Gearbox

Abstract

The utility model belongs to the technical field of transmission equipment, and discloses a gearbox which comprises a shell, a variable transmission mechanism and an oil collecting shell, a driving motor is arranged on the outer side of the gearbox, a machine shell of the driving motor is fixed on the shell, a connecting hole is formed in the shell, a bearing is arranged in the connecting hole, and the oil collecting shell is arranged in the bearing. A motor shaft of the driving motor penetrates through the connecting hole to be connected with the variable-speed transmission mechanism, the motor shaft is rotationally connected to the connecting hole through a bearing, the oil collecting shell is fixed to the inner side of the shell, an oil collecting groove is formed in the oil collecting shell and located below the connecting hole, lubricating oil is contained in the oil collecting groove, and a part of the bearing is immersed in the lubricating oil. According to the gearbox, the bearing of the motor shaft is lubricated in an oil immersion mode, effective lubrication of the bearing portion is guaranteed, and the service life of the bearing and the service life of the whole transmission mechanism are greatly prolonged.

Description

Technical Field

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

[0002] In a common new energy gearbox, a driving motor is connected to multi-stage transmission gears in the gearbox. The motor shaft of the driving motor rotates, and power is transmitted to the output shaft through the input shaft and the intermediate shaft in sequence.

[0003] In the prior art, the lubrication method of the bearing at the rotating pair of the motor shaft of the driving motor is generally splash lubrication. The amount of bearing lubricating oil is random and uncontrollable. The splash lubricating oil is far from reaching the level of forming a liquid level, so that the lubricating oil cannot immerse the bearing balls. The lubricating oil splashing to the bearing at the motor shaft is less, and the bearing at this place is often ablated and damaged due to lack of oil and dry friction. And after a long-term parking, there is no oil lubrication for the bearing at the motor shaft. At this time, if it is suddenly started at a high speed, the bearing is damaged due to dry grinding and ablation, affecting the reliability and stability of the overall operation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a gearbox, in which the lubrication method of the bearing at the rotating pair of the motor shaft of the driving motor is oil immersion lubrication, which ensures the effective lubrication of the bearing part and greatly improves the service life of the bearing and the entire transmission mechanism.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A gearbox, comprising:

[0007] A housing;

[0008] A speed change transmission mechanism, arranged in the housing. A driving motor is arranged outside the gearbox, and the housing of the driving motor is fixed on the housing. The housing is provided with a connection hole, and the connection hole is provided with a bearing. The motor shaft of the driving motor passes through the connection hole and is connected to the speed change transmission mechanism, and the motor shaft is rotatably connected to the connection hole through the bearing;

[0009] An oil collecting housing, fixed inside the housing. The oil collecting housing is provided with an oil collecting groove, the oil collecting groove is located below the connection hole, there is lubricating oil in the oil collecting groove, and part of the bearing is immersed in the lubricating oil.

[0010] Preferably, the bottom shape of the oil collecting groove is set to be an arc shape flush with the outer edge of the connection hole.

[0011] Preferably, the oil collecting housing is provided with an avoidance groove on the groove wall of the oil collecting groove, and the avoidance groove is used for avoiding the motor shaft.

[0012] Preferably, the oil collecting shell is fixedly connected to the housing through a connecting piece; wherein,

[0013] The oil collecting shell is provided with a through hole, the motor shell is provided with a mounting hole, and the connecting piece passes through the through hole and is fixedly connected with the mounting hole.

[0014] Preferably, the connecting member includes a bolt, the mounting hole is correspondingly configured as a threaded hole, and the bolt passes through the through hole and is threadedly connected to the mounting hole.

[0015] Preferably, a first gasket is provided between the screw head portion of the bolt and the oil collecting shell, and the first gasket is sleeved on the screw rod portion of the bolt.

[0016] Preferably, a second gasket is provided between the oil collecting shell and the housing, and the second gasket is sleeved on the screw portion of the bolt.

[0017] Preferably, the connecting members, the through holes and the mounting holes are provided in a plurality in a one-to-one correspondence.

[0018] Preferably, the speed change transmission mechanism comprises an input shaft, an input gear, a transmission assembly, an output shaft and an output gear; wherein,

[0019] The motor shaft is fixedly connected to the input shaft, the input gear is fixedly arranged on the input shaft, the output gear is fixedly arranged on the output shaft, and the input gear and the output gear are transmission-connected via the transmission assembly.

[0020] Preferably, the transmission assembly includes an intermediate shaft, a first transmission gear and a second transmission gear, the first transmission gear and the second transmission gear are both fixed on the intermediate shaft, the input gear is meshedly connected to the first transmission gear, and the output gear is meshedly connected to the second transmission gear.

[0021] Beneficial effects:

[0022] The gearbox provided by the utility model has an oil collecting shell arranged on the inner side of the shell body, and the oil collecting shell has an oil collecting groove opened below the connecting hole, so that the bearing can be partially immersed in the lubricating oil in the oil collecting groove all the time, that is, the lubrication method of the bearing at the rotating pair of the motor shaft of the driving motor is oil immersion lubrication, the lubrication of the bearing parts is reliable and effective, the operating temperature of the bearing is reduced, and the risk of bearing ablation damage is reduced; in addition, even if the driving motor does not work for a long time, there is still oil in the oil collecting groove to soak the bearing, the bearing will not be damaged due to sudden high-speed starting, and the overall service life of the gearbox is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a simplified structural diagram of the gearbox and the drive motor provided by the utility model;

[0024] Figure 2 It is a partial structural schematic diagram of the gearbox provided by the present utility model;

[0025] Figure 3 It is a schematic diagram of the partial physical structure of the gearbox provided by the present utility model.

[0026] In the figure:

[0027] 1. Housing; 11. Connecting hole; 12. Bearing; 13. Mounting hole;

[0028] 2. Speed change transmission mechanism; 21. Input shaft; 22. Input gear; 23. Intermediate shaft; 24. First transmission gear; 25. Second transmission gear; 26. Output shaft; 27. Output gear;

[0029] 3. Oil collecting housing; 31. Oil collecting groove; 32. Avoidance groove; 33. Perforation;

[0030] 4. Driving motor; 41. Motor housing; 42. Motor shaft;

[0031] 5. Connecting piece;

[0032] 61. First gasket; 62. Second gasket. Specific implementation manners

[0033] The following further elaborates on the present utility model in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely used to explain the present utility model and do not limit the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0034] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] This embodiment provides a gearbox. Referring to Figures 1 to 3 As shown, the gearbox includes a housing 1, a speed-changing transmission mechanism 2 and an oil sump 3. The speed-changing transmission mechanism 2 is arranged inside the housing 1. A driving motor 4 is disposed outside the gearbox. The housing 41 of the driving motor 4 is fixed on the housing 1. The housing 1 is provided with a connection hole 11. A bearing 12 is provided in the connection hole 11. The motor shaft 42 of the driving motor 4 passes through the connection hole 11 and is connected to the speed-changing transmission mechanism 2, and the motor shaft 42 is rotatably connected to the connection hole 11 through the bearing 12. The oil sump 3 is fixed inside the housing 1. The oil sump 3 is provided with an oil sump 31. The oil sump 31 is located below the connection hole 11. There is lubricating oil in the oil sump 31, and part of the bearing 12 is immersed in the lubricating oil.

[0038] In this embodiment, by providing the oil sump 3 on the housing 1 and arranging the oil sump 31 below the connection hole 11 in the oil sump 3, the bearing 12 can always be partially immersed in the lubricating oil in the oil sump 31. That is, the lubrication method of the bearing 12 at the rotating pair of the motor shaft 42 of the driving motor 4 is oil immersion lubrication. The lubrication of the bearing 12 part is reliable and effective, reducing the working temperature of the bearing 12 and reducing the risk of ablation and damage of the bearing 12. In addition, even if the driving motor 4 does not work for a long time, there is still oil in the oil sump 31 soaking the bearing 12, and the bearing 12 will not be damaged due to sudden high-speed start, greatly improving the overall service life of the gearbox.

[0039] In this embodiment, the bottom shape of the oil collecting tank 31 is set to an arc shape flush with the outer edge of the connecting hole 11. Such a setting can, on the one hand, ensure that the oil collecting tank 31 can hold enough lubricating oil, and on the other hand, reduce the sharp corner structure at the bottom of the oil collecting tank 31, reducing the possibility of irregular backflow of the lubricating oil in the oil collecting tank 31 caused by the rotation of the bearing 12. In addition, setting the bottom shape of the oil collecting tank 31 to an arc shape can adapt to the outer edge of the connecting hole 11, and also facilitates installation and positioning, with strong practicability.

[0040] In this embodiment, the oil collecting housing 3 is provided with an avoidance groove 32 on the groove wall of the oil collecting tank 31, and the avoidance groove 32 is used to avoid the motor shaft 42. Specifically, the opening of the avoidance groove 32 allows the motor shaft 42 to pass through from above the oil collecting tank 31, avoiding interference with the motor shaft 42 by the housing part of the oil collecting housing 3, that is, the groove wall of the oil collecting tank 31.

[0041] In this embodiment, the shape of the avoidance groove 32 is set to an arc shape larger than the outer diameter of the motor shaft 42, with a simple structure and convenient processing.

[0042] In this embodiment, the oil collecting housing 3 and the housing 1 are fixedly connected by a connecting member 5. Among them, the oil collecting housing 3 is provided with a through hole 33, and the housing 1 is provided with a mounting hole 13. The connecting member 5 passes through the through hole 33 and is fixedly connected to the mounting hole 13. Such a setting can realize the detachable connection between the oil collecting housing 3 and the housing 1, which is convenient for disassembly and simple to use.

[0043] As an alternative embodiment, the connecting member 5 includes a bolt, and the mounting hole 13 is correspondingly set as a threaded hole. The bolt passes through the through hole 33 and is threadedly connected to the mounting hole 13. In some other alternative embodiments, the connecting member 5 can also be set as a bolt assembly, and the bolt assembly includes a bolt and a nut. In this case, the mounting hole 13 does not need to be set as a threaded hole, and the bolt passes through the through hole 33 and the mounting hole 13 and is threadedly connected to the threaded hole.

[0044] In this embodiment, a first gasket 61 is provided between the bolt head of the bolt and the oil collecting housing 3, and the first gasket 61 is sleeved on the screw rod part of the bolt. The setting of the first gasket 61 can prevent the bolt head from directly making hard contact with the oil collecting housing 3, thereby playing a certain protective role for the oil collecting housing 3. In addition, the setting of the first gasket 61 can also achieve a certain sealing effect.

[0045] Optionally, the material of the first gasket 61 is set to a flexible material with cushioning performance, or it can also be set to a rigid material, which is not limited too much here.

[0046] In this embodiment, a second gasket 62 is further provided between the oil collecting shell 3 and the shell 1, and the second gasket 62 is sleeved on the screw rod portion of the bolt. The setting of the second gasket 62 can avoid hard contact between the oil collecting shell 3 and the shell 1, thereby playing a certain protective role for both the oil collecting shell 3 and the shell 1. In addition, the setting of the second gasket 62 can also achieve a certain sealing effect.

[0047] Optionally, the material of the second gasket 62 is set as a flexible material with buffering performance, or it can also be set as a rigid material, which is not overly limited here.

[0048] Optionally, the number of the connecting members 5, the through holes 33 and the mounting holes 13 are correspondingly provided with multiple ones. In this embodiment, the number of the connecting members 5, the through holes 33 and the mounting holes 13 are correspondingly provided with three. With such a setting, the connection of the oil collecting shell 3 is further ensured to be reliable and stable.

[0049] In this embodiment, the speed change transmission mechanism 2 includes an input shaft 21, an input gear 22, a transmission component, an output shaft 26 and an output gear 27. Among them, the motor shaft 42 is fixedly connected to the input shaft 21, the input gear 22 is fixedly arranged on the input shaft 21, the output gear 27 is fixedly arranged on the output shaft 26, and the input gear 22 is in transmission connection with the output gear 27 through the transmission component. Specifically, when the motor shaft 42 of the driving motor 4 rotates, it can drive the input shaft 21 to rotate, and the power is sequentially transmitted to the output shaft 26 through the input gear 22, the transmission component and the output gear 27.

[0050] Optionally, the motor shaft 42 and the output shaft 26 can be fixedly connected through a spline (not shown).

[0051] In this embodiment, the transmission component includes an intermediate shaft 23, a first transmission gear 24 and a second transmission gear 25. The first transmission gear 24 and the second transmission gear 25 are both fixedly arranged on the intermediate shaft 23. The input gear 22 is meshed and connected with the first transmission gear 24, and the output gear 27 is meshed and connected with the second transmission gear 25. Specifically, when the motor shaft 42 of the driving motor 4 rotates, it can drive the input shaft 21 to rotate, and the power is sequentially transmitted to the output shaft 26 through the input gear 22, the first transmission gear 24, the second transmission gear 25 and the output gear 27, realizing power transmission.

[0052] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A gearbox, characterized in that, include: Housing (1); A speed change transmission mechanism (2) is arranged in the housing (1), a drive motor (4) is arranged on the outer side of the gearbox, a housing (41) of the drive motor (4) is fixed on the housing (1), a connecting hole (11) is opened in the housing (1), a bearing (12) is arranged in the connecting hole (11), a motor shaft (42) of the drive motor (4) passes through the connecting hole (11) and is connected to the speed change transmission mechanism (2), and the motor shaft (42) is rotatably connected to the connecting hole (11) through the bearing (12); An oil collecting shell (3) is fixed to the inner side of the housing (1). The oil collecting shell (3) is provided with an oil collecting groove (31). The oil collecting groove (31) is located below the connecting hole (11). Lubricating oil is contained in the oil collecting groove (31), and the bearing (12) is partially immersed in the lubricating oil.

2. The transmission according to claim 1, characterized in that, The bottom shape of the oil collecting groove (31) is arranged to be an arc shape that is arranged flush with the outer edge of the connecting hole (11).

3. The gearbox according to claim 1, characterized in that, The oil collecting shell (3) is provided with an avoidance groove (32) on the groove wall of the oil collecting groove (31), and the avoidance groove (32) is used to avoid the motor shaft (42).

4. The gearbox according to claim 1, characterized in that, The oil collecting shell (3) and the housing (1) are fixedly connected via a connecting piece (5); wherein: The oil collecting shell (3) is provided with a through hole (33), the housing (1) is provided with a mounting hole (13), and the connecting member (5) is passed through the through hole (33) and is fixedly connected to the mounting hole (13).

5. The transmission according to claim 4, characterized in that, The connecting member (5) comprises a bolt, the mounting hole (13) is correspondingly arranged as a threaded hole, and the bolt passes through the through hole (33) and is threadedly connected to the mounting hole (13).

6. The gearbox according to claim 5, characterized in that, A first gasket (61) is arranged between the screw head of the bolt and the oil collecting shell (3), and the first gasket (61) is sleeved on the screw rod of the bolt.

7. The transmission according to claim 5, characterized in that, A second gasket (62) is also provided between the oil collecting shell (3) and the housing (1), and the second gasket (62) is sleeved on the screw portion of the bolt.

8. The transmission according to claim 4, characterized in that, The connecting member (5), the through hole (33) and the mounting hole (13) are arranged in a plurality in a one-to-one correspondence.

9. The transmission according to claim 1, characterized in that The speed change transmission mechanism (2) comprises an input shaft (21), an input gear (22), a transmission assembly, an output shaft (26) and an output gear (27); wherein: The motor shaft (42) is fixedly connected to the input shaft (21), the input gear (22) is fixedly arranged on the input shaft (21), the output gear (27) is fixedly arranged on the output shaft (26), and the input gear (22) and the output gear (27) are transmission-connected via the transmission assembly.

10. The transmission according to claim 9, characterized in that, The transmission assembly comprises an intermediate shaft (23), a first transmission gear (24) and a second transmission gear (25); the first transmission gear (24) and the second transmission gear (25) are both fixedly arranged on the intermediate shaft (23); the input gear (22) is meshingly connected with the first transmission gear (24); and the output gear (27) is meshingly connected with the second transmission gear (25).

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