Automatic adjustment mechanism and hub motor hoisting structure for rail vehicles

Abstract

The present invention discloses an automatic adjustment mechanism and a hub motor hoisting structure for rail vehicles, characterized by an automatic adjustment mechanism installed at the end of the motor stator support shaft. When the vehicle passes through a curve and the wheel swings during operation, the ball head of the drive support shaft is driven to rotate universally around the spherical bushing in the flange. The annular rubber block and crown nut connected to the flange, and the rubber bushing in the connecting bolt group can produce elastic displacement to adapt to the wheel swing; and the repulsive force between the two annular magnetic steel blocks between the flanges further provides restoring force. When the wheel moves laterally, the entire motor can adapt to the lateral displacement of the vehicle during operation by virtue of the displacement of the spline groove in the inner hole of the flange and the spline shaft. The above structure can ensure that the motor is not damaged.

Description

Technical Field

[0001] The invention belongs to the field of rail transit driving and relates to the hoisting of a power device for rail transit and an automatic adjustment mechanism adopted therefor. Background Art

[0002] Patent document CN201911322873.3 discloses a hub motor that directly drives the wheels of urban rail vehicles. When coupled to the vehicle, this motor is susceptible to mechanical failures in the disc motor and unstable operation of the vehicle due to serpentine oscillation and lateral movement caused by the vehicle traversing curves, uneven rails, or wheel core offset. This poses a significant safety hazard to the safe operation of the vehicle. To address these issues, the present application proposes an automatic adjustment mechanism for the hub motor to accommodate the serpentine oscillation and lateral movement of the vehicle wheels.

[0003] With the rapid development of the motor field, high-power automotive hub motors have been designed and manufactured. In order to simultaneously achieve high torque to directly drive the wheels and improve the safety and smoothness of train operation, it is hoped to design a high-power direct-drive hub motor, in which the motor rotor is directly connected to the wheel, directly driving the wheel to avoid the mechanical loss problem caused by the transmission asynchronous motor plus gearbox mechanism, thereby improving mechanical conversion efficiency and the smoothness of train operation. However, in actual application, it is found that hub motors are easily damaged. After research and analysis, it is found that when the wheels are traveling on curved routes, there is serpentine swing and lateral movement of the wheels, which causes mechanical damage to the hub motor.

[0004] To address the issue of in-wheel motor damage, this invention seeks to design a novel automatic adjustment mechanism for serpentine swing and lateral movement. The support shaft end flange and the hoisting shaft end flange are connected together via a crown nut and connecting bolt assembly. The support shaft ball head can move universally around the flange's spherical gasket surface. The convex periphery of the spline sleeve matches the hollow, concave center of the fixed hoisting shaft spline end. During lateral movement, the spline sleeve can move along the fixed hoisting shaft spline end. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic adjustment mechanism and an in-wheel motor mounting structure for rail vehicles that can protect the in-wheel motor during serpentine and lateral motion. This mechanism can adapt to the curvilinear and lateral motion of the train wheels while reducing the vehicle's unsprung weight. Furthermore, the mechanism ensures that the train wheels continue to operate normally, continuously, stably, and safely even under the severe vibrations generated by high-speed train operation.

[0006] To achieve this objective, the present invention provides an automatic adjustment mechanism comprising flanges 1 and 2, each connected by a flange flange plate. Circular rubber blocks are positioned on the contact surfaces of the flange plates. Through holes are defined in the outer edges of the flange plates, and rubber sleeves are positioned within the inner walls of the through holes. Bolts pass through the corresponding rubber sleeves of the flange plates and connect to crown nuts to achieve the connection between flanges 1 and 2. When flanges 1 and 2 rotate or move, the connected circular rubber blocks, the crown nuts, and the rubber bushings in the bolts elastically deform to accommodate the rotation or displacement.

[0007] Furthermore, annular grooves are formed on the opposing surfaces of the two flanges, and screw holes are formed at the bottoms of the annular grooves. A magnetic ring is mounted at the bottoms of the annular grooves and screwed through the screw holes. A circular magnet is disposed above the magnetic ring, and a magnet protection plate is disposed above the circular magnet. The magnet protection plate is fixed to the surface of the flanges via screws. The circular magnets on flanges 1 and 2 generate a repulsive force against each other, further providing a restoring force when flanges 1 and 2 are displaced.

[0008] Furthermore, a through hole is provided in the center of the flange.

[0009] Furthermore, a spherical lining is provided on the surface of the flange flange of the second flange.

[0010] Furthermore, a ball head is provided at the end of the shaft connected to a through hole of the flange. The ball head is located in the spherical lining bush and is rotatably connected to the spherical lining bush.

[0011] Furthermore, an inner spline groove is provided in the axial direction of the second flange.

[0012] Furthermore, a spline shaft capable of axial displacement is provided in the inner spline groove.

[0013] To achieve the purpose of the invention, the present invention designs a hub motor hoisting structure for rail vehicles, including a hub motor, the hub motor including a support shaft rotatably connected to the mover, an automatic adjustment mechanism installed on the hub motor support shaft, and connected to the bogie chassis through the automatic adjustment mechanism.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The automatic adjustment mechanism designed in this invention features a crown nut connecting the support shaft end flange assembly and the fixed lifting shaft end flange assembly. The crown nut prevents relative movement between the nut and bolt, ensuring a stable connection between the support shaft end flange assembly and the lifting shaft flange while providing space for the annular rubber block and rubber sleeve to elastically deform, mitigating impact forces. Two magnetic steel blocks are installed between the support shaft end flange assembly and the lifting shaft flange. When the curved motion is eliminated, the two magnetic steel blocks generate a repulsive force, instantly restoring the elastic deformation of the annular rubber block and rubber sleeve.

[0016] By installing an automatic adjustment mechanism, the impact of serpentine swing and lateral movement caused by the vehicle passing through curves, uneven rails, and wheel core deviation on the disc motor can be avoided, the mechanical loss of the disc motor can be reduced, and the vehicle can still work normally, continuously, smoothly and safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attachment Figure 1 : Overall structure diagram of automatic adjustment mechanism.

[0018] Attachment Figure 2 : Schematic diagram of the hub motor hoisting structure.

[0019] Figure numerals: 1, shaft; 2, flange 1; 3, annular magnet; 4, rubber sleeve; 5, annular rubber block; 6, crown nut and bolt assembly; 7, flange 2; 8, spline shaft; 10, automatic adjustment mechanism; 20, hub motor; 30, support shaft; 40, bogie. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific implementation methods and with reference to the accompanying drawings.

[0021] like Figure 1 The figure shows an automatic adjustment mechanism comprising flanges 1 and 2, connected by flange flanges. Circular rubber blocks are positioned on the contact surfaces of the flanges. Through holes are defined along the outer edges of the flanges, and rubber sleeves are positioned within the inner walls of the through holes. Bolts pass through the corresponding rubber sleeves on the flanges and connect to crown nuts, effectively connecting flanges 1 and 2. When flanges 1 and 2 rotate or move, the connected circular rubber blocks, crown nuts, and rubber bushings in the bolts elastically deform to accommodate the rotation or displacement.

[0022] Furthermore, annular grooves are formed on the opposing surfaces of the two flanges, and screw holes are formed at the bottoms of the annular grooves. A magnetic ring is mounted at the bottoms of the annular grooves and screwed through the screw holes. A circular magnet is disposed above the magnetic ring, and a magnet protection plate is disposed above the circular magnet. The magnet protection plate is fixed to the surface of the flanges via screws. The circular magnets on flanges 1 and 2 generate a repulsive force against each other, further providing a restoring force when flanges 1 and 2 are displaced.

[0023] Furthermore, a through hole is provided in the center of the flange.

[0024] Furthermore, a spherical lining is provided on the surface of the flange flange of the second flange.

[0025] Furthermore, a ball head is provided at the end of the shaft connected to the flange through hole, the ball head is located in the spherical lining bush, and the ball head is rotatably connected to the spherical lining bush.

[0026] Furthermore, an inner spline groove is provided in the axial direction of the second flange.

[0027] Furthermore, a spline shaft capable of axial displacement is provided in the inner spline groove.

[0028] like Figure 2 Shown: A hub motor hoisting structure for rail vehicles, with an automatic adjustment mechanism installed on the hub motor support shaft, which is connected to the bogie chassis through the automatic adjustment mechanism.

[0029] Furthermore, the support shaft is connected to the shaft, and the support shaft and the shaft can be an integral structure. The bogie chassis is connected to the spline shaft through the hanging shaft. Further, the hanging shaft and the spline shaft can be an integral structure.

[0030] Furthermore, the hub motor includes a hub motor support shaft, and the automatic adjustment mechanism includes a ball head provided at one end of the support shaft, wherein the end of the support shaft provided with the ball head is connected to the support shaft end flange by bolts. The support shaft end flange is connected to the lifting shaft end flange. A through hole is provided in the center of the support shaft end flange for the support shaft and its ball head to pass through, and the passed support shaft is connected to the pipe wall of the support shaft end flange by bolts. A through hole is provided in the flange disk of the support shaft end flange, and a rubber sleeve is provided on the inner wall of the through hole. An annular groove is provided on the surface of the flange disk of the support shaft end flange, and the annular groove is located between the through hole and the through hole. A screw hole is provided at the bottom of the annular groove, and a magnetic ring is installed at the bottom of the annular groove. The magnetic ring is installed by screws passing through the screw hole. A circular magnet is provided above the magnetic ring, and a magnet protection plate is provided above the circular magnet, and the magnet protection plate is fixed to the surface of the flange disk by screws. An internal spline groove is provided on one side of the lifting shaft end flange, and a spherical bushing is provided at the center of the flange disk on the other side opposite the internal spline groove. An annular groove is provided on the outer periphery of the spherical bushing, and a screw hole is provided at the bottom of the annular groove. A magnetic ring is installed at the bottom of the annular groove and is installed by screws passing through the screw hole. A circular magnet is provided above the magnetic ring, and a magnet protection plate is provided above the circular magnet. The magnet protection plate is fixed to the surface of the flange disk of the lifting shaft end flange by screws. A through hole is provided in the flange disk of the lifting shaft end flange, and a rubber sleeve is provided on the inner wall of the through hole on the flange disk.

[0031] When a rail vehicle's wheels swing during operation, the rotor disc of the motor, integrated with the wheel hub, drives the ball head of the support shaft, causing it to rotate universally around the spherical bushing in the lifting shaft end flange. The connected annular rubber block and the rubber bushings in the crown nuts and bolts elastically deform to accommodate the wheel's swing. Furthermore, two annular magnetic steel blocks are positioned between the support shaft end flange and the lifting shaft end flange, generating a repulsive force between the two annular magnetic steel blocks, further providing restoring force to restore the wheels to their normal position. When the EMU wheels move laterally, the entire hub motor mechanism moves by means of the spline grooves in the inner bore of the lifting shaft end flange and the spline shaft that slides together on the fixed lifting shaft, adapting to the EMU's lateral displacement during operation.

Claims

1. An automatic adjustment mechanism, characterized in that: It includes flange 1 and flange 2, which are connected by flange flanges respectively, and circular rubber blocks are respectively provided on the contact surfaces of the two flange flanges; Through holes are provided on the outer edges of the two flange flanges, and rubber sleeves are provided on the inner walls of the through holes. Crown nuts and bolts pass through the two corresponding rubber sleeves of the two flange flanges to realize the connection between flange one and flange two. When flange 1 and flange 2 rotate or displace relative to each other, the rubber bushing in the annular rubber block and the crown nut and bolt assembly connected thereto can produce elastic deformation to adapt to the rotation or displacement; Annular grooves are respectively provided on the opposing surfaces of the two flange flanges, screw holes are provided at the bottoms of the annular grooves, a magnetic conductive ring is installed at the bottoms of the annular grooves, the magnetic conductive ring is installed by screws passing through the screw holes, an annular magnet is provided above the magnetic conductive ring, a magnet protection plate is provided above the annular magnet, the magnet protection plate is fixed to the surface of the flange flange by screws, and the annular magnets on flange one and flange two generate repulsive force on each other; A through hole is provided in the center of flange one, and a ball head is provided at the end of the shaft connected to the through hole of flange one; a spherical lining is provided on the surface of the flange flange of flange two, and the ball head is located in the spherical lining, and the ball head is rotatably connected to the spherical lining.

2. The automatic adjustment mechanism according to claim 1, characterized in that: A through hole is provided in the center of the flange.

3. The automatic adjustment mechanism according to claim 1, characterized in that: A spherical lining is provided on the surface of the flange flange of flange 2.

4. The automatic adjustment mechanism according to claim 1, characterized in that: An internal spline groove is provided in the axial direction of flange 2.

5. The automatic adjustment mechanism according to claim 4, characterized in that: A spline shaft capable of axial displacement is arranged in the inner spline groove.

6. A hub motor hoisting structure for a rail vehicle, comprising a hub motor, wherein the hub motor comprises a support shaft rotatably connected to a mover, and an automatic adjustment mechanism according to any one of claims 1 to 5 is installed on the hub motor support shaft, and is connected to a bogie chassis via the automatic adjustment mechanism.

7. The in-wheel motor hoisting structure for a rail vehicle according to claim 6, characterized in that: The support shaft is connected to flange 1, and flange 2 is connected to the bogie chassis.

8. The in-wheel motor hoisting structure for a rail vehicle according to claim 6, characterized in that: Flange 2 is connected to the bogie chassis through a spline shaft.

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