Electric roller and conveying equipment

Abstract

The utility model relates to the technical field of electric driving equipment, discloses an electric roller and conveying equipment, and aims to reduce the space cost of the electric roller and improve the safety and the reliability. The motorized drum includes: a drum; the driving mechanism is arranged in the roller; the driving mechanism comprises a planetary gear disc assembly and a gear motor, the planetary gear disc assembly comprises a planetary gear disc and a plurality of planetary gears, the planetary gear disc is fixedly connected with a shell of the gear motor, the planetary gears are rotationally connected to the side, facing the gear motor, of the planetary gear disc, and the planetary gears are meshed with the output end of the gear motor; the baffle is meshed with the inner wall of the roller; the two supporting bearings are arranged at the two axial ends of the roller respectively; the two supporting shafts are rotationally connected to the two axial ends of the roller through two supporting bearings correspondingly; the two supporting shafts are coaxially arranged with the planetary gear disc and the gear motor, one supporting shaft is fixedly connected with the planetary gear disc, and the other supporting shaft is fixedly connected with a shell of the gear motor.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive devices, and particularly relates to an electric roller and a conveying device. Background Art

[0002] Under the development trend of high-power working conditions, the electric roller of the electric drive device gradually changes from the form of an asynchronous motor plus an external gearbox to the direction of motor permanent magnetism. At present, the electric roller is usually a permanent magnet direct drive external rotor electric roller. However, with the increase of the output torque, the permanent magnet direct drive external rotor electric roller occupies a large space and has a high space cost.

[0003] In order to reduce the occupied space, in some technical solutions, the electric roller adopts an in-line electric roller, which includes a roller and a driving structure arranged in the roller. The output end of the driving structure is fixedly connected to the inner wall of the roller to drive the roller to rotate. However, in actual application scenarios, the roller is easily impacted by external forces, and the external forces are transmitted to the driving structure in the roller through the roller, which is easy to damage the driving structure. Therefore, in the related art, the safety and reliability of the electric roller are relatively low. Summary of the Utility Model

[0004] In view of this, the utility model provides an electric roller and a conveying device to solve the problems of high space cost, low safety and low reliability of the electric roller in the related art.

[0005] In a first aspect, the utility model provides an electric roller, which includes: a roller; a driving mechanism arranged in the roller; the driving mechanism includes a planetary gear disc assembly and a reduction motor. The planetary gear disc assembly includes a planetary gear disc and a plurality of planetary gears. The planetary gear disc is fixedly connected to the housing of the reduction motor. The planetary gears are rotatably connected to the side of the planetary gear disc facing the reduction motor. The planetary gears are meshed with the output end of the reduction motor and are also meshed with the inner wall of the roller; two support bearings are respectively arranged at both axial ends of the roller; two support shafts are respectively rotatably connected to both axial ends of the roller through the two support bearings; the two support shafts are coaxially arranged with the planetary gear disc and the reduction motor, and one of the support shafts is fixedly connected to the planetary gear disc, and the other support shaft is fixedly connected to the housing of the reduction motor.

[0006] Beneficial effects: By using the technical solution of the present utility model, firstly, the driving mechanism is arranged inside the drum, reducing the occupied space and lowering the space cost. Secondly, the two support shafts, the planetary gear disc and the housing of the reduction motor are fixedly connected into an integral structure, and the two support shafts are rotatably connected to the axial ends of the drum through two support bearings. When the drum is impacted by an external force, the drum acts all the impact force on the support bearings at both ends, and the planetary gear disc assembly is in meshing fit with the drum. Therefore, the drum cannot act the impact force on the planetary gear disc assembly and the support shafts and the reduction motor connected thereto. The planetary gear disc assembly and the reduction motor only need to transmit torque, greatly improving the safety and reliability of the driving mechanism. Moreover, the support bearings are located at the axial ends of the drum, which is easy to maintain and reduces the maintenance cost.

[0007] In an optional embodiment, a plurality of planetary gear connecting shafts are provided on the side of the planetary gear disc facing the reduction motor. The plurality of planetary gear connecting shafts are arranged at intervals around the axis of the planetary gear disc, and a plurality of planetary gears are rotatably connected to the plurality of planetary gear connecting shafts; a plurality of grooves are provided on the side of the housing of the reduction motor facing the planetary gear disc, and the plurality of planetary gear connecting shafts are respectively inserted into the plurality of grooves.

[0008] Beneficial effects: In this solution, the planetary gear connecting shafts provide rotational support for the planetary gear disc, and the planetary gear connecting shafts are inserted and matched with the grooves, realizing the positioning of the plurality of planetary gears in terms of spatial arrangement, facilitating the simultaneous meshing of the planetary gears with the output end of the reduction motor and the inner wall of the drum, ensuring the reliability of the operation of the driving mechanism, and improving the convenience of assembly.

[0009] In an optional embodiment, a plurality of convex portions are further provided on the side of the planetary gear disc facing the reduction motor. The plurality of convex portions are arranged at intervals around the axis of the planetary gear disc and are alternately arranged with the plurality of planetary gear connecting shafts; the convex portions are in contact with the housing of the reduction motor.

[0010] Beneficial effects: The convex portions are in contact with the housing of the reduction motor, realizing the axial positioning of the planetary gear disc and the planetary gears, and increasing the contact area at the connection between the planetary gear disc and the housing of the reduction motor, ensuring the stability of the relative position between the planetary gear disc and the reduction motor, and further ensuring the reliability of the operation of the driving mechanism.

[0011] In an optional embodiment, the reduction motor includes a motor and a planetary speed reducer which are coaxially arranged and connected, and the output gear of the planetary speed reducer forms the output end of the reduction motor.

[0012] Beneficial effects: In this solution, the form of using a motor in combination with a planetary speed reducer to form a driving unit improves the power density of the electric drum and reduces the cost.

[0013] In an alternative embodiment, the two support shafts are respectively a first support shaft and a second support shaft; the motor includes a motor housing and a motor shaft disposed within the motor housing; the planetary reducer includes a reducer housing and a sun gear shaft penetrating through the reducer housing; wherein, the motor shaft is in transmission connection with the sun gear shaft, and the output gear is rotatably connected to the end of the sun gear shaft away from the motor; along the axis of the sun gear shaft, the first support shaft, the planetary gear disc, the reducer housing, the motor housing and the second support shaft are sequentially bolted together.

[0014] Advantageous effects: In this solution, the first support shaft, the planetary gear disc, the reducer housing, the motor housing and the second support shaft are sequentially bolted together, which not only realizes the fixed connection between components but also facilitates disassembly. Therefore, the components of the drive mechanism can be freely matched to form electric rollers of various specifications, reducing the application cost. For example: for products with different output speeds and torques, the planetary reducer and the planetary gear disc assembly can be shared, and only the motor needs to be replaced; for products with different barrel diameters (i.e., the radial dimensions of the roller), only the planetary gear disc assembly needs to be replaced; for products with different barrel widths (i.e., the axial dimensions of the roller), only the support shaft needs to be replaced.

[0015] In an alternative embodiment, the reducer housing includes a reducer flange and a reducer inner gear housing connected to each other, and the sun gear shaft penetrates through the installation space surrounded by the reducer flange and the reducer inner gear housing; the reducer housing is bolted to the motor housing, and the reducer flange is bolted to the planetary gear disc;

[0016] Preferably, the planetary reducer further includes: a first-stage planetary gear assembly coaxially arranged in sequence, rotatably connected to the end of the sun gear shaft close to the motor; the first-stage planetary gear assembly meshes with the sun gear shaft and also meshes with the reducer inner gear housing; a second-stage sun gear, rotatably connected to the sun gear shaft and fixedly connected to the first-stage planetary gear assembly; a second-stage planetary gear assembly, rotatably connected to the reducer flange and sleeved outside the sun gear shaft; the second-stage planetary gear assembly meshes with the second-stage sun gear and also meshes with the reducer inner gear housing; the output gear is located at the end of the second-stage planetary gear assembly away from the second-stage sun gear and is fixedly connected to the second-stage planetary gear assembly.

[0017] Advantageous effects: In this solution, the reducer housing adopts a reducer flange and a reducer inner gear housing, which is convenient for the assembly of internal components. Moreover, the planetary reducer finally transmits the power to the roller through multi-stage gear matching, realizing load distribution and further improving the reliability of the application of the drive mechanism.

[0018] In an alternative embodiment, the inner diameter of the output gear is greater than the inner diameter of the sun gear shaft, and the inner diameter of the second-stage sun gear is greater than the inner diameter of the sun gear shaft.

[0019] Beneficial effects: In this solution, the inner diameter of the output gear is greater than the inner diameter of the sun gear shaft, and the inner diameter of the second-stage sun gear is greater than the inner diameter of the sun gear shaft. A gap is formed between the output gear and the second-stage sun gear and the sun gear shaft, facilitating the flow of lubricating oil, improving the lubrication and cooling effect, and further enhancing the reliability of the speed reducer.

[0020] In an alternative embodiment, the drive mechanism further includes a brake. The brake is located between the motor and the second support shaft, coaxially arranged and connected with the motor, and the brake is adapted to brake the motor.

[0021] Preferably, along the axis of the second support shaft, a cavity is penetrated through the second support shaft, and the brake is located in the cavity.

[0022] Beneficial effects: In this solution, the brake realizes the amplification of the braking torque through the planetary speed reducer and the planetary gear disc assembly, reduces the selected specification of the brake, and thus reduces the cost. In addition, a cavity is penetrated through the second support shaft, facilitating the placement of the brake and wiring.

[0023] In an alternative embodiment, the drum includes a drum body and a first support flange and a second support flange respectively bolted to both axial ends of the drum body; the two support bearings are respectively a first support bearing and a second support bearing; the first support bearing is arranged in the first support flange, and the first support shaft is rotationally connected to the first support flange through the first support bearing; the second support bearing is arranged in the second support flange, and the second support shaft is rotationally connected to the second support flange through the second support bearing; the planetary gear disc assembly, the planetary speed reducer and the motor are all arranged between the first support flange and the second support flange.

[0024] Beneficial effects: In this solution, the overall structure formed by the first support shaft, the drive mechanism and the second support shaft is relatively separated from the drum in structure, facilitating disassembly and assembly through the first support flange and the second support flange, and the assembly and maintenance are convenient.

[0025] In a second aspect, the present utility model further provides a conveying device, including: the electric drum as described above.

[0026] Beneficial effects: The conveying device of the present utility model includes the above-mentioned electric drum, so it has the same effects as the electric drum of the present utility model, which will not be elaborated here. Description of the Drawings

[0027] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a cross-sectional view of an electric roller according to an embodiment of the present utility model;

[0029] Figure 2 It is a cross-sectional view of a planetary gear disc assembly according to an embodiment of the present utility model;

[0030] Figure 3 It is a structural schematic diagram of a planetary gear disc according to an embodiment of the present utility model;

[0031] Figure 4 It is a cross-sectional view of a planetary speed reducer according to an embodiment of the present utility model;

[0032] Figure 5 It is a structural schematic diagram of a speed reducer flange according to an embodiment of the present utility model;

[0033] Figure 6 It is a cross-sectional view of a second-stage sun gear according to an embodiment of the present utility model;

[0034] Figure 7 It is a cross-sectional view of a motor according to an embodiment of the present utility model;

[0035] Figure 8 It is a cross-sectional view of a second support shaft according to an embodiment of the present utility model.

[0036] Explanation of reference numerals:

[0037] 1. Roller; 11. Roller body; 12. First support flange; 13. Second support flange; 14. Internal gear ring;

[0038] 2. Support bearing; 21. First support bearing; 22. Second support bearing;

[0039] 3. Support shaft; 31. First support shaft; 32. Second support shaft; 321. Cavity; 3211. Large-diameter section; 3212. Tapered section; 3213. Small-diameter section;

[0040] 4. Planetary gear disc assembly; 41. Planetary gear disc; 411. Planetary gear connecting shaft; 412. Convex part; 413. First mating surface; 42. Planetary gear;

[0041] 5. Motor; 51. First motor flange; 52. Motor housing; 53. Second motor flange; 54. Motor shaft;

[0042] 6. Planetary reducer; 61. Reducer flange; 611. Groove; 612. Second mating surface; 62. Inner gear housing of reducer; 63. Sun gear shaft; 64. First-stage planetary gear assembly; 65. First bearing; 66. Second-stage sun gear; 661. Sun gear; 662. Adapter plate; 67. Second-stage planetary gear assembly; 68. Second bearing; 69. Output gear; 610. Third bearing; 620. First snap ring; 630. Second snap ring;

[0043] 7. Brake. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0045] The following combines Figures 1 to 8 , and describes the embodiments of the present utility model.

[0046] According to an embodiment of the present utility model, a conveying device is provided. The conveying device includes, but is not limited to, fixed and mobile conveyors. One or more electric rollers are provided on the conveying device. The electric roller includes a roller 1, a driving mechanism disposed in the roller 1, two support bearings 2 respectively disposed at two axial ends of the roller 1, and two support shafts 3 respectively rotatably connected to the two axial ends of the roller 1 through the two support bearings 2. Both ends of the driving mechanism are respectively fixedly connected to the two support shafts 3 to be supported in the roller 1.

[0047] Specifically, the driving mechanism includes a planetary gear disk assembly 4 and a reduction motor. The planetary gear disk assembly 4 includes a planetary gear disk 41 and a plurality of planetary gears 42. Among them, the planetary gear disk 41 is fixedly connected to the housing of the reduction motor, the planetary gear 42 is rotatably connected to one side of the planetary gear disk 41 facing the reduction motor, the planetary gear 42 meshes with the output end of the reduction motor, and meshes with the inner wall of the roller 1. The driving mechanism finally transmits power to the roller 1 through the planetary gear 42, so that the roller 1 rotates around its own axis. The above two support shafts 3 are coaxially arranged with the planetary gear disk 41 and the reduction motor, and one of the support shafts 3 is fixedly connected to the planetary gear disk 41, and the other support shaft 3 is fixedly connected to the housing of the reduction motor.

[0048] In this embodiment, the driving mechanism is arranged inside the drum 1, which reduces the occupied space and the space cost. Moreover, the two support shafts 3, the planetary gear disc 41 and the housing of the reduction motor are fixedly connected into an integral structure, and the two support shafts 3 are rotatably connected to both axial ends of the drum 1 through two support bearings 2. When the drum 1 is impacted by an external force, the drum 1 applies all the impact force to the support bearings 2 at both ends. Since the planetary gear disc assembly 4 is in meshing fit with the drum 1, the drum 1 cannot apply the impact force to the planetary gear disc assembly 4 and the support shafts 3 and the reduction motor connected thereto. The planetary gear disc assembly 4 and the reduction motor only need to transmit torque, which greatly improves the safety and reliability of the driving mechanism. Moreover, the support bearings 2 are located at both axial ends of the drum 1, which is easy for maintenance and reduces the maintenance cost.

[0049] In some embodiments, as Figure 1 shown, the two support shafts 3 are respectively a first support shaft 31 and a second support shaft 32. The first support shaft 31 is fixedly connected to the planetary gear disc 41, and the second support shaft 32 is fixedly connected to the housing of the reduction motor. Among them, the first support shaft 31 and the planetary gear disc 41 can be fixedly connected by means of riveting, welding, clamping, bolt connection, etc.; the second support shaft 32 and the housing of the reduction motor can also be fixedly connected by means of riveting, welding, clamping, bolt connection, etc.

[0050] In some embodiments, as Figure 2 and 3 shown, a plurality of planetary gear connecting shafts 411 are provided on the side of the planetary gear disc 41 facing the reduction motor. The plurality of planetary gear connecting shafts 411 are arranged at intervals around the axis of the planetary gear disc 41, and a plurality of planetary gears 42 are rotatably connected to the plurality of planetary gear connecting shafts 411. Among them, a plurality of grooves 611 are provided on the side of the housing of the reduction motor facing the planetary gear disc 41, and the plurality of planetary gear connecting shafts 411 are respectively inserted into the plurality of grooves 611. In this embodiment, the planetary gear connecting shafts 411 provide rotational support for the planetary gear disc 41, and the planetary gear connecting shafts 411 are inserted and matched with the grooves 611, realizing the positioning of the plurality of planetary gears 42 in terms of spatial arrangement, facilitating the simultaneous meshing of the planetary gears 42 with the output end of the reduction motor and the inner wall of the drum 1, ensuring the reliability of the operation of the driving mechanism, and improving the assembly convenience.

[0051] Among them, the planetary gear connecting shafts 411 can be configured as columns to facilitate the rotational connection of the planetary gears 42 to the planetary gear connecting shafts 411. Exemplarily, one end of the planetary gear connecting shaft 411 close to the housing of the reduction motor is inserted into the groove 611 and is bolt-connected, riveted, clamped, etc. with the groove 611.

[0052] In some embodiments, a plurality of convex portions 412 are further provided on the side of the planetary gear disc 41 facing the reduction motor. The plurality of convex portions 412 are arranged at intervals around the axis of the planetary gear disc 41 and are alternately arranged with the plurality of planetary gear connecting shafts 411; the convex portions 412 are in contact with the outer shell of the reduction motor. The contact between the convex portions 412 and the outer shell of the reduction motor realizes the axial positioning of the planetary gear disc 41 and the planetary gears 42, and increases the contact area at the connection between the planetary gear disc 41 and the outer shell of the reduction motor, ensuring the stability of the relative position between the planetary gear disc 41 and the reduction motor, and further ensuring the reliability of the operation of the drive mechanism.

[0053] Among them, the end face of the convex portion 412 close to the outer shell of the reduction motor forms a first mating surface 413, and the first mating surface 413 is in contact with the outer shell of the reduction motor.

[0054] The present utility model does not specifically limit the number and arrangement mode of the planetary gear connecting shafts 411 and the convex portions 412, as long as the fixed connection with the outer shell of the reduction motor can be achieved. In some embodiments, a plurality of planetary gear connecting shafts 411 and convex portions 412 are provided. The plurality of planetary gear connecting shafts 411 and the plurality of convex portions 412 are alternately and evenly arranged at intervals around the axis of the planetary gear disc 41.

[0055] In some embodiments, the reduction motor includes a motor 5 and a planetary speed reducer 6 that are coaxially arranged and connected. The output gear 69 of the planetary speed reducer 6 forms the output end of the reduction motor. Adopting the form of combining the motor 5 with the planetary speed reducer 6 to form a drive unit improves the power density of the electric roller and reduces the cost.

[0056] In some embodiments, the reduction motor includes a reducer housing, and the reducer housing includes a reducer flange 61 and a reducer internal gear housing 62 that are connected. Among them, the reducer flange 61 is close to the planetary gear disc assembly 4 and is fixedly connected to the planetary gear disc 41. As Figure 5 shown, the end face of the reducer flange 61 facing the planetary gear disc 41 forms a second mating surface 612, and the above-mentioned groove 611 is provided on the second mating surface 612. The plurality of planetary gear connecting shafts 411 of the planetary gear disc 41 are respectively inserted into the plurality of grooves 611 on the second mating surface 612, and the first mating surface 413 of the convex portion 412 is in contact with the second mating surface 612. Exemplarily, one end of the convex portion 412 facing the second mating surface 612 can also be bolted, welded or riveted to the reducer flange 61, etc. Preferably, the planetary gear connecting shafts 411 and the bosses are both bolted to the reducer flange 61 for easy disassembly and assembly.

[0057] In some embodiments, the motor 5 includes a motor housing and a motor shaft 54 disposed within the motor housing. The planetary speed reducer 6 includes a speed reducer housing and a sun gear shaft 63 disposed therethrough within the speed reducer housing. Among them, the motor shaft 54 is drivingly connected to the sun gear shaft 63, and an output gear 69 is rotatably connected to one end of the sun gear shaft 63 away from the motor 5. The output gear 69 meshes with the plurality of planetary gears 42 described above to transmit power to the drum 1.

[0058] Among them, along the axis of the sun gear shaft 63, the first support shaft 31, the planetary gear disk 41, the speed reducer housing, the motor housing, and the second support shaft 32 are sequentially bolted together. Each component is bolted together, which not only realizes the fixed connection between the components but also facilitates disassembly. Therefore, the components of the drive mechanism can be freely matched to form electric drums of various specifications, reducing the application cost. For example: for products with different output speeds and torques, the planetary speed reducer 6 and the planetary gear disk assembly 4 can be shared, and only the motor 5 needs to be replaced; for products with different drum diameters (i.e., the radial dimensions of the drum 1), only the planetary gear disk assembly 4 needs to be replaced; for products with different drum widths (i.e., the axial dimensions of the drum 1), only the support shaft 3 needs to be replaced.

[0059] Furthermore, as Figure 6 shown, in some embodiments, the speed reducer housing includes a speed reducer flange 61 and a speed reducer internal gear housing 62 connected to each other, and the sun gear shaft 63 is disposed therethrough within the installation space defined by the speed reducer flange 61 and the speed reducer internal gear housing 62. The speed reducer housing is bolted to the motor housing, and the speed reducer flange 61 is bolted to the planetary gear disk 41 to facilitate the assembly of the internal components of the speed reducer.

[0060] In some embodiments, the planetary speed reducer 6 further includes a first-stage planetary gear assembly 64, a first bearing 65, a second-stage sun gear 66, a second-stage planetary gear assembly 67, and the above-mentioned output gear 69 arranged coaxially in sequence. The planetary speed reducer 6 finally transmits power to the drum 1 through multi-stage gear matching, realizing load distribution and further improving the reliability of the application of the drive mechanism.

[0061] Among them, the first bearing 65 is sleeved and fixed to one end of the sun gear shaft 63 close to the motor 5, and the first-stage planetary gear assembly 64 is rotatably connected to one end of the sun gear shaft 63 close to the motor 5 through the first bearing 65. The first-stage planetary gear assembly 64 meshes with the sun gear shaft 63 and also meshes with the speed reducer internal gear housing 62.

[0062] Among them, the second-stage sun gear 66 is rotatably connected to the sun gear shaft 63, and one end close to the first-stage planetary gear assembly 64 is fixedly connected to the first-stage planetary gear assembly 64, and the end away from the first-stage planetary gear assembly 64 meshes with the second-stage planetary gear assembly 67. AsFigure 6 As shown, the second-stage sun gear 66 includes a sun gear 661 and an adapter plate 662 that are coaxially arranged and connected. The sun gear 661 is disposed close to the second-stage planetary gear assembly 67 and meshes with the second-stage planetary gear assembly 67. The adapter plate 662 is disposed close to the first-stage planetary gear assembly 64 and is fixedly connected to the first-stage planetary gear assembly 64, such as by bolted connection; at the same time, the adapter plate 662 presses against the outer ring of the first bearing 65.

[0063] Among them, a second bearing 68 is provided on one side of the reducer flange 61 facing the internal gear housing 62 of the reducer. The outer ring of the second bearing 68 is fixedly connected to the reducer flange 61, and the inner ring is fixedly connected to the second-stage planetary gear assembly 67. That is, the second-stage planetary gear assembly 67 is rotatably connected to the reducer flange 61 through the second bearing 68 and is sleeved outside the sun gear shaft 63. One end of the second-stage planetary gear assembly 67 away from the second-stage sun gear 66 is fixedly connected to the inner ring of the second bearing 68, and the end close to the second-stage sun gear 66 meshes with the second-stage sun gear 66 and also meshes with the internal gear housing 62 of the reducer at the same time.

[0064] Among them, at the end of the sun gear shaft 63 away from the motor 5, that is, the end close to the planetary gear disk assembly 4, a third bearing 610 is also provided. The output gear 69 is rotatably connected to the sun gear shaft 63 through the third bearing 610. The output gear 69 is located at one end of the second-stage planetary gear assembly 67 away from the second-stage sun gear 66. One end of the output gear 69 is fixedly connected to the second-stage planetary gear assembly 67, and the other end meshes with the planetary gear 42 of the planetary gear disk assembly 4.

[0065] Among them, a first circlip 620 and a second circlip 630 are also provided at the end of the sun gear shaft 63 away from the motor 5. There are two first circlips 620, and both of the two first circlips 620 are sleeved on the sun gear shaft 63 and are arranged at intervals along the axial direction. The third bearing 610 is clamped between the two first circlips 620. The two first circlips 620 achieve axial limit for the third bearing 610. The second circlip 630 is sleeved on the inner wall of the output gear 69 and is located axially outside the third bearing 610. The second circlip 630 achieves axial limit for the output gear 69 and all levels of gears inside the output gear 69 through the third bearing 610.

[0066] In some embodiments, the inner diameter of the output gear 69 is larger than the inner diameter of the sun gear shaft 63, and the inner diameter of the second-stage sun gear 66 is larger than the inner diameter of the sun gear shaft 63. Clearances are formed between the output gear 69 and the second-stage sun gear 66 and the sun gear shaft 63, facilitating the flow of lubricating oil, improving the lubrication and cooling effect, and further improving the reliability of the reducer.

[0067] In some embodiments, such as Figure 1As shown, the driving mechanism further includes a brake 7, which is located between the motor 5 and the second support shaft 32. The brake 7 is coaxially arranged and connected to the motor 5, and the brake 7 is suitable for braking the motor 5. The brake 7 amplifies the braking torque through the planetary reducer 6 and the planetary gear plate assembly 4, reduces the selection specifications of the brake 7, and thus reduces the cost.

[0068] In some embodiments, Figure 8 As shown, along the axis of the second support shaft 32 , a cavity 321 is provided through the second support shaft 32 , and the brake 7 is located in the cavity 321 , so as to facilitate the placement of the brake 7 and the routing of the wires.

[0069] Exemplarily, the cavity 321 includes a large diameter section 3211, a tapered section 3212 and a small diameter section 3213 which are connected and communicated in sequence, the large diameter end of the tapered section 3212 is connected to the large diameter section 3211, and the small diameter section 3213 is connected to the small diameter section 3213. The brake 7 is placed in the large diameter section 3211, and the power lines of the motor 5 and the brake 7 are led out to the outside of the drum 1 through the tapered section 3212 and the small diameter section 3213. The tapered section 3212 facilitates the smooth leading out of the power line without scratching.

[0070] In some embodiments, Figure 7 As shown, the motor housing includes a first motor flange 51, a motor housing 52 and a second motor flange 53. The first motor flange 51 and the second motor flange 53 are respectively fixedly connected to the two axial ends of the motor housing 52. One end of the motor shaft 54 passes through the first motor flange 51 to be transmission-connected to the sun gear shaft 63; the other end of the motor shaft 54 is connected to the brake 7. The brake 7 is fixedly connected to the second motor flange 53, and the power line of the motor 5 is led out through the second motor flange 53, and is led out through the cavity 321 of the second support shaft 32 together with the power line of the brake 7.

[0071] In some embodiments, the drum 1 includes a drum body 11 and a first support flange 12 and a second support flange 13 respectively bolted to the two axial ends of the drum body 11. The two support bearings 2 are respectively a first support bearing 21 and a second support bearing 22; the first support bearing 21 is arranged in the first support flange 12, and the first support shaft 31 is rotatably connected to the first support flange 12 through the first support bearing 21. The second support bearing 22 is arranged in the second support flange 13, and the second support shaft 32 is rotatably connected to the second support flange 13 through the second support bearing 22. The planetary gear plate assembly 4, the planetary reducer 6 and the motor 5 are all arranged between the first support flange 12 and the second support flange 13.

[0072] In this embodiment, the overall structure formed by the first support shaft 31, the drive mechanism, and the second support shaft 32 is structurally relatively separated from the drum 1, which facilitates disassembly and assembly through the first support flange 12 and the second support flange 13, and is convenient for assembly and maintenance.

[0073] In some embodiments, an internal gear ring 14 is provided on the inner wall of the drum body 11. A plurality of planet gears 42 of the planetary gear disk assembly 4 are engaged with the output gear 69 and at the same time engaged with the internal gear ring 14 to transmit the power of the motor 5 and the planetary reducer 6 to the drum body 11. The drum body 11 drives the first support flange 12 and the second support flange 13 to rotate relative to the two support shafts 3. Among them, the internal gear ring 14 can be fixed to the inner side wall of the drum body 11 through a connection structure, or integrally formed on the inner side wall of the drum body 11.

[0074] The transmission mode of the electric drum of the present utility model is as follows: the first support shaft 31, the planetary gear disk 41, the reducer flange 61, the reducer internal gear housing 62, the first motor flange 51, the motor housing 52, the second motor flange 53, and the second support shaft 32 are sequentially fixed together by screws. Among them, the first support shaft 31 and the second support shaft 32 are respectively fixed to the outside, and at the same time, the motor 5, the planetary reducer 6, and the planetary gear disk assembly 4 are fixed. The motor shaft 54 rotates to drive the sun gear shaft 63 to rotate. The first-stage planetary gear assembly 64 is simultaneously engaged with the sun gear shaft 63 and the reducer internal gear housing 62, and is output by the second-stage sun gear 66; the second-stage planetary gear assembly 67 is simultaneously engaged with the second-stage sun gear 66 and the reducer internal gear housing 62, and is output by the output gear 69; the planetary gear 42 is simultaneously engaged with the output gear 69 and the internal gear ring 14. Since the planetary gear 42 is fixed to the reducer flange 61 through the planetary gear disk 41 and the internal gear ring 14 is fixed to the drum body 11, the power output by the output gear 69 is finally transmitted to the drum body 11 through the internal gear ring 14 and transmitted externally. The brake 7 is fixed to the second motor flange 53. When braking occurs, the brake 7 holds the brake, the motor shaft 54 is braked, and through the above transmission, finally the entire electric drum is braked.

[0075] Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An electric roller, characterized in that, Comprising: A drum (1); A driving mechanism disposed within the drum (1); the driving mechanism includes a planetary gear disk assembly (4) and a reduction motor. The planetary gear disk assembly (4) includes a planetary gear disk (41) and a plurality of planetary gears (42). The planetary gear disk (41) is fixedly connected to the housing of the reduction motor. The planetary gears (42) are rotatably connected to one side of the planetary gear disk (41) facing the reduction motor. The planetary gears (42) are meshed with the output end of the reduction motor and are also meshed with the inner wall of the drum (1); Two support bearings (2) respectively arranged at two axial ends of the drum (1); Two support shafts (3) respectively rotatably connected to two axial ends of the drum (1) through the two support bearings (2); the two support shafts (3) are coaxially arranged with the planetary gear disk (41) and the reduction motor, and one of the support shafts (3) is fixedly connected to the planetary gear disk (41), and the other support shaft (3) is fixedly connected to the housing of the reduction motor.

2. The electric roller according to claim 1, wherein, On one side of the planetary gear disk (41) facing the reduction motor, there are provided a plurality of planetary gear connecting shafts (411). The plurality of planetary gear connecting shafts (411) are arranged at intervals around the axis of the planetary gear disk (41). The plurality of planetary gears (42) are rotatably connected to the plurality of planetary gear connecting shafts (411); On one side of the housing of the reduction motor facing the planetary gear disk (41), there are provided a plurality of grooves (611). The plurality of planetary gear connecting shafts (411) are respectively inserted into the plurality of grooves (611).

3. The electric roller according to claim 2, characterized in that, On one side of the planetary gear disk (41) facing the reduction motor, there are also provided a plurality of convex portions (412). The plurality of convex portions (412) are arranged at intervals around the axis of the planetary gear disk (41) and are arranged alternately with the plurality of planetary gear connecting shafts (411); the convex portions (412) are in contact with the housing of the reduction motor.

4. The electric roller according to any one of claims 1 to 3, characterized in that, The reduction motor includes a motor (5) and a planetary speed reducer (6) which are coaxially arranged and connected. The output gear (69) of the planetary speed reducer (6) forms the output end of the reduction motor.

5. The electric roller according to claim 4, characterized in that, The two support shafts (3) are respectively a first support shaft (31) and a second support shaft (32); The motor (5) includes a motor housing and a motor shaft (54) disposed within the motor housing; The planetary speed reducer (6) includes a speed reducer housing and a sun gear shaft (63) penetrating through the speed reducer housing; Wherein, the motor shaft (54) is in transmission connection with the sun gear shaft (63). The output gear (69) is rotatably connected to one end of the sun gear shaft (63) far from the motor (5). Along the axis of the sun gear shaft (63), the first support shaft (31), the planetary gear disk (41), the speed reducer housing, the motor housing and the second support shaft (32) are sequentially bolted.

6. The electric roller according to claim 5, characterized in that, The speed reducer housing includes a speed reducer flange (61) and a speed reducer internal gear housing (62) that are connected to each other. The sun gear shaft (63) is disposed through the installation space defined by the speed reducer flange (61) and the speed reducer internal gear housing (62). The speed reducer housing is bolted to the motor housing, and the speed reducer flange (61) is bolted to the planetary gear disc (41). Preferably, the planetary speed reducer (6) further includes the following components arranged coaxially in sequence: A first-stage planetary gear assembly (64), rotatably connected to one end of the sun gear shaft (63) close to the motor (5). The first-stage planetary gear assembly (64) meshes with the sun gear shaft (63) and also meshes with the speed reducer internal gear housing (62). A second-stage sun gear (66), rotatably connected to the sun gear shaft (63) and fixedly connected to the first-stage planetary gear assembly (64). A second-stage planetary gear assembly (67), rotatably connected to the speed reducer flange (61) and sleeved outside the sun gear shaft (63). The second-stage planetary gear assembly (67) meshes with the second-stage sun gear (66) and also meshes with the speed reducer internal gear housing (62). The output gear (69) is located at one end of the second-stage planetary gear assembly (67) away from the second-stage sun gear (66) and is fixedly connected to the second-stage planetary gear assembly (67).

7. The electric roller according to claim 6, characterized in that, The inner diameter of the output gear (69) is greater than the inner diameter of the sun gear shaft (63), and the inner diameter of the second-stage sun gear (66) is greater than the inner diameter of the sun gear shaft (63).

8. The electric roller according to claim 5, characterized in that, The drive mechanism further includes a brake (7). The brake (7) is located between the motor (5) and the second support shaft (32). The brake (7) is coaxially arranged and connected with the motor (5), and the brake (7) is adapted to brake the motor (5). Preferably, along the axis of the second support shaft (32), a cavity (321) is disposed through the second support shaft (32), and the brake (7) is located within the cavity (321).

9. The electric roller according to claim 5, wherein, The drum (1) includes a drum body (11) and a first support flange (12) and a second support flange (13) that are respectively bolted to both axial ends of the drum body (11). The two support bearings (2) are respectively a first support bearing (21) and a second support bearing (22). The first support bearing (21) is disposed within the first support flange (12), and the first support shaft (31) is rotatably connected to the first support flange (12) through the first support bearing (21). The second support bearing (22) is disposed within the second support flange (13), and the second support shaft (32) is rotatably connected to the second support flange (13) through the second support bearing (22). The planetary gear disc assembly (4), the planetary speed reducer (6), and the motor (5) are all arranged between the first support flange (12) and the second support flange (13).

10. A conveying device, characterized in that, including: The electric roller according to any one of claims 1 to 9.

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