Electric roller end sealing structure and roller conveying line

Abstract

The utility model relates to an electric roller end sealing structure and a roller conveying line. The technical problem that an existing electric roller end cover is unreasonable in sealing design is solved. The electric roller end sealing structure comprises an end cover which is of a cylindrical structure, and a central cavity, a rotating cavity and a roller cavity which are axially arranged in a stepped mode are sequentially arranged in the end cover outwards in the radial direction of a central shaft; the positioning mandrel is axially arranged in the end cover in a penetrating mode, one end of the positioning mandrel penetrates out of the outer side of the end cover, and an outer oil seal connected to the circumferential outer wall of the positioning mandrel in a sleeving mode is embedded in the bottom of the center cavity; the bearings are located and embedded in the rotating cavity, and the bearings are connected to the circumferential outer wall of the locating mandrel in a sleeving mode; and the supporting outer cylinder is fixedly connected with the end cover, and the roller cavity is an annular groove which is concave in the axial direction. According to the end sealing structure of the electric roller, the axial pressure of the outer oil seal is reduced, the mutual influence is reduced, and the overall sealing performance of the electric roller is improved.

Description

Technical Field

[0001] This utility model belongs to the field of electric rollers and relates to an end sealing structure for an electric roller and a roller conveyor line. Background Technology

[0002] For example, Chinese patent literature discloses a novel oil-proof, easily detachable electric roller [201610587264.0], which includes a roller, an end cover, and an oil seal assembly. The oil seal assembly includes an oil seal bushing, a cover, and a skeleton oil seal. The bearing includes an inner ring, an outer ring, a ball cavity located between the inner and outer rings, and balls. The end cover includes a mounting sleeve, which includes a sleeve body and a sleeve cavity. The bearing is located in the sleeve cavity. The sleeve body has a return hole that connects the inner and outer spaces of the end cover. The cover has a return groove that connects the return hole and the ball cavity.

[0003] The drawbacks of the above technical solutions are: the end cap tends to be a flat plate structure, the internal components of the drum are in the same cavity space, which requires high sealing performance, and the axial pressure of the oil seal is large in practice. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing an electric drum end sealing structure and a drum conveyor line.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] The electric drum end sealing structure includes:

[0007] The end cap has a cylindrical structure, and the interior of the end cap is provided with a central cavity, a rotating cavity and a roller cavity arranged in an axially stepped manner along the central axis radially outward.

[0008] A positioning mandrel is axially inserted into the end cover and one end extends out of the outside of the end cover. An outer oil seal is fitted at the bottom of the central cavity and sleeved on the circumferential outer wall of the positioning mandrel.

[0009] The bearing has at least one set and is positioned and embedded in the rotating cavity, the bearing being sleeved on the circumferential outer wall of the positioning mandrel;

[0010] The outer cylinder is fixedly connected to the end cap. The roller cavity is an axially recessed annular groove, and one end of the outer cylinder is embedded in the roller cavity.

[0011] Furthermore, the bottom of the rotating cavity near the central cavity is provided with a recessed reflux groove.

[0012] Furthermore, the bearing is provided with an outer ring positioning part that abuts against the inner wall of the return groove at one end.

[0013] Furthermore, the circumferential inner wall of the rotating cavity at the end away from the central cavity is provided with a mounting protrusion.

[0014] Furthermore, the rotating cavity is provided with an inner oil seal positioned on the mounting protrusion.

[0015] Furthermore, a sealing gasket is provided in the roller cavity.

[0016] Furthermore, the radial outer wall of the supporting outer cylinder is flush with the radial end face of the end cap, and a covering pad is provided on the outer side of the supporting outer cylinder.

[0017] Furthermore, a support wall is provided on the radially outer side of the support outer cylinder, which is sleeved on the outer wall of the end cap.

[0018] This utility model also provides a roller conveyor line having the electric roller end sealing structure as described above.

[0019] Compared with existing technologies, the end sealing structure of this electric drum utilizes multiple cavities with a stepped design inside the end cover to space the connection positions of the outer oil seal, bearing and supporting outer cylinder, thereby reducing the axial pressure of the outer oil seal, reducing mutual influence, and improving the overall sealing performance of the electric drum. Attached Figure Description

[0020] Figure 1 A schematic diagram of an electric drum end sealing structure provided by this utility model.

[0021] Figure 2 for Figure 1 A schematic diagram of the end cap of the electric drum end sealing structure.

[0022] Figure 3 for Figure 1 A schematic diagram of the supporting outer cylinder of the electric drum end sealing structure.

[0023] In the diagram, 10 is the end cap; 11 is the central cavity; 12 is the rotating cavity; 121 is the reflux groove; 122 is the mounting protrusion; 13 is the drum cavity; 20 is the positioning mandrel; 30 is the outer oil seal; 40 is the bearing; 41 is the outer ring positioning part; 50 is the supporting outer cylinder; 51 is the covering gasket; 52 is the supporting wall; 60 is the inner oil seal; and 70 is the sealing gasket. Detailed Implementation

[0024] Example 1, please refer to Figures 1 to 2This is a schematic diagram of an electric roller end sealing structure and a roller conveyor line provided by this utility model. The electric roller end sealing structure includes: an end cover 10, a positioning mandrel 20, a bearing 40, a supporting outer cylinder 50, etc., arranged sequentially from the inside to the outside on the end cover 10. It can be imagined that this electric roller end sealing structure also includes other functional components and specific structures, such as electrical connection components, reducers, control components, installation structures, etc., which are all technologies known to those skilled in the art, and are not involved in the electric roller end sealing structure, so they will not be described in detail here.

[0025] In this embodiment, the end cap 10 has a cylindrical structure, which has a larger space and internal load-bearing capacity compared to a flat structure. Inside the end cap 10, a central cavity 11, a rotating cavity 12, and a roller cavity 13 are arranged radially outward along the central axis in a stepped manner. That is, the axial positions of the central cavity 11, the rotating cavity 12, and the roller cavity 13 are different, and the inner diameter of the central cavity 11, the rotating cavity 12, and the roller cavity 13 increases axially.

[0026] In this embodiment, the positioning mandrel 20 is axially inserted into the end cover 10, with one end extending beyond the outside of the end cover 10. Specifically, the positioning mandrel 20 sequentially passes axially through the central cavity 11 and the rotating cavity 12. The positioning mandrel 20 can rotate relative to the end cover 10. During actual operation, the end of the positioning mandrel 20 extending beyond the end cover 10 is fixed to the conveyor frame, and the positioning mandrel 20 itself does not rotate, while the end cover 10 and the supporting outer cylinder 50 rotate relative to each other. Optimally, the outer diameter of the positioning mandrel 20 has a stepped shaft structure and maintains a suitable distance from the inner diameters of the central cavity 11 and the rotating cavity 12, facilitating stable assembly of the components.

[0027] In this embodiment, an outer oil seal 30 is fitted at the bottom of the central cavity 11 and sleeved on the outer circumferential wall of the positioning spindle 20. The outer oil seal 30 is a skeleton oil seal, which is suitable for low-speed, high-torque conveying scenarios. It is a bidirectional sealing double-lip oil seal structure, which prevents internal lubricating oil leakage and prevents external dust and moisture from entering the drum.

[0028] In this embodiment, at least one set of bearings 40 is positioned and embedded in the rotating cavity 12. The bearings 40 are sleeved on the circumferential outer wall of the positioning mandrel 20. The inner diameter of the bearings 40 is close to the inner diameter of the central cavity 11. The bearings 40 and the outer oil seal 30 are not on the same axial path, reducing the axial pressure of the outer oil seal 30. A recessed return groove 121 is provided at the bottom of the rotating cavity 12 near the central cavity 11. The return groove 121 facilitates the rapid circumferential flow of lubricating oil in the rotating cavity 12, enabling the electric roller to complete the warm-up process in a short time and improving working efficiency. When grease is used as the lubricant, the return groove 121 can also serve as a grease storage tank, providing lubrication replenishment and preventing overflow. The bearing 40 has an outer ring positioning part 41 with one end abutting against the inner wall of the return groove 121. The outer ring positioning part 41 increases the stress point of the bearing 40 and increases the installation stability of the bearing 40 itself.

[0029] A mounting protrusion 122 is provided on the circumferential inner wall of the rotating cavity 12 at the end away from the central cavity 11. The mounting protrusion 122 has an annular structure, and its protrusion height does not affect the embedded installation of the bearing 40. Specifically, the mounting protrusion 122 is a rough ground surface to increase friction or an elastic protrusion for embedding, forming a positioning mounting point at this position without affecting the installation of the bearing 40. In this embodiment, the electric roller is a permanent magnet electric roller, and an inner oil seal 60 is provided in the rotating cavity 12, which is positioned on the mounting protrusion 122 to isolate the bearing 40 from the oil passage of the permanent magnet component, avoiding mutual interference.

[0030] In other embodiments, the electric roller is an oil-immersed electric roller, and a bearing 40 can be set at the mounting protrusion 122 to increase the accuracy of the rotation of the positioning spindle 20.

[0031] In this embodiment, the outer support cylinder 50 is fixedly connected to the end cap 10. The external power source of the electric drum transmits power to the end cap 10 and the outer support cylinder 50 through a built-in reducer, forming the external support and conveying of the electric drum. Specifically, the drum cavity 13 is an axially recessed annular groove. One end of the outer support cylinder 50 is embedded in the drum cavity 13. The drum cavity 13 is an independent cavity space, and it is separated from the outside world and the rotating cavity 12. A sealing gasket 70 is provided in the drum cavity 13. The independent cavity, together with the sealing gasket 70, improves the bidirectional sealing performance of the outer side of the end cap 10.

[0032] The radial outer wall of the support outer cylinder 50 is flush with the radial end face of the end cap 10, and a covering pad 51 is provided on the outside of the support outer cylinder 50 to increase the load-bearing capacity and wear resistance of the upper end of the support outer cylinder 50.

[0033] In other embodiments, please refer to Figure 3A support wall 52 is provided on the radial outer side of the support outer cylinder 50 and sleeved on the outer wall of the end cover 10. The support wall 52 with an integral structure on the support outer cylinder 50 is used on the circumferential outer wall of the electric drum. The overall structure is compact and the load-bearing capacity is improved.

[0034] By utilizing the multiple cavities of the stepped design inside the end cap 10, the connection positions of the outer oil seal 30, bearing 40 and supporting outer cylinder 50 are spaced out, which reduces the axial pressure of the outer oil seal 30, reduces the mutual influence, and improves the overall sealing performance of the electric drum.

[0035] Example 2: This utility model also provides a roller conveyor line with the electric roller end sealing structure as described above. Except for the electric roller end sealing structure, the other structures are all existing technologies or commercially available parts.

[0036] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An end sealing structure for an electric drum, characterized in that, include: The end cap (10) has a cylindrical structure. Inside the end cap (10), a central cavity (11), a rotating cavity (12) and a roller cavity (13) are arranged radially outward along the central axis. The positioning mandrel (20) is axially inserted in the end cover (10) and one end extends out of the outside of the end cover (10). The bottom of the central cavity (11) is fitted with an outer oil seal (30) that is sleeved on the circumferential outer wall of the positioning mandrel (20). The bearing (40) has at least one set and is positioned and fitted in the rotating cavity (12), and the bearing (40) is sleeved on the circumferential outer wall of the positioning mandrel (20); The outer cylinder (50) is fixedly connected to the end cap (10), and the roller cavity (13) is an axially recessed annular groove. One end of the outer cylinder (50) is embedded in the roller cavity (13).

2. The electric drum end sealing structure according to claim 1, characterized in that, The rotating cavity (12) has a recessed reflux groove (121) at the bottom of one end near the central cavity (11).

3. The electric drum end sealing structure according to claim 2, characterized in that, The bearing (40) is provided with an outer ring positioning part (41) that abuts against the inner wall of the return groove (121) at one end.

4. The electric drum end sealing structure according to claim 1, characterized in that, The rotating cavity (12) has a mounting protrusion (122) on the circumferential inner wall at the end away from the central cavity (11).

5. The electric drum end sealing structure according to claim 4, characterized in that, The rotating cavity (12) is provided with an inner oil seal (60) positioned on the mounting protrusion (122).

6. The electric drum end sealing structure according to claim 1, characterized in that, The roller cavity (13) is provided with a sealing gasket (70).

7. The electric drum end sealing structure according to claim 6, characterized in that, The radial outer wall of the supporting outer cylinder (50) is flush with the radial end face of the end cap (10), and a covering pad (51) is provided on the outside of the supporting outer cylinder (50).

8. The electric drum end sealing structure according to claim 6, characterized in that, The outer radial side of the supporting outer cylinder (50) is provided with a supporting wall (52) that is sleeved on the outer wall of the end cap (10).

9. A roller conveyor line, characterized in that, It has the electric drum end sealing structure as described in any one of claims 1-8.

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