Power unit with bearing and steering functions and new energy heavy dump truck

Abstract

The embodiment of the application discloses a power unit with bearing and steering functions, which comprises a support, an electric drive assembly, a drive axle, a subframe, a rotary support and an oil cylinder. When the power unit is applied to a dump truck, the rotary support is used to be connected to a whole vehicle support of the dump truck, the drive axle obtains power through the electric drive assembly, and the support for fixing the drive axle is hinged with the subframe. Based on this, through the arrangement of the support and the rotary support, the whole vehicle support of the dump truck and the drive axle can have a rotatable and swingable connection relationship. In the working process of the dump truck, the rotation of the rotary support can drive the subframe and the front vehicle part to produce a rotation angle, and the subframe can form a certain angle with the whole vehicle frame. In this way, the lateral force generated by the friction between the front vehicle wheel and the ground can provide sufficient steering force for the whole vehicle, improve the steering flexibility of the whole vehicle, and reduce the power demand of the electric drive assembly.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of dump trucks, in particular to a power unit with bearing and steering functions and a new energy heavy dump truck. BACKGROUND

[0002] Under the background of national low-carbon environmental protection development, the power of heavy-duty dump trucks is gradually switched from the original fuel engine to new energy power. Heavy-duty dump trucks with pure electric drive combined with battery swap technology have begun to enter the market. Heavy-duty dump trucks have large gross vehicle weight (GVW), frequent climbing and braking, and high power requirements. The central drive type heavy-duty dump truck is arranged with one drive motor. The power depends on the power of the drive motor, but the current market mature drive motor power is low and cannot meet the power requirements of the whole vehicle.

[0003] The development trend of off-road wide-body dump trucks is obvious, and the use of traditional balance axle suspension structure will increase the load of single axle. Due to the limitation of domestic drive axle and leaf spring suspension matching resources, the gross vehicle weight (GVW) of off-road wide-body dump trucks is lower than that of imported rigid dump trucks, and cannot be expanded in size. SUMMARY

[0004] The present application aims to at least solve one of the problems in the prior art or related art.

[0005] To this end, the first aspect of the present application provides a.

[0006] The second aspect of the present application provides a.

[0007] The third aspect of the present application provides a.

[0008] Therefore, according to the first aspect of the present application, a power unit with bearing and steering functions is provided, comprising:

[0009] A support;

[0010] An electric drive assembly arranged on the support;

[0011] A drive axle arranged on the support, and the output end of the electric drive assembly is connected to the drive axle;

[0012] A subframe, one end of the subframe is hinged to the support;

[0013] A rotary support arranged on the subframe and used for connecting to the whole vehicle frame of the dump truck;

[0014] A hydraulic cylinder, one end of the hydraulic cylinder is hinged to the support, and the other end is hinged to the subframe or the rotary support.

[0015] In an embodiment, the electric drive assembly comprises:

[0016] a drive motor;

[0017] a gearbox, an output end of the drive motor being connected to the gearbox;

[0018] a transmission shaft, the transmission shaft being connected to an output end of the gearbox, the transmission shaft being connected to the drive axle.

[0019] In an embodiment, the power unit with load-carrying and steering functions further comprises:

[0020] a connecting bracket, the connecting bracket being arranged on the bracket;

[0021] a first shaft pin, the first shaft pin passing through the connecting bracket and one end of the oil cylinder;

[0022] a second shaft pin, the second shaft pin passing through one of the subframe and the slewing support, and the other end of the oil cylinder.

[0023] In an embodiment, the oil cylinder is two, the two oil cylinders being located on two sides of the bracket.

[0024] In an embodiment, the power unit with load-carrying and steering functions further comprises:

[0025] a third shaft pin, the third shaft pin passing through the subframe and the bracket.

[0026] In an embodiment, the bracket is in a herringbone shape.

[0027] According to a second aspect of the embodiments of the present application, a new energy heavy-duty self-unloading truck is provided, comprising:

[0028] the power unit according to any of the technical solutions described above.

[0029] In an embodiment, the new energy heavy-duty self-unloading truck further comprises:

[0030] a whole vehicle frame, the whole vehicle frame being connected to the slewing support.

[0031] Compared with the prior art, the power unit with bearing and steering functions provided by the embodiment of the application comprises a support, an electric drive assembly, a drive axle, a subframe, a rotary support and an oil cylinder. When the power unit is applied to a dump truck, the rotary support is used for being connected to a vehicle support of the dump truck, the drive axle obtains power through the electric drive assembly, and the support for fixing the drive axle is hinged to the subframe. Based on this, through the arrangement of the support and the rotary support, the vehicle support of the dump truck and the drive axle can have a rotatable and swingable connection relationship. During the working process of the dump truck, the rotation of the rotary support can drive the subframe and the front vehicle part to have a rotation angle, and the subframe can form a certain angle with the vehicle frame. In this way, the lateral force generated by the friction between the front vehicle wheel and the ground can provide sufficient steering force for the vehicle, so that the steering action of the vehicle is realized. The force of the tire under each working condition of the dump truck is transmitted to the vehicle frame, so that the bearing and driving effects are achieved. Through the arrangement of the rotary support, large-angle rotation can be realized, and the rotation center can be closer to the center of the vehicle, so that the turning radius can be effectively reduced, and the steering flexibility of the vehicle is improved. Through the arrangement of the electric drive assembly and the drive axle on the support, decentralized or power arrangement is realized, a high-power drive motor is not needed, the existing power unit parts in China can meet the matching selection of the vehicle, resources are rich, the cost of the heavy dump truck is reduced, and the drive and steering forms can be reasonably arranged according to the requirements of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the application. Moreover, the same reference numerals are used throughout the same figures. In the drawings:

[0033] Fig. 1 FIG. 1 is a schematic structural view of a power unit with bearing and steering functions according to an embodiment of the application from one angle;

[0034] Fig. 2 FIG. 2 is a schematic structural view of the power unit with bearing and steering functions according to the embodiment of the application from another angle;

[0035] Fig. 3 FIG. 3 is a schematic structural view of the power unit with bearing and steering functions according to the embodiment of the application from still another angle.

[0036] In the drawings, Figs. 1 to 3 The correspondence between the reference numerals in the drawings and the component names is as follows:

[0037] 110 bracket, 120 electric drive assembly, 130 drive axle, 140 subframe, 150 slewing support, 160 oil cylinder, 170 connecting bracket, 180 first shaft pin, 190 second shaft pin, 200 third shaft pin;

[0038] 121 drive motor, 122 gearbox, 123 transmission shaft. DETAILED DESCRIPTION

[0039] In order to better understand the above technical solutions, the technical solutions of the embodiments of the present application will be described in detail below through the drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present application and the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application. In the case of no conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0040] As shown in Figs. 1 to 3 According to the first aspect of the embodiments of the present application, a power unit with bearing and steering functions is provided, comprising: a bracket 110; an electric drive assembly 120 arranged on the bracket 110; a drive axle 130 arranged on the bracket 110, the output end of the electric drive assembly 120 being connected to the drive axle 130; a subframe 140, one end of the subframe 140 being hinged to the bracket 110; a slewing support 150 arranged on the subframe 140, used for being connected to the whole vehicle frame of the dump truck; an oil cylinder 160, one end of the oil cylinder 160 being hinged to the bracket 110, the other end being hinged to the subframe 140 or the slewing support 150.

[0041] The power unit with bearing and steering functions provided by the embodiment of the application comprises a support 110, an electric drive assembly 120, a drive axle 130, a subframe 140, a rotary support 150 and an oil cylinder 160. When the power unit is applied to a dump truck, the rotary support 150 is used to be connected to the whole vehicle support 110 of the dump truck, the drive axle 130 obtains power through the electric drive assembly 120, and the support 110 for fixing the drive axle 130 is hinged to the subframe 140. Based on this, through the arrangement of the support 110 and the rotary support 150, the whole vehicle support 110 of the dump truck and the drive axle 130 can have a rotatable and swingable connection relationship. During the working process of the dump truck, the rotation of the rotary support 150 can drive the subframe 140 and the front vehicle part to have a rotation angle, and the subframe 140 can form a certain angle with the whole vehicle frame. In this way, the lateral force generated by the friction between the front vehicle wheel and the ground can provide sufficient steering force for the whole vehicle, so as to realize the steering action of the whole vehicle. The force of the tire of the dump truck in various working conditions is transmitted to the whole vehicle frame, so as to achieve the bearing and driving effects. Through the arrangement of the rotary support 150, large-angle rotation can be realized, and the rotation center can be closer to the center of the whole vehicle, so as to effectively reduce the turning radius and improve the steering flexibility of the whole vehicle. Through the arrangement of the electric drive assembly 120 and the drive axle 130 on the support 110, the power distribution is realized, and a high-power drive motor 121 is not needed. The existing power unit parts in China can meet the matching selection of the whole vehicle, the resources are rich, the cost of the heavy dump truck is reduced, and the drive and steering forms can be reasonably arranged according to the demand of the whole vehicle.

[0042] It can be understood that through the arrangement of the oil cylinder 160, the angle between the support 110 and the subframe 140 can be adjusted by the elongation or contraction of the oil cylinder 160, so that the power unit can be suitable for different working condition requirements.

[0043] In a possible implementation, the electric drive assembly 120 comprises a drive motor 121, a gearbox 122, and a transmission shaft 123. The output end of the drive motor 121 is connected to the gearbox 122, the transmission shaft 123 is connected to the output end of the gearbox 122, and the transmission shaft 123 is connected to the drive axle 130.

[0044] In the technical solution, the structure of the electric drive assembly 120 is further provided. The electric drive assembly 120 can comprise the drive motor 121, the gearbox 122 and the transmission shaft 123. The drive motor 121 and the gearbox form a power unit, which is assembled on the support 110. The transmission torque is transmitted to the drive axle 130 through the transmission shaft 123, and the drive axle 130 can provide power for the movement of the dump truck.

[0045] In an implementation, the power unit with the functions of bearing and steering further comprises a connecting bracket 170 arranged on the bracket 110, a first shaft pin 180 penetrating through the connecting bracket 170 and one end of the oil cylinder 160, and a second shaft pin 190 penetrating through one of the sub-frame 140 and the rotary support 150 and the other end of the oil cylinder 160.

[0046] In the technical solution, the power unit further comprises the connecting bracket 170, the first shaft pin 180 and the second shaft pin 190. The arrangement of the connecting bracket 170 facilitates adjustment of the fixed position of the oil cylinder 160. The arrangement of the first shaft pin 180 and the second shaft pin 190 facilitates fixation of the oil cylinder 160, and meanwhile, the oil cylinder 160 can have a degree of freedom with the bracket 110 and the sub-frame 140, so as to facilitate adjustment of the angle between the bracket 110 and the sub-frame 140 by the oil cylinder 160.

[0047] In an implementation, the oil cylinder 160 is two, and the two oil cylinders 160 are located on two sides of the bracket 110.

[0048] In the technical solution, the number of the oil cylinders 160 is further provided, and the oil cylinders 160 are two, so that the adjustment force of the sub-frame 140 is stronger, and the work of the power unit is more stable.

[0049] In an implementation, the power unit with the functions of bearing and steering further comprises a third shaft pin 200 penetrating through the sub-frame 140 and the bracket 110.

[0050] In the technical solution, the power unit further comprises the third shaft pin 200, and the arrangement of the third shaft pin 200 facilitates hinging of the bracket 110 and the sub-frame 140.

[0051] In an implementation, the bracket 110 is in a herringbone shape.

[0052] In the technical solution, the shape of the bracket 110 is further provided, and the bracket 110 can be a herringbone bracket, facilitating installation and fixation of the electric drive assembly 120.

[0053] According to a second aspect of the embodiments of the present application, a new energy heavy dump truck is provided, comprising the power unit according to any one of the above technical solutions.

[0054] The new energy heavy dump truck provided by the embodiments of the present application comprises the power unit according to any one of the above technical solutions, and therefore has all the beneficial effects of the power unit according to any one of the above technical solutions, which will not be described herein.

[0055] In an implementation, the new energy heavy dump truck further comprises a whole vehicle frame connected to the rotary support 150.

[0056] The new energy heavy-duty dump truck provided by the embodiment of the application can drive the sub-frame 140 and the front vehicle part to rotate through the rotation of the rotary support 150 during the operation of the dump truck, and the sub-frame 140 can form a certain angle with the whole vehicle frame, so that the lateral force generated by the friction between the front vehicle wheel and the ground can provide sufficient steering force for the whole vehicle, and the steering action of the whole vehicle is realized. The force of the tire in each working condition of the dump truck is transmitted to the whole vehicle frame, and the load bearing and driving effects are achieved. Through the arrangement of the rotary support 150, large-angle rotation can be realized, and the rotation center can be closer to the center of the whole vehicle, so that the turning radius can be effectively reduced, and the steering flexibility of the whole vehicle can be improved.

[0057] It can be understood that the new energy heavy-duty dump truck can be a hybrid vehicle, that is, the new energy heavy-duty dump truck can also include other power sources and other drive axles, and the other drive axles can be arranged on the whole vehicle frame, based on which the distributed layout of the power sources can be further realized, and the power demand of the new energy heavy-duty dump truck on the electric drive assembly 120 can be reduced.

[0058] Embodiment

[0059] The embodiment of the application provides a power unit with load bearing and steering functions, which comprises a driving motor 121, a gearbox 122, a drive axle 130, an oil cylinder 160 and a sub-frame 140, and forms a new energy power unit with load bearing and steering functions. The drive axle 130 is hinged to the sub-frame 140 through the bracket 110 and the oil cylinder 160; the power unit composed of the driving motor 121 and the gearbox 122 or a single motor is installed on the bracket 110, and transmits torque to the drive axle 130 through a transmission shaft 123.

[0060] The power unit is hinged to the whole vehicle frame of the vehicle through the rotary support on the sub-frame 140, and the force of the tire in each working condition is transmitted to the frame, so that the load bearing and driving effects are achieved, and the new energy power unit can rotate around the hinge axis to realize the steering function. Based on this, the embodiment of the application can arrange different drive forms and steering forms according to actual needs. For example, the first and second roots use the power unit, the third and fourth roots use the through double wheel edge reduction axle, and after combination, the 8x8 drive form and the first and second axle steering vehicle model are realized. Because the power unit function is completed and the arrangement is flexible, the development of different drive forms and steering forms such as 6x6 and 8x6 can be realized.

[0061] In summary, different numbers of power units are arranged flexibly according to the load bearing and power requirements of the whole vehicle. The distributed arrangement solves the problems of insufficient power and scarcity of large load bearing parts of the heavy-duty dump truck.

[0062] For example, Fig. 1 andFig. 2 As shown, the driving motor 121 and the gearbox 122 constitute a power unit, which is assembled on the human-shaped support 110, and the driving torque is transmitted to the driving axle 130 through the transmission shaft 123. The human-shaped support 110 is rigidly connected with the connecting support 170 and the driving axle 130. A rotary support is installed above the entire new energy power unit, and the inner ring and the outer ring of the rotary support are rigidly connected with the subframe 140 and the vehicle frame and can rotate relative to each other. The connection mode of the rotary support can not only transmit the tire reaction force and the torque to the frame, but also can realize rotation around the axis of the rotary support.

[0063] Referring to the accompanying drawings Fig. 3 One end of the human-shaped support 110 is rigidly connected with the driving axle, and the other end is hingedly connected with the subframe 140. The left oil cylinder 160 is hingedly connected with the driving axle and the subframe 140 at both ends. During the movement of the vehicle, the new energy power assembly and the axle swing around the front pin shaft.

[0064] The embodiments of the present application have at least the following technical effects:

[0065] The power arrangement is decentralized, a high-power driving motor 121 is not needed, and the existing power unit parts in China can meet the matching selection of the vehicle, resources are abundant, and the cost of the heavy dump truck is reduced.

[0066] The driving and steering forms can be reasonably arranged according to the requirements of the vehicle.

[0067] In the present application, the terms "first", "second", "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; "connection" can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0069] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "certain embodiments", and the like is intended to indicate that the described implementation, feature, structure, material or characteristic is included in at least one embodiment or example of the application. The illustrative representations of the above terms in the specification are not necessarily referring to the same embodiment or example. Moreover, the described implementation, feature, structure, material or characteristic can be combined in any one or more embodiments or examples in a suitable manner.

[0070] The above only is the preferred embodiment of the present application, and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power unit having a load carrying and steering function, characterized in that, Comprising: a bracket; an electric drive assembly arranged on the bracket; a drive axle arranged on the bracket, an output end of the electric drive assembly being connected to the drive axle; a sub-frame, one end of the sub-frame being hinged to the bracket; a slewing support arranged on the sub-frame for being connected to a whole vehicle frame of a dump truck; a hydraulic cylinder, one end of the hydraulic cylinder being hinged to the bracket and the other end being hinged to the sub-frame or the slewing support; the power unit with load-carrying and steering functions further comprising: a connecting bracket arranged on the bracket; a first shaft pin passing through the connecting bracket and one end of the hydraulic cylinder; a second shaft pin passing through one of the sub-frame and the slewing support and the other end of the hydraulic cylinder; the power unit with load-carrying and steering functions further comprising: a third shaft pin passing through the sub-frame and the bracket; during the operation of the dump truck, the rotation of the slewing support drives the sub-frame and the front vehicle to rotate at an angle, and an angle is formed between the sub-frame and the whole vehicle frame, so that the lateral force generated by the friction between the front vehicle wheels and the ground provides sufficient steering force for the whole vehicle; by arranging the hydraulic cylinder, the angle between the bracket and the sub-frame is adjusted as the hydraulic cylinder is extended or retracted.

2. The power unit with bearing and steering functions according to claim 1, characterized in that, the electric drive assembly comprising: a drive motor; a gearbox, an output end of the drive motor being connected to the gearbox; a transmission shaft, the transmission shaft being connected to an output end of the gearbox, and the transmission shaft being connected to the drive axle.

3. The power unit with load-carrying and steering functions according to claim 1, wherein: the hydraulic cylinder is two, and the two hydraulic cylinders are located on both sides of the bracket.

4. The power unit with load-carrying and steering functions according to claim 1, wherein: the bracket is in a herringbone shape.

5. A new energy heavy-duty dump truck, characterized in that, Comprising: the power unit according to any one of claims 1 to 4.

6. The new energy heavy dump truck according to claim 5, characterized in that, Further comprising: a whole vehicle frame connected to the slewing support.

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