Speed reducer shell of integrated lubricating structure and speed reducer

Abstract

The invention relates to the technical field of new energy electric drive, in particular to a speed reducer shell of an integrated lubricating structure and a speed reducer. The speed reducer shell comprises a shell body, the shell body comprises a left shell body and a right shell body, the left shell body and the right shell body are each of a cavity structure with one end open, a plurality of rib walls are arranged in each cavity structure, the rib walls divide the inner space of each cavity structure into a plurality of installation cavities, and the installation cavities comprise an oil collecting cavity, an input oil channel, an input shaft installation cavity, a middle shaft installation cavity and a differential mechanism installation cavity; one end of the input oil duct is communicated with the differential mounting cavity, and the other end of the input oil duct is communicated with the oil collecting cavity; the oil collecting cavity is communicated with the input shaft mounting cavity through a first oil duct; the oil collecting cavity is communicated with the intermediate shaft mounting cavity through a second oil duct; the oil collecting cavity is communicated with the differential mounting cavity through a third oil duct; and the input shaft mounting cavity is communicated with the intermediate shaft mounting cavity through a fourth oil duct. The device is high in integration level, compact in structure and wide in adaptation range, and makes obvious progress compared with the prior art.

Description

Technical Field

[0001] The present invention relates to the field of new energy electric drive technology, and in particular to a reducer housing and a reducer with an integrated lubrication structure. Background Art

[0002] As a key part of the new energy electric drive system, the reducer has mainly moving parts inside, including gear pairs, shafts, bearings, etc. Therefore, the operation quality, operating efficiency, NVH, and service life of the reducer system are closely related to the lubrication system. As the speed requirements of the electric drive assembly are getting higher and higher, a more effective reducer lubrication solution has become an issue that must be considered.

[0003] The existing lubrication solution mainly adds a lubricating oil groove to each bearing to collect the oil stirred up during the operation of the gear pair to lubricate the bearing. However, as the speed of the electric drive assembly increases, the lubrication effect of the existing solution is not ideal, and the failure problem is more prominent. In order to compensate for the failure problem, it usually takes multiple rounds of modification to achieve a good lubrication effect, resulting in a long time consumption. In addition, due to the increase in the number of gear pairs involved in stirring the oil, its work efficiency is also greatly reduced.

[0004] In the prior art, the Chinese invention patent named "Active Lubrication Structure of Speed ​​Reducer, Speed ​​Reducer and New Energy Vehicle" achieves the lubrication effect by adding filters and oil pumps to the speed reducer, allowing the oil to enter the oil pump through the filter, and then distribute the oil to each operating system that needs lubrication through the oil pump. The lubrication effect of this technical solution is good, but there is still room for improvement. Since this technology requires additional structures such as oil pumps and filters, the layout of its speed reducer requires a larger space; and the oil pump and filter of this solution need to be specially designed, which will increase the overall cost of the speed reducer; in addition, considering that the oil pump structure may be sucked in under some working conditions, this will also affect the stability of this solution.

[0005] In the invention application named "Integrated Electric Drive Housing and Electric Drive Assembly", an oil collecting box structure is added to the reducer. The oil collecting box structure can temporarily store the lubricating oil driven by the rotation of the reducer bearing, and then the lubricating oil is thrown to the reducer bearing again through the oil outlet side of the oil collecting box to perform secondary cooling on the reducer bearing, thereby improving the cooling efficiency of the reducer and the utilization rate of the lubricating oil. However, the oil collecting box of this scheme mainly throws the lubricating oil from the oil outlet side, and the circulation efficiency of the lubricating oil is low. In addition, the oil outlet side is directly aimed at the reducer bearing, which easily causes the lubricating oil thrown out by the oil collecting box and the incoming lubricating oil to directly cause turbulence, resulting in a decrease in flow efficiency, resulting in unsatisfactory lubrication effect of the reducer. Summary of the invention

[0006] In order to solve the shortcomings of the existing technology, the present invention designs a reducer housing and a reducer with an integrated lubrication structure. The present invention does not need to add additional structures such as an oil pump and a filter to the reducer to achieve a good lubrication effect. At the same time, the present invention has a high degree of integration, a compact structure, and a wide range of adaptation, which is a significant improvement over the existing technology.

[0007] The technical solution of the present invention is: a reducer housing with an integrated lubrication structure, comprising:

[0008] A reducer housing, the reducer housing comprising a left housing and a right housing, the left housing and the right housing both being cavity structures with one end open, connecting the open ends of the two together to form a complete cavity structure, the cavity structure comprising a plurality of rib walls, the rib walls dividing the internal space of the cavity structure into a plurality of installation cavities, including an input shaft installation cavity, an intermediate shaft installation cavity, a differential installation cavity and a ventilation cavity; the rib walls of the input shaft installation cavity, the intermediate shaft installation cavity, the differential installation cavity and the ventilation cavity and the cavity wall of the cavity structure enclose an oil collecting cavity; the arc-shaped channel between the rib wall of the differential installation cavity and the cavity wall of the cavity structure forms an input oil channel;

[0009] An opening is provided at the connection between the rib wall shared with the differential mounting cavity and the housing cavity wall on the oil collecting cavity; one end of the input oil passage is communicated with the differential mounting cavity, and the other end is communicated with the opening of the oil collecting cavity;

[0010] The oil collecting chamber is communicated with the input shaft installation chamber through a first oil passage;

[0011] The oil collecting chamber is communicated with the intermediate shaft installation chamber through a second oil passage;

[0012] The oil collecting chamber is communicated with the differential mounting chamber via a third oil passage;

[0013] The input shaft installation chamber is communicated with the intermediate shaft installation chamber through a fourth oil passage.

[0014] According to a reducer housing with an integrated lubrication structure provided by the present invention, a differential oil collecting chamber is also installed in the reducer housing. The upper end of the differential oil collecting chamber is open and directly connected to the input oil channel, and the lower end is connected to the differential installation chamber through a fifth oil channel.

[0015] According to a reducer housing with an integrated lubrication structure provided by the present invention, the oil collecting chamber includes a first rib wall, a second rib wall, a third rib wall and a fourth rib wall, the first rib wall being shared by the oil collecting chamber and the ventilation chamber, one end of which is connected to the chamber wall of the housing, and the other end of which is connected to the second rib wall; the second rib wall being shared by the oil collecting chamber and the input shaft mounting chamber, one end of which is connected to the first rib wall, and the other end of which is connected to the third rib wall; the third rib wall being shared by the oil collecting chamber and the intermediate shaft mounting chamber, one end of which is connected to the second rib wall, and the other end of which is connected to the fourth rib wall; the fourth rib wall being shared by the oil collecting chamber and the differential mounting chamber, one end of which is connected to the third rib wall, and the other end of which extends toward the opening of the oil collecting chamber.

[0016] According to a reducer housing with an integrated lubrication structure provided by the present invention, a stiffening rib is further provided in the oil collecting cavity, one end of the stiffening rib is connected to the cavity wall of the housing, and the other end extends downward but is not connected to the rib wall of the oil collecting cavity.

[0017] According to a reducer housing with an integrated lubrication structure provided by the present invention, the height of the installation position of the oil collecting chamber is higher than the heights of the installation positions of the input shaft installation chamber, the intermediate shaft installation chamber, and the differential installation chamber.

[0018] According to a reducer housing with an integrated lubrication structure provided by the present invention, the first oil channel includes a first oil channel left channel and a first oil channel right channel, the first oil channel left channel connects the oil collecting chamber on the left housing and the input shaft mounting chamber; the first oil channel right channel connects the oil collecting chamber on the right housing and the input shaft mounting chamber.

[0019] According to a reducer housing with an integrated lubrication structure provided by the present invention, the fourth oil passage includes a fourth oil passage left and a fourth oil passage right, the fourth oil passage left connecting the input shaft mounting cavity and the intermediate shaft mounting cavity on the left housing; the fourth oil passage right connecting the input shaft mounting cavity and the intermediate shaft mounting cavity on the right housing.

[0020] According to the reducer housing with an integrated lubrication structure provided by the present invention, the installation position of the differential oil collecting chamber is higher than the installation position of the differential installation chamber.

[0021] According to a reducer housing with an integrated lubrication structure provided by the present invention, sealants are provided at the opening ends of the left housing and the right housing along the circumferential direction.

[0022] Based on the same inventive concept, the present invention further provides a reducer, the reducer comprising a reducer housing with an integrated lubrication structure as described above, specifically comprising:

[0023] Reducer housing;

[0024] An input shaft, wherein the left side of the bearing of the input shaft is installed in the input shaft installation cavity in the left housing, and the right side of the bearing of the input shaft is installed in the input shaft installation cavity in the right housing;

[0025] An intermediate shaft, the left side of the intermediate shaft bearing is installed in the intermediate shaft installation cavity in the left housing, and the right side of the intermediate shaft bearing is installed in the intermediate shaft installation cavity in the right housing;

[0026] A differential, wherein the left side of the bearing of the differential is installed in the differential installation cavity in the left housing, and the right side of the bearing of the differential is installed in the differential installation cavity in the right housing.

[0027] The advantages of the present invention are:

[0028] 1. The present invention can achieve good lubrication effect without adding additional structures such as oil pumps and filters to the reducer. At the same time, the present invention has high integration, simple structure, and wide adaptability, which is a significant improvement over the prior art;

[0029] 2. The installation position of the oil collecting chamber in the present invention is higher than the input shaft installation chamber, the intermediate shaft installation chamber and the differential installation chamber, so that the lubricating oil can be passively circulated in each installation chamber, which helps to reduce energy consumption;

[0030] 3. The installation position height of the input shaft installation cavity in the present invention is not lower than the installation position of the intermediate shaft installation cavity, which helps the lubricating oil to passively flow from the input shaft installation cavity to the intermediate shaft installation cavity, saving energy consumption and improving the utilization efficiency of the lubricating oil;

[0031] 4. The first oil passage in the present invention includes a first oil passage left and a first oil passage right, which can lubricate the left and right sides of the bearing of the input shaft respectively, greatly enhancing the lubrication effect on the bearing of the input shaft;

[0032] 5. The fourth oil passage in the present invention includes a fourth oil passage left and a fourth oil passage right, which can lubricate the left and right sides of the intermediate shaft bearings respectively, greatly enhancing the lubrication effect on the intermediate shaft bearings;

[0033] 6. In the present invention, a differential oil collecting chamber is also installed in the reducer housing, and the differential oil collecting chamber can further enhance the lubrication effect for the differential;

[0034] 7. The installation position height of the differential oil collecting chamber in the present invention is higher than the differential installation chamber, which helps the lubricating oil in the differential oil collecting chamber to passively flow to the differential installation chamber, eliminating the need for active pressurizing structures such as oil pumps;

[0035] 8. In the present invention, the lubricating oil entering the input shaft installation cavity will enter the hollow reducer input shaft to lubricate the spline connecting the reducer input shaft and the motor shaft, which can effectively solve the problems of rust and fretting corrosion of the spline connection;

[0036] 9. In the present invention, sealants are provided at the open ends of the left shell and the right shell along the circumferential direction, which can effectively prevent the lubricating oil in the reducer housing from overflowing and increase the utilization rate of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the left shell of the reducer housing of the present invention;

[0038] Figure 2 It is a schematic structural diagram of the right shell of the reducer housing of the present invention;

[0039] Figure 3 The relative positions and structural diagrams of the oil collecting chamber, the input shaft mounting chamber, the intermediate shaft mounting chamber, and the differential mounting chamber of the present invention;

[0040] Figure 4 It is a schematic diagram of the oil circuit of the left shell of the reducer housing of the present invention;

[0041] Figure 5 It is a schematic diagram of the oil circuit of the right shell of the reducer housing of the present invention;

[0042] Figure 6 It is a structural schematic diagram of the reducer of the present invention;

[0043] Among them: housing 100; left housing 101; right housing 102; oil collecting chamber 1; first rib wall 11, second rib wall 12, third rib wall 13; fourth rib wall 14; stiffening rib 15; input oil passage 2; input shaft mounting chamber 3; intermediate shaft mounting chamber 4; differential mounting chamber 5; differential oil collecting chamber 6; fifth oil passage 61; first oil passage left passage 7a; first oil passage right passage 7b; second oil passage 8; third oil passage 9; fourth oil passage left passage 10a; fourth oil passage right passage 10b; input shaft 200; intermediate shaft 300; differential 400. DETAILED DESCRIPTION

[0044] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0045] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] The present invention relates to a reducer housing and reducer with an integrated lubrication structure, which can achieve a good lubrication effect without adding additional structures such as an oil pump and a filter to the reducer. At the same time, the present invention has a high degree of integration, a simple structure, and a wide range of adaptability, which is a significant improvement over the prior art.

[0049] A reducer housing with an integrated lubrication structure, specifically, Figure 1 , 2 As shown, including:

[0050] The housing 100 includes a left housing 101 and a right housing 102. The left housing 101 and the right housing 102 are both cavity structures with one end open. The open ends of the two are connected together to form a complete cavity structure. The cavity structure includes a plurality of rib walls. The rib walls divide the internal space of the cavity structure into a plurality of installation cavities, including an input shaft installation cavity 3, an intermediate shaft installation cavity 4, a differential installation cavity 5, and a ventilation cavity. The rib walls of the input shaft installation cavity 3, the intermediate shaft installation cavity 4, the differential installation cavity 5, and the ventilation cavity are surrounded by the cavity wall of the cavity structure to form an oil collecting cavity 1. The arc-shaped channel between the rib wall of the differential installation cavity 5 and the cavity wall of the cavity structure forms an input oil passage 2.

[0051] An opening is provided on the rib wall of the oil collecting chamber 1 shared with the differential mounting chamber 5; one end of the input oil passage 2 is communicated with the differential mounting chamber 5, and the other end is communicated with the opening of the oil collecting chamber 1;

[0052] The oil collecting chamber 1 is connected to the input shaft installation chamber 3 through a first oil passage;

[0053] The oil collecting chamber 1 is connected to the intermediate shaft installation chamber 4 through the second oil passage 8;

[0054] The oil collecting chamber 1 is connected to the differential mounting chamber 5 through a third oil passage 9;

[0055] The input shaft installation chamber 3 is communicated with the intermediate shaft installation chamber 4 through a fourth oil passage.

[0056] In actual operation, the oil collecting chamber 1 is used to collect the lubricating oil liquid rolled up in the differential mounting chamber 5 and redistribute it to make it flow to the input shaft mounting chamber 3, the intermediate shaft mounting chamber 4 and the differential mounting chamber 5 again.

[0057] The specific oil circuit of lubricating oil is as follows Figure 4 As shown, the lubricating oil in the differential mounting cavity 5 is rolled into the input oil passage 2 by the centrifugal force; a part of the lubricating oil in the input oil passage 2 will return to the differential mounting cavity 5 again due to its own gravity, and the other part will enter the oil collecting cavity 1 due to inertia;

[0058] Part of the lubricating oil entering the oil collecting chamber 1 flows into the input shaft installation chamber 3 through the first oil passage. In fact, an input shaft bearing is generally installed in the input shaft installation chamber 3. The input shaft bearing is connected to the hollow reducer input shaft. The reducer input shaft is connected to the motor shaft through a spline. The lubricating oil entering the input shaft installation chamber 3 will enter the hollow reducer input shaft to lubricate the spline connecting the reducer input shaft and the motor shaft, effectively solving the problems of rust and fretting corrosion of the spline connection. Part of the lubricating oil will be thrown into the fourth oil passage by centrifugal force and flow to the intermediate shaft installation chamber 4.

[0059] A portion of the lubricating oil entering the oil collecting chamber 1 flows into the intermediate shaft installation chamber 4 through the second oil passage 8. Since the second oil passage 8 is an open oil passage, a portion of the lubricating oil in the intermediate shaft installation chamber 4 is rolled into the second oil passage 8 by the action of centrifugal force and flows into the intermediate shaft installation chamber 4 again.

[0060] A portion of the lubricating oil entering the oil collecting chamber 1 flows into the differential mounting chamber 5 through the third oil passage 9 .

[0061] In some embodiments, the housing 100 is optimized, such as Figure 2 As shown, in this embodiment, a differential oil collecting chamber 6 is also installed in the housing 100. The upper end of the differential oil collecting chamber 6 is open and directly connected to the input oil channel 2, and the lower end is connected to the differential installation chamber 5 through the fifth oil channel 61.

[0062] During actual operation, the upper end of the differential oil collecting chamber 6 is open, and can directly receive a portion of the lubricating oil in the input oil channel 2. The lubricating oil collected in the differential oil collecting chamber 6 can directly flow to the differential mounting chamber 5 through the fifth oil channel 61, shortening the oil path of the lubricating oil and further improving the lubrication effect on the differential mounting chamber 5.

[0063] In some embodiments, the oil collecting chamber 1 is optimized, such as Figure 3 As shown, in this embodiment, the oil collecting chamber 1 includes a first rib wall 11, a second rib wall 12, a third rib wall 13 and a fourth rib wall 14. The first rib wall 11 is shared by the oil collecting chamber 1 and the ventilation chamber, one end of which is connected to the cavity wall of the housing 100, and the other end is connected to the second rib wall 12; the second rib wall 12 is shared by the oil collecting chamber 1 and the input shaft mounting chamber 3, one end of which is connected to the first rib wall 11, and the other end is connected to the third rib wall 13; the third rib wall 13 is shared by the oil collecting chamber 1 and the intermediate shaft mounting chamber 4, one end of which is connected to the second rib wall 12, and the other end is connected to the fourth rib wall 14; the fourth rib wall 14 is shared by the oil collecting chamber 1 and the differential mounting chamber 5, one end of which is connected to the third rib wall 13, and the other end extends to the opening of the oil collecting chamber 1.

[0064] In a specific embodiment, Figure 3 As shown, the first rib wall 11 is vertically arranged, and its upper end is connected to the top cavity wall of the housing 100, and the lower end extends to the upper part of the input shaft installation cavity 3 and is connected to one end of the arc-shaped second rib wall 12; the other end of the second rib wall 12 is connected to one end of the arc-shaped third rib wall 13; the third rib wall 13 is located above the intermediate shaft installation cavity 4, and the other end of the arc-shaped third rib wall 13 is connected to one end of the fourth rib wall 14; the fourth rib wall 14 extends obliquely upward, and an oil inlet opening of the oil collecting cavity 1 is formed between the other end of the fourth rib wall 14 and the top cavity wall of the housing 100, and the oil inlet opening is connected to the input oil channel 2; thereby, an oil collecting cavity 1 space with a larger upper portion and a smaller lower portion is formed, and this spatial structural arrangement can improve the integration of the ventilation cavity and the oil collecting cavity 1; and optimize the layout space inside the reducer;

[0065] Furthermore, the stiffening rib 15 is arranged at the upper part of the oil collecting chamber 1, and extends obliquely downward from the top cavity wall of the housing 100 to the input shaft installation chamber 3, and an oil storage gap is provided between the extended end of the stiffening rib 15 and the arc-shaped third rib wall 13. The stiffening rib 15 can increase the strength of the corresponding housing of the oil collecting chamber 1 space on the one hand, and can guide the lubricating oil splashed in from the oil inlet opening on the other hand.

[0066] Different from some prior arts in which an oil outlet is set between the upper end of the first rib wall 11 and the top cavity wall of the shell 100, this embodiment adopts a closed design concept in which the upper end of the first rib wall 11 of the oil collecting chamber 1 is directly connected to the top cavity wall of the shell 100; in the prior art, an oil outlet is set on the oil collecting chamber 1 in order to improve the lubrication and cooling effect when the lubricating oil splashes out of the oil collecting chamber 1, but in fact, not only is the lubrication and cooling effect limited, but it also increases the impact between the lubricating oil and the air at the air inlet at the lower part of the ventilation chamber, thereby increasing the turbulent energy consumption of the lubricating oil inside the reducer cavity; this embodiment adopts a closed design concept, which can greatly reduce the turbulent energy consumption of the lubricating oil inside the reducer cavity.

[0067] In actual operation, the oil collecting chamber 1 shares the rib wall with the input shaft mounting chamber 3, the intermediate shaft mounting chamber 4, the differential mounting chamber 5 and the ventilation chamber, which can improve the utilization rate of the space in the housing 100 on the one hand, and save the material and manufacturing cost of the housing 100 on the other hand.

[0068] In some embodiments, the oil collecting chamber 1 is further optimized, such as Figure 3 , 4 As shown in FIG. 5 , in this embodiment, a stiffening rib 15 is further provided in the oil collecting chamber 1 , one end of the stiffening rib 15 is connected to the chamber wall of the shell 100 , and the other end extends downward but is not connected to the rib wall of the oil collecting chamber 1 .

[0069] In actual operation, the stiffening rib 15 is not only used to maintain and reinforce the cavity space of the oil collecting chamber 1, but also can buffer and divert the lubricating oil entering the oil collecting chamber 1 from the input oil channel 2, on the one hand, to prevent the lubricating oil from causing impact on the rib wall of the oil collecting chamber 1 and the cavity wall of the shell 100 due to excessive inertia, causing loss of the rib wall or the cavity wall and resulting in leakage; on the other hand, the upper end of the stiffening rib 15 is connected to the cavity wall of the shell 100, and the lower end points to the entrance of the first oil channel, the second oil channel 8 and the third oil channel 9, which guides the lubricating oil, so that the lubricating oil can quickly and accurately flow through the first oil channel, the second oil channel 8 and the third oil channel 9 to the input shaft mounting cavity 3, the intermediate shaft mounting cavity 4 and the differential mounting cavity 5.

[0070] In some embodiments, the positional relationship between the cavities in the housing 100 is optimized, such as Figures 1 to 5As shown, in this embodiment, the height of the installation position of the oil collecting chamber 1 is higher than the height of the installation positions of the input shaft installation chamber 3, the intermediate shaft installation chamber 4, and the differential installation chamber 5.

[0071] During actual operation, since the height of the oil collecting chamber 1 is higher than the input shaft mounting chamber 3, the intermediate shaft mounting chamber 4 and the differential mounting chamber 5, the lubricating oil in the oil collecting chamber 1 will spontaneously flow to the input shaft mounting chamber 3, the intermediate shaft mounting chamber 4 and the differential mounting chamber 5 due to its own gravity. This passive lubricating oil flow mode can effectively reduce energy consumption. At the same time, active pressurizing components such as oil pumps are eliminated, making the structure of the reducer more compact and reducing the manufacturing cost of the reducer.

[0072] In some embodiments, the first oil channel is optimized, such as Figure 1 , 2 As shown, in this embodiment, the first oil channel includes a first oil channel left channel 7a and a first oil channel right channel 7b. The first oil channel left channel 7a connects the oil collecting chamber 1 on the left shell 101 with the input shaft mounting chamber 3; the first oil channel right channel 7b connects the oil collecting chamber 1 on the right shell 102 with the input shaft mounting chamber 3.

[0073] In actual operation, the first left oil passage 7a and the first right oil passage 7b can simultaneously deliver lubricating oil to the input shaft installation cavity 3, thereby improving the lubrication effect on the components in the input shaft installation cavity 3. In fact, the input shaft installation cavity 3 is generally used to install the input shaft bearing, wherein the first left oil passage 7a is used to lubricate the left side of the input shaft bearing; and the first right oil passage 7b is used to lubricate the right side of the input shaft bearing.

[0074] In some embodiments, the fourth oil channel is optimized, such as Figure 1 , 2 As shown, in this embodiment, the fourth oil passage includes a fourth oil left passage 10a and a fourth oil right passage 10b. The fourth oil left passage 10a connects the input shaft mounting cavity 3 and the intermediate shaft mounting cavity 4 on the left housing 101; the fourth oil right passage 10b connects the input shaft mounting cavity 3 and the intermediate shaft mounting cavity 4 on the right housing 102.

[0075] In actual operation, the fourth left oil passage 10a and the fourth right oil passage 10b can simultaneously deliver lubricating oil to the intermediate shaft installation cavity 4, thereby improving the lubrication effect on the components in the intermediate shaft installation cavity 4. In fact, the intermediate shaft installation cavity 4 is generally used to install the intermediate shaft bearing, wherein the fourth left oil passage 10a is used to lubricate the left side of the intermediate shaft bearing; and the fourth right oil passage 10b is used to lubricate the right side of the intermediate shaft bearing.

[0076] In some embodiments, the differential oil collecting chamber 6 is optimized, such as Figure 2 , 5As shown, in this embodiment, the installation position of the differential oil collecting chamber 6 is higher than the installation position of the differential installation chamber 5 .

[0077] During actual operation, since the height of the differential oil collecting chamber 6 is higher than the differential mounting chamber 5, the lubricating oil in the differential oil collecting chamber 6 will spontaneously flow through the fifth oil channel 61 to the differential mounting chamber 5 due to its own gravity. This passive lubricating oil flow mode can effectively reduce energy consumption. At the same time, active pressurizing components such as oil pumps are eliminated, making the structure of the reducer more compact and reducing the manufacturing cost of the reducer.

[0078] The specific oil circuit of the lubricating oil of the right shell is as follows Figure 5 As shown, the lubricating oil in the differential mounting cavity 5 is rolled into the input oil channel 2 due to the action of centrifugal force; a part of the lubricating oil in the input oil channel 2 will flow into the differential oil collecting cavity 6 due to its own gravity, and the other part will enter the oil collecting cavity 1 due to inertia; a part of the lubricating oil that enters the oil collecting cavity 1 flows into the input shaft mounting cavity 3 through the first oil channel right channel 7b; a part of the lubricating oil that enters the input shaft mounting cavity 3 will be thrown into the fourth oil channel right channel 10b due to centrifugal force and flow to the intermediate shaft mounting cavity 4; the lubricating oil in the differential oil collecting cavity 6 flows into the differential mounting cavity 5 through the fifth oil channel 61 due to its own gravity; preferably, an opening is provided on the rib wall of the intermediate shaft mounting cavity 4 that is shared with the differential mounting cavity 5, and a part of the lubricating oil in the differential mounting cavity 5 is rolled to the opening due to the action of centrifugal force and flows into the intermediate shaft mounting cavity 4.

[0079] In some embodiments, the left shell 101 and the right shell 102 are optimized. Figure 1 , 2 As shown, sealant is provided on the open ends of the left shell 101 and the right shell 102 along the circumferential direction.

[0080] During actual operation, since the open ends of the left shell 101 and the right shell 102 are provided with sealants along the circumferential direction, when the two are connected together to form a complete reducer housing 100, the lubricating oil will not be thrown out of the housing 100 due to the operation of the internal structure of the housing 100, thereby avoiding the waste of the lubricating oil in the housing 100 and ensuring the utilization rate of the lubricating oil.

[0081] A reducer, comprising a reducer housing with an integrated lubrication structure as described above, specifically, Figure 6 As shown, including:

[0082] Housing 100;

[0083] An input shaft 200, the left side of the bearing of the input shaft 200 is installed in the input shaft installation cavity 3 in the left housing 101, and the right side of the bearing is installed in the input shaft installation cavity 3 in the right housing 102;

[0084] An intermediate shaft 300, the left side of the bearing of the intermediate shaft 300 is installed in the intermediate shaft installation cavity 4 in the left housing 101, and the right side of the bearing is installed in the intermediate shaft installation cavity 4 in the right housing 102;

[0085] The differential 400 has a bearing on the left side mounted in the differential mounting cavity 5 in the left housing 101 , and a bearing on the right side mounted in the differential mounting cavity 5 in the right housing 102 .

[0086] During actual operation, the first oil passage left channel 7a located in the left housing 101 communicates with the oil collecting chamber 1 and the input shaft installation chamber 3, and provides lubricating oil liquid for the left side of the bearing of the input shaft 200; the first oil passage right channel 7b located in the right housing 102 communicates with the oil collecting chamber 1 and the input shaft installation chamber 3, and provides lubricating oil liquid for the right side of the bearing of the input shaft 200; since the bearing of the input shaft 200 is connected to the hollow reducer input shaft, and the reducer input shaft is connected to the motor shaft through a spline, the lubricating oil liquid entering the input shaft installation chamber 3 will enter the hollow reducer input shaft, and provide lubrication for the spline connecting the reducer input shaft and the motor shaft;

[0087] The fourth oil passage left channel 10a located in the left housing 101 communicates with the oil collecting chamber 1 and the intermediate shaft installation chamber 4, and provides lubricating oil to the left side of the bearing of the intermediate shaft 300; the fourth oil passage right channel 10b located in the right housing 102 communicates with the oil collecting chamber 1 and the input shaft installation chamber 3, and provides lubricating oil to the right side of the bearing of the intermediate shaft 300;

[0088] The second oil passage 8 located in the left housing 101 communicates with the oil collecting chamber 1 and the intermediate shaft installation chamber 4 to provide lubricating oil for the gears of the intermediate shaft 300;

[0089] The third oil passage 9 located in the left housing 101 communicates with the oil collecting chamber 1 and the differential installation chamber 5, and provides lubricating oil to the left side of the bearing of the differential 400;

[0090] The fifth oil passage 61 located on the right shell 102 connects the differential oil collecting chamber 6 and the differential mounting chamber 5 to provide lubricating oil to the internal structure of the differential 400; further, a sixth oil passage may be provided on the right shell 102, and the sixth oil passage is used to connect the differential oil collecting chamber 6 and the differential mounting chamber 5 on the right shell 102 to provide lubricating oil to the right side of the bearing of the differential 400.

[0091] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A reducer housing with an integrated lubrication structure, characterized in that: include: A housing (100), the housing (100) comprising a left housing (101) and a right housing (102), the left housing (101) and the right housing (102) both being cavity structures with one end open, and the open ends of the two being connected together to form a complete cavity structure, the cavity structure comprising a plurality of rib walls, the rib walls dividing the internal space of the cavity structure into a plurality of installation cavities, including an input shaft installation cavity (3), an intermediate shaft installation cavity (4), a differential installation cavity (5) and a ventilation cavity; the rib walls of the input shaft installation cavity (3), the intermediate shaft installation cavity (4), the differential installation cavity (5) and the ventilation cavity and the cavity wall of the cavity structure enclose an oil collecting cavity (1); the arc-shaped channel between the rib wall of the differential installation cavity (5) and the cavity wall of the cavity structure forms an input oil passage (2); An opening is provided at the connection between the rib wall shared by the differential mounting cavity (5) and the cavity wall of the housing (100) on the oil collecting cavity (1); one end of the input oil passage (2) is in communication with the differential mounting cavity (5), and the other end is in communication with the opening of the oil collecting cavity (1); The oil collecting chamber (1) is in communication with the input shaft mounting chamber (3) via a first oil passage; the oil collecting chamber (1) is in communication with the intermediate shaft mounting chamber (4) via a second oil passage (8); the oil collecting chamber (1) is in communication with the differential mounting chamber (5) via a third oil passage (9); and the input shaft mounting chamber (3) is in communication with the intermediate shaft mounting chamber (4) via a fourth oil passage.

2. A reducer housing with an integrated lubrication structure as claimed in claim 1, characterized in that: A differential oil collecting chamber (6) is also installed in the housing (100); the upper end of the differential oil collecting chamber (6) is open and directly connected to the input oil passage (2), and the lower end is connected to the differential installation chamber (5) through a fifth oil passage (61).

3. A reducer housing with an integrated lubrication structure as claimed in claim 1, characterized in that: The oil collecting chamber (1) comprises a first rib wall (11), a second rib wall (12), a third rib wall (13) and a fourth rib wall (14); the first rib wall (11) is shared by the oil collecting chamber (1) and the ventilation chamber, one end of which is connected to the chamber wall of the housing (100) and the other end is connected to the second rib wall (12); the second rib wall (12) is shared by the oil collecting chamber (1) and the input shaft mounting chamber (3), one end of which is connected to the first rib wall (11) and the other end is connected to the third rib wall (13); the third rib wall (13) is shared by the oil collecting chamber (1) and the intermediate shaft mounting chamber (4), one end of which is connected to the second rib wall (12) and the other end is connected to the fourth rib wall (14); the fourth rib wall (14) is shared by the oil collecting chamber (1) and the differential mounting chamber (5), one end of which is connected to the third rib wall (13) and the other end extends toward the opening of the oil collecting chamber (1).

4. A reducer housing with an integrated lubrication structure as claimed in claim 3, characterized in that: A stiffening rib (15) is also provided in the oil collecting cavity (1), one end of the stiffening rib (15) being connected to the cavity wall of the shell (100), and the other end of the stiffening rib (15) extending downward but not connected to the rib wall of the oil collecting cavity (1).

5. A reducer housing with an integrated lubrication structure as claimed in claim 4, characterized in that: The height of the installation position of the oil collecting chamber (1) is higher than the height of the installation positions of the input shaft installation chamber (3), the intermediate shaft installation chamber (4), and the differential installation chamber (5).

6. A reducer housing with an integrated lubrication structure as claimed in claim 1, characterized in that: The first oil passage comprises a first left oil passage (7a) and a first right oil passage (7b); the first left oil passage (7a) connects the oil collecting chamber (1) on the left housing (101) with the input shaft mounting chamber (3); the first right oil passage (7b) connects the oil collecting chamber (1) on the right housing (102) with the input shaft mounting chamber (3).

7. A reducer housing with an integrated lubrication structure as claimed in claim 1, characterized in that: The fourth oil passage comprises a fourth oil passage left passage (10a) and a fourth oil passage right passage (10b); the fourth oil passage left passage (10a) is connected to the input shaft installation cavity (3) and the intermediate shaft installation cavity (4) on the left housing (101); the fourth oil passage right passage (10b) is connected to the input shaft installation cavity (3) and the intermediate shaft installation cavity (4) on the right housing (102).

8. A reducer housing with an integrated lubrication structure as claimed in claim 2, characterized in that: The installation position of the differential oil collecting chamber (6) is higher than the installation position of the differential installation chamber (5).

9. A reducer housing with an integrated lubrication structure as claimed in any one of claims 1, 6 and 7, characterized in that: The open ends of the left shell (101) and the right shell (102) are provided with sealant along the circumferential direction.

10. A reducer, characterized in that: The reducer comprises a reducer housing with an integrated lubrication structure as claimed in any one of claims 1 to 9, specifically comprising: Housing (100); An input shaft (200), wherein the left side of the bearing of the input shaft (200) is installed in the input shaft installation cavity (3) in the left housing (101), and the right side of the bearing of the input shaft (200) is installed in the input shaft installation cavity (3) in the right housing (102); An intermediate shaft (300), wherein the left side of the bearing of the intermediate shaft (300) is installed in the intermediate shaft installation cavity (4) in the left housing (101), and the right side of the bearing of the intermediate shaft (300) is installed in the intermediate shaft installation cavity (4) in the right housing (102); A differential (400), wherein the left side of the bearing of the differential (400) is installed in the differential installation cavity (5) in the left housing (101), and the right side of the bearing of the differential (400) is installed in the differential installation cavity (5) in the right housing (102).

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