Rubber wheel subway bogie driven by hub motors

Abstract

The invention provides a rubber wheel metro bogie driven by hub motors. The rubber wheel metro bogie driven by the hub motors comprises bent shafts, longitudinal beams, rubber wheel assemblies, hub motor driving devices, high-rim steel wheels, secondary suspension devices, traction rod assemblies, foundation brake devices, guide wheel assemblies and guide wheel mounting beams. The two ends of the bent shaft are connected with the high-rim steel wheel through bearings, the middle of the bent shaft is provided with an installation connector of a traction pull rod, and the two ends of the bent shaft are provided with installation connectors of longitudinal beams and guide wheel installation beams. The two ends of the longitudinal beam are connected with a front bent shaft and a rear bent shaft of the bogie through fasteners, the two sides of the two bent shafts are connected with the guide wheel installation beams, and the two ends of the two bent shafts are sequentially connected with the high-rim steel wheels and the rubber wheels respectively. The vehicle can have more efficient and more reliable power, the structure is more simplified, and the curve passing capacity of the vehicle is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of rail vehicle bogie manufacturing, and in particular relates to a rubber-wheel subway bogie driven by a wheel hub motor. Background Art

[0002] Rubber-tyred metro bogies have the advantages of low noise, high comfort, strong climbing ability, etc. They are widely used in France, Japan and America, and there is a trend of expanding the application market. At present, according to different driving modes, rubber-tyred metro bogies are mainly divided into two structural forms.

[0003] The first type of rubber-tyred subway bogie mainly uses a longitudinally arranged traditional motor to drive the axle with a differential, thereby driving the rubber tires on both sides of the axle to rotate to output traction. According to the overall spatial layout of the bogie, the traction motor is arranged either in the middle of the bogie (between the two axles) or at the two ends of the bogie (outer ends of the axle). When the traction motor is arranged in the middle of the bogie, the fixed wheelbase of the bogie will be larger. Although it can improve the running stability of the vehicle to a certain extent, it will also cause the bogie to be heavier and reduce the curve passability; when the traction motor is arranged at both ends of the bogie, the bogie end vibrates more, thereby increasing the inertial load generated by the traction motor and affecting the strength of the bogie frame. At the same time, the axle structure with a differential is more complicated, and the cost of daily inspection and maintenance is higher.

[0004] The second type of rubber-tyred subway bogie mainly adopts axle-clamping direct-drive motors, which directly drive the rubber-tyred axle structure to output traction. The use of axle-clamping direct-drive motors can reduce the fixed wheelbase of the bogie to a certain extent, but due to the large weight and diameter of the motor, it is not conducive to the lightweighting of the bogie and will also affect the height of the floor surface of the entire vehicle. Summary of the invention

[0005] The present invention aims to solve the above-mentioned problems of rubber-tyred subway bogies, thereby providing a rubber-tyred subway bogie driven by a wheel hub motor, which has a simplified bogie structure, is lightweight, has a lower floor height, and reduces repair and maintenance costs.

[0006] To achieve the above-mentioned invention object, the present invention provides a hub motor driven rubber-wheeled subway bogie, comprising a bent axle, a longitudinal beam, a rubber wheel component, a hub motor driving device, a high-rim steel wheel, a secondary suspension device, a traction rod component, a basic braking device, a guide wheel component, and a guide wheel mounting beam; both ends of the bent axle are connected to the high-rim steel wheel through bearings, a mounting interface for the traction rod is provided in the middle of the bent axle, and mounting interfaces for the longitudinal beam and the guide wheel mounting beam are provided at both ends of the bent axle; both ends of the longitudinal beam are connected to the front and rear bent axles of the bogie through fasteners, the longitudinal beam provides a mounting interface for the secondary suspension device, the two sides of the two bent axles are connected to the guide wheel mounting beam, the two ends of the two bent axles are respectively connected to the high-rim steel wheel and the rubber wheel component, the rubber wheel component adopts a rubber tire, a set of hub motor driving devices is installed in each wheel hub, and the two ends of the hub motor driving device are respectively connected to the rubber wheel component and the high-rim steel wheel; the basic braking device adopts air tread braking, and the brake cylinder is installed above the guide wheel mounting beam; the guide wheel component is installed below the guide wheel mounting beam through a bearing.

[0007] Furthermore, the secondary suspension device includes a secondary air spring, a secondary lateral shock absorber, a secondary vertical shock absorber, an anti-roll torsion bar and a lateral stop.

[0008] Furthermore, the hub motor drive device includes a hub motor and a planetary reduction mechanism. The output shaft of the hub motor drives the sun gear in the planetary reduction mechanism to rotate, and drives the planetary gear to rotate to achieve the purpose of deceleration. The planetary gear is installed on the planetary gear bracket. One end of the planetary gear bracket is connected to the hub composed of the rubber wheel through a fastener, and the other end is interference connected to the high-rim steel wheel through the planetary gear bracket shaft.

[0009] Furthermore, the traction rod adopts a single rod structure, one end of which is connected to the middle part of the bogie bending shaft, and the other end is connected to the car body.

[0010] Compared with the existing rubber-wheeled subway bogie, the present invention adopts a wheel hub motor drive, and a wheel hub motor drive device is installed inside each rubber wheel, which can make the vehicle have more efficient and reliable power and further improve its climbing ability. The rubber-wheeled subway bogie driven by the wheel hub motor will eliminate the axle structure with a differential, making the entire bogie structure simpler, more maintainable, and reducing the cost of inspection and maintenance. The traction motor is installed in the wheel hub of the rubber wheel, which completely releases the internal space of the bogie, and can greatly reduce the fixed wheelbase of the bogie. The fixed wheelbase of the bogie can be shortened from 2000mm to 1600-1800mm, which is conducive to improving the curve passing ability of the vehicle. With the wheel hub motor, the four wheels of the rubber-wheeled subway bogie can rotate completely independently, which can effectively reduce tire wear. The axle with a differential is eliminated and replaced by a bent axle with a simple structure, which can greatly reduce the height of the vehicle floor surface, promote the reduction of the platform height, and thus greatly reduce the cost of platform repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A top view of a rubber-wheeled subway bogie driven by a wheel hub motor;

[0012] Figure 2 The left side schematic diagram of the rubber-wheeled subway bogie driven by the wheel hub motor;

[0013] Figure 3 It is a schematic diagram of a cross-section of a rubber-tyred subway bogie driven by a wheel hub motor along the axial centerline of the bent axis.

[0014] Among them: 1. Bending axis; 2. Longitudinal beam; 3. Rubber wheel composition; 4-1. Hub motor; 4-2. Planetary reduction mechanism; 5. High-rim steel wheel; 6-1. Secondary air spring; 6-2. Secondary lateral shock absorber; 6-3. Secondary vertical shock absorber; 6-4. Anti-roll torsion bar; 6-5. Lateral stop; 7. Traction rod composition; 8. Basic braking device; 9. Guide wheel composition; 10. Guide wheel mounting beam. DETAILED DESCRIPTION

[0015] In order to better understand the purpose, structure and function of the present invention, a rubber-wheeled subway bogie driven by a wheel hub motor of the present invention is further described in detail below with reference to the accompanying drawings.

[0016] Reference Figures 1 to 3 A hub motor driven rubber-wheeled subway bogie of the present invention comprises a bent axle 1, a longitudinal beam 2, a rubber wheel assembly 3, a hub motor driving device, a high-rim steel wheel 5, a secondary suspension device, a traction rod assembly 7, a basic braking device 8, a guide wheel assembly 9, a guide wheel mounting beam 10, etc.

[0017] The bent shaft 1 adopts an integral forging structure, which is simple in structure, meets the strength requirements, and has low maintenance costs. The use of the bent shaft 1 can effectively reduce the height of the vehicle floor surface. The two ends of the bent shaft 1 are connected to the high-rim steel wheels 5 through bearings, and the middle of the bent shaft is provided with a mounting interface for the traction rod assembly 7, and the two ends of the bent shaft are provided with mounting interfaces for the longitudinal beam 2, the guide wheel mounting beam 10, and the transverse stopper 6-5.

[0018] The longitudinal beam 2 and the guide wheel mounting beam 10 can adopt a box-type structure of a steel plate and a casting and forging combination welding, or an integral casting structure, which can ensure that they have sufficient strength to meet the use requirements. The two ends of the longitudinal beam 2 are connected to the front and rear bending shafts of the bogie through fasteners. At the same time, the longitudinal beam 2 provides a mounting interface for the secondary suspension device, which includes secondary air springs 6-1, secondary lateral shock absorbers 6-2, secondary vertical shock absorbers 6-3, anti-roll torsion bars 6-4 and other components.

[0019] The two sides of the two curved shafts are connected to the guide wheel mounting beams 10, and the two ends of the two curved shafts are respectively connected to the high-rim steel wheel 5 and the rubber wheel assembly 3 in sequence. The guide wheel mounting beams 10 provide installation interfaces for the basic braking device 8 and the guide wheel assembly 9.

[0020] Each bogie is provided with four rubber wheel components 3, and the rubber wheel components 3 use rubber tires. A set of hub motor drive devices is installed in each wheel hub to ensure that the bogie has sufficient power. The two ends of the hub motor drive device are respectively connected to the rubber wheel components 3 and the high wheel rim steel wheel 5. The hub motor drive device includes a hub motor 4-1 and a planetary reduction mechanism 4-2. The output shaft of the hub motor 4-1 drives the sun gear in the planetary reduction mechanism to rotate, and drives the planetary gear to rotate to achieve the purpose of speed reduction. The planetary gear is installed on the planetary gear bracket. One end of the planetary gear bracket is connected to the hub of the rubber wheel component 3 through a fastener, and the other end is connected to the high wheel rim steel wheel 5 through an interference fit through the planetary gear bracket shaft, so as to achieve the purpose of driving the rubber wheel component 3 and the high wheel rim steel wheel 5 at the same time, and ensure that the two have the same rotation speed.

[0021] The use of the wheel hub motor drive device 4 can effectively release the internal space of the bogie and reduce the middle height of the bogie, which is beneficial to shortening the fixed wheelbase of the bogie, reducing the weight of the bogie, and improving the curve passing ability of the bogie. At the same time, it is beneficial to lower the vehicle floor surface and reduce the platform repair cost.

[0022] The high-rim steel wheel 5 is installed on the inner side of each rubber wheel assembly 3. When the vehicle is running, the high-rim steel wheel 5 rotates at the same speed as the adjacent rubber wheel assembly 3, but the tread of the high-rim steel wheel 5 does not contact the track. When passing through the turnout, the bogie uses the rim of the high-rim steel wheel 5 to contact the side of the track to ensure that the vehicle passes the turnout safely at the normal operating speed. At this time, the rim is used for guidance. At the same time, the high-rim steel wheel 5 also serves as an emergency wheel. When the rubber wheel assembly 3 fails to be air-tight, the tread of the high-rim steel wheel 5 contacts the rail to provide support and ensure that the vehicle can continue to travel safely.

[0023] The secondary suspension device includes an air spring 6-1, a secondary lateral shock absorber 6-2, a secondary vertical shock absorber 6-3, an anti-roll torsion bar 6-4 and a lateral stopper 6-5. The vehicle comfort can be effectively improved through reasonable parameter setting.

[0024] The traction rod 7 adopts a single rod structure, one end of which is connected to the bogie bent shaft, and the other end is connected to the car body, so as to transfer the longitudinal load between the bogie and the car body.

[0025] The basic brake device 8 adopts air tread brake, and the brake cylinder is installed above the guide wheel mounting beam 10. When braking, the brake shoe contacts the rotating steel wheel tread, thereby generating braking force.

[0026] The guide wheel assembly 9 is installed under the guide wheel mounting beam 10 through a bearing, and each bogie is equipped with 4 sets of guide wheel assembly 9, which are respectively located at the four corners of the bogie. The guide wheel is installed horizontally and contacts the guide beams on both sides of the line to guide the vehicle.

Claims

1. A rubber-wheeled subway bogie driven by a wheel hub motor, characterized in that: The invention comprises a bent axle (1), a longitudinal beam (2), a rubber wheel assembly (3), a wheel hub motor drive device (4), a high wheel flange steel wheel (5), a secondary suspension device, a traction rod assembly (7), a basic braking device (8), a guide wheel assembly (9), and a guide wheel mounting beam (10); the two ends of the bent axle (1) are connected to the high wheel flange steel wheel (5) through bearings, a mounting interface for the traction rod (7) is arranged in the middle of the bent axle, and mounting interfaces for the longitudinal beam (2) and the guide wheel mounting beam (10) are arranged at the two ends of the bent axle; the two ends of the longitudinal beam (2) are connected to the two bent axles at the front and rear of the bogie through fasteners, and the longitudinal beam (2) is The secondary suspension device provides an installation interface, the two sides of the two bent shafts are connected to the guide wheel mounting beam (10), the two ends of the two bent shafts are respectively connected to the high wheel flange steel wheel (5) and the rubber wheel assembly (3), the rubber wheel assembly (3) uses a rubber tire, and a set of wheel hub motor drive device (4) is installed in each wheel hub, and the two ends of the wheel hub motor drive device (4) are respectively connected to the rubber wheel assembly (3) and the high wheel flange steel wheel (5); the basic brake device (8) uses air tread brake, and the brake cylinder is installed above the guide wheel mounting beam (10); the guide wheel assembly (9) is installed below the guide wheel mounting beam (10) through a bearing.

2. The rubber-tyred subway bogie driven by a wheel hub motor according to claim 1, characterized in that: The secondary suspension device comprises a secondary air spring (6-1), a secondary lateral shock absorber (6-2), a secondary vertical shock absorber (6-3), an anti-roll torsion bar (6-4) and a lateral stopper (6-5).

3. The rubber-tyred subway bogie driven by a hub motor according to claim 1, characterized in that: The wheel hub motor drive device comprises a wheel hub motor (4-1) and a planetary reduction mechanism (4-2). The output shaft of the wheel hub motor (4-1) drives the sun gear in the planetary reduction mechanism to rotate, and drives the planetary gear to rotate to achieve the purpose of speed reduction. The planetary gear is mounted on a planetary gear bracket. One end of the planetary gear bracket is connected to the hub of the rubber wheel assembly (3) through a fastener, and the other end is interference-connected to the high-rim steel wheel (5) through the planetary gear bracket shaft.

4. The rubber-tyred subway bogie driven by a hub motor according to claim 1, characterized in that: The traction rod (7) adopts a single rod structure, one end of which is connected to the middle part of the bogie bending shaft, and the other end of which is connected to the vehicle body.

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