Belt conveyor directly connected with external speed reducer

Abstract

The utility model relates to a kind of belt conveyor of external speed reducer direct connection electric roller, including rack, speed reducer, electric roller and conveying belt, the end of speed reducer output and electric roller is connected, drives electric roller rotation, provides power for conveying belt;Speed reducer outside front is equipped with positioning part, rack side is fixed with first side plate, first side plate is provided with first positioning hole, it is passed through for speed reducer outside front, and cooperate with positioning part by plane clearance;First side plate outside is equipped with sub-plate, second positioning hole corresponding with first positioning hole is equipped on it, second positioning hole is passed through for speed reducer outside, and cooperate with positioning part by plane clearance, connect with locking piece by locking piece simultaneously with locking block, to lock and fix speed reducer with rack;The cooperation clearance of second positioning hole and positioning part is less than the cooperation clearance of first positioning hole.The utility model improves the convenience and positioning accuracy of roller disassembly, guarantees that belt conveyor is stably operated.

Description

Technical Field

[0001] This utility model relates to the field of roller-driven belt conveyor technology, and in particular to a belt conveyor with an external reducer directly connected to an electric roller. Background Technology

[0002] In existing technologies, belt conveyors driven by externally mounted electric rollers typically require a synchronous belt or chain connection between the reducer and the electric roller due to structural design limitations. This non-direct connection requires significant installation space, is complex, and cumbersome to assemble and disassemble. While some belt conveyors offer a direct connection between the reducer and electric roller, this requires an additional axial positioning device for installation, as it involves a shaft hole fit with the frame. Furthermore, it prevents seamless integration of the reducer and electric roller, resulting in inconvenient and inefficient assembly and disassembly. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a belt conveyor with an external reducer directly connected to an electric roller, aiming to improve the convenience of roller assembly and disassembly and positioning accuracy, and ensure stable operation of the belt conveyor.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A belt conveyor with an external speed reducer directly connected to an electric roller includes a frame, a speed reducer, an electric roller, and a conveyor belt. The output end of the speed reducer is connected to the end of the electric roller, driving the electric roller to rotate and providing power to the conveyor belt.

[0006] The reducer has a positioning part at the front of the outer side, and a first side plate is fixed on one side of the frame. A first positioning hole is provided on the first side plate, which allows the front of the reducer to pass through and is fitted with the positioning part through a planar clearance.

[0007] The outer side of the first side plate is provided with a sub-plate, which has a second positioning hole corresponding to the first positioning hole. The second positioning hole allows the outer side of the reducer to pass through and is fitted with the positioning part through a planar clearance. At the same time, it is connected to the locking block through a locking member, thereby locking and fixing the reducer to the frame.

[0008] The clearance between the second positioning hole and the positioning part is smaller than the clearance between the first positioning hole.

[0009] As a further improvement to the above technical solution:

[0010] The structure of the electric drum includes an outer tube with a central fixed shaft coaxially arranged inside it. The outer tube has a first front end cover and a first rear end cover at both ends. The first front end cover and the first rear end cover are respectively engaged with the central fixed shaft through bearing components.

[0011] The first front end cover serves as the end of the electric roller and is connected to the output end of the reducer;

[0012] One end of the central fixed shaft extends out of the first rear end cover and is connected to the second side plate fixed on the other side of the frame via a fixing plate.

[0013] The structure of the electric drum includes an outer tube with a central rotating shaft coaxially arranged inside it. The two ends of the outer tube are respectively provided with a second front end cover and a second rear end cover, and the second front end cover and the second rear end cover are respectively fixedly connected to the central rotating shaft.

[0014] The second front end cover serves as the end of the electric roller and is connected to the output end of the reducer;

[0015] One end of the central rotating shaft extends out of the second rear end cover and cooperates with the planar bearing, which is located on the second side plate on the other side of the frame.

[0016] The other end of the central rotating shaft and the second front end cover are simultaneously connected to the output end of the reducer.

[0017] The first positioning hole is a square hole with an opening on one side, and its three side walls are respectively used to fit with the positioning part through a planar clearance.

[0018] The first positioning hole has a first clearance portion at its edge to accommodate the locking block.

[0019] The second positioning hole is a square hole with an opening on one side, and its three side walls are respectively used to cooperate with the positioning part through a planar clearance; the edge of the second positioning hole is provided with a second clearance part that cooperates with the locking block.

[0020] The reducer includes a housing, a front cover at the front of the housing, and a plurality of positioning grooves evenly distributed along the circumference on the front cover, the plurality of positioning grooves constituting the positioning part.

[0021] The reducer includes a motor part and a reduction part. The output end of the reducer includes a reduction output shaft, which is eccentrically arranged with respect to the motor output shaft of the motor part. The end of the reduction output shaft body is provided with a connecting plate, which extends out of the front cover and is connected to the end of the electric roller.

[0022] The sub-plate is fitted onto the front side of the housing and the two are integrally formed. A circular positioning plate is provided on the front side of the sub-plate, and the first positioning hole is a circular hole that engages with the circular positioning plate.

[0023] It also includes a guide shaft, a first driven shaft, and a second driven shaft. After the conveyor belt passes around the electric drum, it returns to the electric drum in sequence via the guide shaft, the first driven shaft, and the second driven shaft to form a loop.

[0024] The first driven shaft and the second driven shaft are arranged at opposite ends of the upper part of the belt conveyor at the same height. The electric drum is close to the second driven shaft. The guide shaft is located between the second driven shaft and the electric drum in both the height direction and the conveying direction.

[0025] The conveyor belt is tensioned by a tensioning device at the ends of a guide shaft, a first driven shaft, and a second driven shaft.

[0026] The technical solution of this utility model can achieve at least some of the following beneficial effects:

[0027] This invention utilizes the positioning part on the reducer housing to achieve planar fit with the side plate and auxiliary plate of the frame, realizing circumferential positioning and axial locking, improving positioning accuracy and the stability of the connection structure, and meeting the requirements for stable operation of the belt conveyor. The reducer and electric drum are directly connected as one unit, facilitating disassembly and assembly, and greatly improving disassembly and assembly efficiency.

[0028] This invention is applicable to both fixed and rotating rollers with a central shaft, and has a wide range of applications and high flexibility in assembly and disassembly.

[0029] This utility model's speed reducer uses a support cover to assemble the motor and gear reduction mechanism into a module within the housing. By eccentrically positioning the reduction output shaft of the gear reduction mechanism relative to the motor output shaft, the compactness of the module structure is enhanced, the axial dimension is reduced, and a flattened design of the speed reducer is achieved. This avoids alignment deviations, effectively reduces vibration and noise, and improves overall operational stability.

[0030] This utility model's electric roller adopts an external modular reducer, enabling modular assembly and disassembly. Its eccentric structure facilitates easy assembly and disassembly, improving assembly efficiency. Furthermore, it reduces the temperature rise within the roller body, contributing to enhanced operational reliability and service life.

[0031] Other features and advantages of this invention will be set forth in the following description or may be learned by practicing this invention. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of a belt conveyor in the form of an electric roller, according to an embodiment of the present invention.

[0033] Figure 2 This is an exploded structural diagram of the first side plate and the sub-plate in one embodiment of the present utility model.

[0034] Figure 3 for Figure 1 The main view.

[0035] Figure 4 for Figure 3 Schematic diagram of section AA.

[0036] Figure 5 This is a cross-sectional view of a belt conveyor in another form of electric roller according to an embodiment of this utility model.

[0037] Figure 6 This is a three-dimensional structural diagram of a speed reducer according to one embodiment of the present invention.

[0038] Figure 7 This is a top view of a belt conveyor under belt tensioning conditions according to an embodiment of the present invention.

[0039] Figure 8 for Figure 7 Schematic diagram of the BB section.

[0040] Figure 9 This is a schematic diagram of the structure of the first side plate in another embodiment of the present utility model.

[0041] Figure 10 This is a schematic diagram of the reducer in another embodiment of the present invention.

[0042] Figure 11 This is a cross-sectional view of the speed reducer according to an embodiment of the present utility model.

[0043] Explanation of reference numerals in the attached drawings: 1. Conveyor belt; 2. Second driven shaft; 3. Guide shaft; 4. First side plate; 5. Sub-plate; 6. Reducer; 7. First front end cover; 8. Central fixed shaft; 9. Outer tube; 10. First rear end cover; 11. Second side plate; 12. Fixed plate; 13. Surface bearing; 14. Central rotating shaft; 15. Second front end cover; 16. Frame; 17. Second rear end cover; 18. Locking block; 19. First driven shaft; 41. First positioning hole; 42. First clearance part; 51. Second positioning hole;

[0044] 601. Housing; 602. Rear cover; 603. Reduction output shaft; 604. Stator assembly; 605. Magnet; 606. Motor output shaft; 607. Rotor; 609. Support cover; 612. First-stage output gear; 613. First-stage gear shaft; 614. Second-stage input gear; 615. Second-stage output gear; 616. Third-stage input gear; 617. Front cover; 618. Final-stage output gear; 631. Connecting plate; 661. Input gear; 6171. Positioning groove; 51. Circular positioning plate. Detailed Implementation

[0045] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0046] See Figures 1 to 4As shown, the belt conveyor with an external reducer directly connected to an electric drum in this embodiment includes a frame 16, a reducer 6, an electric drum, and a conveyor belt 1. The output end of the reducer 6 is connected to the end of the electric drum, driving the electric drum to rotate and providing power to the conveyor belt 1.

[0047] A positioning part is provided on the front outer side of the reducer 6, and a first side plate 4 is fixed on one side of the frame 16. A first positioning hole 41 is provided on the first side plate 4, which allows the front outer side of the reducer 6 to pass through and is fitted with the positioning part through a planar clearance.

[0048] As a specific method, a sub-plate 5 is provided on the outer side of the first side plate 4, and a second positioning hole 51 corresponding to the first positioning hole 41 is provided on it. The second positioning hole 51 allows the outer side of the reducer 6 to pass through and is fitted with the positioning part through a planar clearance. At the same time, it is connected to the locking block 18 through a locking member, thereby locking and fixing the reducer 6 to the frame 16.

[0049] The clearance between the second positioning hole 51 and the positioning part is smaller than the clearance between the first positioning hole 41. The main purpose is to first use the first positioning hole 41 on the first side plate 4 to perform rough positioning of the reducer 6 as a whole, and prevent circumferential rotation through planar fit. Then, the second positioning hole 51 on the auxiliary plate 5 is used to perform more precise positioning of the reducer 6 as a whole, and achieve locking and fixation.

[0050] As a preferred embodiment, the first positioning hole 41 is a square hole with an opening on one side, and its three side walls are respectively used to engage with the positioning part through a planar clearance. Preferably, the edge of the first positioning hole 41 is provided with a first clearance portion 42 for accommodating the locking block 18.

[0051] As a preferred embodiment, the second positioning hole 51 is a square hole with an opening on one side, and its three side walls are respectively used to cooperate with the positioning part through a planar clearance; the edge of the second positioning hole 51 is preferably provided with a second clearance part that cooperates with the locking block 18.

[0052] As a preferred embodiment, the first side plate 4 and the sub-plate 5 are connected by bolts.

[0053] As a specific method, such as Figure 4 As shown, the structure of the electric drum includes an outer tube 9, inside which a central fixed shaft 8 is coaxially arranged. The outer tube 9 has a first front end cover 7 and a first rear end cover 10 at both ends. The first front end cover 7 and the first rear end cover 10 are respectively engaged with the central fixed shaft 8 through bearing components. The first front end cover 7 serves as the end of the electric drum and is connected to the output end of the reducer 6. One end of the central fixed shaft 8 extends out of the first rear end cover 10 and is connected to the second side plate 11 fixed on the other side of the frame 16 through a fixing plate 12.

[0054] In this implementation, the first front end cover 7 and the first rear end cover 10 are connected to the outer tube 9 to form the rotating part of the electric drum. A conveyor belt 1 is installed outside the outer tube 9 for outputting the rolling action. The central fixed shaft 8 serves as the fixed part of the electric drum, cooperating with the rotating part through the bearing components to provide support. The central fixed shaft 8 is fixedly installed, requiring high sealing; therefore, a mechanical seal is applied at the mating point according to the actual situation to ensure stable operation of the rotating part.

[0055] As a specific method, such as Figure 5 As shown, the structure of the electric drum includes an outer tube 9, inside which a central rotating shaft 14 is coaxially arranged. The two ends of the outer tube 9 are respectively provided with a second front end cover 15 and a second rear end cover 17. The second front end cover 15 and the second rear end cover 17 are respectively fixedly connected to the central rotating shaft 14. The second front end cover 15 is used as the end of the electric drum and is connected to the output end of the reducer 6. One end of the central rotating shaft 14 extends out of the second rear end cover 17 and cooperates with a plane bearing 13. The plane bearing 13 is arranged on the second side plate 11 on the other side of the frame 16.

[0056] In this embodiment, the second front end cover 15 and the second rear end cover 17 are connected to the outer tube 9, and simultaneously, the second front end cover 15 and the second rear end cover 17 are fixedly connected to the central rotating shaft 14, forming the rotating part of the electric drum. A conveyor belt 1 is provided outside the outer tube 9 for output rolling. The central rotating shaft 14, as the rotating part of the electric drum, cooperates with the plane bearing on the frame, providing support and coordinating rotation. Since the central rotating shaft 14 is in a rotating state, the sealing requirements are lower compared to the previous embodiment.

[0057] See Figure 6 As a specific method, the structure of the reducer 6 includes a housing 601, a front cover 617 is provided at the front of the housing 601, and a number of positioning grooves 6171 are evenly distributed along the circumferential direction on the front cover 617. The number of positioning grooves 6171 constitutes a positioning part.

[0058] Regardless of whether the electric drum has a fixed or rotating central shaft, the installation structure is the same as that of the reducer and frame. The installation method includes: connecting the reducer and the electric drum into an integral module, positioning the reducer through the first side plate, then fixing the other end of the central rotating shaft 14 or the central fixed shaft 8, and then locking the reducer using the auxiliary plate. Specifically, for an electric drum with a central rotating shaft 14, after assembling its end with the plane bearing 13, starting the electric drum to run for a period of time, adjusting the plane bearing 13 by its own applicable angle to align the electric drum axially with the plane bearing 13, and then locking the auxiliary plate using the locking block, thus completing the high-precision installation.

[0059] As a preferred embodiment, the other end of the central rotating shaft 14 and the second front end cover 15 are simultaneously connected to the output end of the reducer 6.

[0060] See Figure 9 and Figure 10 In one specific manner, the sub-plate 5 is integrally formed with the housing 601 of the reducer 6. A circular positioning disc 51 is provided on the front side of the sub-plate 5. Correspondingly, the first positioning hole 41 on the first side plate 4 is a circular hole that fits into the positioning protrusion 651. This installation structure essentially... Figure 2 The independently designed sub-plate 5 is directly integrated onto the housing 601. During installation, the circular positioning plate 51 is inserted into the circular first positioning hole 41 and then locked in place using the locking mechanism.

[0061] As a specific form, see Figure 7 and Figure 8 The belt conveyor structure of this embodiment also includes a guide shaft 3, a first driven shaft 19, and a second driven shaft 2. After the conveyor belt 1 passes around the electric drum, it returns to the electric drum in sequence via the guide shaft 3, the first driven shaft 19, and the second driven shaft 2 to form a loop. The first driven shaft 19 and the second driven shaft 2 are arranged at opposite ends of the upper part of the belt conveyor at the same height. The electric drum is close to the second driven shaft 2. The guide shaft 3 is located between the second driven shaft 2 and the electric drum in both the height direction and the conveying direction. The conveyor belt 1 is tensioned by the shaft end tensioning devices of the guide shaft 3, the first driven shaft 19, and the second driven shaft 2.

[0062] In this configuration, the electric roller can be installed while under tension. After releasing the tensioning device, the entire module consisting of the reducer and electric roller can be detached by removing the sub-plate.

[0063] For a specific implementation method, see Figure 6 and Figure 11 The reducer 6 includes a motor section and a reduction section. The output end of the reducer 6 includes a reduction output shaft 603, which is eccentrically positioned with respect to the motor output shaft 606 of the motor section. Preferably, the end of the reduction output shaft 603 is provided with a connecting disc 631, which extends out of the front cover 617 and connects to the end of the electric drum. Figure 10 As shown, the preferred structure of the reducer 6 is:

[0064] Includes a housing 601, with a front cover 617 and a rear cover 602 at its two ends respectively. Inside the housing 601, there is a support cover 609, which divides the space inside the housing 601 into two axially distributed areas for respectively accommodating a motor and a gear reduction mechanism.

[0065] The motor output shaft 606 of the motor part is coaxially arranged with the housing 601, and the two ends of the motor output shaft 606 are connected to the rear cover 2 and the support cover 9 respectively through bearing components;

[0066] The input gear 661 of the gear reduction mechanism is coaxial with the motor output shaft 606 and is integrally set. The support cover 609 is provided with a central hole for the input gear 61 to pass through.

[0067] The final output gear 618 of the gear reduction mechanism is sleeved on the reduction output shaft 3. The two ends of the reduction output shaft 3 are connected to the support cover 9 and the front cover 17 respectively through bearing components.

[0068] The reduction output shaft 603 and the motor output shaft 606 are eccentrically set.

[0069] Alternatively, the reduction output shaft 603 body and the connecting plate 631 can be integrated as one unit, or they can be separate units connected by fasteners.

[0070] In this embodiment, the motor and gear reduction mechanism are assembled into a module within the housing using a support cover. By eccentrically positioning the reduction output shaft of the gear reduction mechanism relative to the motor output shaft, the module's internal structure is made compact, and its axial dimensions are reduced. Furthermore, connecting both ends of the reduction output shaft to the support cover and front cover via bearings enhances load-bearing capacity and achieves a flattened design for the reducer. This avoids alignment deviations and improves assembly efficiency and operational stability.

[0071] As a preferred embodiment, the support cover 609 and the housing 601 are assembled by a heat fitting process, or the support cover 609 and the housing 601 are integrally formed by casting.

[0072] The support cover 609 is fixedly connected to the front cover 617. Preferably, the support cover 609 is fixedly connected to the front cover 617 (along the axial direction) by a locating pin. Specifically, the support cover 609 or the front cover 617 is provided with a locating post, which has a locating hole for installing the locating pin. The locating post can be cylindrical or square.

[0073] As a preferred embodiment, the support cover 609 has an oil seal cavity on one side of the bearing chamber for mounting the bearing component that mates with the motor output shaft 606, which is used to mount the oil seal that mates with the motor output shaft 606.

[0074] The end of the reduction output shaft 603 near the rear cover 602 is tapered to reduce its size.

[0075] As a preferred embodiment, the gear reduction mechanism is a two-stage or three-stage double-gear reduction mechanism, and the specific structure of the three-stage double-gear reduction mechanism is as follows:

[0076] It includes a first-stage gear shaft 13 and a second-stage gear shaft. The first-stage gear shaft 13 is equipped with a first-stage output gear 12 and a second-stage input gear 14. The second-stage gear shaft is equipped with a second-stage output gear 15 and a third-stage input gear 16.

[0077] The first-stage output gear 12 meshes with the input gear 61, the second-stage input gear 14 meshes with the second-stage output gear 15, and the third-stage input gear 16 meshes with the final-stage output gear 18.

[0078] One end of the first-stage gear shaft 13 and the second-stage gear shaft are connected to the support cover 9 via bearing components, and the other end is connected to the front cover 17 via bearing components.

[0079] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A belt conveyor with an external reducer directly connected to an electric roller, comprising a frame (16), a reducer (6), an electric roller, and a conveyor belt (1), characterized in that, The output end of the reducer (6) is connected to the end of the electric drum, driving the electric drum to rotate and providing power to the conveyor belt (1); The reducer (6) has a positioning part on the front of its outer side, and a first side plate (4) is fixed on one side of the frame (16). A first positioning hole (41) is provided on the first side plate (4) for the front of the reducer (6) to pass through, and it is fitted with the positioning part through a planar clearance. The first side plate (4) has a sub-plate (5) on its outer side, and a second positioning hole (51) corresponding to the first positioning hole (41) is provided on it. The second positioning hole (51) allows the outer side of the reducer (6) to pass through and is fitted with the positioning part through a planar clearance. At the same time, it is connected to the locking block (18) through a locking member, thereby locking and fixing the reducer (6) to the frame (16). The clearance between the second positioning hole (51) and the positioning part is smaller than the clearance between the first positioning hole (41).

2. The belt conveyor with an external reducer directly connected to an electric roller as described in claim 1, characterized in that, The structure of the electric drum includes an outer tube (9), inside which a central fixed shaft (8) is coaxially provided. The two ends of the outer tube (9) are respectively provided with a first front end cover (7) and a first rear end cover (10). The first front end cover (7) and the first rear end cover (10) are respectively engaged with the central fixed shaft (8) through bearing components. The first front end cover (7) serves as the end of the electric roller and is connected to the output end of the reducer (6); One end of the central fixed shaft (8) extends out of the first rear end cover (10) and is connected to the second side plate (11) fixed on the other side of the frame (16) via a fixing plate (12).

3. The belt conveyor with an external reducer directly connected to an electric roller as described in claim 1, characterized in that, The structure of the electric drum includes an outer tube (9), inside which a central rotating shaft (14) is coaxially provided. The two ends of the outer tube (9) are respectively provided with a second front end cover (15) and a second rear end cover (17). The second front end cover (15) and the second rear end cover (17) are respectively fixedly connected to the central rotating shaft (14). The second front end cover (15) serves as the end of the electric roller and is connected to the output end of the reducer (6); One end of the central rotating shaft (14) extends out of the second rear end cover (17) and cooperates with the plane bearing (13), which is located on the second side plate (11) on the other side of the frame (16).

4. The belt conveyor with an external reducer directly connected to an electric roller as described in claim 3, characterized in that, The other end of the central rotating shaft (14) and the second front end cover (15) are simultaneously connected to the output end of the reducer (6).

5. The belt conveyor with an external reducer directly connected to an electric roller as described in claim 1, characterized in that, The first positioning hole (41) is a square hole with an opening on one side, and its three side walls are respectively used to cooperate with the positioning part through a planar clearance. The first positioning hole (41) has a first clearance portion (42) at its edge to accommodate the locking block (18).

6. The belt conveyor with an external reducer directly connected to an electric roller according to claim 1, characterized in that, The second positioning hole (51) is a square hole with an opening on one side, and its three side walls are respectively used to cooperate with the positioning part through a planar clearance; the edge of the second positioning hole (51) is provided with a second clearance part that cooperates with the locking block (18).

7. The belt conveyor with an external reducer directly connected to an electric roller according to claim 1, characterized in that, The structure of the reducer (6) includes a housing (601), and a front cover (617) is provided at the front of the housing (601). The front cover (617) is provided with a plurality of positioning grooves (6171) evenly distributed along the circumferential direction, and the plurality of positioning grooves (6171) constitute the positioning part.

8. The belt conveyor with an external reducer directly connected to an electric roller according to claim 7, characterized in that, The reducer (6) includes a motor part and a reduction part. The output end of the reducer (6) includes a reduction output shaft (603), which is eccentrically arranged with the motor output shaft (606) of the motor part. The end of the body of the reduction output shaft (603) is provided with a connecting plate (631), which extends out of the front cover (617) and is connected to the end of the electric roller.

9. The belt conveyor with an external reducer directly connected to an electric roller according to claim 7, characterized in that, The sub-plate (5) is fitted onto the front side of the housing (601) and the two are integrally formed. A circular positioning plate (651) is provided on the front side of the sub-plate (5), and the first positioning hole (41) is a circular hole that engages with the circular positioning plate (651).

10. The belt conveyor with an external reducer directly connected to an electric roller according to claim 1, characterized in that, It also includes a guide shaft (3), a first driven shaft (19) and a second driven shaft (2). After the conveyor belt (1) passes around the electric drum, it returns to the electric drum in sequence via the guide shaft (3), the first driven shaft (19) and the second driven shaft (2) to form a loop. The first driven shaft (19) and the second driven shaft (2) are arranged at opposite ends of the upper part of the belt conveyor at the same height. The electric drum is close to the second driven shaft (2). The guide shaft (3) is located between the second driven shaft (2) and the electric drum in both the height direction and the conveying direction. The conveyor belt (1) is tensioned by the shaft end tensioning devices of the guide shaft (3), the first driven shaft (19), and the second driven shaft (2).

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