A new energy heavy truck lifting system power station

Abstract

The application provides a lifting system power station of a new energy heavy truck, which comprises a controller, a motor, a converter, a gear pump and a lifting oil cylinder, the direct current side of the controller is electrically connected with a whole vehicle battery pack of the new energy heavy truck, the alternating current side of the controller is electrically connected with a stator winding of the motor, the direct current side of the converter is electrically connected with the whole vehicle battery pack, the alternating current side of the converter is electrically connected with the stator winding of the motor, the output shaft of the motor is connected with the gear pump, the gear pump is provided with a hydraulic oil pipe connected with the lifting oil cylinder, the lifting system power station does not need to rely on a whole vehicle running driving system to take power, does not need to arrange a power taking transmission component on a chassis, saves the chassis space, is convenient for modular integration of the whole vehicle and the hydraulic lifting system, and is suitable for the layout requirement of the chassis of a wheel edge driving heavy truck; the gravity potential energy can be converted into electric energy to charge the battery pack in a cargo box falling process, and the operation energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of new energy heavy-duty truck technology, and in particular to a lifting system power station for a new energy heavy-duty truck. Background Technology

[0002] As new energy heavy-duty truck technology develops towards high integration and modularity, wheel-side drive solutions are gradually becoming an industry trend. Wheel-side drive eliminates the traditional drive shaft and gearbox power take-off interface, making it impossible for the vehicle to obtain lifting power through a traditional power take-off unit. Therefore, the demand for independent lifting power sources is becoming increasingly prominent.

[0003] Traditional dump trucks typically rely on a power take-off (PTO) in the gearbox to drive a hydraulic pump via a driveshaft, providing power to the lifting system. This structure requires the PTO, driveshaft, and other components to be placed in the chassis, occupying chassis space and hindering modular design. New energy heavy trucks with wheel-side drive no longer have traditional mechanical PTO interfaces. If the existing PTO lifting solution is continued, significant chassis modifications are required, which is detrimental to the modular integration of the vehicle and the hydraulic lifting system.

[0004] Currently, some new energy heavy-duty truck lifting systems use electric motor-driven hydraulic pumps, but most operate in a unidirectional mode. During the cargo box's descent, the heavy-load gravitational potential energy is mainly dissipated as heat through throttling, resulting in low energy utilization. Heavy-load lifting requires high instantaneous power, and frequent operation consumes a large amount of the vehicle's battery power, reducing range and accelerating battery wear. Furthermore, most lifting units are deeply coupled with the vehicle's drive system, making it difficult to operate completely independently, which can easily lead to power distribution conflicts and make them unsuitable for the operating conditions of wheel-side drive vehicles.

[0005] Therefore, a new lifting system power station for new energy heavy-duty trucks needs to be designed to overcome the aforementioned technical defects. Summary of the Invention

[0006] The purpose of this invention is to provide a power station for the lifting system of a new energy heavy-duty truck that does not rely on the vehicle's drive system for power take-off. The chassis does not need to be equipped with power take-off transmission components, saving chassis space and facilitating modular integration of the vehicle and the hydraulic lifting system. It is also compatible with the chassis layout requirements of wheel-side drive heavy-duty trucks. During the cargo box's descent, gravitational potential energy can be converted into electrical energy to recharge the battery pack, reducing operational energy consumption.

[0007] To achieve the above objectives, the present invention provides a power station for a lifting system of a new energy heavy-duty truck, comprising: a controller, a motor, a converter, a gear pump, and a lifting cylinder.

[0008] The DC side of the controller is electrically connected to the battery pack of the new energy heavy truck, and the AC side of the controller is electrically connected to the stator winding of the motor. The DC side of the converter is electrically connected to the battery pack of the vehicle, and the AC side of the converter is electrically connected to the stator winding of the motor. The output shaft of the motor is connected to the gear pump, and the gear pump is equipped with a hydraulic oil pipe connected to the lifting cylinder.

[0009] Preferably, the lifting system power station of the new energy heavy truck vehicle further includes an insulating housing, on which a power interface electrically connected to the DC side of the controller is provided, and a charging interface electrically connected to the DC side of the converter is also provided on the insulating housing.

[0010] Preferably, the insulating box is provided with heat dissipation holes.

[0011] Preferably, the lifting system power station of the new energy heavy truck vehicle further includes a flange connecting sleeve, which is connected between the output shaft of the motor and the gear pump.

[0012] Preferably, the flange connection sleeve extends to the outside of the insulating housing and connects to the gear pump.

[0013] Compared with existing technologies, the advantages are: 1) It has two working modes. One working mode can output high-power hydraulic power to lift the heavy-duty cargo box and meet the unloading needs of heavy trucks; the other working mode can convert the gravitational potential energy of the cargo box into electrical energy to recharge the vehicle's battery pack, recover the energy that was originally dissipated, reduce operating energy consumption, reduce the heating of the hydraulic system, improve the working conditions of the battery, and extend the service life of the battery and hydraulic components.

[0014] 2) It does not rely on the vehicle's drive system for power take-off, and the chassis does not need to be equipped with power take-off transmission components, saving chassis space and facilitating modular integration of the vehicle and hydraulic lifting system, thus adapting to the chassis layout requirements of wheel-side drive heavy trucks.

[0015] Other features and advantages of the invention will be set forth in the following description, and in part will be apparent from the description, or may be learned by practice of the invention. The features and advantages of the invention may be realized and obtained by means of the elements and combinations specifically pointed out in the appended claims. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A 3D view of the lifting system power station of a new energy heavy-duty truck.

[0018] Figure 2 This is a schematic diagram of the power station of the lifting system for new energy heavy-duty trucks.

[0019] Figure 3 This is a three-dimensional view of the lifting system power station of a new energy heavy-duty truck from another perspective.

[0020] Reference numerals: 1. Controller; 2. Motor; 3. Converter; 4. Gear pump; 6. Insulating housing; 61. Power interface; 62. Charging interface; 7. Flange connection sleeve. Detailed Implementation

[0021] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are merely for explaining the invention and are not intended to limit the invention.

[0022] It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0023] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0025] Please see Figures 1 to 3This invention provides a lifting system power station for a new energy heavy-duty truck, comprising: a controller 1, a motor 2, a converter 3, a gear pump 4, and a lifting cylinder.

[0026] The DC side of the controller 1 is electrically connected to the battery pack of the new energy heavy truck vehicle, the AC side of the controller 1 is electrically connected to the stator winding of the motor 2, the DC side of the converter 3 is electrically connected to the battery pack of the vehicle, the AC side of the converter 3 is electrically connected to the stator winding of the motor 2, the output shaft of the motor 2 is connected to the gear pump 4, and the gear pump 4 is provided with a hydraulic oil pipe connected to the lifting cylinder.

[0027] It should be noted that in this embodiment, the motor 2 is a permanent magnet synchronous motor 2. The positive and negative terminals of the vehicle battery pack are respectively connected to the positive and negative terminals of the DC side of the controller 1. The controller 1 inverts the high-voltage DC power into three-phase (U, V, W) AC power to the three-phase stator windings of the motor 2. The positive and negative terminals of the DC side of the converter are electrically connected to the positive and negative terminals of the vehicle battery pack, respectively. The U, V, and W terminals of the AC side of the converter are electrically connected to the three-phase stator windings of the motor 2.

[0028] Work Mode 1:

[0029] When the cargo box of the new energy heavy-duty truck is lifted, the vehicle's battery pack outputs high-voltage DC power to the controller 1. The controller 1 inverts the high-voltage DC power into three-phase AC power to drive the motor 2 to rotate. The motor 2 drives the gear pump 4 to rotate forward. The gear pump 4 outputs hydraulic oil through hydraulic pipes to the lifting cylinder, causing the lifting cylinder to extend and realize the lifting action of the cargo box. At this time, the converter does not participate in energy conversion and is only in standby mode.

[0030] Working Mode Two:

[0031] When the cargo box of the new energy heavy truck falls back, the cargo box forces the lifting cylinder to retract. The lifting cylinder outputs hydraulic oil in the reverse direction to the gear pump 4 through the hydraulic oil pipe, causing the gear pump 4 to reverse. The gear pump 4 also drives the motor 2 to reverse. At this time, the rotor of the motor 2 rotates to form a rotating magnetic field. The rotating magnetic field cuts the stator winding of the motor 2, causing the stator winding to generate three-phase alternating electrical energy through electromagnetic induction. The three-phase alternating electrical energy is converted into direct current by the converter 3 to charge the vehicle's battery pack. The converted direct current does not pass through the controller 1.

[0032] Thus, this solution uses an independent lifting power station, which does not rely on the vehicle's drive system for power take-off. The chassis does not need to be equipped with power take-off transmission components, saving chassis space and facilitating modular integration of the vehicle and hydraulic lifting system. It is also compatible with the chassis layout requirements of wheel-side drive heavy trucks. During the cargo box's descent process, gravitational potential energy can be converted into electrical energy to recharge the battery pack, reducing operational energy consumption.

[0033] In one specific embodiment, the lifting system power station of the new energy heavy truck vehicle further includes an insulating housing 6, on which a power interface 61 electrically connected to the DC side of the controller 1 is provided, and a charging interface 62 electrically connected to the DC side of the converter 3 is also provided on the insulating housing 6.

[0034] In this way, the power input terminal of the vehicle battery pack can be easily connected to the DC side of the controller 1, and the charging port of the vehicle battery pack can be easily connected to the DC side of the converter 3 through the charging interface 62.

[0035] In one specific embodiment, the insulating housing 6 is provided with heat dissipation holes. Since both working modes cause the motor 2 to generate a large amount of heat rapidly, the heat dissipation holes on the insulating housing 6 can enable air convection between the inside of the motor 2 and the outside air, so as to dissipate the heat generated by the windings and rotor of the motor 2 in a timely manner and avoid heat accumulation inside the motor 2.

[0036] In one specific embodiment, the lifting system power station of the new energy heavy truck vehicle further includes a flange connecting sleeve 7, which is fixedly connected between the output shaft of the motor 2 and the gear pump 4.

[0037] In this way, bidirectional torque can be stably transmitted, which can transmit the output torque of motor 2 to gear pump 4 to achieve lifting operation, and can also reliably transmit the reverse torque of gear pump 4 to permanent magnet synchronous motor 2 under potential energy recovery conditions; at the same time, it plays the role of shaft diameter transition and compensating for assembly errors.

[0038] In one specific embodiment, the flange connecting sleeve 7 extends to the outside of the insulating housing 6 and connects to the gear pump 4.

[0039] Thus, the motor 2 is housed inside the insulating housing 6, which provides protection, insulation, and noise reduction for the motor 2. The flange connecting sleeve 7 extends outward and is fixedly connected to the gear pump 4 outside the insulating housing 6, which can prevent hydraulic oil leakage and oil contamination from the gear pump 4 from directly entering the insulating housing 6, thus avoiding contamination of the stator windings and terminals of the motor 2, protecting the electrical components of the motor 2, and reducing the risk of short circuits and leakage.

[0040] The present invention is not limited to the description in the specification and embodiments, and thus other advantages and modifications can be readily realized by those skilled in the art. Therefore, the present invention is not limited to the specific details, representative devices and illustrated examples shown and described herein without departing from the spirit and scope of the general concept as defined by the claims and their equivalents.

Claims

1. A lifting system power station for a new energy heavy-duty truck, characterized in that, include: The controller (1), motor (2), converter (3), gear pump (4) and lifting cylinder (5) are included. The DC side of the controller (1) is electrically connected to the battery pack of the new energy heavy truck vehicle, the AC side of the controller (1) is electrically connected to the stator winding of the motor (2), the DC side of the converter (3) is electrically connected to the battery pack of the vehicle, the AC side of the converter (3) is electrically connected to the stator winding of the motor (2), the output shaft of the motor (2) is connected to the gear pump (4), and the gear pump (4) is provided with a hydraulic oil pipe connected to the lifting cylinder (5).

2. The lifting system power station for new energy heavy-duty trucks as described in claim 1, characterized in that, The lifting system power station of the new energy heavy truck also includes an insulating box (6), on which a power interface (61) electrically connected to the DC side of the controller (1) is provided, and a charging interface (62) electrically connected to the DC side of the converter (3) is also provided on the insulating box (6).

3. The lifting system power station for new energy heavy-duty trucks as described in claim 2, characterized in that, The insulating box (6) has heat dissipation holes.

4. The lifting system power station for new energy heavy-duty trucks as described in claim 2, characterized in that, The lifting system power station of the new energy heavy truck also includes a flange connecting sleeve (7), which is connected between the output shaft of the motor (2) and the gear pump (4).

5. The lifting system power station for new energy heavy-duty trucks as described in claim 4, characterized in that, The flange connecting sleeve (7) extends to the outside of the insulating housing (6) and connects to the gear pump (4).

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