Low vibration automobile generator rotor shaft support assembly

Abstract

The utility model belongs to the technical field of automobile generator, and disclose low vibration automobile generator rotor shaft support subassembly, aims at solving the problem that the vibration of generator rotor is produced because of the precession deviation in the automobile driving. The component includes rotor shaft, deviation disc, precession resistance shell and anti-precession deviation assembly, deviation disc is fixed coaxially with rotor shaft, precession resistance shell is fixed in the car and sets up deviation disc, anti-precession deviation assembly contains two resistance discs respectively located deviation disc both sides, precession resistance shell forms closed cavity and provides support, resistance disc contacts with deviation disc through ball, and the stable resistance of deviation disc is realized to the elastic force of cooperation high elastic tendon beam. High elastic tendon beam cross tension, allow rotor shaft system to be small precession and form restoring torque, ball contact reduces friction and abrasion, inhibit vibration through "elastic constraint + rolling contact" mechanism, prolong the life of device, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of automotive generator technology, specifically to a low-vibration automotive generator rotor shaft support assembly. Background Technology

[0002] In the continuous development of the automotive industry, the generator, as a core component ensuring the normal operation of the vehicle's electrical system, directly affects the vehicle's power performance and service life. Currently, the casing of automotive generators is usually fixed to the engine compartment or body frame through a rigid connection structure. This means that the generator must undergo complex motion states along with the vehicle body during driving, including linear acceleration, braking, cornering, and multi-dimensional vibrations caused by road bumps. According to the principle of conservation of angular momentum, when a car is in dynamic driving conditions, the rotor inside the generator, which rotates at high speed, will generate an inertial torque relative to the outer casing due to changes in the vehicle's attitude. Under the action of this torque, the rotor will inevitably precess relative to the fixed outer casing—this deviation is not a simple axial movement, but rather exhibits a complex spatial angular deflection trend. This non-axial precession misalignment directly disrupts the fit clearance between the rotor shaft and fixed components such as the housing and bearing seats, leading to irregular friction and compression. Specifically, during precession, the outer circumferential surface of the rotor shaft may come into off-center contact with the inner ring of the bearing or experience abnormal friction with the end cover oil seal, thereby causing periodic mechanical vibration.

[0003] Under long-term operation, this vibration will cause irregular wear of the rotor journal, increase bearing clearance, and even cause rubbing failure between the rotor core and the stator winding. In the existing technology, although precision components such as deep groove ball bearings and tapered roller bearings are used to constrain the movement of the rotor shaft, the traditional rigid support structure is difficult to adapt to the dynamic load caused by precession. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a low-vibration automotive generator rotor shaft support assembly, which solves the problems mentioned in the background art, such as wear and vibration caused by rotor precession due to the movement of the generator with the vehicle.

[0005] To achieve the aforementioned objectives, this utility model provides the following technical solution: a low-vibration automotive generator rotor shaft support assembly, including a rotor shaft, and further comprising: An offset disk is disposed at one end of the rotor shaft away from the rotor and the power source, and the offset disk is coaxially and fixedly connected to the rotor shaft; A precession resistance housing, which is coaxial with the rotor shaft, is fixedly installed inside the vehicle and is sleeved on the outside of the offset disk; An anti-precession offset assembly is disposed inside the precession resistance housing. The anti-precession offset assembly includes a first abutment plate and a second abutment plate, which are respectively disposed on both sides of the offset plate to prevent rotor vibration caused by precession offset.

[0006] Preferably, the precession resistance housing includes a first fixing plate, a second fixing plate, and a central connecting ring. The first fixing plate is disposed on the side of the offset disk away from the rotor, the second fixing plate is disposed on the side of the offset disk adjacent to the rotor, and the central connecting ring is disposed between the first fixing plate and the second fixing plate, with both sides of the central connecting ring fixedly connected to the first fixing plate and the second fixing plate.

[0007] Preferably, the second fixing plate is provided with a bearing, and the second fixing plate is rotatably connected to the rotor shaft through the bearing.

[0008] Preferably, the first abutment is disposed between the offset disk and the first fixed plate, and the side of the first abutment adjacent to the offset disk is provided with an annular first roller cavity, and multiple sets of first balls are disposed in the first roller cavity, and the first balls are in frictional contact with the offset disk.

[0009] Preferably, the second abutment is disposed between the offset disk and the second fixed plate, and the side of the second abutment adjacent to the offset disk is provided with an annular second roller cavity, and multiple sets of second balls are disposed in the second roller cavity, and the second balls are in frictional contact with the offset disk.

[0010] Preferably, both the first abutment plate and the second abutment plate are coaxial with the offset plate, and the center of the first abutment plate and the second abutment plate is provided with a relief hole corresponding to the rotor shaft.

[0011] Preferably, the diameter of the first roller cavity is not equal to the diameter of the second roller cavity.

[0012] Preferably, a plurality of first high-elasticity rib bundles are provided between the second abutment plate and the first fixing plate. The first abutment plate has first high-elasticity rib bundle through holes corresponding to the plurality of first high-elasticity rib bundles. The plurality of first high-elasticity rib bundles pass through the corresponding first high-elasticity rib bundle through holes, and the two ends of the first high-elasticity rib bundles are fixedly connected to the second abutment plate and the first fixing plate, respectively.

[0013] Preferably, a plurality of second high-elasticity rib bundles are provided between the first abutment plate and the second fixing plate. The second abutment plate has second high-elasticity rib bundle through holes corresponding to the plurality of second high-elasticity rib bundles. The plurality of second high-elasticity rib bundles pass through the corresponding second high-elasticity rib bundle through holes, and the two ends of the second high-elasticity rib bundles are respectively fixedly connected to the first abutment plate and the second fixing plate.

[0014] Preferably, the multiple sets of the first high-elasticity tendon bundles are circumferentially symmetrically distributed, the multiple sets of the second high-elasticity tendon bundles are circumferentially symmetrically distributed, and the first high-elasticity tendon bundles and the second high-elasticity tendon bundles are arranged alternately.

[0015] Compared with the prior art, the present invention provides a low-vibration automotive generator rotor shaft support assembly, which has the following advantages: This low-vibration automotive generator rotor shaft support assembly includes a deflection disc, a precession resistance housing, an anti-precession deflection component, and highly elastic ribs. Two abutment discs hold the deflection disc in place, while the elasticity of the highly elastic ribs allows for small-range precession deflection and reset, significantly reducing the amount of precession deflection and thus ensuring stable rotor rotation. This prevents vibration caused by mechanical misalignment due to precession deflection. Furthermore, the highly elastic ribs drive the two abutment discs, allowing for small-amplitude precession deflection of the rotor and rotor shaft, preventing material compression and friction damage. The two abutment discs and the deflection disc transmit force through multiple sets of ball bearings, resulting in a small contact area, low friction, long service life, and strong practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the precession-resisting shell of this utility model; Figure 3 This is a schematic diagram of the first and second abutment plates of this utility model; Figure 4 This is a schematic diagram of the second bearing plate structure of this utility model.

[0017] In the diagram: 1. Rotor shaft; 2. Offset disc; 3. Precession resistance housing; 4. Anti-precession offset assembly; 5. First fixing plate; 6. Second fixing plate; 7. Intermediate connecting ring; 8. Bearing; 9. First abutment disc; 10. Second abutment disc; 11. First roller cavity; 12. First ball; 13. Second roller cavity; 14. Second ball; 15. First high-elasticity rib bundle; 16. First high-elasticity rib bundle perforation; 17. Second high-elasticity rib bundle; 18. Second high-elasticity rib bundle perforation. 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 embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4The present invention provides the following technical solution: The low-vibration automotive generator rotor shaft support assembly includes a rotor shaft 1 and further includes: Offset disk 2 is located at the end of rotor shaft 1 that is away from the rotor and the power source. Offset disk 2 is coaxially and fixedly connected to rotor shaft 1. The precession resistance housing 3 is coaxial with the rotor shaft 1. The precession resistance housing 3 is fixedly installed inside the vehicle and is sleeved on the outside of the offset disk 2. The anti-precession offset component 4 is disposed inside the precession resistance housing 3. The anti-precession offset component 4 includes a first abutment plate 9 and a second abutment plate 10, which are respectively disposed on both sides of the offset plate 2 to prevent rotor vibration caused by precession offset.

[0020] Furthermore, the precession resistance housing 3 includes a first fixing plate 5, a second fixing plate 6, and a central connecting ring 7. The first fixing plate 5 is disposed on the side of the offset disk 2 away from the rotor, the second fixing plate 6 is disposed on the side of the offset disk 2 adjacent to the rotor, and the central connecting ring 7 is disposed between the first fixing plate 5 and the second fixing plate 6, and the two sides of the central connecting ring 7 are fixedly connected to the first fixing plate 5 and the second fixing plate 6.

[0021] Furthermore, a bearing 8 is provided on the second fixed plate 6, and the second fixed plate 6 is rotatably connected to the rotor shaft 1 through the bearing 8.

[0022] Furthermore, the first abutment 9 is disposed between the offset disk 2 and the first fixed plate 5. The side of the first abutment 9 adjacent to the offset disk 2 is provided with an annular first roller cavity 11. Multiple sets of first balls 12 are disposed in the first roller cavity 11, and the first balls 12 are in frictional contact with the offset disk 2.

[0023] Furthermore, the second abutment 10 is disposed between the offset disk 2 and the second fixed plate 6. An annular second roller cavity 13 is provided on the side of the second abutment 10 adjacent to the offset disk 2. Multiple sets of second balls 14 are disposed within the second roller cavity 13, and the second balls 14 make frictional contact with the offset disk 2. The contact area between the circular balls and the offset disk 2 is very small, effectively reducing friction.

[0024] Furthermore, both the first abutment plate 9 and the second abutment plate 10 are coaxial with the offset plate 2, and the first abutment plate 9 and the second abutment plate 10 have relief holes at their centers corresponding to the rotor shaft 1.

[0025] Furthermore, the diameter of the first roller cavity 11 is not equal to the diameter of the second roller cavity 13. The first roller cavity 11 and the second roller cavity 13 are staggered to avoid stress concentration that could damage the offset disk 2.

[0026] Furthermore, multiple sets of first high-elasticity rib bundles 15 are provided between the second abutment plate 10 and the first fixing plate 5. The first abutment plate 9 has first high-elasticity rib bundle through-holes 16 corresponding to the multiple sets of first high-elasticity rib bundles 15. All sets of first high-elasticity rib bundles 15 pass through their corresponding first high-elasticity rib bundle through-holes 16, and both ends of the first high-elasticity rib bundles 15 are fixedly connected to the second abutment plate 10 and the first fixing plate 5, respectively. Compared to ordinary springs, high-elasticity rib bundles can withstand loads for extended periods. If springs are used, they are prone to damage under prolonged loads.

[0027] Furthermore, multiple sets of second high-elasticity rib bundles 17 are provided between the first abutment plate 9 and the second fixing plate 6. The second abutment plate 10 is provided with second high-elasticity rib bundle through holes 18 corresponding to the multiple sets of second high-elasticity rib bundles 17. The multiple sets of second high-elasticity rib bundles 17 all pass through the corresponding second high-elasticity rib bundle through holes 18, and the two ends of the second high-elasticity rib bundles 17 are respectively fixedly connected to the first abutment plate 9 and the second fixing plate 6.

[0028] Furthermore, multiple sets of first high-elasticity tendons 15 are symmetrically distributed in a circle, and multiple sets of second high-elasticity tendons 17 are symmetrically distributed in a circle, with the first high-elasticity tendons 15 and the second high-elasticity tendons 17 arranged alternately. This alternating distribution makes the force distribution more uniform, ensuring that all the first high-elasticity tendons 15 and the second high-elasticity tendons 17 are subjected to uniform force, and preventing some high-elasticity tendons from being subjected to high loads for a long time.

[0029] Structural Description: Rotor shaft 1: The core rotating component of the generator, one end is connected to the rotor and the power source, and the other end is fixed to the offset disk 2, providing a mounting base for the offset disk 2 and driving it to rotate; Offset disk 2: A disc-shaped structure fixed coaxially with rotor shaft 1, used to amplify precession offset and resist precession offset. It is located at the end of rotor shaft 1 away from rotor and power source, with precession resistance shell 3 on the outside and anti-precession offset component 4 abutment disks on both sides. Precession resistance housing 3: A rigid frame composed of a first fixing plate 5, a second fixing plate 6 and a central connecting ring 7, coaxial with the rotor shaft 1 and fixed inside the vehicle, and sleeved on the outside of the offset disk 2 to form a closed cavity to provide support; Anti-precession and offset component 4: disposed inside the precession resistance housing 3, including a first abutment plate 9 and a second abutment plate 10, respectively located on both sides of the offset plate 2, and suppresses precession and offset by cooperating with the offset plate 2; First fixed plate 5: Component of precession resistance housing 3, located on the side of offset disk 2 away from rotor, fixedly connected to central connecting ring 7, used to install first high elastic rib bundle 15 and provide support; Second fixed plate 6: a component of precession resistance housing 3, located on the side of offset disk 2 near the rotor, fixedly connected to the central connecting ring 7, and provided with bearing 8 and second high elastic rib bundle 17. Middle connecting ring 7: A ring-shaped structure connecting the first fixing plate 5 and the second fixing plate 6, located between the two, and fixedly connected to them on both sides to form a closed cavity together; Bearing 8: A rotating connector mounted on the second fixed plate 6, which enables the second fixed plate 6 to be rotatably connected to the rotor shaft 1, ensuring that the rotor shaft 1 can rotate flexibly; First abutment plate 9: A component of the anti-precession offset assembly 4, located between offset plate 2 and first fixed plate 5, with a central hole and a first roller cavity 11 on one side, which contacts offset plate 2 through first ball bearing 12. Second abutment 10: A component of the anti-precession offset assembly 4, located between offset disk 2 and second fixed plate 6, with a central hole and a second roller cavity 13 on one side, which contacts offset disk 2 through second ball bearing 14. First roller cavity 11: An annular groove opened on the side of the first abutment plate 9 near the offset plate 2, containing multiple sets of first balls 12, providing limiting space for the first balls 12; First ball 12: A circular rolling body disposed in the first roller cavity 11, which makes frictional contact with the offset disk 2 to realize the force transmission between the first abutment disk 9 and the offset disk 2; Second roller cavity 13: An annular groove opened on the side of the second abutment plate 10 near the offset plate 2, with a diameter different from that of the first roller cavity 11, and containing multiple sets of second balls 14; Second ball 14: A circular rolling element disposed in the second roller cavity 13, which makes frictional contact with the offset disk 2 to realize the force transmission between the second abutment disk 10 and the offset disk 2; First high-elasticity rib bundle 15: an elastic component connecting the second abutment plate 10 and the first fixed plate 5, multiple sets are symmetrically distributed in a circle, and pass through the first high-elasticity rib bundle through hole 16 of the first abutment plate 9; First high elasticity rib bundle perforation 16: A channel opened on the first abutment plate 9, corresponding to multiple sets of first high elasticity rib bundles 15, through which the first high elasticity rib bundles 15 pass; Second high-elasticity rib bundle 17: an elastic component connecting the first abutment plate 9 and the second fixed plate 6, multiple sets are symmetrically distributed in a circle and staggered with the first high-elasticity rib bundle 15, passing through the perforation of the second abutment plate 10; Second high-elasticity tendon bundle perforation 18: A channel opened on the second abutment plate 10, corresponding to multiple sets of second high-elasticity tendon bundles 17, for the second high-elasticity tendon bundles 17 to pass through.

[0030] Working principle: When the generator moves with the vehicle body during vehicle operation, the high-speed rotating rotor generates a torque relative to the outer casing due to the conservation of angular momentum. This torque drives the rotor shaft 1, causing the offset disk 2 to precess. At this time, the anti-precession offset component 4 suppresses the offset through a dual constraint mechanism: the first abutment 9 and the second abutment 10 form a clamping structure from both sides of the offset disk 2. Under the elastic force of the first high-elasticity rib bundle 15 and the second high-elasticity rib bundle 17, they always maintain stable contact with the offset disk 2, and the elastic potential energy cancels out the deflection kinetic energy brought by the precession torque, greatly reducing the actual offset.

[0031] The rigid frame of the precession resistance shell 3 provides reference support for the entire constraint system: the first fixed plate 5 and the second fixed plate 6 form a closed cavity through the central connecting ring 7, which completely encloses the offset disk 2 and the abutment assembly, ensuring axial positioning accuracy and achieving stable rotation of the rotor shaft 1 through the bearing 8 on the second fixed plate 6, preventing the shell vibration from being directly transmitted to the rotor shaft system. When the rotor shaft 1 shows a radial or angular offset tendency, the offset disk 2 first contacts the ball structure of the abutment on both sides—the first ball 12 in the first roller cavity 11 and the second ball 14 in the second roller cavity 13 form a point contact force transmission mechanism, dispersing the offset force into multiple radial components.

[0032] The elastic adjustment function of the high-elasticity ribs plays a crucial role in this process: the first high-elasticity rib 15, symmetrically distributed in a circle, passes through the first high-elasticity rib perforation 16 of the first abutment plate 9, connecting the second abutment plate 10 and the first fixed plate 5; the second high-elasticity rib 17, arranged in an alternating pattern, passes through the second high-elasticity rib perforation 18 of the second abutment plate 10, connecting the first abutment plate 9 and the second fixed plate 6. This cross-tensioning structure allows the two sets of abutments to synchronously and adaptively adjust their posture with the micro-movement of the offset plate 2. When the offset plate 2 tilts in a certain direction, the high-elasticity rib on the corresponding side is stretched to generate a reverse elastic force, while the other side generates a restoring torque through compression energy storage. This allows the rotor shaft system to make slight precessions while avoiding material extrusion damage caused by rigid constraints.

[0033] The ball contact design further optimizes force transmission efficiency: multiple sets of balls are limited by annular roller cavities, forming a rolling friction pair with the offset disk 2. The contact area is very small, and the coefficient of friction is significantly reduced, which reduces energy loss and avoids sliding friction wear between the bearing disk and the offset disk 2. At the same time, the difference in diameter between the first roller cavity 11 and the second roller cavity 13 causes the ball contact points to be staggered on both sides of the offset disk 2, dispersing contact stress and preventing fatigue cracks on the surface of the offset disk 2 caused by local stress concentration. Through this composite mechanism of "elastic constraint + rolling contact", the component can effectively suppress the severe vibration caused by precession offset and protect the shaft components through micro-adaptive adjustment, ultimately achieving low vibration and long service life.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-vibration automotive generator rotor shaft support assembly, comprising a rotor shaft (1), characterized in that, Also includes: Offset disk (2), the offset disk (2) is disposed at one end of the rotor shaft (1) away from the rotor and the power source, and the offset disk (2) is coaxially and fixedly connected to the rotor shaft (1); Precession resistance housing (3), the precession resistance housing (3) is coaxial with the rotor shaft (1), the precession resistance housing (3) is fixedly installed inside the vehicle, and the precession resistance housing (3) is sleeved on the outside of the offset disk (2); An anti-precession offset assembly (4) is disposed inside the precession resistance housing (3). The anti-precession offset assembly (4) includes a first abutment plate (9) and a second abutment plate (10). The first abutment plate (9) and the second abutment plate (10) are respectively disposed on both sides of the offset plate (2) to avoid rotor vibration caused by precession offset.

2. The low-vibration automotive generator rotor shaft support assembly according to claim 1, characterized in that, The precession resistance housing (3) includes a first fixing plate (5), a second fixing plate (6), and a central connecting ring (7). The first fixing plate (5) is disposed on the side of the offset disk (2) away from the rotor. The second fixing plate (6) is disposed on the side of the offset disk (2) near the rotor. The central connecting ring (7) is disposed between the first fixing plate (5) and the second fixing plate (6), and the two sides of the central connecting ring (7) are fixedly connected to the first fixing plate (5) and the second fixing plate (6).

3. The low vibration automotive generator rotor shaft support assembly of claim 2 wherein, The second fixing plate (6) is provided with a bearing (8), and the second fixing plate (6) is rotatably connected to the rotor shaft (1) through the bearing (8).

4. The low vibration automotive generator rotor shaft support assembly of claim 2 wherein, The first abutment (9) is disposed between the offset disk (2) and the first fixing plate (5). The first abutment (9) has an annular first roller cavity (11) on the side of the offset disk (2) adjacent to the first roller cavity (11). Multiple sets of first balls (12) are disposed in the first roller cavity (11). The first balls (12) are in frictional contact with the offset disk (2).

5. The low-vibration automotive generator rotor shaft support assembly according to claim 4, characterized in that, The second abutment (10) is disposed between the offset disk (2) and the second fixing plate (6). The second abutment (10) has an annular second roller cavity (13) on the side near the offset disk (2). Multiple sets of second balls (14) are disposed in the second roller cavity (13). The second balls (14) are in frictional contact with the offset disk (2).

6. The low-vibration automotive generator rotor shaft support assembly according to claim 5, characterized in that, The first abutment plate (9) and the second abutment plate (10) are both coaxial with the offset plate (2), and the first abutment plate (9) and the second abutment plate (10) have a relief hole at their center corresponding to the rotor shaft (1).

7. The low vibration automotive alternator rotor shaft support assembly of claim 6 wherein, The diameter of the first roller cavity (11) is not equal to the diameter of the second roller cavity (13).

8. The low-vibration automotive generator rotor shaft support assembly according to claim 4, characterized in that, Multiple sets of first high-elasticity rib bundles (15) are provided between the second abutment plate (10) and the first fixing plate (5). The first abutment plate (9) is provided with first high-elasticity rib bundle through holes (16) corresponding to the multiple sets of first high-elasticity rib bundles (15). The multiple sets of first high-elasticity rib bundles (15) pass through the corresponding first high-elasticity rib bundle through holes (16), and the two ends of the first high-elasticity rib bundles (15) are fixedly connected to the second abutment plate (10) and the first fixing plate (5) respectively.

9. The low vibration automotive alternator rotor shaft support assembly of claim 8 wherein, Multiple sets of second high-elasticity rib bundles (17) are provided between the first abutment plate (9) and the second fixing plate (6). The second abutment plate (10) is provided with second high-elasticity rib bundle through holes (18) corresponding to the multiple sets of second high-elasticity rib bundles (17). The multiple sets of second high-elasticity rib bundles (17) pass through the corresponding second high-elasticity rib bundle through holes (18), and the two ends of the second high-elasticity rib bundles (17) are fixedly connected to the first abutment plate (9) and the second fixing plate (6) respectively.

10. The low-vibration automotive generator rotor shaft support assembly according to claim 9, characterized in that, Multiple sets of the first high-elasticity tendon bundles (15) are symmetrically distributed in a circle, and multiple sets of the second high-elasticity tendon bundles (17) are symmetrically distributed in a circle, with the first high-elasticity tendon bundles (15) and the second high-elasticity tendon bundles (17) arranged alternately.

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