Rotational damping system for motorised turntable

Abstract

The application relates to the field of laser tool accessories, in particular to a rotary damping system of an electric rotary table, which comprises a rotary lower cover arranged on the electric rotary table, a damping shaft body coaxially abutting with a rotating shaft in the electric rotary table, the damping shaft body being movably connected with the rotary lower cover along the axial direction and locking the relative position between the damping shaft body and the rotary lower cover through an adjusting piece, a rotary upper cover connected with the damping shaft body, and an elastic assembly arranged between the rotary upper cover and the rotary lower cover. The independent rotary damping system is arranged outside the electric rotary table, only the rotary upper cover needs to be rotated, the damping shaft body moves towards or away from the rotating shaft, the rotating shaft is pressed, the damping of the rotating shaft is adjusted, the separated damping rotary system and the rotating shaft do not affect each other, the operation is simple, the stability of the rotating shaft can be guaranteed, and the stability of the point-moving precision of the rotary table is maintained.

Description

Technical Field

[0001] This application relates to the field of accessories for laser tools, and more particularly to a rotation damping system for an electric rotary table. Background Technology

[0002] As the core load-bearing and pointing mechanism of high-precision optoelectronic systems, laser turntables are widely used in fields such as lidar, laser communication, precision tracking measurement, and laser processing. Their core function is to achieve rapid, stable, and precise pointing and scanning of the laser beam in both azimuth and elevation dimensions. The rotating shaft, as a key component enabling the turntable's rotational motion, directly determines the pointing accuracy, repeatability, and dynamic tracking capability of the entire system through its dynamic performance (such as stability, response speed, and anti-interference capability).

[0003] In practical engineering applications, the system consisting of the rotating shaft and its load has an inherent mechanical resonant frequency. When the turntable operates during high-speed start-stop, variable-speed scanning, or encounters external disturbances (such as wind load, base vibration, or motor torque fluctuations), this resonant frequency is easily excited, causing continuous or transient mechanical vibration of the rotating shaft. This vibration not only causes instantaneous deviations in beam pointing and trajectory jitter, severely affecting instantaneous positioning accuracy and scanning linearity, but also introduces phase lag in the closed-loop control system, even leading to system instability and making it difficult to achieve high-precision closed-loop control. Therefore, introducing a controllable and adjustable damping mechanism into the rotating shaft system has become one of the key technical means to improve the overall performance of the laser turntable.

[0004] In existing turntable equipment, manual coarse adjustment is mostly achieved by adding damping oil or wave pads to the bottom of the gears or other methods to increase the bottom friction resistance. This process is cumbersome and difficult to control, which makes actual production difficult. Because the gears are related to the overall turntable accuracy, there is a risk that the turntable will slip during inching control. Utility Model Content

[0005] The technical problem this invention aims to solve is that existing turntable damping adjustment methods are complex in process and difficult to operate.

[0006] Therefore, this utility model provides a rotation damping system for an electric turntable.

[0007] The technical solution adopted by this utility model to solve its technical problem is: A rotation damping system for an electric turntable includes, A rotating lower cover is mounted on an electric turntable; The damping shaft body is coaxially abutted against the rotating shaft in the electric turntable. The damping shaft body is movably connected to the rotating lower cover along its axial direction, and the relative position between the damping shaft body and the rotating lower cover is locked by an adjusting component. A rotating top cover is connected to the damping shaft body; An elastic component is disposed between the rotating upper cover and the rotating lower cover.

[0008] Furthermore, the adjusting component is a damping shaft adjusting nut, which is fixedly mounted on the rotating lower cover and threadedly connected to the end of the damping shaft body away from the rotating upper cover.

[0009] Furthermore, the elastic component includes a damping shaft elastic washer, which is disposed between the rotating upper cover and the damping shaft adjusting nut.

[0010] Furthermore, two damping shaft elastic washers are provided, which are arranged back to back, with the front faces of the damping shaft elastic washers facing the rotating upper cover and the rotating lower cover, respectively.

[0011] Furthermore, a damping shaft lower mounting plate is sleeved on the damping shaft body, and the damping shaft lower mounting plate is fixedly connected to the rotating lower cover by screws. The elastic component is disposed between the damping shaft lower mounting plate and the damping shaft adjusting nut.

[0012] Furthermore, a damping shaft mounting plate is sleeved on the damping shaft body, and the damping shaft mounting plate is located close to the rotating top cover and is fixedly connected to the rotating top cover by screws.

[0013] Furthermore, a damping shaft barrier pad and a damping shaft mounting pad are provided between the upper mounting plate of the damping shaft and the lower mounting plate of the damping shaft.

[0014] Furthermore, the rotating top cover is provided with an operating part, which is used to rotate the rotating top cover and the damping shaft.

[0015] The beneficial effects of this utility model are that it sets up an independent rotational damping system outside the electric turntable. By simply rotating the top cover, the damping shaft moves toward or away from the turntable, applying pressure to the turntable and adjusting its damping. This detached damping rotational system does not affect the turntable and is easy to operate. It can ensure the stability of the turntable and maintain the stability of the turntable's jogging accuracy, always keeping it at, for example, ±20 seconds per jogging. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the rotation damping system of the electric turntable in this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of the damping rotating shaft in this utility model.

[0019] In the diagram: 1. Turntable; 2. Rotating shaft; 3. Rotating upper cover; 4. Rotating lower cover; 5. Damping shaft body; 6. Damping shaft isolation pad; 7. Damping shaft mounting pad; 8. Damping shaft lower mounting plate; 9. Damping shaft upper mounting plate; 10. Damping shaft elastic washer; 11. Damping shaft adjusting nut; 12. Operating part. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] A rotational damping system for an electric turntable 1 is provided, which is set on the top of the electric turntable 1 and acts on the rotating shaft 2 of the electric turntable 1. The rotational damping system of the electric turntable 1 is an independent system and is set separately from the electric turntable 1. It can easily change the damping of the rotating shaft 2 while maintaining the structural stability of the rotating shaft 2, thereby improving the jogging accuracy of the rotating shaft 2.

[0024] The rotation damping system of the electric turntable 1 includes a rotating upper cover 3, a damping rotating shaft 2, a rotating lower cover 4, and an operating unit 12.

[0025] The damping rotation shaft 2 includes a damping shaft body 5, an upper mounting plate 9, a damping shaft isolation pad 6, a damping shaft mounting pad 7, a lower mounting plate 8, an elastic component, and an adjusting component. The elastic component includes two damping shaft elastic washers 10. The damping shaft body 5 is coaxially and fixedly connected to the rotating upper cover 3. The upper mounting plate 9, the damping shaft isolation pad 6, the lower mounting plate 8, and the two damping shaft elastic washers 10 are sequentially fitted onto the damping shaft body 5.

[0026] The damping shaft mounting plate 9 is positioned close to the rotating upper cover 3 and is fixedly connected to the rotating upper cover 3 by screws. The damping shaft mounting plate 8 is fixedly connected to the rotating lower cover 4 by screws. Damping shaft mounting pads 7 are also provided on both sides of the damping shaft mounting plate 8. Two damping shaft elastic washers 10 are positioned back to back, with the front of the damping shaft elastic washers 10 facing the rotating upper cover 3 and the rotating lower cover 4, respectively. The adjusting component in this embodiment is the damping shaft adjusting nut 11, which is fixedly mounted on the rotating lower cover 4. The damping shaft adjusting nut 11 is threadedly connected to the end of the damping shaft body 5 away from the rotating upper cover 3 to limit the components sleeved on the damping shaft body 5. The damping size of the damping rotating shaft 2 can be adjusted by adjusting the damping shaft adjusting nut 11 according to actual needs.

[0027] Use glue to fix the slotted 1 / 4 screw to the corresponding position of the rotating top cover 3. The rotating top cover 3 and the damping rotating shaft 2 are connected by M3*4 Phillips head countersunk screws. Use M3*6 Phillips pan head screws to connect the rotating bottom cover 4 to the damping rotating shaft 2. When the user turns the rotating top cover 3 by hand, it can be manually rotated without affecting other modules and with a damping effect.

[0028] The adjustable damping effect in the existing turntable 1 is usually achieved by applying damping oil to the bottom of the driven gear or adding a wave shim, and then pressing the rotating shaft 2 and the driven gear with a nut to adjust the damping magnitude. When the damping force F at the bottom of the driven gear is greater than T (transmission torque), the turntable 1 can achieve a jogging effect. When manually adjusted, when the force applied by the hand is greater than the damping force F at the bottom of the driven gear in the turntable 1, the turntable 1 can be manually rotated. However, this method has too high requirements for the damping oil preparation process and dosage process. In actual production, there is a risk that the driven gear will slip during jogging. If the damping force F at the bottom of the driven gear is less than T (transmission torque), the jogging accuracy of the turntable 1 will change from the original setting of ±20 seconds per jogging to ±100 seconds or even more per jogging, thus making the structure unstable and the accuracy unstable.

[0029] The rotary damping system in this application is an independent system outside the turntable 1. When the user needs to manually adjust the turntable 1, he only needs to rotate the rotating cover 3 so that the damping shaft 5 presses against the rotating shaft 2, and the damping can be easily changed. This detached rotary damping system will not affect the rotating body. As a result, the jogging accuracy of the turntable 1 is more stable, always maintaining a jogging accuracy of ±20 seconds per cycle.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A rotational damping system for an electric turntable, characterized in that, include, Rotating lower cover (4), the rotating lower cover (4) is mounted on an electric turntable (1); The damping shaft body (5) is coaxially abutted with the rotating shaft (2) in the electric turntable (1). The damping shaft body (5) is movably connected to the rotating lower cover (4) along its axial direction, and the relative position between the damping shaft body (5) and the rotating lower cover (4) is locked by the adjusting member. Rotate the top cover (3), which is connected to the damping shaft body (5); An elastic component is disposed between the rotating upper cover (3) and the rotating lower cover (4).

2. The rotation damping system of the electric turntable according to claim 1, characterized in that, The adjusting component is a damping shaft adjusting nut (11), which is fixedly mounted on the rotating lower cover (4). The damping shaft adjusting nut (11) is threadedly connected to the end of the damping shaft body (5) away from the rotating upper cover (3).

3. The rotation damping system of the electric turntable according to claim 2, characterized in that, The elastic component includes a damping shaft elastic washer (10), which is disposed between the rotating upper cover (3) and the damping shaft adjusting nut (11).

4. The rotational damping system of the electric turntable according to claim 3, characterized in that, Two damping shaft elastic pads (10) are provided, and the two damping shaft elastic pads (10) are arranged back to back, with the front of the damping shaft elastic pads (10) facing the rotating upper cover (3) and the rotating lower cover (4) respectively.

5. The rotational damping system of the electric turntable according to claim 2, characterized in that, The damping shaft body (5) is fitted with a damping shaft lower mounting plate (8), which is fixedly connected to the rotating lower cover (4) by screws. The elastic component is disposed between the damping shaft lower mounting plate (8) and the damping shaft adjusting nut (11).

6. The rotation damping system of the electric turntable according to claim 2, characterized in that, The damping shaft body (5) is fitted with a damping shaft mounting plate (9), which is located near the rotating cover (3) and is fixedly connected to the rotating cover (3) by screws.

7. The rotational damping system of the electric turntable according to claim 6, characterized in that, A damping shaft blocking pad (6) and a damping shaft mounting pad (7) are provided between the upper mounting plate (9) and the lower mounting plate.

8. The rotation damping system of the electric turntable according to claim 1, characterized in that, An operating part (12) is provided on the rotating top cover (3), and the operating part (12) is used to rotate the rotating top cover (3) and the damping shaft (5).

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