Electric roller with sealing structure

Abstract

The utility model discloses an electric roller with a sealing structure. The electric roller is characterized in that a roller body is provided with an accommodating cavity; the speed reduction assembly is accommodated in the accommodating cavity; the motor assembly is contained in the containing cavity and comprises a shell, a front end cover and a rear end cover, the shell, the front end cover and the rear end cover are matched to form a cavity, a rotor assembly and a stator assembly are contained in the cavity, and the rotor assembly comprises a rotor iron core; a first sealing element and a first bearing are arranged between the front end cover and the rotor iron core, the rotor iron core is sleeved with the first bearing and the first sealing element, and the rotor iron core penetrates through the first bearing and the first sealing element to be matched with the speed reduction assembly; second sealing pieces are arranged between the shell and the front end cover and between the shell and the rear end cover. According to the design, when lubricating oil is injected into the containing cavity of the roller for cooling, the lubricating oil is effectively prevented from entering the motor assembly, and the oil stirring power loss of the motor assembly is reduced; and scrap iron generated by abrasion of the speed reduction assembly is prevented from entering the motor assembly, so that the fault rate of the motor assembly is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric roller technology, and specifically to an electric roller with a sealing structure. Background Art

[0002] An electric roller conveyor is a drive device that integrates both the motor and reducer inside the roller body. Electric roller conveyors are mainly used in stationary and mobile belt conveyors, replacing traditional separate drive devices where the motor and reducer are located outside the drive roller. Electric roller conveyors offer numerous advantages, including compact structure, high transmission efficiency, smooth operation, reliable performance, good sealing, small footprint, and easy installation. They are also suitable for operation in various harsh environments.

[0003] However, existing conventional electric rollers mainly adopt the structure of an AC motor oil-immersed electric roller, which has low motor efficiency. As lubricating oil enters the motor, the output resistance increases and losses increase. At the same time, the quality of the lubricating oil can easily cause the motor to burn out. Permanent magnet synchronous motors, because their rotors have strong magnetism, are prone to attracting iron filings and impurities to the rotor surface due to the existing roller structure, which can lead to jamming or coil insulation failure. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is how to improve the service life of the motor.

[0005] Therefore, an electric roller with a sealed structure includes:

[0006] The cylindrical body is provided with a receiving cavity;

[0007] A reduction gear assembly, the reduction gear assembly being housed in the receiving cavity;

[0008] A motor assembly is housed in the receiving cavity. The motor assembly includes a housing, a front cover, and a rear cover. The housing, front cover, and rear cover cooperate to form a cavity. The cavity houses a rotor assembly and a stator assembly. The rotor assembly includes a rotor core. The rotor core passes through the front cover and cooperates with the reduction assembly.

[0009] A first sealing element and a first bearing are provided between the front end cover and the rotor core. The first bearing and the first sealing element are sleeved on the rotor core. The rotor core passes through the first bearing and the first sealing element and cooperates with the reduction assembly.

[0010] A second sealing element is provided between the housing and the front cover and the rear cover.

[0011] The first sealing element includes a bracket portion, a rubber portion, and a spring. The rubber portion wraps around the bracket portion and has a contact surface that mates with the rotor core. The spring drives the contact surface to fit against the rotor core.

[0012] The rubber part is also provided with dustproof protrusions, which are in contact with the rotor core.

[0013] The front end cover is provided with a stepped groove, and the first seal and the first bearing respectively abut against the stepped groove.

[0014] It also includes a rear output shaft and a flat key body. The rear end cover has a blind hole, the flat key body is accommodated in the blind hole, and the flat key body is connected to the rear output shaft.

[0015] It also includes a waterproof connector, which is housed in the receiving cavity and connected to the lead wire.

[0016] The rotor assembly includes magnetic tiles embedded within the rotor core.

[0017] The rotor assembly also includes an end plate located at the end of the magnet.

[0018] The rotor assembly also includes a locking nut, which locks the end plate to the magnet.

[0019] It also includes an output flange, which mates with the cylinder.

[0020] The technical solution of this utility model has the following advantages:

[0021] 1. This utility model provides an electric drum with a sealed structure. The first sealing element forms a sealing effect between the rotor core and the front end cover, and the second sealing element forms a sealing effect between the housing, the front end cover, and the rear end cover, so that the motor assembly forms a sealed space. With the above design, when the drum's receiving cavity is injected with lubricating oil for cooling, it can effectively prevent lubricating oil from entering the motor assembly, reducing the oil stirring power loss of the motor assembly; it also prevents iron filings generated by the wear of the reduction assembly from entering the motor assembly, thereby reducing the failure rate of the motor assembly.

[0022] 2. The electric roller with a sealing structure provided by this utility model improves the strength of the entire first sealing element by setting the bracket part, and the spring can make the contact surface better fit with the rotor core to form a sealing effect.

[0023] 3. The electric roller with a sealed structure provided by this utility model has a dustproof protrusion, which further improves the sealing effect and prevents iron filings or foreign objects from entering the motor assembly.

[0024] 4. The electric roller with a sealing structure provided by this utility model has a stepped groove, which better achieves the fixing effect of the first sealing element and the first bearing.

[0025] 5. The electric roller with a sealing structure provided by this utility model has blind holes that form a sealing effect of the rear end cover, further improving the sealing effect of the motor assembly.

[0026] 6. The electric roller with a sealed structure and waterproof joint provided by this utility model solves the problem of oil leakage at the lead wire.

[0027] 7. The electric roller with a sealed structure provided by this utility model has an end plate designed to prevent the magnetic tiles from flying out under centrifugal force.

[0028] 8. The present invention provides an electric roller with a sealed structure, wherein the locking nut prevents the end plate from falling off during operation. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 A cross-sectional view of an electric roller with a sealing structure provided by this utility model;

[0031] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0032] Figure 3 for Figure 1 Enlarged view of part B in the middle;

[0033] Figure 4 A partial cross-sectional view of the first sealing element provided by this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 11. Cylinder; 12. Reduction assembly; 13. Motor assembly; 14. Housing; 15. Front cover; 16. Rear cover; 17. Cavity; 18. Rotor assembly; 19. Stator assembly; 20. Front output shaft; 21. First seal; 22. First bearing; 23. Second seal; 24. Rear output shaft; 25. Key; 26. Waterproof connector; 27. Lead wire; 28. Magnet; 29. ​​End plate; 30. Locking nut; 31. Output flange; 111. Receiving cavity; 151. Stepped groove; 161. Blind hole; 181. Rotor core; 211. Support section; 212. Rubber section; 213. Spring; 214. Outer ring; 215. Inner ring; 216. Contact surface; 217. Dustproof protrusion. DETAILED DESCRIPTION

[0036] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] Example 1

[0041] This embodiment provides an electric roller with a sealed structure, as shown in the attached figure. Figure 1-4As shown, it includes:

[0042] The cylinder 11 has a receiving cavity 111, which is a sealed structure. When lubricating oil is injected into the cylinder 11, the lubricating oil will not leak. How the receiving cavity 111 achieves sealing is existing technology, so it will not be described in detail in this embodiment.

[0043] The reduction assembly 12 is housed in the receiving cavity 111. Here, the reduction assembly 12 can be a planetary gear.

[0044] The motor assembly 13 is housed in the receiving cavity 111 and is located on one side of the reduction assembly 12. The motor assembly 13 includes a housing 14, a front cover 15, and a rear cover 16. These components together form a cavity 17. The front cover 15 is fixedly connected to the front side of the housing 14, and the rear cover 16 is fixedly connected to the rear side of the housing 14, forming the cavity 17 structure. The cavity 17 houses a rotor assembly 18 and a stator assembly 19. The rotor assembly 18 and stator assembly 19 cooperate to form important components of the motor assembly 13, creating a drive source. The rotor assembly 18 includes a rotor core 181. The rotor core 181 passes through the front cover 15 and engages with the reduction assembly 12. The reduction assembly 12 is located on one side of the front cover 15, and the rotor core 181 passes through the front cover 15 and engages with the reduction assembly 12. It should be noted that the other end of the reduction assembly 12 is connected to the front output shaft 20, ultimately achieving the rotation of the cylinder 11; this is existing technology. A first seal 21 and a first bearing 22 are provided between the front cover 15 and the rotor core 181. The first bearing 22 and the first seal 21 are fitted onto the rotor core 181, and the first bearing 22 cooperates with the rotor core 181 to reduce frictional resistance during rotation. The first seal 21 is located between the first bearing 22 and the front cover 15. The rotor core 181 passes through the first bearing 22 and the first seal 21 and cooperates with the reduction assembly 12, and the first seal 21 forms a seal between the rotor core 181 and the front cover 15.

[0045] A second sealing element 23 is provided between the housing 14 and the front cover 15 and the rear cover 16. There are two second sealing elements 23, that is, a second sealing element 23 is provided between the housing 14 and the front cover 15, and a second sealing element 23 is also provided between the housing 14 and the rear cover 16. The second sealing element 23 and the first sealing element 21 make the entire cavity 17 form a sealed structure, that is, a double seal. The receiving cavity 111 is a sealed body, the motor assembly 13 is located in the receiving cavity 111, and the cavity 17 inside the motor assembly 13 is also a sealed body, so that the rotor assembly 18 and the stator assembly 19 of the motor assembly 13 are located in a sealed space. The first seal 21 forms a seal between the rotor core 181 and the front cover 15, and the second seal 23 forms a seal between the housing 14, the front cover 15, and the rear cover 16, so that the motor assembly 13 forms a sealed space. With the above design, when the drum cavity 111 is filled with lubricating oil for cooling, it can effectively prevent lubricating oil from entering the motor assembly 13 and reduce the oil stirring power loss of the motor assembly 13; it also prevents iron filings generated by the wear of the reduction assembly 12 from entering the motor assembly 13, thereby reducing the failure rate of the motor assembly 13.

[0046] Specifically, as shown in the attached document Figure 1 , 4 As shown, the first sealing element 21 includes a support portion 211, a rubber portion 212, and a spring 213. The rubber portion 212 encloses the support portion 211. In this embodiment, the rubber portion 212 is an annular structure. The support portion 211 is located inside the rubber portion 212 and is used to increase the overall strength. Here, the support portion 211 can be made of metal. The rubber portion 212 forms an outer ring 214 and an inner ring 215, with the bottom surface of the outer ring 214 connected to the bottom surface of the inner ring 215. The side of the inner ring 215 away from the outer ring 214 has a contact surface 216 that mates with the rotor core 181. The spring 213 is located between the outer ring 214 and the inner ring 215, and the spring 213 abuts against the side wall of the inner ring 215 to drive the contact surface 216 to fit against the rotor core 181. The support portion 211 enhances the overall strength of the first seal 21, while the spring 213 ensures better contact between the contact surface 216 and the rotor core 181, achieving a sealing effect. Alternatively, a simple sealing ring can be used to form a sealing structure; however, the sealing effect of the first seal 21 in this embodiment is superior.

[0047] Specifically, as shown in the attached document Figure 1 , 4As shown, the rubber part 212 is also provided with a dustproof protrusion 217. This dustproof protrusion 217 is located on the side of the inner ring 215 away from the outer ring 214. The dustproof protrusion 217 is closer to the cavity 17 than the contact surface 216, and it seals the opening of the cavity 17. The dustproof protrusion 217 is in contact with the rotor core 181. The dustproof protrusion 217 further improves the sealing effect, preventing iron filings or foreign objects from entering the motor assembly 13.

[0048] Specifically, as shown in the attached document Figure 1 As shown, the front cover 15 is provided with a stepped groove 151, and the first seal 21 and the first bearing 22 abut against the stepped groove 151 respectively. The stepped groove 151 is provided to better achieve the fixing effect of the first seal 21 and the first bearing 22. Here, the stepped groove 151 is located on the side close to the rotor core 181.

[0049] Specifically, as shown in the attached document Figure 1 As shown, it also includes a rear output shaft 24 and a flat key body 25. The rear end cover 16 has a blind hole 161, which is located on the side of the rear end cover 16 away from the cavity 17. The flat key body is housed in the blind hole 161, and the flat key body 25 is connected to the rear output shaft 24. The blind hole 161 creates a sealing effect for the rear end cover 16, further improving the sealing effect of the motor assembly 13. The size, shape, and dimensions of the blind hole 161 can be adjusted according to actual needs. The rear output shaft 24 is housed in the receiving cavity 111, and the other end of the rear output shaft 24 extends toward the rear end of the cylinder 11 and extends to the outside of the receiving cavity 111.

[0050] Specifically, as shown in the attached document Figure 1 As shown, it also includes a waterproof connector 26, which is housed in the receiving cavity 111 and connected to the lead wire 27. The waterproof connector 26 solves the problem of oil leakage at the lead wire 27. Here, the lead wire 27 is electrically connected to the inside of the motor assembly 13.

[0051] Specifically, the rotor assembly 18 includes a magnet 28, which is embedded in the rotor core 181.

[0052] Specifically, the rotor assembly 18 also includes an end plate 29, which is located at the end of the magnet 28. The end plate 29 is provided to prevent the magnet 28 from flying out under centrifugal force.

[0053] Specifically, the rotor assembly 18 also includes a locking nut 30, which locks the end plate 29 and the magnet 28. The locking nut 30 prevents the end plate 29 from falling off during operation.

[0054] Specifically, it also includes an output flange 31, which mates with the cylinder 11. Here, the output flange 31 mates with the rear end of the cylinder 11, and the rear output shaft 24 passes through the output flange 31. In this embodiment, a sealing structure is also provided between the output flange 31 and the cylinder 11.

[0055] Specifically, it also includes plugs or oil seals or other sealing structures to increase the sealing effect of the cylinder 11.

[0056] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An electric roller with a sealed structure, characterized in that, include: The cylindrical body (11) is provided with a receiving cavity (111); A reduction gear assembly (12) is housed in the receiving cavity (111); A motor assembly (13) is housed in the receiving cavity (111). The motor assembly (13) includes a housing (14), a front cover (15), and a rear cover (16). The housing (14), the front cover (15), and the rear cover (16) cooperate to form a cavity (17). The cavity (17) houses a rotor assembly (18) and a stator assembly (19). The rotor assembly (18) includes a rotor core (181). The rotor core (181) passes through the front cover (15) and cooperates with the reduction assembly (12). A first sealing element (21) and a first bearing (22) are provided between the front end cover (15) and the rotor core (181). The first bearing (22) and the first sealing element (21) are sleeved on the rotor core (181). The rotor core (181) passes through the first bearing (22) and the first sealing element (21) and cooperates with the reduction assembly (12). A second sealing element (23) is provided between the housing (14) and the front end cover (15) and the rear end cover (16).

2. The electric roller with a sealed structure according to claim 1, characterized in that, The first sealing element (21) includes a bracket portion (211), a rubber portion (212), and a spring (213). The rubber portion (212) wraps around the bracket portion (211) and has a contact surface (216) that cooperates with the rotor core (181). The spring (213) drives the contact surface (216) to fit against the rotor core (181).

3. The electric roller with a sealed structure according to claim 2, characterized in that, The rubber part (212) is also provided with a dustproof protrusion (217), which is in contact with the rotor core (181).

4. The electric roller with a sealed structure according to claim 1, characterized in that, The front cover (15) is provided with a stepped groove (151), and the first seal (21) and the first bearing (22) respectively abut against the stepped groove (151).

5. The electric roller with a sealed structure according to claim 1, characterized in that, It also includes a rear output shaft (24) and a flat key body (25). The rear end cover (16) is provided with a blind hole (161). The flat key body is accommodated in the blind hole (161). The flat key body (25) is connected to the rear output shaft (24).

6. The electric roller with a sealed structure according to claim 1, characterized in that, It also includes a waterproof connector (26), which is housed in the receiving cavity (111) and is connected to the lead wire (27).

7. The electric roller with a sealed structure according to claim 1, characterized in that, The rotor assembly (18) includes a magnet (28) embedded in the rotor core (181).

8. The electric roller with a sealed structure according to claim 7, characterized in that, The rotor assembly (18) also includes an end plate (29) located at the end of the magnet (28).

9. The electric roller with a sealed structure according to claim 8, characterized in that, The rotor assembly (18) also includes a locking nut (30) that locks the end plate (29) to the magnet (28).

10. The electric roller with a sealed structure according to claim 1, characterized in that, It also includes an output flange (31), which mates with the cylinder (11).

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