Planetary mixer

Abstract

The utility model relates to a planetary stirrer, which belongs to the technical field of laboratory equipment and comprises a stirrer body, a stirring rod mounted in the stirrer body, a stirring paddle detachably arranged at the bottom of the stirring rod and a fixing mechanism arranged between the stirring rod and the stirring paddle. A fixing hole is formed in the square rod; according to the utility model, the stirring rod and the stirring paddle can be preliminarily connected by inserting the square rod into the stirring rod, and the threaded rod can be quickly inserted into the fixing hole of the square rod through the tension of the tension spring, so that the stirring rod and the stirring paddle are mounted and fixed, and the contact area between the threaded rod serving as a fixing part and the square rod is large; therefore, the threaded rod can bear larger pressure and is not prone to damage, the threaded rod can be screwed down from the interior of the connecting plate, the threaded rod can be replaced conveniently, and the difficulty of later maintenance is lowered.

Description

Technical Field

[0001] This utility model belongs to the field of laboratory equipment technology, specifically relating to a planetary mixer. Background Technology

[0002] Laboratory planetary mixers are widely used mixing equipment in laboratory environments. They utilize the principle of planetary motion for efficient mixing and are suitable for processes such as mixing, dispersing, dissolving, and homogenizing various pastes, liquids, and powders.

[0003] Patent CN221015570U discloses "a double planetary mixer, belonging to the field of laboratory equipment technology, including a mixer body, a stirring rod coaxially fixedly connected to one end face of the drive rod of the mixer body, an installation hole opened on one end face of the stirring rod, a stirring shaft inserted into the installation hole, a stirring blade fixedly connected to the outer wall of the stirring shaft, and a locking mechanism for locking the stirring shaft to the inner wall of the installation hole on the lower end outer wall of the stirring rod. This utility model has the advantage of making it convenient for the operator to disassemble the stirring shaft for cleaning."

[0004] Although the existing technology allows for the rapid replacement of the impeller consisting of the stirring shaft and the stirring blades, and the replacement impeller is fixed by the compression of the ball bearings, the contact area between the ball bearings and the replacement impeller is small. After prolonged use, the ball bearings are prone to wear due to excessive force. Furthermore, since the ball bearings are located inside the stirring rod, subsequent replacement of the ball bearings is inconvenient and increases the difficulty of later maintenance, which requires improvement. Utility Model Content

[0005] The purpose of this invention is to provide a planetary mixer in order to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A planetary mixer includes a mixer body, a stirring rod installed in the mixer body, a stirring paddle detachably installed at the bottom of the stirring rod, and a fixing mechanism between the stirring rod and the stirring paddle. The top of the stirring paddle is fixedly provided with a square rod that is inserted into the bottom of the stirring rod, and the square rod has a fixing hole.

[0008] The fixing mechanism includes a tension spring fixed to the outer wall of the bottom end of the stirring rod, a connecting plate fixed to one end of the tension spring, and a threaded rod threaded in the connecting plate. One end of the threaded rod passes through the stirring rod and is inserted into the fixing hole. The outside of the stirring rod is provided with an anti-loosening mechanism to prevent the threaded rod from loosening.

[0009] As a further optimization of this utility model, a square hole is provided at the bottom end of the stirring rod, and the square rod is inserted into the square hole of the stirring rod.

[0010] As a further optimization of this utility model, the anti-loosening mechanism includes a limiting cylinder fixedly disposed on the outer wall of the stirring rod and a ball valve installed in a through hole opened at the top of the stirring rod. The connecting plate is slidably disposed on the inner side of the matching limiting cylinder, and the tension spring is located inside the limiting cylinder.

[0011] As a further optimization of this utility model, a gripping rod located outside the limiting cylinder is fixedly provided on the outer wall of one end of the threaded rod, and a counterweight is fixedly provided at the bottom of the end of the stirring rod away from the limiting cylinder.

[0012] As a further optimization of this utility model, an air guiding channel is provided inside the stirring rod, and the two ends of the air guiding channel are respectively connected to the top of the square hole and the inside of the limiting cylinder.

[0013] As a further optimization of this utility model, sealing rings are fixedly installed on the top of the square rod and the outer wall of the connecting plate, respectively.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. By inserting the square rod into the stirring rod, the stirring rod and the stirring paddle can be initially connected. The tension of the spring can quickly insert the threaded rod into the fixing hole of the square rod, thereby installing and fixing the stirring rod and the stirring paddle. As a fixing component, the threaded rod has a large contact area with the square rod, which allows the threaded rod to withstand greater pressure and is not easily damaged. In addition, the threaded rod can be unscrewed from the connecting plate, which facilitates the replacement of the threaded rod and reduces the difficulty of later maintenance.

[0016] 2. By limiting the connecting plate with the limiting cylinder and sealing it with the sealing ring, a sealed space can be formed inside the limiting cylinder to limit the threaded rod and other components. This prevents the threaded rod from dislodging from the fixing hole under centrifugal force when the stirring rod rotates, thus preventing the threaded rod from loosening. When the stirring paddle is removed, the air inside the limiting cylinder can be pushed into the square hole through the air guide channel by pushing and pulling the threaded rod, thereby cleaning the square hole by blowing air. This is convenient and practical. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a utility model Figure 1 Enlarged view of the A-structure;

[0019] Figure 3 This is a schematic diagram of the internal connection of a partial structure of the stirring rod and stirring paddle of this utility model;

[0020] Figure 4 This is a utility model Figure 3 Enlarged view of the B-structure.

[0021] In the diagram: 1. Mixer body; 11. Mixing rod; 12. Square hole; 13. Counterweight; 2. Mixing paddle; 21. Square rod; 22. Fixing hole; 3. Tension spring; 31. Connecting plate; 32. Threaded rod; 33. Handle; 34. Limiting cylinder; 35. Ball valve; 36. Air guide channel; 37. Sealing ring. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] Example

[0024] like Figure 1-4 As shown, a planetary mixer includes a mixer body 1, a stirring rod 11, a stirring paddle 2, and a fixing mechanism. The stirring rod 11 is installed inside the mixer body 1, and the stirring paddle 2 is detachably mounted on the bottom of the stirring rod 11. The fixing mechanism is located between the stirring rod 11 and the stirring paddle 2, and can fix the stirring rod 11 and the stirring paddle 2 in place. The mixer body 1 can drive the stirring paddle 2 to rotate through the stirring rod 11, thereby mixing various materials in the laboratory. The mixer body 1 and the stirring rod 11 constitute the main structure of the planetary mixer. Its stirring principle is a publicly available technology and will not be described in detail here.

[0025] like Figure 1-3 As shown, a square rod 21 is fixedly provided on the top of the stirring paddle 2 and is inserted into the bottom of the stirring rod 11. A fixing hole 22 is provided in the square rod 21, and a square hole 12 is provided in the bottom end of the stirring rod 11. The square rod 21 is inserted into the square hole 12 of the stirring rod 11. The stirring rod 11 can be connected to the square rod 21 through the square hole 12. The square rod 21 can connect the stirring paddle 2 and the stirring rod 11, so that the stirring rod 11 will drive the stirring paddle 2 to rotate when it rotates. By inserting the square rod 21 into the square hole 12 of the stirring rod 11, the stirring rod 11 and the stirring paddle 2 can be initially connected.

[0026] like Figure 2-3As shown, the fixing mechanism includes a tension spring 3 fixedly installed on the outer wall of the bottom end of the stirring rod 11, a connecting plate 31 fixedly installed on one end of the tension spring 3, and a threaded rod 32 threaded in the connecting plate 31. One end of the threaded rod 32 passes through the stirring rod 11 and is inserted into the fixing hole 22. The connecting plate 31 can connect the tension spring 3 and the threaded rod 32. A gripping rod 33 located outside the limiting cylinder 34 is fixedly installed on the outer wall of one end of the threaded rod 32. By gripping the gripping rod 33, the threaded rod 32 can be rotated. The tension of the tension spring 3 can quickly insert the threaded rod 32 into the fixing hole 22 of the square rod 21, thereby installing and fixing the stirring rod 11 and the stirring paddle 2. The threaded rod 32 can be unscrewed from the threaded connecting plate 31, which facilitates the replacement of the damaged threaded rod 32 and reduces the difficulty of later maintenance.

[0027] like Figure 2-3 As shown, the outer side of the stirring rod 11 is provided with an anti-loosening mechanism to prevent the threaded rod 32 from loosening. The anti-loosening mechanism includes a limiting cylinder 34 fixedly installed on the outer wall of the stirring rod 11 and a ball valve 35 installed in the through hole opened at the top of the stirring rod 11. The connecting plate 31 is slidably installed on the inner side of the matching limiting cylinder 34. The tension spring 3 is located inside the limiting cylinder 34. When the threaded rod 32 is pushed or pulled, the ball valve 35 can be rotated to make the through hole of the stirring rod 11 unobstructed, so as to balance the air pressure inside and outside the limiting cylinder 34, thereby not hindering the movement of the threaded rod 32 and other components.

[0028] By limiting the connecting plate 31 with the limiting cylinder 34 and rotating the ball valve 35 in the opposite direction to close the through hole of the stirring rod 11, a sealed space can be formed in the limiting cylinder 34 to limit the threaded rod 32 and other components. When the stirring rod 11 rotates, the pressure inside and outside the limiting cylinder 34 restricts the threaded rod 32 and other components from coming off the fixing hole 22 under the centrifugal force of the rotating stirring rod 11, thereby preventing the threaded rod 32 from loosening.

[0029] like Figure 2-3 As shown, a counterweight 13 is fixedly provided at the bottom of the end of the stirring rod 11 away from the limiting cylinder 34. The counterweight 13 can roughly balance the weight on both sides of the stirring rod 11, so as to prevent the stirring rod 11 from rotating unstably due to excessive weight on the limiting cylinder 34 side.

[0030] like Figure 2-4As shown, an air guide channel 36 is provided inside the stirring rod 11. The two ends of the air guide channel 36 are respectively connected to the top of the square hole 12 and the inside of the limiting cylinder 34. A sealing ring 37 is fixedly installed on the top of the square rod 21 and the outer wall of the connecting plate 31. The sealing ring 37 can seal between the square rod 21 and the square hole 12, and between the connecting plate 31 and the limiting cylinder 34. When the stirring paddle 2 is removed, the operator can push and pull the threaded rod 32 to move the connecting plate 31, so as to push the air in the limiting cylinder 34 into the square hole 12 through the air guide channel 36, thereby blowing and cleaning the square hole 12, reducing the cleaning intensity of the square hole 12 by the operator later.

[0031] It should be noted that when installing the mixing paddle 2 in this planetary mixer, the ball valve 35 can be rotated first to unblock the through hole of the mixing rod 11 to balance the air pressure inside and outside the limiting cylinder 34. Then, the threaded rod 32 is pulled to the side away from the mixing rod 11, and then the square rod 21 is inserted into the square hole 12 of the mixing rod 11 to make a preliminary connection between the mixing rod 11 and the mixing paddle 2.

[0032] Next, loosen the threaded rod 32. The tension of the tension spring 3 can quickly insert the threaded rod 32 into the fixing hole 22 of the square rod 21, thereby installing and fixing the stirring rod 11 and the stirring paddle 2. The threaded rod 32 can be unscrewed from the threaded connection plate 31, which makes it easy to replace the damaged threaded rod 32 and reduces the difficulty of later maintenance.

[0033] Then, the ball valve 35 is rotated in the opposite direction to close the through hole of the stirring rod 11. With the sealing of the sealing ring 37, a sealed space can be formed in the limiting cylinder 34 to limit the threaded rod 32 and other components. When the stirring rod 11 rotates, the pressure inside and outside the limiting cylinder 34 limits the threaded rod 32 and other components to prevent them from coming off the fixing hole 22 under the centrifugal force of the rotating stirring rod 11 after the planetary mixer is running. This prevents the threaded rod 32 from loosening.

[0034] Furthermore, when the mixing paddle 2 is removed, the staff can move the connecting plate 31 by pushing and pulling the threaded rod 32, and use the air guide channel 36 to push the air in the limiting cylinder 34 into the square hole 12, thereby blowing and cleaning the square hole 12, reducing the cleaning intensity of the square hole 12 for the staff later.

[0035] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A planetary mixer, comprising a mixer body (1), a stirring rod (11) installed inside the mixer body (1), a stirring paddle (2) detachably disposed at the bottom of the stirring rod (11), and a fixing mechanism disposed between the stirring rod (11) and the stirring paddle (2), characterized in that: The top of the stirring paddle (2) is fixedly provided with a square rod (21) that is inserted into the bottom of the stirring rod (11), and a fixing hole (22) is provided in the square rod (21); The fixing mechanism includes a tension spring (3) fixed on the outer wall of the bottom end of the stirring rod (11), a connecting plate (31) fixed on one end of the tension spring (3), and a threaded rod (32) threaded in the connecting plate (31). One end of the threaded rod (32) passes through the stirring rod (11) and is inserted into the fixing hole (22). The outside of the stirring rod (11) is provided with an anti-loosening mechanism to prevent the threaded rod (32) from loosening.

2. A planetary mixer according to claim 1, characterized in that: A square hole (12) is provided at the bottom end of the stirring rod (11), and the square rod (21) is inserted into the square hole (12) of the stirring rod (11).

3. A planetary mixer according to claim 2, characterized in that: The anti-loosening mechanism includes a limiting cylinder (34) fixed on the outer wall of the stirring rod (11) and a ball valve (35) installed in a through hole at the top of the stirring rod (11). The connecting plate (31) is slidably disposed on the inner side of the matching limiting cylinder (34), and the tension spring (3) is located inside the limiting cylinder (34).

4. A planetary mixer according to claim 3, characterized in that: One end of the threaded rod (32) is fixedly provided with a handle (33) located outside the limiting cylinder (34), and the bottom of the end of the stirring rod (11) facing away from the limiting cylinder (34) is fixedly provided with a counterweight (13).

5. A planetary mixer according to claim 3, characterized in that: The stirring rod (11) has an air guiding channel (36) inside, and the two ends of the air guiding channel (36) are respectively connected to the top of the square hole (12) and the inside of the limiting cylinder (34).

6. A planetary mixer according to claim 5, characterized in that: The top of the square rod (21) and the outer wall of the connecting plate (31) are respectively fixedly installed with sealing rings (37).

Images