Gearbox with lubricating oil way

Abstract

The utility model discloses a gearbox with a lubricating oil circuit, which comprises a shell, an input shaft, a first shaft, a second shaft and a differential shaft, the input shaft, the first shaft, the second shaft and the differential shaft are arranged in the shell, each shaft is provided with a plurality of gears, and lubricating oil is arranged in the shell; a part of the area of a first gear on the outer wall of the second shaft is immersed in the lubricating oil so that the lubricating oil can be lifted to a preset height through the first gear, the shell is provided with an inclined first oil channel at the preset height, and the lower side of the first oil channel communicates with an oil inlet of a first bearing chamber of the input shaft; the shell is further provided with a second oil duct, the high side of the second oil duct is communicated with an oil outlet of the first bearing chamber, and the low side of the second oil duct is communicated into a second bearing chamber of the second shaft. According to the utility model, the first oil duct and the second oil duct are arranged, so that the lubricating oil with a lower liquid level is stirred and splashed through the first gear, and the oil circulation in the first bearing chamber of the input shaft is realized, so that the lubrication of a part at the end far away from the liquid level is realized, and the effective lubrication requirement with low cost is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of gearbox equipment, in particular to a gearbox with a lubricating oil circuit. Background Art

[0002] In a gearbox, the shaft and gear trains frequently operate in complex conditions, requiring regular lubrication with lubricants. Lubricants can clean, cool, and lubricate the gearbox. They can also prevent corrosion and provide the necessary sealing properties. Therefore, choosing the right lubricant and replacing it regularly are important for maintaining the performance of the gearbox and extending its service life. However, due to the large size of the gearbox, gears and drive shafts are arranged at various positions. Therefore, immersing all components in lubricants will increase costs. The lubrication effect of the oil-splashing lubrication process depends on the speed of the gears, which requires less lubricants. However, when the gearbox is just started and the speed is low, the lubrication is insufficient, and it is difficult for the lubricant to splash to a position far from the lubricant liquid surface. The bearings on the inner side of the housing side wall are even more difficult to splash, resulting in poor lubrication.

[0003] Therefore, how to improve the lubrication effect of the gearbox and reduce the lubrication cost is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] In view of this, an object of the present invention is to provide a gearbox with a lubricating oil circuit to improve the lubrication effect of the gearbox and reduce the lubrication cost.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A gearbox with a lubricating oil circuit comprises a housing and an input shaft, a first shaft, a second shaft and a differential shaft arranged in the housing, each shaft being provided with a plurality of gears, and lubricating oil being provided in the housing;

[0007] Part of the first gear on the outer wall of the two shafts is immersed in the lubricating oil so that the lubricating oil is raised to a preset height through the first gear. The housing is provided with a first oil channel at the preset height position. The first oil channel is an inclined oil channel and its low side is connected to the oil inlet of the first bearing chamber of the input shaft; the housing is also provided with a second oil channel, the high side of the second oil channel is connected to the oil outlet of the first bearing chamber, and the low side of the second oil channel is connected to the second bearing chamber of the two shafts.

[0008] Preferably, in the above-mentioned gearbox with a lubricating oil circuit, the first bearing chamber is provided with an oil baffle at the oil outlet position thereof, and the oil baffle guides the lubricating oil into the interior of the first bearing chamber.

[0009] Preferably, in the above-mentioned gearbox with a lubricating oil circuit, a third oil channel is also provided on the housing, the high side of the third oil channel receives the lubricating oil splashed by the rotation of the first gear, and the low side of the third oil channel is connected to the oil inlet of the third bearing chamber of the differential shaft.

[0010] Preferably, in the above-mentioned gearbox with a lubricating oil circuit, the oil outlet of the third bearing chamber is connected to the second bearing chamber.

[0011] Preferably, in the above-mentioned gearbox with a lubricating oil circuit, the fourth bearing chamber of the one shaft is immersed in the lubricating oil.

[0012] Preferably, in the above-mentioned gearbox with a lubricating oil circuit, the liquid level of the lubricating oil in the housing is lower than that of the second bearing chamber and the third bearing chamber.

[0013] Preferably, in the above-mentioned gearbox with a lubricating oil circuit, the oil baffle is made of rigid stainless steel or flexible rubber.

[0014] Preferably, in the above-mentioned gearbox with a lubricating oil passage, the first oil passage is a unidirectional linear oil passage, and the high side of the first oil passage is higher than the preset height, and the low side thereof is lower than the preset height.

[0015] Preferably, in the above-mentioned gearbox with a lubricating oil passage, the second oil passage is a bent channel including a bending area, and the lubricating oil flows into the second bearing chamber after being buffered in the bending area.

[0016] Preferably, in the above-mentioned gearbox with lubricating oil passage, the first gear is the largest gear among the plurality of gears provided on the outer walls of the two shafts.

[0017] As can be seen from the above technical solution, the gearbox with a lubricating oil passage provided by the present invention stirs and transports the lubricating oil set in the housing through the first gear, and at the same time, an oil channel structure is integrated on the inner wall of the housing to guide and transport the lubricating oil. Specifically, the first gear raises the lubricating oil to a preset height during rotation, and the stirred lubricating oil flows into the first bearing chamber of the input shaft under the inclined guidance of the first oil channel, thereby meeting the lubrication needs of the first bearing chamber that is farther away from the lubricating oil liquid level; at the same time, the second oil channel receives the lubricating oil flowing out of the first bearing chamber and guides the lubricating oil into the second bearing chamber of the second shaft to meet the lubrication needs of the second bearing chamber. The above structure only requires lubricating oil that can immerse a portion of the first gear in the housing, and can achieve the lubrication needs of the first bearing chamber and the second bearing chamber through the cooperation of the first gear and the oil channel. The amount of lubricating oil required is small, and the gearbox has a high degree of integration, which can meet the lubrication effect while reducing the lubrication cost of the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the structure of the forward oil passage inside the housing provided by an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the back oil channel structure.

[0021] Among them, 10 is a housing; 110 is a first oil channel; 120 is a second oil channel; 130 is a third oil channel; 20 is a first gear; 30 is a first bearing chamber; 40 is a second bearing chamber; 50 is a third bearing chamber; 60 is a fourth bearing chamber; 70 is an oil baffle. DETAILED DESCRIPTION

[0022] The core of the utility model is to disclose a gearbox with a lubricating oil circuit to improve the lubrication effect of the gearbox and reduce the lubrication cost.

[0023] In order to help those skilled in the art better understand the present invention, the following describes embodiments of the present invention with reference to the accompanying drawings. Furthermore, the embodiments described below do not limit the scope of the invention as set forth in the claims. Furthermore, the entire contents of the embodiments described below are not necessarily required to serve as the solution of the invention as set forth in the claims.

[0024] like Figure 1 and Figure 2As shown, the gearbox with a lubricating oil circuit provided by the embodiment of the present invention mainly includes a shell 10 that constitutes the structural appearance of the gearbox. The interior of the shell 10 is a cavity structure and is provided with an input shaft, a first shaft, a second shaft and a differential shaft, so that the power input of the input shaft is transmitted to the differential shaft through the shaft system transmission of the first shaft and the second shaft. It should be noted that each shaft is provided with a number of gears to form a gear train structure to realize transmission. The gear train transmission structure is not described here. In particular, lubricating oil is provided inside the shell 10. The lubricating oil is only set to a certain height inside the shell 10, and will not fill the shell 10, so as to avoid waste caused by excessive use of lubricating oil. At the same time, the bearing chamber of each shaft is driven by the oil circuit setting and the rotation of the gear to achieve lubrication. Specifically, the second shaft serves as the main transmission shaft, and its outer wall is sleeved with several gears, including the first gear 20. The lubricating oil level within the housing 10 must be high enough to allow a portion of the first gear 20 to be submerged in the oil. This allows the gears to agitate and lift any lower lubricating oil as the first gear 20 rotates. The effective oil lift height of the first gear 20 is a preset height, which can be adjusted by the designer based on the transmission structure and the layout of the components within the housing 10, by selecting first gears 20 of different sizes.

[0025] Correspondingly, the housing 10 is provided with a first oil channel 110 at a preset height to receive part of the lubricating oil after the first gear 20 drives the lubricating oil to the preset height. It should be noted that the first oil channel 110 is an oil channel with an inclined structure, and the lower side of the first oil channel 110 is connected to the oil inlet of the first bearing chamber 30 of the input shaft. The first bearing chamber 30 is an area on the input shaft where bearings are provided and which requires effective lubrication during operation. Since the input shaft is an area far from the liquid surface and the structure of the first bearing chamber 30 is small, it is difficult to transport the lubricating oil to the first bearing chamber 30 simply by the stirring action of the first gear 20. The setting of the first oil channel 110 can collect part of the lubricating oil stirred by the first gear 20 and transport it to the first bearing chamber 30 to meet the lubrication needs of the first bearing chamber 30.

[0026] In addition to ensuring lubrication of the first bearing chamber 30, the housing 10 is further provided with a second oil passage 120. The higher side of the second oil passage 120 communicates with the oil outlet of the first bearing chamber 30. Lubricating oil entering the first bearing chamber 30 lubricates the components within the first bearing chamber 30 before flowing from the oil outlet of the first bearing chamber 30 into the second oil passage 120, thereby circulating the lubricating oil within the first bearing chamber 30. The lower side of the second oil passage 120 communicates with the second bearing chamber 40 of the two shafts. This allows the lubricating oil to circulate through the first bearing chamber 30, pass through the second bearing chamber 40, effectively lubricate the second bearing chambers 40 of the two shafts, and then return to the area where the lubricating oil is located.

[0027] It should be noted that in the above embodiment, by providing the first oil passage 110 and the second oil passage 120 on the housing 10, lubrication of the first bearing chamber 30 of the input shaft, which is farther from the lubricating oil level, and the second bearing chamber 40 of the second shaft, which are located further from the lubricating oil level, can be met even when the lubricating oil level is low. Similarly, the bearing chambers of the primary and differential shafts can also be lubricated in the same manner as described above by providing oil passages to receive lubricating oil stirred up by the first gear 20 or other gear structures and directing it to the corresponding bearing chambers, thereby meeting their respective lubrication requirements.

[0028] In addition, it should be noted that since the first bearing chamber 30 of the input shaft itself is far away from the lubricating oil in the housing 10, and when the gearbox is started, it takes a certain amount of time for the first gear 20 to receive the transmission effect of the input shaft, and at the same time, it takes a certain amount of time for the first gear 20 to drive the lubricating oil to the first oil channel 110, and then enter the first bearing chamber 30, which will cause lubrication lag in the first bearing chamber 30 and affect its safe operation. Therefore, in some embodiments of the present invention, the first bearing chamber 30 is further provided with an oil baffle 70 at its oil outlet position. The oil baffle 70 is used to guide the lubricating oil to the inside of the first bearing chamber 30 to cooperate with the lubricating oil stored in the first bearing chamber 30. When the input shaft is started, it can quickly lubricate the first bearing chamber 30 through the gear action of the outer wall of the input shaft, thereby avoiding the problem of lubrication lag affecting the smooth operation of the gearbox.

[0029] At the same time, in the above embodiment, the oil baffle 70 only needs to form a baffle configuration to block the lubricating oil, and its material selection and structural design are relatively free. For example, it can be made of rigid stainless steel or flexible rubber.

[0030] Furthermore, on the basis of the aforementioned embodiment, in order to meet the lubrication needs of the third bearing chamber 50 of the differential shaft, a third oil channel 130 is further provided on the housing 10. The third oil channel 130 is set based on the rotation direction of the first gear 20, and the higher side of its oil channel is set lower than the preset height, and is located downstream of the first gear 20 stirring the lubricating oil at the preset height, and can receive the lubricating oil splashed by the rotation of the first gear 20 through the higher side of its oil channel. At the same time, the lower side of the third oil channel 130 is connected to the oil inlet of the third bearing chamber 50 of the differential shaft to guide the collected lubricating oil into the third bearing chamber 50, thereby realizing the oil stirring effect through a single gear, namely the first gear 20, and meeting the lubrication needs of multiple bearing chambers at the same time, which improves the setting integration of components in the gearbox and reduces lubrication costs.

[0031] In order to further optimize the above technical solution, in some embodiments of the present invention, the oil outlet of the third bearing chamber 50 is also connected to the second bearing chamber 40, that is, the second bearing chamber 40 can simultaneously receive the lubricating oil flowing out of the first bearing chamber 30 and the lubricating oil flowing out of the third bearing chamber 50, and on the basis of realizing the circulation of the lubricating oil, the lubrication needs of multiple bearing chambers can be met through the flow channel and structural design.

[0032] Furthermore, considering that a shaft is relatively small in size and is generally arranged at the bottom position in the gearbox, setting an oil channel for the fourth bearing chamber 60 of the shaft will make the oil channel longer and the lubrication effect poor. Therefore, in some embodiments of the present invention, the fourth bearing chamber 60 of the shaft is immersed in the lubricating oil so that the lubricating oil can directly and effectively lubricate the fourth bearing chamber 60 of the shaft. At the same time, the gears arranged on the periphery of the shaft can also enhance the stirring effect of the lubricating oil, thereby enhancing the fluidity of the lubricating oil and assisting the oil stirring and lubrication effect of the first gear 20.

[0033] On the basis of the above embodiment, in order to reduce the cost of using lubricating oil, it is preferred that the lubricating oil in the housing 10 only immerses the four bearing chambers, and the liquid level of the lubricating oil is lower than the second bearing chamber 40 and the third bearing chamber 50. The second bearing chamber 40 and the third bearing chamber 50, as well as the first bearing chamber 30, are all lubricated by the oil stirring and splashing effect of the first gear 20. It can meet the lubrication needs of the four bearing chambers with the minimum amount of lubricating oil used, so that the gearbox has better economic benefits.

[0034] In addition, in order to improve the lubrication effect of the first bearing chamber 30, in some embodiments of the present invention, the first oil channel 110 is a one-way straight oil channel to reduce the difficulty of its installation on the housing 10. At the same time, the high side of the first oil channel 110 is higher than the preset height, and the low side is lower than the preset height, that is, the preset height is in the middle area of ​​the first oil channel 110. When the lubricating oil splashes to a certain error range above and below the preset height, it can be collected by the first oil channel 110, that is, the first oil channel 110 can collect more lubricating oil at a single moment, thereby increasing the amount of lubricating oil received by the first bearing chamber 30 to meet its lubrication needs.

[0035] At the same time, unlike the first oil channel 110, the second oil channel 120 is a curved channel including a bending area, and the opening of the bending area is toward the top of the gearbox. When the lubricating oil flows through the second oil channel 120, it will be buffered and decelerated in the bending area, and then flow into the second bearing chamber 40, thereby avoiding the risk of insufficient lubrication in the second bearing chamber 40 due to excessive flow of the lubricating oil, thereby ensuring the lubrication effect in the second bearing chamber 40.

[0036] In addition, it should be noted that in order to improve the oil stirring effect of the first gear 20, it is preferred that the first gear 20 is the largest gear among the several gears arranged on the outer wall of the two shafts, so that it can carry a larger amount of lubricating oil and meet the lubricating oil quantity requirements in each bearing chamber.

[0037] It should be noted that, for ease of description, only the parts related to the relevant utility model are shown in the drawings. In the absence of conflict, the embodiments of the utility model and the features in the embodiments can be combined with each other.

[0038] As used in this utility model and the claims, unless the context clearly indicates an exception, the terms "a," "an," "an," and / or "the" do not specifically refer to the singular and may include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The phrase "comprises a..." does not preclude the presence of other identical elements in the process, method, product, or device that includes the elements.

[0039] In the following, the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0040] The above description is merely an illustration of preferred embodiments of the present invention and the technical principles employed, and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. The scope of the present invention is not limited to technical solutions formed by a specific combination of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the scope of the present invention. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features having similar functions disclosed in this invention.

Claims

1. A gearbox with a lubricating oil circuit, characterized in that: It includes a housing and an input shaft, a first shaft, a second shaft and a differential shaft arranged in the housing, each shaft is provided with a plurality of gears, and lubricating oil is provided in the housing; Part of the first gear on the outer wall of the two shafts is immersed in the lubricating oil so that the lubricating oil is raised to a preset height through the first gear. The housing is provided with a first oil channel at the preset height position. The first oil channel is an inclined oil channel and its low side is connected to the oil inlet of the first bearing chamber of the input shaft; the housing is also provided with a second oil channel, the high side of the second oil channel is connected to the oil outlet of the first bearing chamber, and the low side of the second oil channel is connected to the second bearing chamber of the two shafts.

2. The gearbox with lubricating oil circuit according to claim 1, characterized in that: The first bearing chamber is provided with an oil baffle at the oil outlet position thereof, and the oil baffle guides the lubricating oil into the interior of the first bearing chamber.

3. The gearbox with lubricating oil circuit according to claim 1, characterized in that: The housing is further provided with a third oil passage, the high side of which receives the lubricating oil splashed by the rotation of the first gear, and the low side of which is connected to the oil inlet of the third bearing chamber of the differential shaft.

4. The gearbox with lubricating oil circuit according to claim 3, characterized in that: The oil outlet of the third bearing chamber is connected to the second bearing chamber.

5. The gearbox with lubricating oil circuit according to claim 2, characterized in that: The fourth bearing chamber of the first shaft is immersed in the lubricating oil.

6. The gearbox with lubricating oil passage according to claim 3, characterized in that: The liquid level of the lubricating oil in the housing is lower than that of the second bearing chamber and the third bearing chamber.

7. The gearbox with lubricating oil passage according to claim 2, characterized in that: The oil baffle is made of rigid stainless steel or flexible rubber.

8. The gearbox with lubricating oil circuit according to claim 1, characterized in that: The first oil passage is a unidirectional linear oil passage, and a high side of the first oil passage is higher than the preset height, and a low side thereof is lower than the preset height.

9. The gearbox with a lubricating oil circuit according to claim 1, characterized in that: The second oil passage is a bent channel including a bent area, and the lubricating oil flows into the second bearing chamber after being buffered in the bent area.

10. The gearbox with a lubricating oil circuit according to any one of claims 1 to 9, characterized in that: The first gear is the largest gear among the multiple gears arranged on the outer walls of the two shafts.

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