Bearing structure adapting to speed reducer input shaft after torque increase
By setting a combined structure of cylindrical roller bearing and deep groove ball bearing at the upper and lower ends of the reducer input shaft, the problem of the rear bearing bearing is solved by greatly increasing the motor output torque, effectively bearing the radial and axial forces is achieved, and the stability of oil supply for the bearing is ensured.
Patent Information
- Application Number
- CN202420010561.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-03
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-01-03
AI Technical Summary
After the motor output torque has increased significantly, the prior art is difficult to meet the requirements of the radial and axial stresses of the reducer input shaft for both bearings.
Cylindrical roller bearings are respectively provided at the upper and lower ends of the reducer input shaft, and at least one of the ends is provided with a deep groove ball bearing, through this combined structure, the radial and axial forces are to be withstand.
It is realized that after the motor output torque is greatly increased, it not only meets the requirements of radial stress on the input shaft of the reducer, but also meets the requirements of axial stress on the bearings, and ensures oil supply guarantees for each bearing.
Smart Images
Figure CN222811185U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a bearing structure of a speed reducer input shaft adapted to torque increase, belonging to the technical field of engineering machinery speed reduction. Background Art
[0002] With the advancement of technology, the electric drive system of construction machinery is constantly developing towards high speed and high torque.
[0003] In the electric drive system, the gear teeth of the driving wheel of the input shaft of the reducer and the driven wheel teeth of the intermediate shaft are both helical gears, so the meshing can improve the transmission efficiency and transmission stability. However, when this helical gear is used for transmission, it will not only form radial force on the input shaft, but also form axial force, causing the input shaft to move. When the motor output speed increases and the torque increases, the radial force and axial force on the input shaft of the reducer will increase synchronously, and these two forces will be transmitted to the bearings at both ends of the input shaft, and the bearings will bear the forces in these two directions.
[0004] To solve the above problems, the traditional approach is to use deep groove ball bearings at the upper and lower ends of the input shaft. Since the inner and outer sleeves of such bearings have deep grooves, the balls in the grooves can not only withstand radial forces due to the restrictions of the groove bottom, but also withstand axial forces due to the restrictions of the side walls on both sides of the groove. However, due to the limited force area of the groove bottom of the deep groove ball bearing, the radial bearing force is also limited. As the output torque of the motor increases further, the traditional approach of using deep groove ball bearings at both ends of the input shaft cannot solve the radial force requirements of the bearings after the motor output torque increases significantly. Utility Model Content
[0005] The technical problem to be solved by the utility model is: how to meet the requirements of the radial force and axial force of the reducer input shaft on the bearings at both ends after the motor output torque increases significantly.
[0006] In view of the above problems, the technical solution proposed by the utility model is:
[0007] A bearing structure for a reducer input shaft adapted to torque increase, wherein cylindrical roller bearings are respectively arranged at the upper end and the lower end of the input shaft, and a deep groove ball bearing is arranged at at least one end.
[0008] Furthermore, a double bearing chamber is provided on the housing of the reducer at the upper end of the input shaft, in which a cylindrical roller bearing and a deep groove ball bearing mounted on the input shaft are provided; a single bearing chamber is provided on the housing of the reducer at the lower end of the input shaft, in which a cylindrical roller bearing mounted on the input shaft is provided.
[0009] Furthermore, the cylindrical roller bearing is located above the deep groove ball bearing.
[0010] Furthermore, an electronic oil pump oil inlet pipeline is provided above the dual bearing chamber.
[0011] Furthermore, a double bearing chamber is provided on the housing of the reducer at the lower end of the input shaft, in which a cylindrical roller bearing and a deep groove ball bearing mounted on the input shaft are provided; a single bearing chamber is provided on the housing of the reducer at the upper end of the input shaft, in which a cylindrical roller bearing mounted on the input shaft is provided.
[0012] Furthermore, an oil inlet hole of an electronic oil pump is provided in the input shaft, and an oil outlet hole for supplying oil to the cylindrical roller bearing and the deep groove ball bearing is provided at the location where the cylindrical roller bearing and the deep groove ball bearing are provided. Beneficial Effects
[0013] 1. It can meet the requirements of both radial force and axial force on the input shaft of the reducer after the motor output torque increases significantly;
[0014] 2. Each bearing has oil supply guarantee;
[0015] 3. The number of cylindrical roller bearings and deep groove ball bearings is reasonably matched and the setting is simple. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a cross-sectional schematic diagram of an electric drive system including a motor and a reducer in Embodiment 1;
[0017] Figure 2 for Figure 1 A partial schematic diagram of
[0018] Figure 3 It is a partial cross-sectional schematic diagram of the electric drive system in the area where the input shaft is located in the second embodiment.
[0019] In the figure: 1. reducer; 2. motor; 3. housing; 4. input shaft; 5. cylindrical roller bearing; 6. deep groove ball bearing; 7. double bearing chamber; 8. single bearing chamber; 9. electronic oil pump oil inlet pipeline; 10. electronic oil pump oil inlet pipe hole; 101. oil outlet hole. DETAILED DESCRIPTION
[0020] The utility model is further described below in conjunction with the accompanying drawings: Embodiment 1
[0021] like Figure 1 , 2As shown, a bearing structure of the input shaft 4 of the reducer 1 adapted to the increase of torque, wherein cylindrical roller bearings 5 are respectively provided at the upper and lower ends of the input shaft 4, and a deep groove ball bearing 6 is provided at at least one end. The cylindrical roller bearing 5 provided at the upper end of the input shaft 4 and the cylindrical roller bearing 5 provided at the lower end of the input shaft 4 are used to balance the radial force transmitted by the input shaft, and the deep groove ball bearing 6 provided at the upper and / or lower ends of the input shaft 4 is used to bear the axial force transmitted by the input shaft 4. In this way, the radial force requirements of the input shaft 4 of the reducer 1 can be met after the output torque of the motor 2 is greatly increased, and the axial force requirements of the input shaft 4 can be met.
[0022] Preferably, a double bearing chamber 7 is provided on the housing 3 of the reducer at the upper end of the input shaft 4, and a cylindrical roller bearing 5 and a deep groove ball bearing 6 are provided in the double bearing chamber 7; a single bearing chamber 8 is provided on the housing 3 of the reducer at the lower end of the input shaft 4, and a cylindrical roller bearing 5 mounted on the input shaft 4 is provided in the single bearing chamber 8.
[0023] Furthermore, the cylindrical roller bearing 5 is located above the deep groove ball bearing 6 .
[0024] Furthermore, an electronic oil pump oil inlet pipeline 9 is provided above the dual bearing chamber 7, which is used to pump oil to the cylindrical roller bearing 5 and the deep groove ball bearing 6 in the dual bearing chamber 7, so as to avoid the situation where one bearing in the dual bearing chamber blocks the oil supply to the other bearing and causes insufficient oil supply to the other bearing when using the traditional splash oil lubrication method. Embodiment 2
[0025] like Figure 3 As shown, the difference from the first embodiment is that: a double bearing chamber 7 is provided on the housing 3 of the reducer at the lower end of the input shaft 4, and a cylindrical roller bearing 5 and a deep groove ball bearing 6 are provided in the double bearing chamber 7 and are sleeved on the input shaft 4; a single bearing chamber 8 is provided on the housing 3 of the reducer at the upper end of the input shaft 4, and a cylindrical roller bearing 5 sleeved on the input shaft 4 is provided in the single bearing chamber 8. An electronic oil pump oil inlet pipe hole 10 is provided in the input shaft 4, and an oil outlet hole 101 for supplying oil to the cylindrical roller bearing 5 and the deep groove ball bearing 6 is provided at the location where the cylindrical roller bearing 5 and the deep groove ball bearing 6 are provided, so that each bearing can obtain the pump-pressure lubricating oil delivered by the electronic oil pump when in use.
[0026] The above embodiments are only used to more clearly describe the present invention and cannot be regarded as limiting the protection scope of the present invention. Any modifications in equivalent forms should be regarded as falling within the protection scope of the present invention.
Claims
1. A bearing structure for a reducer input shaft adapted to torque increase, characterized in that: A cylindrical roller bearing (5) is provided at the upper end and the lower end of the input shaft (4), respectively, and a deep groove ball bearing (6) is provided at at least one end; a double bearing chamber (7) is provided on the housing (3) of the reducer at the upper end of the input shaft (4), and a cylindrical roller bearing (5) sleeved on the input shaft (4) and a deep groove ball bearing (6) are provided in the double bearing chamber (7); a single bearing chamber (8) is provided on the housing (3) of the reducer at the lower end of the input shaft (4), and a cylindrical roller bearing (5) sleeved on the input shaft (4) is provided in the single bearing chamber (8).
2. The bearing structure of the reducer input shaft adapted to torque increase according to claim 1, characterized in that: The cylindrical roller bearing (5) is located above the deep groove ball bearing (6).
3. The bearing structure of the input shaft of the speed reducer adapted to torque increase according to claim 2, characterized in that: An electronic oil pump oil inlet pipeline (9) is provided above the dual bearing chamber (7).
4. The bearing structure of the reducer input shaft adapted to torque increase according to claim 1, characterized in that: A double bearing chamber (7) is provided on the housing (3) of the reducer at the lower end of the input shaft (4), and a cylindrical roller bearing (5) sleeved on the input shaft (4) and a deep groove ball bearing (6) are provided in the double bearing chamber (7); a single bearing chamber (8) is provided on the housing (3) of the reducer at the upper end of the input shaft (4), and a cylindrical roller bearing (5) sleeved on the input shaft (4) is provided in the single bearing chamber (8).
5. The bearing structure of the reducer input shaft adapted to torque increase according to claim 4, characterized in that: An electronic oil pump oil inlet pipe hole (10) is provided in the input shaft (4), and an oil outlet hole (101) for supplying oil to the cylindrical roller bearing (5) and the deep groove ball bearing (6) is provided at the location where the cylindrical roller bearing (5) and the deep groove ball bearing (6) are provided.