A fixed-point stopping mechanism for a mixer

Abstract

The present application relates to the technical field of mixing equipment, and in particular to a fixed-point stop mechanism for a mixer, including a material cylinder, a sealing cover, a planetary box, a driving assembly, a main shaft, a first stirring paddle and a second stirring paddle; the main shaft is rotatably mounted on the sealing cover, and the bottom end of the main shaft is connected to the planetary box; two stirring members are rotatably mounted on the planetary box, and the two stirring members are connected to the main shaft through a transmission assembly; the planetary box and the first stirring paddle are respectively provided with a first magnetic member and a second magnetic member, and the sealing cover or the material cylinder is provided with a magnetic detection switch corresponding to the two magnetic members, and the two magnetic detection switches are connected to the controller signal of the driving assembly; the driving assembly is connected to the main shaft, and is used to drive the main shaft to rotate and drive the planetary box to revolve, and drive the first stirring paddle and the second stirring paddle to rotate. The present application effectively solves the technical problem in the prior art of how to realize the automatic fixed point of the stirring paddle at a specified position without affecting the mixing effect of the slurry.

Description

Technical Field

[0001] The present application relates to the technical field of mixing equipment, and in particular to a fixed-point stopping mechanism for a mixer. Background Art

[0002] The sealing cover of the mixing equipment is equipped with one or more nozzles for feeding liquid or powder materials. In actual production, it is often encountered that when the mixing paddle just turns to or stops at the discharge nozzle position, some materials will accumulate on the shoulder of the mixing paddle, affecting the material ratio and mixing effect. If you want to stagger the mixing paddle to stop at other positions, there are two common methods:

[0003] 1. Directly stop the machine, and after the stirring paddle stops randomly at a certain position, manually rotate the planetary box and the stirring paddle to the required position. This method cannot be automated, and the material tank needs to be lowered before rotating the planetary box, which is easy to contaminate the slurry and cause work-related injuries.

[0004] 2. Use one detection point to detect the passive sprocket. This method can be automated and does not require a lowering cylinder. However, if you want to control the stirring paddle to stop at a specified position, the gear ratio between the sun gear and the planetary gear must be divisible, so as to ensure that it can stop at a specified point after multiple starts. However, if the gear ratio between the sun gear and the planetary gear can be divided, it means that the stirring paddle's trajectory is repeated during the stirring process. As for how many turns it takes to start repeating the trajectory, it depends on the gear ratio, which will create a dead angle in the stirring area and affect the slurry mixing effect. Summary of the invention

[0005] In view of this, the purpose of the present application is to provide a fixed-point stopping mechanism for a mixer, which effectively solves the technical problem in the prior art of how to automatically fix the stirring paddle at a specified position without affecting the mixing effect of the slurry.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A fixed-point stopping mechanism for a mixer comprises a material cylinder, a sealing cover, a planetary box, a driving assembly, a main shaft, a first stirring paddle and a second stirring paddle;

[0008] The sealing cover is arranged on the opening of the material cylinder, the planetary box is movably arranged in the sealing cover, the main shaft is rotatably mounted on the sealing cover, and the bottom end of the main shaft extends into the sealing cover and is fixedly connected to the planetary box;

[0009] The first stirring paddle and the second stirring paddle are both movably arranged in the material cylinder, and the top end of the first stirring paddle and the top end of the second stirring member are rotatably mounted on the planetary box through a first planetary shaft and a second planetary shaft respectively, and the first planetary shaft and the second planetary shaft are connected to the main shaft through a transmission assembly;

[0010] The planetary box and the first stirring paddle are respectively provided with a first magnetic member and a second magnetic member, the sealing cover or the material cylinder is provided with a first magnetic detection switch corresponding to the first magnetic member and a second magnetic detection switch corresponding to the second magnetic member, and the first magnetic detection switch and the second magnetic detection switch are connected to the controller signal of the driving component;

[0011] The driving assembly is connected to the main shaft, and is used for driving the main shaft to rotate, drive the planetary box to revolve, and drive the first stirring paddle and the second stirring paddle to rotate.

[0012] Preferably, in the above-mentioned fixed-point stopping mechanism for a mixer, when the first magnetic detection switch detects the first magnetic element and the second magnetic detection switch detects the second magnetic element, the controller controls the driving component to stop working.

[0013] Preferably, in the above-mentioned fixed-point stopping mechanism for a mixer, the controller is provided with an inertial deviation correction module.

[0014] Preferably, in the above-mentioned fixed-point stopping mechanism for a mixer, a feed discharge port is provided on the sealing cover, and the feed discharge port is located on a side of the second stirring paddle away from the first stirring paddle.

[0015] Preferably, in the above-mentioned fixed-point stopping mechanism for a mixer, the first stirring paddle and the second stirring paddle are staggered in a horizontal direction.

[0016] Preferably, in the above-mentioned fixed-point stopping mechanism for a mixer, the first stirring paddle and the second stirring paddle form an angle of 90 degrees with each other.

[0017] Preferably, in the above-mentioned fixed-point stopping mechanism for a mixer, the transmission assembly includes a sun gear and two planetary gears;

[0018] The sun gear is sleeved and fixed on the main shaft, and the two planetary gears are sleeved and fixed on the first planetary shaft and the second planetary shaft respectively;

[0019] The two planetary gears are meshingly connected with the sun gear.

[0020] Preferably, in the above-mentioned fixed-point stopping mechanism for a mixer, a gear seat is provided in the sealing cover, and matching limiting protrusions and annular grooves are provided on the gear seat and the sun gear respectively.

[0021] Preferably, in the above-mentioned fixed-point stopping mechanism for a mixer, the driving assembly comprises a motor, a driving sprocket and a driven sprocket;

[0022] The driving sprocket is connected to the driving shaft of the motor, the passive sprocket is sleeved on the main shaft, and the driving sprocket is connected to the passive sprocket through a chain transmission.

[0023] Preferably, in the above-mentioned fixed-point stopping mechanism for a mixer, a bearing seat is provided on the top of the sealing cover, and the top end of the main shaft is rotatably mounted in the bearing seat.

[0024] Compared with the prior art, the beneficial effects of this application are:

[0025] The present application provides a fixed-point stop mechanism for a mixer. When it is necessary to add slurry into a material cylinder, a first magnetic detection switch and a second magnetic detection switch can be started to detect the first magnetic part and the second magnetic part respectively. When the first magnetic detection switch and the second magnetic part detection switch detect the corresponding magnetic parts at the same time, a signal can be sent to the controller of the drive component, so that the controller can control the drive component to stop working in time, so that the first stirring paddle and the second stirring paddle can stop at a position staggered from the discharge port, thereby facilitating the staff to add new slurry into the material cylinder through the discharge port, avoiding the accumulation of slurry on the shoulder of the stirring paddle to affect the material ratio and mixing effect, and realizing manual full-automatic control. There is no need to lower the material cylinder to prevent slurry contamination or accidental work injuries, and there is no need for the gear ratio between the sun gear and the planetary gear to be divisible. Sun gears and planetary gears with any gear ratio can be used, which is conducive to reducing dead angles in the mixing area and ensuring that the slurry has a good mixing effect. The technical problem of how to realize automatic fixed-point positioning of the stirring paddle at a specified position without affecting the mixing effect of the slurry in the prior art is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1 A structural schematic diagram of a fixed-point stopping mechanism for a mixer provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the connection between a gear seat and a sun gear of a fixed-point stopping mechanism for a mixer provided in an embodiment of the present application.

[0029] In the figure:

[0030] 1 is a material cylinder, 2 is a sealing cover, 21 is a material discharge port, 3 is a planetary box, 4 is a main shaft, 41 is a sun gear, 411 is an annular groove, 42 is a gear seat, 421 is a limiting protrusion, 51 is a first stirring paddle, 511 is a first planetary shaft, 52 is a second stirring paddle, 521 is a second planetary shaft, 53 is a planetary gear, 61 is a first magnetic part, 62 is a second magnetic part, 63 is a first magnetic detection switch, 64 is a second magnetic detection switch, 71 is a driving sprocket, 72 is a driven sprocket, 8 is a bearing seat, 91 is a first bearing, and 92 is a second bearing. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a replaceable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0034] One or more nozzles are set on the sealing cover of the mixing equipment for feeding liquid or powder materials. In actual production, it is often encountered that when the mixing paddle just turns to or stops at the discharge nozzle position, a part of the material will accumulate on the shoulder of the mixing paddle, affecting the material ratio and mixing effect. If the mixing paddle is to be staggered and stopped at other positions, there are two common methods: 1. Direct shutdown, the mixing paddle stops randomly at a certain position, and the planetary box and the mixing paddle are manually rotated to the required position. This method cannot be automated, and it is necessary to lower the material cylinder before rotating the planetary box, which is easy to contaminate the slurry and is also prone to work injuries. 2. Use a detection point to detect the passive sprocket. This method can be automated and does not require a lowering cylinder, but if you want to control the mixing paddle to stop at a specified position, the gear ratio between the sun gear and the planetary gear must be divisible, so as to ensure that it can be stopped at a fixed point after multiple starts. However, the gear ratio between the sun gear and the planetary gear can be divided, which means that the track of the stirring paddle is repeated during the stirring process. The number of revolutions after which the track starts to repeat depends on the gear ratio, which will produce a dead angle in the stirring area and affect the mixing effect of the slurry. This embodiment provides a fixed-point stop mechanism for a stirrer, which effectively solves the technical problem in the prior art of how to realize the automatic fixed point of the stirring paddle at a specified position without affecting the mixing effect of the slurry.

[0035] See also Figure 1-Figure 2 The embodiment of the present application provides a fixed-point stop mechanism for a mixer, comprising a material cylinder 1, a sealing cover 2, a planetary box 3, a driving assembly, a main shaft 4, a first stirring paddle 51 and a second stirring paddle 52; the sealing cover 2 is covered on the opening of the material cylinder 1, the planetary box 3 is movably arranged in the sealing cover 2, the main shaft 4 is rotatably mounted on the sealing cover 2, and the bottom end of the main shaft 4 extends into the sealing cover 2 and is fixedly connected to the planetary box 3; the first stirring paddle 51 and the second stirring paddle 52 are both movably arranged in the material cylinder 1, and the top end of the first stirring paddle 51 and the top end of the second stirring member are rotatably mounted on the planetary box 3 through the first planetary shaft 511 and the second planetary shaft 521 respectively The first planetary shaft 511 and the second planetary shaft 521 are connected to the main shaft 4 through a transmission assembly; the planetary box 3 and the first stirring paddle 51 are respectively provided with a first magnetic piece 61 and a second magnetic piece 62, and the sealing cover 2 or the material cylinder 1 is provided with a first magnetic detection switch 63 corresponding to the first magnetic piece 61 and a second magnetic detection switch 64 corresponding to the second magnetic piece 62, and the first magnetic detection switch 63 and the second magnetic detection switch 64 are connected with the controller signal of the driving assembly; the driving assembly is connected to the main shaft 4, and is used to drive the main shaft 4 to rotate and drive the planetary box 3 to revolve, and drive the first stirring paddle 51 and the second stirring paddle 52 to rotate.

[0036] More specifically, the first magnetic detection switch 63 and the second magnetic detection switch 64 can be set on the bottom of the inner wall of the sealing cover 2, or on the top of the inner wall of the cylinder 1, as long as the first magnetic detection switch 63 can detect and identify the first magnetic part 61, and the second magnetic detection switch 64 can detect and identify the second magnetic part 62; in addition, the first magnetic part and the second magnetic part maintain a certain distance, so that the first magnetic detection switch cannot identify the second magnetic part, and the second magnetic detection switch cannot identify the first magnetic part; the first planetary shaft 511 and the second planetary shaft 521 pass through the bottom and top of the planetary box 3, and the first planetary shaft 511 and the second planetary shaft 521 are both rotatably connected to the planetary box 3 through the second bearing 92; the opening of the cylinder 1 faces upward, and the bottom edge of the sealing cover 2 is detachably connected to the top edge of the cylinder 1 through a sealing device; this embodiment can be used in lithium battery slurry stirring and mixing equipment or silicone polymer stirring and mixing operations, and can also be used in other stirring operations that require adding slurry through the discharge port 21, and this embodiment will not be repeated one by one.

[0037] When the present embodiment is in use, the main shaft 4 is driven to rotate by the driving assembly, and the rotation of the main shaft 4 can drive the planetary box 3 to revolve, and the first stirring paddle 51 and the second stirring paddle 52 also revolve around the main shaft 4 following the planetary box 3. At the same time, the main shaft 4 also drives the first stirring paddle 51 and the second stirring paddle 52 to rotate by themselves through the transmission assembly, that is, the rotation of the main shaft 4 causes the first stirring paddle 51 and the second stirring paddle 52 to revolve around the main shaft 4 at the same time (that is, Figure 1 A direction rotation) and rotation around its own axis (that is, Figure 1 The first stirring paddle 51 and the second stirring paddle 52 rotate in the direction of rotation, and the slurry in the material cylinder 1 is stirred to the maximum extent, thereby achieving a good stirring effect.

[0038] When it is necessary to add slurry into the material cylinder 1, the first magnetic detection switch 63 and the second magnetic detection switch 64 can be started to detect the first magnetic part 61 and the second magnetic part 62 respectively. When the first magnetic detection switch 63 and the second magnetic part 62 detection switch detect the corresponding magnetic parts at the same time, a signal can be sent to the controller of the drive component so that the controller can control the drive component to stop working in time, so that the first stirring paddle 51 and the second stirring paddle 52 can stop at a position staggered from the discharge port 21, thereby facilitating the staff to add new slurry into the material cylinder 1 through the discharge port 21, avoiding The slurry accumulates on the shoulder of the stirring paddle, which affects the material ratio and mixing effect. Fully automatic control can be achieved without manual intervention. There is no need to lower the material cylinder 1 to prevent slurry contamination or accidental work injuries. There is no need for the gear ratio between the sun gear 41 and the planetary gear 53 to be divisible. The sun gear 41 and the planetary gear 53 with any gear ratio can be used, which is beneficial to reducing dead angles in the stirring area and ensuring that the slurry has a good mixing effect. It effectively solves the technical problem in the prior art of how to realize the automatic fixing of the stirring paddle at a specified position without affecting the mixing effect of the slurry.

[0039] Furthermore, in this embodiment, when the first magnetic detection switch 63 detects the first magnetic part 61 and the second magnetic detection switch 64 detects the second magnetic part 62, the controller controls the driving component to stop working. The first magnetic detection switch 63 detects the first magnetic part 61, indicating that the first magnetic part 61 moves to a position close to the first magnetic detection switch 63; the second magnetic detection switch 64 detects the second magnetic part 62, indicating that the second magnetic part 62 moves to a position close to the second magnetic detection switch 64. When the first magnetic part 61 and the second magnetic part 62 move to the corresponding positions at the same time, the planetary box 3 and the first stirring are moved to the desired positions so that the staff can add materials through the discharge port 21.

[0040] More specifically, in the initial position, the first stirring paddle 51 and the second stirring paddle 52 are both offset from the vertical position of the discharge port 21, and at this time, the first magnetic element 61 and the second magnetic element 62 are both located on the side of the first stirring paddle 51 away from the second stirring paddle 52, and the first magnetic detection switch 63 can detect the first magnetic element 61, and the second magnetic detection switch 64 can detect the second magnetic element 62; when the stirring operation requires adding materials, the first magnetic detection switch 63 and the second magnetic detection switch 64 can be started, and whether the first magnetic detection switch 63 and the second magnetic detection switch 64 detect the corresponding magnetic elements at the same time can be used to determine whether the first stirring paddle 51 and the second stirring paddle 52 have moved to a position offset from the discharge port 21.

[0041] Furthermore, in this embodiment, the controller is provided with an inertial correction module. When the machine needs to be stopped after operation, the first magnetic member 61 and the second magnetic member 62 are simultaneously detected by the corresponding magnetic switches and then stopped, but they will still rotate forward due to inertia when stopped. The controller is connected to the touch screen of the equipment cabinet, and the setting of the inertial correction module enables the touch screen to have a correction function, so that the staff can fine-tune the stop position of the first stirring paddle 51 through delay.

[0042] Furthermore, in this embodiment, the sealing cover 2 is provided with a feed opening 21, which is located on the side of the second stirring paddle 52 away from the first stirring paddle 51. This arrangement can avoid the first magnetic part 61 and the second magnetic part 62, and can also better add slurry to the bottom of the material tank 1.

[0043] More specifically, the discharge port 21 is provided with a detachable sealing cover, which can prevent part of the slurry from flying out of the material tank 1.

[0044] Furthermore, in this embodiment, the first stirring paddle 51 and the second stirring paddle 52 are staggered in the horizontal direction, that is, the first stirring paddle 51 and the second stirring paddle 52 are respectively arranged in front and back. The two stirring paddles placed in front and back can be more evenly distributed in the material cylinder 1 in the vertical direction, which is conducive to making the mixing effect of the material cylinder 1 at various locations in the vertical direction roughly the same, and then through the mutual stirring effect of the two stirring paddles, the material in the material cylinder 1 is made more disordered, which is conducive to improving the mixing effect of the material.

[0045] More specifically, the first stirring paddle 51 and the second stirring paddle 52 can both be twisted paddles. The top of the first stirring paddle 51 is larger, which is convenient for installing the second magnetic component 62; the top of the second stirring paddle 52 is smaller, which is convenient for adding materials through the discharge port 21.

[0046] Furthermore, in this embodiment, the first stirring paddle 51 and the second stirring paddle 52 are at an angle of 90 degrees to each other. The first stirring paddle 51 and the second stirring paddle 52 are arranged at an angle of 90 degrees to each other, so that the first stirring paddle 51 and the second stirring paddle 52 can be distributed in the material tank 1 to the maximum extent, which is beneficial to reduce the dead angle of the stirring area.

[0047] Further, in this embodiment, the transmission assembly includes a sun gear 41 and two planetary gears 53; the sun gear 41 is sleeved on the main shaft 4, and the two planetary gears 53 are sleeved on the first planetary shaft 511 and the second planetary shaft 521 respectively; the two planetary gears 53 are meshed and connected with the sun gear 41. The sun gear 41 can rotate with the rotation of the main shaft 4, and the rotation of the sun gear 41 can drive the two planetary gears 53 to rotate, and then drive the first planetary shaft 511 and the second planetary shaft 521, thereby driving the first stirring paddle 51 and the second stirring paddle 52 to rotate, so that the first stirring paddle 51 and the second stirring paddle 52 rotate around their own axes.

[0048] More specifically, the gears of the two planetary gears 53 are the same, so that during operation, the first stirring paddle 51 and the second stirring paddle 52 can rotate synchronously in the same direction at a fixed angular velocity; in this embodiment, the tooth ratio of the sun gear 41 to the planetary gear 53 can be an integer or an infinite non-repeating decimal, and the required tooth ratio of the sun gear 41 to the planetary gear 53 can be selected according to actual needs.

[0049] Further, in this embodiment, please refer to Figure 2 A gear seat 42 is provided in the sealing cover 2, and matching limiting protrusions 421 and annular grooves 411 are provided on the gear seat 42 and the sun gear 41, respectively. The limiting protrusion 421 can rotate in the annular groove 411. By setting the limiting protrusion 421 and the annular groove 411, the movement of the sun gear 41 can be effectively limited without affecting the rotation of the sun gear 41, which is conducive to ensuring the stability of the movement of the sun gear 41, thereby ensuring the stability of the transmission between the sun gear 41 and the planetary gear 53.

[0050] More specifically, the gear seat 42 is located above the sun gear 41, and a limiting protrusion 421 may be provided at the bottom of the gear seat 42, and a corresponding annular groove 411 may be provided on the top of the sun gear 41; an annular groove 411 may be provided at the bottom of the gear seat 42, and a corresponding limiting protrusion 421 may be provided on the top of the sun gear 41.

[0051] Furthermore, in this embodiment, the driving assembly includes a motor, a driving sprocket 71 and a passive sprocket 72; the driving sprocket 71 is connected to the driving shaft of the motor, the passive sprocket 72 is sleeved on the main shaft 4, and the driving sprocket 71 and the passive sprocket 72 are connected through a chain transmission. The motor can drive the driving sprocket 71 to rotate, and the rotation of the driving sprocket 71 drives the rotation of the passive sprocket 72, thereby driving the main shaft 4 to rotate, thereby driving the first stirring paddle 51 and the second stirring paddle 52 to simultaneously perform a revolution motion around the main shaft 4 and a rotation motion around their own axis.

[0052] More specifically, the motor is equipped with a reducer so that the motor can drive the first stirring paddle 51 and the second stirring paddle 52 with reasonable rotation; the motor can be connected to the main shaft 4 not only through a chain drive, but also through a belt drive, and can also be directly connected to the main shaft 4 for driving.

[0053] Furthermore, in this embodiment, a bearing seat 8 is provided at the top of the sealing cover 2, and the top end of the main shaft 4 is rotatably installed in the bearing seat 8. The main shaft 4 is rotatably connected to the bearing seat 8 through the first bearing 91. The arrangement of the bearing seat 8 can not only ensure the stability of the rotation of the main shaft 4, but also cover the main shaft 4 to prevent the surface of the main shaft 4 from being overly dusty and affecting the normal operation of the main shaft 4, and can also prevent the staff from directly touching the rotating main shaft 4, thereby reducing the occurrence of safety accidents.

[0054] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0055] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fixed-point stopping mechanism for a mixer, characterized in that: It includes a material cylinder, a sealing cover, a planetary box, a driving assembly, a main shaft, a first stirring paddle and a second stirring paddle; The sealing cover is arranged on the opening of the material cylinder, the planetary box is movably arranged in the sealing cover, the main shaft is rotatably mounted on the sealing cover, and the bottom end of the main shaft extends into the sealing cover and is fixedly connected to the planetary box; The first stirring paddle and the second stirring paddle are both movably arranged in the material cylinder, and the top end of the first stirring paddle and the top end of the second stirring paddle are rotatably mounted on the planetary box through a first planetary shaft and a second planetary shaft respectively, and the first planetary shaft and the second planetary shaft are connected to the main shaft through a transmission assembly; The planetary box and the first stirring paddle are respectively provided with a first magnetic member and a second magnetic member, the sealing cover or the material cylinder is provided with a first magnetic detection switch corresponding to the first magnetic member and a second magnetic detection switch corresponding to the second magnetic member, and the first magnetic detection switch and the second magnetic detection switch are connected to the controller signal of the driving component; The driving assembly is connected to the main shaft, and is used to drive the main shaft to rotate, drive the planetary box to revolve, and drive the first stirring paddle and the second stirring paddle to rotate; When the first magnetic detection switch detects the first magnetic element and the second magnetic detection switch detects the second magnetic element, the controller controls the driving component to stop working; The sealing cover is provided with a feed discharge port, and the feed discharge port is located at a side of the second stirring paddle away from the first stirring paddle.

2. The fixed-point stopping mechanism for a mixer according to claim 1, characterized in that: The controller is provided with an inertial deviation correction module.

3. The fixed-point stopping mechanism for a mixer according to claim 1, characterized in that: The first stirring paddles and the second stirring paddles are arranged alternately in a horizontal direction.

4. The fixed-point stopping mechanism for a mixer according to claim 2, characterized in that: The first stirring paddle and the second stirring paddle form an angle of 90 degrees with each other.

5. The fixed-point stopping mechanism for a mixer according to claim 1, characterized in that: The transmission assembly includes a sun gear and two planetary gears; The sun gear is sleeved and fixed on the main shaft, and the two planetary gears are sleeved and fixed on the first planetary shaft and the second planetary shaft respectively; The two planetary gears are meshingly connected with the sun gear.

6. The fixed-point stopping mechanism for a mixer according to claim 5, characterized in that: A gear seat is arranged in the sealing cover, and matching limiting protrusions and annular grooves are arranged on the gear seat and the sun gear respectively.

7. The fixed-point stopping mechanism for a mixer according to claim 1, characterized in that: The driving assembly includes a motor, a driving sprocket and a driven sprocket; The driving sprocket is connected to the driving shaft of the motor, the passive sprocket is sleeved on the main shaft, and the driving sprocket is connected to the passive sprocket through a chain transmission.

8. The fixed-point stopping mechanism for a mixer according to any one of claims 1 to 7, characterized in that: A bearing seat is arranged on the top of the sealing cover, and the top end of the main shaft is rotatably mounted in the bearing seat.

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