Planetary cam roller geometry slip mechanical damper

Abstract

The present application provides a kind of planetary curved surface roller geometric slip type mechanical damper, mainly relates to damper field.A kind of planetary curved surface roller geometric slip type mechanical damper, including fixed disc and transmission input shaft, the transmission input shaft is the output shaft of using equipment, the transmission input shaft is coaxially arranged with fixed disc, rotation assembly is arranged on the transmission input shaft, and planetary assembly is arranged between the fixed disc and rotation assembly.The beneficial effects of the present application are that the present application can eliminate the abnormal wear of working parts caused by the backlash of equipment host gearbox, effectively improve production efficiency, significantly prolong the service life of equipment, and improve the comprehensive performance of equipment.

Description

Technical Field

[0001] This invention mainly relates to the field of dampers, specifically a planetary curved roller geometric slip mechanical damper. Background Technology

[0002] Backlash in the spindle of large rotating equipment is one of the reasons affecting equipment accuracy and causing component wear. Currently, magnetic powder clutches, electromagnetic brakes, pneumatic brakes, and disc brake mechanisms are mainly used to generate reverse damping to eliminate spindle backlash. While these devices can provide some damping effect in application, they all have significant drawbacks. Typical drawbacks include unstable damping torque, high frictional loss, and high thermal sensitivity; once the temperature rises to a certain critical value, damping failure will occur. For example, when a saw is operating (taking an ambient temperature of 30℃ and a spindle input speed of 150 r / min as an example), the surface temperature of components in the magnetic powder clutch and electromagnetic brake system can reach over 120℃. High temperatures weaken the magnetism of the materials, causing system failure and resulting in damage to the saw blade and other components. Furthermore, the above backlash elimination methods and devices generally have a short service life, increasing user costs. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a planetary curved roller geometric slip mechanical damper.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] A planetary curved roller geometric slip mechanical damper includes a fixed plate and a transmission input shaft. The transmission input shaft is the output shaft of the device being used. The transmission input shaft is coaxially arranged with the fixed plate. A rotating component is arranged on the transmission input shaft. A planetary component is arranged between the fixed plate and the rotating component.

[0006] The rotating assembly includes a driving disk and a driven disk. The driving disk is keyed to the transmission input shaft. Several transmission pins are provided between the driving disk and the driven disk. Grooves adapted to the planetary assembly are provided between the bottom of the driven disk and the top of the fixed disk.

[0007] The planetary assembly includes a cage and a plurality of planetary curved rollers, the planetary curved rollers being rotatably connected to the cage via retaining bearings, and the curved surfaces of the planetary curved rollers abutting against the sides of the grooves.

[0008] The drive disc and the stationary disc are rotatably connected by a thrust bearing, and an oil seal is provided between the outer input shaft of the thrust bearing and the stationary disc.

[0009] A clamping device is provided between the driven disc and the driving disc, and the clamping device makes the clamping force between the driven disc and the driving disc adjustable.

[0010] The clamping device is one of a spring system, a hydraulic device, or a pneumatic device.

[0011] The clamping device includes multiple disc springs, clamping force adjusting bolts, and clamping force adjusting nuts. The clamping force adjusting bolts pass through the driving disc and the driven disc. The disc springs are located between the head of the clamping force adjusting bolts and the bottom surface of the driving disc. The clamping force adjusting nuts are located on the top surface of the driven disc and cooperate with the clamping force adjusting bolts.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] This invention designs a unique multi-wheel planetary curved surface roller geometric slip friction damping structure. This structure uses a disc-type clamping structure to press multiple sets of planetary curved surface rollers, thereby generating uniform and adjustable rolling friction resistance. This method offers stable and adjustable operating torque, high reliability, good thermal stability, low component wear, and long-term stable operation. The unique structural characteristics of this structure result in simple component shapes that are easy to manufacture, have low assembly requirements, and are convenient to adjust. By adjusting the friction surface angles and mating shapes between the fixed disc, moving disc, and planetary curved surface rollers, damping torque suitable for different application requirements can be obtained. Furthermore, since most of the meshing between the components in this system is rotational meshing with a sufficiently large meshing area and meshing strength, by selecting suitable component materials and heat treatment methods, the components can achieve high surface wear resistance and fatigue strength. While obtaining sufficient damping torque, the temperature rise of the entire system due to the geometric slip friction operation is not high, enhancing the system's operational stability. The system's structural parts experience minimal wear. Even if wear occurs, the system's meshing force remains stable due to the three-point clamping method of the fixed and moving discs pressing against the three sets of planetary curved rollers and the application of pressure by the automatic pressure compensation device. As a result, the system's damping stability is extremely high, and its service life is also extremely long. Attached Figure Description

[0014] Appendix Figure 1 This is a cross-sectional structural diagram of Embodiment 1 of the present invention;

[0015] Appendix Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0016] Appendix Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0017] Appendix Figure 4 This is a schematic diagram of the structure after removing the sealing shell in Embodiment 2 of the present invention;

[0018] The following are the labels in the attached diagram: 1. Fixed plate; 2. Thrust bearing; 3. Driven plate; 4. Drive pin; 5. Cage; 6. Cage bearing; 7. Planetary roller; 8. Retaining ring; 9. Disc spring; 10. Pressure adjusting bolt; 11. Driven plate; 12. Oil seal; 13. Pressure adjusting nut; 15. Drive input shaft; 16. Sealing housing; 17. Sealing plate; 18. Sealing ring. Detailed Implementation

[0019] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0020] Example 1:

[0021] like Figure 1-2 As shown, this embodiment provides a planetary curved roller geometric slip mechanical damper. Taking a circular saw as an example, this device is used to eliminate backlash in the main shaft transmission of the circular saw. This device includes a fixed plate 1 and a transmission input shaft 15. The fixed plate 1 is mounted on the casing of the circular saw by a plate bottom bolt, and the through hole in the center of the fixed plate 1 is coaxial with the main shaft of the circular saw. The input shaft 15 is the main shaft of the circular saw.

[0022] A rotating assembly is mounted on the transmission input shaft 15, and a planetary assembly is mounted between the fixed plate 1 and the rotating assembly. The main shaft (input shaft 15) of the circular saw drives the rotating assembly to rotate, thereby causing the planetary assembly to rotate between the fixed plate 1 and the rotating assembly. The friction between the planetary assembly and the fixed plate 1 and the rotating assembly provides a damping effect to eliminate the backlash of the main shaft of the circular saw.

[0023] Specifically, the rotating assembly includes a driving disk 3 and a driven disk 11. The driving disk 3 is keyed to the transmission input shaft 15 to transmit the torque input by the input shaft 15. The driving disk 3 and the fixed disk 1 are rotatably connected via a thrust bearing 2. A retaining ring 8 is provided on the outer side of the driving disk 3 to limit the thrust bearing 2. An oil seal 12 is provided between the outer side of the input shaft 15 of the thrust bearing 2 and the fixed disk 1. Several transmission pins 4 are provided between the driving disk 3 and the driven disk 11 to transmit the input torque to the driven disk 11. Grooves adapted to the planetary assembly are formed between the bottom of the driven disk 11 and the top of the fixed disk 1. The planetary assembly includes a cage 5 and several planetary curved rollers 7. One side of each planetary curved roller 7 is conical, and the conical surface corresponds to the inner side profile of the groove. The planetary curved rollers 7 are rotatably connected to the cage 5 via a retaining bearing 6. The cage 5 is coaxially arranged with the fixed disk 1. In this embodiment, three planetary curved rollers 7 are provided. Three sets of retaining bearings 6 fix the three planetary curved rollers 7 at three evenly distributed fixed positions on the retainer 5, and they rotate together with the retainer 5. The curved surface of the planetary curved rollers 7 abuts against the side of the groove. When the transmission input shaft 15 drives the driving disk 3 to rotate, the driven disk 11 is driven to rotate through the transmission pin 4. Due to the friction, the driven disk 11 will drive the three planetary curved rollers 7 to rotate in the groove between the fixed disk 1 and the driven disk 11.

[0024] A clamping device is provided between the driven disk 11 and the driving disk 3. The clamping device makes the clamping force between the driven disk 11 and the driving disk 3 adjustable. By adjusting the clamping force of the clamping device, the planetary curved roller 7 can be tightly fixed in the grooves of the fixed disk 1 and the driving disk 11. The clamping device is one of a spring system, a hydraulic device, or a pneumatic device. In this embodiment, multiple sets of springs evenly distributed in a circumferential state are used as the clamping device. Specifically, the clamping device includes multiple sets of disc springs 9, clamping force adjusting bolts 10, and clamping force adjusting nuts 13. The clamping force adjusting bolts 10 pass through the driving disk 3 and the driven disk 11. The disc springs 9 are disposed between the head of the clamping force adjusting bolts 10 and the bottom surface of the driving disk 3. The clamping force adjusting nuts 13 are disposed on the top surface of the driven disk 11 and cooperate with the clamping force adjusting bolts 10. By tightening the clamping force adjusting nut 13, the driving disc 11 and the fixed disc 1 can be made to form a squeezing fit, and the three planetary curved rollers 7 are tightly fixed in the grooves of the fixed disc 1 and the driving disc 11, so that the curved surface of the planetary curved rollers 7 is closely attached to the groove surface. As the input shaft 15 rotates, the planetary curved rollers 7 rotate in the groove.

[0025] The damping torque of this device originates from the planetary curved roller 7 and the fixed disk 1. During relative rotational motion, the linear velocity at different positions is different due to the geometry of the contact surface between the groove and the planetary curved roller 7, resulting in geometric sliding and a frictional damping effect. For example... Figure 1 As shown in the figure, in the groove cross-section of the moving disk 11, four position points A, B, C, and D are defined in the groove. During the operation of the device, the linear velocity of each point is different. The linear velocities of each point in the surface between points AD and between points BC are also different. Due to this difference in linear velocity, the planetary curved roller 7 will inevitably generate relative friction caused by geometric sliding during the meshing process with the rotating motion of the fixed disk 1 and the moving disk 11. This converts the input mechanical energy into the internal friction energy of the device parts and releases it in the form of heat, ultimately eliminating the backlash of the main shaft.

[0026] When in use, the operating procedure of this device is as follows: First, the input shaft 15 inputs torque into the device. The driving disk 3, which is connected to the input shaft 15 by a key, rotates with the input shaft 15. At the same time, the driving disk 3 transmits torque to the driven disk 11 through the transmission pin 4, causing the driven disk 11 to rotate with the input shaft 15. Under the clamping force of the disc spring 9, the planetary curved roller 7 is held in the groove between the driven disk 11 and the fixed disk 1. As the driven disk 11 rotates, the planetary curved roller 7 rotates around the input shaft 15 under the action of friction and the limit of the cage 5. At the same time, the planetary curved roller 7 rotates and rubs against the groove surface, converting kinetic energy into heat energy and releasing it, thereby eliminating the backlash of the main shaft.

[0027] It is worth mentioning that when natural cooling is insufficient, a circulating oil cooling system can be added to the device to cool it.

[0028] In this device, the engagement between the planetary curved roller 7 and the groove is a rotary rolling engagement, resulting in uniform and stable frictional damping. The force distribution across all components is even, and the surface pressure is low. Through material selection and heat treatment, the workpiece's surface fatigue strength and wear resistance are sufficient for long-term operation. When different torque damping is required, simply adjusting the adjusting nut 13 and the pressure of the disc spring 9 on the moving plate 11 finely adjusts the tightness of the engagement between the planetary curved roller and the fixed and driving plates, thereby changing the frictional force and achieving the purpose of adjusting the damping torque of the device.

[0029] In this embodiment, the device can eliminate abnormal wear of saw blade teeth caused by backlash in the gearbox of the circular saw machine, effectively improve the cutting efficiency of the saw blade, significantly extend the service life of the saw blade, and improve the overall cutting efficiency of the circular saw machine.

[0030] Example 2:

[0031] like Figure 3-4 As shown, the clamping device in this embodiment differs slightly from that in Embodiment 1. In this embodiment, hydraulic or pneumatic pressure is used to clamp the driven disc 11. Specifically, a sealing housing 16 is installed on the fixed disc 1, covering all components. A sealing disc 17 is provided on the top of the driven disc, and the sealing disc 17 is connected to the input shaft 15 via a bearing. Several sealing rings 18 are provided between the sealing disc 17 and the inner wall of the sealing housing 16 for sealing. A pressure chamber is formed between the top of the sealing housing 16 and the sealing disc 17. A through hole is provided on the top of the sealing housing 16 to allow hydraulic or pneumatic pressure to pass through. By passing pressurized oil or high-pressure air into the pressure chamber, pressure is applied to the sealing disc 17, thereby pressurizing the driven disc 11 and causing the driven disc 11 to grip the planetary curved roller 7 tightly against the moving disc 1.

[0032] More specifically, a cooling oil port can be opened on the side of the sealed housing 16, through which cooling oil is circulated into the groove to quickly remove the heat generated by the friction between the planetary curved roller 7 and the groove, thereby further ensuring the stable operation of the system and improving the service life of the equipment.

Claims

1. A planetary curved roller geometric slip mechanical damper, comprising a fixed plate (1) and a transmission input shaft (15), wherein the transmission input shaft (15) is the output shaft of the device being used, characterized in that: The transmission input shaft (15) is coaxially arranged with the fixed plate (1). A rotating assembly is arranged on the transmission input shaft (15). A planetary assembly is arranged between the fixed plate (1) and the rotating assembly. The rotating assembly includes a driving plate (3) and a driven plate (11). The driving plate (3) is keyed to the transmission input shaft (15). Several transmission pins (4) are arranged between the driving plate (3) and the driven plate (11). Grooves adapted to the planetary assembly are provided between the bottom of the driven plate (11) and the top of the fixed plate (1). The driven plate (11) and the driving plate (3) A clamping device is provided between the driven disc (11) and the driving disc (3), the clamping device making the clamping force between them adjustable. The clamping device includes multiple disc springs (9), a clamping force adjusting bolt (10), and a clamping force adjusting nut (13). The clamping force adjusting bolt (10) passes through the driving disc (3) and the driven disc (11). The disc spring (9) is located between the head of the clamping force adjusting bolt (10) and the bottom surface of the driving disc (3). The clamping force adjusting nut (13) is located on the top surface of the driven disc (11) and cooperates with the clamping force adjusting bolt (10).

2. The planetary curved roller geometric slip mechanical damper according to claim 1, characterized in that: The planetary assembly includes a cage (5) and a plurality of planetary curved rollers (7). The planetary curved rollers (7) are rotatably connected to the cage (5) via a retaining bearing (6). The curved surface of the planetary curved rollers (7) abuts against the side of the groove.

3. The planetary curved roller geometric slip mechanical damper according to claim 1, characterized in that: The active disk (3) and the fixed disk (1) are rotatably connected by a thrust bearing (2), and an oil seal (12) is provided between the outer input shaft (15) of the thrust bearing (2) and the fixed disk (1).

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