CN211436039U

CN211436039U - Magnetic stirrer

Info

Publication number: CN211436039U
Application number: CN201922434779.9U
Authority: CN
Inventors: 常婕; 郑一超; 井政
Original assignee: Zhengzhou Leye Biotechnology Co ltd
Current assignee: Zhengzhou Leye Biotechnology Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-08
Anticipated expiration: 2029-12-30

Abstract

The utility model provides a magnetic stirrer relates to the magnetic force field of mixing. The magnetic stirrer comprises a base, a motor, a rotary table and a rack, wherein a bearing plane is arranged at the upper part of the base, the motor is arranged at the lower side of the bearing plane, the rotary table is in rotation stopping connection with a main shaft of the motor, a magnetic block is fixed on the rotary table, and the rotating axis of the rotary table is perpendicular to the bearing plane; the frame sets up the planar outside of bearing, and the frame lies in the planar upside of bearing and is equipped with vertical actuating mechanism, and vertical actuating mechanism's bottom is rotated and is installed stirring rotor, and stirring rotor's axis of rotation coincides with the axis of rotation of carousel, and magnetic path and stirring rotor magnetic drive cooperate. The motor drives the turntable to rotate, so that the stirring rotor is driven to synchronously rotate; vertical actuating mechanism drives stirring rotor up-and-down motion along vertical direction to the realization drives stirring rotor and adjusts stirring height from top to bottom, stirs the mixing action with the liquid of the different degree of depth of drive, has guaranteed magnetic stirrers' stirring mixing effect.

Description

Magnetic stirrer

Technical Field

The utility model relates to a magnetic force mixing technical field especially relates to a magnetic stirrers.

Background

Magnetic stirrers are commonly used in laboratories and are mainly used for stirring and mixing low-viscosity liquids or solid-liquid mixtures.

Generally, a magnetic stirrer comprises a base, a motor and a rotary table adhered with magnetic blocks, the motor drives the rotary table provided with the magnetic blocks to rotate, and a stirring rotor rotates under the driving of the magnetic force of the magnetic blocks, so that liquid to be mixed in a container is stirred and mixed. However, the stirring rotor is directly placed in the container, and the problem of jumping due to unbalance of magnetic force is easily caused.

If the bulletin number is CN208194305U, the china utility model patent that the bulletin day is 2018.12.07 discloses a magnetic stirrers, and specifically disclosed magnetic stirrers include the drive base, the magneton, be located the support on the drive base and be located the heating module on the drive base, be provided with the branch that is located the horizontal direction on the support, the top of branch is provided with the installation pole of vertical drive base and directional drive base center, the diapire coaxial arrangement of installation pole has the mounting hole, it is provided with the turning block to slide in the mounting hole, turning block coaxial coupling has the turning bar that extends to outside the mounting hole, the magneton is connected with the bottom of turning bar, be provided with the stopper that can offset with the turning block in the mounting hole, the magneton rotation drives the turning bar and the turning block is rotatory, under the limiting displacement of mounting hole, the turning block can not produce and rock, thereby the magneton can keep stable rotation.

When the magnetic stirrer in the prior art is adopted, the magneton (equivalent to a stirring rotor) is coaxially connected to the bottom end of the rotating rod, and the stirring rotation is kept unchanged in the position of the rotation center through the rotating assembly between the rotating rod and the mounting rod, so that the problem of beating of the stirring rotor is prevented. However, the stirring rotor can only perform rotational stirring at a constant height, and the position cannot be adjusted up and down during the stirring process, which causes a problem of poor stirring and mixing effects on the liquid.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, an object of the utility model is to provide a magnetic stirrer to the stirring rotor who solves current magnetic stirrer only can rotate the stirring at invariable height, can not adjust the position at the stirring in-process from top to bottom, mixes the poor problem of effect to liquid stirring.

The technical proposal of the utility model is that:

the magnetic stirrer comprises a base, a motor, a rotary table and a rack, wherein a bearing plane is arranged at the upper part of the base, the motor is arranged at the lower side of the bearing plane, the rotary table is in rotation stopping connection with a main shaft of the motor, a magnetic block is fixed on the rotary table, and the rotating axis of the rotary table is perpendicular to the bearing plane;

the frame sets up the planar outside of bearing, the frame is located the planar upside of bearing and is equipped with vertical actuating mechanism, vertical actuating mechanism's bottom is rotated and is installed stirring rotor, stirring rotor's axis of rotation with the axis of rotation coincidence of carousel, the magnetic path is with stirring rotor magnetic drive cooperation.

Has the advantages that: a vertical driving mechanism is arranged on the rack, a stirring rotor is rotatably arranged at the bottom end of the vertical driving mechanism, the rotating axis of the stirring rotor is superposed with the rotating axis of the turntable, the turntable is driven to rotate by a motor, and the magnetic blocks on the turntable are in magnetic driving fit with the stirring rotor, so that the stirring rotor is driven to synchronously rotate; vertical actuating mechanism drives stirring rotor up-and-down motion along vertical direction to the realization drives stirring rotor and adjusts stirring height from top to bottom, stirs the mixing action with the liquid of the different degree of depth of drive, has guaranteed magnetic stirrers' stirring mixing effect.

Further, vertical actuating mechanism is the push rod motor, the push rod motor includes elevator motor and lift push rod, lift push rod extends along vertical downwardly extending, the stirring rotor rotates and installs the bottom at lift push rod.

Further, the frame is the frame of falling L shape, the vertical section and the base of the frame of falling L shape are connected, the horizontal segment of the frame of falling L shape is connected with the upper end of the vertical section of the frame of falling L shape, the horizontal segment overhang of the frame of falling L shape extremely directly over load-bearing platform.

Furthermore, the overhanging end of the inverted L-shaped frame is provided with a top mounting seat, and the push rod motor is arranged on the top mounting seat.

Furthermore, the middle part downside of stirring rotor is equipped with the abrasionproof arch, the assembly that floats from top to bottom of push rod motor is in on the top mount pad, the bellied bottom of abrasionproof is used for contradicting with the diapire of container in order to form the abrasionproof interval between the diapire of stirring rotor and container.

Furthermore, a vertically extending guide groove is formed in the top mounting seat, a sliding block is installed in the guide groove in a guiding mode, and the sliding block is fixedly connected with the push rod motor.

Further, the anti-abrasion bulge has a hemispherical outer contour.

Furthermore, the bottom of lift push rod is equipped with the bearing, stirring rotor is connected with the bearing.

Furthermore, the vertical driving mechanism is a gear rack mechanism, the gear rack mechanism comprises a gear motor, a gear arranged on a main shaft of the motor and a rack vertically and slidably arranged on the rack, the rack is meshed with the gear, and the stirring rotor is rotatably arranged at the bottom end of the rack.

Drawings

Fig. 1 is a schematic structural view of a magnetic stirrer according to embodiment 1 of the present invention;

fig. 2 is a schematic cross-sectional view at a-a in fig. 1.

In the figure: 1-base, 11-bearing plane, 2-main motor, 21-rotary table, 3-inverted L-shaped frame, 31-vertical section, 32-horizontal section, 33-top mounting seat, 330-guide groove, 4-push rod motor, 41-lifting push rod, 42-stirring rotor, 43-bearing, 44-anti-abrasion projection, 45-slide block and 5-container.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The utility model discloses a magnetic stirrers's embodiment 1, as shown in fig. 1, fig. 2, magnetic stirrers includes base 1, motor 2, carousel 21 and frame, is equipped with bearing plane 11 on base 1's upper portion, and in this embodiment, base 1 is hollow shell structure, and motor 2 installs in base 1's inside and is located bearing plane 11's downside, and motor 2's axis of rotation is vertical extension, and carousel 21 is fixed with the magnetic path on being connected and carousel 21 with motor 2's main shaft spline. Specifically, the turntable 21 is a circular turntable body, the rotation axis of the turntable 21 is also perpendicular to the bearing plane 11, two magnetic blocks are provided, the two magnetic blocks are respectively bonded and fixed at two sides of the turntable 21, the two magnetic blocks are symmetrically distributed about the rotation axis of the turntable, and the magnetic poles of the two magnetic blocks are arranged upside down, that is, the N pole of the magnetic block at one side faces upward, and the S pole of the magnetic block at the other side faces upward.

The frame sets up on the base 1 and is located the outside that bears plane 11, and the frame is located the upside that bears plane 11 and is equipped with vertical actuating mechanism, and vertical actuating mechanism's bottom is rotated and is installed stirring rotor 42, and stirring rotor 42's axis of rotation and the coincidence of the axis of rotation of carousel 21, the magnetic path on the carousel 21 and the cooperation of stirring rotor 42 magnetic drive. In this embodiment, the stirring rotor 42 is an ellipsoid, two ends of the stirring rotor 42 are respectively provided with a magnet with an N-pole arranged downward and a magnet with an S-pole arranged downward, the magnets in the stirring rotor 42 and the magnetic blocks on the turntable 21 form a magnetic action, that is, like magnetic poles repel and unlike magnetic poles attract, so that the stirring rotor 42 rotates synchronously with the turntable 21.

Wherein, vertical actuating mechanism is push rod motor 4, and push rod motor 4 includes lift motor and lift push rod 41, and lift push rod 41 extends along vertical downwardly extending, and stirring rotor 42 rotates and installs the bottom at lift push rod 41. Specifically, the push rod motor 4 is a linear push rod motor, the model of the linear push rod motor is ANT-35, the stroke of the linear push rod motor is 200mm, a group of reduction gear sets and a screw nut mechanism are arranged in the linear push rod motor, the main shaft 4 of the lifting motor is connected with the reduction gear sets in a rotation stopping mode, the reduction gear sets are used for reducing the speed and increasing the torque, then the rotation power is transmitted to the nuts, the nuts are driven to rotate, the nuts are in threaded fit with the screws, the screws are driven to perform linear motion, and the lifting push rod 41 and the screw rod inside the.

The motor end of the push rod motor 4 is installed on the frame, and the lifting push rod 41 of the push rod motor 4 moves up and down along the vertical direction, so that the stirring height can be adjusted up and down by driving the stirring rotor 42, liquid at different depths can be driven to perform stirring and mixing effects, and the stirring and mixing effects of the magnetic stirrer are guaranteed. And, the bottom end of the lifting push rod 41 of the push rod motor 4 is provided with a bearing 43, the stirring rotor 42 is fixedly connected with the bearing, wherein, the inner ring of the bearing 43 is fixedly connected with the lifting push rod 41, the outer ring of the bearing 43 is fixedly connected with the stirring rotor 42, a roller is arranged between the inner ring and the outer ring of the bearing 43, the rotation friction force of the stirring rotor 42 is reduced by arranging the bearing 43, and the magnetic block on the turntable 21 can be ensured to effectively drive the stirring rotor 42 to rotate.

In this embodiment, the frame is inverted L-shaped frame 3, and inverted L-shaped frame 3 includes vertical section 31 and horizontal segment 32, and the vertical section 31 and the base 1 of inverted L-shaped frame 3 are connected, and the horizontal segment 32 and the upper end of the vertical section 31 of inverted L-shaped frame 3 are connected to the horizontal segment 32 overhang of inverted L-shaped frame 3 is to load-bearing platform 11 directly over. The overhanging end of the inverted L-shaped frame 3 is provided with a top mounting seat 33, the vertical driving mechanism is arranged on the top mounting seat 33, namely, the push rod motor 4 is arranged right above the corresponding bearing platform 11, and the stirring rotor 42 is ensured to be capable of lifting along the rotating axis of the turntable 21 all the time.

In order to prevent the stirring rotor 42 from descending to the bottom of the container 5 and rotating on the bottom wall of the container 5 to cause friction wear, an anti-abrasion protrusion 44 is arranged at the lower side of the middle part of the stirring rotor 42, the push rod motor 4 is assembled on the top mounting seat 33 in a vertically floating manner, and the bottom end of the anti-abrasion protrusion 44 is used for interfering with the bottom wall of the container 5 to form an anti-abrasion interval between the stirring rotor 42 and the bottom wall of the container 4. When the stirring rotor 42 descends to the bottom of the container 5 along with the lifting push rod 41, the anti-abrasion bulge 44 contacts with the bottom wall of the container 5 and supports the stirring rotor 42, and the anti-abrasion bulge 44 is positioned in the middle of the stirring rotor 42 and is equivalent to a rotation fulcrum, so that the problem of friction and abrasion between the stirring rotor 42 and the bottom wall of the container 4 is solved. Specifically, the anti-wear protrusions 44 have a hemispherical outer contour, and the hemispherical outer contour can provide a more stable supporting function for the stirring rotor 42 rotating at a high speed.

The top mounting seat 33 is provided with a guide groove 330 extending vertically, a slide block 45 is installed in the guide groove 330 in a guiding manner, and the slide block 45 is fixedly connected with the motor end of the push rod motor 4. Wherein, the guide slot 330 has two parallel arrangement, and the cross section of slider 45 is the type of protruding, and is corresponding, and the inside of guide slot 330 has the channel with slider 45 unsmooth complex to the outside of channel is equipped with and keeps off the complex fender edge with the both wings part of slider 45, and the middle part protruding part of slider 45 stretches out and links to each other with the motor end of push rod motor 4 from the inside of channel. When the stirring rotor 42 is in the suspension state, the push rod motor 4 is kept at the bottom position of the guide groove 330 under the action of gravity, and along with the downward extension of the lifting push rod 41 until the anti-abrasion protrusion 44 of the stirring rotor 42 butts against the bottom of the container 5, the motor end of the push rod motor 4 is jacked upwards under the supporting action of the anti-abrasion protrusion 44, and under the guiding and matching action of the sliding block 45 and the guide groove 330, the motor end of the push rod motor 4 slides upwards, so that the push rod motor 4 is prevented from continuously outputting the lifting push rod 41 to press and crush the container 5.

It should be noted that the push rod motor 4 is further provided with a stroke controller, the stroke controller controls the operation of the lifting motor, the stroke controller stores an upper stirring limit position, a lower stirring limit position and a retracting position, and the lower stirring limit position, the upper stirring limit position and the retracting position are sequentially arranged from bottom to top. When the stroke controller controls the stirring rotor 42 to be at the lower stirring limit position, the anti-abrasion protrusions 44 abut against the bottom wall of the container 5, and at the moment, the magnetic blocks of the turntable 21 drive the stirring rotor 42 to rotate by maximum magnetic force; when the stroke controller controls the stirring rotor 42 to be at the upper stirring limit position, the stirring rotor 42 is suspended in the container 5 close to the upper surface of the liquid, and the magnetic blocks of the turntable 21 cannot drive the stirring rotor 42 through magnetic force due to the vertical distance, and the liquid on the upper layer is continuously stirred only by the rotation inertia of the stirring rotor 42; after the stirring operation is completed, the stroke controller controls the stirring rotor 42 to ascend to the retracting position, at this time, the stirring rotor 42 is separated from the liquid and is located on the upper side of the container 5, and the worker can directly take the container 5 away from the bearing plane 11.

The utility model discloses a magnetic stirrers's other embodiments, in order to adapt to different user demands, can replace the push rod motor among embodiment 1 into rack and pinion mechanism, rack and pinion mechanism includes gear motor, installs at the epaxial gear of the main shaft of motor, vertical slidable mounting rack in the frame, rack and gear engagement cooperation, and the bottom at the rack is installed in the stirring rotor rotation. The gear rack mechanism can also drive the stirring rotor to move up and down, so that liquids with different heights can be stirred and mixed.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A magnetic stirrer is characterized by comprising a base, a motor, a rotary table and a rack, wherein a bearing plane is arranged at the upper part of the base, the motor is arranged at the lower side of the bearing plane, the rotary table is in rotation stopping connection with a main shaft of the motor, a magnetic block is fixed on the rotary table, and the rotating axis of the rotary table is perpendicular to the bearing plane;

the frame sets up in the planar outside of bearing, the frame is located the planar upside of bearing and is equipped with vertical actuating mechanism, vertical actuating mechanism's bottom is rotated and is installed stirring rotor, stirring rotor's axis of rotation with the axis of rotation coincidence of carousel, the magnetic path is with stirring rotor magnetic drive cooperation.

2. The magnetic stirrer according to claim 1, wherein the vertical driving mechanism is a push rod motor, the push rod motor comprises a lifting motor and a lifting push rod, the lifting push rod extends downwards along the vertical direction, and the stirring rotor is rotatably mounted at the bottom end of the lifting push rod.

3. The magnetic stirrer according to claim 2, wherein the frame is an inverted L-shaped frame, a vertical section of the inverted L-shaped frame is connected with the base, a horizontal section of the inverted L-shaped frame is connected with an upper end of the vertical section of the inverted L-shaped frame, and the horizontal section of the inverted L-shaped frame overhangs to a position right above the bearing plane.

4. A magnetic stirrer according to claim 3, wherein the overhanging end of the inverted L-shaped frame is provided with a top mount on which the push rod motor is arranged.

5. The magnetic stirrer of claim 4, wherein the lower side of the middle part of the stirring rotor is provided with an anti-abrasion protrusion, the push rod motor is assembled on the top mounting seat in a vertically floating manner, and the bottom end of the anti-abrasion protrusion is used for abutting against the bottom wall of the container so as to form an anti-abrasion interval between the stirring rotor and the bottom wall of the container.

6. The magnetic stirrer according to claim 5, wherein the top mounting base is provided with a vertically extending guide groove, the guide groove is provided with a slide block in a guiding manner, and the slide block is fixedly connected with the push rod motor.

7. Magnetic stirrer according to claim 5, characterized in that the wear protection has a hemispherical outer contour.

8. A magnetic stirrer according to any one of claims 2 to 7, wherein the bottom end of the lifting push rod is provided with a bearing, and the stirring rotor is connected with the bearing.

9. The magnetic stirrer according to claim 1, wherein the vertical driving mechanism is a rack and pinion mechanism, the rack and pinion mechanism comprises a gear motor, a gear mounted on a main shaft of the motor, and a rack vertically slidably mounted on the frame, the rack is engaged with the gear, and the stirring rotor is rotatably mounted at the bottom end of the rack.