An articulated electric drive dump truck wheel assembly

Abstract

An articulated electric drive dump truck wheel assembly includes a wheel-side reducer, a traction motor, a brake, and a wheel rim mounted on the wheel-side reducer. The wheel-side reducer is located outside the traction motor, and the brake is located inside the traction motor. The wheel-side reducer, traction motor, and brake are connected by a spline. The wheel rim is located on the output end and is connected to the output end by a pressure block. The end face of the wheel rim has a pressing plane, and the end face of the output end of the wheel-side reducer has a 28° pressing slope. The pressure block is bolted to the output end, and the pressure block presses against both the pressing plane and the pressing slope. This invention has high transmission efficiency and good versatility.

Description

Technical Field

[0001] This invention relates to the field of dump truck technology, and in particular to an articulated electric drive dump truck wheel assembly. Background Technology

[0002] The wheel assembly of a dump truck mainly consists of tires, rims, wheel-side reducers, traction motors, brakes, and related components. It is typically assembled as a complete assembly using a modular design approach, completed under the truck and then hoisted onto it. Currently, articulated dump trucks on the market usually employ a mechanical transmission structure. Although they also use a three-axle structure, the power is centralized, with the engine as the sole power source. Mechanical energy is distributed to the front, middle, and rear axles via a gearbox and transfer case, driving the vehicle forward or backward. Current mechanically driven articulated dump trucks typically use three different forged axles as drive components. This axle design is complex, the three axles are not interchangeable, and the wheel assembly itself is not interchangeable, resulting in low transmission efficiency. Therefore, it is necessary to design a wheel assembly that is interchangeable for the front, middle, and rear axles, and to adopt a wheel-side motor drive system, eliminating the need for a driveshaft and transfer case, which would significantly improve transmission efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an articulated electric drive dump truck wheel assembly with high transmission efficiency and good versatility.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: an articulated electric drive dump truck wheel assembly, including a wheel-side reducer, a traction motor, a brake, and a wheel rim mounted on the wheel-side reducer. The wheel-side reducer is located outside the traction motor, and the brake is located inside the traction motor. The wheel-side reducer, the traction motor, and the brake are connected by a spline. The wheel-side reducer includes an input end, an output end, and a transmission mechanism located between the input end and the output end. The wheel rim is mounted on the output end, and the wheel rim is connected to the output end by a pressure block. The end face of the wheel rim has a pressing plane, and the end face of the output end of the wheel-side reducer has a 28° pressing slope. The pressure block is bolted to the output end, and the pressure blocks are respectively... The components are pressed against the extrusion plane and the extrusion slope; mounting seats are provided on both sides of the outer wall of the traction motor, the mounting seats are welded to the outer wall of the traction motor, the top of the mounting seat is provided with a first hinge seat, the bottom of the mounting seat is provided with a second hinge seat, and the side of the mounting seat is provided with a third hinge seat. A first tie rod is provided at the first hinge seat, a second tie rod is provided at the second hinge seat, and a suspension cylinder is provided at the third hinge seat. A connecting rod is provided between the two first tie rods to form an H tie rod, and the two second tie rods are distributed in a figure-eight shape; the brake includes a brake disc, friction pads, a piston, and a spring. The brake disc is directly connected to the main shaft of the traction motor through a spline. When braking is required, the pressure oil in the brake piston oil ring is released, and the piston pushes the friction pads against the brake disc under the pressure of the spring. The principle of this invention: The wheel-side reducer, traction motor, and brake are connected by a spline, resulting in higher transmission efficiency; the wheel clamping block adopts a straight structure, and the end face of the reducer is made into a 28° inclined structure. The clamping block uses the positive pressure of bolts and nuts to hold the wheel rim firmly against the 28° inclined surface of the reducer, thus achieving the effect of a traditional clamping block with a 28° inclined surface. During disassembly, the clamping block can be easily removed by simply removing the fixing nut; the traction motor adopts a dual suspension scheme, with each motor connected to the frame by two suspension cylinders to achieve independent suspension. Independent suspension has better ride comfort and less impact on the frame than non-independent suspension.

[0005] As an improvement, the transmission mechanism of the wheel-side reducer adopts a two-stage planetary gear.

[0006] As an improvement, the bolt is provided with a nut for clamping the block, the block is provided with an arc-shaped groove, and the nut is provided with an arc-shaped protrusion corresponding to the arc-shaped groove.

[0007] As an improvement, the traction motor's output cable is located at the top of the housing between the two first hinge seats.

[0008] As an improvement, the mounting base includes a mounting block welded to the housing of the traction motor. The mounting block has a top surface, a side surface, and a bottom surface. The top surface of the mounting block is provided with a top plate, which is bolted to the mounting block. A first hinge seat is provided on the top plate. The bottom surface of the mounting block is provided with a bottom plate, which is bolted to the mounting block. A second hinge seat is provided on the bottom plate. The side surface of the mounting block is provided with a side plate, which is bolted to the mounting block. A third hinge seat is provided on the side plate.

[0009] The beneficial effects of this invention compared to the prior art are:

[0010] The wheel-side reducer, traction motor, and brake are connected by splines, resulting in higher transmission efficiency. The wheel clamping block adopts a straight structure, while the reducer end face is made into a 28° inclined structure. The clamping block uses the positive pressure of bolts and nuts to hold the wheel rim firmly against the 28° inclined surface of the reducer, thus achieving the effect of a traditional clamping block with a 28° inclined surface. During disassembly, the clamping block can be easily removed by simply removing the fixing nut. The traction motor adopts a dual suspension scheme, with each motor connected to the frame by two suspension cylinders to achieve independent suspension. Independent suspension has better ride comfort and less impact on the frame than non-independent suspension. Attached Figure Description

[0011] Figure 1 Schematic diagram I for the wheel assembly.

[0012] Figure 2 Schematic diagram II for the wheel assembly.

[0013] Figure 3 This is a schematic diagram showing the connection between the wheel assembly and the frame.

[0014] Figure 4 This is a schematic diagram showing the fit between the wheel rim and the wheel-side reducer.

[0015] Figure 5 This is a cross-sectional view of the wheel-side reducer.

[0016] Figure 6 This is a cross-sectional view of the brake. Detailed Implementation

[0017] The present invention will now be further described with reference to the accompanying drawings.

[0018] like Figure 1 , 2 As shown, an articulated electric drive dump truck wheel assembly includes a wheel-side reducer 1, a traction motor 2, a brake 3, and a wheel rim 16 mounted on the wheel-side reducer 1. The wheel-side reducer 1 is located on the outside of the traction motor 2, and the brake 3 is located on the inside of the traction motor 2. The wheel-side reducer 1, the traction motor 2, and the brake 3 are connected by a spline, resulting in higher transmission efficiency.

[0019] like Figure 4 , 5 As shown, the wheel-side reducer 1 includes an input end 19, an output end 17, and a transmission mechanism 18 disposed between the input end 19 and the output end 17. The transmission mechanism 18 of the wheel-side reducer 1 uses a two-stage planetary gear system, enabling a large reduction ratio with a relatively small size. The reducer diameter is approximately 636mm, the reduction ratio can reach 28.8, and the transmission efficiency reaches 96%. The wheel rim 16 is disposed on the output end 17, and the wheel rim 16 is connected to the output end 17 via a pressure block 11. The end face of the wheel rim 16 has a pressing plane, and the end face of the output end 17 of the wheel-side reducer 1 has a 28° pressing slope. The pressure block 11 is locked to the output end 17 by bolts 14, and the pressure block 11 is pressed against both the pressing plane and the pressing slope. The bolts 14 have nuts 15 for pressing the pressure block 11, the pressure block 11 has an arc-shaped groove, and the nuts have arc-shaped protrusions corresponding to the arc-shaped groove. The wheel clamping block 11 adopts a straight structure, and the end face of the reducer is made into a 28° inclined structure. The clamping block 11 uses the positive pressure of the bolts and nuts to hold the wheel rim 16 only against the 28° inclined surface of the reducer, thereby achieving the effect of the traditional clamping block 11 being made into a 28° inclined surface. When disassembling, the clamping block 11 can be easily removed after the fixing nut is removed.

[0020] like Figures 2 to 3 As shown, mounting seats 4 are provided on both sides of the outer wall of the traction motor 2. The mounting seats 4 are welded to the outer wall of the traction motor 2. The top of the mounting seat 4 is provided with a first hinge seat 5, the bottom of the mounting seat 4 is provided with a second hinge seat 6, and the side of the mounting seat 4 is provided with a third hinge seat 7. A first tie rod 8 is provided at the first hinge seat 5. The first tie rod 8 is a horizontal tie rod. A second tie rod 10 is provided at the second hinge seat 6. The second tie rod 10 is a diagonal tie rod. A suspension cylinder 13 is provided at the third hinge seat 7. A connecting rod 9 is provided between the two first tie rods 8 to form an H tie rod. The two second tie rods 10 are distributed in a figure-eight shape. The mounting base 4 includes a mounting block welded to the housing of the traction motor 2. The mounting block has a top surface, side surface, and bottom surface. The top surface of the mounting block has a top plate 41, which is bolted to the mounting block. A first hinge seat 5 is located on the top plate 41. The bottom surface of the mounting block has a bottom plate 43, which is bolted to the mounting block. A second hinge seat 6 is located on the bottom plate 43. The side surface of the mounting block has a side plate 42, which is bolted to the mounting block. A third hinge seat 7 is located on the side plate 42. The traction motor 2 integrates the connection point between the wheel assembly and the suspension of the frame. This design not only saves a lot of space and makes full use of the external structure of the traction motor 2, but also enables independent suspension arrangement in a smaller space. At the same time, the traction motor 2 adopts a dual suspension support scheme, with each motor connected to the frame by two suspension cylinders to achieve independent suspension. Independent suspension has better ride comfort and less impact on the frame than non-independent suspension.

[0021] like Figure 6 As shown, the brake 3 includes a brake disc 31, friction pads 32, a piston, and a spring 33. The brake disc 31 is directly connected to the main shaft of the traction motor 2 via a spline. When braking is required, the pressure oil in the piston oil ring of the brake 3 is released, and the piston pushes the friction pads 32 toward the brake disc 31 under the pressure of the spring 33.

[0022] The principle of this invention: The wheel-side reducer 1, traction motor 2, and brake 3 are connected by a spline, resulting in higher transmission efficiency; the wheel pressure block 11 adopts a straight structure, and the end face of the reducer is made into a 28° inclined structure. The pressure block 11 uses the positive pressure of bolts and nuts to hold the wheel rim 16 only against the 28° inclined surface of the reducer, thereby achieving the effect of the traditional pressure block 11 being made into a 28° inclined surface. During disassembly, the pressure block 11 can be easily removed after removing the fixing nut; the traction motor 2 adopts a dual suspension scheme, with each motor connected to the frame by two suspension cylinders to achieve independent suspension. Independent suspension has better ride comfort and less impact on the frame than non-independent suspension.

Claims

1. An articulated electric drive dump truck wheel assembly, comprising a wheel-side reducer, a traction motor, a brake, and a wheel rim mounted on the wheel-side reducer, characterized in that: The wheel-side reducer is located on the outside of the traction motor, and the brake is located on the inside of the traction motor. The wheel-side reducer, traction motor, and brake are connected by a spline. The wheel-side reducer includes an input end, an output end, and a transmission mechanism located between the input end and the output end. The wheel rim is located on the output end, and the wheel rim is connected to the output end by a pressure block. The end face of the wheel rim has a pressing plane, and the end face of the output end of the wheel-side reducer has a 28° pressing slope. The pressure block is bolted to the output end, and the pressure block is pressed against the pressing plane and the pressing slope respectively. Mounting seats are provided on both sides of the outer wall of the traction motor. The mounting base is welded to the outer wall of the traction motor. The top of the mounting base is provided with a first hinge seat, the bottom of the mounting base is provided with a second hinge seat, and the side of the mounting base is provided with a third hinge seat. A first tie rod is provided at the first hinge seat, a second tie rod is provided at the second hinge seat, and a suspension cylinder is provided at the third hinge seat. A connecting rod is provided between the two first tie rods to form an H tie rod, and the two second tie rods are distributed in a figure-eight shape. The brake includes a brake disc, friction pads, a piston, and a spring. The brake disc is directly connected to the main shaft of the traction motor through a spline. When braking is required, the pressure oil in the brake piston oil ring is released, and the piston pushes the friction pads against the brake disc under the pressure of the spring.

2. The articulated electric drive dump truck wheel assembly according to claim 1, characterized in that: The transmission mechanism of the wheel-side reducer uses a two-stage planetary gear.

3. The articulated electric drive dump truck wheel assembly according to claim 1, characterized in that: The bolt is provided with a nut for tightening the pressure block, the pressure block is provided with an arc-shaped groove, and the nut is provided with an arc-shaped protrusion corresponding to the arc-shaped groove.

4. The articulated electric drive dump truck wheel assembly according to claim 1, characterized in that: The traction motor's output cable is located at the top of the housing between the two first hinge seats.

5. The articulated electric drive dump truck wheel assembly according to claim 1, characterized in that: The mounting base includes a mounting block welded to the housing of the traction motor. The mounting block has a top surface, a side surface, and a bottom surface. The top surface of the mounting block is provided with a top plate, which is connected to the mounting block by bolts. A first hinge seat is provided on the top plate. The bottom surface of the mounting block is provided with a bottom plate, which is connected to the mounting block by bolts. A second hinge seat is provided on the bottom plate. The side surface of the mounting block is provided with a side plate, which is connected to the mounting block by bolts. A third hinge seat is provided on the side plate.

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