Oil leakage prevention device for output end of RV speed reducer and RV speed reducer
By designing an oil leakage prevention device at the output end of the RV reducer, and using an oil barrier ring to reduce contact with the oil seal, the problem of oil leakage in the traditional RV reducer is solved, and the effect of protecting the lip and shaft journal and extending the life of the reducer is achieved.
Patent Information
- Application Number
- CN202422090623.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The output end of the traditional RV reducer is caused by wear of internal impurities and movement of angular contact ball bearings, causing oil seal to bite, causing the problem of working medium leakage.
Design an oil leakage prevention device at the output end of the RV reducer, including an output frame, needle tooth shell, rotating bearing, frame oil seal and oil barrier ring. Through the setting of the oil barrier ring, the possibility of impurities contacting the oil barrier lip and mouth is reduced, and the lips and journals are protected to avoid oil leakage.
It effectively reduces the possibility that impurities in the working medium come into contact with the oil seal lip, avoids oil leakage, and extends the life of the reducer.
Smart Images
Figure CN223019352U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of speed reducers, and more specifically, to an oil leakage prevention device for the output end of an RV speed reducer and an RV speed reducer. Background Art
[0002] RV (Rotary Vector) speed reducers are widely used in industries such as industrial robots, food, and medical industries. Their oil leakage reliability is an important evaluation index. The output end of traditional RV precision speed reducers is sealed by a skeleton oil seal. A crescent surface is formed between the oil film and the air through the oil seal edge between the skeleton oil seal and the output shaft to prevent the leakage of working media.
[0003] However, after the speed reducer has been operating for a long time, due to the wear of internal components such as bearings, impurities such as iron powder are generated. Under the movement of angular contact ball bearings, the iron powder and other impurities are driven to the oil seal by the working medium, resulting in the phenomenon of the main lip edge of the oil seal being stuck. Since there is no block between the inner side of the oil seal and the angular contact ball bearing, the local pressure at the main lip edge of the oil seal is too high. After the main lip edge of the oil seal is stuck, the working medium inside the speed reducer finally leaks. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an oil leakage prevention device for the output end of an RV speed reducer and an RV speed reducer, which has a simple structure and is easy to install. It can reduce the possibility of impurities in the working medium coming into contact with the lip of the oil seal, thereby protecting the lip and the journal and avoiding oil leakage.
[0005] The embodiments of the utility model are implemented as follows:
[0006] In a first aspect, the utility model provides an oil leakage prevention device for the output end of an RV speed reducer. The oil leakage prevention device for the output end of an RV speed reducer includes an output frame, a pin gear housing, a rotating bearing, a skeleton oil seal, and an oil baffle ring.
[0007] The pin gear housing is rotatably connected to the output frame through a rotating bearing; the skeleton oil seal is connected to the pin gear housing and the output frame and is located outside the rotating bearing; the oil baffle ring is sleeved on the output frame and is located between the rotating bearing and the skeleton oil seal.
[0008] In an optional embodiment, the side of the oil baffle ring facing the rotating bearing is provided with an oil guiding arc surface.
[0009] In an optional embodiment, the outer peripheral surface of the oil baffle ring is provided with an oil slowdown groove.
[0010] In an optional embodiment, the outer peripheral surface of the oil baffle ring is provided with multiple oil slowdown grooves, and the multiple oil slowdown grooves are arranged at intervals along the axial direction of the oil baffle ring.
[0011] In an alternative embodiment, the multi-channel slow oil grooves are all facing the surface of the pin gear housing for mating with the outer ring of the rotating bearing.
[0012] In an alternative embodiment, a groove is provided on the outer peripheral surface of the output bracket, and a clamping portion engaged with the groove is provided on the inner side of the oil baffle ring.
[0013] In an alternative embodiment, along the axial direction of the output bracket, the projection of the main lip of the skeleton oil seal is located within the contour of the oil baffle ring.
[0014] In an alternative embodiment, the outer peripheral surface of the oil baffle ring is in clearance fit with the surface of the pin gear housing for mating with the outer ring of the rotating bearing;
[0015] The oil baffle ring is in clearance fit with the main lip of the skeleton oil seal.
[0016] In an alternative embodiment, the oil baffle ring is provided with a notch for disconnecting it.
[0017] In a second aspect, the present utility model provides an RV speed reducer, and the RV speed reducer includes the above-mentioned RV speed reducer output end anti-oil leakage device.
[0018] The beneficial effects of the embodiments of the present utility model include:
[0019] The RV speed reducer output end anti-oil leakage device includes an output bracket, a pin gear housing, a rotating bearing, a skeleton oil seal, and an oil baffle ring; the pin gear housing is rotatably connected to the output bracket through the rotating bearing; the skeleton oil seal is connected to the pin gear housing and the output bracket, and is located outside the rotating bearing; the oil baffle ring is sleeved on the output bracket, and the oil baffle ring is located between the rotating bearing and the skeleton oil seal. The RV speed reducer output end anti-oil leakage device has a simple structure and is easy to install. It can reduce the possibility of impurities in the working medium coming into contact with the lip of the oil seal, thereby protecting the lip and the journal and avoiding oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0021] Figure 1 It is a schematic structural diagram of the RV speed reducer output end anti-oil leakage device in the embodiments of the present utility model;
[0022] Figure 2 It is an installation schematic diagram of the oil baffle ring in the embodiments of the present utility model;
[0023] Figure 3This is a schematic structural diagram of the oil baffle ring from the first perspective in the embodiment of the present utility model;
[0024] Figure 4 This is a schematic structural diagram of the oil baffle ring from the second perspective in the embodiment of the present utility model;
[0025] Figure 5 This is a schematic structural diagram of the skeleton oil seal in the embodiment of the present utility model;
[0026] Figure 6 This is a schematic diagram of the working medium flowing at the slow oil groove in the embodiment of the present utility model.
[0027] Icons: 100 - Anti - oil - leakage device at the output end of the RV reducer; 110 - Output frame; 120 - Pin tooth housing; 130 - Rotating bearing; 140 - Skeleton oil seal; 150 - Oil baffle ring; 151 - Oil - guiding arc surface; 152 - Slow oil groove; 111 - Groove; 153 - Clamping part; 154 - Notch; 141 - Main lip; 142 - Spring cavity. Detailed implementation manners
[0028] 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 in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0029] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is habitually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0032] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0033] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0034] Please refer to Figures 1-4 , this embodiment provides an anti-oil leakage device 100 for the output end of an RV reducer. The anti-oil leakage device 100 for the output end of an RV reducer includes an output frame 110, a pin gear housing 120, a rotating bearing 130, a skeleton oil seal 140, and an oil retaining ring 150;
[0035] The pin gear housing 120 is rotatably connected to the output frame 110 through the rotating bearing 130; the skeleton oil seal 140 is connected to the pin gear housing 120 and the output frame 110 and is located outside the rotating bearing 130; the oil retaining ring 150 is sleeved on the output frame 110, and the oil retaining ring 150 is located between the rotating bearing 130 and the skeleton oil seal 140.
[0036] Among them, the rotating bearing 130 is an angular contact ball bearing or a ball bearing.
[0037] Please refer to Figures 1-4 , the working principle of the anti-oil leakage device 100 for the output end of the RV reducer is as follows:
[0038] The oil leakage prevention device 100 at the output end of the RV reducer includes an output frame 110, a pin gear housing 120, a rotating bearing 130, a skeleton oil seal 140, and an oil baffle ring 150; among them, the pin gear housing 120 is rotatably connected to the output frame 110 through the rotating bearing 130;
[0039] The skeleton oil seal 140 is connected to the pin gear housing 120 and the output frame 110, and is located outside the rotating bearing 130;
[0040] When configuring the oil baffle ring 150, it is sleeved on the output frame 110 and located between the rotating bearing 130 and the skeleton oil seal 140;
[0041] Thus, during use, the oil baffle ring 150 located between the rotating bearing 130 and the skeleton oil seal 140 can play a role in blocking oil, thereby reducing the possibility of impurities in the working medium contacting the lip of the oil seal, protecting the lip and the journal, and avoiding oil leakage; moreover, the structure of the oil baffle ring 150 is simple, which can not only reduce its manufacturing and use costs, but also simplify its installation steps, thereby improving the installation efficiency.
[0042] Furthermore, please refer to Figures 1-4 , in this embodiment, when configuring the oil baffle ring 150, an oil guiding arc surface 151 is configured on the side of the oil baffle ring 150 facing the rotating bearing 130.
[0043] Through such a setting method, it can guide the internal working medium to return oil, thereby reducing the accumulation of the working medium at the oil baffle ring 150, improving its oil return efficiency, and further being beneficial to reducing its oil return pressure, thereby being beneficial to improving its oil leakage prevention effect.
[0044] Moreover, when installing the oil baffle ring 150, on the basis of sleeving it on the output frame 110, a groove 111 can be configured on the outer peripheral surface of the output frame 110, and a clamping portion 153 that engages with the groove 111 can be configured on the inner side of the oil baffle ring 150. Thus, in this way, the oil baffle ring 150 can rotate synchronously with the output frame 110 during use. Furthermore, when the output frame 110 rotates and drives the oil baffle ring 150 to rotate, on the basis that the inner side surface of the oil baffle ring 150 is the oil guiding arc surface 151, that is, has a certain curvature, the working medium attached to the oil baffle ring 150 will be thrown back into the reducer cavity under the centrifugal action formed by the rotation, and thus, a loop can be formed in the working rotation state, thereby improving its oil leakage prevention effect.
[0045] In addition, when installing the oil baffle ring 150 into the groove 111 of the output bracket 110, to improve the installation efficiency and reduce the installation difficulty, the oil baffle ring 150 is configured with a notch 154 to disconnect it, and the oil baffle ring 150 is an elastic part. In this way, it can be conveniently and quickly assembled into the groove 111 of the output bracket 110. Moreover, in this way, the oil baffle ring 150 has no large axial movement, and when the output bracket 110 moves, it can prevent the oil baffle ring 150 from running around relative to the output bracket 110, ensuring firmness and installation stability.
[0046] Further, please refer to Figures 1-5 , based on the above structural settings, when installing the oil baffle ring 150, since it is relatively located between the skeleton oil seal 140 and the rotating bearing 130, the outer end face of the oil baffle ring 150 faces the skeleton oil seal 140, and its outer peripheral face faces the pin tooth housing 120. On the basis of installing the oil baffle ring 150 on the output bracket 110, the outer peripheral face of the oil baffle ring 150 (as shown by the mark A in Figure 3 ) can be in clearance fit with the face of the pin tooth housing 120 for mating with the outer ring of the bearing of the rotating bearing 130, and the oil baffle ring 150 (the face shown by the mark B in Figure 3 ) can be in clearance fit with the main lip 141 of the skeleton oil seal 140. In this way, the purpose is to reduce the gap between the oil baffle ring 150 and the pin tooth housing 120 and the skeleton oil seal 140. Then, on the premise of ensuring that there is no interference in the output end of the speed reducer under the action of bending moment, the gap is reduced, and the flow resistance of the working medium here is increased; in addition, the oil baffle ring 150 is in clearance fit with the main lip 141 of the skeleton oil seal 140, which can reduce the gap between the oil baffle ring 150 close to the side of the skeleton oil seal 140 on the premise of no interference under the action of the bending moment at the output end, and then can reduce the probability of the main lip 141 of the skeleton oil seal 140 contacting foreign objects;
[0047] Thus, in this way, the difficulty and resistance of the working medium flowing from the gap between the oil baffle ring 150 and the pin tooth housing 120 towards the skeleton oil seal 140 can be increased, and at the same time, the difficulty and resistance of the working medium passing through the gap between the skeleton oil seal 140 and the oil baffle ring 150 and leaking out can be increased, so as to improve the anti-oil leakage effect and further reduce the occurrence of oil leakage.
[0048] Further, please refer to Figures 1-6 , on the basis of the above clearance fit between the outer peripheral face of the oil baffle ring 150 and the pin tooth housing 120, an oil buffer groove 152 can also be provided on the outer peripheral face of the oil baffle ring 150. Through the setting of the oil buffer groove 152, during the process of the working medium leaking out through the gap between the oil baffle ring 150 and the pin tooth housing 120, through the flow of the working medium in the oil buffer groove 152 (along Figure 6in the direction shown by arrow D in the figure), so that the pressure of the working medium decreases once after passing through each groove. Therefore, the pressure will be lower and lower towards the oil seal side, reducing the compression of the cutting edge of the main lip 141; that is, it can release and reduce the kinetic energy of the working medium, and then reduce the probability of the working medium leaking out through the gap between the oil retaining ring 150 and the pin tooth housing 120, and reduce the amount of its external leakage, thereby improving and enhancing the anti-oil leakage effect.
[0049] On this basis, a plurality of oil buffering grooves 152 can be arranged on the outer peripheral surface of the oil retaining ring 150, and the plurality of oil buffering grooves 152 are arranged at intervals along the axial direction of the oil retaining ring 150, so as to improve the oil buffering effect in this way.
[0050] Moreover, when configuring the aforementioned oil buffering grooves 152, as can be seen from the above content, the present embodiment adopts a clearance fit between the outer peripheral surface of the oil retaining ring 150 and the surface of the pin tooth housing 120 for fitting with the outer ring of the rotating bearing 130. Based on this, a plurality of oil buffering grooves 152 can be made to face the surface of the pin tooth housing 120 for fitting with the outer ring of the rotating bearing 130, that is, to make the surface of the oil retaining ring 150 and the pin tooth housing 120 for fitting with the outer ring of the bearing be provided with as many oil buffering grooves 152 as possible, so as to reduce the pressure at the oil seal, thereby improving the anti-oil leakage effect.
[0051] Further, in the present embodiment, on the basis of being provided with the oil retaining ring 150, in order to reduce the amount of the working medium flowing towards the gap between the skeleton oil seal 140 and the output frame 110. Therefore, along the axial direction of the output frame 110, the projection of the main lip 141 of the skeleton oil seal 140 can be made to be located within the contour of the oil retaining ring 150, that is, in this way of setting, on the basis that the axial direction of the output frame 110 is horizontal, the outer peripheral surface of the oil retaining ring 150 (such as Figure 3 the surface marked A in the figure) is higher than the main lip 141 (such as Figure 5 the surface marked C in the figure), so as to avoid the working medium flowing towards the mating surface of the skeleton oil seal 140 and the output frame 110; and this way of setting makes the outer peripheral surface of the oil retaining ring 150 relatively higher than the outer peripheral surface of the main lip 141 of the skeleton oil seal 140. By setting like this, foreign matters can be made to enter the spring cavity 142 of the skeleton oil seal 140 first, rather than directly contacting the cutting edge of the main lip 141, thereby reducing the risk of the main lip 141 of the skeleton oil seal 140 being stuck.
[0052] As described above, please refer to Figures 1-6 , the anti-oil leakage device 100 at the output end of the RV reducer of the present utility model has the following beneficial effects:
[0053] The oil retaining ring 150 belongs to an elastic part, which is convenient for disassembly and assembly, has a simple structure, low cost, and is easy to implement; it does not change the shape and external dimensions of the reducer, and has universality and popularity;
[0054] It is elastically mounted on the output frame 110 and can rotate with the output end. Since an oil guiding arc surface 151 is arranged on the side of the oil baffle ring 150 facing the rotating bearing 130, that is, on the basis of the curved shape of the oil guiding arc surface 151, a centrifugal effect can be generated during rotation, so that the working medium is thrown back into the reducer cavity after the oil baffle ring 150 rotates, forming oil return.
[0055] The gap between the contact surface of the oil baffle ring 150 and the pin tooth housing 120 is small, reducing the entry of foreign objects into the side of the skeleton oil seal 140; and an oil buffer groove 152 is provided, so that the pressure of the working medium decreases once every time it passes through a groove. Therefore, the pressure will be lower as it flows towards the side of the skeleton oil seal 140, thereby reducing the pressure on the edge of the main lip 141.
[0056] The outer peripheral surface of the oil baffle ring 150 is relatively higher than the main lip 141 surface of the skeleton oil seal 140, so that foreign objects will preferentially enter the spring cavity 142 of the skeleton oil seal 140 instead of directly contacting the main lip 141, reducing the risk of jamming; and the gap between the surface of the oil baffle ring 150 and the skeleton oil seal 140 is small, reducing the risk of foreign objects entering the main lip 141.
[0057] Finally, the purpose of extending the service life of the reducer and reducing oil leakage accidents is achieved.
[0058] Based on the above content, please refer to Figures 1-6 In this embodiment, an RV reducer is further provided. The RV reducer includes the above-mentioned RV reducer output end anti-oil leakage device 100. By adopting the above-mentioned RV reducer output end anti-oil leakage device 100, the RV reducer can avoid oil leakage, and can also make foreign object impurities and the like flow into the spring cavity 142 of the skeleton oil seal 140 instead of directly contacting the edge of the main lip 141 of the skeleton oil seal 140, reducing the risk of jamming of the edge of the skeleton oil seal 140, thereby extending the service life of the reducer.
[0059] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. An anti-oil leakage device at the output end of an RV reducer, characterized in that: The RV reducer output end anti-leakage device includes an output frame, a pin gear housing, a rotary bearing, a skeleton oil seal and an oil retaining ring; The pin gear housing is rotatably connected to the output frame through the rotating bearing; the skeleton oil seal is connected to the pin gear housing and the output frame, and is located outside the rotating bearing; the oil retaining ring is sleeved on the output frame, and the oil retaining ring is located between the rotating bearing and the skeleton oil seal; The outer peripheral surface of the oil deflector ring is provided with a plurality of oil buffer grooves, and the plurality of oil buffer grooves are arranged at intervals along the axial direction of the oil deflector ring.
2. The RV reducer output end oil leakage prevention device according to claim 1 is characterized in that: The oil retaining ring is provided with an oil guiding arc surface on one side facing the rotary bearing.
3. The RV reducer output end oil leakage prevention device according to claim 1, characterized in that: The plurality of oil buffer grooves are all directly opposite to the surface of the pin gear housing used for matching with the bearing outer ring of the rotating bearing.
4. The RV reducer output end oil leakage prevention device according to any one of claims 1 to 3, characterized in that: The outer peripheral surface of the output frame is provided with a groove, and the inner side of the oil deflector ring is provided with a clamping portion engaged with the groove.
5. The RV reducer output end oil leakage prevention device according to any one of claims 1 to 3, characterized in that: Along the axial direction of the output frame, the projections of the main lips of the skeleton oil seal are all located within the contour of the oil deflector ring.
6. The RV reducer output end oil leakage prevention device according to any one of claims 1 to 3, characterized in that: The outer peripheral surface of the oil retaining ring and the pin gear housing are used for surface clearance matching with the bearing outer ring of the rotary bearing; The oil retaining ring is clearance-matched with the inner end surface of the main lip of the skeleton oil seal.
7. The RV reducer output end oil leakage prevention device according to any one of claims 1 to 3, characterized in that: The oil deflector ring is provided with a notch for disconnecting the oil deflector ring.
8. An RV reducer, characterized in that: The RV reducer includes an RV reducer output end oil leakage prevention device as described in any one of claims 1-7.