Direct drive turntable device
By designing a direct-drive turntable device, utilizing a direct-drive system with an encoder motor and deep groove ball bearings, combined with motor closed-loop control and photoelectric switch dual verification, the accuracy and maintenance issues of belt-driven turntables are solved, achieving high-precision sample delivery and cost savings.
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI JINGPU INSTR
- Filing Date
- 2025-09-11
- Publication Date
- 2026-07-31
AI Technical Summary
Existing belt-driven turntables suffer from problems such as low positioning accuracy, high maintenance costs, and lack of closed-loop control or inability to guarantee closed-loop control accuracy.
A direct-drive turntable device is adopted, which uses a motor with an encoder and a deep groove ball bearing to achieve direct drive, and improves the sample delivery accuracy through motor closed-loop control and photoelectric switch dual inspection.
It significantly improves the sample delivery accuracy of multi-sample turntables and reduces maintenance and usage costs.
Smart Images
Figure CN224577332U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a direct-drive turntable device. Background Technology
[0002] The fluorescence analyzer industry has a high demand for automated sample testing. Rotary tables can provide automated multi-sample delivery, thereby reducing sample waiting time. Currently, conventional rotary tables are belt-driven, but belt drives have the following disadvantages:
[0003] 1. The belt-driven turntable has low precision in rotating to its designated position;
[0004] 2. Belt-type turntables require regular maintenance, including belt tensioning, and the belts have a limited lifespan, increasing product costs.
[0005] 3. No closed-loop control or closed-loop control accuracy cannot be guaranteed. Utility Model Content
[0006] This utility model proposes a direct-drive turntable device, which aims to solve the problems of low positioning accuracy, high maintenance cost, and lack of closed-loop control or inability to guarantee the accuracy of closed-loop control in belt-driven turntables.
[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:
[0008] A direct-drive turntable device includes: a motor with an encoder, the motor shaft of which is connected to the lower end of a turntable shaft via a coupling; a fixed ring, which is connected to the upper end of the turntable shaft via a deep groove ball bearing; the lower end of the fixed ring is fixed together with a rotating component and a flange; a turntable base plate, which is connected to the fixed ring; the turntable base plate is provided with an origin positioning photoelectric switch and a turntable positioning photoelectric switch, and the turntable base plate is provided with a material picking port; a turntable drive plate, which is fixed to the top of the rotating shaft via a pin and a locking nut and connected to the fixed ring via a plane bearing, and the turntable drive plate is provided with multiple turntable positioning plates and an origin positioning plate below it; the drive plate is provided with multiple feeding ports along its outer side, each feeding port corresponding to one of the turntable positioning plates; a turntable ring, which is fixed to the turntable base plate, and the turntable ring has a material picking port on its side wall, the material picking port corresponding to the material picking port.
[0009] Preferably, the deep groove ball bearing includes a first deep groove ball bearing, a second deep groove ball bearing, and a third deep groove ball bearing, wherein the first bearing and the second bearing are both located at the upper end inside the retaining ring; and the third deep groove ball bearing is located at the lower end inside the retaining ring.
[0010] Preferably, a friction pad is laid on the bottom plate of the turntable.
[0011] By adopting the above technical solution, this utility model achieves direct drive through a motor with an encoder, a fixed ring, and multiple deep groove ball bearings, and improves the sample delivery accuracy of the multi-sample turntable through motor closed-loop control and photoelectric switch dual inspection. Attached Figure Description
[0012] Figure 1 A cross-section of an embodiment of the present invention. Figure 1 ;
[0013] Figure 2 This is a cross-section of the present invention. Figure 2 ;
[0014] Figure 3 for Figure 1 Top view of the embodiment. Detailed Implementation
[0015] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.
[0016] See Figure 1 and Figure 2 The image shows an embodiment of this utility model. The direct-drive turntable device in this embodiment includes a motor 1 with an encoder, a coupling 2, a retaining ring 3, a turntable shaft 4, a deep groove ball bearing, a transfer component 6, a flange 7, a turntable base plate 8, a position photoelectric switch 9, a turntable position photoelectric switch 10, a turntable drive plate 11, and other components.
[0017] The motor shaft of the encoder-equipped motor 1 is connected to the lower end of a turntable shaft 4 via a coupling 2. A first deep groove ball bearing 51, a second deep groove ball bearing 52, and a third deep groove ball bearing 53 are provided at the upper end of the turntable shaft 4. A retaining ring 3 is provided on the outer side of the deep groove ball bearings. The upper end of the retaining ring 3 is connected to the turntable base 8, and the lower end of the retaining ring 3 is connected to a transfer component 6. The transfer component 6 is fixed to the upper end of a flange 7, and the lower end of the flange 7 is fixed to other mechanical components.
[0018] The turntable base plate 8 is equipped with an origin positioning photoelectric switch 9 and a turntable positioning photoelectric switch 10. The turntable base plate 8 is equipped with a material feeding port 81.
[0019] The turntable drive plate 11 is fixed to the top of the turntable shaft 4 by pins 151 and 152 and a locking nut 13, and is connected to the fixed ring 3 by a plane bearing 14. It is also supported by the plane bearing 14 mounted on the fixed ring 3. The plane bearing 14 supports the turntable drive plate 14 and reduces resistance during rotation. Below the turntable drive plate 11 are N turntable positioning plates 12 and one origin positioning plate 13. The drive plate 11 has multiple feeding ports 111 along its outer edge, each feeding port 111 corresponding to a turntable positioning plate 12.
[0020] The turntable ring 16 is fixed to the turntable base plate 8. The turntable ring 16 has a material picking opening 161 on its side wall, which corresponds to the material picking opening 81 for easy material picking. The turntable ring 16 mainly serves a protective function, protecting the material on the feeding port 111 of the turntable drive plate 11.
[0021] A friction pad 17 is laid on the turntable base plate 8 to increase the friction between the material and the turntable base plate 8 and reduce the noise caused by the friction during movement.
[0022] The working principle of this application is as follows:
[0023] The encoder sets the origin in the initial state to the origin positioning piece 13, which is located within the origin positioning photoelectric switch 9. When the photoelectric switch is triggered, the turntable is at the zero point.
[0024] If the encoder receives a sample delivery request, the encoder-equipped motor 1 sends pulses to directly drive the coupling 2 and the turntable shaft 4, thereby driving the turntable drive plate 11 to rotate in a circular direction. During this process, the first deep groove ball bearing 51, the second deep groove ball bearing 52, and the third deep groove ball bearing 53 mainly constrain the turntable shaft 4 in a circular direction to ensure its vertical rotation. Pins 151 and 152 ensure that the turntable drive plate 11 and the turntable shaft 4 achieve synchronous movement without missing steps. Furthermore, the turntable drive plate 11 rotates smoothly horizontally under the support of the plane bearing 14, thereby driving the sample cup to perform circular motion on the friction pad 17 and under the constraint of the turntable ring 16. The rotation angle is controlled by the number of pulses emitted by the encoder-equipped motor 1 and the turntable positioning plate 12 and the turntable positioning photoelectric switch 10 after each sample reaches the designated position, which are used to control the positioning accuracy. When both reach the preset conditions, it indicates that the sample delivery is complete.
[0025] This invention employs a closed-loop motor control and a dual inspection method using photoelectric switches, which significantly improves the sample delivery accuracy of multiple sample trays and saves customers substantial usage and maintenance costs.
[0026] The embodiments described above are for illustrative purposes only and are not intended to limit the scope of this utility model. All equivalent changes and modifications made to this utility model by those skilled in the art should fall within the scope of the appended claims.
Claims
1. Direct drive rotary table apparatus, characterized in that include: A motor with an encoder has its motor shaft connected to the lower end of a turntable shaft via a coupling; A retaining ring is connected to the upper end of the turntable shaft via a deep groove ball bearing; the lower end of the retaining ring is fixed together with the intermediate component and the flange. A turntable base plate is connected to the fixed ring; the turntable base plate is provided with an origin positioning photoelectric switch and a turntable positioning photoelectric switch, and the turntable base plate is provided with a material picking port; The turntable drive plate is fixed to the top of the turntable shaft by a pin and a locking nut and connected to the fixed ring by a plane bearing. The turntable drive plate is provided with multiple turntable positioning plates and an origin positioning plate below it. The turntable drive plate is provided with multiple feeding ports along its outer side, and each feeding port corresponds to one of the turntable positioning plates. A turntable ring is fixed to the turntable base plate, and a material picking opening is provided on the side wall of the turntable ring, which corresponds to the material picking opening.
2. The direct drive rotary table apparatus of claim 1, wherein, The deep groove ball bearing includes a first deep groove ball bearing, a second deep groove ball bearing, and a third deep groove ball bearing. The first deep groove ball bearing and the second deep groove ball bearing are both located at the upper end inside the fixed ring; the third deep groove ball bearing is located at the lower end inside the fixed ring.
3. The direct drive rotary table apparatus of claim 1, wherein, A friction pad is laid on the bottom plate of the turntable.