Heat dissipation type fan clutch assembly capable of avoiding dust accumulation

Abstract

The invention belongs to the technical field of clutches, and particularly relates to a heat dissipation type fan clutch assembly capable of avoiding dust accumulation. The tops of the driving shafts at the two ends are fixedly connected with a driving plate, the driving shafts are rotationally sleeved with a rear cover, the driving plate is contained in a space between the rear cover and a front cover which are connected in a sealed mode, an oil storage cavity is defined by the top face of the driving plate and the inner wall of the front cover, and multiple concentric circular ring teeth are arranged on the end face, close to the outer edge, of the driving plate. The circular ring teeth on the upper end face and the lower end face are contained in the corresponding front cover tooth grooves and the corresponding rear cover tooth grooves and define meshing cavities, an oil inlet channel communicated with the meshing cavities is formed in the driving plate, and an oil return channel communicated with the meshing cavities and the oil storage cavity is formed in the front cover. According to the invention, accumulated dust and greasy dirt at the joint of the shell and the rear cover body can be automatically cleaned in real time; the rotating stability of the driving shaft can be improved; and oil pollution and tooth groove blockage caused by entering of external impurities can be reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of clutches, and particularly relates to a dust-accumulation-avoiding heat-dissipating fan clutch assembly. BACKGROUND

[0002] The fan clutch is a key component in the modern automobile engine thermal management system, and its core function is to automatically adjust the working state of the cooling fan according to the engine thermal condition, so as to reduce the fan power consumption, reduce fuel consumption and control the running noise on the premise of ensuring that the engine is not overheated. The silicon oil fan clutch is the most widely used technical solution at present, and its working principle is to use the shear viscosity of high-viscosity silicon oil to transmit torque. The typical silicon oil fan clutch structure includes a driving shaft driven by an engine, a driving plate, an oil storage cavity for storing silicon oil, and a front cover and a rear cover connected to fan blades. When the engine coolant temperature is low, the silicon oil in the oil storage cavity is closed by the control valve piece, and cannot enter the working cavity between the driving plate and the housing, so the clutch is in a separated state, and the fan operates at a low speed. When the temperature rises, the bimetallic temperature sensor deforms and drives the control valve piece to open the oil inlet hole, and the silicon oil enters the working cavity, and uses its high viscosity to transmit the torque of the driving plate to the housing, thereby driving the fan to rotate at high speed for heat dissipation.

[0003] A positive and negative rotation dual-purpose silicon oil fan clutch is disclosed in Chinese Patent No. CN202110057426.0, which comprises a main shaft connected to an engine output shaft through bolts, a main plate connected to the main shaft in an interference manner, a driven housing formed by a front cover and a housing assembly connected through bolts, an oil outlet channel and an oil return channel provided on the main plate, one end of the oil outlet channel and the oil return channel being communicated with an oil storage cavity, and the communicated part being provided as an oil outlet, and the medium in the oil storage cavity being silicon oil; the main shaft and the main plate are driven to rotate synchronously by the engine output shaft, and the main plate and the main shaft are driven to rotate synchronously by the silicon oil viscosity to drive the driven housing to rotate asynchronously, so that there is a speed difference between the main plate and the driven housing; the other end of the oil outlet channel and the oil return channel is connected with an oil scraping pool, and the other ends of the oil outlet channel and the oil return channel are further provided with a working cavity. The application eliminates the safety hazards of the product in product matching, experiment, operation and the like by setting the main shaft to rotate in a forward or reverse direction without rigidly requiring the rotation direction of the main shaft.

[0004] However, the existing fan clutch often has the following shortcomings: the driving plate drives the sealing structure composed of the cover body and the front cover of the rear cover through the shearing force of the silicone oil in the meshing cavity, and the shell of the rear cover is not rotating, so the junction of the shell and the cover body is easy to accumulate dust and oil stains, and the device is stuck due to long-term static or dust accumulation; the additional valve plate and other components are arranged on the side of the driving plate, which makes the ordinary fan clutch often set the side of the driving plate as a structure for installing the protruding valve plate, and the valve plate needs to be separately provided with a fixing structure, which causes the structure of the driving plate of the ordinary fan clutch to be asymmetric, affecting the stability of rotation; the additional valve plate and other components are arranged on the side of the driving plate, and the coil and the wire connected with the valve plate are separately punched into the oil storage cavity, so that the oil storage cavity cannot be completely closed, and external impurities entering easily cause oil pollution, tooth groove blockage and mechanical wear. SUMMARY

[0005] In order to solve the problems in the prior art, the application provides a dust-avoiding heat-dissipating fan clutch assembly.

[0006] In order to achieve the above purpose, the application adopts the following technical scheme: A dust-avoiding heat-dissipating fan clutch assembly, comprising a driving shaft, the top of the driving shaft is fixedly connected with a driving plate, a rear cover is rotatably sleeved on the driving shaft, the driving plate is accommodated in the space between the rear cover and a front cover connected in a sealed manner, the top surface of the driving plate and the inner wall of the front cover form an oil storage cavity, the end surface of the driving plate near the outer edge has a plurality of concentric ring teeth, the ring teeth on the upper and lower end surfaces are accommodated in the corresponding front cover tooth groove and rear cover tooth groove and form a meshing cavity, an oil inlet channel is formed in the driving plate and communicated with the meshing cavity, an oil return channel is formed in the front cover and communicated with the meshing cavity and the oil storage cavity. A valve rod assembly penetrates the central axis of the driving shaft, the sliding rod of the valve rod assembly is slidingly connected in the sliding groove formed in the center of the driving shaft, one end of the sliding rod is fixedly connected with a chuck, the chuck is clamped with an electromagnet, the bottom of the driving shaft is provided with a column groove, the chuck and the electromagnet are accommodated in the column groove, the other end of the sliding rod is fixedly connected with a stop disc, one end of the valve rod is fixedly connected to the side surface of the stop disc, the other end of the stop disc and the other end of the valve rod are opposite to the inlet of the oil inlet channel, and the opening and closing of the inlet of the oil inlet channel are controlled by the up-down sliding of the valve rod.

[0007] Further, the rear cover comprises a cover body, the top of the cover body is in close connection with the front cover, the bottom of the cover body is rotationally connected with a shell, the shell contains an electromagnetic coil, and the electromagnetic coil is wound on the driving shaft. The outer wall of the cover body is fixedly connected with a wire assembly which is electrically connected with the electromagnetic coil.

[0008] Further, the wire assembly comprises a socket and a wire, and the wire is electrically connected with the electromagnetic coil through the socket. When the electromagnetic coil is powered, the electromagnet on the chuck is subjected to repulsion, and drives the valve rod assembly to slide away from the front cover, and the other end of the valve rod is tightly combined to the inlet of the oil inlet channel, and the oil storage cavity is separated from the oil inlet channel.

[0009] Further, the valve rod assembly comprises a reset spring, one end of the reset spring is fixedly connected to the inner wall of the bottom of the front cover, and the other end of the reset spring is fixedly connected to one side of the back of the baffle plate away from the sliding rod. When the electromagnetic coil is powered off, the compressed reset spring is elongated, and pushes the valve rod assembly to slide towards the front cover, and the valve rod is opened at the combined place of the oil inlet channel, and the oil storage cavity is communicated with the oil inlet channel.

[0010] Further, the valve rod assembly comprises a dust removal sliding sleeve and a connecting rod, the dust removal sliding sleeve is located directly below the shell and is sleeved on the outer wall of the driving shaft, a through hole is formed in the side wall of the driving shaft, and the connecting rod passes through the through hole and is fixedly connected to the chuck and the inner wall of the dust removal sliding sleeve.

[0011] Further, the shell contains a first bearing, the cover body contains a second bearing, the driving shaft is inserted into the first bearing and the second bearing, the second bearing is located below the driving plate, and the electromagnetic coil is located between the first bearing and the second bearing.

[0012] Further, a limiting piece which matches the profile of the abutting part is installed between the driving plate and the second bearing, between the second bearing and the electromagnetic coil, between the electromagnetic coil and the first bearing, and between the first bearing and the bottom surface of the shell.

[0013] Further, an oil passing groove is formed in the end surface of the driving plate, and the oil passing groove is communicated with the meshing cavities on both sides of the upper and lower end surfaces of the driving plate.

[0014] Further, the oil storage cover is fixedly connected to the end surface of the driving plate close to the front cover, and the oil storage cover is located inside the circular ring teeth.

[0015] Further, the sliding slot formed in the central axis of the driving shaft and the cross section of the sliding rod are both square, and the sliding rod slides in the sliding slot of the central axis of the driving shaft without rotating.

[0016] Compared with the prior art, the present application has the following beneficial effects: (1) In this invention, the dust and oil stains at the junction of the housing and the rear cover can be cleaned automatically in real time, reducing the obstruction of dust and oil stains during the clutch operation. During the clutch operation, the active plate drives the sealing structure composed of the rear cover and the front cover to rotate through the shearing force of the silicone oil in the meshing cavity. Moreover, the housing of the rear cover does not rotate, so dust and oil stains are easy to accumulate at the junction of the housing and the cover. The dust removal sliding sleeve is located directly below the housing and is slidably sleeved on the outer wall of the active shaft. Under the drive of the connecting rod, the dust removal sliding sleeve will slide along the length direction of the active shaft at the same time as the sliding rod. The sliding of the dust removal sliding sleeve can scrape and clean the junction of the housing and the cover and the outer wall of the active shaft exposed to the outside. Therefore, while operating the valve stem assembly to realize the connection and separation of the oil inlet channel and the oil storage chamber, the valve stem assembly also drives the dust removal sliding sleeve to clean the junction of the housing and the cover, realizing dynamic self-cleaning of the easily dusty parts, preventing equipment jamming caused by long-term static or dust accumulation, improving rotation efficiency and reducing energy consumption.

[0017] (2) This invention improves the stability of the drive shaft during rotation. During operation, the drive shaft is driven to rotate by the engine belt. The drive shaft drives the drive plate, which has a completely centrally symmetrical structure, to rotate in the intermediate cavity formed by the sealed connection of the rear cover and the front cover. When the drive plate rotates, the drive plate, the rear cover, and the front cover are spaced apart from each other. The gap space formed by the annular teeth on the upper and lower end faces of the drive plate, the tooth grooves of the rear cover, and the tooth grooves of the front cover forms the meshing cavity. When the meshing cavity is filled with silicone oil, the torque of the drive plate rotation is transmitted to the rear cover and the front cover through the shear force of the silicone oil. Unlike ordinary fan clutches, which often require control of the silicone oil flow into the meshing cavity, this invention improves the stability of the drive shaft during rotation. The active plate has additional valves and other components on its side. This makes it common for ordinary fan clutches to have one side of the active plate designed to accommodate the extended valves. The valves require a separate fixing structure, resulting in an asymmetrical active plate structure in ordinary fan clutches. In this invention, the valve stem used to control the opening and closing of the silicone oil inlet and outlet channels is fixedly connected to the baffle plate. Both the baffle plate and the valve stem are completely housed within the oil reservoir. The baffle plate and the valve stem move up and down by sliding a sliding rod that is embedded in the central groove of the active shaft, thereby opening and closing the oil inlet channel. This allows the active plate to be a completely centrally symmetrical structure, increasing stability during rotation.

[0018] (3) The present invention achieves a fully sealed structure for the fan clutch assembly, effectively isolating it from external dust and moisture contamination. Because ordinary fan clutches often require additional valve plates and other components to be installed on the side of the drive plate when controlling the flow of silicone oil into the engagement chamber, and the coils and wires electrically connected to the valve plates are separately inserted into the oil storage chamber. However, in the present invention, when it is necessary to control the sliding rod to slide in the central groove of the drive shaft, the electromagnetic coil located in the housing is directly energized. The electromagnet located in the groove at the end of the drive shaft away from the rear cover is subjected to repulsive force, which drives the valve rod assembly to slide away from the front cover. The other end of the valve rod is tightly attached to the inlet of the oil inlet channel. The oil reservoir is separated from the oil inlet channel. When the electromagnetic coil is de-energized, the compressed return spring extends, pushing the valve stem assembly to slide closer to the front cover. The valve stem opens at the point where it contacts the oil inlet channel, connecting the oil reservoir to the oil inlet channel. This controls the silicone oil to enter the oil inlet channel and engagement chamber for operation. There is no need to separately thread the coil and wires electrically connected to the valve plate into the oil reservoir. This completely isolates the core working areas inside the clutch, such as the engagement chamber and oil reservoir, from the outside. This design effectively prevents contaminants such as dust, mud, and moisture from entering the clutch, avoiding oil contamination, gear blockage, and mechanical wear caused by external impurities. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall cross-sectional structure of a heat-dissipating fan clutch assembly that avoids dust accumulation according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of a heat-dissipating fan clutch assembly that avoids dust accumulation according to the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the overall cross-sectional structure of a heat-dissipating fan clutch assembly that avoids dust accumulation according to the present invention. Figure 2 ; Figure 4 This is a partial cross-sectional schematic diagram of a heat-dissipating fan clutch assembly that avoids dust accumulation according to the present invention; Figure 5 This is a schematic diagram of the overall structure of a heat-dissipating fan clutch assembly that avoids dust accumulation according to the present invention. Figure 2 ; Figure 6 This is an exploded view of the overall structure of a heat-dissipating fan clutch assembly that avoids dust accumulation according to the present invention. Figure 7 This is a schematic diagram of a partially dispersed structure of a heat-dissipating fan clutch assembly that avoids dust accumulation, according to the present invention. Figure 1 ; Figure 8 This is a schematic diagram of a partially dispersed structure of a heat-dissipating fan clutch assembly that avoids dust accumulation, according to the present invention. Figure 2 ; Figure 9 This is a schematic diagram of a partially dispersed structure of a heat-dissipating fan clutch assembly that avoids dust accumulation, according to the present invention. Figure 3 .

[0020] The attached figures are labeled as follows: 100. Drive shaft; 101. Drive plate; 102. Circular ring gear; 103. Oil reservoir cap; 104. Oil inlet channel; 105. Through hole; 106. Column groove; 107. Oil passage groove; 200. Valve stem assembly; 201. Sliding rod; 202. Chuck; 203. Electromagnet; 204. Dust collector sliding sleeve; 205. Connecting rod; 206. Valve stem; 207. Baffle plate; 208. Return spring; 300. Rear cover; 301. Cover body; 302. Housing; 303. Rear cover tooth groove; 400. Front cover; 401. Oil return channel; 402. Oil reservoir; 403. Front cover tooth groove; 500. Electromagnetic coil; 600. Wiring assembly; 601. Socket; 602. Wire; 700. First bearing; 800, Second Bearing; 900. Engagement cavity. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0023] Example like Figures 1-9As shown, a heat-dissipating fan clutch assembly that avoids dust accumulation includes a drive shaft 100, a drive plate 101 fixedly connected to the top of the drive shaft 100, a rear cover 300 rotatably sleeved on the drive shaft 100, the drive plate 101 being housed in the space between the sealed rear cover 300 and the front cover 400, the top surface of the drive plate 101 and the inner wall of the front cover 400 forming an oil storage cavity 402, the end face of the drive plate 101 near the outer edge having multiple concentric annular teeth 102, the annular teeth 102 on the upper and lower end faces being housed in corresponding front cover tooth grooves 403 and rear cover tooth grooves 303 and mutually forming a meshing cavity 900, the drive plate 101 having an oil inlet channel 104 communicating with the meshing cavity 900, and the front cover 400 having an oil return channel 401 communicating with the meshing cavity 900 and the oil storage cavity 402 respectively. The valve stem assembly 200 passes through the central axis of the drive shaft 100. The sliding rod 201 of the valve stem assembly 200 is slidably connected to a groove opened in the center of the drive shaft 100. One end of the sliding rod 201 is fixedly connected to the chuck 202, and an electromagnet 203 is engaged on the chuck 202. A column groove 106 is opened at the bottom of the drive shaft 100, and the chuck 202 and the electromagnet 203 are both housed in the column groove 106. The other end of the sliding rod 201 is fixedly connected to the baffle 207. One end of the valve stem 206 is fixedly connected to the side of the baffle 207. The other end of the baffle 207 and the valve stem 206 are directly opposite the inlet of the oil inlet channel 104. The opening and closing of the inlet of the oil inlet channel 104 is controlled by the up and down sliding of the valve stem 206.

[0024] In this invention, the dust and oil stains at the joint between the housing 302 and the rear cover 300 cover 301 can be automatically cleaned in real time, reducing the obstruction caused by dust and oil stains during clutch operation. During clutch operation, the drive plate 101 drives the sealing structure composed of the rear cover 300 cover 301 and the front cover 400 to rotate through the shearing force of the silicone oil in the engagement cavity 900. However, the housing 302 of the rear cover 300 does not rotate, so dust and oil stains easily accumulate at the joint between the housing 302 and the cover 301. The dust removal sliding sleeve 204 is located directly below the housing 302 and is slidably sleeved on the outer wall of the drive shaft 100. Driven by the connecting rod 205, The dust removal sliding sleeve 204 slides along the length of the drive shaft 100 simultaneously with the sliding rod 201. The sliding of the dust removal sliding sleeve 204 can scrape and clean the joint between the housing 302 and the cover 301, as well as the outer wall of the drive shaft exposed to the outside. Therefore, while operating the valve stem assembly 200 to connect and separate the oil inlet channel 104 and the oil storage chamber 402, the valve stem assembly 200 also drives the dust removal sliding sleeve 204 to clean the joint between the housing 302 and the cover 301, realizing dynamic self-cleaning of easily dust-accumulated parts, preventing equipment jamming caused by long-term static placement or dust accumulation, improving rotation efficiency, and reducing energy consumption.

[0025] It is worth noting that through the precise design of the oil inlet channel 104 and the oil return channel 401, combined with the meshing cavity 900 formed by the multiple concentric ring teeth 102 and the front cover 400 and the rear cover 300, the silicone oil is guaranteed to form a stable circulation in the working area. When the silicone oil transmits torque through shear force in the meshing 900, it can evenly carry away the heat generated by friction and carry the heat back to the oil storage cavity 402 for dissipation through circulation, thus ensuring the thermal stability of the clutch under long-term high-load operation.

[0026] Furthermore, the rear cover 300 includes a cover body 301, the top of which is sealed to the front cover 400, and a housing 302 is rotatably connected to the bottom of the cover body 301. An electromagnetic coil 500 is housed in the housing 302 and is wound around the drive shaft 100. A wire assembly 600 electrically connected to the electromagnetic coil 500 is fixedly connected to the outer wall of the cover body 301.

[0027] Furthermore, the wiring assembly 600 includes a socket 601 and a wire 602, the wire 602 being electrically connected to the electromagnetic coil 500 via the socket 601. When the electromagnetic coil is energized, the electromagnet 203 on the chuck 202 experiences a repulsive force, causing the valve stem assembly 200 to slide away from the front cover 400, with the other end of the valve stem 206 tightly fitted to the inlet of the oil inlet channel 104, separating the oil storage chamber 402 from the oil inlet channel 104.

[0028] Furthermore, the valve stem assembly 200 includes a return spring 208, one end of which is fixedly connected to the inner wall of the bottom of the front cover 400, and the other end of which is fixedly connected to the side of the baffle 207 facing away from the sliding rod 201. When the electromagnetic coil is de-energized, the compressed return spring 208 extends, pushing the valve stem assembly 200 to slide closer to the front cover 400, opening the contact point between the valve stem 206 and the oil inlet channel 104, and connecting the oil storage chamber 402 with the oil inlet channel 104.

[0029] In this invention, the drive shaft 100 is driven to rotate by an engine belt. The drive shaft 100 drives the drive plate 101, which has a completely centrally symmetrical structure, to rotate in the intermediate cavity formed by the sealed connection of the rear cover 300 and the front cover 400. When the drive plate 101 rotates, the drive plate 101, the rear cover 300, and the front cover 400 are spaced apart from each other. The gap space formed by the annular teeth 102 on the upper and lower end faces of the drive plate 101, the tooth grooves 303 on the rear cover, and the tooth grooves 403 on the front cover forms the engagement cavity 900. When the engagement cavity 900 is filled with silicone oil, the torque of the drive plate 101 is transmitted to the rear cover 300 and the front cover 400 through the shear force of the silicone oil. Unlike ordinary fan clutches, which often require the drive plate 101 to be positioned at the edge of the drive plate 101 to control the flow of silicone oil into the engagement cavity 900, this method is different. The addition of additional valve plates and other components on the side makes it common for ordinary fan clutches to have one side of the drive plate 101 designed for mounting extended valve plates. The valve plates require separate fixing structures, resulting in an asymmetrical structure of the drive plate 101 in ordinary fan clutches. In this invention, the valve stem 206, which controls the opening and closing of the silicone oil inlet / outlet channel 104, is fixedly connected to the baffle 207. Both the baffle 207 and the valve stem 206 are completely housed within the oil reservoir 402. The baffle 207 and the valve stem 206 move up and down by sliding the sliding rod 201, which is embedded in the central groove of the drive shaft 100, thereby opening and closing the oil inlet channel 104. This allows the drive plate 101 to be a completely centrally symmetrical structure, increasing the stability of the drive shaft 100 during rotation.

[0030] It is worth noting that by using the electromagnetic coil 500 in conjunction with the electromagnet 203 and the return spring 208, rapid and precise control of the valve stem 206 is achieved. When energized, oil is cut off, the silicone oil in the engagement chamber 900 decreases, and the transmitted shear force decreases. When energized, oil is introduced, the silicone oil in the engagement chamber 900 increases, and the transmitted shear force increases. This control logic is simple and reliable, and can quickly switch the working state according to the engine temperature control signal.

[0031] Furthermore, the valve stem assembly 200 includes a dust removal sliding sleeve 204 and a connecting rod 205. The dust removal sliding sleeve 204 is located directly below the housing 302 and is slidably sleeved on the outer wall of the drive shaft 100. A through hole 105 is provided on the side wall of the drive shaft 100. The connecting rod 205 passes through the through hole 105, and both ends of the connecting rod 205 are fixedly connected to the chuck 202 and the inner wall of the dust removal sliding sleeve 204, respectively.

[0032] Furthermore, the housing 302 houses a first bearing 700, the cover 301 houses a second bearing 800, the drive shaft 100 is inserted into the first bearing 700 and the second bearing 800, the second bearing 800 is located below the drive plate 101, and the electromagnetic coil 500 is located between the first bearing 700 and the second bearing 800.

[0033] In this invention, external dust and moisture contamination can be effectively isolated. Ordinary fan clutches, when controlling the flow of silicone oil into the engagement chamber 900, often require additional valve plates or other components on the side of the drive plate 101. The coils and wires electrically connected to the valve plates are separately perforated and enter the oil storage chamber 402. However, in this invention, when controlling the sliding rod 201 to slide in the central groove of the drive shaft 100, the electromagnetic coil 500 located in the housing 302 is directly energized. The electromagnet 203 in the groove 106 at the end of the drive shaft 100 away from the rear cover 300 experiences a repulsive force, causing the valve rod assembly 200 to slide away from the front cover 400. The other end of the valve rod 206 is tightly fitted to the inlet of the oil inlet channel 104. The oil storage chamber 402 and... The oil inlet channel 104 is separated. When the electromagnetic coil is de-energized, the compressed return spring 208 extends, pushing the valve stem assembly 200 to slide towards the front cover 400. The valve stem 206 opens at the point where it contacts the oil inlet channel 104, and the oil reservoir 402 connects with the oil inlet channel 104, thereby controlling the silicone oil to enter the oil inlet channel 104 and the engagement chamber 900 for operation. There is no need to separately pass the coil and wires electrically connected to the valve plate through holes into the oil reservoir 402, so that the core working areas inside the clutch, such as the engagement chamber 900 and the oil reservoir 402, are completely isolated from the outside. This design effectively prevents contaminants such as dust, mud, and moisture from entering the clutch, avoiding oil contamination, gear blockage, and mechanical wear caused by the entry of external impurities.

[0034] Furthermore, limiting pieces conforming to the contours of the components are installed between the active plate 101 and the second bearing 800, between the second bearing 800 and the electromagnetic coil 500, between the electromagnetic coil 500 and the first bearing 700, and between the first bearing 700 and the bottom surface of the housing 302.

[0035] In this invention, by setting the first bearing 700 and the second bearing 800 to provide dual-point support for the drive shaft 100, the coaxiality and smooth operation of the rotating components are ensured, and vibration is reduced. At the same time, by installing contour-fitting limit plates between each component, the impact caused by axial movement can be effectively absorbed, preventing damage to the components due to hard collisions, and significantly improving the durability of the mechanical structure.

[0036] Furthermore, an oil groove 107 is provided on the end face of the active plate 101, and the oil groove 107 is connected to the meshing cavity 900 on both sides of the upper and lower end faces of the active plate 101.

[0037] In this invention, the oil groove 107 opened on the end face of the active plate 101 can connect the meshing cavities 900 on the upper and lower sides, promote the uniform distribution of silicone oil in the working cavity, prevent local lack of oil or poor lubrication caused by the accumulation of silicone oil on one side due to centrifugal force, and further protect the meshing surface.

[0038] Furthermore, an oil reservoir cap 103 is fixedly connected to one end face of the active plate 101 near the front cover 400, and the oil reservoir cap 103 is located inside the annular tooth 102.

[0039] Furthermore, the groove on the central axis of the drive shaft 100 and the cross-section of the sliding rod 201 are both square, and the sliding rod 201 slides in the groove on the central axis of the drive shaft 100 without rotating.

[0040] In this invention, by designing the groove at the center of the drive shaft 100 and the cross-section of the sliding rod 201 to be square, it is ensured that the sliding rod 201 will not rotate during its up-and-down movement. This ensures that the valve stem 206 can accurately align with and fit against the inlet of the oil inlet channel 104 each time, avoiding poor sealing or oil leakage caused by valve stem 206 misalignment, and ensuring control accuracy.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A heat-dissipating fan clutch assembly that avoids dust accumulation, characterized in that, Includes a drive shaft (100), with a drive plate (101) fixedly connected to the top of the drive shaft (100). A rear cover (300) is rotatably sleeved on the drive shaft (100). The drive plate (101) is housed in the space between the sealed rear cover (300) and the front cover (400). The top surface of the drive plate (101) and the inner wall of the front cover (400) form an oil storage cavity (402). The end face of the drive plate (101) near the outer edge... There are multiple concentric circular teeth (102), and the circular teeth (102) on the upper and lower end faces are accommodated in the corresponding front cover tooth groove (403) and rear cover tooth groove (303) and form a meshing cavity (900) with each other. The active plate (101) has an oil inlet channel (104) connected to the meshing cavity (900), and the front cover (400) has an oil return channel (401) connected to the meshing cavity (900) and the oil storage cavity (402) respectively. The valve stem assembly (200) runs through the central axis of the drive shaft (100). The sliding rod (201) of the valve stem assembly (200) is slidably connected to the groove opened in the center of the drive shaft (100). One end of the sliding rod (201) is fixedly connected to the chuck (202). The electromagnet (203) is clamped on the chuck (202). The bottom of the drive shaft (100) has a column groove (106). The chuck (202) and the electromagnet (203) are both housed in the column groove (106). The other end of the sliding rod (201) is fixedly connected to the baffle (207). One end of the valve stem (206) is fixedly connected to the side of the baffle (207). The other end of the baffle (207) and the valve stem (206) are directly opposite the inlet of the oil inlet channel (104). The opening and closing of the inlet of the oil inlet channel (104) is controlled by the up and down sliding of the valve stem (206).

2. The heat-dissipating fan clutch assembly for preventing dust accumulation according to claim 1, characterized in that, The rear cover (300) includes a cover body (301), the top of the cover body (301) is sealed to the front cover (400), and the bottom of the cover body (301) is rotatably connected to a housing (302). An electromagnetic coil (500) is housed in the housing (302), and the electromagnetic coil (500) is wound around the drive shaft (100). The outer wall of the cover (301) is fixedly connected to a wire assembly (600) that is electrically connected to the electromagnetic coil (500).

3. The heat-dissipating fan clutch assembly for preventing dust accumulation according to claim 2, characterized in that, The wire assembly (600) includes a socket (601) and a wire (602), the wire (602) being electrically connected to an electromagnetic coil (500) via the socket (601); When the electromagnetic coil is energized, the electromagnet (203) on the chuck (202) is repulsed, causing the valve stem assembly (200) to slide away from the front cover (400). The other end of the valve stem (206) is tightly attached to the inlet of the oil inlet channel (104), and the oil storage chamber (402) is separated from the oil inlet channel (104).

4. The heat-dissipating fan clutch assembly for preventing dust accumulation according to claim 3, characterized in that, The valve stem assembly (200) includes a return spring (208), one end of which is fixedly connected to the inner wall of the bottom of the front cover (400), and the other end of which is fixedly connected to the side of the baffle (207) facing away from the sliding rod (201). When the electromagnetic coil is de-energized, the compressed return spring (208) extends and pushes the valve stem assembly (200) to slide towards the front cover (400). The valve stem (206) and the oil inlet channel (104) are opened, and the oil storage chamber (402) is connected to the oil inlet channel (104).

5. The heat-dissipating fan clutch assembly for preventing dust accumulation according to claim 2, characterized in that, The valve stem assembly (200) includes a dust removal sliding sleeve (204) and a connecting rod (205). The dust removal sliding sleeve (204) is located directly below the housing (302) and is slidably sleeved on the outer wall of the drive shaft (100). A through hole (105) is provided on the side wall of the drive shaft (100). The connecting rod (205) passes through the through hole (105). The two ends of the connecting rod (205) are respectively fixedly connected to the chuck (202) and the inner wall of the dust removal sliding sleeve (204).

6. The heat-dissipating fan clutch assembly for preventing dust accumulation according to claim 5, characterized in that, The housing (302) houses a first bearing (700), the cover (301) houses a second bearing (800), the drive shaft (100) is inserted into the first bearing (700) and the second bearing (800), the second bearing (800) is located below the drive plate (101), and the electromagnetic coil (500) is located between the first bearing (700) and the second bearing (800).

7. The heat-dissipating fan clutch assembly for preventing dust accumulation according to claim 6, characterized in that, Limiting pieces conforming to the contours of the components are installed between the active plate (101) and the second bearing (800), between the second bearing (800) and the electromagnetic coil (500), between the electromagnetic coil (500) and the first bearing (700), and between the first bearing (700) and the bottom surface of the housing (302).

8. The heat-dissipating fan clutch assembly for preventing dust accumulation according to claim 1, characterized in that, An oil groove (107) is provided on the end face of the active plate (101), and the oil groove (107) is connected to the meshing cavity (900) on both sides of the upper and lower end faces of the active plate (101).

9. The heat-dissipating fan clutch assembly for preventing dust accumulation according to claim 1, characterized in that, An oil reservoir cap (103) is fixedly connected to one end face of the active plate (101) near the front cover (400), and the oil reservoir cap (103) is located inside the annular tooth (102).

10. The heat-dissipating fan clutch assembly for preventing dust accumulation according to claim 1, characterized in that, The groove on the central axis of the drive shaft (100) and the cross-section of the sliding rod (201) are both square. The sliding rod (201) slides in the groove on the central axis of the drive shaft (100) without rotating.

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