heat dissipating device

Abstract

The utility model relates to the technical field of heat dissipation discloses a kind of heat dissipation device, the heat dissipation device includes radiator, machine cover, fixed rack, torque transmission structure, heat dissipation fan and driving part, the machine cover is covered in the radiator, the fixed rack is installed to the radiator;The torque transmission structure is installed in the fixed rack;The heat dissipation fan is connected with the fixed rack by the torque transmission structure;The driving part is connected on the fixed rack, and the heat dissipation fan is drivingly connected by the torque transmission structure;The fixed rack, the torque transmission structure, the heat dissipation fan and the driving part are all located between the machine cover and the radiator.Therefore, the utility model will the axial thrust, radial bending moment and torque generated in the operation process of heat dissipation fan, and the impact load caused by whole machine vibration is applied to fixed rack by torque transmission structure.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology, specifically to a heat dissipation device. Background Technology

[0002] Small bulldozers have relatively low overall heat dissipation, and a direct-drive fan from the engine is generally sufficient to meet their cooling needs. Medium and large bulldozers have higher overall heat dissipation and often employ independent cooling systems, with their cooling fan 2a driven by a hydraulic motor 1a.

[0003] Currently, such as Figure 1 As shown, the hydraulic motor 1a is typically fixed to the motor bracket 3a, which is rigidly fixed inside the radiator or front hood. The cooling fan 2a is mounted on the conical surface 5a of the output shaft of the hydraulic motor 1a. The conical surface transmits power through a semi-circular key and is axially secured by a large nut 4a at the end of the output shaft.

[0004] However, the aforementioned installation method forces the output shaft of hydraulic motor 1a to simultaneously bear the axial thrust, radial bending moment, and torque from cooling fan 2a. Because medium and large bulldozers have high cooling power requirements, they are typically equipped with large-diameter, heavy-duty cooling fans 2a. Furthermore, the harsh working conditions of bulldozing result in excessive force exerted by cooling fan 2a on hydraulic motor 1a, leading to a persistently high failure rate for hydraulic motor 1a. Utility Model Content

[0005] This invention provides a heat dissipation device to solve the aforementioned technical problems.

[0006] This utility model provides a heat dissipation device, which includes a radiator, a mounting frame, a torque transmission structure, a shroud, a cooling fan, and a drive component. The shroud covers the radiator, and a heat dissipation space is formed inside the shroud. The mounting frame is installed to the radiator. The torque transmission structure is installed on the mounting frame. The cooling fan is connected to the mounting frame through the torque transmission structure. The drive component is connected to the mounting frame and is driven by the torque transmission structure. The mounting frame, the torque transmission structure, the cooling fan, and the drive component are all located within the heat dissipation space.

[0007] Based on the above structure, the drive component is indirectly connected to the cooling fan via a torque transmission structure. Since the torque transmission structure is connected to the radiator through a fixed frame, the axial thrust, radial bending moment, and torque generated by the cooling fan during operation, as well as the impact load caused by the vibration of the entire machine, can be directly applied to the fixed frame via the torque transmission structure and borne by the connection between the fixed frame and the radiator, thereby effectively reducing the overall stress applied to the drive component.

[0008] Optionally, the torque transmission structure includes a mounting base, a transmission part, and a connecting part. The mounting base is fixedly connected to the fixed frame. The transmission part is rotatably connected to the mounting base via a bearing assembly. The driving component is connected to the mounting base and is driven by the transmission part. The cooling fan is connected to the transmission part via the connecting part, so that when the driving component applies torque to the transmission part, the transmission part rotates relative to the mounting base, thereby driving the cooling fan to rotate synchronously via the connecting part, so as to achieve forced airflow to the radiator.

[0009] Optionally, the transmission unit includes a transmission shaft, which includes a first section and a second section sequentially along its axial direction. The first section is rotatably connected to the mounting base via the bearing assembly, and the end of the second section extends to the side of the mounting base near the cooling fan and is connected to the cooling fan via a connecting part. The driving member is mounted on the mounting base at a first port opposite to the cooling fan, and the driving end of the driving member extends into the mounting base through the first port opened on the mounting base and is drively connected to the end of the first section.

[0010] Optionally, the driving component includes a driving motor, the first end of the transmission shaft is provided with a connecting cavity, the driving end of the driving motor extends into the connecting cavity along the axial direction of the transmission shaft, and the driving end is connected to the transmission shaft via a spline.

[0011] Optionally, the drive shaft is provided with a lubrication cavity, which is located on the side of the connecting cavity away from the drive motor. The lubrication cavity is filled with a lubricating medium and communicates with the connecting cavity.

[0012] Optionally, the driving component further includes a sealing plate, one side surface of which abuts against the mounting base, and the sealing plate is fixedly connected to the mounting base by a first fixing member; The sealing plate is configured to seal the first port of the mounting base, the drive motor is disposed on the surface of the sealing plate opposite to the mounting base, the drive end of the drive motor extends through the sealing plate into the connecting cavity, and the connecting part includes a sealing structure for sealing the second port formed on the mounting base.

[0013] Optionally, the connecting part includes a rotating seat, the end of the second segment extends to the outside of the mounting seat through a second port formed on the mounting seat, the rotating seat is fixedly connected to the end of the second segment by a second fastener, and the cooling fan is fixedly connected to the rotating seat.

[0014] Optionally, the rotating seat includes a sealing portion, which covers the end of the mounting seat facing the cooling fan. The inner sidewall of the sealing portion is spaced apart from the outer sidewall of the mounting seat. A sealing ring is provided between the mounting seat and the rotating seat. The sealing ring is used to seal the gap between the mounting seat and the rotating seat, so as to form communication between the gap area and the second port of the mounting seat, i.e., the second port of the communicating cavity, thereby indirectly blocking the second port by blocking the gap area.

[0015] Optionally, the outer peripheral surface of the second segment extends radially outward along the drive shaft to form a support portion, and the rotating seat is fixedly connected to the support portion by a second fixing member so as to be connected to the drive shaft through the support portion.

[0016] Optionally, the heat dissipation device includes an air guide shroud covering the air outlet side of the cooling fan, a mounting bracket connected to the air guide shroud, the air guide shroud being connected to the inside of the housing, and / or the drive component, the mounting bracket, the torque transmission structure, and the cooling fan being arranged sequentially inside the housing along the airflow direction within the housing, and / or the heat dissipation device further includes a clamping component, the torque transmission structure being connected to the mounting bracket via the clamping component. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a structural diagram of the related technology; Figure 2 This is a schematic diagram of the structure of the heat dissipation device of this utility model installed on the heat sink; Figure 3 This is a three-dimensional structural diagram of the heat dissipation device of this utility model; Figure 4 This is a cross-sectional structural diagram of the heat dissipation device of this utility model; Figure 5 This is a cross-sectional schematic diagram of the torque transmission structure of this utility model.

[0019] Explanation of reference numerals in the attached figures: 1. Radiator; 101. Unit cover; 102. Air guide cover; 2. Fixing frame; 201. Connecting round rod; 202. Fixing cross plate; 203. Connecting rib plate; 204. Reinforcing round rod; 3. Cooling fan; 4. Driving components; 401. Drive motor; 402. Sealing plate; 403. Drive rod; 5. Torque transmission structure; 501. Mounting base; 5011. Transmission cavity; 5012. First connecting hole; 502. Bearing assembly; 503. Transmission part; 5031. Transmission shaft; 50311. First section; 50312. Second section; 50313. Connecting cavity; 50314. Lubrication cavity; 504. Connecting part; 5041. Rotating seat; 50411. Sealing part; 5042. Third connecting hole; 6. First fastener; 7. Second fastener; 8. Sealing ring; 9. Clamping component; 901. Clamping part; 10. Plunger. Detailed Implementation

[0020] 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. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] To address the aforementioned technical problems, this embodiment provides a heat dissipation device, referring to... Figure 2 , Figure 3 as well as Figure 4 The heat dissipation device includes a heat sink 1, a casing 101, a mounting bracket 2, a torque transmission structure 5, a cooling fan 3, and a drive component 4.

[0022] The radiator 1 is used to dissipate heat from the coolant in the bulldozer engine cooling system. In other words, when the coolant in the cooling system flows through the radiator 1, the heat is transferred to the heat sink fins of the radiator 1 through the metal thermal conductivity of the radiator 1, and then carried away by the airflow generated by the cooling fan 3, thereby achieving effective cooling of the coolant.

[0023] The mounting bracket 2 is mounted on the radiator 1; the torque transmission structure 5 is mounted on the mounting bracket 2. Thus, the cooling fan 3 is indirectly connected to the radiator 1 via the torque transmission structure 5 and the mounting bracket 2. The drive component 4 is connected to the mounting bracket 2 and drives the cooling fan 3 to rotate via the torque transmission structure 5.

[0024] Based on the above structure, the drive component 4 is indirectly connected to the cooling fan 3 through the torque transmission structure 5. Since the torque transmission structure 5 is connected to the radiator 1 through the fixed frame 2, most of the axial thrust, radial bending moment, and torque generated by the cooling fan 3 during operation, as well as the impact load caused by the vibration of the whole machine (hereinafter referred to as the comprehensive stress), can be applied to the fixed frame 2 through the torque transmission structure 5 and borne by the connection position between the fixed frame 2 and the radiator 1, thereby effectively reducing the comprehensive stress applied to the drive component 4.

[0025] Therefore, this embodiment is different from the previous one. Figure 1 The technologies demonstrated can prevent the output end of the drive component 4 from deforming due to excessive force, significantly reduce the failure rate of the drive component 4, and improve the reliability and service life of the heat dissipation system.

[0026] In this embodiment, the housing 101 covers one side of the heat sink 1, and a heat dissipation space is formed between the housing 101 and the heat sink 1. The aforementioned drive component 4, fixing frame 2, torque transmission structure 5 and cooling fan 3 can all be arranged in the heat dissipation space. That is, the fixing frame 2, the torque transmission structure 5, the cooling fan 3 and the drive component 4 are all located between the heat sink 1 and the housing 101.

[0027] refer to Figure 2 and Figure 4 The drive component 4, the fixing frame 2, the torque transmission structure 5, and the cooling fan 3 are arranged sequentially inside the housing 101 along the airflow direction inside the housing 101, so that the airflow path is smoother when passing through the inside of the housing 101, thereby reducing the obstruction area of ​​the components on the airflow, reducing wind resistance loss, ensuring that the airflow can fully act on the radiator 1, and improving the heat dissipation efficiency.

[0028] As is well known, when the cooling fan 3 rotates, the linear velocity of the outer edge area of ​​its blades is relatively high, which can generate the main airflow. However, the area near the root of the blades has a relatively low linear velocity, resulting in a relatively weak airflow and even a local airflow blind zone. In this embodiment, the driving component 4 and the torque transmission structure 5 are reasonably arranged in the area corresponding to the root of the blades, thereby making full use of the low airflow area at this location. This avoids interference with the main airflow channel and reduces the impact on the heat exchange efficiency of the cooling device.

[0029] In one embodiment, reference Figure 3The fixing frame 2 includes connecting round rods 201, fixing cross plates 202, and reinforcing round rods 204. Two connecting round rods 201 can be provided, and the two connecting round rods 201 are arranged in parallel. The ends of the two connecting round rods 201 on the same side are respectively connected to each other by a fixing cross plate 202. The fixing cross plate 202 can be fixedly connected to the housing 101 by bolts or other suitable fixing structures. The torque transmission structure 5 is installed on the side of the two connecting round rods 201 away from the radiator 1 by clamping members 9.

[0030] Two reinforcing rods 204 are provided, with their axial directions perpendicular to the axial direction of the connecting rod 201, and located on both sides of the torque transmission structure 5, to enhance the overall structural strength and rigidity of the fixing frame 2.

[0031] In this embodiment, the clamping member 9 can adopt any suitable structural form. (See reference) Figure 3 The clamping member 9 includes a clamping plate, and clamping portions 901 are formed at both ends of the clamping plate along the axial direction of the reinforcing round rod 204. The two clamping portions 901 cooperate with the corresponding connecting round rod 201 to form a fixed structure.

[0032] The clamping plate can be fixedly connected to the mounting base. The clamping part 901 includes an arc-shaped plate, which is connected to the clamping plate, and its inner side has an arc-shaped surface that matches the outer peripheral surface of the connecting round rod 201.

[0033] The curved plate can be integrally formed with the clamping plate. The curved surface of the curved plate can be fixedly connected to the fixing frame 2 by welding.

[0034] Meanwhile, the fixing frame 2 structure in this embodiment can further reduce the obstruction to the airflow inside the hood 101.

[0035] To further enhance the connection strength between the end of the connecting rod 201 and the fixed horizontal plate 202, this embodiment can provide multiple connecting ribs 203 at equal intervals along the circumference of each connecting rod 201. The side of the connecting rib 203 is connected to the end of the connecting rod 201, and extends axially along the end of the connecting rod 201 to the fixed horizontal plate 202 and is connected to the fixed horizontal plate 202.

[0036] In this embodiment, the torque transmission structure 5 can have any suitable form. (See reference...) Figure 4In one embodiment, the torque transmission structure 5 includes a mounting base 501, a transmission part 503, and a connecting part 504. The mounting base 501 is fixedly connected to the fixing frame 2, and the transmission part 503 is rotatably connected to the mounting base 501 via a bearing assembly 502. That is, the mounting base 501 can be installed on the side of the clamping plate away from the fixing frame 2 by bolts or other suitable fixing methods.

[0037] Combination Figure 2 The mounting base 501 has a through-hole transmission cavity 5011. The transmission part 503 is rotatably disposed in the transmission cavity 5011 via a bearing assembly 502. Specifically, the outer circumferential surface of the outer ring of the bearing assembly 502 abuts against the inner wall surface of the mounting base 501, i.e., the inner wall surface of the transmission cavity 5011, and the transmission part 503 is connected to the inner ring of the bearing assembly 502. The driving member 4 is mounted on the mounting base 501 and is drively connected to the transmission part 503; the cooling fan 3 is connected to the transmission part 503 via the connecting part 504. When the driving member 4 applies torque to the transmission part 503, the transmission part 503 rotates relative to the mounting base 501, thereby driving the cooling fan 3 to rotate synchronously via the connecting part 504, so as to achieve forced airflow to the radiator 1.

[0038] In one embodiment, reference Figure 5 The transmission unit 503 includes a transmission shaft 5031, which includes a first section 50311 and a second section 50312 arranged sequentially along its axial direction. The first section 50311 is rotatably mounted in the mounting base 501 via the bearing assembly 502, so that the transmission shaft 5031 can rotate smoothly within the mounting base 501.

[0039] The end of the second segment 50312 can extend to the side of the mounting base 501 near the cooling fan 3 and is connected to the cooling fan 3 via the connecting part 504. Thus, the bearing assembly 502 constitutes a rotational support structure between the transmission part 503 and the mounting base 501, so that the combined stress generated by the rotation of the cooling fan 3 can be transmitted to the mounting base 501 through the bearing assembly 502, thereby avoiding the stress acting directly on the drive component 4.

[0040] The drive component 4 is installed at the end of the mounting base 501 away from the cooling fan 3, that is, at the first port of the transmission cavity 5011 away from the cooling fan 3. The drive end of the drive component 4 extends into the mounting base 501 through this first port formed on the mounting base 501 and is connected to the end of the first section 50311 of the transmission shaft 5031. This allows the drive component 4 to apply torque to the transmission shaft 5031 through its drive end when it is working, thereby driving the cooling fan 3 connected to the end of the second section 50312 to rotate synchronously, achieving efficient and stable cooling airflow output.

[0041] Understandably, during the rotation of the cooling fan 3, the combined stress generated by its rotation (including the radial bending moment caused by the fan's own weight, the axial thrust generated by the fan's rotation, and the impact load caused by the vibration of the entire machine) will be applied to the drive shaft 5031. Since the drive shaft 5031 is rotatably mounted in the mounting base 501 through the bearing assembly 502, the aforementioned loads will be transmitted to the mounting base 501 via the bearing assembly 502 and ultimately borne by the fixing frame 2.

[0042] In this process, the drive component 4 only needs to output rotational torque and does not directly bear the radial or axial loads during fan operation, thereby significantly reducing the mechanical stress on the output shaft of the drive component 4. Based on this structure, the vibration, impact, and aerodynamic forces generated by the cooling fan 3 during operation are absorbed by the bearing assembly 502 and the mounting base 501 and finally applied to the heat sink 1 via the fixing frame 2. Therefore, this embodiment can improve the operational reliability of the drive component 4 and extend the service life of the drive component 4 and the entire cooling system.

[0043] In one embodiment, the bearing assembly 502 may include multiple bearings, which may be spaced apart axially along the drive shaft 5031. The bearing types may include cylindrical bearings, tapered bearings, etc. The bearing assembly 502 may include one or more bearing types depending on the actual situation, such as using a combination of cylindrical bearings and tapered bearings.

[0044] In this embodiment, the transmission connection between the drive component 4 and the transmission shaft 5031 can adopt any suitable structure, as shown in the reference. Figure 4 and Figure 5 In one embodiment, the drive component 4 includes a drive motor 401. The end of the first section 50311 of the transmission shaft 5031 has a connecting cavity 50313. The drive end of the drive motor 401 extends into the connecting cavity 50313 along the axial direction of the connecting rod. The drive end is connected to the transmission shaft 5031 by a spline, that is, the drive end and the inner wall of the transmission shaft 5031 are connected by a spline so that when the drive end is driven to rotate, it can synchronously drive the transmission shaft 5031 to rotate, thereby applying torque to the cooling fan 3.

[0045] In this embodiment, the drive motor 401 may include any suitable type of motor such as a hydraulic motor, wherein the drive end is formed by the drive rod 403 of the hydraulic motor.

[0046] In one embodiment, the drive shaft 5031 has a lubrication cavity 50314 inside. The lubrication cavity 50314 is located on the side of the connecting cavity 50313 away from the drive motor 401. The lubrication cavity 50314 stores a lubricating medium and communicates with the connecting cavity 50313 so that the lubricating medium can flow into the connecting cavity 50313 to lubricate the spline structure between the drive end and the connecting cavity 50313.

[0047] At the same time, refer to Figure 3 and Figure 4 Since the spline structure between the drive end and the inner wall of the connecting cavity 50313 of the transmission shaft 5031 is not fully engaged, that is, there is a gap between the external spline on the drive end and the internal spline in the connecting cavity 50313, the lubricating medium flowing into the connecting cavity 50313 can also flow into the transmission cavity 5011 through these gaps to lubricate the bearing assembly 502.

[0048] In one embodiment, reference Figure 3 and Figure 4 The driving component 4 also includes a sealing plate 402, one periphery of which abuts against the mounting base 501, i.e., at the end of the transmission cavity 5011 away from the cooling fan 3. The sealing plate 402 is fixedly connected to the mounting base 501 by the first fixing member 6.

[0049] Specifically, the first fixing member 6 may include a fixing bolt. Correspondingly, the mounting base 501 is provided with a first connecting hole 5012. The fixing bolt passes through the sealing plate 402 and connects with the first connecting hole 5012 to fix the periphery of the sealing plate 402 to the end face of the first port of the transmission cavity 5011.

[0050] Furthermore, the surface of the sealing plate 402 facing the first port on the mounting base 501 completely covers the first port to seal it and prevent the lubricating medium flowing from the connecting cavity 50313 into the transmission passage cavity 5011 from leaking outward. The drive motor 401 is mounted on the side surface of the sealing plate 402 away from the mounting base 501, and its drive end passes through the sealing plate 402 and extends into the connecting cavity 50313, where it is connected to the spline structure.

[0051] Meanwhile, the connecting part 504 includes a sealing structure for blocking the second port formed on the mounting base 501, which is the port on the transmission cavity 5011 opposite to the first port. Thus, both ends of the transmission cavity 5011 are sealed, ensuring that the lubricating medium does not overflow to the outside of the torque transmission structure 5.

[0052] Based on the above structural design, the lubricating medium can simultaneously lubricate the spline meshing part and the bearing assembly 502, significantly reducing the frictional resistance and wear rate between the various transmission parts 503, and improving the smoothness of torque transmission and mechanical transmission efficiency.

[0053] The lubricating medium can be lubricating oil, lubricating grease, or other media with lubricating properties. It can also be selected based on the actual operating environment and the operating temperature of the heat dissipation device.

[0054] In one embodiment, reference Figure 5 The end of the second segment 50312 of the transmission rod extends to the outside of the second port of the mounting base 501, i.e., the second port of the transmission cavity 5011, through a second port formed on the mounting base 501, so as to facilitate the installation of the connecting part 504. The connecting part 504 includes a rotating seat 5041, which is fixedly connected to the end of the second segment 50312 by a second fixing member 7. The cooling fan 3 is fixedly connected to the rotating seat 5041, so that when the transmission rod rotates, the cooling fan 3 can be driven to rotate synchronously via the rotating seat 5041.

[0055] Further, refer to Figure 5 The rotating seat 5041 includes a sealing portion 50411, which covers the end of the mounting base 501 facing the cooling fan 3. The inner sidewall of the sealing portion 50411 is spaced apart from the outer sidewall of the mounting base 501, and a sealing ring 8 is provided between them.

[0056] The sealing ring 8 is used to seal the gap between the mounting base 501 and the rotating base 5041 to prevent external dust, moisture, and other impurities from entering the gap, thereby avoiding increased resistance when the rotating base 5041 rotates relative to the mounting base 501. It also serves to block the transmission cavity 5011. In other words, the sealing portion 50411, the sealing ring 8, and the outer peripheral surface of the mounting base 501 covered by the sealing portion 50411 together constitute the sealing structure.

[0057] It is understandable that, such as Figure 5 As shown, a bearing assembly 502 is provided between the transmission rod and the transmission cavity 5011. To avoid direct friction between the outer circumferential surface of the transmission rod and the inner wall of the transmission cavity 5011, an appropriate gap is usually maintained between them. Thus, the gap area between the sealing part 50411 and the mounting base 501 communicates with the second port of the mounting base, i.e., the second port of the transmission cavity 5011, thereby indirectly sealing the second end of the transmission cavity 5011.

[0058] In one embodiment, reference Figure 5 The outer circumferential surface of the second segment 50312 of the transmission rod extends outward along the radial direction of the transmission rod, that is, the outer diameter of the second segment 50312 is larger than the outer diameter of the first segment 50311, thereby forming a support portion by enlarging the end face of the second segment 50312. The transmission seat abuts against the support portion and is fixedly connected to the support portion by the second fixing member 7.

[0059] Specifically, the second fixing member 7 can adopt a bolt connection structure, with the bolts passing through the fourth connecting hole opened on the transmission seat and the support and being threaded to them in sequence, so as to achieve reliable fixing of the rotating seat 5041 and the support.

[0060] It should be noted that the reference Figure 5 The outward expansion design of the outer circumference of the second section 50312 not only provides a larger installation space to facilitate the assembly of the rotating seat 5041, but also reduces the gap between its outer circumference and the inner wall of the transmission cavity 5011. This increases the flow resistance of the lubricating medium when it flows into the space between the mounting seat 501 and the rotating seat 5041, thereby slowing down the flow speed of the lubricating medium and helping to form a stable lubricating oil film in this area, further improving the sealing performance and lubrication durability.

[0061] In one embodiment, the heat dissipation device further includes an air guide shroud 102, which covers the exhaust side of the cooling fan 3. The mounting bracket 2 is installed on the air guide shroud 102, which is then fixedly connected inside the casing 101, thereby enabling the entire heat dissipation device to be installed on the casing 101. The fixing cross plates 202 of the mounting bracket 2 are all connected to the air guide shroud 102 to enhance overall installation stability.

[0062] In one embodiment, the lubrication cavity 50314 is axially extending through the transmission rod at one end opposite to the connecting cavity 50313. The rotating seat 5041 has an injection through-hole communicating with the lubrication cavity 50314 for injecting lubricating medium into the lubrication cavity 50314. A plunger 10 can be inserted into the end of the injection through-hole opposite to the lubrication cavity 50314 to seal the injection through-hole and prevent leakage of lubricating medium. It should be noted that since the rotating seat 5041 abuts against the end of the second section 50312 of the transmission rod, it also seals the opening of the lubrication cavity 50314 facing the cooling fan 3, thus forming a closed lubrication circuit in the structure.

[0063] In this embodiment, the mounting base 501 can have any suitable structural form, such as a columnar structure; the transmission cavity 5011 extends along the axial direction of the mounting base 501 and is coaxially arranged with the mounting base 501. The rotating seat 5041 can also have any suitable form, such as including a circular plate structure, the center line of the circular plate being collinear with the axial direction of the transmission rod. The periphery of the circular plate on the side away from the cooling fan 3 extends towards the mounting base 501 to form a sealing portion 50411 that can be fitted onto the end of the mounting base 501. The sealing portion 50411 has a third connecting hole 5042, as shown in the reference. Figure 4 The cooling fan 3 can be fixedly connected to the rotating seat 5041 by bolts passing through the third connecting hole 5042.

[0064] Furthermore, the drive shaft and transmission rod of the hydraulic motor are coaxially arranged, and the center line of the cooling fan 3 and the circular plate are also coaxially arranged. Based on this, the drive shaft, transmission shaft 5031, and cooling fan 3 are arranged coaxially, thereby ensuring symmetrical torque transmission path, good rotational balance, reducing eccentric vibration and energy loss, and improving the operating stability and transmission efficiency of the cooling fan 3.

[0065] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A heat dissipation device, characterized in that, include: Radiator (1), A cover (101) is provided on one side of the radiator (1); A mounting bracket (2) is installed inside the machine cover (101); Torque transmission structure (5), the torque transmission structure (5) is mounted on the fixing frame (2); Cooling fan (3), the cooling fan (3) is connected to the fixing frame (2) through the torque transmission structure (5); The driving component (4) is connected to the fixed frame (2) and is connected to the cooling fan (3) through the torque transmission structure (5). The fixing frame (2), the torque transmission structure (5), the cooling fan (3) and the driving component (4) are all located between the heat sink (1) and the casing (101).

2. The heat dissipation device according to claim 1, characterized in that, The torque transmission structure (5) includes a mounting base (501), a transmission part (503), and a connecting part (504). The mounting base (501) is fixedly connected to the fixing frame (2). The transmission part (503) is rotatably connected to the mounting base (501) through a bearing assembly (502). The driving component (4) is connected to the mounting base (501) and is connected to the transmission part (503) in a transmission manner. The cooling fan (3) is connected to the transmission part (503) through the connecting part (504).

3. The heat dissipation device according to claim 2, characterized in that, The transmission unit (503) includes a transmission shaft (5031), which includes a first section (50311) and a second section (50312) sequentially along its axial direction. The first section (50311) is rotatably connected to the mounting base (501) via the bearing assembly (502). The end of the second section (50312) extends to the side of the mounting base (501) near the cooling fan (3) and is connected to the cooling fan (3) via a connecting part (504). The drive component (4) is installed on the mounting base (501) at one end away from the cooling fan (3). The drive end of the drive component (4) extends into the mounting base (501) through the first port opened on the mounting base (501) and is connected to the end of the first segment (50311) in a transmission connection.

4. The heat dissipation device according to claim 3, characterized in that, The drive component (4) includes a drive motor (401), and the first section (50311) of the transmission shaft (5031) is provided with a connecting cavity (50313). The drive end of the drive motor (401) extends into the connecting cavity (50313) along the axial direction of the transmission shaft (5031), and the drive end is splinedly connected to the transmission shaft (5031).

5. The heat dissipation device according to claim 4, characterized in that, The drive shaft (5031) is provided with a lubrication cavity (50314), which is located on the side of the connecting cavity (50313) away from the drive motor (401). The lubrication cavity (50314) is filled with a lubricating medium and is connected to the connecting cavity (50313).

6. The heat dissipation device according to claim 5, characterized in that, The driving component (4) further includes a sealing plate (402), one side surface of the sealing plate (402) abuts against the mounting base (501), and the sealing plate (402) is fixedly connected to the mounting base (501) by a first fastener (6); The sealing plate (402) is configured to seal the first port of the mounting base (501), the drive motor (401) is disposed on the surface of the sealing plate (402) facing away from the mounting base (501), the drive end of the drive motor (401) extends through the sealing plate (402) into the connecting cavity (50313), and the connecting part (504) includes a sealing structure for sealing the second port formed on the mounting base (501).

7. The heat dissipation device according to any one of claims 3-6, characterized in that, The connecting part (504) includes a rotating seat (5041), the end of the second segment (50312) extends to the outside of the mounting seat (501) through a second port formed on the mounting seat (501), the rotating seat (5041) and the end of the second segment (50312) are fixedly connected by a second fastener (7), and the cooling fan (3) is fixedly connected to the rotating seat (5041).

8. The heat dissipation device according to claim 7, characterized in that, The rotating seat (5041) includes a sealing portion (50411), which covers the end of the mounting seat (501) facing the cooling fan (3). The inner sidewall of the sealing portion (50411) is spaced apart from the outer sidewall of the mounting seat (501). A sealing ring (8) is provided between the mounting seat (501) and the rotating seat (5041), which is used to seal the gap between the mounting seat (501) and the rotating seat (5041).

9. The heat dissipation device according to claim 7, characterized in that, The outer peripheral surface of the second segment (50312) extends radially outward along the drive shaft (5031) to form a support portion, and the rotating seat (5041) is fixedly connected to the support portion by the second fastener (7).

10. The heat dissipation device according to claim 1, characterized in that, The heat dissipation device includes an air guide shroud (102) which covers the air outlet side of the cooling fan (3). The mounting bracket (2) is connected to the air guide shroud (102), and the air guide shroud (102) is connected inside the casing (101); and / or, The drive component (4), the mounting bracket (2), the torque transmission structure (5), and the cooling fan (3) are arranged sequentially inside the housing (101) along the airflow direction within the housing (101); and / or, The heat dissipation device also includes a clamping member (9), and the torque transmission structure (5) is connected to the fixing frame (2) through the clamping member (9).

Images