Hinged type electric transmission dumper wheel assembly

Abstract

A hinged type electric transmission dumper wheel assembly comprises a hub reduction gear, a traction motor, a brake and a rim arranged on the hub reduction gear, the hub reduction gear is arranged on the outer side of the traction motor, the brake is arranged on the inner side of the traction motor, and the hub reduction gear, the traction motor and the brake are connected through splines; the rim is arranged on the output end, the rim is connected with the output end through a pressing block, the end face of the rim is provided with an extrusion plane, the end face of the output end of the hub reduction gear is provided with a 28-degree extrusion inclined plane, the pressing block is locked on the output end through a bolt, and the pressing block is pressed on the extrusion plane and the extrusion inclined plane respectively. The transmission mechanism is high in transmission efficiency and good in universality.

Description

Technical Field

[0001] The invention relates to the technical field of dump trucks, in particular to an articulated electric drive dump truck wheel assembly. Background Art

[0002] The wheel assembly of a dump truck is mainly composed of tires, rims, wheel-side reducers, traction motors, brakes and their accessories. Usually, as a complete assembly, it is assembled under the vehicle using a modular design method and then hoisted onto the vehicle. At present, articulated dump trucks on the market are usually mechanical transmission structures. Although they also adopt a three-axle structure, the power is centralized, and the engine is the only power source. The mechanical energy is distributed to the front, middle and rear axles through the gearbox and transfer case to drive the vehicle forward or backward. At present, mechanical transmission articulated dump trucks usually use three different forged axles as driving components. The axle design is complex, the three axles cannot be universal, and the wheel assembly cannot be universal, and the transmission efficiency is low. Therefore, it is necessary to design a wheel assembly that can be universal for the front, middle and rear axles. At the same time, the wheel-side motor drive method is adopted to remove the drive shaft transfer case, etc., which can greatly improve the 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] In order to solve the above 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 rim arranged on the wheel-side reducer, the wheel-side reducer is arranged on the outside of the traction motor, the brake is arranged on the inside of the traction motor, and the wheel-side reducer, the traction motor and the brake are connected by splines; the wheel-side reducer includes an input end, an output end and a transmission mechanism arranged between the input end and the output end, the rim is arranged on the output end, the rim and the output end are connected by a pressure block, the end face of the rim is provided with an extrusion plane, the end face of the output end of the wheel-side reducer is provided with a 28° extrusion slope, the pressure block is locked on the output end by bolts, and the pressure blocks are respectively Pressed on the extrusion plane and the extrusion inclined surface; 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, a first hinge seat is provided on the top of the mounting seat, a second hinge seat is provided on the bottom of the mounting seat, a third hinge seat is provided on the side of the mounting seat, a first pull rod is provided at the first hinge seat, a second pull rod is provided at the second hinge seat, a suspension cylinder is provided at the third hinge seat, a connecting rod is provided between the two first pull rods to form an H pull rod, and the two second pull rods are distributed in an eight-shaped shape; the brake includes a brake disc, a friction plate, a piston and a spring, the brake disc is directly connected to the main shaft of the traction motor through a spline, and when braking is required, the pressure oil in the brake piston oil ring is released, and the piston pushes the friction plate toward the brake disc under the pressure of the spring. The principle of the present invention is as follows: the wheel-side reducer, the traction motor and the brake are connected by splines, so the transmission efficiency is higher; the wheel pressure block adopts a straight-face structure, and the reducer end face is made into a 28° inclined surface structure. The pressure block uses the positive pressure of bolts and nuts to only stick the rim to the 28° inclined surface of the reducer, thereby achieving the effect of the traditional pressure block made into a 28° inclined surface. When disassembling, the pressure block can be easily removed after only removing the fixing nut; the traction motor adopts a double suspension solution, and each motor is connected to the frame by two suspension cylinders to realize independent suspension. The independent suspension has better smoothness than the non-independent suspension and has less impact on the frame.

[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 pressing the pressing block, the pressing 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 outgoing line of the traction motor is arranged at the top of the housing between the two first hinged seats.

[0008] As an improvement, the mounting seat includes a mounting block welded to the traction motor housing, the mounting block having a top surface, side surfaces and a bottom surface, the top surface of the mounting block is provided with a top plate, the top plate and the mounting block are connected by bolts, a first articulated seat is provided on the top plate, the bottom surface of the mounting block is provided with a bottom plate, the bottom plate and the mounting block are connected by bolts, a second articulated seat is provided on the bottom plate, the side surfaces of the mounting block are provided with side plates, the side plates and the mounting block are connected by bolts, and a third articulated seat is provided on the side plates.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The wheel-side reducer, traction motor and brake are connected by splines, which improves the transmission efficiency. The wheel pressure block adopts a straight-face structure, and the reducer end face is made into a 28° inclined surface structure. The pressure block uses the positive pressure of bolts and nuts to stick the rim only to the 28° inclined surface of the reducer, thereby achieving the effect of a traditional pressure block with a 28° inclined surface. When disassembling, you only need to remove the fixing nut to easily remove the pressure block. The traction motor adopts a double suspension solution. Each motor is connected to the frame by two suspension cylinders to achieve independent suspension. Independent suspension has better smoothness than non-independent suspension and less impact on the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram of the wheel assembly I.

[0011] Figure 2 This is the wheel assembly schematic diagram II.

[0012] Figure 3 Schematic diagram of the connection between the wheel assembly and the frame.

[0013] Figure 4 This is a schematic diagram of the coordination between the wheel rim and the wheel-end reducer.

[0014] Figure 5 This is a cross-sectional view of the wheel reducer.

[0015] Figure 6 This is a cross-sectional view of the brake. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] 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 rim 16 arranged on the wheel-side reducer 1; the wheel-side reducer 1 is arranged on the outside of the traction motor 2, and the brake 3 is arranged on the inside of the traction motor 2. The wheel-side reducer 1, the traction motor 2 and the brake 3 are connected by splines, and the transmission efficiency is higher.

[0018] 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 arranged between the input end 19 and the output end 17. The transmission mechanism 18 of the wheel-side reducer 1 adopts a two-stage planetary gear, which can achieve a larger reduction ratio with a smaller size. The reducer diameter is about 636mm, the reduction ratio can reach 28.8, and the transmission efficiency reaches 96%. The rim 16 is arranged on the output end 17, and the rim 16 and the output end 17 are connected by a pressure block 11. The end face of the rim 16 is provided with an extrusion plane, and the end face of the output end 17 of the wheel-side reducer 1 is provided with an extrusion slope of 28°. The pressure block 11 is locked on the output end 17 by a bolt 14, and the pressure block 11 is respectively pressed on the extrusion plane and the extrusion slope. The bolt 14 is provided with a nut 15 for pressing the pressure block 11, and the pressure block 11 is provided with an arc groove, and the nut is provided with an arc protrusion corresponding to the arc groove. The wheel pressure block 11 adopts a straight face structure, and the end face of the reducer is made into a 28° inclined surface structure. The pressure block 11 uses the positive pressure of the bolts and nuts to stick the rim 16 only to the 28° inclined surface of the reducer, thereby achieving the effect of the traditional pressure block 11 made into a 28° inclined surface. When disassembling, the pressure block 11 can be easily removed by removing the fixing nut.

[0019] like Figures 2 to 3 As shown, mounting seats 4 are provided on both sides of the outer wall of the traction motor 2, and the mounting seats 4 are welded to the outer wall of the traction motor 2. A first hinge seat 5 is provided on the top of the mounting seat 4, a second hinge seat 6 is provided on the bottom of the mounting seat 4, and a third hinge seat 7 is provided on the side of the mounting seat 4. A first tie rod 8 is provided at the first hinge seat 5, and the first tie rod 8 is a transverse tie rod. A second tie rod 10 is provided at the second hinge seat 6, and the second tie rod 10 is an oblique tie rod. A suspension cylinder 13 is provided at the third hinge seat 7, and a connecting rod 9 is provided between the two first tie rods 8 to form an H tie rod, and the two second tie rods 10 are distributed in an eight-shaped shape. The mounting seat 4 comprises a mounting block welded on the housing of the traction motor 2, the mounting block has a top surface, a side surface and a bottom surface, a top plate 41 is provided on the top surface of the mounting block, the top plate 41 is connected to the mounting block by bolts, a first hinge seat 5 is provided on the top plate 41, a bottom plate 43 is provided on the bottom surface of the mounting block, the bottom plate 43 is connected to the mounting block by bolts, a second hinge seat 6 is provided on the bottom plate 43, a side plate 42 is provided on the side surface of the mounting block, the side plate 42 is connected to the mounting block by bolts, and a third hinge seat 7 is provided on the side plate 42. The traction motor 2 integrates the connection point between the wheel assembly and the suspension of the frame, this scheme can not only greatly save space, make full use of the external structure of the traction motor 2, and realize independent suspension arrangement in a smaller space; at the same time, the traction motor 2 adopts a double suspension support scheme, each motor is connected to the frame by two suspension cylinders, and independent suspension is realized. The independent suspension has better smoothness than the non-independent suspension and has less impact on the frame.

[0020] like Figure 6As shown, the brake 3 includes a brake disc 31, a friction plate 32, a piston and a spring 33. The brake disc 31 is directly connected to the main shaft of the traction motor 2 through a spline. When braking is required, the pressure oil in the oil ring of the brake 3 piston is released, and the piston pushes the friction plate 32 toward the brake disc 31 under the pressure of the spring 33.

[0021] The principle of the present invention is as follows: the wheel-side reducer 1, the traction motor 2 and the brake 3 are connected by splines, so that the transmission efficiency is higher; the wheel pressure block 11 adopts a straight-face structure, and the reducer end face is made into a 28° inclined surface structure. The pressure block 11 uses the positive pressure of the bolts and nuts to only stick the rim 16 to the 28° inclined surface of the reducer, thereby achieving the effect of the traditional pressure block 11 being made into a 28° inclined surface. When disassembling, the pressure block 11 can be easily removed after only removing the fixing nut; the traction motor 2 adopts a double suspension solution, and each motor is connected to the frame by two suspension cylinders to realize independent suspension. The independent suspension has better smoothness than the non-independent suspension and has less impact on the frame.

Claims

1. An articulated electric drive dump truck wheel assembly, comprising a wheel reducer, a traction motor, a brake and a wheel rim arranged on the wheel reducer, characterized in that: The wheel-side reducer is arranged on the outside of the traction motor, and the brake is arranged on the inside of the traction motor. The wheel-side reducer, the traction motor and the brake are connected by splines; the wheel-side reducer includes an input end, an output end and a transmission mechanism arranged between the input end and the output end, the rim is arranged on the output end, and the rim and the output end are connected by a pressure block, the end face of the rim is provided with an extrusion plane, the end face of the output end of the wheel-side reducer is provided with a 28° extrusion inclined surface, the pressure block is locked on the output end by bolts, and the pressure block is pressed on the extrusion plane and the extrusion inclined surface respectively; mounting seats are provided on both sides of the outer wall of the traction motor, and the The mounting seat is welded to the outer wall of the traction motor, a first hinge seat is provided on the top of the mounting seat, a second hinge seat is provided on the bottom of the mounting seat, a third hinge seat is provided on the side of the mounting seat, a first pull rod is provided at the first hinge seat, a second pull rod is provided at the second hinge seat, a suspension cylinder is provided at the third hinge seat, a connecting rod is provided between the two first pull rods to form an H pull rod, and the two second pull rods are distributed in an eight-shaped shape; the brake includes a brake disc, a friction plate, a piston and a spring, the brake disc is directly connected to the main shaft of the traction motor through a spline, and when braking is required, the pressure oil in the brake piston oil ring is released, and the piston pushes the friction plate toward 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 adopts 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 pressing the pressing block, the pressing 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 outgoing line of the traction motor is arranged 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 seat includes a mounting block welded to the traction motor housing, the mounting block having a top surface, side surfaces and a bottom surface, the top surface of the mounting block is provided with a top plate, the top plate and the mounting block are connected by bolts, a first articulated seat is provided on the top plate, the bottom surface of the mounting block is provided with a bottom plate, the bottom plate and the mounting block are connected by bolts, a second articulated seat is provided on the bottom plate, a side plate is provided on the side of the mounting block, the side plate and the mounting block are connected by bolts, and a third articulated seat is provided on the side plate.

Images