Hybrid dump truck

Abstract

The embodiment of the application discloses a hybrid power self-dumping truck, which comprises a main frame, a sub-frame, a through type double wheel side reduction drive axle assembly, a wheel side reduction electric drive axle, a fuel drive assembly and an electric drive assembly. The fuel drive assembly is arranged on the main frame and used for providing driving force for the through type double wheel side reduction drive axle assembly. The electric drive assembly is arranged on the sub-frame and used for providing driving force for the wheel side reduction electric drive axle. On the one hand, the hybrid power self-dumping truck can provide power through the fuel drive assembly as the main power system and the electric drive assembly as the auxiliary power system, can optimize the platform structure, and can meet the power demand after the equipment is large-sized. On the other hand, the main and auxiliary power systems are arranged on the frame and the sub-frame respectively, so that the carrying capacity of the hybrid power self-dumping truck can be improved, and the transport capacity demand can be met.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of dump trucks, in particular to a hybrid dump truck. BACKGROUND

[0002] With the continuous expansion of mining scale, the continuous tightening of national environmental protection policy, and the increasing purchasing power of stripping contractors, the demand for large-scale vehicles is becoming increasingly apparent. At present, the vehicles produced by domestic manufacturers are mainly traditional 6x4 dump truck platform structures, which mainly have the following problems:

[0003] 1. The platform structure is rigid, and the power system is a fuel engine + reduction gearbox + through type double wheel side reduction drive axle, and the domestic power related parts cannot meet the power demand after the equipment is large-scale.

[0004] 2. The carrying capacity is not high, and is limited by the carrying capacity of the leaf spring suspension and axle, the carrying capacity of the whole vehicle is not high, the GVW (gross vehicle weight) of the existing product is less than 100 tons, and the carrying capacity cannot meet the requirements. SUMMARY

[0005] The present application aims to at least solve one of the problems in the prior art or related art.

[0006] Therefore, the embodiment of the present application provides a hybrid dump truck, which comprises:

[0007] a main frame;

[0008] a sub-frame connected to the main frame;

[0009] a through type double wheel side reduction drive axle assembly and a wheel side reduction electric drive axle;

[0010] a fuel drive assembly arranged on the main frame and connected to the through type double wheel side reduction drive axle assembly;

[0011] an electric drive assembly arranged on the sub-frame and connected to the wheel side reduction electric drive axle.

[0012] In a feasible implementation, the fuel drive assembly comprises:

[0013] an engine arranged on the main frame;

[0014] a gearbox connected to the output end of the engine;

[0015] a transfer case connected to the output end of the gearbox, and the transfer case is connected to the through type double wheel side reduction drive axle assembly.

[0016] In a feasible implementation, the through type double wheel side reduction drive axle assembly comprises:

[0017] The through-type wheel-side reduction middle axle and the through-type wheel-side reduction rear axle are connected through an axle member transmission shaft.

[0018] In an available embodiment, the electric drive assembly comprises:

[0019] A permanent magnet synchronous motor is arranged on the sub-frame.

[0020] A motor reduction gearbox is connected to the output end of the permanent magnet synchronous motor, and the motor reduction gearbox is connected to the wheel-side reduction electric drive axle.

[0021] In an available embodiment, the hybrid dump truck further comprises:

[0022] A rotary bearing structure is arranged between the main frame and the sub-frame.

[0023] In an available embodiment, the hybrid dump truck further comprises:

[0024] A first support is arranged on the main frame.

[0025] A second support is arranged on the through-type double wheel-side reduction drive axle assembly.

[0026] A load cylinder is arranged between the first support and the second support.

[0027] In an available embodiment, the hybrid dump truck further comprises:

[0028] A plurality of load cylinders are arranged on each axle of the through-type double wheel-side reduction drive axle assembly, and an energy storage device is connected to the plurality of load cylinders to adjust the pressure of the plurality of load cylinders.

[0029] In an available embodiment, the hybrid dump truck further comprises:

[0030] A balance pipeline is arranged between the energy storage device and the load cylinder.

[0031] In an available embodiment, the hybrid dump truck further comprises:

[0032] A fixed support is arranged between the through-type double wheel-side reduction drive axle assembly and the main frame.

[0033] In an available embodiment, the through-type double wheel-side reduction drive axle assembly further comprises:

[0034] A load bearing axle is connected to the main frame by the fixed support.

[0035] Compared with the prior art, the hybrid dump truck provided by the embodiment of the application comprises a main frame, a sub-frame, a through-type double-wheel reduction drive axle assembly, a wheel reduction electric drive axle, a fuel drive assembly and an electric drive assembly. The fuel drive assembly is arranged on the main frame to provide driving force for the through-type double-wheel reduction drive axle assembly, and the electric drive assembly is arranged on the sub-frame to provide driving force for the wheel reduction electric drive axle. On the one hand, the hybrid dump truck provided by the embodiment of the application can use the fuel drive assembly as a main power system and use the electric drive assembly as an auxiliary power system, and can provide power through the two modes, so that the platform structure can be optimized and the power demand after the equipment is large-sized can be met. On the other hand, the main and auxiliary power systems are arranged on the frame and the sub-frame respectively, so that the carrying capacity of the hybrid dump truck can be improved and the transport capacity demand can be met. On the other hand, the fuel drive assembly is used as the main power system and the electric drive assembly is used as the auxiliary power system, and the main and auxiliary power systems are arranged on the frame and the sub-frame respectively, so that the transmission shaft interference problem can be solved, the equivalent angle of the transmission shaft can be optimized, and the service life of the transmission shaft can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] 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 in different figures represent the same or similar components. In the drawings:

[0037] Figure 1 a schematic structural diagram of a hybrid dump truck according to an embodiment of the application;

[0038] Figure 2 a schematic structural diagram of a main frame and a sub-frame of a hybrid dump truck according to an embodiment of the application in a connected state;

[0039] Figure 3 a schematic structural diagram of a load bearing oil cylinder and an energy accumulator of a hybrid dump truck according to an embodiment of the application;

[0040] Figure 4 a schematic structural diagram of a through-type double-wheel reduction drive axle assembly of a hybrid dump truck according to an embodiment of the application.

[0041] wherein, Figures 1 to 4 The correspondence between the reference numerals in the drawings and the component names is as follows:

[0042] 110 main frame, 120 sub-frame, 130 through type double wheel side reduction drive axle assembly, 140 wheel side reduction electric drive axle, 150 fuel drive assembly, 160 electric drive assembly, 170 axle member transmission shaft, 180 first support, 190 second support, 200 load bearing oil cylinder, 210 energy accumulator, 220 balance pipeline, 230 fixed support;

[0043] 131 through type wheel side reduction intermediate axle, 132 through type wheel side reduction rear axle, 133 load bearing axle, 151 engine, 152 transmission, 153 transfer case, 154 transmission shaft, 161 permanent magnet synchronous motor, 162 motor reduction gearbox. DETAILED DESCRIPTION

[0044] 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.

[0045] As shown in Figures 1 to 4 The embodiments of the present application propose a hybrid dump truck, comprising: a main frame 110; a sub-frame 120 connected to the main frame 110; a through type double wheel side reduction drive axle assembly 130 and a wheel side reduction electric drive axle 140; a fuel drive assembly 150 arranged on the main frame 110 and connected to the through type double wheel side reduction drive axle assembly 130; and an electric drive assembly 160 arranged on the sub-frame 120 and connected to the wheel side reduction electric drive axle 140.

[0046] The hybrid dump truck provided by the embodiment of the application comprises a main frame 110, a sub-frame 120, a through type double-wheel edge reduction drive axle assembly 130, a wheel edge reduction electric drive axle 140, a fuel drive assembly 150 and an electric drive assembly 160. The fuel drive assembly 150 is arranged on the main frame 110 and is used for providing driving force for the through type double-wheel edge reduction drive axle assembly 130. The electric drive assembly 160 is arranged on the sub-frame 120 and is used for providing driving force for the wheel edge reduction electric drive axle 140. On the one hand, the hybrid dump truck provided by the embodiment of the application can use the fuel drive assembly 150 as a main power system and use the electric drive assembly 160 as an auxiliary power system, and power is provided by mixing the two ways, so that the platform structure can be optimized and the power demand after the equipment is large-sized can be met. On the other hand, the main and auxiliary power systems are arranged on the frame and the sub-frame 120 respectively, so that the carrying capacity of the hybrid dump truck can be improved and the transport demand can be met. On the other hand, the fuel drive assembly 150 is used as the main power system and the electric drive assembly 160 is used as the auxiliary power system, and the main and auxiliary power systems are arranged on the frame and the sub-frame 120 respectively, so that the transmission shaft interference problem can be solved, the equivalent angle of the transmission shaft can be optimized and the service life of the transmission shaft can be improved.

[0047] In a feasible implementation, the fuel drive assembly 150 comprises an engine 151 arranged on the main frame 110, a gearbox 152 connected to the output end of the engine 151, and a transfer case 153 connected to the output end of the gearbox 152, wherein the transfer case 153 is connected to the through type double-wheel edge reduction drive axle assembly 130.

[0048] In the technical solution, the structure of the fuel drive assembly 150 is further provided. The fuel drive assembly 150 comprises the engine 151, the gearbox 152 and the transfer case 153. The engine 151 and the gearbox 152 form a power assembly and are installed on the main frame 110. The power is transmitted to the transfer case 153 through the transmission shaft. The transfer case 153 reduces the height of the transmission shaft and transmits the power to the through type double-wheel edge reduction drive axle assembly 130, so as to provide driving force for the dump truck through fuel combustion.

[0049] In a feasible implementation, the through type double-wheel edge reduction drive axle assembly 130 comprises a through type wheel edge reduction middle axle 131 and a through type wheel edge reduction rear axle 132, and the through type wheel edge reduction middle axle 131 and the through type wheel edge reduction rear axle 132 are connected through an axle transmission shaft 170.

[0050] In the technical solution, further provided is the structural composition of the through-type double wheel-side reduction drive axle assembly 130, which includes a through-type wheel-side reduction middle axle 131 and a through-type wheel-side reduction rear axle 132. The engine 151 and the gearbox 152 form a power assembly, which is installed on the main frame 110 and transmits power to the transfer case 153 through a transmission shaft. The transfer case 153 transmits power to the through-type wheel-side reduction middle axle 131 and the through-type wheel-side reduction rear axle 132 after reducing the height of the transmission shaft, so as to provide driving force for the dump truck through fuel combustion.

[0051] It can be understood that when the through-type double wheel-side reduction drive axle assembly 130 is driven by the fuel driving assembly 150, the through-type wheel-side reduction middle axle 131 distributes the input torque 1:1, one-half of the torque is transmitted to the tire of the through-type wheel-side reduction middle axle 131, and the other half of the torque is transmitted to the through-type wheel-side reduction rear axle 132 through the inter-axle transmission shaft.

[0052] In an available implementation, the electric driving assembly 160 includes a permanent magnet synchronous motor 161 arranged on the sub-frame 120 and a motor reduction gearbox 162 connected to the output end of the permanent magnet synchronous motor 161, the motor reduction gearbox 162 being connected to the wheel-side reduction electric drive axle 140.

[0053] In the technical solution, further provided is the structural composition of the electric driving assembly 160, which can include the permanent magnet synchronous motor 161 and the motor reduction gearbox 162. The permanent magnet synchronous motor 161 and the motor reduction gearbox 162 form an electric driving power assembly, which is installed on the sub-frame 120. Power is transmitted to the wheel-side reduction electric drive axle 140 through a transmission shaft, so as to provide driving force for the dump truck through electric power.

[0054] In an available implementation, the hybrid dump truck further includes a rotary bearing structure, and the main frame 110 is connected to the sub-frame 120 through the rotary bearing structure.

[0055] In the technical scheme, the hybrid power self-unloading truck can further comprise a rotating bearing structure, the main frame 110 is connected to the auxiliary frame 120 through the rotating bearing structure, and rotation steering is realized in the bearing process, and the same structure replaces the bearing bridge 133 in the conventional technology; the driving form of the vehicle can be optimized from 8x6 to 8x8, and power and steering arrangement is more flexible. Rotation of the rotating bearing structure can drive the auxiliary frame 120 and the front vehicle part to produce a rotation angle, the auxiliary frame 120 can form a certain angle with the whole vehicle frame, so that the lateral force generated by the front vehicle wheel and the ground friction can provide sufficient steering force for the whole vehicle, and the steering action of the whole vehicle is realized. In various working conditions of the self-unloading truck, the tire force is transmitted to the whole vehicle frame, the bearing and driving effects are achieved, through the setting of the rotating bearing structure, 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 is improved.

[0056] In a feasible implementation manner, the hybrid power self-unloading truck further comprises: a first support 180 arranged on the main frame 110; a second support 190 arranged on the through-type double-wheel side reduction drive axle assembly 130; and a bearing oil cylinder 200, two ends of the bearing oil cylinder 200 being connected to the first support 180 and the second support 190 respectively.

[0057] In the technical scheme, the hybrid power self-unloading truck can further comprise the first support 180, the second support 190 and the bearing oil cylinder 200, the bearing oil cylinder 200 is connected to the through-type double-wheel side reduction drive axle assembly 130 and the axle of the reduction electric drive axle through the first support 180 and the second support 190, the connection can realize the connection of the working pressure, balance the load and reduce the impact load of the axle and the frame.

[0058] In a feasible implementation manner, the hybrid power self-unloading truck further comprises: an energy accumulator 210, the bearing oil cylinder 200 is a plurality of, at least one bearing oil cylinder 200 is arranged on each axle of the through-type double-wheel side reduction drive axle assembly 130, and the energy accumulator 210 is connected to the plurality of bearing oil cylinders 200 to adjust the pressure of the plurality of bearing oil cylinders 200.

[0059] In the technical scheme, the hybrid power self-unloading truck can further comprise the energy accumulator 210, through the energy accumulator 210, the working pressure of the bearing oil cylinder 200 can be adjusted, for example, Figure 3As shown, the first load-bearing oil cylinder 200 and the second load-bearing oil cylinder 200 (same model) on the same side (for example, the right side) of the whole vehicle are connected with the energy accumulator 210; if the load of the first load-bearing oil cylinder 200 increases, the internal pressure is greater than that of the second load-bearing oil cylinder 200, and the gas enters the second load-bearing oil cylinder 200 from the first load-bearing oil cylinder 200, and finally the pressure of the load-bearing oil cylinder 200 is the same as that in the energy accumulator 210, and the load is balanced. The same connection mode is applied to the third load-bearing oil cylinder 200 and the fourth load-bearing oil cylinder 200. Finally, the front and rear balance pipelines 220 are connected, and under the joint action of the front and rear energy accumulators 210, the pressures in the four load-bearing oil cylinders 200 are the same or similar.

[0060] In a feasible implementation, the hybrid power self-unloading vehicle further comprises balance pipelines 220, which guide the energy accumulators 210 and the load-bearing oil cylinders 200.

[0061] In the technical scheme, the balance pipelines 220 are further included, and the setting of the balance pipelines 220 facilitates the connection of the energy accumulators 210 and the load-bearing oil cylinders 200 and facilitates the adjustment of the working pressure of the load-bearing oil cylinders 200.

[0062] In a feasible implementation, the hybrid power self-unloading vehicle further comprises a fixed support 230, and the through-type double-wheel-side reduction drive axle assembly 130 is connected to the main vehicle frame 110 through the fixed support 230.

[0063] In a feasible implementation, the through-type double-wheel-side reduction drive axle assembly 130 further comprises:

[0064] A load-bearing axle 133 is connected to the main vehicle frame 110 through the fixed support 230.

[0065] In the technical scheme, the hybrid power self-unloading vehicle can further comprise a fixed support 230, and the through-type wheel-side reduction middle axle 131, the through-type wheel-side reduction rear axle 132, the load-bearing axle 133 and the wheel-side reduction electric drive axle 140 are connected to the main vehicle frame 110 through the fixed support 230, so as to facilitate the transmission of driving force, braking force and side sliding force to the main vehicle frame 110.

[0066] Embodiment 1

[0067] The embodiment of the present application provides a hybrid power self-unloading vehicle, which comprises a main vehicle frame 110, a sub-vehicle frame 120 connected to the main vehicle frame 110, a through-type double-wheel-side reduction drive axle assembly 130 and a wheel-side reduction electric drive axle 140, a fuel drive assembly 150 arranged on the main vehicle frame 110 and connected to the through-type double-wheel-side reduction drive axle assembly 130, and an electric drive assembly 160 arranged on the sub-vehicle frame 120 and connected to the wheel-side reduction electric drive axle 140.

[0068] The main power of the hybrid dump truck provided by the embodiment of the application can adopt a traditional fuel engine 151, and the torque is transmitted to a through double wheel side reduction drive axle through a reduction box. The auxiliary power system can adopt a permanent magnet synchronous motor 161, and the torque is transmitted to a wheel side reduction electric drive axle 140 after being reduced by an electric drive reduction box.

[0069] The embodiment of the application solves the problem of interference between the main power system and the auxiliary power system transmission shaft arrangement by arranging the main and auxiliary power systems on the main frame 110 and the sub-frame 120. The main power system transmits the torque to the double wheel side reduction drive axle through the transfer case 153 after reducing the height of the transmission end shaft, and the auxiliary power system is installed on the sub-frame 120 with a lower height, and can be directly connected to the electric drive axle through the transmission shaft. That is, the transmission shaft arrangement problem is solved, the equivalent angle of the transmission shaft is optimized, and the service life of the transmission shaft is improved.

[0070] The sub-frame 120 is coupled to the main frame 110 through a rotary support, and the sub-frame 120 rotates around the frame through the rotary support to realize steering.

[0071] The embodiment of the application considers that the road conditions in the mining area are poor, overloading is common, and the failure rate of leaf spring suspension is high. The application solves the problem of traditional vehicle suspension failure by using the oil and gas suspension load cylinder 200 structure. Each load-bearing axle uses two load cylinders 200, and the same side of multiple load cylinders 200 is connected through a central energy accumulator 210, which is convenient for load balancing and vehicle posture adjustment. Instead of using traditional parallel shaft leaf spring suspension, the number of load-bearing and drive axles can be arranged at will, the carrying capacity of the whole vehicle is increased, and the transportation efficiency is improved.

[0072] The sub-frame 120 and the auxiliary power system form a power unit, and when used in combination with the load cylinder 200, different drive forms and steering forms of vehicle models can be arranged 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 side reduction axle, and after combination, an 8x8 drive form is realized, and the first and second axles are steered vehicle models. Because the power unit is arranged flexibly, 6x6, 8x6 and other different drive forms and steering forms of vehicle models can be developed.

[0073] The main power system and the auxiliary power system are coupled through electronic control. The auxiliary system collects vehicle VCU related vehicle operation data and performs logical judgment. When the vehicle needs torque, it is driven in time, and when the vehicle brakes, energy is recovered. Even when the battery power is insufficient, it can be charged.

[0074] In the present application, the terms "first", "second", "third" are only used for descriptive purpose, and should not be understood as indicating or implying relative importance. The term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mount", "connect", "connection", "fix", and the like should be interpreted broadly, for example, "connection" can be fixed connection, or detachable connection, or integral connection; "connection" can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0075] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate the orientation or positional relationship based on 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 device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, should not be understood as a limitation on the present application.

[0076] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment", and the like, mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0077] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A hybrid dump truck, characterized by The hybrid dump truck comprises: a main frame; a sub-frame connected to the main frame; a through-type double-wheel reduction drive axle assembly and a wheel reduction electric drive axle; a fuel drive assembly arranged on the main frame and connected to the through-type double-wheel reduction drive axle assembly; an electric drive assembly arranged on the sub-frame and connected to the wheel reduction electric drive axle. The hybrid dump truck further comprises: a swing bearing structure, through which the main frame is connected to the sub-frame. The hybrid dump truck further comprises: a first support arranged on the main frame; a second support arranged on the through-type double-wheel reduction drive axle assembly; a load-carrying oil cylinder, both ends of which are connected to the first support and the second support, respectively. The hybrid dump truck further comprises: a plurality of load-carrying oil cylinders, at least one of which is arranged on each axle of the through-type double-wheel reduction drive axle assembly, and a storage device connected to the load-carrying oil cylinders to adjust the pressure of the load-carrying oil cylinders.

2. The hybrid dump truck of claim 1, wherein, The fuel drive assembly comprises: an engine arranged on the main frame; a gearbox connected to the output end of the engine; a transfer case connected to the output end of the gearbox, and connected to the through-type double-wheel reduction drive axle assembly.

3. The hybrid dump truck of claim 1, wherein, The through-type double-wheel reduction drive axle assembly comprises: a through-type wheel reduction intermediate axle and a through-type wheel reduction rear axle, which are connected through an axle transmission shaft.

4. The hybrid dump truck of claim 1, wherein, The electric drive assembly comprises: a permanent magnet synchronous motor arranged on the sub-frame; a motor reduction gearbox connected to the output end of the permanent magnet synchronous motor, and connected to the wheel reduction electric drive axle.

5. The hybrid dump truck of claim 1, wherein, Further comprising: a balance pipeline connecting the storage device and the load-carrying oil cylinder.

6. The hybrid dump truck of claim 1, wherein, Further comprising: a fixed support, through which the through-type double-wheel reduction drive axle assembly is connected to the main frame.

7. The hybrid dump truck of claim 6, wherein, The through-type double-wheel reduction drive axle assembly further comprises: a load-carrying axle connected to the main frame through the fixed support.

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