Electric wheel dump truck and drive axle ventilation system

Abstract

The utility model discloses an embodiment provides a kind of drive axle ventilation system, comprising: drive axle body, the drive axle body includes motor installation cavity and the motor body being arranged in the motor installation cavity;The drive axle body is also provided with the first vent with the motor installation cavity intercommunication;Connecting frame, one end is connected the drive axle body, opposite another end is used to connect frame;Radiating fan, with the connecting frame fixed connection, the air outlet of the radiating fan with the first vent intercommunication.An embodiment provided by the utility model discloses electric wheel dump truck and drive axle ventilation system have good heat dissipation effect and are not easily damaged, etc.

Description

Technical Field

[0001] This utility model relates to the field of mining machinery technology, and in particular to an electric wheel dump truck and a drive axle ventilation system. Background Technology

[0002] Electric wheel dump trucks generate significant heat in components such as the drive control cabinet, generator, and traction motor within the drive axle, requiring cooling for proper operation. Current technology uses a centralized cooling air source to deliver cool air to these components. However, different components operate under varying conditions and have different heat dissipation requirements. A centralized cooling air source struggles to distribute airflow effectively across all parts; insufficient airflow fails to adequately cool the traction motor, while excessive airflow wastes energy. Furthermore, the drive axle is located a considerable distance from the centralized air source, necessitating the use of ductwork for cooling. This ductwork is lengthy, ineffective, and prone to loosening or cracking during truck operation due to vibrations. Utility Model Content

[0003] The purpose of this utility model is to provide an electric wheel dump truck and drive axle ventilation system that addresses at least some of the deficiencies of the prior art. This system can independently ventilate and dissipate heat from the motor inside the drive axle, making it easy to adjust the airflow, prevent energy waste, and provide better heat dissipation and is less prone to damage.

[0004] One embodiment of this utility model provides a drive axle ventilation system, comprising: a drive axle body, the drive axle body including a motor mounting cavity and a motor body disposed within the motor mounting cavity; the drive axle body further having a first ventilation port communicating with the motor mounting cavity; a connecting frame, one end of which is connected to the drive axle body, and the other end of which is used to connect to the vehicle frame; and a cooling fan fixedly connected to the connecting frame, the air outlet of the cooling fan communicating with the first ventilation port.

[0005] In some embodiments, a ventilation duct is formed within the connecting frame, and the air outlet of the cooling fan is connected to the first ventilation opening through the ventilation duct.

[0006] In some embodiments, the drive axle body includes a drive axle housing, and the motor mounting cavity is formed within the drive axle housing; a heat dissipation gap communicating with the first vent is formed between the motor body and the inner wall of the drive axle housing; the drive axle housing also includes a second vent; and the rotor internal clearance of the motor body communicates between the heat dissipation gap and the second vent.

[0007] In some embodiments, the number of motor bodies is two; a space is formed in the drive axle housing between the two motor bodies, and the heat dissipation gap is located on the side of the corresponding motor body away from the space and separated from the space; the second vent is located between the two motor bodies and communicates with the rotor gap in the two motor bodies respectively through the space.

[0008] In some embodiments, the number of motor bodies is two; the drive axle housing includes a middle section and two end sections located at opposite ends of the middle section, and the two motor bodies are respectively located at opposite ends of the middle section; the connecting frame is connected to the middle section.

[0009] In some embodiments, the intermediate section and the two end sections together form the motor mounting cavity, with a portion of each motor body located in the intermediate section and another portion located in the corresponding end sections.

[0010] In some embodiments, the motor mounting cavity is formed within the two end segments, and the two end segments are integrally disposed with the stator of the motor body.

[0011] In some embodiments, the connecting frame is an A-frame.

[0012] In some embodiments, the device further includes a temperature detection component and a control component. The temperature detection component is disposed within the motor body, and the control component is electrically connected to both the temperature detection component and the cooling fan. The control component is used to control the rotational speed of the cooling fan based on the detection data from the temperature detection component.

[0013] This utility model embodiment also provides an electric wheel dump truck, including the drive axle ventilation system described in any of the foregoing claims.

[0014] The above embodiments of this utility model have at least one or more of the following beneficial effects: By installing a cooling fan fixed to the connecting frame in the drive axle ventilation system, compared to a traditional centralized cooling air source, airflow can be independently provided to the motor body within the drive axle for cooling, facilitating individual airflow adjustment and preventing energy waste. Furthermore, since the cooling fan is fixedly connected to the connecting frame, when the electric wheel dump truck experiences wheel bounce, the cooling fan moves along with the connecting frame, and the two remain relatively stationary, thus avoiding the fatigue damage problem caused by the reciprocating motion of the air duct in traditional air-cooled systems. Attached Figure Description

[0015] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0016] Figure 1 This is a three-dimensional structural diagram of a drive axle ventilation system provided in one embodiment of the present invention.

[0017] Figure 2 for Figure 1 The diagram shows an exploded view of part of the drive axle ventilation system.

[0018] Figure 3 for Figure 1 An exploded structural diagram of another embodiment of the drive axle ventilation system is shown.

[0019] Figure 4 for Figure 1 A partial cross-sectional schematic diagram of the drive axle ventilation system is shown.

[0020] Figure 5 for Figure 4 A magnified view of a portion of region A in the middle.

[0021] Figure 6 This is a three-dimensional structural diagram of an electric wheel dump truck according to another embodiment of the present invention.

[0022] [Explanation of Labels in the Attached Image]

[0023] 100. Electric wheel dump truck;

[0024] 10. Drive axle ventilation system; 11. Drive axle body; 111. Motor mounting cavity; 112. Motor body; 1121. Stator; 1122. Rotor internal clearance; 113. First ventilation port; 114. Drive axle housing; 1141. Spacing; 1142. Middle section; 1143. End sections; 115. Heat dissipation gap; 117. Second ventilation port; 118. Suspension; 119. Wheel-side reducer; 12. Connecting frame; 121. Ventilation duct; 122. Diagonal bar; 123. Cross bar; 124. Mounting base; 13. Cooling fan;

[0025] 20. Frame. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] To enable those skilled in the art to better understand the technical solutions of this utility model, 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, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] It should also be noted that the division of multiple embodiments in this utility model is only for the convenience of description and should not constitute a special limitation. Features in various embodiments can be combined and referenced in each other without contradiction.

[0030] Reference Figure 1 This utility model embodiment provides a drive axle ventilation system 10, including a drive axle body 11, a connecting frame 12, and a cooling fan 13. The drive axle body 11 includes a motor mounting cavity 111 (see reference). Figure 4 ) and the motor body 112 (refer to) disposed in the motor mounting cavity 111. Figure 2 The drive axle body 11 is also provided with a first ventilation port 113 communicating with the motor mounting cavity 111 (see reference). Figure 2 One end of the connecting bracket 12 is connected to the drive axle body 11, and the other end is used to connect to the vehicle frame. The cooling fan 13 is fixedly connected to the connecting bracket 12, and the air outlet of the cooling fan 13 is connected to the first ventilation port 113.

[0031] The drive axle body 11 can serve as the rear axle of an electric wheel dump truck (or mining dump truck), and may include a traction motor (specifically shown as motor body 112 in this embodiment) for providing power, and a suspension 118 (see reference). Figure 1 The drive axle housing 114 is used for buffering and shock absorption, and the wheel-side reducer 119 is used to reduce speed and increase torque to meet driving requirements; the drive axle housing 114 provides installation space for the motor body 112 and other equipment, supports and protects internal components, and can also connect with the suspension 118, connecting frame 12, etc., to provide support and withstand various loads during driving. Specifically, the drive axle body 11 includes the drive axle housing 114, and the motor mounting cavity 111 is formed within the drive axle housing 114. (See reference...) Figure 2 There are two motor bodies 112, and two corresponding wheel-side reducers 119, which can provide power to the left and right wheels respectively.

[0032] The connecting frame 12 is used to connect the drive axle body 11 and the vehicle frame, and to transmit forces and torques in various directions. Specifically, the connecting frame 12 can be an A-frame or a triangular frame, etc. In this embodiment, an A-frame is used as an example, as the A-frame offers higher stability and reliability in torque transmission. (Refer to...) Figure 2 and Figure 4 The A-frame includes at least two diagonal braces 122. One end of each brace 122 is connected, forming an angle between them. The other ends are connected to the drive axle body 11, specifically to the drive axle housing 114. The connected end of the two diagonal braces 122 is used to connect to the vehicle frame. By providing two diagonal braces 122 to the connecting frame 12, forces in different directions can be borne, reducing stress concentration, lowering the possibility of structural fatigue damage, and ensuring service life.

[0033] The cooling fan 13 can be a centrifugal fan, including a motor and a volute casing. (Refer to...) Figure 2 For example, the connecting frame 12 is also provided with a mounting base 124. The mounting base 124 can be fixed to one of the two diagonal bars 122. The motor of the cooling fan 13 can be fixed to the mounting base 124 by screws to be fixedly connected to the connecting frame 12. When the cooling fan 13 needs to be inspected or replaced, the cooling fan 13 can be removed from the mounting base 124.

[0034] In this embodiment, by installing a cooling fan 13 fixed to the connecting frame 12 in the drive axle ventilation system 10, compared to the centralized cooling air source used in traditional dump trucks, airflow can be independently provided for the motor body 112 inside the drive axle body 11 for cooling and ventilation. The airflow can be adjusted individually for the drive axle body 11, preventing energy waste. Furthermore, since the cooling fan 13 is fixedly connected to the connecting frame 12, it remains relatively stationary with respect to the connecting frame 12 and the drive axle body 11 during vehicle operation, thus avoiding the fatigue damage caused by the reciprocating motion of the air ducts in traditional air-cooled systems.

[0035] In some embodiments, the drive axle ventilation system 10 further includes a temperature detection component and a control component. The temperature detection component is disposed within the motor body 112, and the control component is electrically connected to both the temperature detection component and the cooling fan 13. The control component controls the rotational speed of the cooling fan 13 based on the detection data from the temperature detection component. The temperature detection component includes, for example, a temperature sensor, specifically, a stator 1121 corresponding to the motor body 112 (see reference). Figure 2The system includes stator temperature sensors and bearing temperature sensors. In some embodiments, the temperature detection assembly is located on the stator coil. The control assembly, such as a motor controller, is located outside the drive axle body, for example on the frame of a dump truck. It can control the speed of the cooling fan 13 based on the temperature of the motor body 112 measured by the temperature sensors. For example, when the temperature of the motor body 112 is detected to rise, the speed of the cooling fan 13 is increased to provide a larger airflow; when the temperature is detected to decrease, the speed of the cooling fan 13 is decreased. This provides an appropriate airflow, ensuring good heat dissipation while avoiding energy waste. For two motor bodies 112 within the same drive axle body 11, the speed of the cooling fan 13 can be adjusted according to the one with the higher temperature. Independent adjustment can be achieved, resulting in energy savings.

[0036] In some embodiments, refer to Figure 4 and Figure 5 A ventilation duct 121 is formed within the connecting frame 12, and the air outlet of the cooling fan 13 is connected to the first ventilation opening 113 through the ventilation duct 121. In this embodiment, by utilizing the internal cavity of the connecting frame 12 as a channel for airflow transmission, there is no need to separately install a duct connecting the cooling fan 13 and the first ventilation opening 113, which can save duct material and space, and also avoid duct vibration fatigue damage. Specifically, refer to... Figure 4 The connecting frame 12 has ventilation ducts 121 in the two diagonal rods 122, and two first ventilation ports 113 are also provided on the corresponding drive axle body 11, which can provide ventilation and heat dissipation for the two motor bodies 112 respectively. In some embodiments, the connecting frame 12 also includes a crossbar 123 connected between the two diagonal rods 122. The crossbar 123 is also a hollow structure, and its internal space is connected to the ventilation ducts 121 in the two diagonal rods 122 respectively. The air outlet of the cooling fan 13 is connected to the crossbar 123 and is connected to the internal space of the crossbar 123. The crossbar 123 can divide the airflow blown by the cooling fan 13 into two paths that enter the two first ventilation ports 113 respectively, so as to achieve good heat dissipation for the two motor bodies 112.

[0037] In some embodiments, refer to Figure 4 and Figure 5 A heat dissipation gap 115 is formed between each motor body 112 and the inner wall of the drive axle housing 114, communicating with the first vent 113. The drive axle housing 114 also includes a second vent 117 (see reference). Figure 1 The rotor internal clearance 1122 of the motor body 112 connects to the heat dissipation clearance 115 and the second vent 117. (See reference...) Figure 5The dashed arrows indicate the airflow direction into the drive axle housing 114. The airflow enters the drive axle housing 114 through the first vent 113, flows along the heat dissipation gap 115 outside the motor body 112, then passes through the rotor inner gap 1122 inside the motor body 112, and finally exits the drive axle housing 114 through the second vent 117. In this way, the airflow blown by the cooling fan 13 can flow through both the inside and outside of the motor body 112, allowing for more thorough heat exchange and improving heat dissipation efficiency.

[0038] In some embodiments, a spacer 1141 is formed within the drive axle housing 114 between two motor bodies 112, and a heat dissipation gap 115 is located on the side of the corresponding motor body 112 away from the spacer 1141 and is separated from the spacer 1141. For example, Figure 5 Corresponding to the left side of the motor body 112, the heat dissipation gap 115 is located to the left of the interval space 1141, which is also the left side of the motor body 112. The second vent 117 is located between the two motor bodies 112 and communicates with the rotor inner gap 1122 in each of the two motor bodies 112 through the interval space 1141. In some embodiments, the end caps at both ends of the stator 1121 of the motor body 112 are provided with openings so that the heat dissipation gap 115 communicates with the rotor inner gap 1122, and the interval space 1141 communicates with the rotor inner gap 1122. Specifically, each first vent 113 can be set between the two ends of the corresponding motor body 112. The ends of the two motor bodies 112 that are close to each other are sealed to the inner wall of the drive axle housing 114, and the ends of the two motor bodies 112 that are far apart from each other are spaced apart from the inner wall of the drive axle housing 114. This structure ensures that after entering the drive axle housing 114 from the first vent 113, the airflow only flows along the heat dissipation gap 115 to the ends of the two motor bodies 112 that are far apart from each other, and then enters the interval space 1141 through the rotor inner gap 1122. Instead, it cannot directly enter the interval space 1141 from the first vent 113, which ensures a longer airflow path and guarantees the heat dissipation effect.

[0039] In some embodiments, refer to Figure 3 and Figure 4 The drive axle housing 114 includes an intermediate section 1142 and two end sections 1143 located at opposite ends of the intermediate section 1142. Figure 3Only one end segment 1143 is shown, and the two motor bodies 112 are located at opposite ends of the middle segment 1142. The connecting bracket 12 is connected to the middle segment 1142. Specifically, the two motor bodies 112 can be located within the two end segments 1143, or between the two end segments 1143 and the middle segment 1142. In this embodiment, by setting the drive axle housing 114 as a three-section structure with one middle segment 1142 and two end segments 1143, the motor bodies 112 can be more easily removed from the drive axle housing 114, facilitating inspection and maintenance.

[0040] Specifically, in some embodiments, such as Figure 4 and Figure 5 As shown, the intermediate section 1142 and the two end sections 1143 together form the motor mounting cavity 111. Each motor body 112 has a portion located within the intermediate section 1142 and another portion within the corresponding end sections 1143. Specifically, each motor body 112 is surrounded by a flange. The flanges on the intermediate section 1142 and the corresponding end sections 1143 clamp the flange on the motor body 112, thus fixing the motor body 112 between the intermediate section 1142 and the end sections 1143. Multiple through holes are provided between the flange on the outside of the motor body 112 and the stator 1121 of the motor body 112, allowing the heat dissipation gaps 115 on both sides of the flange to connect.

[0041] In some embodiments, refer to Figure 3 The motor mounting cavity 111 is formed within the two end sections 1143, which are integrally formed with the stator 1121 of the motor body 112. Specifically, the two end sections 1143 can serve as the outer shell of the stator 1121. That is, the two end sections 1143 serve as part of the drive axle housing 114 and part of the motor body 112, eliminating the need for a separate housing layer, saving radial space, and making the structure more compact.

[0042] Reference Figure 6 This utility model embodiment also provides an electric wheel dump truck 100, including the aforementioned drive axle ventilation system 10. The drive axle body 11 is, for example, the rear axle of the electric wheel dump truck 100. The electric wheel dump truck 100 can have multiple drive axles, and a drive axle ventilation system 10 can be provided for each drive axle to achieve independent ventilation and heat dissipation for each drive axle. (Refer to...) Figure 6 The electric wheel dump truck also includes a frame 20, and the end of the connecting frame 12 in the drive axle ventilation system 10 away from the drive axle body 11 is connected to the frame 20. The electric wheel dump truck 100 provided in this embodiment of the utility model also includes, for example, a driver's cab assembly, a cargo box, a generator, a battery, etc., which can be understood and set with reference to traditional electric wheel dump trucks, and will not be described in detail here.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A drive axle ventilation system (10), characterized in that, include: The drive axle body (11) includes a motor mounting cavity (111) and a motor body (112) disposed in the motor mounting cavity (111); the drive axle body (11) is also provided with a first ventilation opening (113) communicating with the motor mounting cavity (111); The connecting frame (12) is connected at one end to the drive axle body (11) and at the other end to the vehicle frame. A cooling fan (13) is fixedly connected to the connecting frame (12), and the air outlet of the cooling fan (13) is connected to the first ventilation port (113).

2. The drive axle ventilation system (10) as described in claim 1, characterized in that, A ventilation duct (121) is formed inside the connecting frame (12), and the air outlet of the cooling fan (13) is connected to the first ventilation port (113) through the ventilation duct (121).

3. The drive axle ventilation system (10) as described in claim 1, characterized in that, The drive axle body (11) includes a drive axle housing (114), and the motor mounting cavity (111) is formed inside the drive axle housing (114); a heat dissipation gap (115) communicating with the first vent (113) is formed between the motor body (112) and the inner wall of the drive axle housing (114); the drive axle housing (114) also includes a second vent (117); the rotor inner gap (1122) of the motor body (112) communicates between the heat dissipation gap (115) and the second vent (117).

4. The drive axle ventilation system (10) as described in claim 3, characterized in that, The number of motor bodies (112) is two; a space (1141) is formed in the drive axle housing (114) between the two motor bodies (112); the heat dissipation gap (115) is located on the side of the corresponding motor body (112) away from the space (1141) and is separated from the space (1141); the second vent (117) is located between the two motor bodies (112) and communicates with the rotor inner gap (1122) in the two motor bodies (112) through the space (1141).

5. The drive axle ventilation system (10) as described in claim 3, characterized in that, The number of motor bodies (112) is two; the drive axle housing (114) includes a middle section (1142) and two end sections (1143) located at opposite ends of the middle section (1142), and the two motor bodies (112) are respectively located at opposite ends of the middle section (1142); the connecting frame (12) is connected to the middle section (1142).

6. The drive axle ventilation system (10) as described in claim 5, characterized in that, The middle section (1142) and the two end sections (1143) together form the motor mounting cavity (111). Each motor body (112) has a portion located in the middle section (1142) and another portion located in the corresponding end section (1143).

7. The drive axle ventilation system (10) as described in claim 5, characterized in that, The motor mounting cavity (111) is formed within the two end sections (1143), and the two end sections (1143) are integrally formed with the stator (1121) of the motor body (112).

8. The drive axle ventilation system (10) as described in claim 2, characterized in that, The connecting frame (12) is an A-type frame.

9. The drive axle ventilation system (10) as described in claim 1, characterized in that, It also includes a temperature detection component and a control component. The temperature detection component is disposed inside the motor body (112). The control component is electrically connected to the temperature detection component and the cooling fan (13). The control component is used to control the speed of the cooling fan (13) according to the detection data of the temperature detection component.

10. An electric wheel dump truck (100), characterized in that, Includes the drive axle ventilation system (10) as described in any one of claims 1 to 9.

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