Anti-overload mechanical protection device for rotor of centrifugal machine

Abstract

The utility model belongs to the field of centrifugal machines, and particularly relates to a centrifugal machine rotor anti-overload mechanical protection device which comprises a machine shell, a motor is fixedly installed at the bottom of the inner side of the machine shell, the tail end of an output shaft of the motor is fixedly connected with a rotor shaft, and the top of the rotor shaft is fixedly connected with a reagent tube frame. A ring seat is fixedly connected to the upper portion of the inner side of the machine shell, a plurality of speed sensors are arranged on the inner ring wall of the ring seat, the positions of the speed sensors correspond to the positions of the reagent tube frames, and a hollow seat is fixedly connected to the middle of the inner side of the machine shell. The rotating speed of the rotor is monitored in real time through the speed sensor, when overload is detected, the electric push rod pushes the linkage ring to enable the sliding pin to slide along the slope seat, the rubber brake block is forced to radially clamp the rotor shaft to realize mechanical braking, a motor is effectively prevented from being burnt or the rotor is prevented from being out of control, and equipment safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, specifically to a centrifuge rotor overload protection device. Background Technology

[0002] Centrifuges are widely used in biological, chemical, and medical fields to separate different components in liquid mixtures. During high-speed rotation, if the rotor becomes overloaded due to uneven load, sample overweight, or mechanical failure, it can lead to rotor imbalance, motor overload, or even equipment damage, posing a safety hazard.

[0003] A search revealed that a utility model patent with patent authorization announcement number CN204074280U discloses a centrifuge rotor and a centrifuge. The centrifuge rotor includes a turntable, a rotor seat, clamp A, clamp B, and a tube assembly. The turntable is mounted on the rotor seat, clamp A and clamp B are mounted on the turntable, and the tube assembly includes two centrifuge tubes. The two centrifuge tubes are arranged in a cross shape, stacked one on top of the other. The two ends of the centrifuge tubes are respectively mounted on clamp A, and clamp B is located on both sides of the middle of the centrifuge tubes.

[0004] Traditional centrifuges primarily rely on electronic sensors for overload protection, combined with a control system, to cut off power or reduce speed. However, purely electronic protection carries the risk of response delays or failures, potentially leading to untimely braking. Utility Model Content

[0005] The purpose of this invention is to provide a mechanical overload protection device for centrifuge rotors, which solves the problem of untimely braking of traditional purely electronic overload protection in centrifuges.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a centrifuge rotor overload protection device, comprising a housing, an electric motor fixedly installed at the bottom inner side of the housing, a rotor shaft fixedly connected to the end of the output shaft of the electric motor, a reagent tube rack fixedly connected to the top of the rotor shaft, a ring seat fixedly connected to the upper inner side of the housing, multiple speed sensors provided on the inner ring wall of the ring seat, the positions of the speed sensors corresponding to the positions of the reagent tube rack, a hollow seat fixedly connected to the middle inner side of the housing, multiple sliding columns slidably connected to the inner ring wall of the hollow seat, the sliding columns penetrating the hollow seat, a rubber brake block fixedly connected to one end of each sliding column, the rubber brake block abutting against the circumferential surface of the rotor shaft, an inclined seat fixedly connected to the other end of each sliding column, the inclined seat slidably connected inside the hollow seat, a sliding pin slidably connected to the bottom of the hollow seat, the sliding pin penetrating the hollow seat, the arc end of the sliding pin abutting against the inclined surface of the inclined seat, and a linkage ring fixedly connected to the lower end of the sliding pin.

[0007] Preferably, the upper and lower ends of the inclined seat are each provided with a ball bearing, which is slidably connected to the inner surface of the hollow seat. The ball bearing reduces the friction between the inclined seat and the hollow seat.

[0008] Preferably, a guide frame is fixedly connected to the inner bottom of the hollow seat, the horizontal part of the guide frame is slidably connected to the inclined seat, and a spring is provided inside the inclined seat. One end of the spring is fixedly connected to the guide frame, and the other end of the spring is fixedly connected to the inner surface of the inclined seat. The guide frame and spring provide guidance and auxiliary resetting for the inclined seat.

[0009] Preferably, there are multiple sliding pins, and the positions of the sliding pins correspond to the evenly distributed inclined seats. When multiple sliding pins are subjected to force, the thrust can be applied to the corresponding inclined seat.

[0010] Preferably, a magnetic ring is fixedly connected to the pin body of the sliding pin, and the magnetic ring is attracted to the inner surface of the hollow base. The magnetic ring provides a positioning function for the initial position of the sliding pin.

[0011] Preferably, an electric push rod is fixedly installed on the inner bottom of the housing. A push ring is fixedly connected to the end of the telescopic shaft of the electric push rod. A plurality of ball bearings are provided on the upper end of the push ring, and the ball bearings abut against the linkage ring. By pushing the push ring with the electric push rod, the thrust can be applied to the linkage ring through the ball bearings.

[0012] Preferably, a guide sleeve is fixedly connected to the bottom inner side of the housing, and a guide rod is slidably connected inside the guide sleeve. The guide rod is fixedly connected to the bottom of the push ring. The guide sleeve and guide rod provide a balanced force for the lifting and lowering of the push ring.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model monitors the rotor speed in real time through a speed sensor. When an overload is detected, the electric push rod pushes the linkage ring to make the sliding pin slide along the inclined seat, forcing the rubber brake block to radially clamp the rotor shaft to achieve mechanical braking, effectively preventing the motor from burning out or the rotor from going out of control, and improving equipment safety.

[0015] 2. This utility model sets ball bearings on the inclined seat. The low friction between the inclined seat and the ball bearings, combined with the guide frame and spring reset structure, ensures braking response speed and automatic reset after overload is released, providing double protection for the motor and rotor. Attached Figure Description

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2This utility model Figure 1 A front sectional view;

[0018] Figure 3 This utility model Figure 2 Enlarged view of point A;

[0019] Figure 4 This utility model Figure 2 A partial structural diagram.

[0020] In the diagram: 1. Housing; 2. Motor; 3. Rotor shaft; 4. Reagent tube rack; 5. Ring seat; 6. Speed ​​sensor; 7. Hollow seat; 8. Inclined seat; 9. Sliding column; 91. Rubber brake block; 10. Guide frame; 11. Spring; 12. Ball bearing 1; 13. Sliding pin; 14. Linkage ring; 15. Magnetic ring; 16. Electric push rod; 17. Push ring; 18. Ball bearing 2; 19. Guide sleeve; 20. Guide rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 , Figure 2 , Figure 4 The centrifuge rotor overload protection device includes a housing 1. A motor 2 is fixedly installed on the bottom inner side of the housing 1. A rotor shaft 3 is fixedly connected to the end of the output shaft of the motor 2. A reagent tube rack 4 is fixedly connected to the top of the rotor shaft 3. A ring seat 5 is fixedly connected to the upper inner side of the housing 1. Multiple speed sensors 6 are provided on the inner ring wall of the ring seat 5, and the positions of the speed sensors 6 correspond to the positions of the reagent tube rack 4. A hollow seat 7 is fixedly connected to the middle inner side of the housing 1. Multiple sliding columns 9 are slidably connected to the inner ring wall of the hollow seat 7, and the sliding columns 9 are set through the hollow seat 7. A rubber brake block 91 is fixedly connected to one end of the sliding column 9, and the rubber brake block 91 abuts against the circumferential surface of the rotor shaft 3. An inclined seat 8 is fixedly connected to the other end of the sliding column 9, and the inclined seat 8 is slidably connected inside the hollow seat 7.

[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4The inclined seat 8 has ball bearings 12 at both its upper and lower ends, which are slidably connected to the inner surface of the hollow seat 7. The ball bearings 12 reduce friction between the inclined seat 8 and the hollow seat 7. A guide frame 10 is fixedly connected to the bottom inner side of the hollow seat 7, and its horizontal part is slidably connected to the inclined seat 8. A spring 11 is installed inside the inclined seat 8; one end of the spring 11 is fixedly connected to the guide frame 10, and the other end is fixedly connected to the inner surface of the inclined seat 8. The guide frame 10 and spring 11 provide guidance and auxiliary resetting for the inclined seat 8. A sliding pin 13 is slidably connected to the bottom of the hollow seat 7, and the sliding pin 13 penetrates the hollow seat 7. The arc end of the sliding pin 13 abuts against the inclined surface of the inclined seat 8, and a linkage ring 14 is fixedly connected to the lower end of the sliding pin 13. Multiple sliding pins 13 are provided, and their positions correspond evenly to the number of inclined seats 8. When multiple sliding pins 13 are subjected to force, the thrust can be applied to the corresponding inclined seat 8. A magnetic ring 15 is fixedly connected to the pin body of the sliding pin 13, and the magnetic ring 15 is attracted to the inner surface of the hollow seat 7. The magnetic ring 15 provides a positioning function for the initial position of the sliding pin 13.

[0024] Please see Figure 2 An electric push rod 16 is fixedly installed on the inner bottom of the housing 1. A push ring 17 is fixedly connected to the end of the telescopic shaft of the electric push rod 16. Multiple ball bearings 18 are provided on the upper end of the push ring 17, and the ball bearings 18 abut against the linkage ring 14. Pushing the push ring 17 by the electric push rod 16 applies thrust to the linkage ring 14 through the ball bearings 18. A guide sleeve 19 is fixedly connected to the inner bottom of the housing 1. A guide rod 20 is slidably connected inside the guide sleeve 19 and fixedly connected to the bottom of the push ring 17. The guide sleeve 19 and guide rod 20 provide a balanced force for the lifting and lowering of the push ring 17.

[0025] The specific implementation process of this utility model is as follows: In use, the motor 2 drives the rotor shaft 3 to rotate, thereby driving the reagent tube rack 4 to rotate, and then centrifuging the blood sample in the reagent tube. At the same time, the speed sensor 6 monitors the rotation speed of the rotor shaft 3 and the reagent tube rack 4 in real time. When an overload is detected, the electric push rod 16 pushes the push ring 17. The push ring 17, through the linkage ring 14, causes each sliding pin 13 to slide along its corresponding inclined seat 8, thereby forcing the inclined seat 8 to drive the rubber brake block 91 to radially clamp the rotor shaft 3 through the sliding column 9, thereby achieving mechanical braking, effectively preventing the motor 2 from burning out or the rotor shaft 3 from going out of control, and improving the safety of the equipment. After the speed of the rotor shaft 3 stabilizes, the electric push rod 16 drives the push ring 17 to reset downward. The low friction of the inclined seat 8 and the ball bearing 12, combined with the guide frame 10 and the spring 11 reset structure, ensures both braking response speed and automatic reset after the overload is released, providing double protection for the motor 2 and the rotor shaft 3.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centrifuge rotor overload protection device, comprising a housing (1), characterized in that: A motor (2) is fixedly installed on the bottom inner side of the housing (1). A rotor shaft (3) is fixedly connected to the end of the output shaft of the motor (2). A reagent tube rack (4) is fixedly connected to the top of the rotor shaft (3). A ring seat (5) is fixedly connected to the upper inner side of the housing (1). Multiple speed sensors (6) are provided on the inner ring wall of the ring seat (5), and the positions of the speed sensors (6) correspond to the positions of the reagent tube rack (4). A hollow seat (7) is fixedly connected to the middle inner side of the housing (1). Multiple sliding columns (9) are slidably connected to the inner ring wall of the hollow seat (7), and the sliding columns (9) 9) The sliding column (9) is fixedly connected to a rubber brake block (91) at one end of the sliding column (9). The rubber brake block (91) abuts against the circumferential surface of the rotor shaft (3). The other end of the sliding column (9) is fixedly connected to an inclined seat (8). The inclined seat (8) is slidably connected to the inside of the hollow seat (7). The bottom of the hollow seat (7) is slidably connected to a sliding pin (13). The sliding pin (13) is fixedly connected to the hollow seat (7). The arc end of the sliding pin (13) abuts against the inclined surface of the inclined seat (8). The lower end of the sliding pin (13) is fixedly connected to a linkage ring (14).

2. The centrifuge rotor overload protection device according to claim 1, characterized in that: The upper and lower ends of the inclined seat (8) are provided with ball bearings (12), and the ball bearings (12) are slidably connected to the inner surface of the hollow seat (7).

3. The centrifuge rotor overload protection device according to claim 1, characterized in that: A guide frame (10) is fixedly connected to the bottom inner side of the hollow seat (7). The horizontal part of the guide frame (10) is slidably connected to the inclined seat (8). A spring (11) is provided inside the inclined seat (8). One end of the spring (11) is fixedly connected to the guide frame (10), and the other end of the spring (11) is fixedly connected to the inner surface of the inclined seat (8).

4. The centrifuge rotor overload protection device according to claim 1, characterized in that: The number of sliding pins (13) is set to multiple, and the position of the sliding pins (13) corresponds to the number of uniformly spaced inclined seats (8).

5. The centrifuge rotor overload protection device according to claim 1, characterized in that: A magnetic ring (15) is fixedly connected to the pin body of the sliding pin (13), and the magnetic ring (15) is attracted to the inner surface of the hollow seat (7).

6. The centrifuge rotor overload protection device according to claim 1, characterized in that: An electric push rod (16) is fixedly installed on the bottom inner side of the housing (1). A push ring (17) is fixedly connected to the end of the telescopic shaft of the electric push rod (16). A plurality of ball bearings (18) are provided on the upper end of the push ring (17), and the ball bearings (18) abut against the linkage ring (14).

7. The centrifuge rotor overload protection device according to claim 1, characterized in that: A guide sleeve (19) is fixedly connected to the bottom inner side of the housing (1), and a guide rod (20) is slidably connected inside the guide sleeve (19). The guide rod (20) is fixedly connected to the bottom of the push ring (17).

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