fixing frame (10). A lead screw (12) is fixedly arranged in the middle position of the connecting rod (9). One end of the lead screw (12) passes through the bushing (11) and is flush with the inner wall of the bushing (11). A threaded fit is formed. A first servo motor (13) is installed at the lower part of the fixed frame (10). The output shaft of the first servo motor (13) and the bushing (11) are provided with a pulley assembly (14). A connecting sleeve (15) is sleeved on the other end of the lead screw (12). A first pin (16) hole is opened on both the lead screw (12) and the connecting sleeve (15). A first pin (16) is inserted into the first pin (16) hole. A sleeve (17) is fixed to the end of the connecting sleeve (15) away from the lead screw (12). A second pin (18) hole is opened on the sleeve (17). A second pin (18) is inserted into the second pin (18) hole.
2. The anti-slip and stabilizing structure for a shaft puller according to claim 1, characterized in that, The inner wall of the sleeve (3) has multiple sliding grooves along the axial direction, while the outer wall of the slide rod (4) is provided with a protrusion that slides and engages with the sliding grooves.
3. The anti-slip and stabilizing structure for a shaft puller according to claim 2, characterized in that, The sleeve (17) has a chamfered edge.
4. The anti-slip and stabilizing structure for a shaft puller according to claim 3, characterized in that, The sleeve (3) is provided with a rotating lifting screw (19) inside. One end of the lifting screw (19) is inserted into the slide rod (4) and threaded into the inner wall. A worm gear (20) is installed at the lower end of the lifting screw (19). A second servo motor (21) is installed on the frame (1). The output shaft of the second servo motor (21) is connected to a worm gear (22) that cooperates with the worm gear (20).
5. The anti-slip and stabilizing structure for a shaft puller according to claim 4, characterized in that, One end of the guide sleeve (6) is fixedly connected to a first clamping plate (23). The first clamping plate (23) is slidably provided with symmetrically distributed guide rods (24). An elastic element (25) is sleeved on the guide rod (24). The two ends of the elastic element (25) are respectively connected to the guide rod (24) and the first clamping plate (23). The adjacent guide rods (24) are fixedly connected to a second clamping plate (26). The second clamping plate (26) is parallel to the first clamping plate (23).
6. The anti-slip and stabilizing structure for a shaft puller according to claim 5, characterized in that, A handle (27) is provided on the side of the guide sleeve (6).