Adjustable grading wheel

Abstract

The utility model discloses an adjustable grading wheel, which relates to the grading wheel technical field, the adjustable grading wheel comprises an upper end cover, a lower end cover, a rotating shaft, blades, an external gear and an internal gear, the external gear is provided with a locking assembly, the upper end cover and the lower end cover are arranged in parallel at intervals, the rotating shaft passes through the upper end cover and the lower end cover in sequence, and the blades are arranged on the rotating shaft. The rotating shaft is arranged on the upper end cover and rotationally connected with the upper end cover and the lower end cover, the blades are located between the upper end cover and the lower end cover, extend in the axial direction of the rotating shaft and are fixedly connected with the rotating shaft, the outer gear and the inner gear are located on the side, back to the lower end cover, of the upper end cover, the outer gear is arranged on the outer wall of the rotating shaft, and the inner gear is arranged on the outer gear in a sleeving mode and meshed with the outer gear. The inner gear can rotate relative to the upper end cover in the direction from the upper end cover to the lower end cover, the outer gear and the rotating shaft are driven to rotate around the axis of the rotating shaft, then the blades are driven to rotate, the angles of the blades can be adjusted to meet different production requirements, the inner gear and the upper end cover are locked through the locking assembly, and the adaptability of the grading wheel is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of grading wheel, especially adjustable grading wheel. BACKGROUND

[0002] In the crushing device such as airflow pulverizer, grading wheel plays a vital role. Its main function is to accurately classify the crushed materials to ensure that the particle size distribution of the obtained products meets the process requirements. Grading wheel separates the particle size of graphite and other materials by using its unique structure and strong centrifugal force generated by rotation. After classification, fine particles meeting the particle size standard can smoothly enter the subsequent processing link, while unqualified coarse particles are sent back to the crushing area for re-crushing.

[0003] Currently, the blades of the grading wheel are mostly fixed by welding, which limits the adjustment of the blade angle, resulting in relatively weak adaptability. In order to adapt to the changing production needs, the current particle size control is mainly achieved by adjusting the speed of the grading wheel or replacing grading wheels of different specifications. However, adjusting the speed may affect the classification efficiency and reduce the operation effect; and overall replacement of the grading wheel has the problems of long replacement time, low production efficiency and high replacement cost. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of adjustable grading wheel, to improve the applicability of grading wheel.

[0005] To achieve the above purpose, the adjustable grading wheel provided by the utility model comprises an upper end cover, a lower end cover, a rotating shaft, a blade, an external gear and an internal gear, the external gear is provided with a locking assembly, the upper end cover and the lower end cover are arranged in parallel and spaced apart, the rotating shaft passes through the upper end cover and the lower end cover in sequence and is rotatably connected with the upper end cover and the lower end cover respectively, the blade is located between the upper end cover and the lower end cover, the blade is arranged in extension along the axial direction of the rotating shaft and is fixedly connected with the rotating shaft, the external gear and the internal gear are located on the side of the upper end cover away from the lower end cover, the external gear is arranged on the outer wall of the rotating shaft, the internal gear is sleeved on the external gear and is in mesh with the external gear, the internal gear can rotate relative to the upper end cover in the direction from the upper end cover to the lower end cover to drive the blade to rotate around the rotating shaft, and the locking assembly is used to lock the internal gear and the upper end cover.

[0006] In an embodiment, the locking assembly comprises a rotation-stopping pin and a cylinder, the cylinder is fixedly connected with the internal gear, the cylinder is arranged in extension in the direction from the upper end cover to the lower end cover, the rotation-stopping pin is in sliding connection with the inner wall of the cylinder, the upper end cover is provided with a insertion hole, and the rotation-stopping pin slides along the inner wall of the cylinder to insert into or separate from the insertion hole.

[0007] In an embodiment, the upper end cover is provided with a plurality of the insertion holes, and the plurality of the insertion holes are arranged in a ring shape at equal intervals.

[0008] In an embodiment, the locking assembly comprises a plurality of the rotation-stopping pins and a plurality of the barrels, each of the rotation-stopping pins is in sliding connection with the inner wall of one of the barrels, and each of the rotation-stopping pins can be inserted into one of the insertion holes.

[0009] In an embodiment, the adjustable grading wheel further comprises a stop plate, the stop plate is arranged on the side of the inner gear away from the upper end cover, one end of the rotating shaft away from the lower end cover is connected with the stop plate, and the inner gear is limited between the stop plate and the upper end cover.

[0010] In an embodiment, the side of the upper end cover facing the stop plate is provided with a reinforcing rib, and the reinforcing rib is in abutment with the stop plate.

[0011] In an embodiment, the reinforcing rib is arranged in extension along the center of the upper end cover to the edge of the upper end cover.

[0012] In an embodiment, the rotating shaft sequentially passes through the stop plate, the upper end cover and the lower end cover, the rotating shaft has a first end and a second end, the first end is located on the side of the stop plate away from the upper end cover, the second end is located on the side of the lower end cover away from the upper end cover, the first end is screwed with a first nut, the second end is screwed with a second nut, the side wall of the stop plate facing the first nut is in abutment with the stop plate, and the side wall of the lower end cover facing the second nut is in abutment with the lower end cover.

[0013] In an embodiment, the adjustable grading wheel further comprises a locking shaft, one end of the locking shaft is formed with a boss, the other end of the locking shaft is screwed with a third nut, the locking shaft sequentially passes through the lower end cover and the upper end cover, the boss is arranged on the side of the lower end cover away from the upper end cover and is in abutment with the lower end cover, and the third nut is arranged on the side of the upper end cover away from the lower end cover and is in abutment with the upper end cover.

[0014] In an embodiment, the adjustable grading wheel comprises a plurality of rotating shafts and a plurality of blades, the plurality of rotating shafts are arranged in a ring shape at equal intervals, and each of the blades is fixedly connected with one of the rotating shafts.

[0015] The adjustable grading wheel proposed in this utility model includes an upper end cover, a lower end cover, a rotating shaft, blades, an external gear, and an internal gear. The external gear is equipped with a locking component. The upper and lower end covers are arranged parallel to each other and spaced apart. The rotating shaft passes through the upper and lower end covers sequentially and is rotatably connected to them respectively. The blades are located between the upper and lower end covers, extending axially along the rotating shaft and fixedly connected to it. Both the external and internal gears are located on the side of the upper end cover facing away from the lower end cover. The external gear is fixed to the outer wall of the rotating shaft, and the internal gear is fitted onto and meshes with the external gear. The internal gear can rotate relative to the upper end cover in the direction from the upper to the lower end cover. Thus, the internal gear drives the external gear and the rotating shaft to rotate around the axis of the rotating shaft, thereby driving the blades to rotate, allowing the blade angle to be adjusted. After adjustment, the locking component locks the internal gear to the upper end cover. The blades of the adjustable grading wheel proposed in this utility model can be adjusted to adapt to different production needs, improving the applicability of the grading wheel, thereby increasing production efficiency and saving the cost of replacing different grading wheels. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of an embodiment of the adjustable grading wheel provided by this utility model;

[0018] Figure 2 for Figure 1 A partial structural diagram of the adjustable grader wheel;

[0019] Figure 3 for Figure 1 A schematic diagram of the locking shaft of the adjustable grader wheel;

[0020] Figure 4 for Figure 1 A sectional view along line A-A'.

[0021] Figure 5 for Figure 4 Schematic diagram of the structure of the external gear and the internal gear;

[0022] Figure 6 for Figure 4 A schematic diagram of a local structure in the image;

[0023] Figure 7 for Figure 6 A sectional view along line B-B'.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 100, adjustable grading wheel; 1, upper end cover; 11, reinforcing rib; 1a, insertion hole; 2, lower end cover; 3, rotating shaft; 31, first end; 32, second end; 4, blade; 51, outer gear; 52, inner gear; 6, locking assembly; 61, rotation-stopping pin; 62, cylinder; 7, stop plate; 81, first nut; 82, second nut; 83, third nut; 9, locking shaft; 91, boss.

[0026] The realization, functional features and advantages of the utility model will be further explained in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0028] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0029] In addition, if the embodiments of the utility model involve the description of "first", "second", etc., the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0030] The utility model provides a kind of adjustable grading wheel.

[0031] Please refer to Figure 1 、 Figure 2 And Figure 5In the embodiment of the utility model, the adjustable grading wheel comprises an upper end cover, a lower end cover, a rotating shaft, a blade, an external gear and an internal gear, the external gear is provided with a locking assembly, the upper end cover and the lower end cover are arranged in parallel and at intervals, the rotating shaft passes through the upper end cover and the lower end cover in sequence and is rotatably connected with the upper end cover and the lower end cover respectively, the blade is located between the upper end cover and the lower end cover, the blade is arranged in extension along the axial direction of the rotating shaft and is fixedly connected with the rotating shaft, the external gear and the internal gear are both located on the side of the upper end cover away from the lower end cover, the external gear is arranged on the outer wall of the rotating shaft, the internal gear is sleeved on the external gear and is in mesh with the external gear, the internal gear can rotate relative to the upper end cover in the direction from the upper end cover to the lower end cover to drive the blade to rotate about the rotating shaft, and the locking assembly is used for locking the internal gear and the upper end cover.

[0032] In the embodiment, the upper end cover and the lower end cover adopt disc-shaped structures, the upper end cover and the lower end cover are provided with through holes corresponding to each other, the rotating shaft is arranged in the through hole, the rotating shaft is slidably connected with the inner wall of the through hole, the blade is arranged in extension along the axial direction of the rotating shaft, and the blade is fixedly connected with the side wall of the rotating shaft or is an integral forming structure with the rotating shaft.

[0033] The end of the rotating shaft passing out of the upper end cover is provided with the external gear, the external gear can be arranged in the form of tooth-shaped structures processed in extension along the circumferential direction of the side wall of the rotating shaft, or the diameter of the end of the rotating shaft can be reduced, and then the external gear with an outer diameter smaller than that of the through hole of the upper end cover is fixedly sleeved on the end of the rotating shaft, or the end of the rotating shaft can be processed into a flat shaft, a matching waist hole is formed in the center of the external gear, and the external gear is movably arranged on the rotating shaft through the waist hole.

[0034] The internal gear is in the form of a ring, the internal gear is sleeved on the outside of the external gear and is in mesh with the external gear, it should be noted that more than two rotating shafts on the same circumference can be arranged, correspondingly, more than two external gears are on the same circumference, the internal gear is sleeved on the above-mentioned external gears on the same circumference and is in mesh with each external gear, so that the internal gear can rotate about the center of the circumference.

[0035] The outer wall of the internal gear is fixedly provided with the locking assembly, the upper end cover is provided with a structure matched with the locking assembly to realize the locking of the upper end cover and the internal gear and prevent the rotation of the internal gear. For example, the structure matched with the locking assembly is arranged in the form of a bolt and a hole, or a friction slot is arranged on the upper end cover, and a friction rod is slidably arranged on the internal gear, when the friction rod contacts the inner wall of the friction slot, the relative rotation of the internal gear and the upper end cover can be prevented. It should be noted that the locking assembly plays a role in temporarily locking the angle of the blade after the angle of the blade is adjusted, and the fixation of the blade is mainly realized by the pressing of the upper end cover and the lower end cover to the blade, after the pressing, the locking assembly plays a role in insurance to prevent the failure of the pressing force of the upper end cover and the lower end cover to the blade when the centrifugal force is too large. A lever or a handle or the like can be arranged on the outer wall of the internal gear to facilitate the rotation of the internal gear.

[0036] The adjustable grading wheel provided by the embodiment can drive the outer gear and the rotating shaft to rotate around the axis of the rotating shaft through the inner gear, and then drive the blades to rotate, so that the angle of the blades can be adjusted, and after the adjustment is completed, the locking assembly locks the inner gear and the upper end cover.

[0037] Further, referring to Figure 6 to Figure 7 In an embodiment of the utility model, the locking assembly includes a rotation-stopping pin and a cylinder, the cylinder is fixedly connected with the inner gear, the cylinder is arranged in the direction from the upper end cover to the lower end cover, the rotation-stopping pin is slidingly connected with the inner wall of the cylinder, the upper end cover is provided with a insertion hole, and the rotation-stopping pin slides along the inner wall of the cylinder to be inserted into or separated from the insertion hole.

[0038] In the embodiment, the cylinder is fixedly arranged on the outer wall of the inner gear and extends towards the upper end cover, the rotation-stopping pin is inserted into the cylinder and can slide along the inner wall of the cylinder to be inserted into the insertion hole. The sliding direction of the rotation-stopping pin is perpendicular to the rotating direction of the inner gear, and after the rotation-stopping pin is inserted into the insertion hole, the inner gear can prevent the inner gear from rotating relative to the upper end cover in the direction from the upper end cover to the lower end cover.

[0039] In order to prevent the rotation-stopping pin from being thrown out of the cylinder in the process of centrifugation, the rotation-stopping pin is arranged in the shape of a barbell, that is, two bosses are arranged on the rotation-stopping pin, the cylinder is arranged between the two bosses, the two bosses limit the rotation-stopping pin in the cylinder, the distance between the two bosses is greater than the length of the cylinder, and the distance meets the distance required for the rotation-stopping pin to be inserted into and separated from the insertion hole.

[0040] Further, referring to Figure 4 and Figure 7 In an embodiment of the utility model, the upper end cover is provided with a plurality of insertion holes, and the plurality of insertion holes are arranged in a ring shape at equal intervals.

[0041] In the embodiment, the locking assembly plays a role of temporarily locking the angle of the blades after the adjustment of the angle of the blades is completed, that is, the locking assembly can be used to control the angle of the blades. In order to facilitate the adjustment of the angle of the blades, the upper end cover is provided with a plurality of insertion holes arranged in a ring shape at equal intervals, so that when the rotation-stopping pin is changed from one insertion hole to an adjacent insertion hole, the inner gear rotates by a fixed angle, and then drives the blades to rotate by a fixed angle, thereby playing a role of a scale line. In this way, when it is needed to make the blades rotate by a specific angle, only the number of insertion holes to be changed by the rotation-stopping pin is controlled, so that the adjustment of the blades is more convenient.

[0042] Further, referring to Figure 4 and Figure 7In the embodiment of the utility model, the locking assembly comprises a plurality of rotation-stopping pins and a plurality of cylinder bodies, each rotation-stopping pin is in sliding connection with the inner wall of a cylinder body, and each rotation-stopping pin can be inserted into a corresponding insertion hole.

[0043] In the embodiment, the fixation of the blade is mainly achieved by pressing the blade through the upper end cover and the lower end cover, after being pressed, the locking assembly plays the role of safety, in order to prevent the structural strength of a rotation-stopping pin from being insufficient, therefore, a plurality of rotation-stopping pins and cylinder bodies are arranged on the outer side wall of the internal gear, and the number of the rotation-stopping pins can be less than the number of the insertion holes, mainly for increasing the number of the rotation-stopping pins to enhance the structural strength.

[0044] Please refer to Figure 1 In the embodiment of the utility model, the adjustable grading wheel further comprises a stop plate, the stop plate is arranged on the side of the internal gear away from the upper end cover, one end of the rotating shaft away from the lower end cover is connected with the stop plate, and the internal gear is limited between the stop plate and the upper end cover.

[0045] In the embodiment, in order to prevent the rotation speed from being too high, when the self-weight of the internal gear is insufficient to fix the internal gear, the internal gear can be thrown away, the stop plate is arranged on the side of the internal gear away from the upper end cover, the stop plate is connected with the rotating shaft, the end nut of the rotating shaft presses the stop plate against the upper end cover, and the internal gear is located between the stop plate and the upper end cover, therefore, the internal gear is pressed against the upper end cover by the stop plate, and the effect of preventing the internal gear from being thrown away is achieved.

[0046] Further, please refer to Figure 1 and Figure 4 In the embodiment of the utility model, the side of the upper end cover facing the stop plate is provided with a reinforcing rib, and the reinforcing rib is in abutment with the stop plate.

[0047] In the embodiment, the upper end cover and the stop plate are disc-shaped, the inner gear is ring-shaped and is limited between the upper end cover and the stop plate, and the inner gear is arranged along the edges of the upper end cover and the stop plate to facilitate adjustment of the blades by rotating the inner gear from outside. One side of the inner gear is in sliding abutment with the stop plate, and the other side of the inner gear is in sliding abutment with the upper end cover. The rotating shaft is arranged in the ring formed by the inner gear. Thus, a cavity is formed by the stop plate, the inner gear and the upper end cover. When the blades are locked after adjustment, the nuts at the two ends of the rotating shaft are tightened to press the stop plate and the lower end cover, and the blades are locked by friction. At this time, the stop plate and the upper end cover will bear a large bending force, and thus may be deformed greatly, affecting the rotation of the blades next time. Therefore, a reinforcing rib is arranged on the side wall of the upper end cover facing the stop plate, the reinforcing rib is in abutment with the stop plate, the stop plate and the upper end cover bear force together, the cross-sectional size is increased, the cross-sectional moment of inertia of the upper end cover is increased, and the bending deformation resistance of the upper end cover is improved. The large deformation of the upper end cover is avoided, and the blades can be rotated smoothly between the upper end cover and the lower end cover next time.

[0048] Further, refer to Figure 4 In an embodiment of the utility model, the reinforcing rib extends from the center of the upper end cover to the edge of the upper end cover.

[0049] In the embodiment, the upper end cover and the stop plate are disc-shaped, the inner gear is ring-shaped and is limited between the upper end cover and the stop plate, and the inner gear is arranged along the edges of the upper end cover and the stop plate to facilitate adjustment of the blades by rotating the inner gear from outside. One side of the inner gear is in sliding abutment with the stop plate, and the other side of the inner gear is in sliding abutment with the upper end cover. The rotating shaft is arranged in the ring formed by the inner gear. Thus, a cavity is formed by the stop plate, the inner gear and the upper end cover. When the blades are locked after adjustment, the nuts at the two ends of the rotating shaft are tightened to press the stop plate and the lower end cover, and the blades are locked by friction. At this time, the stop plate and the upper end cover will bear a large bending force, and thus may be deformed greatly, affecting the rotation of the blades next time. Therefore, a reinforcing rib is arranged on the side wall of the upper end cover facing the stop plate, the reinforcing rib is in abutment with the stop plate, the stop plate and the upper end cover bear force together, the cross-sectional size is increased, the cross-sectional moment of inertia of the upper end cover is increased, and the bending deformation resistance of the upper end cover is improved. The large deformation of the upper end cover is avoided, and the blades can be rotated smoothly between the upper end cover and the lower end cover next time.

[0050] Specifically, refer to Figure 1 to Figure 2In the embodiment of the utility model, the rotating shaft passes through the stop plate, the upper end cover and the lower end cover in sequence, the rotating shaft has a first end and a second end, the first end is located on the side of the stop plate away from the upper end cover, the second end is located on the side of the lower end cover away from the upper end cover, the first end is screwed with a first nut, the second end is screwed with a second nut, the side wall of the first nut facing the stop plate abuts against the stop plate, and the side wall of the second nut facing the lower end cover abuts against the lower end cover.

[0051] In the embodiment, the two ends of the blade abut against the upper end cover and the lower end cover respectively, the two ends of the rotating shaft are provided with external threads, and matched nuts are arranged, the nuts at the two ends are locked to press the stop plate and the lower end cover against the blade, that is, the upper end cover and the lower end cover are pressed against the blade, and the angle of the blade is fixed by friction force. In addition, the blade and the upper and lower end covers are detachable structures, relative to the grading wheel with the fixed blade, when the blade is damaged, the blade can be replaced without replacing the entire grading wheel, thereby saving the replacement cost.

[0052] Further, refer to Figure 1 and Figure 3 In the embodiment of the utility model, the adjustable grading wheel further comprises a locking shaft, one end of the locking shaft is formed with a boss, the other end of the locking shaft is screwed with a third nut, the locking shaft passes through the lower end cover and the upper end cover in sequence, the boss is arranged on the side of the lower end cover away from the upper end cover and abuts against the lower end cover, and the third nut is arranged on the side of the upper end cover away from the lower end cover and abuts against the upper end cover.

[0053] In the embodiment, the center of the upper end cover and the lower end cover is provided with a shaft hole, the locking shaft is arranged in the shaft hole through the shaft hole, the locking shaft enters the grading wheel from the side of the lower end cover and exits from the upper end cover, and the side wall of the boss abuts against the lower end cover. The side wall of the locking shaft on the outside of the upper end cover is provided with external threads, the third nut is matched with the external threads, the nut is tightened to the upper end cover, the connection and fixation of the locking shaft and the grading wheel can be realized through friction force, the pressure of the upper end cover and the lower end cover on the blade is increased, and the angle of the blade is fixed. The locking shaft can also be connected to the rotating motor to realize the rotation of the grading wheel.

[0054] Further, refer to Figure 1 and Figure 4 In the embodiment of the utility model, the adjustable grading wheel comprises a plurality of rotating shafts and a plurality of blades, the rotating shafts are arranged in a ring shape, each blade is fixedly connected with a rotating shaft, the end of each rotating shaft located on the side of the upper end cover away from the lower end cover is provided with an external gear, and an internal gear is arranged on the outside of all the external gears and meshes with each external gear.

[0055] In the embodiment, the upper end cover and the lower end cover adopt disc-shaped structures, the upper end cover is provided with a plurality of through holes in annular distribution, the lower end cover is also provided with a plurality of through holes in annular distribution, the through holes of the upper end cover correspond to the through holes of the lower end cover one by one, the rotating shafts are arranged in the through holes, the rotating shafts are in sliding connection with the inner walls of the through holes, the blades are arranged along the axial direction of the rotating shafts, and the blades are fixedly connected to the side walls of the rotating shafts or are in one-piece forming structure with the rotating shafts. The end portion of each rotating shaft on the side away from the lower end cover is provided with an external gear, an internal gear is sleeved on the outer side of all the external gears and is in meshing with each external gear, so that the angle of the plurality of blades can be adjusted by rotating the internal gear, and each blade rotates simultaneously and the angle of each blade is the same.

[0056] The above merely illustrates the exemplary embodiments of the utility model, and does not limit the patent scope of the utility model, and any equivalent structural transformation, direct / indirect application in other related technical fields under the technical concept of the utility model, and the contents of the utility model specification and drawings are included in the patent protection scope of the utility model.

Claims

1. An adjustable grading wheel, characterized by, The adjustable grading wheel comprises an upper end cover (1), a lower end cover (2), a rotating shaft (3), a blade (4), an external gear (51) and an internal gear (52), and the external gear (51) is provided with a locking assembly (6); The upper end cover (1) and the lower end cover (2) are arranged in parallel and are spaced apart, and the rotating shaft (3) passes through the upper end cover (1) and the lower end cover (2) in sequence and is rotatably connected with the upper end cover (1) and the lower end cover (2) respectively; The blade (4) is located between the upper end cover (1) and the lower end cover (2), and the blade (4) is arranged in extension along the axial direction of the rotating shaft (3) and is fixedly connected with the rotating shaft (3); The external gear (51) and the internal gear (52) are located on the side of the upper end cover (1) away from the lower end cover (2), the external gear (51) is arranged on the outer wall of the rotating shaft (3), and the internal gear (52) is sleeved on the external gear (51) and is in meshing connection with the external gear (51); The internal gear (52) can rotate relative to the upper end cover (1) in the direction from the upper end cover (1) to the lower end cover (2) to drive the blade (4) to rotate around the rotating shaft (3), and the locking assembly (6) is used for locking the internal gear (52) and the upper end cover (1).

2. The adjustable gauge wheel of claim 1, wherein, The locking assembly (6) comprises a rotation-stopping pin (61) and a cylinder (62), the cylinder (62) is fixedly connected with the internal gear (52), the cylinder (62) is arranged in extension along the direction from the upper end cover (1) to the lower end cover (2), and the rotation-stopping pin (61) is in sliding connection with the inner wall of the cylinder (62); The upper end cover (1) is provided with a bushing (1a), and the rotation-stopping pin (61) slides along the inner wall of the cylinder (62) to be inserted into or separated from the bushing (1a).

3. The adjustable gauge wheel of claim 2, wherein, The upper end cover (1) is provided with a plurality of bushings (1a), and the plurality of bushings (1a) are arranged in a ring shape at equal intervals.

4. The adjustable gauge wheel of claim 3, wherein, The locking assembly (6) comprises a plurality of rotation-stopping pins (61) and a plurality of cylinders (62), each rotation-stopping pin (61) is in sliding connection with the inner wall of a cylinder (62), and each rotation-stopping pin (61) can be inserted into a bushing (1a) correspondingly.

5. The adjustable gauge wheel of claim 1, wherein, The adjustable grading wheel further comprises a stop plate (7), and the stop plate (7) is arranged on the side of the internal gear (52) away from the upper end cover (1); One end of the rotating shaft (3) away from the lower end cover (2) is connected with the stop plate (7), and the internal gear (52) is limited between the stop plate (7) and the upper end cover (1).

6. The adjustable gauge wheel of claim 5, wherein, The side of the upper end cover (1) facing the stop plate (7) is provided with a reinforcing rib (11), and the reinforcing rib (11) is in abutment with the stop plate (7).

7. The adjustable gauge wheel of claim 6, wherein, The reinforcing rib (11) is arranged in extension along the center of the upper end cover (1) to the edge of the upper end cover (1).

8. The adjustable gauge wheel of claim 5, wherein, The rotating shaft (3) passes through the stop plate (7), the upper end cover (1) and the lower end cover (2) in sequence, and the rotating shaft (3) has a first end (31) and a second end (32); The first end (31) is located on the side of the stop plate (7) away from the upper end cover (1), the second end (32) is located on the side of the lower end cover (2) away from the upper end cover (1), the first end (31) is screwed with a first nut (81), and the second end (32) is screwed with a second nut (82); The side wall of the first nut (81) faces the stop plate (7) and abuts against the stop plate (7), and the side wall of the second nut (82) faces the lower end cover (2) and abuts against the lower end cover (2).

9. An adjustable grading wheel as claimed in any one of claims 1 to 8, wherein, The adjustable grading wheel further comprises a locking shaft (9), one end of the locking shaft (9) is formed with a boss (91), and the other end of the locking shaft (9) is screwed with a third nut (83); The locking shaft (9) sequentially passes through the lower end cover (2) and the upper end cover (1), the boss (91) is arranged on the side of the lower end cover (2) away from the upper end cover (1) and abuts against the lower end cover (2), and the third nut (83) is arranged on the side of the upper end cover (1) away from the lower end cover (2) and abuts against the upper end cover (1).

10. An adjustable grading wheel as claimed in any one of claims 1 to 8, wherein, The adjustable grading wheel comprises a plurality of rotating shafts (3) and a plurality of blades (4), the rotating shafts (3) are arranged in a ring shape, and each blade (4) is fixedly connected with a rotating shaft (3); The end of each rotating shaft (3) on the side of the upper end cover (1) away from the lower end cover (2) is provided with an outer gear (51), and an inner gear (52) is sleeved outside the rotating shafts (3) and meshes with each outer gear (51).

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