Gear box body structure with cooling function

Abstract

The utility model discloses a gear box body structure with a cooling function. The gear box body structure comprises a box body, a box cover, a first rotating shaft, a second rotating shaft, a first gear, a second gear and a bearing assembly. The box body is connected to the opening of the box cover, and lubricating oil is arranged in the box body; the first rotating shaft is sleeved with the first gear, and the second rotating shaft is sleeved with the second gear; the first gear is meshed with the second gear; the first gear shaft and the second gear shaft are both sleeved with bearing assemblies. One end of the oil guide groove is communicated with lubricating oil, and the other end of the oil guide groove is communicated with the bearing assembly. The technical problem that in the prior art, a bevel gear speed reducer is insufficient in bearing area heat dissipation under the heavy-load or continuous operation working condition is solved, the lubricating oil flowing path is optimized by additionally arranging the oil inlet channel, the bearing area cooling effect can be improved in a targeted mode, the failure risk caused by overheat of a bearing of a heavy-load speed reducer is reduced, and the service life is prolonged. And a basic technical guarantee is provided for long-acting operation under a high-load working condition.

Description

Technical Field

[0001] This application relates to the field of gearbox lubrication technology, and in particular to a gearbox structure with cooling function. Background Technology

[0002] The three-stage bevel gear reducer with hardened tooth surfaces is a common type of reducer, widely used in heavy machinery in industries such as mining, metallurgy, cement, chemicals, and building materials. Under heavy load or continuous operation, the bearing area is prone to excessive temperature rise due to frictional heat accumulation; the typical oil bath temperature is 70–85℃.

[0003] Currently, gearboxes mainly rely on natural heat dissipation or external cooling systems, such as fans and oil cooling devices. This not only increases the complexity and energy consumption of the equipment but also requires significant modifications to the gearbox structure. Adding fans and oil cooling devices is particularly challenging in compact gearboxes, and insufficient heat dissipation can easily lead to bearing lubrication failure, shortened lifespan, and decreased equipment reliability, becoming a bottleneck restricting the long-term operation of heavy-duty equipment. Utility Model Content

[0004] This application provides a gearbox structure with cooling function, which solves the technical problem of insufficient heat dissipation in the bearing area of ​​the bevel gear reducer under heavy load or continuous operation conditions in the prior art.

[0005] This utility model embodiment provides a gearbox structure with cooling function, including a gearbox body, a gearbox cover, a first rotating shaft, a second rotating shaft, a first gear, a second gear, and a bearing assembly; the gearbox body is connected to the opening of the gearbox cover, and lubricating oil is disposed in the gearbox body; the first gear is sleeved on the first rotating shaft, and the second gear is sleeved on the second rotating shaft; the first gear and the second gear mesh; the bearing assembly is sleeved on both the first gear shaft and the second gear shaft; an oil guide groove is formed on the gearbox body, one end of the oil guide groove is connected to the lubricating oil, and the other end of the oil guide groove is connected to the bearing assembly.

[0006] In one possible implementation, the housing is further provided with an oil return hole; the lubricating oil enters the housing through the oil return hole.

[0007] In one possible implementation, the bearing assembly includes a first bearing, a second bearing, a third bearing, and a fourth bearing; the first bearing and the second bearing are sequentially sleeved on the first gear shaft along a direction close to the first gear; the third bearing and the fourth bearing are sleeved on the second bearing, and the third bearing and the fourth bearing are respectively disposed at both ends of the second gear; the first bearing, the third bearing, and the fourth bearing are all in communication with the oil guide groove.

[0008] In one possible implementation, a bearing housing is also included; the bearing housing is fitted onto the outside of the first bearing, and the bearing housing has an oil inlet channel in the radial direction, through which the lubricating oil enters the first bearing for lubrication and cooling.

[0009] In one possible implementation, the oil guide groove includes a collection groove, a first branch, and a second branch; the collection groove is configured to collect the lubricating oil; the first branch and the second branch are respectively provided on both sides of the collection groove; the first branch is connected to the first bearing; and the second branch is connected to the third bearing or the fourth bearing.

[0010] In one possible implementation, the oil return hole is inclined.

[0011] One or more technical solutions provided in this application have at least the following technical effects:

[0012] This utility model embodiment employs a gearbox structure with cooling function, including a gearbox body, a cover, a first rotating shaft, a second rotating shaft, a first gear, a second gear, and bearing assemblies. The gearbox body is connected to the opening of the cover, and lubricating oil is provided inside the gearbox body. The first gear is sleeved on the first rotating shaft, and the second gear is sleeved on the second rotating shaft; the first gear and the second gear mesh. Bearing assemblies are sleeved on both the first gear shaft and the second gear shaft. An oil guide groove is provided on the gearbox body, with one end of the oil guide groove communicating with the lubricating oil and the other end communicating with the bearing assembly. This application utilizes the centrifugal force of gear rotation to collect splashed oil, and directionally transports it to key heat source areas such as the first bearing, the third bearing, and the fourth bearing through the branch of the oil guide groove. Furthermore, this application also adds a radial oil inlet channel for the bearing housing, thereby improving the lubrication coverage and cooling efficiency of the high-temperature bearings. This application also provides an inclined oil return hole to accelerate the return of oil to the oil pool, thereby forming a closed heat exchange cycle. This application does not require additional cooling devices; heat dissipation is enhanced only through local structural optimization of the gearbox body, improving reliability and increasing cost by zero. This application solves the technical problem of insufficient heat dissipation in the bearing area of ​​bevel gear reducers under heavy load or continuous operation conditions in the prior art. By adding an oil inlet channel and optimizing the flow path of lubricating oil, the cooling effect of the bearing area can be improved in a targeted manner, reducing the risk of failure caused by overheating of the bearings in heavy-duty reducers, and providing a basic technical guarantee for long-term operation under high load conditions. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of a gearbox structure with cooling function provided in an embodiment of this application;

[0015] Figure 2 A schematic diagram of a gearbox structure with cooling function provided in an embodiment of this application;

[0016] Figure 3 for Figure 1 RR section view.

[0017] Icons: 1-Box body; 11-Oil guide groove; 111-Collection groove; 112-First branch; 113-Second branch; 12-Oil return hole; 2-Box cover; 3-First shaft; 4-Second shaft; 5-First gear; 6-Second gear; 7-Bearing assembly; 71-First bearing; 72-Second bearing; 73-Third bearing; 74-Fourth bearing; 8-Bearing box; 81-Oil inlet channel. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0019] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0020] This utility model embodiment provides a gearbox structure with cooling function, such as Figure 1-3As shown, it includes a housing 1, a cover 2, a first rotating shaft 3, a second rotating shaft 4, a first gear 5, a second gear 6, and a bearing assembly 7. The housing 1 is connected to the opening of the cover 2, and lubricating oil is provided in the housing 1. The first gear 5 is sleeved on the first rotating shaft 3, and the second gear 6 is sleeved on the second rotating shaft 4. The first gear 5 and the second gear 6 mesh. Bearing assemblies 7 are sleeved on both the shafts of the first gear 5 and the second gear 6. An oil guide groove 11 is provided on the housing 1, one end of the oil guide groove 11 is connected to the lubricating oil, and the other end of the oil guide groove 11 is connected to the bearing assembly 7.

[0021] In the embodiments of this application, such as Figure 1-3 As shown, the housing 1 is also provided with an oil return hole 12; lubricating oil enters the housing 1 through the oil return hole 12.

[0022] For example, both the first gear 5 and the second gear 6 are bevel gears.

[0023] For example, the first rotating shaft 3, the second rotating shaft 4, the first gear 5, and the second gear 6 are all disposed between the housing 1 and the housing cover 2. The housing 1 is filled with a certain height of lubricating oil. When the motor is started, the motor can drive the input shaft to rotate, that is, the first rotating shaft 3 rotates. The first gear 5 and the second gear 6 mesh, thereby driving the second rotating shaft 4 to rotate. During this process, the centrifugal force of the gear rotation and the lubricating oil generate a hydrodynamic pressure effect, thus generating some splashed lubricating oil. This application provides an oil guide groove 11 on the housing 1. The oil guide groove 11 can collect the splashed lubricating oil and guide the splashed lubricating oil to the bearing chamber and flow to the bearing area. After the lubricating oil in the bearing chamber lubricates and cools the bearing area, it can also flow back to the oil tank, thereby carrying away the heat generated by the rotation of the bearing. Finally, the lubricating oil flows into the lubricating oil area of ​​the housing 1 from the oil return hole 12.

[0024] In the embodiments of this application, such as Figure 1-3 As shown, the bearing assembly 7 includes a first bearing 71, a second bearing 72, a third bearing 73, and a fourth bearing 74; the first bearing 71 and the second bearing 72 are sequentially sleeved on the shaft of the first gear 5 along the direction close to the first gear 5; the third bearing 73 and the fourth bearing 74 are sleeved on the second bearing 72, and the third bearing 73 and the fourth bearing 74 are respectively disposed at both ends of the second gear 6; the first bearing 71, the third bearing 73, and the fourth bearing 74 are all connected to the oil guide groove 11.

[0025] For example, by driving the lubricating oil to flow actively to the bearing position, the flow carries away the heat generated by the bearing rotation, thereby achieving the effect of forced cooling, and the bearing temperature can be reduced by 5 to 10°C.

[0026] For example, increased lubrication coverage extends bearing life and significantly improves gearbox reliability.

[0027] In the embodiments of this application, such as Figure 1-3 As shown, it also includes a bearing housing 8; the bearing housing 8 is sleeved on the outside of the first bearing 71, and the bearing housing 8 has an oil inlet channel 81 in the radial direction, through which lubricating oil enters the first bearing 71 for lubrication and cooling.

[0028] In the embodiments of this application, such as Figure 1-3 As shown, the oil guide groove 11 includes a collection groove 111, a first branch 112 and a second branch 113; the collection groove 111 is configured to collect lubricating oil; the first branch 112 and the second branch 113 are respectively provided on both sides of the collection groove 111; the first branch 112 is connected to the first bearing 71; the second branch 113 is connected to the third bearing 73 or the fourth bearing 74.

[0029] In the embodiments of this application, such as Figure 1-3 As shown, the oil return hole 12 is set at an angle.

[0030] For example, this application can significantly improve the bearing temperature rise phenomenon without adding additional devices such as fans and oil cooling systems; and it does not require expanding the housing 1. The cooling structure of this application is simple and has higher reliability. Specifically, this application only makes local modifications to the housing 1 of the bevel gear reducer, adding a lubricating oil guide groove and an oil return hole 12 structure. This allows for the rational utilization of the moment of inertia to optimize the lubrication path. The guide groove or the inclined oil return hole 12 guides the oil to cover the bearing in a specific direction, thereby significantly improving the heat dissipation performance of the gearbox bearing.

[0031] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0032] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A gear case structure having a cooling function, characterized by, It includes a housing (1), a housing cover (2), a first rotating shaft (3), a second rotating shaft (4), a first gear (5), a second gear (6), and a bearing assembly (7); The box body (1) is connected to the opening of the box cover (2), and the box body (1) is provided with lubricating oil; The first gear (5) is sleeved on the first rotating shaft (3), and the second gear (6) is sleeved on the second rotating shaft (4); The first gear (5) and the second gear (6) mesh; The bearing assembly (7) is sleeved on both the first gear (5) shaft and the second gear (6) shaft; An oil guide groove (11) is provided on the housing (1). One end of the oil guide groove (11) is connected to the lubricating oil, and the other end of the oil guide groove (11) is connected to the bearing assembly (7).

2. The gear case structure having a cooling function according to claim 1, characterized by, The housing (1) is also provided with an oil return hole (12); The lubricating oil enters the housing (1) through the oil return hole (12).

3. The gear case structure having a cooling function according to claim 1, characterized by, The bearing assembly (7) includes a first bearing (71), a second bearing (72), a third bearing (73), and a fourth bearing (74); The first bearing (71) and the second bearing (72) are sequentially sleeved on the shaft of the first gear (5) in a direction close to the first gear (5); The third bearing (73) and the fourth bearing (74) are sleeved on the second bearing (72), and the third bearing (73) and the fourth bearing (74) are respectively disposed at both ends of the second gear (6); The first bearing (71), the third bearing (73) and the fourth bearing (74) are all connected to the oil guide groove (11).

4. The gear case structure having a cooling function according to claim 3, characterized by, It also includes the bearing housing (8); The bearing housing (8) is fitted onto the outside of the first bearing (71), and the bearing housing (8) has an oil inlet channel (81) in the radial direction. The lubricating oil enters the first bearing (71) through the oil inlet channel (81) for lubrication and cooling.

5. The gear case structure having a cooling function according to claim 3, characterized by, The oil guide groove (11) includes a collection groove (111), a first branch (112), and a second branch (113); The collection tank (111) is configured to collect the lubricating oil; The first branch (112) and the second branch (113) are respectively provided on both sides of the collection trough (111); The first branch (112) is connected to the first bearing (71); The second branch (113) is connected to the third bearing (73) or the fourth bearing (74).

6. The gearbox structure with cooling function according to claim 2, characterized in that, The oil return hole (12) is set at an angle.

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