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CN-224208244-U - Self-locking driving mechanism applied to centrifugal machine

CN224208244UCN 224208244 UCN224208244 UCN 224208244UCN-224208244-U

Abstract

The utility model relates to the technical field of centrifuges, in particular to a self-locking driving mechanism applied to a centrifuger, which is characterized in that a sliding block obliquely downwards arranged on the surface of a sliding column is matched with the limit of a sliding hole on a driving seat to the sliding block and the limit of an upper pressing block and an elastic element spring to the sliding column, so that the vertical motion of the sliding column is converted into the horizontal motion of the sliding block, and then the sliding column is slightly pressed down through a clamping ring groove matched with the sliding block in a central sleeve of a rotating head, so that the angular rotating head or the horizontal rotating head can be quickly disassembled or quickly installed.

Inventors

  • SHI LI
  • WU YURONG
  • WU LIWEN
  • LI MULIN
  • WEI QIANG

Assignees

  • 湖南湘仪实验室仪器开发有限公司

Dates

Publication Date
20260508
Application Date
20250603

Claims (8)

  1. 1. A self-locking drive mechanism for use with a centrifuge, comprising: The self-locking drive (a) is used for connecting the motor main shaft (b) and the rotary head (c), the self-locking drive (a) comprises a drive seat (2), and the drive seat (2) is arranged on the motor main shaft (b) through a connecting piece; A central sleeve (10) is arranged on the inner wall of a central hole of the rotating head (c), and a butt joint hole which is matched with the surface of the driving seat (2) is formed in the inner wall of the central sleeve (10); The top of the driving seat (2) is provided with an installation cavity, a sliding column (1) is movably inserted in the installation cavity of the driving seat (2), the sliding column (1) comprises a column body (1.3), the surface of the column body (1.3) is obliquely and downwards connected with a plurality of symmetrically arranged sliding blocks (3) in a sliding manner, and the surface of the driving seat (2) is provided with sliding holes (2.3) matched with the sliding blocks (3); The inner wall of the butt joint hole of the center sleeve (10) is provided with a clamping ring groove (10.1) corresponding to the sliding block (3), and the sliding block (3) horizontally slides in the sliding hole (2.3) through lifting of the sliding column (1).
  2. 2. The self-locking driving mechanism applied to the centrifugal machine, as set forth in claim 1, characterized in that an upper pressing block (6) for limiting the highest position of the sliding column (1) in the vertical direction is mounted on the top of the driving seat (2) through a supporting table (2.5) mounted on the inner wall of the mounting cavity, and an elastic element is mounted between the inner wall of the mounting cavity and the sliding column (1) and used for enabling the sliding column (1) to be at the highest position when no external force is applied.
  3. 3. A self-locking driving mechanism applied to a centrifugal machine according to claim 2, wherein the elastic element is a spring (5), the connecting piece is a central column (4) inserted in the center of the spring (5) and the installation cavity, and part of the central column (4) penetrates through the bottom of the driving seat (2) and is connected with a motor spindle (b).
  4. 4. The self-locking driving mechanism applied to the centrifugal machine according to claim 3, wherein the center of the sliding column (1) is provided with a column cavity (1.1) matched with the center column (4), the center column (4) is inserted into the column cavity (1.1), and the bottom of the column cavity (1.1) is provided with a limiting groove for limiting the spring (5).
  5. 5. The self-locking driving mechanism applied to the centrifugal machine, which is disclosed in claim 2, is characterized in that a conical butt joint hole (2.1) matched with a main shaft conical surface (9) of a main shaft (b) of a motor is formed in the bottom of the driving seat (2), a driving conical surface (2.2) matched with the inner wall of the center sleeve (10) is formed on the surface of the driving seat (2), and the upper section of the driving seat (2) is provided with a guiding inclined surface (2.4).
  6. 6. A self-locking driving mechanism applied to a centrifugal machine according to claim 1 is characterized in that the sliding column (1) and the sliding block (3) are connected in a sliding mode through a T-shaped rail (1.2) arranged on the surface of the sliding column (1) and a T-shaped groove (3.4) arranged on the sliding block (3), and the T-shaped rail (1.2) and the T-shaped groove (3.4) form a guide rail pair.
  7. 7. The self-locking driving mechanism applied to the centrifugal machine, as set forth in claim 2, is characterized in that the outer side of the sliding block (3) is provided with a compression inclined plane (3.3), an expanding surface (3.2) matched with the clamping ring groove (10.1) is formed at the bottom of the outer side of the inclined plane of the sliding block (3) in a protruding mode, a pressing inclined plane (3.1) is formed at the bottom of the expanding surface (3.2) in an inward inclined mode, and a ring groove inclined plane (10.2) matched with the pressing inclined plane (3.1) is arranged on the inner wall of the clamping ring groove (10.1).
  8. 8. The self-locking driving mechanism applied to the centrifugal machine according to claim 2, wherein the rotating head (c) is further provided with a push rod (8) connected with the top of the sliding column (1), and a button (7) for driving the push rod (8) is arranged on the top of the push rod (8).

Description

Self-locking driving mechanism applied to centrifugal machine Technical Field The utility model relates to the technical field of centrifuges, in particular to a self-locking driving mechanism applied to a centrifuge. Background The self-locking driving mechanism of the domestic centrifugal machine mainly utilizes the elastic force of the elastic sheet to slightly push out the movable stop dog to expand the rotary head and transmits torque to drive the rotary head to rotate through the needle rollers, and the self-locking driving has the defects that 1, the quality of self-locking performance is influenced by the quality of the elastic sheet, the locking effect is high in randomness after long-time use, and 2, the structure is asymmetric, so that the unbalance amount is increased along with the increase of the rotating speed, and the dynamic performance is further influenced. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a self-locking driving mechanism applied to a centrifugal machine. The utility model relates to a self-locking driving mechanism applied to a centrifugal machine, which comprises: the self-locking drive is used for connecting the motor spindle and the rotary head, and comprises a drive seat which is arranged on the motor spindle through a connecting piece; A central sleeve is arranged on the inner wall of the central hole of the rotating head, and a butt joint hole which is matched with the surface of the driving seat is formed in the inner wall of the central sleeve; The top of the driving seat is provided with an installation cavity, a sliding column is movably inserted in the installation cavity of the driving seat, the sliding column comprises a column body, the surface of the column body is obliquely downwards connected with a plurality of symmetrically arranged sliding blocks in a sliding manner, and the surface of the driving seat is provided with sliding holes matched with the sliding blocks; The inner wall of the butt joint hole of the center sleeve is provided with a clamping ring groove corresponding to the sliding block, and the sliding block can smoothly move in the sliding hole through lifting of the sliding column. The top of the driving seat is provided with an upper pressing block used for limiting the highest position of the sliding column in the vertical direction through a supporting table of the inner wall of the installation cavity, an elastic element is arranged between the inner wall of the installation cavity and the sliding column, and the elastic element is used for enabling the sliding column to be at the highest position when no external force is applied. The elastic element is a spring, the connecting piece is a central column inserted in the centers of the spring and the installation cavity, and part of the central column penetrates through the bottom of the driving seat and is connected with the motor spindle. The center of the sliding column is provided with a column cavity matched with the center column, the center column is inserted into the column cavity, and the bottom of the column cavity is provided with a limiting groove for limiting the spring. The bottom of the driving seat is provided with a conical butt joint hole matched with the conical surface of the main shaft of the motor main shaft, the surface of the driving seat is provided with a driving conical surface matched with the inner wall of the center sleeve, and the upper section of the driving seat is provided with a guide inclined surface. The sliding column is connected with the sliding block in a sliding way through a T-shaped rail arranged on the surface of the sliding column and a T-shaped groove arranged on the sliding block, and the T-shaped rail and the T-shaped groove form a guide rail pair. Specifically, the outside of slider is the compression inclined plane setting, the inclined plane outside bottom of slider is protruding to be formed with the tight face that expands with joint annular looks adaptation, the bottom of tight face that expands inwards inclines to be formed with the slant of pushing down, be equipped with the annular inclined plane with pushing down inclined plane looks adaptation on the inner wall of joint annular. Further, the rotary head is also provided with a push rod connected with the top of the slide column, and the top of the push rod is provided with a button for driving the push rod. Compared with the prior art, the utility model has the following beneficial effects: 1. When the self-locking driving mechanism rotates with the rotating head, each symmetrical sliding block has tiny peristalsis towards the periphery under the action of centrifugal force, so that the central sleeve connected with the rotating head is better and redundantly expanded and compressed, the expansion and compression force is increased along with the increase of the rotating speed, and the rotating head is more firmly locked when rotati