Oil leakage prevention RV speed reducer
By setting intercepting grooves on the needle tooth shell and output rack of the RV reducer, a maze structure is formed, which solves the problem of oil leakage in heavy load and heavy pollution environments, and improves the sealing and service life.
Patent Information
- Application Number
- CN202422249815.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-13
AI Technical Summary
Existing RV reducers are prone to oil leakage in heavy load and heavy pollution environments, resulting in failure of oil seals and shortening their service life.
Setting recesses on the needle tooth shell and output rack to form a maze structure to block lubricating oil and impurities, reducing the risk of wear and damage to the skeleton oil seal.
It reduces the leakage probability and wear probability of the skeleton oil seal, improves the sealing property, and extends the service life of the reducer.
Smart Images
Figure CN223164978U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of gearboxes, and in particular to an oil leakage prevention RV reduction device. Background Technique
[0002] The RV reducer is a core component of industrial robots. When the robot is applied in environments such as heavy load and heavy pollution, higher requirements are placed on the service life of the RV reducer. In such working conditions, oil leakage is often one of the main forms of reducer failure. Currently, the design of RV reducers does not take into account such harsh operating conditions. For example, in the gear device disclosed in patent document CN105736639, only a skeleton oil seal is installed on the rotating outer circle of the pin tooth housing and the output frame to achieve the effects of sealing and preventing oil leakage. However, when the RV reducer runs in under heavy load, fine iron filings will be generated. During the operation of the reducer, the iron filings will reach the lip of the oil seal along with the lubricating oil or grease, causing lip scratches; in addition, in a heavily polluted environment, external fine and sharp particles will also reach the lip of the oil seal along the outer circle of the output frame, causing lip scratches; in more severe working conditions, the internal pressure of the reducer will increase due to temperature rise, resulting in the outward protrusion and deflection of the oil seal. All these situations will cause the oil seal to fail, thereby increasing the risk of early oil leakage of the reducer, increasing the failure rate of the reducer, and shortening the service life of the reducer. Content of the Utility Model
[0003] The purpose of the utility model is to provide an oil leakage prevention RV reduction device, which can reduce the failure probability of the skeleton oil seal, improve the sealing performance of the skeleton oil seal, thereby reducing the failure rate of the reducer and extending the service life of the reducer.
[0004] The embodiments of the utility model are implemented as follows:
[0005] In a first aspect, the utility model provides an oil leakage prevention RV reduction device, including:
[0006] An RV transmission mechanism, an output frame, and a skeleton oil seal; the RV transmission mechanism includes a pin tooth housing, the output frame is rotatably installed inside the pin tooth housing, and the skeleton oil seal is installed between the pin tooth housing and the output frame; at least one of the pin tooth housing and the output frame is provided with a retention groove, and the retention groove is located on the side of the skeleton oil seal close to the inside of the pin tooth housing.
[0007] In an optional embodiment, the output frame includes a first shaft section and a second shaft section connected to each other. The outer diameter of the second shaft section is greater than that of the first shaft section. One end of the second shaft section where the first shaft section is located has an annular surface surrounding the first shaft section, and the retention groove is provided on the annular surface; the first shaft section is rotatably installed inside the pin tooth housing, and the skeleton oil seal is provided between the pin tooth housing and the second shaft section.
[0008] Based on the above solution, due to the structural design of the annular surface, before the lubricating oil flowing inside the pin gear housing reaches the skeleton oil seal, it is first blocked by the annular surface. Firstly, it can reduce the amount of lubricating oil reaching the skeleton oil seal. Secondly, it can make the lubricating oil enter the interception groove better, so that impurities such as iron filings carried in the lubricating oil are deposited in the interception groove, reducing the iron filings entering the skeleton oil seal and lowering the risk of the skeleton oil seal being worn and scratched.
[0009] In an alternative embodiment, the output bracket further includes a shoulder sleeved on the outer peripheral surface of the second shaft section. A receiving groove is provided on the inner wall surface of the pin gear housing, and the shoulder is inserted into the receiving groove; the interception groove is located on the side of the shoulder away from the skeleton oil seal.
[0010] Based on the above solution, by setting the shoulder, the blocking area of the output bracket in its radial direction is further increased, and more lubricating oil can be blocked. Moreover, the shoulder, the receiving groove and the interception groove cooperate to form a sealing system similar to a labyrinth structure, increasing the difficulty for the lubricating oil to move to the skeleton oil seal, reducing the impact on the skeleton oil seal, having a good sealing effect and being not easily damaged.
[0011] In an alternative embodiment, the interception groove is provided on the inner wall surface of the pin gear housing.
[0012] Based on the above solution, when the lubricating oil flows inside the pin gear housing, part of the lubricating oil has a certain centrifugal force as the output bracket and other components rotate. This part of the lubricating oil moves towards the inner wall surface of the pin gear housing and can be blocked by the interception groove, so that impurities such as iron filings carried in the lubricating oil are deposited in the interception groove, reducing the impurities moving to the skeleton oil seal.
[0013] In an alternative embodiment, the interception groove is arranged as an annular groove surrounding the axis of the output bracket.
[0014] Based on the above solution, the interception groove has a large volume and strong accommodation capacity, can block more lubricating oil, and can intercept more impurities such as iron filings.
[0015] In an alternative embodiment, the groove depth directions of the interception groove on the pin gear housing and the interception groove on the output bracket have an included angle.
[0016] Based on the above solution, by providing interception grooves on both the pin gear housing and the output bracket, the interception grooves have a wide distribution area, large volume, strong accommodation capacity and strong blocking ability. Moreover, the lubricating oil has velocities in all directions under the agitation of components such as the output bracket. When the lubricating oil in different directions flows towards the skeleton oil seal, it can be blocked by the corresponding interception grooves, and the amount of lubricating oil reaching the skeleton oil seal is small, thereby reducing impurities such as iron filings reaching the skeleton oil seal.
[0017] In an alternative embodiment, a magnet is provided on the output bracket, and the magnet is used to magnetically attract the metal substances located in the intercepting groove.
[0018] Based on the above solution, some metal substances can be adsorbed by the magnet, further reducing the iron filings and impurities reaching the skeleton oil seal along with the lubricating oil.
[0019] In an alternative embodiment, the RV transmission mechanism further includes a support bearing. The pin tooth housing and the output bracket are rotatably engaged through the support bearing, and the support bearing is located on the side of the intercepting groove away from the skeleton oil seal.
[0020] Based on the above solution, the lubricating oil can normally lubricate the support bearing. When the lubricating oil after lubricating the support bearing moves towards the skeleton oil seal, it is blocked by the intercepting groove, reducing the lubricating oil reaching the skeleton oil seal.
[0021] In an alternative embodiment, the anti-oil-leakage RV reduction device further includes a baffle. The baffle is sleeved outside the output bracket, and the baffle is located on the side of the skeleton oil seal away from the intercepting groove.
[0022] Based on the above solution, when impurities in the external environment move towards the skeleton oil seal, they are blocked by the baffle, thereby reducing the risk of damage to the skeleton oil seal by external impurities.
[0023] In an alternative embodiment, the baffle includes an annular body and a plurality of mounting blocks. The plurality of mounting blocks are all fixed on the annular body and are arranged at intervals in the circumferential direction of the annular body; a plurality of mounting grooves are provided on the output end face of the output bracket, and the plurality of mounting blocks are respectively embedded into the plurality of mounting grooves one by one, and the annular body is sleeved outside the output bracket.
[0024] Based on the above solution, through the cooperation of the mounting blocks and the mounting grooves, the annular body can be closer to the outside of the skeleton oil seal, playing a role in restricting the displacement of the outside of the skeleton oil seal. The skeleton oil seal is not easily convex and fails, and has a long service life. That is, the annular body not only plays a role in restricting external impurities from reaching the skeleton oil seal, but also plays a role in preventing the skeleton oil seal from protruding and deforming.
[0025] The beneficial effects of the embodiments of the present utility model are:
[0026] In summary, for the anti-oil-leakage RV reduction gear provided in this embodiment, by providing an intercepting groove on at least one of the pin tooth housing and the output frame, during the operation of the RV reduction gear, when the lubricating oil flowing in the pin tooth housing moves towards the skeleton oil seal, the lubricating oil needs to pass through the intercepting groove first. The lubricating oil can be stored in the intercepting groove, reducing the lubricating oil reaching the skeleton oil seal, reducing the working load of the skeleton oil seal, and lowering the leakage probability of the lubricating oil at the skeleton oil seal. At the same time, the intercepting groove can also intercept impurities such as iron filings moving together with the lubricating oil, thereby reducing the iron filings and other impurities reaching the skeleton oil seal, and further reducing the probability of the skeleton oil seal being worn and scratched. It is estimated that the service life of the oil seal is long and the use is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore 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.
[0028] Figure 1 Schematic diagram of the anti-oil-leakage RV reduction gear according to the embodiment of the present invention;
[0029] Figure 2 Cross-sectional view of the anti-oil-leakage RV reduction gear according to the embodiment of the present invention in the A-A direction;
[0030] Figure 3 Enlarged schematic view of part B of the anti-oil-leakage RV reduction gear according to the embodiment of the present invention;
[0031] Figure 4 Schematic diagram of the pin tooth housing according to the embodiment of the present invention;
[0032] Figure 5 Schematic diagram of one perspective of the output frame according to the embodiment of the present invention;
[0033] Figure 6 Schematic diagram of another perspective of the output frame according to the embodiment of the present invention;
[0034] Figure 7 Schematic diagram of the baffle according to the embodiment of the present invention.
[0035] Reference Signs:
[0036] 100 - RV drive mechanism; 110 - pin gear housing; 111 - first end; 112 - second end; 113 - receiving groove; 114 - first intercepting groove; 115 - pin gear body; 120 - upper swing gear; 130 - lower swing gear; 140 - crankshaft; 141 - crank portion; 142 - coaxial portion; 150 - planetary gear; 160 - support flange; 170 - bolt; 180 - taper pin; 190 - first support bearing; 191 - second support bearing; 192 - first bearing; 193 - second bearing; 200 - output bracket; 210 - first shaft section; 220 - second shaft section; 221 - second intercepting groove; 222 - mounting groove; 230 - shoulder; 240 - connecting stud; 300 - skeleton oil seal; 400 - baffle plate; 410 - annular body; 420 - mounting block; 500 - fastener. Detailed implementation mode
[0037] 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 part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.
[0038] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0039] It should be noted that similar reference numerals and letters indicate 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.
[0040] 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 accompanying drawings, or the orientation or positional relationship in which the utility model product is usually 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 should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.
[0041] In addition, terms such as "horizontal" and "vertical" do not require the components 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.
[0042] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" 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 components. 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.
[0043] In the prior art, due to the complex operating conditions of the RV reducer, the iron filings carried in the internal lubricating oil during operation reach the skeleton oil seal 300, which is likely to cause friction with the skeleton oil seal 300, scratch the skeleton oil seal 300, and cause the sealing failure of the skeleton oil seal 300. In addition, the small and sharp impurities in the external environment will also reach the lip of the oil seal along the outer circle of the output frame 200, causing lip scratches and affecting the service life of the skeleton oil seal 300.
[0044] In view of this, the designer provides an RV reduction device, which can reduce the failure probability of the skeleton oil seal 300, improve the sealing performance of the skeleton oil seal 300, thereby reducing the failure rate of the reducer and extending the service life of the reducer.
[0045] Please combine Figures 1-7 In this embodiment, the oil leakage prevention RV reduction device includes an RV transmission mechanism 100, an output frame 200, and a skeleton oil seal 300. The RV transmission mechanism includes a pin gear housing 110. The output frame 200 is rotatably installed inside the pin gear housing 110, and the skeleton oil seal 300 is installed between the pin gear housing 110 and the output frame 200; at least one of the pin gear housing 110 and the output frame 200 is provided with a retention groove, and the retention groove is located on the side of the skeleton oil seal 300 close to the inside of the pin gear housing 110.
[0046] Continuing from the above, the working mode of the oil leakage prevention RV reduction device provided in this embodiment is as follows:
[0047] The RV transmission mechanism 100 outputs torque to the output frame 200. The output frame 200 is connected to an external actuator, driving the actuator to rotate to achieve the output after power adjustment. In the structural design of this RV reduction gear, by providing an intercepting groove on at least one of the pin tooth housing 110 and the output frame 200, during the operation of the RV reduction gear, when the lubricating oil flowing in the pin tooth housing 110 moves towards the skeleton oil seal 300, the lubricating oil needs to pass through the intercepting groove first. The lubricating oil can be stored in the intercepting groove, reducing the lubricating oil reaching the skeleton oil seal 300, reducing the working load of the skeleton oil seal 300, and reducing the leakage probability of the lubricating oil at the skeleton oil seal 300. At the same time, the intercepting groove can also intercept impurities such as iron filings moving together with the lubricating oil, thereby reducing the iron filings and other impurities reaching the skeleton oil seal 300, and further reducing the probability of the skeleton oil seal 300 being worn and scratched. It is estimated that the service life of the oil seal is long and the use is stable and reliable.
[0048] The following embodiments will illustrate the details of the oil leakage prevention RV reduction gear provided by the present application by way of examples.
[0049] Please refer to Figures 1-3 In this embodiment, optionally, the oil leakage prevention RV reduction gear includes an RV transmission mechanism 100, an output frame 200, a skeleton oil seal 300, a baffle 400, and a fastener 500. The RV transmission mechanism 100 is in transmission cooperation with the output frame 200 and is used to output the torque adjusted from the output frame 200. The skeleton oil seal 300 is used to seal the gap between the output frame 200 and the RV transmission mechanism. The baffle 400 is arranged outside the skeleton oil seal 300, which can prevent external impurities from reaching the skeleton oil seal 300 and can also limit the outward convex deformation of the skeleton oil seal 300. The fastener 500 fixes the baffle 400 on the output end face of the output frame 200.
[0050] Please refer to Figure 1 and Figure 2, in this embodiment, optionally, the RV transmission mechanism 100 includes a pin gear housing 110, a pin gear body 115, an upper swing gear 120, a lower swing gear 130, a crankshaft 140, a planetary gear 150, a support flange 160, bolts 170, taper pins 180, a first support bearing 190, a second support bearing 191, a first bearing 192, and a second bearing 193. The pin gear housing 110 has a first end 111 and a second end 112 in the axial extension direction thereof. The output frame 200 is rotatably mounted in the pin gear housing 110 through the first support bearing 190. The support flange 160 is rotatably mounted in the pin gear housing 110 through the second support bearing 191. The output frame 200 is disposed near the first end 111, and the support flange 160 is disposed near the second end 112. The output frame 200 and the support flange 160 are fixedly connected by bolts 170 and taper pins 180. The bolts 170 limit the axial displacement of the output frame 200 and the support flange 160, and the taper pins 180 limit the radial displacement of the output frame 200 and the support flange 160. Among them, the number of bolts 170 and taper pins 180 can be set as required. The number of pin gear bodies 115 is multiple and can be set as required. The multiple pin gear bodies 115 are all installed in multiple pin gear grooves on the inner wall surface of the pin gear housing 110, and the multiple pin gear bodies 115 are located between the first support bearing 190 and the second support bearing 191. The upper swing gear 120 and the lower swing gear 130 are disposed in the pin gear housing 110 and are both meshed with the multiple pin gear bodies 115. The upper swing gear 120 is disposed near the first end 111, and the lower swing gear 130 is disposed near the second end 112. The output frame 200 penetrates through the upper swing gear 120 and the lower swing gear 130 at the same time. The number of crankshafts 140 and planetary gears 150 is equal and can both be set to three. The three planetary gears 150 are respectively installed on the three crankshafts 140. It should be understood that the installation method of each crankshaft 140 is the same. In this embodiment, the installation of one crankshaft 140 is taken as an example for description.
[0051] Among them, the crankshaft 140 includes two integral coaxial portions 142 and two crank portions 141. The two crank portions 141 are eccentrically arranged and located between the two coaxial portions 142. The crankshaft 140 penetrates through the output bracket 200, the upper swing gear 120, the lower swing gear 130, and the support flange 160 at the same time. The two crank portions 141 are respectively rotatably engaged with the upper swing gear 120 and the lower swing gear 130 through two first bearings 192. The two coaxial portions 142 are respectively rotatably engaged with the support flange 160 and the output bracket 200 through two second bearings 193. The coaxial portion 142 of the crankshaft 140 corresponding to the second end 112 extends out of the pin tooth housing 110, and it can be fixedly connected to the corresponding planetary gear 150 through a spline structure. In this way, when torque is input to the three planetary gears 150, each planetary gear 150 drives the crankshaft 140 to rotate self, and the self-rotation of the crankshaft 140 drives the upper swing gear 120 and the lower swing gear 130 to revolve, thereby driving the output bracket 200 and the support flange 160 to rotate, realizing torque output.
[0052] Please refer to Figure 3 and Figure 4 , optionally, an annular receiving groove 113 and a first retaining groove 114 extending around its axis are provided on the inner wall surface of the pin tooth housing 110 near the first end 111. The number of the first retaining grooves 114 can be multiple and are arranged at intervals in the axial direction of the pin tooth housing 110. The multiple first retaining grooves 114 are all located between the bottom wall of the receiving groove 113 and the second end 112. For example, in this embodiment, the number of the first retaining grooves 114 is two. Among them, optionally, the receiving groove 113 is communicated with the mating hole of the mounting skeleton oil seal 300 provided on the pin tooth housing 110.
[0053] Please refer to Figures 5-6, in this embodiment, optionally, the output bracket 200 includes an integrated first shaft section 210, a second shaft section 220, and a shoulder 230. The outer diameter of the first shaft section 210 is smaller than that of the second shaft section 220, and the end of the first shaft section 210 away from the second shaft section 220 extends toward the second end 112 of the pin tooth housing 110. One end of the second shaft section 220 where the first shaft section 210 is installed has an annular surface around the first shaft section 210, and a second retention groove 221 is provided on the annular surface. The second retention groove 221 is an annular groove. The number of the second retention grooves 221 can be multiple. For example, in this embodiment, the number of the second retention grooves 221 is three. The shoulder 230 is located on the outer peripheral surface of the second shaft section 220. One side of the shoulder 230 is flush with the end surface of the second shaft section 220 where the first shaft section 210 is installed, and the other side of the shoulder 230 has a spacing from the output end surface of the second shaft section 220. A part of the shoulder 230 is inserted into the accommodation groove 113. During assembly, the skeleton oil seal 300 is matched with the outer diameter of the second shaft section 220 and the inner diameter of the accommodation groove 113 of the pin tooth housing 110. The shoulder 230, the first retention groove 114, and the second retention groove 221 are all located on the side of the skeleton oil seal 300 close to the second end 112 of the pin tooth housing 110. In this way, the shoulder 230, the accommodation groove 113, the first retention groove 114, and the second retention groove 221 cooperate to form a labyrinth seal structure with good blocking effect, which can greatly reduce the probability of lubricating oil moving from the inside of the pin tooth housing 110 to the skeleton oil seal 300, reduce the working load at the skeleton oil seal 300, reduce the probability of mutual friction between the skeleton oil seal 300 and impurities such as iron filings carried in the lubricating oil, reduce the probability of damage to the skeleton oil seal 300, and extend the service life of the skeleton oil seal 300.
[0054] It should be understood that a plurality of connecting studs 240 can be provided on the end surface of the first shaft section 210 away from the second shaft section 220. For example, in this embodiment, the number of the connecting studs 240 is three. Each connecting stud 240 penetrates through the upper swing gear 120 and the lower swing gear 130 and is fixedly connected to the support flange 160. The first support bearing 190 is provided between the first shaft section 210 and the pin tooth housing 110, and is located on the side of the skeleton oil seal 300 close to the second end 112 of the pin tooth housing 110.
[0055] It should be noted that the installation positions of the first retention groove 114 and the second retention groove 221 are different. Both can be set as annular grooves. Moreover, since the groove depth directions of the two are different, that is, the groove depth directions of the first retention groove 114 and the second retention groove 221 are perpendicular to each other, the lubricating oil has velocities in all directions under the agitation of components such as the output bracket 200. When the lubricating oil in different directions flows toward the skeleton oil seal 300, it can be blocked by the corresponding retention grooves, and the amount of lubricating oil reaching the skeleton oil seal 300 is small, thereby reducing the impurities such as iron filings reaching the skeleton oil seal 300.
[0056] It should be noted that the included angle in the groove depth direction between the first retaining groove 114 and the second retaining groove 221 is not limited to 90°.
[0057] In addition, both the first retaining groove 114 and the second retaining groove 221 are provided between the skeleton oil seal 300 and the first support bearing 190.
[0058] In other embodiments, a magnet is provided on the output frame 200 or the pin tooth housing 110, and the magnet is used to magnetically attract metal substances located in the retaining groove.
[0059] Furthermore, on the end face of the second shaft section 220 far from the first shaft section 210, that is, on the output end face of the output frame 200, a plurality of mounting grooves 222 are provided. The number of the mounting grooves 222 can be three, and the three mounting grooves 222 are evenly spaced in the circumferential direction of the second shaft section 220.
[0060] Please refer to Figure 2 and Figure 7 , optionally, the baffle 400 includes an annular body 410 and a plurality of mounting blocks 420. The plurality of mounting blocks 420 are all fixed on the annular body 410 and are spaced in the circumferential direction of the annular body 410. For example, in this embodiment, the number of the mounting blocks 420 is three, corresponding to and mating with the number of the mounting grooves 222 one by one. During installation, the three mounting blocks 420 are respectively inserted into the three mounting grooves 222 one by one, and each mounting block 420 is fixed on the second shaft section 220 through a corresponding fastener 500. At the same time, the annular body 410 is sleeved outside the second shaft section 220, a part of the annular body 410 is inserted into the accommodation groove 113, and the annular body 410 is located on the side of the skeleton oil seal 300 away from the shoulder 230. In this way, the annular body 410 not only plays a role in restricting external impurities from reaching the skeleton oil seal 300, but also plays a role in preventing the skeleton oil seal 300 from bulging and deforming.
[0061] It should be understood that the fastener 500 can be a screwed part. After the fastener 500 passes through the mounting block 420, it is screwed and fixed to the second shaft section 220, and the assembly is convenient and reliable.
[0062] The oil leakage prevention RV reduction gear provided in this embodiment, through the structural design of the shoulder 230, the accommodation groove 113, the first interception groove 114 and the second interception groove 221, blocks the lubricating oil flowing inside the pin tooth housing 110, reducing the probability of the lubricating oil and the impurities it carries moving from the inner side of the skeleton oil seal 300 to the skeleton oil seal 300. Through the structural design of the baffle 400 and the accommodation groove 113, the impurities in the external environment are blocked from reaching the skeleton oil seal 300 from the outside. In this way, the skeleton oil seal 300 is not easily damaged due to wear, has good sealing performance and a long service life. At the same time, the shoulder 230 can block the outward convex deformation of the skeleton oil seal 300, further extending the service life of the skeleton oil seal 300.
[0063] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. An anti-oil-leakage RV reduction device, characterized in that, Comprising: An RV transmission mechanism (100), an output frame (200), and a skeleton oil seal (300); the RV transmission mechanism includes a pin gear housing (110), the output frame (200) is rotatably installed inside the pin gear housing (110), and the skeleton oil seal (300) is installed between the pin gear housing (110) and the output frame (200); at least one of the pin gear housing (110) and the output frame (200) is provided with a retention groove, and the retention groove is located on the side of the skeleton oil seal (300) close to the inside of the pin gear housing (110).
2. The anti-oil leakage RV reduction device according to claim 1, characterized in that: The output frame (200) includes a connected first shaft section (210) and a second shaft section (220), the outer diameter of the second shaft section (220) is greater than the outer diameter of the first shaft section (210), one end of the second shaft section (220) provided with the first shaft section (210) has an annular surface around the first shaft section (210), and the retention groove is provided on the annular surface; the first shaft section (210) is rotatably installed inside the pin gear housing (110), and the skeleton oil seal (300) is provided between the pin gear housing (110) and the second shaft section (220).
3. The anti-oil leakage RV reduction device according to claim 2, characterized in that: The output frame (200) further includes a shoulder (230) sleeved on the outer peripheral surface of the second shaft section (220), a receiving groove (113) is provided on the inner wall surface of the pin gear housing (110), and the shoulder (230) is inserted into the receiving groove (113); the retention groove is located on the side of the shoulder away from the skeleton oil seal (300).
4. The anti-oil leakage RV reduction device according to claim 1, characterized in that: The retention groove is provided on the inner wall surface of the pin gear housing (110).
5. The anti-oil leakage RV reduction device according to claim 1, characterized in that: The retention groove is arranged as an annular groove disposed around the axis of the output frame.
6. The anti-oil leakage RV reduction device according to claim 1, characterized in that: The groove depth direction of the retention groove on the pin gear housing (110) and the retention groove on the output frame (200) has an included angle.
7. The anti-oil leakage RV reduction device according to claim 1, characterized in that: A magnet is provided on the output frame (200), and the magnet is used to magnetically attract metal substances located in the retention groove.
8. The anti-oil leakage RV reduction device according to claim 1, characterized in that: The RV transmission mechanism further includes a support bearing, the pin gear housing (110) and the output frame (200) are rotatably matched through the support bearing, and the support bearing is located on the side of the retention groove away from the skeleton oil seal (300).
9. The anti-oil leakage RV reduction device according to claim 1, characterized in that: The oil leakage prevention RV reduction device further includes a baffle plate (400), the baffle plate (400) is sleeved outside the output frame (200), and the baffle plate (400) is located on the side of the skeleton oil seal (300) away from the intercepting groove.
10. The oil leakage prevention RV reduction device according to claim 9, wherein: The baffle plate (400) includes an annular body (410) and a plurality of mounting blocks (420), the plurality of mounting blocks (420) are all fixed on the annular body (410) and are arranged at intervals in the circumferential direction of the annular body (410); a plurality of mounting grooves (222) are provided on the output end surface of the output frame (200), and the plurality of mounting blocks (420) are respectively embedded into the plurality of mounting grooves (222) in a one-to-one correspondence, and the annular body (410) is sleeved outside the output frame (200).