Blade adjusting structure and stirrer

Abstract

The present invention relates to the technical field of stirrers, and discloses a blade adjustment structure and a stirrer, the blade adjustment structure comprises a blade, and further comprises: an upper cover and a lower cover, the upper cover and the lower cover cooperate with each other to provide a supporting effect for the blade; the adjusting mechanism is arranged in the upper cover and the lower cover, the adjusting mechanism comprises a convex column, a groove body is formed in the convex column, the groove body comprises a middle groove section and an edge groove section, the direction of the middle groove section is different from that of the edge groove section, and a guide wheel is slidably installed in the groove body; and when the guide wheel ascends and descends in the groove body, the guide wheel drives the blades to be located at different angles by being located at different positions. The blades are provided with the adjusting mechanism so that the blades can be adjusted so as to meet the stirring requirements under different concentrations, meanwhile, the stirring rod is arranged for auxiliary stirring, and the stirring effect is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of agitators, and in particular relates to a blade adjustment structure and an agitator. Background Art

[0002] Mixing systems are widely used in various fields. They replace manual mixing of objects with mechanical means to maximize mixing efficiency. Mixing systems have different output powers depending on the volume being stirred and the working conditions.

[0003] A Chinese patent with authorization announcement number CN211586248U discloses a blade-adjustable submersible stirring device, in which a drive shaft is threadedly engaged with a bearing sleeve, the upper end of the first blade is hinged to a rotating block, and the upper part of the first blade is located at the lower part of the hinge shaft and is hingedly connected to the bearing sleeve. Therefore, the staff can adjust the depth of the drive shaft in the bearing sleeve by rotating the bearing sleeve, and then adjust the deployment angle of the blade assembly to meet the stirring work of sewage pools with different degrees of impurity accumulation; and the second blade is slidably adjusted to the first blade, which facilitates the adjustment of the length of the blade according to the width of the sewage pool, further improving the stirring effect of the sewage pool.

[0004] However, this technical solution still has at least the following drawbacks: the stirring device in this technical solution can only adjust the length of the blades, and increasing the length of the blades will increase the torque on the blades, thereby increasing the risk of breakage. In view of this, the present invention is proposed. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a blade adjustment structure and a stirrer, which provides an adjustment mechanism for the blades so that they can be adjusted to meet the stirring requirements under different concentrations. At the same time, a stirring rod is provided for auxiliary stirring to increase the stirring effect; the stirring rod is changed in speed by providing a speed change mechanism, and the resistance conditions encountered by the blades at different inclination angles are combined so that the output power of the power device can be reasonably distributed between the blades and the stirring rod.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A blade adjustment structure includes a blade and further includes:

[0008] An upper cover and a lower cover, wherein the upper cover and the lower cover cooperate with each other to provide support for the blades;

[0009] The adjusting mechanism is arranged inside the upper cover and the lower cover. The adjusting mechanism includes a boss, and a groove body is opened on the boss. The groove body includes a middle groove section and a side groove section. The directions of the middle groove section and the side groove section are different. A guide wheel is slidably installed in the groove body. When the guide wheel is raised and lowered in the groove body, it drives the blade to different angles by being in different positions.

[0010] As a preferred embodiment of the present invention, a lifting mechanism is provided inside the lower cover, and the lifting mechanism includes a support plate. The guide wheel is rotatably connected to the support plate. A pull rod is installed on the top of the support plate. The pull rod movably passes through the upper cover and extends to the outside. The lifting mechanism drives the support plate to rise and fall between the upper cover and the lower cover through the pull rod.

[0011] As a preferred embodiment of the present invention, a mounting tube is fixedly installed on the top of the pull rod, an outer sleeve is fixedly installed on the mounting tube, a bearing is fixedly installed on the top of the outer sleeve, and a cam is fixedly installed on the outer ring of the bearing, which drives the outer sleeve to rise and fall through the bearing to keep the outer sleeve rotating.

[0012] A stirrer includes a blade adjustment structure and a power device, wherein an output shaft is installed at the output end of the power device, the output shaft is fixedly connected to the upper cover, and the bearing and the outer sleeve are movably sleeved on the outside of the output shaft;

[0013] Also included is a mixing bowl for housing the mixer.

[0014] As a preferred embodiment of the present invention, a supporting mechanism is provided on the mixing barrel, an auxiliary stirring mechanism is provided at the bottom of the supporting mechanism, the auxiliary stirring mechanism includes a stirring rod, the bottom of the stirring rod is in a movably plug-in state with the bottom of the inner wall of the mixing barrel, and a first rotating shaft and a second rotating shaft are also provided on the supporting mechanism, and a bevel gear set is installed between the first rotating shaft, the second rotating shaft and the stirring rod.

[0015] As a preferred embodiment of the present invention, the support mechanism includes a mounting frame mounted on the top of the mixing barrel, a fixed tube is fixedly mounted on the mounting frame, the second rotating shaft is rotatably connected in the fixed tube, and a base plate is also fixedly mounted on the mounting frame, and a speed changing mechanism is provided on the base plate.

[0016] As a preferred embodiment of the present invention, the speed shifting mechanism includes a supporting assembly, the supporting assembly includes a fixed plate fixedly connected to the base plate, a fixed block is fixedly installed on the fixed plate, a slide rail is fixedly installed on the fixed block, a push rod group is slidably installed on the slide rail, and the speed shifting mechanism also includes a speed shifting assembly, and the push rod group drives the speed shifting assembly to change speed when sliding along the slide rail.

[0017] As a preferred embodiment of the present invention, the speed shift assembly includes a third rotating shaft and a fourth rotating shaft rotatably connected to the fixed block, the third rotating shaft and the second rotating shaft, and the fourth rotating shaft and the output shaft are all connected through a bevel gear set, and the power device drives the second rotating shaft to rotate through the speed shift assembly.

[0018] As a preferred embodiment of the present invention, the speed shift assembly also includes a first adapter and a second adapter respectively fixedly mounted on the third rotating shaft and the fourth rotating shaft, the first adapter and the second adapter are in opposite directions, a transmission wheel is meshed and connected between the first adapter and the second adapter, a fixed rod is movably inserted inside the transmission wheel, both ends of the fixed rod are fixedly connected to the fixed block, a connecting frame is movably sleeved on the fixed rod, a block rod is fixedly mounted on the connecting frame, and the block rod is movably connected to the push rod group.

[0019] As a preferred embodiment of the present invention, a pushing mechanism is provided on one side of the base plate, and the pushing mechanism includes a cylinder, a sleeve is fixedly installed on the output end of the cylinder, the sleeve is movably sleeved on the protruding rod, one end of the sleeve is rotatably connected to a pull plate, and one end of the pull plate is rotatably connected to the bottom of the push rod group.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention provides an adjustment mechanism for the blades to enable them to be adjusted to meet the stirring requirements under different concentrations, and at the same time provides a stirring rod for auxiliary stirring to enhance the stirring effect;

[0022] The present invention changes the speed of the stirring rod by arranging a speed change mechanism and combines the resistance conditions of the blades at different tilt angles so that the output power of the power device can be reasonably distributed between the blades and the stirring rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of a blade adjustment structure and an overall structure of a stirrer according to the present invention;

[0024] Figure 2 Schematic diagram of the overall structure of the agitator of the present invention;

[0025] Figure 3 This is a structural diagram of the mechanical sealing device of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the outer sleeve of the present invention;

[0027] Figure 5 This is a schematic diagram of the internal structure of the upper cover of the present invention;

[0028] Figure 6 This is a structural diagram of the pull rod of the present invention;

[0029] Figure 7 This is a structural diagram of the support plate of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the convex column of the present invention;

[0031] Figure 9 This is a structural diagram of the oil cylinder of the present invention;

[0032] Figure 10 This is a schematic diagram of the structure of the mixing barrel of the present invention;

[0033] Figure 11 This is a structural diagram of the fixing plate of the present invention;

[0034] Figure 12 This is a structural diagram of the push rod assembly of the present invention;

[0035] Figure 13 It is a structural schematic diagram of the transmission wheel of the present invention.

[0036] Description of reference numerals:

[0037] 100, sliding frame; 101, power unit; 102, packing seal; 103, mechanical seal; 104, output shaft; 105, upper cover; 106, lower cover; 107, boss; 108, blade seat; 109, blade;

[0038] 200, support plate; 201, positioning rod; 202, guide wheel; 203, middle slot section; 204, side slot section; 205, pull rod; 206, mounting tube; 207, outer sleeve; 208, bearing; 209, protruding rod;

[0039] 300, mixing barrel; 301, mounting frame; 302, bevel gear set; 303, first rotating shaft; 304, second rotating shaft; 305, fixed tube; 306, stirring rod;

[0040] 400, base plate; 401, fixed plate; 402, fixed block; 403, slide rail; 404, push rod assembly; 405, pull plate; 406, sleeve; 407, oil cylinder;

[0041] 500, third rotating shaft; 501, first adapter; 502, fixing rod; 503, transmission wheel; 504, second adapter; 505, fourth rotating shaft; 506, connecting frame; 507, blocking rod. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0043] Example 1

[0044] like Figures 1 to 8 As shown, a blade adjustment structure includes a blade 109 and further includes:

[0045] The upper cover 105 and the lower cover 106 cooperate with each other to provide support for the blades 109;

[0046] The adjustment mechanism is provided inside the upper cover 105 and the lower cover 106. The adjustment mechanism includes a boss 107, and a slot body is formed on the boss 107. The slot body includes a middle slot section 203 and a side slot section 204. The middle slot section 203 and the side slot section 204 have different directions. A guide wheel 202 is slidably installed in the slot body. When the guide wheel 202 is raised or lowered in the slot body, it drives the blade 109 to different angles by being in different positions.

[0047] When the guide wheel 202 is in the middle position of the middle slot section 203, the rotation center of the boss 107 is aligned with the center position of the guide wheel 202. At this time, the boss 107 can rotate freely to achieve the installation and disassembly of the blade 109. When the guide wheel 202 is at the two end positions of the middle slot section 203, the center position of the guide wheel 202 is not aligned with the rotation center of the boss 107. At this time, the guide wheel 202 presses against the middle slot section 203 to prevent it from rotating, thereby achieving the fixation of the blade 109. When the angle of the blade 109 needs to be adjusted, the guide wheel 202 is controlled to enter the side slot section 204. At this time, the guide wheel 202 presses against the side slot section 204 to drive the boss 107 to rotate.

[0048] A blade seat 108 is fixedly installed at one end of the blade 109, and the blade seat 108 is fixedly connected to the boss 107. The blade seat 108 is used to support the blade 109. The boss 107 is threadedly connected to the lower cover 106, and the threaded connection between the boss 107 and the lower cover 106 adopts a thread clearance fit to make relative rotation between the boss 107 and the lower cover 106 easy.

[0049] like Figures 5 to 7 As shown, in a specific embodiment, a lifting mechanism is provided inside the lower cover 106. The lifting mechanism includes a support plate 200, a guide wheel 202 rotatably connected to the support plate 200, and a pull rod 205 mounted on the top of the support plate 200. The pull rod 205 movably passes through the upper cover 105 and extends to the outside. The lifting mechanism drives the support plate 200 to rise and fall between the upper cover 105 and the lower cover 106 via the pull rod 205. In this configuration, a positioning rod 201 is fixedly mounted on the bottom of the inner wall of the lower cover 106. The support plate 200 is movably sleeved on the positioning rod 201. There are three positioning rods 201, which correspond to the blades 109. The support plate 200 slides up and down along the positioning rod 201 and cannot rotate.

[0050] like Figure 4 As shown, a mounting tube 206 is fixedly mounted on the top of the pull rod 205, and an outer sleeve 207 is fixedly mounted on the mounting tube 206. A bearing 208 is fixedly mounted on the top of the outer sleeve 207, and a protruding rod 209 is fixedly mounted on the outer ring of the bearing 208. The protruding rod 209 drives the outer sleeve 207 up and down through the bearing 208, thereby maintaining the rotation of the outer sleeve 207. In this configuration, sealing rings can be provided between the ends of the outer sleeve 207 and the output shaft 104 to protect the output shaft 104 from corrosion.

[0051] like Figures 1 to 3 As shown, a stirrer includes the above-mentioned blade adjustment structure and a power device 101. The output end of the power device 101 is equipped with an output shaft 104, the output shaft 104 is fixedly connected to the upper cover 105, and the bearing 208 and the outer sleeve 207 are movably connected to the outside of the output shaft 104;

[0052] The power unit 101 uses an energy-saving permanent magnet synchronous motor, which has an energy-saving effect. A packing seal device 102 and a mechanical seal device 103 are installed between the power unit 101 and the output shaft 104. A sliding frame 100 is slidably installed on the power unit 101, and the sliding frame 100 can be used to slide the power unit 101 for easy disassembly.

[0053] Also included is a mixing bucket 300 for accommodating the mixer.

[0054] like Figure 10 、 Figure 11 As shown, in a specific embodiment, a support mechanism is provided on the stirring barrel 300, and an auxiliary stirring mechanism is provided at the bottom of the support mechanism. The auxiliary stirring mechanism includes a stirring rod 306, and the bottom of the stirring rod 306 is movably connected to the bottom of the inner wall of the stirring barrel 300. The support mechanism is also provided with a first rotating shaft 303 and a second rotating shaft 304, and a bevel gear set 302 is installed between the first rotating shaft 303, the second rotating shaft 304 and the stirring rod 306. In this configuration, the stirring rod 306 is thin at the top and thick at the bottom, so that the solution at the bottom can be fully stirred and the material in the liquid can be prevented from sinking. The movable connection between the stirring rod 306 and the stirring barrel 300 allows the stirring rod 306 to be removed from the stirring barrel 300. The stirring rod 306 is in a four-pointed star shape, so that the stirring rod 306 will not be easily entangled by impurities, and it is easy to clean it.

[0055] like Figure 10As shown, the support mechanism further includes a mounting frame 301 mounted on the top of the mixing drum 300. A fixed tube 305 is fixedly mounted on the mounting frame 301. A second rotating shaft 304 is rotatably connected to the fixed tube 305. A base plate 400 is also fixedly mounted on the mounting frame 301, and a speed change mechanism is provided on the base plate 400. In this configuration, the mounting frame 301 is directly mounted on the mixing drum 300 so that it can be removed.

[0056] like Figures 11 to 13 As shown, the speed change mechanism further includes a support assembly, which includes a fixed plate 401 fixedly connected to a base plate 400, a fixed block 402 fixedly mounted on the fixed plate 401, a slide rail 403 fixedly mounted on the fixed block 402, and a push rod group 404 slidably mounted on the slide rail 403. The speed change mechanism also includes a speed change assembly, and the push rod group 404 drives the speed change assembly to change speed when it slides along the slide rail 403. In this configuration, the push rod group 404 is composed of multiple short rods, with plates mounted at both ends, forming gaps between the short rods, and the plates are slidably connected to the slide rail 403.

[0057] like Figures 12 to 13 As shown, further, the speed change assembly includes a third rotating shaft 500 and a fourth rotating shaft 505 rotatably connected to the fixed block 402, and the third rotating shaft 500 and the second rotating shaft 304, as well as the fourth rotating shaft 505 and the output shaft 104 are all connected through the bevel gear set 302. The power device 101 drives the second rotating shaft 304 to rotate through the speed change assembly. The speed change assembly also includes a first adapter 501 and a second adapter 504 respectively fixedly mounted on the third rotating shaft 500 and the fourth rotating shaft 505. The directions of the first adapter 501 and the second adapter 504 are opposite. A transmission wheel 503 is meshed and connected between the first adapter 501 and the second adapter 504. A fixed rod 502 is movably inserted inside the transmission wheel 503. Both ends of the fixed rod 502 are fixedly connected to the fixed block 402. A connecting frame 506 is movably sleeved on the fixed rod 502. A blocking rod 507 is fixedly mounted on the connecting frame 506. The blocking rod 507 is movably connected to the push rod group 404. In this setting, the first adapter 501 and the second adapter 504 are both truncated cone-shaped, and the inclination of the two is the same. By setting the first adapter 501 and the second adapter 504 in opposite directions so that the sides of the first adapter 501 and the second adapter 504 that are close to each other are parallel, the transmission wheel 503 can be matched with different positions of the first adapter 501 or the second adapter 504 to achieve a transmission effect.

[0058] like Figures 12 to 13As shown, a push mechanism is further provided on one side of the base plate 400. The push mechanism includes a cylinder 407. A sleeve 406 is fixedly mounted on the output end of the cylinder 407. The sleeve 406 is movably connected to the protruding rod 209. One end of the sleeve 406 is rotatably connected to the pull plate 405. One end of the pull plate 405 is rotatably connected to the bottom of the push rod assembly 404. In this arrangement, the sleeve 406 is movably connected to the protruding rod 209 to enable the protruding rod 209 to be separated from the sleeve 406.

[0059] The blade adjustment structure and the stirrer of this embodiment are implemented as follows: When in operation, the power device 101 drives the upper cover 105 and the lower cover 106 to rotate via the output shaft 104, so that the blades 109 rotate accordingly, thereby stirring the mixing barrel 300;

[0060] When the output shaft 104 rotates, it drives the fourth rotating shaft 505 to rotate via the bevel gear set 302. The fourth rotating shaft 505 drives the third rotating shaft 500 to rotate via the second adapter 504, the transmission wheel 503, and the first adapter 501. The third rotating shaft 500 drives the second rotating shaft 304 to rotate via the bevel gear set 302. The second rotating shaft 304 drives the stirring rod 306 to rotate via the bevel gear set 302, thereby providing auxiliary stirring at the edge of the mixing barrel 300.

[0061] When the angle of the blade 109 is adjusted according to the concentration, the oil cylinder 407 is started, and the oil cylinder 407 drives the sleeve 406 to move. When the sleeve 406 moves, it drives the convex rod 209 to move, and the convex rod 209 drives the bearing 208 to move. The bearing 208 drives the outer sleeve 207 to move, and the outer sleeve 207 drives the mounting tube 206 to move, so that the pull rod 205 drives the guide wheel 202 to move through the support plate 200. When the guide wheel 202 enters the side groove section 204 along the middle groove section 203, it drives the convex column 107 to rotate, and the convex column 107 drives the blade seat 108 to rotate to achieve adjustment of the angle of the blade 109. When the concentration is high, the guide wheel 202 moves upward to increase the inclination angle of the blade 109 and increase the stirring force of the blade 109 on the solution. When the concentration is low, the guide wheel 202 moves downward to reduce the inclination angle of the blade 109 and reduce the resistance.

[0062] When the oil cylinder 407 is working, the push rod group 404 is driven to move through the pull plate 405. The movement of the push rod group 404 also drives the blocking rod 507 to move, so that it drives the transmission wheel 503 to move through the connecting frame 506. The transmission wheel 503 realizes the speed change function by cooperating with different parts of the first adapter 501 and the second adapter 504, so that the rotation speed of the third shaft 500 changes. At this time, the speed of the stirring rod 306 changes accordingly. When the transmission wheel 503 cooperates with each other at different positions of the first adapter 501 and the second adapter 504, the fourth shaft 505 encounters different resistances during transmission. When the transmission wheel 503 approaches the thick end of the second adapter 504, the resistance encountered by the fourth shaft 505 increases, and the rotation speed of the stirring rod 306 increases. When the transmission wheel 503 approaches the thin end of the second adapter 504, the resistance encountered by the fourth shaft 505 decreases, and the speed of the stirring rod 306 decreases.

[0063] Based on this, when the concentration is high, the inclination angle of the blade 109 increases to increase the stirring force, and at the same time the transmission wheel 503 is close to the thin end of the second adapter 504 to reduce the resistance of the fourth shaft 505, so that more power of the power device 101 can be output to the blade 109. When the concentration is low, the inclination angle of the blade 109 is reduced to reduce its resistance, and at the same time the transmission wheel 503 is close to the thick end of the second adapter 504 so that more power of the power device 101 can be output to the stirring rod 306, thereby increasing the rotation speed of the stirring rod 306.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A blade adjustment structure, comprising a blade (109), characterized in that: Also includes: an upper cover (105) and a lower cover (106), wherein the upper cover (105) and the lower cover (106) cooperate with each other to provide support for the blades (109); An adjustment mechanism is provided inside the upper cover (105) and the lower cover (106), the adjustment mechanism comprising a boss (107), and a slot body is provided on the boss (107), the slot body comprising a middle slot section (203) and a side slot section (204), the middle slot section (203) and the side slot section (204) having different directions, a guide wheel (202) being slidably mounted in the slot body, and the guide wheel (202) drives the blade (109) to different angles by being in different positions when the guide wheel (202) is raised or lowered in the slot body.

2. A blade adjustment structure according to claim 1, characterized in that: A lifting mechanism is provided inside the lower cover (106), and the lifting mechanism includes a support plate (200). The guide wheel (202) is rotatably connected to the support plate (200). A pull rod (205) is installed on the top of the support plate (200). The pull rod (205) movably passes through the upper cover (105) and extends to the outside. The lifting mechanism drives the support plate (200) to be lifted and lowered between the upper cover (105) and the lower cover (106) through the pull rod (205).

3. A blade adjustment structure according to claim 2, characterized in that: A mounting tube (206) is fixedly mounted on the top of the pull rod (205), an outer sleeve (207) is fixedly mounted on the mounting tube (206), a bearing (208) is fixedly mounted on the top of the outer sleeve (207), and a convex rod (209) is fixedly mounted on the outer ring of the bearing (208), and the convex rod (209) drives the outer sleeve (207) to rise and fall through the bearing (208), so that the outer sleeve (207) can keep rotating.

4. A stirrer comprising a blade adjustment structure according to claim 3, characterized in that: It also includes a power device (101), wherein an output shaft (104) is installed at the output end of the power device (101), the output shaft (104) is fixedly connected to the upper cover (105), and the bearing (208) and the outer sleeve (207) are both movably sleeved on the outside of the output shaft (104); Also included is a mixing bucket (300) for accommodating the mixer.

5. A stirrer according to claim 4, characterized in that: The stirring barrel (300) is provided with a support mechanism, and an auxiliary stirring mechanism is provided at the bottom of the support mechanism. The auxiliary stirring mechanism includes a stirring rod (306), and the bottom of the stirring rod (306) is movably connected to the bottom of the inner wall of the stirring barrel (300). The support mechanism is also provided with a first rotating shaft (303) and a second rotating shaft (304), and a bevel gear set (302) is installed between the first rotating shaft (303), the second rotating shaft (304) and the stirring rod (306).

6. A stirrer according to claim 5, characterized in that: The support mechanism comprises a mounting frame (301) mounted on the top of the mixing barrel (300), a fixed tube (305) being fixedly mounted on the mounting frame (301), the second rotating shaft (304) being rotatably connected in the fixed tube (305), a base plate (400) being further fixedly mounted on the mounting frame (301), and a speed change mechanism being provided on the base plate (400).

7. A stirrer according to claim 6, characterized in that: The speed change mechanism includes a support assembly, the support assembly includes a fixed plate (401) fixedly connected to the base plate (400), a fixed block (402) fixedly mounted on the fixed plate (401), a slide rail (403) fixedly mounted on the fixed block (402), a push rod group (404) slidably mounted on the slide rail (403), and the speed change mechanism also includes a speed change assembly, and the push rod group (404) drives the speed change assembly to change speed when sliding along the slide rail (403).

8. A stirrer according to claim 7, characterized in that: The speed change assembly comprises a third rotating shaft (500) and a fourth rotating shaft (505) rotatably connected to the fixed block (402); the third rotating shaft (500) and the second rotating shaft (304), as well as the fourth rotating shaft (505) and the output shaft (104), are all connected via a bevel gear set (302); and the power device (101) drives the second rotating shaft (304) to rotate via the speed change assembly.

9. The stirrer according to claim 8, characterized in that: The speed change assembly further includes a first adapter (501) and a second adapter (504) fixedly mounted on the third rotating shaft (500) and the fourth rotating shaft (505), respectively. The first adapter (501) and the second adapter (504) are in opposite directions. A transmission wheel (503) is meshedly connected between the first adapter (501) and the second adapter (504). A fixed rod (502) is movably inserted into the transmission wheel (503). Both ends of the fixed rod (502) are fixedly connected to the fixed block (402). A connecting frame (506) is movably sleeved on the fixed rod (502). A blocking rod (507) is fixedly mounted on the connecting frame (506). The blocking rod (507) is movably connected to the push rod group (404).

10. The stirrer according to claim 9, characterized in that: A pushing mechanism is provided on one side of the base plate (400), and the pushing mechanism includes an oil cylinder (407). A sleeve (406) is fixedly mounted on the output end of the oil cylinder (407), and the sleeve (406) is movably sleeved on the protruding rod (209). One end of the sleeve (406) is rotatably connected to a pull plate (405), and one end of the pull plate (405) is rotatably connected to the bottom of the push rod group (404).

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