Asphalt mixing device based on rotation of principal stress axes

Abstract

The present application relates to the technical fields of asphalt mixing, and especially relates to an asphalt mixing device based on the rotation of principal stress axes, which comprises a mixing cavity, a driving shaft extending into the mixing cavity and capable of rotating, a moving shaft in sliding connection with the driving shaft and capable of rotating with the driving shaft, a rotation locking member installed on the driving shaft and the moving shaft, mixing blades installed on the moving shaft through the rotation locking member, and a friction structure arranged in the mixing cavity, wherein, in the mixing working state, there is an initial gap between the mixing blades and the friction structure, and when the moving shaft moves, the rotation locking member can drive the mixing blades to move and rotate to approach the friction structure to reduce the initial gap. In the process of rotating and mixing asphalt by the mixing blades, a larger initial gap is arranged between the mixing blades and the friction structure, so that large stone particles are prevented from being broken, and the problem of unbalanced size matching of stone particles in asphalt is solved.

Description

Technical Field

[0001] This invention relates to the field of asphalt mixing technology, and in particular to an asphalt mixing device based on the rotation of the principal stress axis. Background Technology

[0002] In an asphalt mixing plant, the mixing unit is the final equipment that completes the mixing of materials to form asphalt products. The screening equipment in the asphalt mixing plant will screen the raw stone according to its size and store it separately. When mixing is required, stones of different sizes are put into the mixing unit according to the technical standard ratio, and then filler and asphalt liquid are added. The mixing is finally completed by the mixing unit.

[0003] In asphalt mixing plants, both the inlet and outlet ends of the mixing unit are connected to related equipment. For example, the inlet end of the mixing unit needs to be connected to the feeding equipment for stones, fillers, and asphalt liquid, while the outlet needs to be connected to the storage equipment for storing finished asphalt. As a result, it is difficult for the rotating mixing blades inside the mixing unit to remove residues. If a scraping structure that fits the blades is directly installed, the gap between the blades and the scraping structure will be too small, which will squeeze the stones between the two, causing the stones to break. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the small gap between the scraping structure and the blades causes the stones to be broken.

[0005] The above-mentioned technical problems are solved by the following technical solution: This invention proposes an asphalt mixing device based on the rotational action of the principal stress axis, comprising, Mixing chamber; A drive shaft extends into the mixing chamber and is rotatable; A movable shaft that is slidably connected to the drive shaft and can rotate with the drive shaft; A rotary locking element, which is mounted on the drive shaft and the moving shaft; The mixing blade is mounted on the moving shaft via the rotary locking element; A friction structure is disposed inside the mixing chamber; In the mixed working state, there is an initial gap between the mixing blade and the friction structure. When the moving shaft moves, the rotating locking member can drive the mixing blade to move and rotate to get closer to the friction structure and reduce the initial gap.

[0006] In a preferred embodiment of the asphalt mixing device based on the rotation of the principal stress axis described in this invention: the friction structure is a horizontal plate, and the horizontal plate is fixed inside the mixing chamber.

[0007] In a preferred embodiment of the asphalt mixing device based on the rotation of the principal stress axis according to the present invention: there are two moving shafts and two driving shafts, and each moving shaft is equipped with a mixing blade. The hybrid blades on any one of the moving shafts can form a friction structure.

[0008] In a preferred embodiment of the asphalt mixing device based on the rotation of the principal stress axis according to the present invention: the rotation locking member includes a rotating body rotatably mounted on the moving shaft, the mixing blades being mounted on the rotating body; a gear mounted on the rotating body; and a rack mounted on the drive shaft and meshing with the rack; when the moving shaft moves relative to the drive shaft, it can drive the gear to rotate relative to the rack.

[0009] In a preferred embodiment of the asphalt mixing device based on the rotation of the principal stress axis described in this invention: a limiting post is installed at the end of the rack, and a limiting hole is opened on the radial sidewall of the gear; the gear is rotated until the limiting post can be inserted into the limiting hole.

[0010] In a preferred embodiment of the asphalt mixing device based on the rotation of the principal stress axis according to the present invention: the rack is slidably mounted on the drive shaft; the asphalt mixing device based on the rotation of the principal stress axis further includes an unlocking component and a limiting component, the unlocking component is mounted on the end of the rack, the unlocking component can engage with the limiting component when not pressed to limit the rack, and the gear can press the unlocking component when it moves to the end of the rack to unlock the rack.

[0011] In a preferred embodiment of the asphalt mixing device based on the rotation of the principal stress axis described in this invention: the unlocking member is rotatably mounted on the end of the rack, and a locking pin is installed on the unlocking member; the limiting member has a through groove and a locking groove connected to the through groove, and the locking pin can be engaged inside the locking groove.

[0012] In a preferred embodiment of the asphalt mixing device based on the rotation of the principal stress axis described in this invention: an elastic element is also provided inside the through groove, and the locking column can press the elastic element when it moves inside the through groove.

[0013] In a preferred embodiment of the asphalt mixing device based on the rotation of the principal stress axis according to the present invention: the drive shaft is connected to a drive component, and the drive component is used to drive the drive shaft to rotate.

[0014] In a preferred embodiment of the asphalt mixing device based on the rotation of the principal stress axis according to the present invention: the movable shaft is connected to a push-pull member, which can drive the movable shaft to move relative to the drive shaft.

[0015] The beneficial effect of this invention is that, during the process of mixing asphalt by rotating the mixing blades, a large initial gap is set between the blades and the friction structure to avoid large particles of stone being broken, thus preventing an imbalance in the size ratio of stones in the asphalt. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the overall structure of the present invention is shown; Figure 2 A top view of the overall structure of the present invention is shown; Figure 3 A schematic diagram of the installation position of the rotary locking component of the present invention is shown; Figure 4 A schematic diagram of the rotating locking component structure of the present invention is shown; Figure 5 A schematic diagram showing the positions of the hybrid blades and cross plate of the present invention is shown; Figure 6 The diagram shows the first state of the hybrid blades and cross plate; Figure 7 A second state diagram of the hybrid blades and crossplate is shown; Figure 8 The diagram shows a third state of the hybrid blades and cross plates; Figure 9 A schematic diagram showing the positions of the first and second blades is provided. Figure 10 A schematic diagram of the limiting post and limiting hole is shown; Figure 11 A structural schematic diagram of the unlocking and restraining components is shown; Figure 12 It shows Figure 11 Enlarged view of point A in the middle; Figure 13 The diagram shows the first state of the first and second blades; Figure 14 The second state diagram of the first and second blades is shown; Figure 15 The diagram shows the third state of the first and second blades. Figure 16 The diagram shows the fourth state of the first and second blades; Figure 17 The fifth state diagram of the first and second blades is shown.

[0017] 100. Mixing chamber; 101. First end; 102. Second end; 200. Drive shaft; 201. Drive component; 300. Moving shaft; 301. Push-pull component; 302. Long through groove; 400. Rotary locking component; 401. Rotating body; 402. Gear; 403. Rack; 404. Limiting post; 405. Limiting hole; 500. Mixing blade; 500a. First blade; 500b. Second blade; 501. First surface; 502. Second surface; 503. Third surface; 504. Fourth surface; 600. Friction structure; 601. Horizontal plate; 700. Initial gap; 800. Unlocking component; 801. Locking post; 802. Pressurized end; 803. Acting end; 900. Limiting component; 901. Through groove; 902. Locking groove; 903. Elastic component. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0020] Reference Figure 1 This embodiment provides an asphalt mixing device based on the rotation of the principal stress axis, including a mixing chamber 100, which is a chamber in the entire asphalt mixing plant. The mixing chamber 100 has a first end 101 and a second end 102. The first end 101 is connected to the raw material supply structure, such as a stone distribution structure, a filler replenishment structure, and an asphalt inflow structure. Stones, fillers, and asphalt enter the mixing chamber 100 through the first end 101 and are mixed inside the mixing chamber 100. The second end 102 is connected to the storage structure. The mixed material enters the storage structure through the second end 102. It should be noted that the second end 102 needs to be equipped with an openable door. During mixing, the door is in a closed state, allowing the material to be mixed inside the mixing chamber 100. When mixing is complete, the door is in an open state, and the mixed material enters the storage structure through the second end 102.

[0021] Please refer to Figure 1 and Figure 2The asphalt mixing device based on the rotation of the principal stress axis includes a drive shaft 200, which extends into the mixing chamber 100 and is rotatable. In this embodiment, the drive shaft 200 is a shaft that spans the mixing chamber 100. The drive shaft 200 is connected to a drive component 201, which is used to drive the drive shaft 200 to rotate. The drive component 201 can be a drive motor, which is connected to the drive shaft 200 through the output shaft of the drive motor, thereby driving the drive shaft 200 to rotate and providing power for the entire mixing operation.

[0022] Please refer to Figure 1 and Figure 2 The asphalt mixing device based on the rotation of the principal stress axis includes a movable shaft 300, which is slidably connected to a drive shaft 200 and can rotate with the drive shaft 200. In this embodiment, the drive shaft 200 is a tubular structure with a cavity inside. The movable shaft 300 extends into the cavity of the drive shaft 200. Furthermore, the diameter of the movable shaft 300 is adapted to the inner diameter of the drive shaft 200. The movable shaft 300 is connected to a push-pull member 301, which can drive the movable shaft 300 to move. For example, the push-pull member 301 can be a hydraulic rod. Through the extension and retraction of the hydraulic rod, the movable shaft 300 can be pushed and pulled to move. Of course, the end of the hydraulic rod can be connected to the movable shaft 300 through a bearing, so that the drive shaft 200 can drive the movable shaft 300 to rotate when it rotates.

[0023] Please refer to Figure 3 and Figure 4 The asphalt mixing device based on the rotation of the principal stress axis includes a rotation locking component 400, which is mounted on a drive shaft 200 and a moving shaft 300. The rotation locking component 400 includes a rotating body 401, a gear 402, and a rack 403. The rotating body 401 is rotatably mounted on the moving shaft 300; the gear 402 is mounted on the rotating body 401; and the rack 403 is mounted on the drive shaft 200 and meshes with the gear. When the moving shaft 300 moves relative to the drive shaft 200, it can drive the gear 402 to move relative to the rack 403 and rotate.

[0024] like Figure 4In this embodiment, the rotating body 401 is a columnar structure, passing through the moving shaft 300. The two ends of the rotating body 401 extend to both sides of the rotating body 401. A long through groove 302 is provided on the moving shaft 300, and the rotating body 401 also passes through the long through groove 302. The gear 402 is installed on the rotating body 401 and can rotate synchronously with the rotating body 401. The installation position of the gear 402 is located in the long through groove 302. In addition, the rack 403 is installed on the radial side wall of the cavity of the drive shaft 200. When the push-pull member 301 drives the moving shaft 300 to move, the moving shaft 300 drives the rotating body 401 to move, thereby driving the gear 402 to move. When the gear 402 moves, it rotates under the action of the rack 403, thereby driving the rotating body 401 to rotate.

[0025] refer to Figure 2 and Figure 4 The asphalt mixing device based on the rotation of the principal stress axis includes a mixing blade 500, which is mounted on the moving shaft 300 via a rotation locking member 400. Furthermore, the mixing blade 500 is mounted on the rotating body 401 of the rotation locking member 400. Under normal mixing conditions, the mixing blade 500 can be in an inclined state, thereby increasing the contact area of ​​the mixing blade 500 with asphalt during the rotational mixing process. Of course, as the push-pull member 301 drives the moving shaft 300 to move, the rotating body 401 rotates, which in turn drives the mixing blade 500 to rotate.

[0026] refer to Figure 1 and Figure 2 The asphalt mixing device based on the rotation of the principal stress axis also includes a friction structure 600, which is located inside the mixing chamber 100. In the mixing working state, there is an initial gap 700 between the mixing blade 500 and the friction structure 600. When the moving shaft 300 moves, the rotating locking member 400 can drive the mixing blade 500 to move and rotate to get closer to the friction structure 600 and reduce the initial gap 700.

[0027] During the asphalt mixing process, the stones to be added are first classified according to size and then added to the mixing chamber 100 according to the proportion. In this embodiment, the reason for setting an initial gap 700 between the mixing blade 500 and the friction structure 600 during the mixing process is to avoid the problem of the mixing blade 500 and the friction structure 600 being too close during the asphalt mixing process, causing the stones to be squeezed and broken. Therefore, a larger initial gap 700 is set between the mixing blade 500 and the friction structure 600 during the asphalt mixing process to avoid large stones being broken and causing an imbalance in the size ratio of stones in the asphalt.

[0028] After mixing, when it is necessary to remove the adhering substances from the mixing blade 500, the moving shaft 300 can be moved by the push-pull member 301. The moving shaft 300 drives the rotating body 401 to move towards the friction structure 600, which allows the mixing blade 500 to approach the friction structure 600. During this process, the mixing blade 500 can also rotate, so that when the mixing blade 500 approaches the friction structure 600, it can rotate to a state parallel to the friction structure 600. At this time, the moving shaft 300 can be driven to rotate by the drive shaft 200, which can drive the mixing blade 500 to rotate. When the mixing blade 500 rotates, the asphalt residue adhering to its surface can be removed by friction by the friction structure 600.

[0029] Please refer to Figures 5 to 8 In this embodiment, the friction structure 600 is a horizontal plate 601, which is fixed inside the mixing chamber 100. The number of horizontal plates 601 needs to be one more than the number of mixing blades 500. The mixing blades 500 have a first surface 501 and a second surface 502 that need to be cleaned. When cleaning the first surface 501, the push-pull member 301 pulls the moving shaft 300 to move in the first direction, which is marked as X. When the mixing blades 500 are close to the friction structure 600 on the right and reach a parallel state, the first surface 501 is directly facing the friction structure 600 on the right. When cleaning the second surface 502, the push-pull member 301 pushes the moving shaft 300 to move in the second direction, which is marked as Y. When the mixing blades 500 are close to the friction structure 600 on the left and reach a parallel state, the second surface 502 is directly facing the friction structure 600 on the left.

[0030] For example, in a mixed working state, reference Figure 6 The mixed blades 500 are kept at a 45-degree angle, for reference. Figure 7 When the mixing blade 500 moves towards the right-side friction structure 600 in the first direction, it rotates 135 degrees so that the first surface 501 is close to and directly facing the right-side friction structure 600. After the first surface 501 is cleaned, the mixing blade 500 moves in the second direction, as shown in the reference. Figure 8 Meanwhile, the mixing blade 500 rotates 360 degrees so that the second surface 502 is close to and directly facing the friction structure 600 on the left. The rotation angle of the mixing blade 500 during movement can be controlled according to the mesh count of the gear 402 and the rack 403, which will not be elaborated here.

[0031] Please refer to Figure 9As an optional embodiment, in this embodiment, the horizontal plate 601 is no longer needed as a friction structure 600. There are two moving shafts 300 and two driving shafts 200, and each moving shaft 300 is equipped with a mixing blade 500. The mixing blade 500 on any one of the moving shafts 300 can constitute a friction structure 600. That is, the mixing blades 500 on the two moving shafts 300 can serve as friction structures 600 for each other. It is not necessary to add a horizontal plate 601 inside the mixing chamber 100 as a friction structure 600. First, the number of mixing blades 500 is increased, so the mixing efficiency of the mixing blades 500 is higher. Second, the fixed horizontal plate 601 is avoided from interfering with the mixing blades 500 agitating the asphalt raw materials. Of course, the two moving shafts 300 need to be moved by two push-pull parts 301, and the two driving shafts 200 also need to be driven by two driving parts 201.

[0032] Similarly, in the mixed working state, there is also an initial gap 700 between the mixing blades 500 on the two moving shafts 300. We use Figures 13 to 17 This thumbnail format illustrates the cleaning process of the mixing blades 500 on the two moving shafts 300. In this embodiment, refer to... Figure 13 First, the mixing blades 500 on both moving axes 300 are tilted at 45 degrees. The mixing blade 500 on one moving axis 300 is labeled as the first blade 500a, and the mixing blade 500 on the other moving axis 300 is labeled as the second blade 500b. In this figure, the first blade 500a has a first surface 501 and a second surface 502 on its two sides, and the second blade 500b has a third surface 503 and a fourth surface 504 on its two sides. (Refer to...) Figure 14 First, push the moving shaft 300 of the second blade 500b, causing the second blade 500b to rotate 45 degrees counterclockwise and remain vertical. Then refer to... Figure 15 Pulling the moving shaft 300 of the first blade 500a causes the first blade 500a to rotate 135 degrees clockwise. At this time, the first surface 501 and the third surface 503 are close to each other and face each other. The driving shaft 200 corresponding to the first blade 500a is driven by the driving component 201, and the first blade 500a rotates. At this time, the asphalt residue adhering to the surface of the first surface 501 of the first blade 500a and the third surface 503 of the second blade 500b can be removed by friction.

[0033] After removal is complete, refer to Figure 16 The moving shaft 300 of the first blade 500a is pushed, causing the first blade 500a to rotate 180 degrees, and then referenced. Figure 17The second blade 500b is pushed to move the shaft 300, causing the second blade 500b to rotate 180 degrees. At this time, the second surface 502 of the first blade 500a and the fourth surface 504 of the second blade 500b are close to each other and face each other. The drive shaft 200 corresponding to the first blade 500a is driven by the drive member 201, and the first blade 500a rotates. At this time, the asphalt residue adhering to the surface of the second surface 502 of the first blade 500a and the fourth surface 504 of the second blade 500b can be removed by friction. Therefore, in this embodiment, it is not necessary to set the horizontal plate 601 as the friction structure 600. The first blade 500a and the second blade 500b are each other's friction structures 600.

[0034] Normally, when the moving shaft 300 is pulled, the first blade 500a and the second blade 500b are misaligned rather than in contact. However, in some cases, after cleaning, when the rotation of the drive shaft 200 is stopped, the positions of the first blade 500a and the second blade 500b are better aligned and in contact. At this time, if the moving shaft 300 is pulled or pushed, the first blade 500a and the second blade 500b will interfere and cannot rotate. In this case, the problem can be solved by rotating the drive shaft 200 by a certain angle so that the first blade 500a and the second blade 500b are not in contact.

[0035] To prevent this problem, please refer to... Figure 10 In one embodiment of the present invention, a limiting post 404 is installed at the end of the rack 403, and a limiting hole 405 is formed on the radial sidewall of the gear 402. When the gear 402 rotates to the point where the limiting post 404 can be inserted into the limiting hole 405, in this case, as the first blade 500a approaches the second blade 500b, the first blade 500a will rotate first. When there is still a certain horizontal distance between the first blade 500a and the second blade 500b, the gear 402 corresponding to the first blade 500a disengages from the teeth of the rack 403, thereby disengaging. At the same time, the limiting hole 405... Corresponding to the position of the limiting post 404, the gear 402 is pulled to move so that the limiting post 404 is inserted into the limiting hole 405. Therefore, the gear 402 will not rotate as it continues to move, but will remain vertical and approach the second blade 500b in the horizontal direction. This ensures that the first blade 500a will not rotate during the later part of its stroke when it approaches the second blade 500b, and that the first blade 500a will not rotate during the earlier part of its stroke when it moves away from the second blade 500b. This avoids interference caused by the rotation of the first blade 500a and the second blade 500b due to rotation.

[0036] refer to Figure 11 and Figure 12In another embodiment, the rack 403 is slidably mounted on the drive shaft 200; the asphalt mixing device based on the rotation of the principal stress axis also includes an unlocking member 800 and a limiting member 900. The unlocking member 800 is mounted on the end of the rack 403. When the unlocking member 800 is not pressed, it can engage with the limiting member 900 to limit the rack 403. When the gear 402 moves to the end of the rack 403, it can press the unlocking member 800 to unlock the rack 403. The rack 403 can be mounted on the drive shaft 200 through a slide rail structure. The unlocking member 800 is rotatably mounted on the end of the rack 403. A locking pin 801 is mounted on the unlocking member 800. The limiting member 900 has a through groove 901 and a locking groove 902 connected to the through groove 901. The locking pin 801 can be engaged inside the locking groove 902.

[0037] The unlocking component 800 has a pressure end 802 and an actuating end 803 at its two ends. The locking pin 801 is installed on the actuating end 803. The unlocking component 800 is installed on the end of the rack 403 via an automatic spring-loaded rotating shaft. When the moving shaft 300 moves and pulls the gear 402, the gear 402 moves toward the unlocking component 800 and rotates. When the gear 402 reaches the end of the rack 403 and contacts and presses the pressure end 802 of the unlocking component 800, the unlocking component 800 rotates counterclockwise, causing the locking pin 801 at the actuating end 803 to disengage from the inside of the lock groove 902 and reach the through groove 901. At this time, by pulling the moving shaft 300 to continue pulling the gear 402, the gear 402 can pull the unlocked rack 403 to move. Therefore, the movement process of the gear 402 in this embodiment is the same as that in the previous embodiment, which is to first rotate and then translate.

[0038] It should be further explained that the lock groove 902 is an arc-shaped groove, the center of which is the rotation axis of the unlocking member 800. When the unlocking member 800 rotates counterclockwise, the lock pin 801 can rotate around the rotation axis of the unlocking member 800 to disengage from the lock groove 902. When the pressing end is not under pressure, the automatic rebound shaft can keep the lock pin 801 always inside the lock groove 902, thereby preventing the rack 403 from moving and achieving the function of positioning the rack 403.

[0039] An elastic element 903 is also provided inside the through groove 901. When the locking pin 801 moves inside the through groove 901, it can press the elastic element 903. The function of the elastic element 903 is to help the unlocking element 800 and the rack 403 reset. When the locking pin 801 disengages from the locking groove 902 and moves along the through groove 901, it will press the elastic element 903. When the pressure from the gear 402 disappears, the elastic element 903 can push the locking pin 801, thereby pushing the unlocking element 800 and the rack 403 to reset. The elastic element 903 can be a spring.

[0040] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. An asphalt mixing device based on the rotational action of the principal stress axis, characterized in that: include, Mixing chamber (100); A drive shaft (200) extends into the mixing chamber (100) and is rotatable; A movable shaft (300) is slidably connected to the drive shaft (200) and is rotatable with the drive shaft (200); A rotary locking element (400) is mounted on the drive shaft (200) and the moving shaft (300); A mixing blade (500) is mounted on a moving shaft (300) via the rotary locking member (400); A friction structure (600) is disposed inside the mixing chamber (100); In the mixed working state, there is an initial gap (700) between the mixing blade (500) and the friction structure (600). When the moving shaft (300) moves, the rotating locking member (400) can drive the mixing blade (500) to move and rotate to get closer to the friction structure (600) and reduce the initial gap (700).

2. The asphalt mixing device based on the rotation of the principal stress axis according to claim 1, characterized in that: The friction structure (600) is a horizontal plate (601), which is fixed inside the mixing chamber (100).

3. The asphalt mixing device based on the rotation of the principal stress axis according to claim 1, characterized in that: The number of the moving shaft (300) and the drive shaft (200) are both two, and each of the moving shafts (300) is equipped with a mixing blade (500). The hybrid blades (500) on any one of the moving shafts (300) can form a friction structure (600).

4. The asphalt mixing device based on the rotational action of the principal stress axis according to claim 1, 2, or 3, characterized in that: The rotary locking element (400) includes, A rotating body (401) is rotatably mounted on the moving shaft (300), and the mixing blades (500) are mounted on the rotating body (401); Gear (402), which is mounted on the rotating body (401); A rack (403) is mounted on the drive shaft (200) and meshes with the rack (403); When the movable shaft (300) moves relative to the drive shaft (200), it can drive the gear (402) to move and rotate relative to the rack (403).

5. The asphalt mixing device based on the rotation of the principal stress axis according to claim 4, characterized in that: The rack (403) is fitted with a limit post (404) at its end, and the gear (402) has a limit hole (405) on its radial sidewall. The gear (402) rotates until the limiting post (404) can be inserted into the limiting hole (405).

6. The asphalt mixing device based on the rotation of the principal stress axis according to claim 4, characterized in that: The rack (403) is slidably mounted on the drive shaft (200); The asphalt mixing device based on the rotation of the principal stress axis also includes an unlocking component (800) and a limiting component (900). The unlocking component (800) is installed at the end of the rack (403). When the unlocking component (800) is not pressed, it can engage with the limiting component (900) to limit the rack (403). When the gear (402) moves to the end of the rack (403), it can press the unlocking component (800) to unlock the rack (403).

7. The asphalt mixing device based on the rotation of the principal stress axis according to claim 6, characterized in that: The unlocking component (800) is rotatably mounted on the end of the rack (403), and a locking pin (801) is mounted on the unlocking component (800). The limiting member (900) has a through groove (901) and a locking groove (902) connected to the through groove (901), and the locking pin (801) can be engaged inside the locking groove (902).

8. The asphalt mixing device based on the rotation of the principal stress axis according to claim 7, characterized in that: The through groove (901) is also provided with an elastic element (903), and the locking pin (801) can press the elastic element (903) when it moves inside the through groove (901).

9. The asphalt mixing device based on the rotational action of the principal stress axis according to claim 1, 2, or 3, characterized in that: The drive shaft (200) is connected to a drive component (201), which is used to drive the drive shaft (200) to rotate.

10. The asphalt mixing device based on the rotational action of the principal stress axis according to claim 1, 2, or 3, characterized in that: The movable shaft (300) is connected to a push-pull member (301), which can drive the movable shaft (300) to move relative to the drive shaft (200).

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