A centrifuge basket positioning device
Patent Information
- Application Number
- CN202521609530.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-30
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-07-30
AI Technical Summary
[0002]在IVD体外诊断行业，传统检验分析操作流程中，标本前处理阶段（分选、离心、开盖等）需要检验人员手工作业，这些环节不仅耗时长、过程繁琐、容易出现差错，而且有职业暴露风险
本实用新型中的一种离心机吊篮定位装置，通过测距传感器识别检测凹槽，再通过定位组件与定位凹槽配合定位，结构简单，使用方便，定位精准，制造成本低；同时通过测距传感器检测吊篮定位位置，即便在离心机故障断电重启后，仍然能通过传感器数据找到断电前要定位的吊篮，为离心机恢复到断电前状态继续工作提供了有效保障。本装置成本低廉，工作可靠，维修方便，有效降低了吊篮定位偏差，提高了离心机工作时的可靠性。
Smart Images
Figure CN224793720U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of centrifuge technology, and in particular to a centrifuge basket positioning device. Background Technology
[0002] In the IVD (In Vitro Diagnostics) industry, traditional testing and analysis procedures require manual operation of the specimen pretreatment stage (sorting, centrifugation, capping, etc.). These steps are not only time-consuming and cumbersome, but also prone to errors and pose occupational exposure risks. Among them, the centrifugation stage of the sample pretreatment system is particularly important, and centrifuges have become standard equipment for various manufacturers. Traditional centrifuge basket positioning mainly uses servo motors or brake motors, which have the following drawbacks: When using servo positioning, the robotic arm is prone to friction with the basket when picking up and placing centrifuge blocks, causing the motor to reverse and resulting in resonance; when using brake positioning, the spindle locks after a power failure, making it impossible to manually rotate the basket to clean damaged samples; at the same time, neither method can resume operation after a power failure. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides a centrifuge basket positioning device that enables precise positioning and locking of the centrifuge basket.
[0004] To solve the above-mentioned technical problems, this utility model provides a centrifuge basket positioning device, comprising: a mounting base plate with a connecting hole in the middle; a drive motor with its power output end passing through the connecting hole and connected to the basket, wherein the sample to be centrifuged is fixed in the basket; a positioning disk fixed on the main shaft of the drive motor and rotating synchronously with the basket; the positioning disk having at least two sets of positioning units circumferentially arranged; each set of positioning units including a detection groove and a positioning groove adjacent to each other on the outer edge of the positioning disk; a distance sensor fixed on the mounting base plate with its detection end facing the detection groove; and a positioning assembly fixed on the mounting base plate with its positioning end facing the positioning groove.
[0005] As an improvement to the above scheme, the depth of the detection groove in each group of positioning units is different, while the depth of the positioning groove in each group of positioning units is the same.
[0006] As an improvement to the above scheme, the depth of each of the detection grooves is distributed in an arithmetic progression, and the depth difference between adjacent detection grooves is 2mm.
[0007] As an improvement to the above solution, the positioning component includes: a directional drive unit, which is fixed to the mounting base plate by a fixing bracket; and a positioning pin, which is connected to the power output end of the directional drive unit.
[0008] As an improvement to the above solution, the directional drive unit includes: a track fixed to the fixed bracket; a slider slidably connected to the track, with the positioning pin fixed to the slider; and a lead screw motor fixed to the fixed bracket, with the power output end of the lead screw motor connected to the slider.
[0009] As an improvement to the above solution, the positioning component further includes: a first sensing element fixed to the fixed bracket, the first sensing element being disposed at the extension limit point of the positioning pin; and a second sensing element fixed to the fixed bracket, the second sensing element being disposed at the retraction limit point of the positioning pin.
[0010] As an improvement to the above solution, the positioning pin is provided with a first guide slope on the side away from the orientation drive unit, and the positioning groove is provided with a second guide slope that cooperates with the orientation drive unit.
[0011] As an improvement to the above solution, the positioning unit is provided in four groups, and the four groups of positioning units are evenly distributed along the circumference of the positioning disk.
[0012] As an improvement to the above solution, the ranging sensor is a laser ranging sensor.
[0013] As an improvement to the above solution, both the first sensing element and the second sensing element are photoelectric sensors or micro switches.
[0014] The beneficial effects of implementing this utility model are as follows: This invention discloses a centrifuge basket positioning device. It uses a distance sensor to identify and detect a groove, and then a positioning component engages with the groove for positioning. The device is simple in structure, easy to use, provides accurate positioning, and has low manufacturing costs. Furthermore, by detecting the basket's positioning position using the distance sensor, even after a power outage and restart of the centrifuge, the sensor data can still locate the basket that was positioned before the power outage, effectively ensuring the centrifuge can resume operation from its pre-power-out state. This device is inexpensive, reliable, and easy to maintain, effectively reducing basket positioning deviation and improving the reliability of the centrifuge during operation. Attached Figure Description
[0015] Figure 1 Figure 1 This is a schematic diagram of the structure of a centrifuge basket positioning device according to an embodiment of this application; Figure 2 This is a schematic diagram of the positioning disc of a centrifuge basket positioning device according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a positioning component of a centrifuge basket positioning device according to an embodiment of this application; Figure 4 This is an exploded view of the structure of the positioning component of a centrifuge basket positioning device according to an embodiment of this application; Figure 5 This is one of the working state diagrams of the positioning component of a centrifuge basket positioning device according to an embodiment of this application; Figure 6 This is the second working state diagram of the positioning component of a centrifuge basket positioning device in an embodiment of this application.
[0016] The reference numerals in the attached drawings are explained as follows: 100, drive motor; 110, suspended basket; 200, mounting base plate; 300, positioning plate; 310, detection groove; 320, positioning groove; 321, second guide slope; 400, distance sensor; 500, positioning component; 510, positioning pin; 511, first guide slope; 520, slide rail; 530, slider; 540, lead screw motor; 550, fixed bracket; 551, limiting component; 560, first sensing element; 570, second sensing element. Detailed Implementation
[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.
[0018] See Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a centrifuge basket positioning device according to an embodiment of this application; Figure 2 This is a schematic diagram of the positioning disk of a centrifuge basket positioning device according to an embodiment of this application. As shown in the figure, the device includes: a mounting base plate with a connecting hole in the middle; a drive motor with its power output end passing through the connecting hole and connected to the basket, the sample to be centrifuged being fixed in the basket; a positioning disk fixed on the main shaft of the drive motor and rotating synchronously with the basket; at least two sets of positioning units are provided around the positioning disk; each set of positioning units includes a detection groove and a positioning groove adjacent to each other on the outer edge of the positioning disk; a distance sensor fixed on the mounting base plate with its detection end facing the detection groove; and a positioning assembly fixed on the mounting base plate with its positioning end facing the positioning groove. The device identifies the detection groove using a distance sensor, and then positions the basket by cooperating with the positioning assembly. The structure is simple, easy to use, provides accurate positioning, and has low manufacturing cost. Furthermore, by detecting the basket's positioning position using a distance sensor, even after a power outage and restart of the centrifuge, the sensor data can still locate the basket to be positioned before the power outage, providing effective assurance for the centrifuge to return to its pre-power-out state and continue operation. This device is inexpensive, reliable, and easy to maintain. It effectively reduces the positioning deviation of the basket and improves the reliability of the centrifuge during operation.
[0019] See Figure 2Furthermore, in this embodiment, the depths of the detection grooves in each group of positioning units are different, while the depths of the positioning grooves in each group of positioning units are the same. Specifically, the depths of each detection groove are distributed in an arithmetic progression, and the depth difference between adjacent detection grooves is 2 mm.
[0020] Preferably, the positioning unit comprises four groups, which are evenly distributed along the circumference of the positioning disk. Mechanical position coding is achieved by setting multiple positioning grooves of different depths, with each depth corresponding to a unique suspended platform position.
[0021] See Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of the positioning component of a centrifuge basket positioning device according to an embodiment of this application; Figure 4 This is an exploded view of the positioning component of a centrifuge basket positioning device according to an embodiment of this application.
[0022] Furthermore, in this embodiment, the positioning component includes: an orientation drive unit, fixed to the mounting base plate by a fixing bracket; and a positioning pin, connected to the power output end of the orientation drive unit. Positioning is achieved by the orientation drive unit driving the positioning pin to engage with the positioning groove.
[0023] Furthermore, in this embodiment, the directional drive unit includes: a track fixed to the fixed bracket; a slider slidably connected to the track, with a positioning pin fixed to the slider; and a lead screw motor fixed to the fixed bracket, with the power output end of the lead screw motor connected to the slider. By using an integrated lead screw motor for drive, the unit occupies a small volume, has a fast response speed, and provides stable transmission.
[0024] Preferably, the fixed bracket is provided with two limiting members, one end of the limiting member is fixed to the fixed bracket, and the other end of the limiting member extends above the slider. The limiting member is used to vertically limit the slider.
[0025] Furthermore, in this embodiment, the positioning component further includes: a first sensor fixed to the fixed bracket, the first sensor being disposed at the extension limit point of the positioning pin; and a second sensor fixed to the fixed bracket, the second sensor being disposed at the retraction limit point of the positioning pin. Specifically, when the positioning pin extends into the positioning groove, the first sensor monitors the displacement of the positioning pin in real time; when the positioning pin reaches a preset extension limit position, i.e., the depth to which it is fully inserted into the positioning groove, the first sensor immediately sends a position signal to the control system. When the positioning pin retracts from the positioning groove, the second sensor monitors the displacement of the positioning pin in real time; when the positioning pin returns to a safe position completely detached from the positioning plate, the second sensor immediately sends a reset completion signal. The first and second sensors form a closed-loop position feedback system, ensuring that the terminal position of the positioning pin's extension and retraction is controllable and eliminating the risk of mechanical collision.
[0026] Preferably, both the first and second sensing elements are photoelectric sensors.
[0027] See Figure 2 and Figure 3 Furthermore, in this embodiment, a first guide slope is provided on the side of the positioning pin away from the orientation drive unit, and a second guide slope that cooperates with the orientation drive unit is provided at the entrance of the positioning groove. Specifically, the cross-section of the positioning pin gradually increases from one side of the orientation drive unit to the other side, forming two first guide slopes; by providing complementary guide slopes at the end of the positioning pin and the entrance of the positioning groove, the spindle braking deviation within ±2° is automatically corrected during insertion, avoiding the resonance risk of servo positioning.
[0028] Preferably, the ranging sensor is a laser ranging sensor. In other embodiments, the ranging sensor may also be an ultrasonic sensor or an infrared sensor.
[0029] See Figure 1 , Figure 5 and Figure 6 , Figure 5 This is one of the working state diagrams of the positioning component of a centrifuge basket positioning device according to an embodiment of this application; Figure 6 This is the second working state diagram of the positioning component of a centrifuge basket positioning device in the embodiments of this application; Furthermore, this embodiment provides a positioning method for a centrifuge basket positioning device, including the following steps: like Figure 5 As shown, the suspended platform is in a free position, and the drive motor drives the suspended platform to rotate; like Figure 1 As shown, when the ranging sensor detects the detection groove corresponding to the position of the basket that needs to be located, the spindle motor stops rotating; like Figure 6 As shown, the positioning pin extends, locks and positions the suspended platform, and completes the positioning. After positioning is completed, the positioning pin retracts, and the drive motor rotates the basket to perform positioning at the next position.
[0030] As can be seen from the above, the centrifuge basket positioning device of this utility model identifies and detects the groove through a distance sensor, and then positions the basket by cooperating with the positioning component in the positioning groove. It has a simple structure, is easy to use, provides accurate positioning, and has low manufacturing cost. Furthermore, by detecting the basket's positioning position through the distance sensor, even after the centrifuge has failed and restarted due to a power outage, the sensor data can still locate the basket that needed to be positioned before the power outage, providing effective assurance for the centrifuge to return to its pre-power-out state and continue operating. This device is inexpensive, reliable, and easy to maintain, effectively reducing basket positioning deviation and improving the reliability of the centrifuge during operation.
[0031] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.
Claims
1. A centrifuge basket positioning device, characterized in that, include: The mounting substrate has a connection hole in the middle. A drive motor, the power output end of which passes through a connection hole and is connected to the basket, and the sample to be centrifuged is fixed in the basket; A positioning disk is fixed on the main shaft of the drive motor and rotates synchronously with the basket. The positioning disk is provided with at least two sets of positioning units in the circumferential direction. Each set of positioning units includes a detection groove and a positioning groove that are adjacent to each other on the outer edge of the positioning disk. A ranging sensor is fixed on the mounting base plate, with the detection end of the ranging sensor facing the detection groove; A positioning component is fixed to the mounting base plate, with the positioning end of the positioning component facing the positioning groove.
2. The centrifuge basket positioning device according to claim 1, characterized in that, The depth of the detection groove in each group of positioning units is different from that of each other, while the depth of the positioning groove in each group of positioning units is the same.
3. The centrifuge basket positioning device according to claim 1, characterized in that, The depths of each detection groove are distributed in an arithmetic progression, and the depth difference between adjacent detection grooves is 2 mm.
4. The centrifuge basket positioning device according to claim 2, characterized in that, The positioning component includes: The orientation drive unit is fixed to the mounting base plate by a fixing bracket; The positioning pin is connected to the power output end of the directional drive unit.
5. The centrifuge basket positioning device according to claim 4, characterized in that, The directional drive unit includes: The track is fixed to the fixed bracket; A slider is slidably connected to the track, and the positioning pin is fixed to the slider; A lead screw motor is fixed to the fixed bracket, and the power output end of the lead screw motor is connected to the slider.
6. The centrifuge basket positioning device according to claim 4, characterized in that, The positioning component also includes: A first sensing element is fixed to the fixed bracket, and the first sensing element is disposed at the extension limit point of the positioning pin; The second sensing element is fixed to the fixed bracket and is disposed at the retraction limit point of the positioning pin.
7. The centrifuge basket positioning device according to claim 4, characterized in that, The positioning pin has a first guide slope on the side away from the orientation drive unit, and the positioning groove has a second guide slope that cooperates with the orientation drive unit.
8. The centrifuge basket positioning device according to claim 1, characterized in that, The positioning unit is provided in four groups, and the four groups of positioning units are evenly distributed along the circumference of the positioning disk.
9. The centrifuge basket positioning device according to claim 1, characterized in that, The ranging sensor is a laser ranging sensor.
10. The centrifuge basket positioning device according to claim 6, characterized in that, Both the first and second sensing elements are photoelectric sensors or micro switches.