Speed reducer sealing mechanism and speed reducer assembly
By adopting a split housing and an integrated oil slinger ring design in the reducer, the problem of unreliable sealing structure is solved, achieving high sealing performance and low oil leakage probability, thus improving the operational stability and reliability of the equipment.
Patent Information
- Application Number
- CN202520357659.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-03-03
AI Technical Summary
The existing reducer's sealing structure is unreliable, leading to frequent oil leaks and affecting the stability of the equipment's installation and use.
The design incorporates a split housing, eccentric drive shaft, half-shaft bearing assembly, oil slinger ring, and through-cover assembly. The oil slinger ring and half-shaft bearing assembly do not overlap axially on the eccentric drive shaft, forming an integrated ring structure. The through-cover assembly connects to the split housing, creating a highly sealed structure.
It reduces the probability of oil leakage, improves the operational stability and reliability of the reducer, and reduces the failure rate and operating costs.
Smart Images
Figure CN223622164U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical transmission technology, and more specifically, to a speed reducer sealing mechanism and a speed reducer assembly. Background Technology
[0002] Roll-cutting shearing machines are used on finishing lines for thick plates to cut the top and bottom of steel plates, perform sample cutting, and cut to length. The shearing system of a length-cutting shear is complex. The mechanical parts generally include a frame, main reducer, shear blade clearance adjustment device, upper blade holder and connecting rod, lower blade holder, pressure plate device, blade box assembly, guide device, and frame rollers, etc. It is heavy equipment, making installation and disassembly difficult. Some design details are often overlooked; for example, the unreliable sealing structure at the output end of the main reducer leads to frequent oil leaks during installation and use. Utility Model Content
[0003] The purpose of this invention includes, for example, providing a speed reducer sealing mechanism and speed reducer assembly, which can reduce the probability of oil leakage, improve the stability and reliability of operation, reduce the failure rate, and reduce operating costs.
[0004] The embodiments of this utility model can be implemented as follows:
[0005] In a first aspect, this utility model provides a speed reducer sealing mechanism, comprising a split housing, an eccentric drive shaft, a half-shaft bearing assembly, an oil slinger ring, and a through-cover assembly, wherein:
[0006] The split-type housing is provided with an assembly hole, and the half-bearing assembly passes through the assembly hole. The half-bearing assembly and the split-type housing are fixed relative to each other in the axial direction of the assembly hole. The eccentric drive shaft passes through the space enclosed by the half-bearing assembly. The oil slinger is sleeved on the outside of the eccentric drive shaft. The oil slinger and the half-bearing assembly do not overlap in the axial direction of the eccentric drive shaft. The oil slinger and the eccentric drive shaft are fixed relative to each other in the circumferential direction of the eccentric drive shaft. The through cover assembly is installed on the split-type housing and sleeved on the outside of the oil slinger.
[0007] In an optional embodiment, the split housing has a first side and a second side that are axially opposite to each other in the mounting hole, one end of the eccentric drive shaft extends out of the second side; the second side is provided with a clearance groove, one side of the half-shaft bearing assembly is engaged in the clearance groove; the through cover assembly is fixed to the second side.
[0008] In an optional embodiment, a first sealing ring is provided between the cover assembly and the second side.
[0009] In an optional embodiment, the through cover assembly includes an upper through cover and a lower through cover. The upper through cover is provided with a first groove, and the lower through cover is provided with a second groove. Both the upper through cover and the lower through cover are fixedly connected to the split-type box body. The groove openings of the first groove and the groove openings of the second groove are joined to form an oil guide hole. A portion of the oil slinger ring passes through the oil guide hole.
[0010] In an optional embodiment, a first oil guide groove is provided on the groove wall of the first groove; or / and, a second oil guide groove is provided on the outer peripheral surface of the oil slinger ring, the second oil guide groove being located inside the oil guide hole.
[0011] In an optional embodiment, the oil slinger includes a first ring and a second ring of integral structure. Both the first ring and the second ring are sleeved on the outside of the eccentric drive shaft. The first ring passes through the oil guide hole, and the second ring is located on the side of the first ring away from the cover assembly. A second sealing ring is provided between the first ring and the eccentric drive shaft. Both the first ring and the second ring are fixed relative to the eccentric drive shaft in the circumferential direction.
[0012] In an optional embodiment, the eccentric drive shaft is provided with an eccentric portion that extends out of the split housing; the second ring body is fitted and fixedly connected to the end face of the eccentric portion near the split housing.
[0013] In an optional embodiment, the split housing is provided with a lubricating oil channel; the bearing assembly is provided with a lubrication hole, and the lubricating oil channel is connected to the lubrication hole.
[0014] In an optional embodiment, the split-type housing is provided with an oil return pipe, one end of which is connected to the interior of the split-type housing, and the other end is connected to the transparent cover assembly.
[0015] Secondly, this utility model provides a speed reducer assembly, the speed reducer assembly comprising:
[0016] The speed reducer sealing mechanism described in any of the foregoing embodiments.
[0017] The beneficial effects of this utility model embodiment include, for example:
[0018] In summary, the reducer sealing mechanism provided in this embodiment, by setting the oil slinger ring and the half-shaft assembly to not overlap axially on the eccentric drive shaft, that is, the distance between the end face of the oil slinger ring and the end face of the half-shaft assembly on the axial direction of the output rear shaft is zero or greater than zero, allows for efficient assembly of the reducer sealing mechanism. During assembly, the oil slinger ring can be first fitted onto the eccentric drive shaft, and then the split housing with the half-shaft assembly installed can be closed radially towards the eccentric drive shaft, allowing the half-shaft assembly to enclose the eccentric drive shaft. In this way, the oil slinger ring can be configured as a one-piece annular structure, which, compared to the existing structure of two half-oil slinger rings joined together, reduces the splicing gap, improves sealing performance, and reduces the probability of oil leakage. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the speed reducer sealing mechanism according to an embodiment of this application;
[0021] Figure 2 This is a partial schematic diagram from a first-view perspective of the speed reducer sealing mechanism according to an embodiment of this application;
[0022] Figure 3 This is a partial schematic diagram from a second perspective of the speed reducer sealing mechanism according to an embodiment of this application;
[0023] Figure 4 for Figure 3 A magnified view of a portion of the image.
[0024] icon:
[0025] 100-Split housing; 101-First side; 102-Second side; 110-Upper housing; 120-Lower housing; 130-Allowing groove; 140-Lubricating oil passage; 150-Return oil pipe; 200-Eccentric drive shaft; 210-Eccentric part; 300-First half-shaft bearing; 310-Second half-shaft bearing; 320-Lubrication hole; 400-Oil slinger ring; 410-First ring body; 411-Second oil guide groove; 420-Second ring body; 430-Second sealing ring; 500-Upper transparent cover; 501-First oil guide groove; 510-Lower transparent cover; 520-First sealing ring. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0029] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0030] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0031] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0032] In the prior art, the half-bearing body and the two semi-oil slingers 400 of the reducer sealing mechanism partially overlap axially on the eccentric drive shaft 200, with the half-bearing body located inside the semi-oil slingers 400. Therefore, if the two semi-oil slingers 400 were designed as a single unit, the single-unit oil slinger 400 would first need to be fitted onto the outside of the eccentric drive shaft 200. Then, the half-bearing body would need to be radially closed from the outside of the oil slingers 400 onto the outside of the eccentric drive shaft 200. Because the oil slingers 400 obstruct the half-bearing body, it cannot properly hold the eccentric drive shaft 200, resulting in the reducer sealing mechanism failing to assemble correctly. Therefore, the existing oil slinger structure can only be designed as a structure with two separate semi-oil slingers 400 that work together. First, the half-bearing body is assembled onto the outside of the eccentric drive shaft 200, and then the two semi-oil slingers 400 are radially installed onto the outside of the eccentric drive shaft 200. Because the two half-oil slingers are spliced together at 400mm, there is a seam, resulting in poor sealing and a high probability of oil leakage.
[0033] In view of this, the designers have provided a gearbox sealing mechanism that can reduce the probability of oil leakage and improve the stability and reliability of operation.
[0034] Please refer to Figures 1-4 This embodiment provides a speed reducer sealing mechanism, including a split housing 100, an eccentric drive shaft 200, a half-bearing assembly, an oil slinger ring 400, and a cover assembly. The split housing 100 is provided with an assembly hole, and the half-bearing assembly passes through the assembly hole. The half-bearing assembly and the split housing 100 are axially fixed relative to each other in the assembly hole. The eccentric drive shaft 200 passes through the space enclosed by the half-bearing assembly. The oil slinger ring 400 is sleeved on the outside of the eccentric drive shaft 200. The oil slinger ring 400 and the half-bearing assembly do not overlap axially in the eccentric drive shaft 200. The oil slinger ring 400 and the eccentric drive shaft 200 are circumferentially fixed relative to each other in the eccentric drive shaft 200. The cover assembly is installed on the split housing 100 and sleeved on the outside of the oil slinger ring 400.
[0035] As described above, the assembly method of the reducer sealing mechanism provided in this embodiment is as follows:
[0036] First, the oil slinger ring 400 can be fitted onto the eccentric drive shaft 200, and the gears and other components on the eccentric drive shaft 200 can be installed. A section of the shaft for installing the half-shaft bearing assembly can be reserved axially on the eccentric drive shaft 200. Then, using hoisting equipment, the split-type housing 100 can be moved radially towards the eccentric drive shaft 200 from both the upper and lower sides. The half-shaft bearing assembly is already assembled on the split-type housing 100. As the split-type housing 100 gradually approaches the eccentric drive shaft 200, and the half-shaft bearing assembly and oil slinger ring 400 do not overlap axially and are not blocked by the oil slinger ring 400, there will be no interference, allowing the half-shaft bearing assembly to smoothly hold the eccentric drive shaft 200, completing the assembly. Thus, setting the oil slinger ring 400 as an integrated ring component will not affect the assembly of the reducer sealing mechanism. Furthermore, the integrated oil slinger ring 400 has no seams, resulting in fewer oil leakage points and a lower probability of oil leakage. In addition, the integrated oil slinger ring 400 has high structural strength and high assembly efficiency.
[0037] The following embodiments illustrate the details of the reducer sealing mechanism of this application by way of example.
[0038] Please refer to Figure 1 In this embodiment, optionally, the split-type housing 100 includes an upper housing 110 and a lower housing 120. The upper housing 110 and the lower housing 120 can be fixedly connected by structural components such as bolts, forming an assembly hole after connection. Furthermore, the split-type housing 100 has a first side 101 and a second side 102 spaced apart axially from the assembly hole. The first side 101 of the upper housing 110 and the first side 101 of the lower housing 120 are located on the same side, and correspondingly, the second side 102 of the upper housing 110 and the second side 102 of the lower housing 120 are located on the same side. For ease of description, the first side 101 is the inner side of the split-type housing 100, and the second side 102 is the outer side of the split-type housing 100.
[0039] Please refer to Figure 3 and Figure 4 Optionally, the second side 102 of both the upper housing 110 and the lower housing 120 is provided with a relief groove 130. Due to the design of the relief groove 130, the thickness of the split housing 100 corresponding to the position of the relief groove 130 can be reduced. The thickness direction of the split housing 100 is the axial direction of the mounting hole. When the thickness of the split housing 100 is reduced, the axial dimension of the half bearing assembly can be reduced, so that the half bearing assembly and the oil slinger ring 400 do not coincide in the axial direction of the eccentric drive shaft 200.
[0040] Please refer to Figure 2 and Figure 3In addition, both the upper housing 110 and the lower housing 120 are provided with lubricating oil channels 140, which can guide lubricating oil to the half-bearing assembly for effective lubrication. The lower housing 120 is also provided with an oil return pipe 150, one end of which is connected to the interior of the split housing 100, and the other end is connected to the cover assembly, which can guide the lubricating oil accumulated at the cover assembly back to the interior of the split housing 100.
[0041] Please refer to Figure 1 In this embodiment, optionally, the half-shaft bearing assembly includes a first half-shaft bearing 300 and a second half-shaft bearing 310. Both the first half-shaft bearing 300 and the second half-shaft bearing 310 are located within the mounting hole. The first half-shaft bearing 300 is snapped onto the upper housing 110, and the second half-shaft bearing 310 is snapped onto the lower housing 120. A portion of the first half-shaft bearing 300 is located within the clearance groove 130 on the upper housing 110, and the second half-shaft bearing 310 is located within the clearance groove 130 on the lower housing 120. Due to the design of the clearance groove 130, when the first half-shaft bearing 300 and the second half-shaft bearing 310 are snapped into the split housing 100, the axial dimensions of the first half-shaft bearing 300 and the second half-shaft bearing 310 can be reduced, thereby ensuring that the sides of the first half-shaft bearing 300 and the second half-shaft bearing 310 near the second side 102 do not overlap with the sides of the oil slinger ring 400 in the axial direction of the eccentric drive shaft 200.
[0042] It should be understood that the first half-shaft bearing 300 and the second half-shaft bearing 310 are fixed on the split housing 100, and are fixed relative to the split housing 100 in both the radial and axial directions of the assembly hole.
[0043] Please refer to Figure 1 and Figure 4 Meanwhile, lubrication holes 320 can be provided on both the first half-bearing shell 300 and the second half-bearing shell 310. The lubricating oil channel 140 on the split housing 100 is connected to the lubrication hole 320, which can improve the lubrication efficiency of the half-bearing shell assembly.
[0044] In this embodiment, optionally, an eccentric portion 210 is provided on the outer peripheral surface of the eccentric drive shaft 200, and the outer diameter of the eccentric portion 210 is larger than the outer diameter of other positions. The eccentric drive shaft 200 passes through the space enclosed by the first half-shaft bearing 300 and the second half-shaft bearing 310. The eccentric portion 210 of the eccentric drive shaft 200 is located outside the split housing 100, that is, the eccentric portion 210 is located outside the second side 102 and has a distance from the second side 102 to provide installation space for the oil slinger ring 400 and the through cover assembly.
[0045] In this embodiment, optionally, the through cover assembly includes an upper through cover 500 and a lower through cover 510. The upper through cover 500 is provided with a first groove, and the lower through cover 510 is provided with a second groove. The upper through cover 500 is attached to the second side 102 and fixedly connected to the upper housing 110, and the lower through cover 510 is attached to the second side 102 and fixedly connected to the lower housing 120. The groove opening of the first groove and the groove opening of the second groove are joined to form an oil guide hole.
[0046] It should be understood that the upper cover 500 and the lower cover 510 can be fixedly connected to the split-type housing 100 by bolts or other structural components. The cover assembly is designed as a split structure for easy installation.
[0047] Please combine Figure 4 Optionally, the output shaft is fitted with a first sealing ring 520. The upper cover 500 and the upper housing 110, as well as the lower cover 510 and the lower housing 120, are sealed by the first sealing ring 520, which can improve the sealing performance of the connection between the cover assembly and the split housing 100 and reduce the risk of oil leakage.
[0048] Optionally, a first oil guide groove 501 is provided on the groove wall of the first groove or the second groove. The first oil guide groove 501 can increase the oil capacity and reduce the probability of oil leakage.
[0049] Meanwhile, the oil return pipe 150 on the split housing 100 is connected to the lower cover 510. The oil return pipe 150 is connected to the oil guide hole, and the lubricating oil can return from the oil return pipe 150 to the split housing 100 under the action of gravity.
[0050] Please combine Figure 1 and Figure 4 In this embodiment, optionally, the oil slinger ring 400 includes a first ring body 410 and a second ring body 420 with an integral structure. Both the first ring body 410 and the second ring body 420 are sleeved on the outside of the eccentric drive shaft 200. The first ring body 410 is located on the side of the second ring body 420 closer to the second side 102, that is, the second ring body 420 is located on the side of the first ring body 410 away from the second side 102. At the same time, the first ring body 410 and the eccentric drive shaft 200 can be connected by a spline, and the second ring body 420 fits against the side of the eccentric part 210 close to the second side 102. The second ring body 420 can be fixed to the eccentric part 210 by bolts or the like, so that the first ring body 410 and the second ring body 420 are relatively fixed to the eccentric drive shaft 200 in the circumferential direction of the eccentric drive shaft 200, and the connection is firm and reliable. When the eccentric output shaft rotates, it can drive the oil slinger ring 400 to rotate stably together.
[0051] Optionally, a second sealing ring 430 is provided between the first ring body 410 and the eccentric drive shaft 200, which provides high sealing performance between the first ring body 410 and the eccentric drive shaft 200 and prevents oil leakage.
[0052] Furthermore, a second oil guide groove 411 may be provided on the outer peripheral surface of the first ring body 410. In some embodiments, the first oil guide groove 501 may be provided only on the upper transparent cover 500, or the second oil guide groove 411 may be provided only on the outer peripheral surface of the first ring body 410, etc.
[0053] It should be understood that when the cover assembly is installed in the split housing 100, part of the first ring 410 is inserted into the oil guide hole. The oil leaking from the end of the half bearing assembly enters the oil guide hole. Under the rotation of the first ring 410, the oil is not easy to leak, and the oil accumulates in the oil guide hole. It can also be discharged into the split housing 100 through the return oil pipe 150 to participate in lubrication again.
[0054] In other embodiments, optionally, the shaft segment on which the first ring body 410 is fixed on the output shaft can be lengthened, so that more space is reserved on the output shaft to install the first ring body 410, thereby increasing the axial distance between the first ring body 410 and the half-shaft assembly on the output shaft, ensuring that the first ring body 410 and the half-shaft assembly do not overlap in the axial direction.
[0055] The reducer sealing mechanism provided in this embodiment, by setting the oil slinger ring 400 and the half-shaft bearing assembly to not overlap axially on the eccentric drive shaft 200, allows for easy assembly of the reducer sealing mechanism. First, the oil slinger ring 400 is fitted onto the eccentric drive shaft 200. Then, the split housing 100, on which the half-shaft bearing assembly is installed, is closed radially towards the eccentric drive shaft 200, causing the half-shaft bearing assembly to enclose the eccentric drive shaft 200. In this way, the oil slinger ring 400 can be configured as a one-piece annular structure. Compared to the existing structure of two half-oil slinger rings 400 joined together, this reduces the joint gap, improves sealing performance, and lowers the probability of oil leakage.
[0056] This embodiment also provides a speed reducer assembly, including the speed reducer sealing mechanism of the above embodiment, which has advantages such as high sealing performance and low risk of oil leakage.
[0057] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A speed reducer sealing mechanism, characterized in that, Includes a split housing (100), an eccentric drive shaft (200), a half-shaft bearing assembly, an oil slinger ring (400), and a cover assembly, wherein: The split housing (100) is provided with an assembly hole, and the half-bearing assembly passes through the assembly hole. The half-bearing assembly and the split housing (100) are fixed relative to each other in the axial direction of the assembly hole. The eccentric drive shaft (200) passes through the space enclosed by the half-bearing assembly. The oil slinger ring (400) is sleeved on the outside of the eccentric drive shaft (200). The oil slinger ring (400) and the half-bearing assembly do not overlap in the axial direction of the eccentric drive shaft (200). The oil slinger ring (400) and the eccentric drive shaft (200) are fixed relative to each other in the circumferential direction of the eccentric drive shaft (200). The through cover assembly is installed on the split housing (100) and sleeved on the outside of the oil slinger ring (400).
2. The reducer sealing mechanism according to claim 1, characterized in that: The split-type housing (100) has a first side (101) and a second side (102) that are axially opposite to each other in the mounting hole. One end of the eccentric drive shaft (200) extends out of the second side (102). The second side (102) is provided with a relief groove (130), and one side of the half-shaft bearing assembly is engaged in the relief groove (130). The through cover assembly is fixed to the second side (102).
3. The reducer sealing mechanism according to claim 2, characterized in that: A first sealing ring (520) is provided between the cover assembly and the second side (102).
4. The reducer sealing mechanism according to claim 1, characterized in that: The transparent cover assembly includes an upper transparent cover (500) and a lower transparent cover (510). The upper transparent cover (500) is provided with a first groove, and the lower transparent cover (510) is provided with a second groove. Both the upper transparent cover (500) and the lower transparent cover (510) are fixedly connected to the split-type housing (100). The groove opening of the first groove and the groove opening of the second groove are joined to form an oil guide hole. A portion of the oil slinger ring passes through the oil guide hole.
5. The reducer sealing mechanism according to claim 4, characterized in that: The first groove is provided with a first oil guide groove (501) on its groove wall; or / and the outer peripheral surface of the oil slinger ring (400) is provided with a second oil guide groove (411), the second oil guide groove (411) being located inside the oil guide hole.
6. The reducer sealing mechanism according to claim 4, characterized in that: The oil slinger includes a first ring (410) and a second ring (420) of integral structure. Both the first ring (410) and the second ring (420) are sleeved on the outside of the eccentric drive shaft (200). The first ring (410) passes through the oil guide hole, and the second ring (420) is located on the side of the first ring (410) away from the cover assembly. A second sealing ring (430) is provided between the first ring (410) and the eccentric drive shaft (200). Both the first ring (410) and the second ring (420) are fixed relative to the eccentric drive shaft (200) in the circumferential direction.
7. The reducer sealing mechanism according to claim 6, characterized in that: The eccentric drive shaft (200) is provided with an eccentric part (210) that extends out of the split housing (100); the second ring (420) is fitted and fixedly connected to the end face of the eccentric part (210) near the split housing (100).
8. The reducer sealing mechanism according to claim 1, characterized in that: The split housing (100) is provided with a lubricating oil channel (140); the bearing assembly is provided with a lubrication hole (320), and the lubricating oil channel (140) is connected to the lubrication hole (320).
9. The reducer sealing mechanism according to claim 1, characterized in that: The split-type housing (100) is provided with an oil return pipe (150), one end of which is connected to the interior of the split-type housing (100), and the other end is connected to the transparent cover assembly.
10. A speed reducer assembly, characterized in that, The speed reducer assembly includes: The speed reducer sealing mechanism according to any one of claims 1-9.