A precision turntable structure

Abstract

The application discloses a precision rotary table structure, which comprises a shell, the inside of the shell is provided with a driving deceleration assembly, the upper part of the driving deceleration assembly is connected with a code disc seat, the upper center of the code disc seat is provided with a connecting part, the upper outer periphery of the code disc seat is connected with a grating code disc, the outer periphery of the shell is connected with a circuit board, the circuit board is located above the grating code disc, and the grating code disc and an indicating grating seat on the circuit board constitute a grating encoder. The application has the beneficial effects that through compact modular design, various components are matched with each other, high-precision angle control and environmental adaptability are realized.

Description

Technical Field

[0001] This application belongs to the field of precision machinery technology, specifically relating to a precision turntable structure, which is a compact modular turntable structure for achieving high-precision angular positioning and rotational motion. Background Technology

[0002] In the field of precision machinery, rotary tables are key devices for achieving precise angular rotation, widely used in industrial automation, aerospace, and scientific instruments. Existing rotary table structures often suffer from problems such as large size, low precision, and poor environmental adaptability. For example, traditional rotary tables use separate encoders and reducers, resulting in a loose structure, limited precision, and difficulty in stable operation under harsh environments (such as high and low temperatures, and high humidity). Furthermore, existing designs lack standardization in communication interfaces and control protocols, affecting system integration efficiency.

[0003] Specifically, existing turntable structures typically have one or more of the following problems, limiting their application in high-end precision equipment: (1) Size and integration issues: Traditional turntables separate the drive motor, reduction mechanism, angle sensor (encoder), and other components and assemble them through external connections, resulting in a loose overall structure, large size, and large space occupation, making it difficult to integrate into modern compact equipment with strict space constraints. (2) Accuracy and stability issues: Due to the loose structure and long transmission chain, gaps, deformation, and vibration are easily introduced, resulting in low resolution and poor accuracy of angle measurement. Moreover, it is difficult to maintain stability during long-term operation or variable speed motion, making it difficult to meet the high precision requirements of sub-arcsecond level. (3) Environmental adaptability issues: Conventional turntable structures have low protection levels, making it difficult to work stably in industrial or outdoor environments with dust, moisture, or large temperature fluctuations, limiting reliability and lifespan. (4) System integration complexity issues: Inconsistent electrical interfaces and communication protocols increase the difficulty and workload of integration with the host computer control system.

[0004] Therefore, there is an urgent need for a turntable structure that is highly integrated, has excellent precision, and is environmentally robust. Utility Model Content

[0005] The purpose of this application is to provide a precision turntable structure, the core technical solution of which is a compact modular design that integrates drive, transmission and measurement functions into one, thus solving the problem of large size of existing turntable structures.

[0006] The objective of this application is achieved through the following technical solution: A precision turntable structure includes a housing, inside which a drive reduction assembly is provided. The upper part of the drive reduction assembly is connected to a code disk holder. A connecting part protrudes from the center of the upper part of the code disk holder. The upper outer periphery of the code disk holder is connected to a grating code disk. The outer periphery of the housing is connected to a circuit board. The circuit board is located above the grating code disk. The grating code disk and the indicator grating holder on the circuit board constitute a grating encoder.

[0007] Furthermore, the drive reduction assembly includes a drive motor and a reducer. The drive motor is fixed at the bottom of the housing, the reducer is fixed inside the housing, the drive motor is connected to the reducer, and the reducer is connected to the code disk base.

[0008] Furthermore, the output shaft of the drive motor is connected to the rotating shaft via a coupling, and the rotating shaft is connected to the code disk base. Both the coupling and the rotating shaft are located at the center.

[0009] Furthermore, the drive motor is a stepper motor.

[0010] Furthermore, the speed reducer is a harmonic speed reducer.

[0011] Furthermore, the upper part of the housing is provided with a pad, and the outer periphery of the pad is provided with several connecting posts, with the circuit board fixed on the upper part of the connecting posts.

[0012] Furthermore, the pad is mounted on the upper part of the drive reduction assembly.

[0013] Furthermore, the circuit board is fixed to the connecting post by screws.

[0014] Furthermore, an encoder cover is fitted onto the housing, which covers the code disk holder, circuit board, and grating code disk, with the connecting part of the code disk holder extending out of the encoder cover.

[0015] Furthermore, a rubber ring is provided between the encoder cover and the code disk base.

[0016] The beneficial effects of this application are: through a compact modular design, the components work together to achieve high-precision angle control and environmental adaptability.

[0017] The aforementioned main solution and its various further alternatives can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding this solution, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this application.

[0019] In the diagram: 1-code disk holder, 2-circuit board, 3-grating code disk, 4-connecting post, 5-pad, 6-housing, 7-drive motor, 8-rubber ring, 9-shaft, 10-coupling, 11-encoder cover, 12-reducer. Detailed Implementation

[0020] The present application will be further described below with reference to specific embodiments and accompanying drawings.

[0021] refer to Figure 1 As shown, a precision turntable structure includes a code disk base 1, a circuit board 2, a grating code disk 3, a connecting column 4, a pad 5, a housing 6, a drive reduction assembly, a rubber ring 8, and an encoder cover 11. The drive reduction assembly includes a drive motor 7, a rotating shaft 9, a coupling 10, and a reducer 12.

[0022] The housing 6 serves as the basic component of the turntable, providing support and protection for other components, and is preferably a circular structure. Inside the housing 6 is a drive reduction assembly, the upper part of which is connected to the code disk base 1. This drive reduction assembly provides the power for the turntable's rotation, causing the code disk base 1 to rotate along its central axis. A connecting portion protrudes from the upper center of the code disk base 1, serving as a transition point for connecting and securing the code disk base 1 to an external load or equipment.

[0023] The upper outer periphery of the code disk holder 1 is connected to the grating code disk 3, and the outer periphery of the housing 6 is connected to the circuit board 2. The circuit board 2 is located above the grating code disk 3. The grating code disk 3 and the indicator grating seat on the circuit board 2 constitute a grating encoder. The rotating code disk holder 1 drives the grating code disk 3 to rotate, while the indicator grating seat on the circuit board 2 remains stationary. Thus, the photoelectric cooperation between the two forms a grating encoder, which is used to detect the turntable angle position in real time and at high resolution. Because the circuit board 2 and the grating code disk 3 are arranged in staggered layers and coaxially with the code disk holder 1, a compact arrangement of the grating encoder on the outer periphery is achieved, reducing the overall structural space.

[0024] The drive reduction assembly includes a drive motor 7, a rotating shaft 9, a coupling 10, and a reducer 12. The drive motor 7 is fixed to the bottom of the housing 6 by studs, and the reducer 12 is fixed inside the housing 6 by studs. The drive motor 7 is connected to the reducer 12, and the reducer 12 is connected to the encoder base 1. The drive motor 7 provides the power for the turntable to rotate, and the reducer 12 reduces the speed of the motor.

[0025] The output shaft of the drive motor 7 extends into the housing 6 and is connected to the rotating shaft 9 via a coupling 10. The rotating shaft 9 is fixedly connected to the code disk base 1 by screws. Both the coupling 10 and the rotating shaft 9 are located at the center, achieving a central transmission connection between the drive motor 7 and the code disk base 1, avoiding the space occupied by placing them on the outside. Preferably, the drive motor 7 is a stepper motor, and the reducer 12 is a harmonic reducer.

[0026] A pad 5 is fixed to the upper part of the housing 6 by studs. The pad 5 is used to elevate the structure, facilitating the installation of the connecting posts 4. At the same time, the pad 5 is clamped on the upper part of the reducer 12 in the drive reduction assembly, ensuring the stable and accurate position of the reducer 12. Several connecting posts 4 are provided on the outer periphery of the pad 5. The circuit board 2 is fixed to the upper part of the connecting posts 4 by screws. The connecting posts 4 are used to fix the circuit board 2 and elevate the circuit board 2 above the grating code disk 3, thereby ensuring a safe distance and alignment accuracy between the circuit board and the moving parts.

[0027] An encoder cover 11 is fitted onto the housing 6 and is fixed to the housing 6 with screws. The encoder cover 11 covers the code disk holder 1, the circuit board 2 and the grating code disk 3. The connecting part of the code disk holder 1 extends out of the encoder cover 11. The housing 6 and the encoder cover 11 form a sealed or highly protected cavity, providing mechanical support and environmental protection for the internal precision components.

[0028] A rubber ring 8 is provided between the encoder cover 11 and the code disk holder 1. The rubber ring 8 is used to seal the gap between the encoder cover 11 and the code disk holder 1 to prevent external rainwater and dust from entering the interior and affecting the accuracy and lifespan of the internal components. At the same time, the rubber ring 8 is also located between the circuit board 2 and the code disk holder 1 and between the grating code disk 3 and the code disk holder 1, for the safety isolation between moving parts and fixed parts.

[0029] The workflow of this application is as follows: A stepper motor is used as the power source to drive the rotation. Its output shaft is connected to a rotating shaft via a coupling, driving the rotating shaft to move synchronously. The rotating shaft is connected to the input end of a harmonic reducer. The harmonic reducer reduces the high speed of the stepper motor by the rated reduction ratio and increases the torque before outputting it to the code disk holder, driving the code disk holder to rotate. The code disk holder and the code disk are fixedly connected and rotate synchronously.

[0030] Meanwhile, a code disk information reading head (signal receiver) is arranged on the circuit board. When the device rotates, the circuit board detects the changes in the code disk track position in real time and receives the signal. This signal is transmitted as feedback data to the control system, which adjusts the speed and torque of the stepper motor in real time, thereby realizing a fully closed-loop precise control from stepper motor drive to the output rotation of the code disk holder.

[0031] The output end of the harmonic reducer is directly connected to the code disk holder, allowing the code disk holder to function as the output shaft of the integrated turntable and directly connect to external loads or equipment. Furthermore, the sides of the code disk holder are fitted with rubber sealing rings to ensure a sealed connection at the rotational joints. All of the above components are housed within the encoder cover, forming a compact, integrated structure.

[0032] The essence of this structural design lies in the precise coordination between the components and the optimized spatial layout, which accommodates all functional units within a very small cylindrical space.

[0033] The foregoing basic examples and their further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in this application. In the scheme of this application, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0034] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A precision turntable structure, comprising a housing (6), characterized in that: The housing (6) is equipped with a drive reduction assembly inside. The upper part of the drive reduction assembly is connected to the code disk base (1). The upper center of the code disk base (1) has a connecting part protruding. The upper outer periphery of the code disk base (1) is connected to the grating code disk (3). The outer periphery of the housing (6) is connected to the circuit board (2). The circuit board (2) is located above the grating code disk (3). The grating code disk (3) and the indicator grating base on the circuit board (2) constitute a grating encoder.

2. The precision turntable structure according to claim 1, characterized in that: The drive deceleration assembly includes a drive motor (7) and a reducer (12). The drive motor (7) is fixed at the bottom of the housing (6), and the reducer (12) is fixed inside the housing (6). The drive motor (7) is connected to the reducer (12), and the reducer (12) is connected to the code disk holder (1).

3. The precision turntable structure according to claim 2, characterized in that: The output shaft of the drive motor (7) is connected to the rotating shaft (9) through the coupling (10), and the rotating shaft (9) is connected to the code disk seat (1). Both the coupling (10) and the rotating shaft (9) are located at the center.

4. The precision turntable structure according to claim 2, characterized in that: The drive motor (7) is a stepper motor.

5. The precision turntable structure according to claim 2, characterized in that: The speed reducer (12) is a harmonic speed reducer.

6. The precision turntable structure according to claim 1, characterized in that: The upper part of the housing (6) is provided with a pad (5), and the outer periphery of the pad (5) is provided with several connecting posts (4). The circuit board (2) is fixed on the upper part of the connecting posts (4).

7. The precision turntable structure according to claim 6, characterized in that: The pad (5) is mounted on the upper part of the drive deceleration assembly.

8. The precision turntable structure according to claim 6, characterized in that: The circuit board (2) is fixed to the connecting post (4) by screws.

9. The precision turntable structure according to claim 1, characterized in that: The housing (6) is fitted with an encoder cover (11), which covers the code disk holder (1), the circuit board (2) and the grating code disk (3). The connecting part of the code disk holder (1) extends out of the encoder cover (11).

10. The precision turntable structure according to claim 9, characterized in that: A rubber ring (8) is provided between the encoder cover (11) and the code disk base (1).

Images