Integrated device for driving cooling fan and hydraulic pump and electric wheel truck

Abstract

The utility model discloses an integrated device and electric wheel mine truck of driving cooling fan and hydraulic pump belongs to the field of mine machinery. This integrated device includes driving motor, driving motor and driving motor drive shaft one end connection, driving motor drive shaft runs through cooling fan, and the other end of driving motor drive shaft that stretches out cooling fan sets up transmission flange, and transmission flange is connected with hydraulic pump through universal shaft, driving motor, cooling fan and hydraulic pump coaxial arrangement. This integrated device adopts " driving motor + cooling fan + hydraulic pump " coaxial series connection structure, and the installation space utilization is optimized, and the main generator axial dimension and motor weight are reduced, makes electric wheel mine truck layout more compact, and the whole vehicle weight is reduced significantly.

Description

Technical Field

[0001] This utility model belongs to the field of mining machinery technology, specifically relating to an integrated device for driving a cooling fan and a hydraulic pump, and an electric wheel mining truck. Background Technology

[0002] As mines expand and mining depths increase year by year, the difficulty and complexity of mining operations also gradually increase. To improve mining efficiency and reduce labor and vehicle operating costs, the trend towards larger mining trucks is becoming increasingly evident, especially with electric wheel mining trucks gradually becoming mainstream. However, existing electric wheel mining trucks have some shortcomings in their power transmission mechanisms, particularly in power transmission efficiency and cooling systems.

[0003] Traditional electric wheel mining truck hydraulic systems include lifting, hydraulic braking, and hydraulic steering systems, all crucial for the operation of the mining truck. However, the electric wheels are connected to the main drive shaft at the rear of the main generator via a universal joint. This design increases the axial dimension of the generator, thus adding to its weight. As the vehicle's weight increases, the power transmission efficiency of the mining truck gradually decreases, making it difficult to meet the ever-growing operational demands.

[0004] Furthermore, the electrical control cabinet, power components, and electric wheel traction motor of the electric wheel mining truck generate a large amount of heat during operation, requiring effective heat dissipation design. Currently, these components mainly rely on air cooling. Although this can meet cooling requirements in some situations, for large mining trucks, especially under heavy loads, the effectiveness and efficiency of the air cooling system are insufficient. Moreover, the air cooling system consumes a lot of power, increasing the vehicle's energy consumption and affecting overall operating efficiency.

[0005] Furthermore, existing designs rely on traditional cooling fans for heat dissipation. While high-performance mining trucks may be equipped with independent cooling fans, the cooling effect of traditional cooling fans is insufficient as the size of mining trucks increases. To ensure normal operation, cooling fans with larger airflow and air pressure are required, which further increases the axial dimension of the generator and the weight of the motor. Large cooling fans also require additional electrical control systems and control costs, increasing manufacturing and maintenance costs, and making the disassembly, assembly, and maintenance of mining trucks more complex and expensive.

[0006] In summary, the power transmission efficiency and heat dissipation system design of mining trucks face many challenges. Optimization is needed to improve the working efficiency of mining trucks, reduce energy consumption, and lower subsequent use and maintenance costs. Utility Model Content

[0007] To address the challenge of ensuring efficient heat dissipation while simultaneously making electric wheel mining trucks more integrated and lightweight, this invention provides an integrated device for driving a cooling fan and a hydraulic pump, as well as an electric wheel mining truck. This results in a compact overall structure for the electric wheel mining truck, reducing the overall weight and lowering costs.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] This utility model provides an integrated device for driving a cooling fan and a hydraulic pump, including a drive motor, one end of which is connected to a drive motor drive shaft, the drive motor drive shaft passing through the cooling fan, and the end of the drive motor drive shaft extending out of the cooling fan being connected to a transmission flange, the transmission flange being connected to the hydraulic pump via a universal joint; the drive motor, cooling fan and hydraulic pump are coaxially arranged.

[0010] The cooling fan includes a fan volute and a fan impeller. The fan volute is fixedly connected to the drive motor through a stop joint threaded connector. The fan impeller is disposed inside the fan volute and is fixedly connected to the drive motor transmission shaft.

[0011] The fan impeller includes blades and a hub. The blades are mounted on the hub, and a fan mount is installed inside the hub. The fan mount is fixedly connected to the drive motor transmission shaft via a spline sleeve.

[0012] The fan casing includes a vent and an outlet, which are located on the same side. The vent is close to the drive motor, and the outlet is close to the hydraulic pump.

[0013] The drive motor is a permanent magnet synchronous motor, which can be controlled by FOC vector control.

[0014] The drive motor has an outer diameter of 400~450mm and a power of 350~400kW.

[0015] The end of the drive motor drive shaft extending out of the cooling fan is provided with a stop and a threaded hole. The drive motor drive shaft is fixedly connected to the transmission flange through the stop and threaded connector.

[0016] The transmission flange is fixedly connected to the universal joint via a stop joint and threaded fastener.

[0017] This utility model also provides an electric wheel mining truck, which includes the above-mentioned integrated device for driving the cooling fan and hydraulic pump.

[0018] The integrated device for driving the cooling fan and hydraulic pump is installed on the chassis of the electric wheel mining truck and is used to cool the electric wheel drive motor or converter device.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This utility model provides an integrated device for driving a cooling fan and a hydraulic pump. It adopts a coaxial series structure of "drive motor + cooling fan + hydraulic pump," optimizing installation space utilization, reducing the axial dimension of the main generator and the weight of the motor, making the equipment layout more compact and significantly reducing the overall vehicle weight. The integrated design reduces the number of components, lowers procurement costs, and improves overall vehicle energy efficiency and operational safety. The small outer diameter drive motor enhances system stability and reliability, and the universal joint connecting the hydraulic pump and cooling fan avoids stress concentration, enhancing safety. This design not only simplifies system disassembly and maintenance, improving efficiency, but also effectively reduces production and maintenance costs, bringing long-term economic benefits to enterprises. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model 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.

[0022] Figure 1 This is a schematic diagram of the integrated device for driving the cooling fan and hydraulic pump according to this utility model;

[0023] The components include: 1. drive motor; 2. drive motor transmission shaft; 3. cooling fan; 4. transmission flange; 5. universal joint; 6. hydraulic pump; 7. vent; and 8. air outlet. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the utility model product is in use. These are merely for the convenience of describing the utility model 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 utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] This utility model provides an integrated device for driving a cooling fan and a hydraulic pump, including a drive motor 1, one end of which is connected to a drive motor transmission shaft 2, the drive motor transmission shaft 2 passing through a cooling fan 3, and a transmission flange 4 provided at the other end of the drive motor transmission shaft 2 extending out of the cooling fan 3, the transmission flange 4 being connected to a hydraulic pump 6 via a universal joint 5; the drive motor 1, the cooling fan 3, and the hydraulic pump 6 are coaxially arranged.

[0031] This invention integrates the drive motor 1, cooling fan, and hydraulic pump through a streamlined design, reducing the number of components and significantly lowering the overall vehicle procurement cost. Compared to existing systems that require multiple individual components, this integrated device uses a coaxial series structure of "drive motor + cooling fan + hydraulic pump," optimizing the use of installation space and significantly improving the compactness of the spatial layout. Furthermore, this integrated device effectively reduces the axial dimension and weight of the main generator, lowering the overall vehicle weight, improving energy efficiency, and reducing transportation and operating costs. The integrated design of this device makes system disassembly and replacement more convenient, and significantly improves subsequent maintenance efficiency.

[0032] In some embodiments, the cooling fan 3 includes a fan volute and a fan impeller. The fan volute is fixedly connected to the drive motor 1 via a threaded connector. The fan impeller is disposed inside the fan volute and fixedly connected to the drive motor transmission shaft 2. The fan impeller includes blades and a hub. The blades are disposed on the hub, and a fan seat is disposed inside the hub. The fan seat is fixedly connected to the drive motor transmission shaft 2 via a spline sleeve. The fan volute includes a vent 7 and an outlet 8, which are disposed on the same side. The vent 7 is close to the drive motor 1, and the outlet 8 is close to the hydraulic pump 6. The drive motor 1 and the cooling fan 3 transmit torque through the drive motor transmission shaft 2.

[0033] In some embodiments, the drive motor 1 is a permanent magnet synchronous motor, which can be controlled by FOC vector control. The outer diameter of the drive motor 1 is 400~450mm, and the power is 350~400kW. Preferably, the outer diameter of the drive motor 1 is 430mm, the power is 360kW, and the torque is 1800N.m. The drive motor 1 uses FOC vector control and serves as the sole power source to drive the cooling fan 3 and the hydraulic pump 6. The use of a permanent magnet synchronous motor provides higher working efficiency due to its high efficiency and low loss characteristics. The drive motor has a smaller outer diameter and suitable power and torque, which facilitates the selection and matching of the controller. In addition, the small outer diameter drive motor in the integrated device can also meet the needs of the cooling fan 3 and the hydraulic pump 6, thereby further improving the stability and reliability of the overall device.

[0034] In some embodiments, the end of the drive motor drive shaft 2 extending out of the cooling fan 3 is provided with a stop and a threaded hole. The drive motor drive shaft 2 is fixedly connected to the transmission flange 4 through a stop and threaded connector; the transmission flange 4 is fixedly connected to the universal joint 5 through a stop and threaded connector. The torque of the drive motor 1 is transmitted to the hydraulic pump 6 through the transmission flange 4 and the universal joint 5, ultimately driving the hydraulic pump 6 to rotate together with the drive motor 1. The universal joint 5 is used to connect the hydraulic pump 6 and the cooling fan 3, avoiding excessive stress concentration and further improving the overall vehicle operating safety.

[0035] This utility model also provides an electric wheel mining truck, which includes an integrated device for driving a cooling fan and a hydraulic pump. This integrated device has a compact design and occupies little space, thus offering greater flexibility and selectivity in the arrangement of the truck's chassis. In use, the drive motor 1 drives the cooling fan 3 and the hydraulic pump 6. The cooling fan 3 draws in air through its inlet and blows the cooling air into the rear axle or converter through its impeller to cool the electric wheel drive motor or converter.

[0036] In summary, through reasonable design optimization, this integrated device can effectively improve the overall performance of the equipment, reduce costs, and improve the convenience of later maintenance. It not only makes the equipment lighter and more energy-efficient, but also greatly reduces production and maintenance costs, bringing long-term economic benefits to enterprises.

[0037] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art can still make modifications or equivalent substitutions to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model are within the protection scope of the claims of this utility model pending approval.

Claims

1. An integrated device for driving a cooling fan and a hydraulic pump, characterized in that, It includes a drive motor (1), which is connected to one end of a drive motor transmission shaft (2). The drive motor transmission shaft (2) passes through a cooling fan (3). One end of the drive motor transmission shaft (2) extends out of the cooling fan (3) and is connected to a transmission flange (4). The transmission flange (4) is connected to a hydraulic pump (6) via a universal joint (5). The drive motor (1), cooling fan (3) and hydraulic pump (6) are coaxially arranged.

2. The integrated device for driving the cooling fan and hydraulic pump according to claim 1, characterized in that, The cooling fan (3) includes a fan volute and a fan impeller. The fan volute is fixedly connected to the drive motor (1) through a stop joint threaded connector. The fan impeller is set inside the fan volute and is fixedly connected to the drive motor transmission shaft (2).

3. The integrated device for driving the cooling fan and hydraulic pump according to claim 2, characterized in that, The fan impeller includes blades and a hub. The blades are set on the hub, and a fan seat is set inside the hub. The fan seat is fixedly connected to the drive motor transmission shaft (2) through a spline sleeve.

4. The integrated device for driving the cooling fan and hydraulic pump according to claim 2, characterized in that, The fan casing includes a vent (7) and an air outlet (8), which are located on the same side. The vent (7) is close to the drive motor (1), and the air outlet (8) is close to the hydraulic pump (6).

5. The integrated device for driving the cooling fan and hydraulic pump according to claim 1, characterized in that, The drive motor (1) is a permanent magnet synchronous motor, and the drive motor (1) can be controlled by FOC vector control.

6. The integrated device for driving the cooling fan and hydraulic pump according to claim 1, characterized in that, The outer diameter of the drive motor (1) is 400~450mm and the power is 350~400kW.

7. The integrated device for driving the cooling fan and hydraulic pump according to claim 1, characterized in that, The end of the drive motor transmission shaft (2) extending out of the cooling fan (3) is provided with a stop and a threaded hole. The drive motor transmission shaft (2) is fixedly connected to the transmission flange (4) through the stop and threaded connector.

8. The integrated device for driving the cooling fan and hydraulic pump according to claim 1, characterized in that, The transmission flange (4) is fixedly connected to the universal joint (5) through a stop joint threaded connector.

9. An electric wheel mining truck, characterized in that, The integrated device comprising the drive cooling fan and hydraulic pump as described in any one of claims 1-8.

10. The electric wheel mining truck according to claim 9, characterized in that, The integrated device for driving the cooling fan and hydraulic pump is installed on the chassis of the electric wheel mining truck and is used to cool the electric wheel drive motor or converter device.

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