Reduction gear, transmission and engineering machine

Abstract

The application provides a reducer, a transmission mechanism and an engineering machine, wherein the reducer comprises a housing, the housing comprising a flow inlet and at least two flow outlets. A bevel gear set is arranged in the housing and is used for being connected with an external power source. A connecting gear set is arranged in the housing and is engaged with the bevel gear set. A first planetary gear train is arranged in the housing and is engaged with the connecting gear set, the first planetary gear train comprising a first central shaft, a first through hole being arranged along an axis of the first central shaft. A second planetary gear train is arranged in the housing and is engaged with the connecting gear set, the second planetary gear train comprising a second central shaft, a second through hole being arranged along an axis of the second central shaft. A cooling assembly comprises a connecting cavity, an inflow channel and at least two outflow channels, the connecting cavity being located between the first planetary gear train and the second planetary gear train, the inflow channel being communicated with the flow inlet and the connecting cavity. The outflow channels are communicated with the connecting cavity and the flow outlets, and the outflow channels are arranged in the first through hole or the second through hole.

Description

Technical Field

[0001] This invention relates to the field of construction machinery, and more specifically, to a speed reducer, a transmission mechanism, and construction machinery. 。 Background Technology

[0002] Currently, reducers consist of a single-stage helical gear, a single-stage bevel gear, and two planetary gear trains. Power is input from the helical gear and output from the planetary gear trains. However, the bevel gear is located in the second stage, requiring a larger size to meet the required load-bearing capacity, resulting in higher manufacturing costs. When using an internal spray system, this can lead to poor reducer stability.

[0003] Therefore, how to propose a reducer structure with good sealing effect and high strength when using internal spray has become an urgent technical problem to be solved. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this application proposes a reducer structure with good sealing effect and high strength during internal spraying.

[0005] The first objective of this invention is to provide a speed reducer.

[0006] The second objective of this invention is to provide a transmission mechanism.

[0007] The third objective of this invention is to provide an engineering machine.

[0008] To achieve the above objectives, the first aspect of the present invention provides a speed reducer for use in engineering machinery. The speed reducer includes: a housing with an inlet and at least two outlets; a bevel gear set disposed within the housing for connection to an external power source; a connecting gear set disposed within the housing and meshing with the bevel gear set; a first planetary gear train disposed within the housing and meshing with the connecting gear set, the first planetary gear train including a first central shaft and a first through hole along the axis of the first central shaft; a second planetary gear train disposed within the housing and meshing with the connecting gear set, the second planetary gear train including a second central shaft and a second through hole along the axis of the second central shaft; and a cooling assembly including a connecting cavity, an inflow channel, and at least two outlet channels, the connecting cavity being located between the first and second planetary gear trains, the inflow channels communicating with the inlet and the connecting cavity; and the outlet channels communicating with the connecting cavity and the outlets, and the outlet channels passing through either the first or second through hole.

[0009] The reducer provided by the technical solution of the present invention includes: a housing, the housing having an inlet and at least two outlets; a bevel gear set disposed within the housing for connection to an external power source; a connecting gear set disposed within the housing and meshing with the bevel gear set; a first planetary gear train disposed within the housing and meshing with the connecting gear set, the first planetary gear train including a first central shaft and having a first through hole along the axis of the first central shaft; a second planetary gear train disposed within the housing and meshing with the connecting gear set, the second planetary gear train including a second central shaft and having a second through hole along the axis of the second central shaft; and a cooling assembly including a connecting cavity, an inflow channel, and at least two outlet channels, the connecting cavity being located between the first and second planetary gear trains, the inflow channels communicating with the inlet and the connecting cavity; and the outlet channels communicating with the connecting cavity and the outlets, and the outlet channels passing through the first or second through hole, such that the cooling medium in the outlet channels can cool the shaft of the planetary gear train. By setting multiple spur gears in the bevel gear set for power transmission, the strength of the reducer can be effectively improved. At the same time, by setting the two planetary gear trains separately, the rotation between the two is asynchronous, which ensures that the same module gears can bear greater torque, improves the strength that the reducer can withstand, and provides space for the cooling components, which can be set between the two planetary gear trains. The pipeline design at this point can effectively reduce the linear velocity at the rotary seal, allowing the pipeline to use a smaller diameter, further improving the service life of the equipment.

[0010] Furthermore, the cooling assembly also includes at least one drain channel communicating with the outside of the connecting cavity and the housing; at least two end caps respectively disposed on both sides of the connecting cavity; a connecting portion disposed within the housing, which together with the two end caps forms the connecting cavity; a first sealing device disposed between the inner wall surface of the connecting cavity and the outer wall surface of the outflow channel, and also disposed between the inflow channel and the drain channel, for sealing the connecting cavity and the drain channel; and a second sealing device disposed between the inner wall surface of the connecting cavity and the outer wall surface of the outflow channel, and also disposed between the end caps and the drain channel, for sealing the end caps and the connecting portion.

[0011] In this technical solution, the cooling assembly further includes at least two end caps, which are respectively disposed on both sides of the connecting cavity. The cooling assembly also includes a connecting portion, which is disposed within the housing and encloses the connecting cavity with the at least two end caps. The cooling assembly also includes a first sealing device, which is disposed between the inner wall of the connecting cavity and the outer wall of the outflow channel, and simultaneously between the inflow channel and the discharge channel. This first sealing device seals the connecting cavity and the discharge channel. Before the first sealing device fails, cooling medium will not flow into the discharge channel. When the first sealing device fails, the discharge channel connects the connecting cavity and the alarm device, thereby triggering the alarm device and alerting the user that the first sealing device has failed and the sealing effect of the connecting cavity has decreased, requiring replacement of the cooling assembly. The cooling assembly also includes a second sealing device, which is disposed similarly to the first sealing device, between the inner wall of the connecting cavity and the outer wall of the outflow channel. However, the second sealing device is disposed between the end caps and the discharge channel. When the first sealing device fails, the second sealing device ensures that the cooling medium in the connecting cavity flows out of the connecting portion, effectively preventing oil-water mixing and thus improving the service life of the reducer.

[0012] Furthermore, the reducer also includes an alarm device, mounted on the housing, for sending alert messages. The venting channel communicates with the connecting cavity and the alarm device.

[0013] In this technical solution, the reducer also includes an alarm device installed on the housing, which can send reminder information. At the same time, the cooling component also includes at least one drain channel, which is connected between the alarm device and the connecting cavity. When the cooling medium flows from the connecting cavity to the alarm channel through the drain channel, the alarm device will issue an alarm message to remind the user that the sealing effect of the reducer has deteriorated and needs to be repaired.

[0014] Furthermore, the cooling assembly also includes a cooler disposed within the housing, one end of which is connected to an inlet and the other end of which is connected to an inflow channel; the cooler is capable of cooling the lubricating oil within the reducer.

[0015] In this technical solution, the cooling assembly also includes a cooler, which is installed inside the housing. The cooler is connected to the inlet and the inflow channel. At this time, the inflow channel is no longer directly connected to the inlet. The cooler can cool the lubricating oil in the reducer, thereby improving the cooling effect of the cooling assembly.

[0016] Furthermore, the cooling assembly also includes: a top cover assembly disposed on the housing, the top cover assembly including a first cavity communicating with a connecting cavity and an inlet.

[0017] In this technical solution, the cooling assembly also includes a top cover assembly. The top cover assembly includes a first cavity that communicates with the connecting cavity and the inlet. In this case, the inflow channel is no longer directly connected to the inlet. Because the top cover assembly is mounted on the housing, the entire cooling assembly can be more easily disassembled and replaced. Simultaneously, an observation hole can be provided on the top cover assembly to facilitate observation of the internal gear operation. The observation hole needs to be covered with a flange to prevent dust and falling rocks from affecting the gears inside the reducer.

[0018] Furthermore, the top cover assembly also includes a second cavity, in which an alarm device is disposed, and a discharge channel communicates with the second cavity and the connecting cavity.

[0019] In this technical solution, the top cover assembly also includes a second cavity, which is equipped with an alarm device. A drain channel connects the second cavity and the connecting cavity. When cooling medium flows into the second cavity from the drain channel, the alarm device is triggered, thus alerting the user to a problem with poor sealing. This allows for timely replacement of the connecting cavity.

[0020] Furthermore, the second cavity can be made transparent and placed in a position that is convenient for the user to observe. When the cooling medium flows into the second cavity, there is no need to install an alarm device, and the user can also judge the sealing effect of the first sealing device by direct observation.

[0021] Furthermore, the connecting gear set includes: a first gear set that meshes with a bevel gear set; a second gear set that meshes with the first gear set; a third gear set that meshes with the second gear set; a fourth gear set that meshes with the second gear set; a first planetary gear train that meshes with the third gear set; and a second planetary gear train that meshes with the fourth gear set.

[0022] In this technical solution, the connecting gear set includes: a first gear set, which includes gears meshing with a bevel gear set and coaxially arranged spur gears; a second gear set, which includes gears meshing with the spur gears in the first gear set and spur gears of the same module arranged on both sides; a third gear set located on one side of the second gear set, whose external gears can mesh with some of the spur gears in the second gear set; and a fourth gear set located on the other side of the second gear set, whose external gears can mesh with some of the spur gears in the second gear set. The internal gears of the first planetary gear train and the third gear set mesh, and the internal gears of the second planetary gear train and the fourth gear set mesh. The power from the bevel gear set is transmitted to the first and second planetary gear trains through the connecting gear set, thus realizing power transmission. Furthermore, by placing the bevel gear set at the location of the greatest power source, the strength of the reducer can be effectively improved.

[0023] Furthermore, the connecting gear set also includes: a first fixed bearing disposed at both ends of the first gear set for fixing the first gear set to the housing; a second fixed bearing disposed at both ends of the second gear set for fixing the second gear set to the housing; a third fixed bearing disposed at both ends of the third gear set for fixing the third gear set to the housing; and a fourth fixed bearing disposed at both ends of the fourth gear set for fixing the fourth gear set to the housing; wherein the first and second fixed bearings include tapered roller bearings, the third fixed bearing includes self-aligning roller bearings, and the fourth fixed bearing includes cylindrical roller bearings.

[0024] In this technical solution, the connecting gear set further includes: a first fixed bearing, disposed at both ends of the first gear set, for fixing the first gear set to the housing; a second fixed bearing, disposed at both ends of the second gear set, for fixing the second gear set to the housing; a third fixed bearing, disposed at both ends of the third gear set, for fixing the third gear set to the housing; and a fourth fixed bearing, disposed at both ends of the fourth gear set, for fixing the fourth gear set to the housing. The first and second fixed bearings include tapered roller bearings to withstand axial loads. The third fixed bearing includes a self-aligning roller bearing. The fourth fixed bearing includes a cylindrical roller bearing, which facilitates installation and helps reduce axial dimensions.

[0025] Furthermore, the first planetary gear train includes: a first planetary gear, a first sun gear, and a first planet carrier, wherein the first sun gear meshes with the first planetary gear and the first sun gear meshes with a connecting gear set, and the first planet carrier meshes with the first planetary gear; the second planetary gear train includes: a second planetary gear, a second sun gear, and a second planet carrier, wherein the second sun gear meshes with the second planetary gear and the second sun gear meshes with a connecting gear set, and the second planet carrier meshes with the second planetary gear; the first planetary gear train and the second planetary gear train are coaxially arranged.

[0026] In this technical solution, the first planetary gear train includes: a first planetary gear, a first sun gear, and a first planet carrier, wherein the first sun gear meshes with the first planetary gear and also meshes with a connecting gear set, and the first planet carrier meshes with the first planetary gear; the second planetary gear train includes: a second planetary gear, a second sun gear, and a second planet carrier, wherein the second sun gear meshes with the second planetary gear and also meshes with a connecting gear set, and the second planet carrier meshes with the second planetary gear; the first and second planetary gear trains are coaxially arranged. The completely symmetrical arrangement of the first and second planetary gear trains ensures that, during normal operation, a certain space is created between the first and second planetary gear trains for installing cooling components, thereby cooling the sun gears of both trains. Simultaneously, one end of the first sun gear meshes with the first planetary gear, and the other end meshes with the internal gear of the third gear set, thus transmitting power from the third gear set to the first sun gear.

[0027] The second aspect of the present invention provides a transmission mechanism, comprising: a reducer according to any one of the first aspects of the present invention.

[0028] The third aspect of the present invention provides an engineering machinery, comprising: a reducer of any one of the first aspects of the above-described technical solutions; and / or a transmission mechanism of any one of the second aspects of the above-described technical solutions.

[0029] Construction machinery can include: coal mining machines, heavy trucks, trailers, excavators, roadheaders, bulldozers, road rollers, and concrete pump trucks, or mechanical equipment such as tower cranes, construction hoists, and material hoists.

[0030] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is a schematic diagram of a speed reducer structure according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the reducer structure according to the second embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the reducer structure according to the third embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the reducer structure according to the fourth embodiment of the present invention.

[0036] Figure 5 This is a schematic diagram of the reducer structure according to the fifth embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the reducer structure according to the sixth embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the reducer structure according to the seventh embodiment of the present invention;

[0039] Figure 8 This is an embodiment provided by the present invention. Figure 3 A magnified structural diagram of point A in the middle.

[0040] in, Figures 1 to 8 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0041] 1. Housing; 11. Inlet; 12. Outlet; 2. Bevel gear set; 3. Connecting gear set; 30. First gear set; 31. First fixed bearing; 32. Second gear set; 33. Second fixed bearing; 34. Third gear set; 35. Third fixed bearing; 36. Fourth gear set; 37. Fourth fixed bearing; 4. First planetary gear train; 41. First planetary gear; 42. First sun gear; 43. First planetary carrier; 5. Second planetary gear train; 51. Second planetary gear; 52. Second sun gear; 53. Second planetary carrier; 6. Cooling assembly; 60. Connecting cavity; 61. End cover; 62. Connecting part; 63. Inflow channel; 64. Outflow channel; 65. Drainage channel; 66. First sealing device; 67. Second sealing device; 68. Cooler; 7. Alarm device; 8. Top cover assembly; 82. First cavity; 84. Second cavity. Detailed Implementation

[0042] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0044] The following reference Figures 1 to 8 A speed reducer provided according to some embodiments of the present invention is described.

[0045] To achieve the above objectives, an embodiment of the first aspect of the present invention provides a speed reducer for use in engineering machinery. For example... Figure 1 and Figure 2As shown, the reducer includes: a housing 1, which has an inlet 11 and at least two outlets 12; a bevel gear set 2, disposed within the housing 1, for connection to an external power source; a connecting gear set 3, disposed within the housing 1, meshing with the bevel gear set 2; a first planetary gear train 4, disposed within the housing 1, meshing with the connecting gear train 3, the first planetary gear train 4 including a first central shaft, and having a first through hole along the axis of the first central shaft; and a second planetary gear train 5, disposed within the housing 1, meshing with the connecting gear train 3, the second planetary gear train 5 including a second central shaft, and having a second through hole along the axis of the second central shaft. Figure 3 and Figure 8 As shown, the cooling assembly 6 includes a connecting cavity 60, an inflow channel 63, and at least two outflow channels 64. The connecting cavity 60 is located between the first planetary gear train 4 and the second planetary gear train 5. The inflow channel 63 communicates with the inlet 11 and the connecting cavity 60. The outflow channels 64 communicate with the connecting cavity 60 and the outlet 12, and the outflow channels 64 pass through the first through hole or the second through hole.

[0046] The reducer provided according to an embodiment of the present invention includes: a housing 1, the housing 1 including an inlet 11 and at least two outlets 12; a bevel gear set 2, disposed within the housing 1 for connection to an external power source; a connecting gear set 3, disposed within the housing 1 and meshing with the bevel gear set 2; a first planetary gear train 4, disposed within the housing 1 and meshing with the connecting gear set 3, the first planetary gear train 4 including a first central shaft and having a first through hole along the axis of the first central shaft; a second planetary gear train 5, disposed within the housing 1 and meshing with the connecting gear set 3, the second planetary gear train 5 including a second central shaft and having a second through hole along the axis of the second central shaft; and a cooling assembly 6 including a connecting cavity 60, an inflow channel 63, and at least two outlet channels 64, the connecting cavity 60 being located between the first planetary gear train 4 and the second planetary gear train 5, and the inflow channel 63 communicating with the inlet 11 and the connecting cavity 60. The outflow channel 64 communicates with the connecting cavity 60 and the outlet 12, and the outflow channel 64 passes through the first or second through hole, allowing the cooling medium in the outflow channel 64 to cool the shaft of the planetary gear train. By setting multiple spur gears after the bevel gear for power transmission, the strength of the reducer can be effectively improved. At the same time, by setting the two planetary gear trains separately, the rotation between the two can be asynchronous, thereby ensuring that the same module and number of teeth can bear greater torque, improving the strength that the reducer can withstand, and providing space for the cooling component 6, which can be set between the two planetary gear trains. The pipeline design at this point can effectively reduce the linear velocity at the rotary seal, allowing the pipeline to use a smaller diameter, further improving the service life of the equipment.

[0047] Furthermore, the reducer also includes: an alarm device 7, which is disposed on the housing 1 for sending reminder information; the cooling assembly 6 also includes at least one drain channel 65, which communicates with the connecting cavity 60 and the alarm device 7.

[0048] In this embodiment, such as Figure 4 As shown, the reducer also includes an alarm device 7, which is installed on the housing 1 and can send reminder information. At the same time, the cooling assembly 6 also includes at least one drain channel 65, which is connected between the alarm device 7 and the connecting cavity 60. When the cooling medium flows from the connecting cavity 60 to the alarm channel through the drain channel 65, the alarm device 7 will issue an alarm message to remind the user that the sealing effect of the reducer has decreased and needs to be repaired.

[0049] Furthermore, the cooling assembly 6 also includes: at least two end caps 61, respectively disposed on both sides of the connecting cavity 60; a connecting portion 62, disposed within the housing 1, and together with the two end caps 61 forming the connecting cavity 60; a first sealing device 66, disposed between the inner wall surface of the connecting cavity 60 and the outer wall surface of the outflow channel 64, and also disposed between the inflow channel 63 and the outflow channel 65, for sealing the connecting cavity 60 and the outflow channel 65; and a second sealing device 67, disposed between the inner wall surface of the connecting cavity 60 and the outer wall surface of the outflow channel 64, and also disposed between the end caps 61 and the outflow channel 65, for sealing the end caps 61 and the connecting portion 62.

[0050] In this embodiment, such as Figure 8As shown, the cooling assembly 6 also includes at least two end caps 61, which are respectively disposed on both sides of the connecting cavity 60. The cooling assembly 6 also includes a connecting part 62, which is disposed inside the housing 1 and encloses the connecting cavity 60 with the at least two end caps 61. The cooling assembly 6 also includes a first sealing device 66, which is disposed between the inner wall surface of the connecting cavity 60 and the outer wall surface of the outflow channel 64, and simultaneously disposed between the inflow channel 63 and the outflow channel 65, for sealing the connecting cavity 60 and the outflow channel 65. Before the first sealing device 66 fails, the cooling medium will not flow into the outflow channel 65. When the first sealing device 66 fails, the outflow channel 65 will connect the connecting cavity 60 and the alarm device 7 together, thereby triggering the alarm device 7 to remind the user that the first sealing device 66 has failed and the sealing effect of the connecting cavity 60 has decreased, requiring the cooling assembly 6 to be replaced. Meanwhile, the cooling assembly 6 also includes a second sealing device 67, which is the same as the first sealing device 66, and is located between the inner wall of the connecting cavity 60 and the outer wall of the outflow channel 64. However, the second sealing device 67 is located between the end cover 61 and the drain channel 65. When the first sealing device 66 fails, the second sealing device 67 can ensure that the cooling medium in the connecting cavity 60 flows out of the connecting part 62, effectively preventing oil and water mixing, thereby improving the service life of the reducer.

[0051] Furthermore, the cooling assembly 6 also includes a cooler 68 disposed within the housing 1, one end of the cooler 68 being connected to the inlet 11 and the other end of the cooler 68 being connected to the inlet channel 63; the cooler 68 is capable of cooling the lubricating oil in the reducer.

[0052] In this embodiment, the cooling assembly 6 also includes a cooler 68 disposed inside the housing 1. The cooler 68 is connected to the inlet 11 and the inflow channel 63. At this time, the inflow channel 63 will no longer be directly connected to the inlet 11. The cooler 68 can cool the lubricating oil in the reducer, thereby improving the cooling effect of the cooling assembly 6.

[0053] Furthermore, such as Figure 5 and Figure 6 As shown, the cooling assembly 6 also includes an upper cover assembly 8, which is disposed on the housing 1. The upper cover assembly 8 includes a first cavity 82, which is connected to the connecting cavity 60 and the inlet 11.

[0054] In this embodiment, such as Figure 6 and Figure 7As shown, the cooling assembly 6 also includes a top cover assembly 8, which includes a first cavity 82. The first cavity 82 is connected to the connecting cavity 60 and the inlet 11. In this case, the inflow channel 63 will no longer be directly connected to the inlet 11. Because the top cover assembly 8 is mounted on the housing 1, the entire cooling assembly 6 can be more easily disassembled and replaced. At the same time, an observation hole can be provided on the top cover assembly 8 to facilitate the observation of the operation of the internal gears. The observation hole needs to be covered with a flange to prevent dust and falling rocks from affecting the gears inside the reducer.

[0055] Furthermore, the upper cover assembly 8 also includes a second cavity 84, an alarm device 7 is disposed in the second cavity 84, and a discharge channel 65 is connected to the second cavity 84 and the connecting cavity 60.

[0056] In this embodiment, the upper cover assembly 8 also includes a second cavity 84, within which an alarm device 7 is installed. A drain channel 65 connects the second cavity 84 and the connecting cavity 60. When cooling medium flows into the second cavity 84 from the drain channel 65, the alarm device 7 is triggered, thus alerting the user to a problem of poor sealing. This allows for timely replacement of the connecting cavity 60.

[0057] Furthermore, the second cavity 84 can be made transparent and placed in a position that is convenient for the user to observe. When the cooling medium flows into the second cavity 84, the alarm device 7 does not need to be set up, and the user can judge the sealing effect of the first sealing device 66 by direct observation.

[0058] Furthermore, the connecting gear set 3 includes: a first gear set 30, meshing with the bevel gear set 2; a second gear set 32, meshing with the first gear set 30; a third gear set 34, meshing with the second gear set 32; a fourth gear set 36, meshing with the second gear set 32; a first planetary gear train 4, meshing with the third gear set 34; and a second planetary gear train 5, meshing with the fourth gear set 36.

[0059] In this embodiment, the connecting gear set 3 includes: a first gear set 30, which includes gears meshing with the bevel gear set 2, and also coaxially arranged spur gears; a second gear set 32, which includes gears meshing with the spur gears in the first gear set 30, and also includes spur gears of the same module arranged on both sides; a third gear set 34, located on one side of the second gear set 32, whose external gears can mesh with some of the spur gears in the second gear set 32; and a fourth gear set 36, located on the other side of the second gear set 32, whose external gears can mesh with some of the spur gears in the second gear set 32. The first planetary gear train 4 meshes with the internal gears of the third gear set 34, and the second planetary gear train 5 meshes with the internal gears of the fourth gear set 36. The power of the bevel gear set 2 is transmitted to the first planetary gear train 4 and the second planetary gear train 5 through the connecting gear set 3, thereby realizing power transmission. Furthermore, by placing the bevel gears at the location of the greatest power source, the strength of the reducer can be effectively improved.

[0060] Furthermore, the connecting gear set 3 also includes: a first fixed bearing 31, disposed at both ends of the first gear set 30, for fixing the first gear set 30 to the housing 1; a second fixed bearing 33, disposed at both ends of the second gear set 32, for fixing the second gear set 32 ​​to the housing 1; a third fixed bearing 35, disposed at both ends of the third gear set 34, for fixing the third gear set 34 to the housing 1; and a fourth fixed bearing 37, disposed at both ends of the fourth gear set 36, for fixing the fourth gear set 36 to the housing 1; wherein the first fixed bearing 31 and the second fixed bearing 33 include tapered roller bearings, the third fixed bearing 35 includes self-aligning roller bearings, and the fourth fixed bearing 37 includes cylindrical roller bearings.

[0061] In this embodiment, the connecting gear set 3 further includes: a first fixed bearing 31, disposed at both ends of the first gear set 30, for fixing the first gear set 30 to the housing 1; a second fixed bearing 33, disposed at both ends of the second gear set 32, for fixing the second gear set 32 ​​to the housing 1; a third fixed bearing 35, disposed at both ends of the third gear set 34, for fixing the third gear set 34 to the housing 1; and a fourth fixed bearing 37, disposed at both ends of the fourth gear set 36, for fixing the fourth gear set 36 to the housing 1; wherein the first fixed bearing 31 and the second fixed bearing 33 include tapered roller bearings, which are used to withstand axial loads. The third fixed bearing 35 includes a self-aligning roller bearing. The fourth fixed bearing 37 includes a cylindrical roller bearing, which facilitates installation and reduces axial dimensions.

[0062] Furthermore, the first planetary gear train 4 includes: a first planetary gear 41, a first sun gear 42, and a first planet carrier 43, wherein the first sun gear 42 meshes with the first planetary gear 41 and is also meshed with the connecting gear set 3, and the first planet carrier 43 meshes with the first planetary gear 41; the second planetary gear train 5 includes: a second planetary gear 51, a second sun gear 52, and a second planet carrier 53, wherein the second sun gear 52 meshes with the second planetary gear 51 and is also meshed with the connecting gear set 3, and the second planet carrier 53 meshes with the second planetary gear 51; the first planetary gear train 4 and the second planetary gear train 5 are coaxially arranged.

[0063] In this embodiment, the first planetary gear train 4 includes: a first planetary gear 41, a first sun gear 42, and a first planet carrier 43, wherein the first sun gear 42 meshes with the first planetary gear 41 and is also meshed with the connecting gear set 3, and the first planet carrier 43 meshes with the first planetary gear 41; the second planetary gear train 5 includes: a second planetary gear 51, a second sun gear 52, and a second planet carrier 53, wherein the second sun gear 52 meshes with the second planetary gear 51 and is also meshed with the connecting gear set 3, and the second planet carrier 53 meshes with the second planetary gear 51; the first planetary gear train 4 and the second planetary gear train 5 are coaxially arranged. The completely symmetrical arrangement of the first planetary gear train 4 and the second planetary gear train 5 ensures that a certain space is formed between the first planetary gear train 4 and the second planetary gear train 5 for installing the cooling assembly 6 while the equipment is operating normally, and also allows for cooling of the sun gears of the first planetary gear train 4 and the second planetary gear train 5. Meanwhile, one end of the first sun gear 42 meshes with the first planet gear 41, and the other end of the first sun gear 42 can mesh with the internal gear of the third gear set 34, thereby realizing the transmission of power from the third gear set 34 to the first sun gear 42.

[0064] A second aspect of the present invention provides a transmission mechanism, including: a reducer according to any one of the first aspect of the technical solutions described above.

[0065] A third aspect of the present invention provides an engineering machine, comprising: a reducer according to any one of the first aspect embodiments described above; and / or a transmission mechanism according to any one of the second aspects described above.

[0066] Construction machinery can include: coal mining machines, heavy trucks, trailers, excavators, roadheaders, bulldozers, road rollers, and concrete pump trucks, or mechanical equipment such as tower cranes, construction hoists, and material hoists.

[0067] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A speed reducer for use in engineering machinery, characterized in that, The speed reducer includes: A housing, the housing including an inlet and at least two outlets; A bevel gear set is disposed inside the housing for connection to an external power source; A connecting gear set is disposed within the housing and meshes with the bevel gear set; A first planetary gear train is disposed within the housing and meshes with the connecting gear set. The first planetary gear train includes a first central shaft and a first through hole is provided on the axis along the first central shaft. The second planetary gear train is disposed within the housing and meshes with the connecting gear set. The second planetary gear train includes a second central shaft and a second through hole is provided on the axis of the second central shaft. The first planetary gear train and the second planetary gear train are coaxially arranged, wherein the first planetary gear train and the second planetary gear train are separately arranged. A cooling assembly includes a connecting cavity, an inflow channel, and at least two outflow channels. The connecting cavity is located between the first planetary gear train and the second planetary gear train. The inflow channels communicate with the inlet and the connecting cavity. The outflow channel is connected to the connecting cavity and the outflow outlet, and the outflow channel passes through the first through hole or the second through hole; The cooling assembly also includes: At least one drainage channel, the drainage channel being in communication with the outside of the connecting cavity and the housing; At least two end caps are respectively disposed on both sides of the connecting cavity; A connecting portion is disposed within the housing and together with at least two end caps forms the connecting cavity; A first sealing device is disposed between the inner wall surface of the connecting cavity and the outer wall surface of the outflow channel, and also between the inflow channel and the discharge channel, for sealing the connecting cavity and the discharge channel; The second sealing device is disposed between the inner wall surface of the connecting cavity and the outer wall surface of the outflow channel, and also between the end cap and the discharge channel, for sealing the end cap and the connecting part.

2. The reducer according to claim 1, characterized in that, Also includes: An alarm device, which is mounted on the housing, is used to send alert information; The discharge channel is connected to the connecting cavity and the alarm device.

3. The reducer according to claim 1, characterized in that, The cooling assembly further includes a cooler, one end of which is connected to the inlet and the other end of which is connected to the inflow channel.

4. The reducer according to claim 2, characterized in that, The cooling assembly further includes: an upper cover assembly disposed on the housing, the upper cover assembly including a first cavity communicating with the connecting cavity and the inlet.

5. The reducer according to claim 4, characterized in that, The top cover assembly also includes a second cavity, the alarm device is disposed in the second cavity, and the discharge channel communicates with the second cavity and the connecting cavity.

6. The reducer according to any one of claims 1 to 5, characterized in that, The connecting gear set includes: a first gear set, which meshes with the bevel gear set; The second gear set meshes with the first gear set; The third gear set meshes with the second gear set; The fourth gear set meshes with the second gear set; The first planetary gear train meshes with the third gear set; The second planetary gear train meshes with the fourth gear set.

7. The reducer according to claim 6, characterized in that, The connecting gear set also includes: The first fixed bearing is disposed at both ends of the first gear set and is used to fix the first gear set to the housing; The second fixed bearing is disposed at both ends of the second gear set and is used to fix the second gear set to the housing; The third fixed bearing is disposed at both ends of the third gear set and is used to fix the third gear set to the housing; A fourth fixed bearing is disposed at both ends of the fourth gear set and is used to fix the fourth gear set to the housing; The first and second fixed bearings include tapered roller bearings, the third fixed bearing includes self-aligning roller bearings, and the fourth fixed bearing includes cylindrical roller bearings.

8. The reducer according to any one of claims 1 to 5, characterized in that, The first planetary gear train includes: a first planetary gear, a first sun gear, and a first planet carrier, wherein the first sun gear meshes with the first planetary gear, and the first sun gear meshes with the connecting gear set, and the first planet carrier meshes with the first planetary gear; The second planetary gear train includes: a second planetary gear, a second sun gear, and a second planetary carrier, wherein the second sun gear meshes with the second planetary gear, and the second sun gear meshes with the connecting gear set, and the second planetary carrier meshes with the second planetary gear.

9. A transmission mechanism, characterized in that, Includes the speed reducer as described in any one of claims 1 to 8.

10. An engineering machinery, characterized in that, include: The reducer as described in any one of claims 1 to 8; or The transmission mechanism as described in claim 9.

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