Ventilation structure, reduction gearbox and vehicle
By designing the ventilation structure and oil-resistance structure in the reducer, the problem of oil injection or dripping at the ventilation plug during high-speed operation is solved, ensuring sufficient lubrication and extending the life and efficiency of the reducer.
Patent Information
- Application Number
- CN202420804968.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-17
AI Technical Summary
When the existing gearbox is running at high speed, oil spray or dripping will occur at the ventilation plug, resulting in insufficient lubrication and affecting the life and efficiency of the gearbox.
A ventilation structure is designed, including a gearbox housing and an oil-resistance structure. The gearbox housing forms an installation cavity and an isolation cavity. The isolation cavity is equipped with a communication hole and a ventilation hole, and the ventilation hole is used for gas discharge; the oil-resisting structure is installed in the isolation cavity to prevent oil from being discharged through the ventilation hole.
Through the design of the isolation chamber, high-temperature and high-pressure oil and gas can reduce pressure and reduce speed, and separate oil and gas; through the setting of the oil-resistance structure, the possibility of oil discharge through the ventilation hole is reduced, effectively avoiding oil injection or oil dripping at the ventilation plug, ensuring sufficient lubrication, and extending the life and efficiency of the gearbox.
Smart Images
Figure CN222615951U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reduction gearboxes, in particular to a ventilation structure, a reduction gearbox and a vehicle. Background Art
[0002] At present, the high-speed reduction gearbox of the electric drive assembly of electric vehicles mainly uses lubricating oil to lubricate the internal gears. However, when the high-speed reduction gearbox is running, high-temperature and high-pressure gas will be generated inside the reduction gearbox, and the gears inside it will stir the lubricating oil to cause the lubricating oil splashing, so that the splashing oil will splash from the inside to the vent hole, and when the vent hole is full of oil, the vent plug will produce continuous oil spraying or dripping. As a result, the amount of oil inside the reduction gearbox will become less, which will cause the gears inside the reduction gearbox to have insufficient lubrication problems, affecting the life and efficiency of the reduction gearbox. Utility Model Content
[0003] The main purpose of the utility model is to provide a ventilation structure, a reduction gearbox and a vehicle, aiming at solving the problem that oil spraying or oil dripping may occur at the ventilation plug of the existing reduction gearbox when the reduction gearbox is running at high speed.
[0004] In order to achieve the above-mentioned purpose, the ventilation structure proposed in the utility model is used for a reduction gearbox, and the ventilation structure comprises:
[0005] The reduction gearbox housing is formed with an installation cavity and an isolation cavity, the isolation cavity is arranged corresponding to the input driving shaft of the reduction gearbox, the isolation cavity is provided with a connecting hole and a vent hole, the connecting hole is connected with the installation cavity, and the vent hole is used for exhausting gas in the isolation cavity; and,
[0006] The oil-blocking structure is arranged in the isolation chamber to prevent the oil in the isolation chamber from being discharged through the vent hole.
[0007] In one embodiment, the oil-blocking structure includes an oil-blocking convex rib disposed in the isolation cavity, and the oil-blocking convex rib is disposed between the communicating hole and the vent hole.
[0008] In one embodiment, the reduction gearbox housing includes a reduction gearbox front housing and a reduction gearbox rear housing detachably mounted on the reduction gearbox front housing;
[0009] Wherein, the oil-blocking rib is arranged on the front housing of the reduction gearbox.
[0010] In one embodiment, an oil drain groove is provided in the isolation cavity, and the oil drain groove is extended along the oil-blocking rib toward the connecting hole.
[0011] In one embodiment, the oil-blocking structure further includes an oil collecting tank disposed in the isolation chamber for lubricating the high-speed bearing in the reduction gearbox;
[0012] One end of the oil drain groove extends to the oil blocking rib, and the other end is connected to the oil collecting groove.
[0013] In one embodiment, the reduction gearbox housing includes a reduction gearbox front housing and a reduction gearbox rear housing detachably mounted on the reduction gearbox front housing;
[0014] Wherein, the oil drain groove is arranged on the rear housing of the reduction box.
[0015] In one embodiment, the oil-blocking structure further includes an oil leakage hole provided in the isolation cavity, and the oil leakage hole is provided corresponding to the vent hole.
[0016] In one embodiment, the oil-blocking structure further includes a straight-through vent plug disposed at the vent hole.
[0017] The utility model also provides a reduction box, comprising the above-mentioned ventilation structure, wherein the ventilation structure comprises:
[0018] The reduction gearbox housing is formed with an installation cavity and an isolation cavity, the isolation cavity is arranged corresponding to the input driving shaft of the reduction gearbox, the isolation cavity is provided with a connecting hole and a vent hole, the connecting hole is connected with the installation cavity, and the vent hole is used for exhausting gas in the isolation cavity; and,
[0019] The oil-blocking structure is arranged in the isolation chamber to prevent the oil in the isolation chamber from being discharged through the vent hole.
[0020] The utility model also provides a vehicle, comprising the above-mentioned reduction box.
[0021] The technical solution of the utility model adopts an installation cavity to install the transmission structure, adopts an isolation cavity to enable the high-temperature and high-pressure oil and gas generated in the installation cavity to be released in the isolation cavity, so that the gas is discharged through the vent after the pressure is reduced, and adopts the oil-blocking structure to block the oil and gas in the isolation cavity, thereby reducing the probability of the oil being carried out of the vent by the gas. In this way, the isolation cavity is set to provide a larger space so that the high-temperature and high-pressure oil and gas can be depressurized and decelerated, so that the oil and gas can be separated. At the same time, the oil-blocking structure is set to block the oil in the isolation cavity and reduce the possibility of the oil being discharged through the vent, which can effectively prevent the oil in the isolation cavity from being discharged through the vent, thereby solving the problem of oil spraying or dripping at the vent plug of the existing reducer when running at high speed. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0023] Figure 1 A schematic diagram of the front structure of a reduction gearbox with a ventilation structure according to an embodiment of the present invention;
[0024] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the front housing of the reduction gearbox;
[0025] Figure 3 A schematic diagram of the front structure of an embodiment of a rear housing of a reduction gearbox with a ventilation structure provided by the utility model;
[0026] Figure 4 for Figure 2 A schematic diagram of a partial three-dimensional structure of the rear housing of the reduction gearbox;
[0027] Figure 5 This is a schematic diagram of the transmission structure of the reduction box provided by the utility model.
[0028] …
[0029] Description of Figure Numbers:
[0030] 100, ventilation structure; 1, reduction gearbox housing; 11, reduction gearbox front housing; 12, reduction gearbox rear housing; 13, installation cavity; 14, isolation cavity; 141, communication hole; 142, ventilation hole; 2, oil blocking structure; 21, oil blocking rib; 22, oil drain groove; 23, oil collecting groove; 24, oil drain hole; 25, straight-through ventilation plug;
[0031] 200. Transmission structure; 3. Input driving shaft; 31. Input driving gear; 32. High-speed bearing; 41. Input driven gear; 42. Output driving gear; 51. Main reduction gear.
[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0036] At present, the high-speed reduction gearbox of the electric drive assembly of the automobile mainly uses lubricating oil to lubricate the internal gears. However, when the high-speed reduction gearbox is running, high-temperature and high-pressure gas will be generated inside the reduction gearbox, and the gears inside it will stir the lubricating oil to cause the lubricating oil splashing, so that the splashing oil will splash from the inside to the vent hole, and when the vent hole is full of oil, the vent plug will produce continuous oil spraying or dripping. As a result, the amount of oil inside the reduction gearbox will become less, which will cause the gears inside the reduction gearbox to have insufficient lubrication problems, affecting the life and efficiency of the reduction gearbox.
[0037] The utility model proposes a ventilation structure for a reduction gearbox, aiming to solve the problem that oil spraying or oil dripping may occur at the ventilation plug of the existing reduction gearbox when the reduction gearbox is running at high speed. Figures 1 to 5 A structural schematic diagram of a gearbox provided by the utility model.
[0038] See also Figures 1 to 4The ventilation structure 100 includes a reduction gearbox housing 1 and an oil-blocking structure 2. The reduction gearbox housing 1 is formed with an installation cavity 13 and an isolation cavity 14. The isolation cavity 14 is arranged corresponding to the input driving shaft 3 of the reduction gearbox. The isolation cavity 14 is provided with a connecting hole 141 and a vent hole 142. The connecting hole 141 is connected to the installation cavity 13. The vent hole 142 is used for the gas in the isolation cavity 14 to be discharged. The oil-blocking structure 2 is arranged in the isolation cavity 14 to prevent the oil in the isolation cavity 14 from being discharged through the vent hole 142.
[0039] In the technical solution of the utility model, an installation cavity 13 is adopted to install the transmission structure 200, and an isolation cavity 14 is adopted to enable the high-temperature and high-pressure oil and gas generated in the installation cavity 13 to be released in the isolation cavity 14, so that the gas is discharged through the vent hole 142 after the pressure is reduced, and the oil-blocking structure 2 is adopted to block the oil and gas in the isolation cavity 14, thereby reducing the probability of the oil being carried out of the vent hole 142 by the gas. In this way, the isolation cavity 14 is set to provide a larger space so that the high-temperature and high-pressure oil and gas can be depressurized and decelerated, so that the oil and gas can be separated. At the same time, the oil-blocking structure 2 is set to block the oil in the isolation cavity 14, and reduce the possibility of the oil being discharged through the vent hole 142, which can effectively prevent the oil in the isolation cavity 14 from being discharged through the vent hole 142, thereby solving the problem of oil spraying or dripping at the vent plug when the existing reducer is running at high speed.
[0040] It should be noted that the installation cavity 13 is used for installing the transmission structure 200. Specifically, in one embodiment, please refer to Figure 5 The transmission structure 200 includes an input structure, a driven structure and a reduction structure arranged in the installation cavity 13, the input structure includes an input driving shaft 3, an input driving tooth 31 arranged on the input driving shaft 3 and a high-speed bearing 32 sleeved on the input driving shaft 3, the driven structure includes an input driven shaft, an input driven tooth 41 and an output driving tooth 42 arranged on the input driven shaft, the input driven tooth 41 meshes with the input driving tooth 31, the reduction structure includes a main reduction shaft and a main reduction tooth 51 arranged on the main reduction shaft, the main reduction tooth 51 meshes with the output driving tooth 42, thus, by setting the input structure, the driven structure and the reduction structure, the torque of the input driving shaft 3 can be output through the main reduction shaft. Furthermore, the oil throwing trajectory of the oil stirred by the input driving tooth 31 is as shown in FIG. Figure 1 As shown by the arrow in FIG. 1 , the oil throwing trajectory of the oil stirred by the output driving gear 42 is as follows: Figure 2 As shown by the arrow in FIG. 1 , the oil throwing trajectory of the oil stirred by the input driven gear 41 is as follows: Figure 3 As indicated by the arrow in .
[0041] In some embodiments of the present invention, please refer to Figure 1 and Figure 2 The oil-blocking structure 2 includes an oil-blocking rib 21 disposed in the isolation chamber 14, and the oil-blocking rib 21 is disposed between the connecting hole 141 and the vent hole 142. Thus, by providing the oil-blocking rib 21, the oil is prevented from flowing toward the vent hole 142, thereby preventing the oil from being discharged through the vent hole 142. Furthermore, there are multiple numbers of the oil-blocking ribs 21, which may be one or multiple, etc., and the utility model does not limit this. Specifically, in the present embodiment, multiple oil-blocking ribs 21 are provided, and multiple oil-blocking ribs 21 are spaced apart from each other along the connecting hole 141 toward the vent hole. Thus, by providing multiple oil-blocking ribs 21, the blocking ability of the oil-blocking structure 2 is enhanced.
[0042] For further information, see Figure 1 and Figure 2 The reduction gearbox housing 1 includes a reduction gearbox front shell 11 and a reduction gearbox rear shell 12 detachably mounted on the reduction gearbox front shell 11, wherein the oil-blocking rib 21 is arranged on the reduction gearbox front shell 11. Since the oil stirred by the input active teeth 31 and the output active teeth 42 is mainly located in the reduction gearbox front shell 11, that is, the oil stirred by the input active teeth 31 and the output active teeth 42 mainly enters the cavity of the reduction gearbox front shell 11, the oil-blocking rib is only arranged in the reduction gearbox front shell 11 to block the oil entering the isolation cavity 14 of the reduction gearbox front shell 11 through the connecting hole 141, which can not only ensure the oil-blocking effect of the oil-blocking structure 2, but also simplify the structure of the reduction gearbox rear shell 12 and reduce the cost of the reduction gearbox.
[0043] It can be understood that in order to allow the oil in the isolation chamber 14 to converge toward the reduction gearbox rear housing 12, in the present embodiment, the side wall of the isolation chamber 14 close to the input driving shaft 3 is inclined, and the inclination direction is from the reduction gearbox front housing 11 toward the reduction gearbox rear housing 12 toward the direction close to the input driving shaft 3, so that the oil in the isolation chamber 14 can converge toward one side of the reduction gearbox rear housing 12.
[0044] In some embodiments of the present invention, please refer to Figure 3 and Figure 4The oil-blocking structure 2 also includes an oil drain groove 22 provided in the isolation chamber 14, and the oil drain groove 22 is extended along the oil-blocking rib 21 toward the connecting hole 141. In this way, by providing the oil drain groove 22, on the one hand, the oil entering the isolation chamber 14 can be gathered together, and on the other hand, the oil can flow along a predetermined path to guide the gathered oil to a preset position to prevent the oil from gathering near the vent hole 142.
[0045] Furthermore, an oil collecting groove 23 is formed in the isolation chamber 14 for lubricating the high-speed bearing 32 in the reduction box. One end of the oil drain groove 22 extends to the oil-blocking rib 21, and the other end is connected to the oil collecting groove 23 to guide the gathered oil to the oil collecting groove 23, which can prevent the oil from gathering at the vent hole 142 and lubricate the high-speed bearing 32.
[0046] It should be noted that the oil drain groove 22 can also guide the oil to other positions. Specifically, in another embodiment, the oil drain groove 22 is connected to the connecting hole 141 to guide the gathered oil to the connecting hole 141, so that the oil can flow back into the installation cavity 13 to avoid insufficient lubricating oil in the installation cavity 13. Further, the oil collecting groove 23 is arranged corresponding to the connecting hole 141, so that the oil overflowing from the oil collecting groove 23 can flow back into the installation cavity 13 through the connecting hole 141, which can not only lubricate the high-speed bearing 32, but also replenish the lubricating oil in the installation cavity 13.
[0047] In some embodiments of the utility model, the reducer housing 1 includes a reducer front shell 11 and a reducer rear shell 12 detachably mounted on the reducer front shell 11, wherein the oil drain groove 22 is disposed on the reducer rear shell 12. Since the oil in the isolation chamber 14 is mainly accumulated in the reducer rear shell 12, by providing the oil drain groove 22 in the reducer rear shell 12, the accumulated oil can be guided to other positions to prevent the oil from accumulating near the vent 142, and the structure of the reducer front shell 11 can be simplified, thereby helping to reduce the cost of the reducer.
[0048] In some embodiments of the present invention, please refer to Figure 4The oil-blocking structure 2 also includes an oil drain hole 24 provided in the isolation chamber 14, and the oil drain hole 24 is provided corresponding to the vent hole 142. Since the oil-blocking rib 21 can only block part of the oil, another part of the oil may pass through the oil-blocking rib 21 and gather in the isolation chamber 14 at the vent hole 142. Therefore, by providing the oil drain hole 24, the oil at the vent hole 142 can flow out of the isolation chamber 14, preventing the oil in the isolation chamber 14 from gathering at the vent hole 142, thereby preventing the oil from being discharged through the vent hole 142.
[0049] In some embodiments of the present invention, please refer to Figure 3 The oil-blocking structure 2 also includes a straight-through vent plug 25 disposed on the vent hole 142. Thus, by providing the straight-through vent plug 25, the gas in the isolation chamber 14 can be discharged and the probability of oil flowing out of the isolation chamber 14 can be reduced.
[0050] The utility model also proposes a reduction gearbox, which includes the above-mentioned ventilation structure 100. The specific structure of the ventilation structure 100 refers to the above-mentioned embodiment. Since the reduction gearbox adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.
[0051] The utility model also proposes a vehicle, which includes the above-mentioned reduction box. The specific structure of the reduction box refers to the above-mentioned embodiment. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.
[0052] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A ventilation structure for a reduction gearbox, characterized in that: The ventilation structure comprises: The reduction gearbox housing is formed with an installation cavity and an isolation cavity, the isolation cavity is arranged corresponding to the input driving shaft of the reduction gearbox, the isolation cavity is provided with a connecting hole and a vent hole, the connecting hole is connected with the installation cavity, and the vent hole is used for exhausting gas in the isolation cavity; and, The oil-blocking structure is arranged in the isolation chamber to prevent the oil in the isolation chamber from being discharged through the vent hole.
2. The ventilation structure according to claim 1, characterized in that: The oil-blocking structure includes an oil-blocking convex rib arranged in the isolation cavity, and the oil-blocking convex rib is arranged between the communicating hole and the vent hole.
3. The ventilation structure according to claim 2, characterized in that: The reduction gearbox housing comprises a reduction gearbox front housing and a reduction gearbox rear housing detachably mounted on the reduction gearbox front housing; Wherein, the oil-blocking rib is arranged on the front housing of the reduction gearbox.
4. The ventilation structure according to claim 2, characterized in that: The oil-blocking structure further includes an oil drain groove disposed in the isolation cavity, and the oil drain groove is extended along the oil-blocking rib toward the connecting hole.
5. The ventilation structure according to claim 4, characterized in that: An oil collecting groove is formed in the isolation cavity to lubricate the high-speed bearing in the reduction box; One end of the oil groove extends to the oil-blocking rib, and the other end is connected to the oil collecting groove.
6. The ventilation structure according to claim 4, characterized in that: The reduction gearbox housing comprises a reduction gearbox front housing and a reduction gearbox rear housing detachably mounted on the reduction gearbox front housing; Wherein, the oil drain groove is arranged on the rear housing of the reduction box.
7. The ventilation structure according to claim 2, characterized in that: The oil-blocking structure further includes an oil leakage hole disposed in the isolation cavity, and the oil leakage hole is disposed corresponding to the vent hole.
8. The ventilation structure according to claim 1, characterized in that: The oil-blocking structure further includes a straight-through vent plug arranged at the vent hole.
9. A reduction gearbox, characterized in that: Comprising the ventilation structure according to any one of claims 1 to 8.
10. A vehicle, characterized in that: Comprising the reduction gearbox as claimed in claim 9.