Double-shaft differential type asphalt mixture high-efficiency mixing drum
By combining a dual-shaft differential speed design with spiral blades and cutting blades, the problems of uneven mixing and dead zones in single-shaft mixing structures are solved, achieving efficient and uniform mixing of asphalt mixtures and improving the density and durability of the mixtures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MEIZHOU XINYESHUN ASPHALT PRODUCTS CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-21
AI Technical Summary
The existing asphalt mixture mixing drum adopts a single-shaft mixing structure, which results in poor mixing fullness and efficiency, poor external mixing coverage, and easy formation of mixing dead zones, affecting the density and durability of the mixture.
It adopts a dual-shaft differential speed design, in which the first and second shafts rotate at different speeds to form a speed difference between the inner and outer mixing structures. Combined with the spiral blades and cutting blades, it achieves compound motion, breaks up asphalt agglomerates and lumps, eliminates mixing dead zones, and ensures uniform mixing.
It significantly improves the mixing effect and efficiency of asphalt mixtures, ensures that aggregates and asphalt are fully coated, reduces clumping and sedimentation, improves the density and durability of the mixture, and eliminates mixing dead zones.
Smart Images
Figure CN224524553U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of asphalt mixing technology, and more specifically, to a dual-shaft differential speed asphalt mixture high-efficiency mixing drum. Background Technology
[0002] Asphalt is a black, viscous substance derived from petroleum, primarily used for road paving and waterproofing projects. Its properties include good adhesion, water resistance, and durability, but it is highly temperature-sensitive, softening easily at high temperatures and becoming brittle at low temperatures. Asphalt mixtures consist of asphalt, aggregates (crushed stone, sand), and fillers. Mixing is a crucial step in ensuring uniform mixing. Through mixing, the asphalt fully coats the aggregates, forming a uniform and stable structure, preventing segregation, and improving the strength, density, and resistance to deformation of the mixture, thereby extending the service life of the pavement. Mixing also ensures uniform material temperature, guaranteeing workability during construction.
[0003] Existing asphalt mixing drums mostly employ a single-shaft drive, single-unit mixing structure, which can only tumble the asphalt mixture inside the drum through a single rotation speed and direction. This reliance on a single rotation speed and direction during mixing leads to insufficient mixing of asphalt and aggregate, affecting the thoroughness and efficiency of the mixing process. Due to the lack of differential shearing action, asphalt is prone to layering or agglomeration within the drum, making it difficult to form a uniform and stable mixture, thus impacting the final pavement's density and durability. Furthermore, the single-shaft mixing structure is mainly located in the central area of the mixing drum, providing insufficient coverage of the outer areas and easily creating mixing dead zones. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the problems existing in the prior art, this utility model provides a dual-shaft differential speed asphalt mixture high-efficiency mixing drum, which solves the technical problems mentioned in the background art where the asphalt mixture mixing drum uses a single-shaft mixing structure to mix asphalt mixtures, resulting in poor mixing fullness and efficiency, poor outer mixing coverage, and easy formation of mixing dead zones.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A dual-shaft differential high-efficiency asphalt mixture mixing drum includes a drum body, a top cover at the top of the drum body, a first rotating shaft mounted on the top cover via bearings, a first mixing structure mounted on the first rotating shaft, a second rotating shaft mounted inside the first rotating shaft via bearings, a second mixing structure mounted on the second rotating shaft, the first mixing structure located around the second mixing structure, a drive shaft mounted on the top cover via bearing seats, and a drive assembly mounted in cooperation with the drive shaft, a first drive gear and a second drive gear mounted on the drive shaft, a first driven gear mounted at the drive end of the first rotating shaft, the first driven gear meshing with the first drive gear, and a second driven gear mounted at the drive end of the second rotating shaft, the second driven gear meshing with the second drive gear;
[0009] Here, the speed ratios between the first driven gear and the first driving gear, and between the second driven gear and the second driving gear, can be selected as needed to create a speed difference between the first and second rotating shafts. In this way, the second stirring structure can be used as the main stirring structure, and the first stirring structure can be used as an auxiliary stirring structure for the second stirring structure, allowing them to rotate at different speeds around the periphery of the second stirring structure, thereby improving the stirring effect of the asphalt inside the cylinder. Preferably, the diameter of the first driving gear is smaller than the diameter of the first driven gear, and the diameter of the second driving gear is larger than the diameter of the second driven gear.
[0010] The present invention is further configured such that the first stirring structure includes a connecting rod, the connecting rod is symmetrically arranged on both sides of the first rotating shaft, a stirring rod is vertically arranged on the connecting rod, and a spiral stirring blade is arranged on the stirring rod. When the first rotating shaft drives the connecting rod to rotate, the connecting rod will drive the stirring rod to rotate, and the stirring rod can drive the spiral stirring blade to rotate, so that the spiral stirring blade can cooperate with the second stirring structure to realize the mixing and stirring of asphalt in the inner and outer space of the cylinder.
[0011] The present invention is further configured such that a first cutting blade is provided on the stirring rod in conjunction with the spiral stirring blade. The first cutting blade is located in the gap between the spiral stirring blade. When the stirring rod drives the spiral stirring blade to rotate around the second stirring structure, it can synchronously drive the rotation of the first cutting blade. The first cutting blade can cut the lumpy substances in the contacting asphalt material in a timely manner, thereby avoiding the precipitation of lumpy substances in the cylinder and the blockage of the pipe during discharge.
[0012] The present invention is further configured such that a plurality of fixed columns are provided on the outer side of the stirring rod, and a scraper is connected to the outer end of the fixed column. When the first rotating shaft carries the connecting rod and the stirring rod to rotate, the stirring rod will carry the scraper to rotate through the fixed column. The rotation of the scraper can scrape and clean the inside of the cylinder, reduce the adhesion residue of asphalt raw materials on the inner wall of the cylinder, and improve the uniformity of asphalt mixing in the cylinder.
[0013] The present invention is further configured such that the second stirring structure includes a stirring column, a first spiral blade is provided on the stirring column, a second spiral blade is provided on the outer side of the first spiral blade, and the second rotating shaft can control the stirring column to drive the first spiral blade and the second spiral blade to flip when rotating, thereby fully stirring the asphalt material in the central area inside the cylinder.
[0014] The present invention is further configured such that a plurality of second cutting blades are horizontally and evenly arranged on the second rotating shaft. The second cutting blades are located in the gap between the first spiral blade and the second spiral blade. When the second rotating shaft carries the stirring column, the first spiral blade and the second spiral blade to rotate, it can synchronously drive the second cutting blade to rotate. By setting the second cutting blade, the sediment and lumpy substances in the asphalt can be cut during the asphalt stirring process, reducing the retention of lumps and affecting the subsequent discharge.
[0015] The present invention is further configured such that the driving assembly includes a driving motor, the driving motor is mounted on the top cover, and a reversing reducer is provided for the transmission connection between the driving motor and the driving end of the driving shaft. The rotation of the driving shaft can be controlled by the cooperation of the driving motor and the reversing reducer.
[0016] The present invention is further configured such that a stirring impeller is provided at the bottom end of the second rotating shaft. The stirring impeller can enhance the stirring effect of the second rotating shaft on the asphalt material at the bottom of the cylinder. A protective cover is provided on the top cover in conjunction with the first driving gear, the first driven gear, the second driving gear, and the second driven gear. The protective cover can enhance the protection performance of the first driving gear, the first driven gear, the second driving gear, and the second driven gear.
[0017] (III) Beneficial Effects
[0018] Compared with the prior art, this utility model provides a dual-shaft differential speed asphalt mixture high-efficiency mixing drum, which has the following beneficial effects:
[0019] 1. This utility model significantly improves the mixing effect of asphalt mixtures through a dual-shaft differential speed design. The drive shaft drives the first and second rotating shafts to rotate at different speeds through the cooperation of the first drive gear and the first driven gear, and the cooperation of the second drive gear and the second driven gear, respectively, forming a speed difference between the inner and outer mixing structures. The second mixing structure, as the main mixing part, achieves strong convection shearing in the central area through the first and second helical blades, while the first mixing structure, as the auxiliary mixing part, revolves synchronously on the periphery through the helical mixing blades. The combined motion generated by the speed difference between the two effectively breaks up asphalt agglomeration and clumping, ensuring that the aggregate and asphalt are fully coated. In addition, the cooperation of the first and second cutting blades further crushes the agglomerated materials, avoiding sedimentation or blockage. Compared with the traditional single-shaft mixing in the prior art, this design solves the problems of uneven mixing and stratification, significantly improving the density and durability of the asphalt mixture, and enhancing the mixing effect and efficiency of the asphalt mixture.
[0020] 2. This utility model completely eliminates the mixing dead zone by the spatial complementarity of the inner and outer double mixing structures between the first mixing structure and the second mixing structure. When the scraper of the first mixing structure rotates with the shaft, it closely adheres to the inner wall of the cylinder and scrapes off the adhering asphalt in time, reducing the residue. At the same time, the spiral mixing blades cover the outer area and form convection with the first spiral blades and the second spiral blades in the center to ensure that the material is tumbled in the whole range. The tumbling impeller at the bottom of the second rotating shaft further strengthens the bottom mixing and prevents the material from sinking to the bottom.
[0021] 3. This utility model adopts a modular design with a single drive motor driving two shafts. Differential speed is achieved through gear transmission ratio adjustment. The structure is compact and energy consumption is low. The drive motor controls the drive shaft through a reversing reducer, driving two sets of gears to run synchronously, which simplifies the transmission chain and reduces the failure rate. The protective cover protects the gear set from dust corrosion and extends its service life. In addition, the stirring rod can also be designed as a self-rotating structure, which uses the material resistance to achieve self-rotation on the basis of revolution, further enhancing the shearing effect. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of the dual-shaft differential speed asphalt mixture high-efficiency mixing drum of this utility model;
[0023] Figure 2 This is a cross-sectional view of the overall structure of this utility model;
[0024] Figure 3 This is a schematic diagram of the cooperation structure between the first rotating shaft, the second rotating shaft, the first stirring structure, the second stirring structure, and the drive motor in this utility model.
[0025] Figure 4 This is a schematic diagram of the scraper installation structure in the second embodiment of the present invention;
[0026] Figure 5 This is a schematic diagram of the cooperation structure between the second rotating shaft, the first spiral blade, the second spiral blade, the second cutting blade, and the tumbling impeller in this utility model.
[0027] In the diagram: 1. Cylinder; 2. Top cover; 3. First rotating shaft; 4. Second rotating shaft; 5. Drive shaft; 6. First drive gear; 7. Second drive gear; 8. First driven gear; 9. Second driven gear; 10. Connecting rod; 11. Stirring rod; 12. Spiral stirring blade; 13. First cutting blade; 14. Fixed column; 15. Scraper; 16. Stirring column; 17. First spiral blade; 18. Second spiral blade; 19. Second cutting blade; 20. Drive motor; 21. Reversing reducer; 22. Tumbling impeller; 23. Protective cover. Detailed Implementation
[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0030] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.
[0031] Please see Figures 1-5 A dual-shaft differential speed asphalt mixture high-efficiency mixing drum includes a drum body 1, a top cover 2 at the top of the drum body 1, a first rotating shaft 3 mounted on the top cover 2 via bearings, a first mixing structure mounted on the first rotating shaft 3, a second rotating shaft 4 mounted inside the first rotating shaft 3 via bearings, a second mixing structure mounted on the second rotating shaft 4, the first mixing structure located around the second mixing structure, a drive shaft 5 mounted on the top cover 2 via bearing seats, and a drive assembly mounted in cooperation with the drive shaft 5, a first drive gear 6 and a second drive gear 7 mounted on the drive shaft 5, a first driven gear 8 mounted at the drive end of the first rotating shaft 3, the first driven gear 8 meshing with the first drive gear 6, and a second driven gear 9 mounted at the drive end of the second rotating shaft 4, the second driven gear 9 meshing with the second drive gear 7;
[0032] Here, the speed ratios between the first driven gear 8 and the first driving gear 6, and between the second driven gear 9 and the second driving gear 7, can be selected as needed to create a speed difference between the first rotating shaft 3 and the second rotating shaft 4. In this way, the second mixing structure can be used as the main mixing structure, and the first mixing structure can be used as an auxiliary mixing structure for the second mixing structure. This allows them to revolve around the second mixing structure at different speeds. While strengthening the mixing force of the asphalt mixture on the periphery, internal and external convection shear can be formed between the first and second mixing structures, thereby improving the mixing effect of the asphalt inside the cylinder 1. Preferably, the diameter of the first driving gear 6 is smaller than the diameter of the first driven gear 8, and the diameter of the second driving gear 7 is larger than the diameter of the second driven gear 9.
[0033] Please see Figures 1-5 As one embodiment of the first mixing structure: the first mixing structure includes a connecting rod 10, which is symmetrically arranged on both sides of the first rotating shaft 3. A mixing rod 11 is vertically arranged on the connecting rod 10, and a spiral mixing blade 12 is arranged on the mixing rod 11. When the first rotating shaft 3 drives the connecting rod 10 to rotate, the connecting rod 10 will drive the mixing rod 11 to rotate. The mixing rod 11 can drive the spiral mixing blade 12 to rotate, so that the spiral mixing blade 12 can cooperate with the second mixing structure to realize the mixing and stirring of asphalt in the internal and external space of the cylinder 1.
[0034] Furthermore, this utility model provides a first cutting blade 13 on the stirring rod 11 in conjunction with the spiral stirring blade 12. The first cutting blade 13 is located in the gap of the spiral stirring blade 12. During the process of the stirring rod 11 driving the spiral stirring blade 12 to rotate around the second stirring structure, the first cutting blade 13 can be driven to rotate synchronously. The first cutting blade 13 can cut the lumpy substances in the contacting asphalt material in a timely manner, thereby avoiding the precipitation of lumpy substances in the cylinder 1 and the blockage of the pipe during discharge.
[0035] This invention provides multiple fixed posts 14 on the outside of the mixing rod 11. A scraper 15 is connected to the outer end of the fixed post 14. When the first rotating shaft 3 rotates with the connecting rod 10 and the mixing rod 11, the mixing rod 11 will rotate with the scraper 15 through the fixed post 14. The rotation of the scraper 15 can scrape and clean the inside of the cylinder 1, reduce the adhesion residue of asphalt raw materials on the inner wall of the cylinder 1, and improve the uniformity of asphalt mixing in the cylinder 1.
[0036] Please see Figures 1-5As one embodiment of the second mixing structure: the second mixing structure includes a mixing column 16, a first spiral blade 17 is provided on the mixing column 16, and a second spiral blade 18 is provided on the outer side of the first spiral blade 17. When the second rotating shaft 4 rotates, it can control the mixing column 16 to drive the first spiral blade 17 and the second spiral blade 18 to rotate, thereby fully mixing the asphalt material in the central area inside the cylinder 1.
[0037] Furthermore, this utility model has a plurality of second cutting blades 19 evenly and horizontally arranged on the second rotating shaft 4. The second cutting blades 19 are located in the gap between the first spiral blade 17 and the second spiral blade 18. When the second rotating shaft 4 rotates carrying the stirring column 16, the first spiral blade 17 and the second spiral blade 18, it can synchronously drive the second cutting blades 19 to rotate. By setting the second cutting blades 19, the sediment and lumps in the asphalt can be cut during the asphalt mixing process, reducing the retention of lumps and affecting the later discharge.
[0038] Please see Figures 1-5 As one implementation of the drive assembly: the drive assembly includes a drive motor 20, which is mounted on the top cover 2. A reversing reducer 21 is provided between the drive motor 20 and the drive end of the drive shaft 5. The rotation of the drive shaft 5 can be controlled by the cooperation between the drive motor 20 and the reversing reducer 21.
[0039] Please see Figures 1-5 As one embodiment of the second rotating shaft 4: a stirring impeller 22 is provided at the bottom end of the second rotating shaft 4. The stirring impeller 22 can enhance the stirring effect of the second rotating shaft 4 on the asphalt material at the bottom of the cylinder 1. A protective cover 23 is provided on the top cover 2 in conjunction with the first driving gear 6, the first driven gear 8, the second driving gear 7 and the second driven gear 9. The protective cover 23 can enhance the protection performance of the first driving gear 6, the first driven gear 8, the second driving gear 7 and the second driven gear 9.
[0040] In summary:
[0041] In use, the rotation of the drive shaft 5 can be controlled by the cooperation of the drive motor 20 and the reversing reducer 21. The rotation of the drive shaft 5 can control the rotation of the first drive gear 6 and the second drive gear 7. The rotation of the first shaft 3 can be controlled by the cooperation of the first drive gear 6 and the first driven gear 8. The rotation of the second shaft 4 can be controlled by the cooperation of the second drive gear 7 and the second driven gear 9.
[0042] In this way, by setting different transmission ratios between gears, a set of drive motors 20 can be used to synchronously control the first rotating shaft 3 and the second rotating shaft 4 to rotate at different speeds, thereby controlling the first mixing structure to rotate relative to the outside of the second mixing structure, realizing differential mixing of asphalt in the cylinder 1. In this way, the first rotating shaft 3 and the second rotating shaft 4 rotate at different speeds, forming a composite motion of shearing, convection, diffusion and circumferential tumbling, which can quickly break up asphalt agglomeration and clumping, and ensure that the asphalt is evenly coated with the aggregate during mixing.
[0043] During the above process, the second rotating shaft 4 will carry the stirring column 16, the first spiral blade 17, the second spiral blade 18, the second cutting blade 19, and the tumbling impeller 22 to rotate.
[0044] The first helical blade 17 and the second helical blade 18 are stably installed on the second rotating shaft 4 through the stirring column 16 and rotate with the second rotating shaft 4 to achieve uniform convection shearing tumbling in the central area inside the cylinder 1, and fully and quickly achieve the stirring of asphalt in the central area inside the cylinder 1.
[0045] At the same time, during the above-mentioned stirring process, the second cutting blade 19 will also rotate to cut and crush the lumpy material in the asphalt, thereby improving the stirring effect of the asphalt in the cylinder 1.
[0046] Meanwhile, the bottom stirring blades can enhance the stirring at the bottom of the cylinder 1, serving as an auxiliary measure to the first spiral blade 17 and the second spiral blade 18, further reducing the occurrence of asphalt mixture settling to the bottom and improving the mixing uniformity of the asphalt mixture.
[0047] During the above process, the drive shaft 5 will synchronously drive the first rotating shaft 3 to rotate through the cooperation of the first drive gear 6 and the first driven gear 8. The first rotating shaft 3 will carry the connecting rod 10 and the stirring rod 11 to rotate along the axis inside the cylinder 1.
[0048] When the stirring rod 11 rotates, it will simultaneously carry the spiral stirring blade 12, the first cutting blade 13, the fixed column 14 and the scraper 15 to rotate. During this process, the spiral stirring blade 12 will revolve along the second rotating shaft 4, which can effectively make up for the insufficient stirring of the inner and outer parts of the cylinder 1 by the second stirring structure.
[0049] Furthermore, there is a speed difference between the rotation of the spiral mixing blade 12 and the rotation of the first spiral blade 17 and the second spiral blade 18, which can further improve the convective shear mixing effect of asphalt between the inner and outer regions, and further realize the rapid and thorough mixing of asphalt in the mixing drum.
[0050] The first cutting blade 13 can be used as an auxiliary to the second cutting blade 19 to further enhance the cutting effect on the lumpy material inside the asphalt.
[0051] As a second embodiment of this utility model:
[0052] Unlike the first embodiment described above, where the stirring rod 11 is fixedly mounted on the connecting rod 10, in this embodiment, the tail end of the connecting rod 10 can be extended vertically downwards, and the stirring rod 11 can be rotatably mounted on the connecting rod 10 via a bearing structure. In this way, when the connecting rod 10 carries the stirring rod 11 to control the spiral stirring blade 12 to revolve relative to the second stirring structure, the spiral stirring blade 12 and the first cutting blade 13 can rotate relative to themselves under the action of the asphalt stirring resistance. This can further improve the stirring effect of asphalt in the cylinder 1.
[0053] In this structure, the fixing post 14 for fixing the scraper 15 needs to be set on the connecting rod 10 to ensure the rotation effect of the stirring rod 11 carrying the spiral stirring blade 12 and the first cutting blade 13, while ensuring the scraping effect of the scraper 15 on the inner wall of the cylinder 1.
[0054] In this utility model, all bearing structures that may come into contact with asphalt are sealed using existing mechanical seal structures. The mechanical seals used by the bearings during use are known existing technologies, and the production of sealed bearings and other products is based on existing mature technologies and is available on the market. Those skilled in the art should know this, and this utility model will not be described in detail here.
[0055] In all the solutions mentioned above, the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.
[0056] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here.
[0057] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and this utility model will not elaborate on them.
[0058] If any of the technical solutions mentioned above involve a synchronous belt drive structure, and there is no clearly defined structure, they are all existing technologies involving the combination of synchronous belt and synchronous pulley. The connection between the synchronous belt and the shaft structure is a known technology and will not be elaborated upon in this utility model.
Claims
1. A dual-shaft differential speed asphalt mixture high-efficiency mixing drum, comprising a drum body (1), wherein a top cover (2) is provided at the top of the drum body (1), and a first rotating shaft (3) is provided on the top cover (2) via a bearing, and a first mixing structure is provided on the first rotating shaft (3), characterized in that: The first rotating shaft (3) has a second rotating shaft (4) inside it via a bearing. The second rotating shaft (4) has a second stirring structure. The first stirring structure is located on the periphery of the second stirring structure. The top cover (2) has a drive shaft (5) via a bearing seat. A drive assembly is provided in cooperation with the drive shaft (5). The drive shaft (5) has a first drive gear (6) and a second drive gear (7). The drive end of the first rotating shaft (3) has a first driven gear (8) that meshes with the first drive gear (6). The drive end of the second rotating shaft (4) has a second driven gear (9) that meshes with the second drive gear (7).
2. The dual-shaft differential speed asphalt mixture high-efficiency mixing drum according to claim 1, characterized in that: The first stirring structure includes a connecting rod (10), which is symmetrically arranged on both sides of the first rotating shaft (3). A stirring rod (11) is vertically arranged on the connecting rod (10), and a spiral stirring blade (12) is arranged on the stirring rod (11).
3. The dual-shaft differential speed asphalt mixture high-efficiency mixing drum according to claim 2, characterized in that: The stirring rod (11) is equipped with a first cutting blade (13) that works in conjunction with the spiral stirring blade (12). The first cutting blade (13) is located in the gap between the spiral stirring blade (12).
4. The dual-shaft differential speed high-efficiency asphalt mixture mixing drum according to claim 3, characterized in that: Multiple fixed posts (14) are provided on the outer side of the stirring rod (11). A scraper (15) is connected to the outer end of the fixed post (14). The outer end of the scraper (15) slides against the inner wall of the cylinder (1), and the inner end is connected to the stirring rod (11) or the connecting rod (10) through the fixed post (14).
5. The dual-shaft differential speed asphalt mixture high-efficiency mixing drum according to claim 1, characterized in that: The second stirring structure includes a stirring column (16), on which a first spiral blade (17) is provided, and a second spiral blade (18) is provided on the outer side of the first spiral blade (17) in opposite directions.
6. The dual-shaft differential speed high-efficiency asphalt mixture mixing drum according to claim 5, characterized in that: Multiple second cutting blades (19) are horizontally and evenly arranged on the second rotating shaft (4). The second cutting blades (19) are located in the gap between the first spiral blade (17) and the second spiral blade (18).
7. The dual-shaft differential speed high-efficiency asphalt mixture mixing drum according to claim 1, characterized in that: The drive assembly includes a drive motor (20), which is mounted on the top cover (2). A reversing reducer (21) is provided between the drive motor (20) and the drive end of the drive shaft (5).
8. The dual-shaft differential speed asphalt mixture high-efficiency mixing drum according to claim 1, characterized in that: The bottom end of the second rotating shaft (4) is provided with a stirring impeller (22).
9. The dual-shaft differential speed asphalt mixture high-efficiency mixing drum according to claim 1, characterized in that: The top cover (2) is provided with a protective cover (23) that cooperates with the first drive gear (6), the first driven gear (8), the second drive gear (7) and the second driven gear (9).