Speed reducer shell
By designing the connection between the maze ventilation structure and the oil return channel in the reducer housing, the problem of maze structure is solved, effective return and lubrication of oil is achieved, oil seepage and oil leakage are avoided, and the operation stability of the reducer is improved.
Patent Information
- Application Number
- CN202422443534.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-10
AI Technical Summary
The maze structure of the existing reducer housing is easily blocked after a long period of use, resulting in poor ventilation, which in turn causes abnormal increase in the pressure in the box, which may lead to oil leakage or seal failure.
The oil return channel connecting the maze ventilation structure and the reducer bearing chamber is designed so that the oil separated from the maze ventilation structure can flow back into the reducer bearing chamber through the return channel, and the bearings continue to lubricate and avoid excessive accumulation of oil.
It effectively avoids excessive accumulation of oil in the maze ventilation structure, ensures normal circulation of gas, prevents oil seepage and oil leakage, and improves the operating stability and sealing of the reducer.
Smart Images
Figure CN223136879U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a reducer housing. Background Art
[0002] When the reducer is working, in the closed reduction box, the friction caused by the meshing of gears generates heat, which gradually increases the temperature inside the reducer box. The gas in the box expands due to the heat, while the volume of the reduction box remains unchanged, so the pressure in the box increases accordingly, and the lubricating oil in the box splashes as the gears rotate. If the gas in the box is not discharged in time to release the pressure, oil leakage from the box will occur.
[0003] In order to deal with the above problems, the prior art often adopts a method of setting a ventilation structure in the reducer housing to achieve effective release of the pressure in the box and maintain the stability of the air pressure. Among them, a common practice is to introduce a labyrinth structure as part of the vent plug. The labyrinth structure, with its complex path design, can to a certain extent block the oil splashing in the box from directly entering the vent hole, thereby reducing the leakage of oil while ensuring the normal circulation of gas. However, although the labyrinth structure alleviates the problem of oil leakage to a certain extent, it also has some inherent limitations. Specifically, over time, some oil droplets or oil mist may still accumulate in the channel of the labyrinth structure and gradually block the vent hole. Once this blockage occurs, it will seriously affect the efficiency of the ventilation structure and even cause poor ventilation, which will cause an abnormal increase in the pressure in the box, and may eventually lead to oil leakage or sealing failure in the box again. Utility Model Content
[0004] Based on this, the purpose of the utility model is to provide a reducer housing to solve the technical problems mentioned in the above background technology.
[0005] On the one hand, the utility model proposes a reducer housing, comprising a base plate and a reducer outer shell arranged on the periphery of the base plate, the inner side of the reducer outer shell constitutes a reducer chamber, the surface of the base plate located on the reducer chamber side protrudes to form a ring-shaped enclosure, the inner side of the annular enclosure is recessed to form a reducer bearing chamber, a labyrinth ventilation structure is provided between the annular enclosure and the reducer housing, the labyrinth ventilation structure has an air inlet communicated with the reducer chamber, the reducer housing is provided with an air duct communicated with the labyrinth ventilation structure, and a ventilation cap is provided on the air duct, and the inner wall of the reducer bearing chamber is provided with an oil return channel communicated with the labyrinth ventilation structure.
[0006] Further, for the reducer housing, the labyrinth ventilation structure includes a left rib plate, a right rib plate, and an oil baffle. The left rib plate and the right rib plate are connected between the annular enclosure and the reducer outer shell. An air ventilation cavity is formed by enclosing the left rib plate, the reducer outer shell, the right rib plate, and the annular enclosure. An oil blocking structure forming a labyrinth circuit is provided in the air ventilation cavity, and the oil baffle closes the air ventilation cavity.
[0007] Further, for the reducer housing, the oil return passage and the air ventilation passage are aligned with the center line of the bottom plate. The oil blocking structure includes a first oil blocking rib, a second oil blocking rib, and a third oil blocking rib. The first oil blocking rib, the second oil blocking rib, and the third oil blocking rib are sequentially arranged at intervals along the center line direction in the air ventilation cavity.
[0008] Further, for the reducer housing, a support plate is provided on the inner wall of the reducer outer shell. The support plate is integrally formed between the left rib plate and the right rib plate, and a notch is provided at the position of the support plate corresponding to the third oil blocking rib.
[0009] Further, for the reducer housing, both ends of the second oil blocking rib are bent and extended to the support plate, so that the air ventilation cavity is separated into a first oil return cavity and a second oil return cavity by the second oil blocking rib. An air ventilation hole aligned with the center line is provided on the second oil blocking rib, and the air ventilation hole communicates the first oil return cavity and the second oil return cavity.
[0010] Further, for the reducer housing, the first oil blocking rib is horizontally arranged in a strip structure, and the third oil blocking rib is bent in an arc structure.
[0011] Further, for the reducer housing, two oil guiding ports are symmetrically provided on the annular enclosure, and a drainage plate extends obliquely outward at the oil guiding port. The labyrinth ventilation structure is aligned between the two drainage plates.
[0012] Further, for the reducer housing, a motor outer shell and a motor inner shell are provided on the side of the bottom plate facing away from the reducer bearing chamber. A motor cavity is formed between the motor outer shell and the motor inner shell. A cooling flow channel is formed by recessing the surface of the bottom plate on the side of the motor cavity, and the cooling flow channel is closed by a sealing cover.
[0013] Further, for the reducer housing, a liquid inlet and a liquid outlet communicating with the cooling flow channel are provided on the motor outer shell.
[0014] Further, for the reducer housing, the distance between the left rib plate and the right rib plate gradually increases in the direction of the air ventilation passage.
[0015] On the other hand, the present utility model also provides an axial flux motor, which includes the reducer housing described in the above technical solution.
[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0017] By designing an oil return passage connecting the labyrinth ventilation structure and the reducer bearing chamber, part of the oil separated in the labyrinth ventilation structure can flow back to the reducer bearing chamber through the oil return passage, enabling it to continue lubricating the bearing and avoiding excessive accumulation of oil in the labyrinth ventilation structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a side view of the reducer housing in the present utility model;
[0019] Figure 2 It is a front view of the reducer housing in the present utility model;
[0020] Figure 3 It is Figure 2 a partial enlarged schematic view of position A in
[0021] MAIN ELEMENT SYMBOL DESCRIPTION:
[0022] 10. Bottom plate; 21. Reducer outer shell; 22. Ring-shaped enclosure; 23. Reducer bearing chamber; 31. Left rib plate; 32. Right rib plate; 33. Oil baffle; 34. Air inlet passage; 35. Ventilation passage; 36. Ventilation cap; 37. Oil return passage; 38. Ventilation cavity; 381. First oil return cavity; 382. Second oil return cavity; 39. Ventilation hole; 41. First oil retaining rib; 42. Second oil retaining rib; 43. Third oil retaining rib; 51. Support plate; 52. Notch; 61. Oil guiding port; 62. Drainage plate; 71. Motor outer shell; 72. Motor inner shell; 73. Cooling flow channel; 74. Sealing cover; 75. Motor rear end cover; 76. Stator structure; 77. Rotor structure; 78. Arc-shaped mounting plate; 100. Center line.
[0023] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. SPECIFIC EMBODIMENTS
[0024] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.
[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0027] Please refer to Figures 1 to 3 , the reducer housing in the first embodiment of this utility model includes a bottom plate 10, and a reducer outer shell 21 provided on the periphery of the bottom plate 10. The inner side of the reducer outer shell 21 forms a reducer chamber. A circular retaining wall 22 protrudes from the surface of the bottom plate 10 on the side of the reducer chamber. A reducer bearing chamber 23 is recessed inside the circular retaining wall 22. A labyrinth ventilation structure is provided between the circular retaining wall 22 and the reducer outer shell 21. The labyrinth ventilation structure has an air inlet passage 34 communicating with the reducer chamber. An air vent passage 35 communicating with the labyrinth ventilation structure is provided on the reducer outer shell 21, and an air vent cap 36 is provided on the air vent passage 35. An oil return passage 37 communicating with the labyrinth ventilation structure is provided on the inner wall of the reducer bearing chamber 23.
[0028] By designing the oil return passage 37 that connects the labyrinth ventilation structure and the reducer bearing chamber 23, part of the oil separated in the labyrinth ventilation structure can flow back into the reducer bearing chamber 23 through the oil return passage 37, enabling it to continue lubricating the bearing and avoiding the situation of excessive accumulation of oil in the labyrinth ventilation structure.
[0029] Refer to Figure 3 , the labyrinth ventilation structure includes a left rib plate 31, a right rib plate 32 and an oil baffle 33. The left rib plate 31 and the right rib plate 32 are connected between the circular retaining wall 22 and the reducer outer shell 21. The left rib plate 31, the reducer outer shell 21, the right rib plate 32 and the circular retaining wall 22 enclose an air vent chamber 38. An oil retaining structure forming a labyrinth circuit is provided in the air vent chamber 38. The oil baffle 33 closes the air vent chamber 38.
[0030] Exemplarily, in this embodiment, the number of the intake ducts 34 is two, and the two intake ducts 34 are respectively arranged on the left rib plate 31 and the right rib plate 32 and are aligned with the oil return duct 37. When the reducer works, the high-temperature oil and gas generated in the reducer housing can enter the ventilation cavity 38 from the two intake ducts 34. At this time, under the action of the oil blocking structure, the oil in the high-temperature oil and gas is separated, and the gas is discharged to the outside by the ventilation cap 36. The separated oil enters the oil return duct 37 under the action of gravity and finally returns to the reducer bearing chamber 23 to lubricate the corresponding bearings.
[0031] Further, referring to Figure 3 , the oil return duct 37 and the ventilation duct 35 are aligned with the center line 100 of the bottom plate 10. The oil blocking structure includes a first oil blocking rib 41, a second oil blocking rib 42, and a third oil blocking rib 43. The first oil blocking rib 41, the second oil blocking rib 42, and the third oil blocking rib 43 are sequentially arranged at intervals along the direction of the center line 100 in the ventilation cavity 38. It can be understood that by arranging a plurality of oil blocking ribs in the ventilation cavity 38, the flow direction of the high-temperature oil and gas entering the ventilation cavity 38 can be changed at least once, so as to block the oil, and the oil entering the ventilation cap 36 is reduced to the greatest extent, thereby avoiding oil leakage and seepage. The number of the oil blocking ribs can be adjusted as required, and this embodiment is only an example rather than a limitation.
[0032] Further, a support plate 51 is provided on the inner wall of the reducer housing 21. The support plate 51 is integrally formed between the left rib plate 31 and the right rib plate 32. A notch 52 is provided at the position of the support plate 51 corresponding to the third oil blocking rib 43, and the notch 52 can be used to guide the gas into the ventilation duct 35.
[0033] In this embodiment, the distance between the left rib plate 31 and the right rib plate 32 gradually increases in the direction of the ventilation duct 35, which is conducive to the diffusion of the high-temperature oil and gas introduced by the intake duct 34 in the direction of the ventilation duct 35.
[0034] In this embodiment, both ends of the second oil baffle 42 bend and extend to the support plate 51, so that the ventilation cavity 38 is separated into a first oil return cavity 381 and a second oil return cavity 382 by the second oil baffle 42. A ventilation hole 39 aligned with the center line 100 is provided on the second oil baffle 42, and the ventilation hole 39 communicates the first oil return cavity 381 and the second oil return cavity 382. It can be understood that the formation of the first oil return cavity 381 and the second oil return cavity 382 realizes the double filtration of the oil in the high-temperature oil and gas. Specifically, when the high-temperature oil and gas enter the ventilation cavity 38, they first enter the first oil return cavity 381, and most of the oil in the high-temperature oil and gas is filtered out by the first oil baffle 41 and the second oil baffle 42. Subsequently, the high-temperature oil and gas enter the second oil return cavity 382 through the ventilation hole 39, and the oil in the high-temperature oil and gas is further filtered out by the third oil baffle 43, greatly avoiding the phenomenon of oil leakage and seepage in the reducer.
[0035] It should be noted that the oil in the second oil return cavity 382 can flow into the first oil return cavity 381 from the ventilation hole 39 and finally flow into the reducer bearing chamber 23 through the oil return channel 37.
[0036] In this embodiment, the first oil baffle 41 is horizontally arranged in a strip structure, and the third oil baffle 43 is bent in an arc structure. Of course, in actual application, the shapes of the first oil baffle 41 and the second oil baffle 42 can also be adjusted according to the size of the ventilation cavity 38. This embodiment is only an example rather than a limitation.
[0037] It should be noted that in addition to flowing back to the reducer bearing chamber 23 through the oil return channel 37, a small part of the oil separated in the ventilation cavity 38 also flows back to the reducer chamber through the air inlet channel 34. To reduce this phenomenon, the following solution is also proposed in this embodiment:
[0038] Specifically refer to Figure 2 , two oil guiding ports 61 are symmetrically provided on the annular enclosure 22, and a drainage plate 62 extends obliquely outward at the oil guiding port 61, and the labyrinth ventilation structure is aligned between the two drainage plates 62. It can be understood that through the design of the drainage plate 62, when the oil in the ventilation cavity 38 flows out through the air inlet channel 34, part of the oil can enter the oil guiding port 61 along the drainage plate 62 and finally flow back to the reducer bearing chamber 23.
[0039] Refer to Figure 1 , on the side of the bottom plate 10 facing away from the reducer bearing chamber 23, there are a motor outer shell 71 and a motor inner shell 72. A motor cavity is formed between the motor outer shell 71 and the motor inner shell 72. A cooling flow channel 73 is formed by the depression on the surface of the bottom plate 10 on the side of the motor cavity, and the cooling flow channel 73 is closed by a sealing cover 74.
[0040] It can be seen that in this embodiment, by arranging the motor housing 71 and the inner motor housing 72 on the side of the backplane facing away from the reducer housing 21, the motor housing and the reducer housing are integrated into one, greatly improving the structural integration and making the entire power transmission system more compact and stable. Secondly, the cooling flow channel 73 opened on the bottom plate 10 is located between the reducer chamber and the motor chamber, realizing the simultaneous cooling of the motor chamber and the reducer chamber, and can effectively absorb and carry away the heat generated in the two chambers during operation, ensuring the long-term stable operation of the equipment without overheating. At the same time, the labyrinth ventilation structure can also condense the high-temperature oil and gas into droplets by means of the cooling flow channel 73, thereby improving the effect of oil-liquid separation.
[0041] Furthermore, the motor housing 71 is provided with a liquid inlet and a liquid outlet communicated with the cooling flow channel 73. It can be understood that the liquid inlet and the liquid outlet can be connected to a pump body structure through pipes to drive the coolant to circulate in the cooling flow channel 73, improving the cooling effect.
[0042] Furthermore, the motor housing 71 is also connected with a motor rear housing end cover 75, and the motor rear housing end cover 75 is used to close the motor chamber to form a complete motor housing. Specifically, refer to Figure 1 , inside the motor housing, on the sealing cover 74 and on the motor rear end cover, a stator structure 76 is respectively provided, and a rotor structure 77 is provided between the two stator structures 76.
[0043] Refer to Figure 1 and Figure 2 , the periphery of the motor housing 71 is provided with an arc-shaped mounting plate 78, and a plurality of mounting holes are opened on the arc-shaped mounting plate 78. It can be understood that the mounting holes are used for passing bolts to fix the entire heat dissipation housing on equipment such as a vehicle frame. In practical applications, in order to improve the structural strength of the arc-shaped mounting plate 78, a plurality of reinforcing rib plates can also be added between the arc-shaped mounting plate 78 and the reducer housing 21.
[0044] In summary, for the reducer housing in the above embodiments of the present utility model, by designing an oil return channel 37 connecting the labyrinth ventilation structure and the reducer bearing chamber 23, part of the oil separated in the labyrinth ventilation structure can flow back into the reducer bearing chamber 23 through the oil return channel 37, enabling it to continue lubricating the bearings and avoiding the situation of excessive accumulation of oil in the labyrinth ventilation structure.
[0045] The second embodiment of the present utility model also provides an axial flux motor, including the reducer housing in the above technical solution.
[0046] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0047] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.
Claims
1. A reducer housing, comprising a bottom plate (10) and a reducer outer shell (21) provided at the periphery of the bottom plate (10). The inner side of the reducer outer shell (21) forms a reducer chamber. A circular enclosure (22) protrudes from the surface of the bottom plate (10) on the side of the reducer chamber. A reducer bearing chamber (23) is recessed inside the circular enclosure (22), and it is characterized in that, A labyrinth ventilation structure is provided between the annular enclosure (22) and the reducer housing (21). The labyrinth ventilation structure has an air inlet passage (34) communicating with the reducer chamber. A ventilation passage (35) communicating with the labyrinth ventilation structure is provided on the reducer housing (21), and a ventilation cap (36) is provided on the ventilation passage (35). An oil return passage (37) communicating with the labyrinth ventilation structure is provided on the inner wall of the reducer bearing chamber (23).
2. The speed reducer housing according to claim 1, characterized in that, The labyrinth ventilation structure includes a left rib plate (31), a right rib plate (32) and an oil baffle (33). The left rib plate (31) and the right rib plate (32) are connected between the annular enclosure (22) and the reducer housing (21). An air ventilation cavity (38) is formed by enclosing the left rib plate (31), the reducer housing (21), the right rib plate (32) and the annular enclosure (22). An oil blocking structure forming a labyrinth circuit is provided in the air ventilation cavity (38), and the oil baffle (33) closes the air ventilation cavity (38).
3. The speed reducer housing according to claim 2, characterized in that, The oil return passage (37) and the ventilation passage (35) are aligned with the center line (100) of the bottom plate (10). The oil blocking structure includes a first oil blocking rib (41), a second oil blocking rib (42) and a third oil blocking rib (43). The first oil blocking rib (41), the second oil blocking rib (42) and the third oil blocking rib (43) are sequentially arranged at intervals along the direction of the center line (100) in the air ventilation cavity (38).
4. The speed reducer housing according to claim 3, wherein, A support plate (51) is provided on the inner wall of the reducer housing (21). The support plate (51) is integrally formed between the left rib plate (31) and the right rib plate (32). A notch (52) is provided at the position of the support plate (51) corresponding to the third oil blocking rib (43).
5. The speed reducer housing according to claim 4, wherein, Both ends of the second oil blocking rib (42) are bent and extended to the support plate (51), so that the air ventilation cavity (38) is divided into a first oil return cavity (381) and a second oil return cavity (382) by the second oil blocking rib (42). An air ventilation hole (39) aligned with the center line (100) is provided on the second oil blocking rib (42), and the air ventilation hole (39) communicates the first oil return cavity (381) and the second oil return cavity (382).
6. The speed reducer housing according to claim 5, wherein The first oil blocking rib (41) is horizontally arranged in a strip structure, and the third oil blocking rib (43) is bent in an arc structure.
7. The speed reducer housing according to claim 1, characterized in that, Two oil guiding ports (61) are symmetrically provided on the annular enclosure (22), and a drainage plate (62) extends obliquely outward at the oil guiding port (61). The labyrinth ventilation structure is aligned between the two drainage plates (62).
8. The speed reducer housing according to claim 1, wherein, On the side of the bottom plate (10) facing away from the reducer bearing chamber (23), there are a motor housing (71) and a motor inner housing (72). A motor chamber is formed between the motor housing (71) and the motor inner housing (72). A cooling flow channel (73) is formed by the depression on the surface of the bottom plate (10) on the side of the motor chamber, and the cooling flow channel (73) is closed by a sealing cover (74).
9. The speed reducer housing according to claim 8, characterized in that, The motor housing (71) is provided with a liquid inlet and a liquid outlet that communicate with the cooling channel (73).
10. The speed reducer housing according to claim 2, characterized in that, The distance between the left rib plate (31) and the right rib plate (32) gradually increases in the direction of the ventilation channel (35).