Integrated electrically-driven speed reducer of unmanned pure-electric mining wide-body dumper

Abstract

The utility model discloses an integrated electric speed reducer of an unmanned pure electric mining wide-body dumper, which comprises a steering knuckle shell, a speed reducer assembly, a motor assembly and a brake device, the motor assembly and the speed reducer assembly are sequentially arranged in the steering knuckle shell, and the motor assembly is in transmission connection with the speed reducer assembly. The braking device is arranged outside the steering knuckle shell and is in transmission connection with the motor assembly, a frame connecting part and a steering connecting part are arranged on the outer circumferential face of the side, close to the frame, of the steering knuckle shell, and the steering knuckle shell is hinged to the frame through the frame connecting part and steers through the steering connecting part. A vehicle frame connecting end and a steering arm are installed on the outer circle face, a speed reducer assembly, a motor assembly and a brake device are integrated to form a steering main body component, a traditional full-bridge structure is omitted, the steering device is used for a double-bridge four-wheel drive structure, space layout between vehicle frame beams is optimized, sufficient space is provided for a battery pack, the endurance mileage of the vehicle is increased, and the steering device is suitable for pure electric mining wide-body dump trucks of more than one hundred tons.

Description

Technical Field

[0001] The utility model relates to an integrated electric drive speed reduction device of an unmanned pure electric wide-body dump truck for mining, belonging to the technical field of engineering machinery. Background Art

[0002] In recent years, with the continuous maturity and rapid development of unmanned driving control technology, many mining companies at home and abroad have gradually applied unmanned driving technology to production sequences based on existing vehicles. Similarly, mining companies abroad are also gradually promoting and applying this technology. Although unmanned driving technology is applied to existing large-tonnage mining vehicles, the high-power engines originally configured are still a huge energy-consuming group; their diesel consumption is huge and astonishing, and the emission pollution is serious. Therefore, under the dual pressure of energy crisis and environmental pollution, coupled with the increasing attention of people to environmental protection, unmanned driving and pure electric mining vehicles completely replacing traditional mining vehicles has become the only way out for industrial development; it is also an important part of the sustainable development of mining enterprises.

[0003] The current pure electric wide-body dump trucks for mining do not have a relatively systematic electric drive axle. Most of them continue the traditional structure of rigid axles. Compared with vehicles with double rear axles or multiple bridge structures, they occupy a space layout of nearly half the length of the vehicle body. At the same time, their power system configuration only replaces the engine system with an electric motor, battery pack and related systems, retaining the gearbox and total transmission of traditional models, resulting in limited configuration capacity of the vehicle battery system, and unable to increase the battery capacity to increase the vehicle's range.

[0004] The patent with publication number CN111873791A discloses an integrated electric wheel and vehicle, in which one end of the wheel hub motor is connected to the steering knuckle support assembly through the steering knuckle, and a parking brake connected to the motor shaft is arranged between the steering knuckle and the steering knuckle support assembly; the parking brake is connected to one end of the inflation and deflation assembly, and the other end of the inflation and deflation assembly is connected to the rim assembly. The steering knuckle support assembly is arranged at one end of the wheel hub motor, which will occupy the installation space of the battery pack inside the frame and reduce the vehicle's endurance. The parking brake is arranged between the steering knuckle and the steering knuckle support assembly, and the applicable brake type range is limited, and the braking effect and safety are poor. Summary of the invention

[0005] Purpose of the invention: In view of the deficiencies in the prior art, the utility model provides an integrated electric drive reduction device for an unmanned pure electric wide-body mining dump truck. The utility model integrates a reducer assembly, a motor assembly, and a braking device, and arranges a frame connection and a steering connection on the outer circumference of the steering knuckle housing, thereby providing sufficient space for configuring a large-capacity battery pack. The utility model is suitable for pure electric wide-body mining dump trucks weighing more than 100 tons.

[0006] Technical solution: An integrated electric drive reduction device for an unmanned pure electric wide-body mining dump truck, comprising a steering knuckle housing, a reducer assembly, a motor assembly, and a braking device. The motor assembly and the reducer assembly are sequentially arranged inside the steering knuckle housing, and the motor assembly and the reducer assembly are transmission-connected. The braking device is arranged outside the steering knuckle housing, and the braking device is transmission-connected to the motor assembly. A frame connection portion and a steering connection portion are arranged on the outer circumferential surface of the steering knuckle housing close to the frame side. The steering knuckle housing is hinged to the frame through the frame connection portion, and steering is performed through the steering connection portion.

[0007] The utility model installs the frame connection end and the steering arm on the outer circumferential surface to avoid space occupation in the battery installation area inside the frame, providing convenience for battery replacement, and at the same time integrates the reducer assembly, the motor assembly, and the braking device to form the steering main body component of the unmanned pure electric mining wide-body dump truck, cancels the full-bridge structure of the traditional vehicle, and the integrated steering main body component completely assumes all the functions of the rigid bridge, so it can be used for the double-bridge four-wheel drive structure, greatly optimizes the space layout between the frame beams, provides sufficient space guarantee for the configuration of large-capacity battery packs, increases the vehicle's cruising range, and improves the transportation efficiency of the dump truck. It can be suitable for pure electric mining wide-body dump trucks with a weight of more than 100 tons.

[0008] Preferably, in order to strengthen the kingpin structure, the frame connection part is symmetrically arranged along the radial direction of the knuckle housing, a ball pin is installed at the frame connection part, and the knuckle housing is hinged to the frame through the ball pin. The ball pin strengthens the kingpin structure and makes the vehicle steering operation easier and the road sense clearer. The frame of the utility model adopts a double wishbone structure and is hinged to the ball pin. The double wishbone structure provides excellent lateral stiffness and can absorb the lateral force on the tire at the same time. Due to its large lateral stiffness, the roll is small when turning, which can improve the handling and stability of the vehicle.

[0009] Preferably, in order to save the battery installation area, the steering connection part is arranged along the outer side of the corresponding installation axle, and a steering linkage mechanism is installed at the steering connection part. One end of the steering linkage mechanism is connected to the steering knuckle housing through the steering connection part, and the other end is hinged to the outer side of the frame. The steering knuckle housing is steered through the steering linkage mechanism. The steering linkage mechanism is installed on the outer side of the frame through the steering connection part to avoid occupying the battery installation area inside the frame.

[0010] Preferably, in order to improve the braking effect, a brake mounting disc is provided at one end of the knuckle housing close to the frame, and at least one set of the brake device is provided, and is detachably connected to the brake mounting disc. The brake device in the utility model includes a working brake caliper and a parking brake caliper. By providing a brake mounting disc, three to four sets of working brake calipers and one set of parking brake calipers can be externally installed, which can not only combine and match different brake devices, but also be externally installed for easy maintenance and installation.

[0011] Preferably, in order to provide a larger speed ratio and torque for the whole vehicle, the reducer assembly includes a secondary planetary reduction mechanism, a primary planetary reduction mechanism, and a transmission shaft, wherein the secondary planetary reduction mechanism and the primary planetary reduction mechanism are sequentially installed in series on the transmission shaft, and the transmission shaft is connected to the output end of the motor assembly. The two-stage reduction completely replaces the functions of the original main reducer and wheel-side reducer, and can expand and extend the reduction mechanism with a variety of reduction ratio structures according to needs to match unmanned pure electric mining dump trucks with different traction performance requirements. At the same time, the two-stage series mode is adopted to provide the system with a larger speed ratio and realize large torque transmission.

[0012] Preferably, in order to improve transmission stability, the secondary planetary reduction mechanism includes a secondary sun gear connected to the transmission shaft, a secondary planetary gear meshed with the secondary sun gear, a secondary planetary gear shaft, and a secondary ring gear, wherein the secondary planetary gear is connected to the secondary planetary gear shaft, and the secondary ring gear is meshed with the secondary planetary gear. The power transmission path of the secondary planetary reduction mechanism is the output power of the motor assembly-secondary sun gear-secondary planetary gear-secondary ring gear.

[0013] Preferably, in order to improve the transmission stability, the primary planetary reduction mechanism includes a primary sun gear connected to the transmission shaft, a primary planetary gear meshed with the primary sun gear, a primary planetary gear shaft, and a primary ring gear, wherein the primary planetary gear is connected to the primary planetary gear shaft, and the primary ring gear is meshed with the primary planetary gear. The power transmission path of the primary planetary reduction mechanism is the output power of the motor assembly-secondary sun gear-transmission shaft-primary sun gear-primary planetary gear-primary ring gear, and the secondary planetary reduction mechanism and the primary planetary reduction mechanism simultaneously drive the wheels to rotate, providing a larger speed ratio and torque.

[0014] Preferably, in order to protect the motor circuit and cooling water channel, the motor assembly includes a motor, a motor junction box, a motor cooling water channel, and a cooling water inlet, a cooling water outlet, and a motor cable outlet arranged on the steering knuckle housing. The motor cooling water channel passes through the cooling water inlet and the cooling water outlet respectively, and the cable of the motor junction box is arranged at the motor cable outlet. The motor circuit and cooling water channel are led out from the housing and clamped by a rubber plug and embedded in the steering knuckle housing to avoid wear and seal.

[0015] Preferably, in order to improve the connection stability, a flange is installed at the output end of the motor, and the output shaft of the motor is connected to the transmission shaft through the flange.

[0016] Preferably, in order to make the integrated steering knuckle suitable for pure electric mining dump trucks with a tonnage of more than 100 tons, it also includes a wheel hub connected to the reducer assembly and a rim connected to the wheel hub, wherein the rim is a five-piece flange-type heavy-duty rim.

[0017] Beneficial effects: The utility model integrates a reducer assembly, a motor assembly, and a braking device to form the steering main body component of an unmanned pure electric wide-body mining dump truck, canceling the full-bridge structure of traditional vehicles. The integrated steering main body component fully assumes all the functions of the rigid bridge, and can therefore be used for a double-bridge four-wheel drive structure. At the same time, the steering linkage mechanism is installed on the outside of the frame through the steering connection part, which greatly optimizes the spatial layout between the frame beams and provides sufficient space for the configuration of a large-capacity battery pack, thereby increasing the vehicle's cruising range and improving the transportation efficiency of the dump truck. A double-wishbone structure is also used to articulate the ball pin to improve the vehicle's handling and stability, and different braking devices can also be combined to achieve a stronger braking effect. The two-stage reduction mechanism series mode provides the system with a larger speed ratio, achieves large torque transmission, and can be suitable for pure electric wide-body mining dump trucks of more than 100 tons. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 It is the overall structure diagram of the utility model;

[0020] Figure 2 It is an internal cross-sectional view of the utility model;

[0021] Figure 3 This is a structural diagram of the steering knuckle housing of the utility model;

[0022] Figure 4 This is a schematic diagram of the installation position of the integrated steering knuckle of the utility model in the vehicle frame. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] like Figure 1-Figure 4 As shown, an integrated electric drive reduction device of an unmanned pure electric wide-body dump truck for mining includes a steering knuckle housing 1, a reducer assembly 2, a motor assembly 3, and a brake device 9. The motor assembly 3 and the reducer assembly 2 are sequentially arranged inside the steering knuckle housing 1, and the motor assembly 3 and the reducer assembly 2 are transmission-connected. The brake device 9 is arranged outside the steering knuckle housing 1, and the brake device 9 is transmission-connected to the motor assembly 3. A frame connection part 4 and a steering connection part 5 are arranged on the outer circumferential surface of the steering knuckle housing 1 close to the frame side. The steering knuckle housing 1 is hinged to the frame through the frame connection part 4, and steers through the steering connection part 5.

[0027] By installing the frame connection end and the steering arm on the outer circumferential surface, the space occupation of the battery installation area inside the frame is avoided, which provides convenience for battery replacement. At the same time, the reducer assembly 2, the motor assembly 3, and the braking device 9 are integrated to form the steering main body component of the unmanned pure electric mining wide-body dump truck, eliminating the full-bridge structure of the traditional vehicle. The integrated steering main body component completely assumes all the functions of the rigid bridge, and can therefore be used for the double-bridge four-wheel drive structure. The space layout between the frame beams is greatly optimized, and sufficient space is provided for the configuration of large-capacity battery packs, which increases the vehicle's cruising range and improves the transportation efficiency of the dump truck. It can be suitable for pure electric mining wide-body dump trucks with a weight of more than 100 tons.

[0028] In order to strengthen the kingpin structure, the frame connection part 4 is symmetrically arranged along the radial direction of the steering knuckle housing 1, and a ball pin 41 is installed at the frame connection part 4, and the steering knuckle housing 1 is hinged to the frame through the ball pin 41. The ball pin 41 strengthens the kingpin structure and makes the vehicle steering operation easier and the road sense clearer. The frame of the utility model adopts a double wishbone structure and is hinged to the ball pin 41. The double wishbone structure provides excellent lateral rigidity and can absorb the lateral force on the tire at the same time. Due to its large lateral rigidity, the roll is small when turning, which can improve the controllability and stability of the vehicle.

[0029] In order to save the battery installation area, the steering connection part 5 is arranged along the outer side of the corresponding installation axle, and a steering linkage mechanism is installed at the steering connection part 5. One end of the steering linkage mechanism is connected to the steering knuckle housing 1 through the steering connection part 5, and the other end is hinged to the outer side of the frame. The steering knuckle housing 1 is steered through the steering linkage mechanism. The steering linkage mechanism is installed on the outer side of the frame through the steering connection part 5 to avoid occupying the battery installation area inside the frame.

[0030] In order to improve the braking effect, a brake mounting disc 6 is provided at one end of the steering knuckle housing 1 close to the vehicle frame, and at least one set of the brake device 9 is provided and detachably connected to the brake mounting disc 6. The brake device 9 in the utility model includes a working brake caliper and a parking brake caliper. By providing the brake mounting disc 6, three to four sets of working brake calipers and one set of parking brake calipers can be externally installed, which can not only combine and match different brake devices 9, but also be externally installed for easy maintenance and installation.

[0031] In order to provide a larger speed ratio and torque for the whole vehicle, the reducer assembly 2 includes a secondary planetary reduction mechanism 21, a primary planetary reduction mechanism 22, and a transmission shaft 23. The secondary planetary reduction mechanism 21 and the primary planetary reduction mechanism 22 are sequentially mounted in series on the transmission shaft 23, and the transmission shaft 23 is connected to the output end of the motor assembly 3. The two-stage reduction completely replaces the functions of the original main reducer and wheel-side reducer, and can expand and extend the reduction mechanism with a variety of reduction ratio structures according to needs to match unmanned pure electric mining dump trucks with different traction performance requirements. At the same time, the two-stage series mode is adopted to provide a larger speed ratio for the system to achieve large torque transmission.

[0032] In order to improve the transmission stability, the secondary planetary reduction mechanism 21 includes a secondary sun gear 211 connected to the transmission shaft 23, a secondary planetary gear 212 meshing with the secondary sun gear 211, a secondary planetary gear shaft 213, and a secondary ring gear 214. The secondary planetary gear 212 is connected to the secondary planetary gear shaft 213, and the secondary ring gear 214 is meshed and connected with the secondary planetary gear 212. The power transmission path of the secondary planetary reduction mechanism 21 is the output power of the motor assembly 3-secondary sun gear 211-secondary planetary gear 212-secondary ring gear 214.

[0033] In order to improve the transmission stability, the primary planetary reduction mechanism 22 includes a primary sun gear 221 connected to the transmission shaft 23, a primary planetary gear 222 meshing with the primary sun gear 221, a primary planetary gear shaft 223, and a primary ring gear 224. The primary planetary gear 222 is connected to the primary planetary gear shaft 223, and the primary ring gear 224 is meshed and connected with the primary planetary gear 222. The power transmission path of the primary planetary reduction mechanism 22 is the output power of the motor assembly 3-secondary sun gear 211-transmission shaft 23-primary sun gear 221-primary planetary gear 222-primary ring gear 224. The secondary planetary reduction mechanism 21 and the primary planetary reduction mechanism 22 simultaneously drive the wheels to rotate, providing a larger speed ratio and torque.

[0034] In order to protect the circuit and cooling water path of the motor 31, the motor assembly 3 includes the motor 31, the motor junction box 32, the motor cooling water channel 33, and the cooling water inlet 34, the cooling water outlet 35, and the motor cable outlet 36 arranged on the steering knuckle housing 1. The motor cooling water channel 33 passes through the cooling water inlet 34 and the cooling water outlet 35 respectively, and the cable of the motor junction box 32 is arranged at the motor cable outlet 36. The circuit and cooling water path of the motor 31 are led out from the housing and clamped by a rubber plug and embedded in the steering knuckle housing 1, which plays a role in avoiding wear and sealing.

[0035] In order to improve the connection stability, a flange 37 is installed at the output end of the motor 31 , and the output shaft of the motor 31 is connected to the transmission shaft 23 through the flange 37 .

[0036] In order to make the integrated steering knuckle suitable for pure electric mining dump trucks with a weight of more than 100 tons, it also includes a wheel hub 7 connected to the reducer assembly 2 and a rim 8 connected to the wheel hub 7. The rim 8 is a five-piece flange-type heavy-duty rim.

[0037] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated electric drive reduction device for an unmanned pure electric wide-body dump truck for mining, comprising a steering knuckle housing (1), a reduction gear assembly (2), a motor assembly (3), and a brake device (9), wherein the motor assembly (3) and the reduction gear assembly (2) are sequentially arranged inside the steering knuckle housing (1), the motor assembly (3) and the reduction gear assembly (2) are drivingly connected, and the brake device (9) is arranged outside the steering knuckle housing (1), and the brake device (9) is drivingly connected to the motor assembly (3), characterized in that: A frame connection portion (4) and a steering connection portion (5) are provided on the outer circumferential surface of the steering knuckle housing (1) on the side close to the vehicle frame; the steering knuckle housing (1) is hinged to the vehicle frame via the frame connection portion (4) and is steered via the steering connection portion (5).

2. The integrated electric drive reduction device of the unmanned pure electric wide-body mining dump truck according to claim 1 is characterized in that: The frame connection portion (4) is symmetrically arranged along the radial direction of the steering knuckle housing (1); a ball pin (41) is installed at the frame connection portion (4); and the steering knuckle housing (1) is hinged to the frame via the ball pin (41).

3. The integrated electric drive reduction device of the unmanned pure electric wide-body mining dump truck according to claim 1 is characterized in that: The steering connection part (5) is arranged along the outer side of the corresponding mounting axle, and a steering linkage mechanism is installed at the steering connection part (5). One end of the steering linkage mechanism is connected to the steering knuckle housing (1) through the steering connection part (5), and the other end is hinged to the outer side of the frame. The steering knuckle housing (1) is steered through the steering linkage mechanism.

4. The integrated electric drive reduction device of the unmanned pure electric wide-body mining dump truck according to claim 1 is characterized in that: A brake mounting disc (6) is provided at one end of the steering knuckle housing (1) close to the vehicle frame, and at least one set of the brake device (9) is provided and is detachably connected to the brake mounting disc (6).

5. The integrated electric drive reduction device of the unmanned pure electric wide-body mining dump truck according to claim 1 is characterized in that: The reducer assembly (2) comprises a secondary planetary reduction mechanism (21), a primary planetary reduction mechanism (22), and a transmission shaft (23); the secondary planetary reduction mechanism (21) and the primary planetary reduction mechanism (22) are sequentially mounted in series on the transmission shaft (23); and the transmission shaft (23) is connected to an output end of the motor assembly (3).

6. The integrated electric drive reduction device of the unmanned pure electric wide-body mining dump truck according to claim 5 is characterized in that: The secondary planetary reduction mechanism (21) comprises a secondary sun gear (211) connected to a transmission shaft (23), a secondary planetary gear (212) meshing with the secondary sun gear (211), a secondary planetary gear shaft (213), and a secondary ring gear (214); the secondary planetary gear (212) is connected to the secondary planetary gear shaft (213), and the secondary ring gear (214) is meshingly connected to the secondary planetary gear (212).

7. The integrated electric drive reduction device of the unmanned pure electric wide-body mining dump truck according to claim 6 is characterized in that: The primary planetary reduction mechanism (22) comprises a primary sun gear (221) connected to a transmission shaft (23), a primary planetary gear (222) meshing with the primary sun gear (221), a primary planetary gear shaft (223), and a primary ring gear (224); the primary planetary gear (222) is connected to the primary planetary gear shaft (223), and the primary ring gear (224) is meshingly connected to the primary planetary gear (222).

8. The integrated electric drive reduction device of the unmanned pure electric wide-body mining dump truck according to claim 7 is characterized in that: The motor assembly (3) comprises a motor (31), a motor junction box (32), a motor cooling water channel (33), and a cooling water inlet (34), a cooling water outlet (35), and a motor cable outlet (36) arranged on the steering knuckle housing (1); the motor cooling water channel (33) passes through the cooling water inlet (34) and the cooling water outlet (35), respectively; and the cable of the motor junction box (32) is arranged at the motor cable outlet (36).

9. The integrated electric drive reduction device of the unmanned pure electric wide-body dump truck for mining according to claim 8 is characterized in that: The output end of the motor (31) is provided with a flange (37), and the output shaft of the motor (31) is connected to the transmission shaft (23) via the flange (37).

10. The integrated electric drive reduction device of the unmanned pure electric wide-body mining dump truck according to claim 1 is characterized in that: It also comprises a wheel hub (7) connected to the reducer assembly (2) and a wheel rim (8) connected to the wheel hub (7); the wheel rim (8) is a five-piece flange-type heavy-duty wheel rim.

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