High-efficiency oil return driving wheel plate of electric control silicone oil clutch assembly

Abstract

The utility model relates to the technical field of silicone oil clutch, especially relates to a high -efficient oil return driving wheel board of electric control silicone oil clutch assembly, including driving wheel board body, oil storage cavity, oil storage cover, oil scraping block and valve component, the driving wheel board body is in cylindrical structure, the peripheral side wall of driving wheel board body is equipped with mounting block, the outer wall middle part of mounting block is equipped with the mounting groove that is outside narrow inside wide isosceles trapezoidal structure, the oil scraping block is fixed on the mounting groove through countersunk head screw, the outer wall of oil scraping block and the inside end surface of front cover contact, one end top of mounting block is equipped with the oil return port, the oil return port is communicated with the oil return hole through the oil return channel set up in the inside of driving wheel board body, the inside of oil storage cavity is equipped with valve component for opening or closing oil outlet hole, the utility model discloses through setting up dovetail groove shape oil scraping block on the driving wheel board, the original gap cooperation becomes the close cooperation, and the oil return effect improves greatly.

Description

Technical Field

[0001] This utility model relates to the field of silicone oil clutch technology, and in particular to a high-efficiency return oil drive wheel plate for an electronically controlled silicone oil clutch assembly. Background Technology

[0002] The electronically controlled silicone oil clutch assembly is a hydraulic coupling widely used in automotive engine cooling systems. It transmits torque using silicone oil as the medium and can automatically adjust the fan speed according to the engine's thermal conditions, thereby reducing power consumption, noise, and energy consumption. Its working principle is generally as follows: when the engine coolant temperature rises, the clutch engages, and the fan rotates at high speed; when the coolant temperature drops, the clutch disengages, and the fan operates at low speed.

[0003] In existing technologies, the drive wheel plate of an electronically controlled silicone oil clutch typically features an oil return structure to recover the silicone oil in the working chamber back to the reservoir, thus achieving clutch disengagement. However, traditional oil return structures primarily rely on the clearance fit between the labyrinth groove and the housing / front cover to "throw" the silicone oil back to the reservoir under centrifugal force. This oil return method is inefficient, resulting in a longer clutch disengagement time and higher disengagement speed, affecting the precise control of the fan and energy consumption. Furthermore, there are gaps between the traditional oil scraping components and the housing / front cover, leading to incomplete oil return. Moreover, the oil scraping components are prone to wear and debris generation during long-term use, contaminating the silicone oil and affecting the clutch's service life and operational sensitivity.

[0004] For the reasons mentioned above, this utility model discloses a high-efficiency oil return drive wheel plate for an electronically controlled silicone oil clutch assembly that can significantly improve oil return efficiency. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a high-efficiency oil return drive plate for an electronically controlled silicone oil clutch assembly. By setting dovetail-shaped oil scrapers on the drive plate, with the lower side of the scraper contacting the inner wall of the housing and the outer and upper sides of the scraper contacting the inner wall of the front cover, the original clearance fit is transformed into a tight fit. Under centrifugal force, the scraper can actively return the silicone oil in the labyrinth groove to the oil storage chamber through the oil return channel and oil return hole. Compared to the traditional method of relying on centrifugal force to naturally throw oil, the oil return effect is significantly improved, effectively shortening the clutch disengagement time and reducing the disengagement speed.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model discloses a high-efficiency oil return drive plate of an electronically controlled silicone oil clutch assembly, including a drive plate body, an oil reservoir, an oil reservoir cover, an oil scraper block, and a valve assembly. The drive plate body has a cylindrical structure, with an annular oil reservoir in the middle of one side wall. An annular oil reservoir cover is provided at the outer end of the oil reservoir. A connecting block is provided in the middle of the oil reservoir, and an oil outlet hole communicating with the working chamber is provided in the middle of the connecting block. A valve assembly is provided on one side of the top of the connecting block. The oil storage chamber has an oil return hole; the circumferential side wall of the drive wheel plate body is provided with a mounting block, and the middle of the outer wall of the mounting block is provided with an isosceles trapezoidal structure with a narrow outer side and a wide inner side. The oil scraper block is fixed to the mounting groove by countersunk screws, and the outer wall of the oil scraper block is in contact with the inner end face of the front cover; one end of the mounting block is provided with an oil return port, and the oil return port is connected to the oil return hole through an oil return channel provided inside the drive wheel plate body; the inner side of the oil storage chamber is provided with the valve assembly for opening or closing the oil outlet.

[0007] The oil scraper includes a protrusion and a dovetail. The cross-sectional shape of the dovetail matches the cross-sectional shape of the mounting groove. The protrusion is a square structure with an arc-shaped outer wall, and the outer wall of the protrusion contacts the inner end face of the front cover. The thickness of the oil scraper is greater than the thickness of the mounting block. The upper and lower sides of the oil scraper contact the inner walls of the front cover and the housing, respectively.

[0008] The angles between the front and rear walls of the dovetail portion and the front and rear walls of the protrusion are both 10°.

[0009] The outer wall of the oil scraper has screw holes on both sides for the screw rod of the countersunk screw to pass through, and the inner wall of the mounting groove has threaded holes on both sides that match the external thread of the countersunk screw; the top of the screw hole has a tapered hole for the nut of the countersunk screw to be inserted, and the taper of the tapered hole is the same as the slope of the nut.

[0010] The oil scraper is made of graphite-filled polytetrafluoroethylene material.

[0011] The active wheel plate body is disposed in the cavity formed by the docking of the front cover and the housing. The outer edges of the two side walls of the active wheel plate body are respectively provided with a first labyrinth groove and a second labyrinth groove. The first labyrinth groove and the second labyrinth groove are respectively fitted with the front cover labyrinth groove on the inner surface of the front cover and the housing labyrinth groove on the inner surface of the housing to form the working cavity communicating with the oil outlet.

[0012] The inner side of the oil storage chamber is provided with an annular valve assembly mounting groove for installing the valve assembly. The valve assembly includes a valve seat, a spring plate, a valve, and a rivet head. The valve is elastically connected to the valve seat by the spring plate, and the spring plate is fixed to the valve and the valve seat by the rivet head. The valve has an annular structure, and its end away from the spring plate is provided with an oil outlet baffle. The valve seat is fixed in the valve assembly mounting groove at the end away from the oil outlet. The end of the valve assembly mounting groove near the oil outlet is provided with a baffle hole for the oil outlet baffle to pass through. The spring plate can drive the oil outlet baffle to contact or separate from the bottom of the oil outlet.

[0013] The beneficial effects of this utility model are as follows:

[0014] (1) Significantly improve oil return efficiency: By setting dovetail groove-shaped oil scrapers on the drive wheel plate, and making the lower side of the oil scraper contact the inner wall of the housing, and the outer and upper sides of the oil scraper contact the inner wall of the front cover, the original clearance fit is changed to a tight fit. Under the action of centrifugal force, the oil scraper can actively return the silicone oil in the labyrinth groove to the oil storage chamber through the oil return channel and oil return hole. Compared with the traditional method of relying on centrifugal force to naturally throw oil, the oil return effect is greatly improved, effectively shortening the clutch disengagement time and reducing the disengagement speed.

[0015] (2) Excellent material properties and extended service life: The oil scraper is made of existing graphite-filled polytetrafluoroethylene material, which has excellent wear resistance, good self-lubricating properties and high resilience. While ensuring close contact with the housing and front cover to achieve efficient oil scraping, it can effectively avoid the contamination of silicone oil by debris generated by scraping, and has excellent high and low temperature resistance, ensuring the dimensional stability and functional reliability of the oil scraper during long-term operation.

[0016] (3) Stable structure and sensitive operation: The oil scraper adopts a dovetail groove structure, which is limited in multiple directions by the dovetail groove notch on the drive wheel plate and the slotted countersunk screws, so that it is firmly fixed in the front-back, up-down, and left-right directions, ensuring that it does not deviate under high-speed rotation and vibration conditions. At the same time, the valve assembly is independently set with the oil storage chamber and the oil scraper, and the valve assembly operates sensitively and smoothly, ensuring precise control of clutch engagement and disengagement.

[0017] (4) Excellent overall performance: The overall structure of this utility model is reasonably designed and the manufacturing process is relatively simple. While improving the oil return efficiency, it also has the advantages of being sturdy and durable, saving fuel, reducing noise and reducing energy consumption, which is conducive to improving the overall performance and fuel economy of the engine cooling system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the high-efficiency oil return drive wheel plate of the electronically controlled silicone oil clutch assembly of this utility model;

[0019] Figure 2 This is a front view of the high-efficiency oil return drive wheel plate of the electronically controlled silicone oil clutch assembly of this utility model;

[0020] Figure 3 for Figure 2 A cross-sectional view along AA;

[0021] Figure 4 for Figure 3 A magnified view of part a in the middle;

[0022] Figure 5 This is a top view of the high-efficiency oil return drive wheel plate of the electronically controlled silicone oil clutch assembly of this utility model;

[0023] Figure 6 for Figure 5 A cross-sectional view along BB;

[0024] Figure 7 This is a schematic diagram of the high-efficiency oil return drive wheel plate of the electronically controlled silicone oil clutch assembly of this utility model from another perspective.

[0025] Figure 8 This is a schematic diagram of the structure of the high-efficiency oil return drive wheel plate of the electronically controlled silicone oil clutch assembly of this utility model, with the oil reservoir cover plate removed.

[0026] Figure 9 This is a schematic diagram of the valve assembly in the high-efficiency return oil drive wheel plate of the electronically controlled silicone oil clutch assembly of this utility model;

[0027] Figure 10 This is a cross-sectional schematic diagram of the high-efficiency oil return drive wheel plate of the electronically controlled silicone oil clutch assembly of this utility model in its service state.

[0028] Figure 11 This is a schematic diagram of the oil scraper block in the high-efficiency oil return drive wheel plate of the electronically controlled silicone oil clutch assembly of this utility model.

[0029] In the attached diagram, 1 is the drive wheel plate body, 2 is the oil storage chamber, 3 is the oil storage cover plate, 4 is the oil scraper block, 5 is the valve assembly, 6 is the connecting block, 7 is the mounting block, 8 is the mounting groove, 9 is the countersunk screw, 11 is the front cover, 12 is the housing, 21 is the oil outlet hole, 22 is the oil return hole, 23 is the oil return port, 24 is the oil return passage, 41 is the conical hole, 42 is the protrusion, 43 is the dovetail, 44 is the screw hole, 51 is the valve seat, 52 is the spring plate, 53 is the valve, 54 is the rivet head, 55 is the oil outlet baffle, 101 is the first labyrinth groove, and 102 is the second labyrinth groove. Detailed Implementation

[0030] The present invention will be further described below:

[0031] Please see Figure 1-11 ,

[0032] This utility model discloses a high-efficiency oil return drive wheel plate for an electronically controlled silicone oil clutch assembly, such as Figures 1 to 8 As shown, it includes a drive wheel plate body 1, an oil storage chamber 2, an oil storage cover plate 3, an oil scraper block 4, and a valve assembly 5.

[0033] The main body 1 of the drive wheel plate is cylindrical in shape, with an annular oil storage cavity 2 formed by an inward indentation in the middle of one side wall for storing silicone oil. An annular oil storage cover 3 is fixed to the opening of the oil storage cavity 2 to seal it. A protruding connecting block 6 is provided in the middle of the oil storage cavity 2, and an oil outlet hole 21 communicating with the working cavity is opened in the middle of the connecting block 6. An oil return hole 22 communicating with the oil storage cavity 2 is opened on one side of the top of the connecting block 6.

[0034] A protruding mounting block 7 is provided on the circumferential side wall of the drive wheel plate body 1. A mounting groove 8 is formed in the middle of the outer wall of the mounting block 7. This mounting groove 8 has an isosceles trapezoidal structure that is narrower on the outside and wider on the inside, i.e., a dovetail groove. The oil scraper block 4 is fixed to the mounting groove 8 by countersunk screws 9. After assembly, the outer wall of the oil scraper block 4 is in close contact with the inner end face of the front cover 11, used to scrape off the silicone oil on the inner wall of the front cover 11 during relative rotation. An oil return port 23 is provided at the top of one end of the mounting block 7. This oil return port 23 communicates with the oil return hole 22 through an oil return channel 24 located inside the drive wheel plate body 1. The scraped silicone oil returns to the oil storage chamber 2 sequentially through the oil return port 23, the oil return channel 24, and the oil return hole 22.

[0035] The inner side of the oil storage chamber 2 is provided with an annular valve assembly mounting groove for installing the valve assembly 5, which is used to open or close the oil outlet 21.

[0036] Furthermore, the structure of the oil scraper block 4 is as follows: Figure 4 and Figure 11 As shown, it includes a protrusion 42 and a dovetail 43. The cross-sectional shape of the dovetail 43 matches the cross-sectional shape of the mounting groove 8, forming a trapezoidal structure that is narrower on the outside and wider on the inside, achieving initial axial and radial positioning. The protrusion 42 is a square structure with an arc-shaped outer wall, and its arc-shaped outer wall forms a line or surface contact with the inner end face of the front cover 11. The thickness of the oil scraper block 4 is greater than the thickness of the mounting block 7. Both sides of the oil scraper block 4 protrude outward and contact the inner walls of the front cover 11 and the housing 12 respectively, changing the original clearance fit into a tight fit, ensuring the oil scraping effect and improving the oil return efficiency.

[0037] The angle between the front and rear walls of the dovetail portion 43 and the front and rear walls of the protrusion 42 is preferably 10°. This angle design is beneficial for guiding the oil scraper block 4 into the mounting groove 8 during installation and ensures that the dovetail portion 43 fits more tightly with the inclined surface of the mounting groove 8 under the action of centrifugal force.

[0038] The outer wall of the oil scraper block 4 has screw holes 44 on both sides, and the inner wall of the mounting groove 8 has threaded holes on both sides that match the external threads of the countersunk screw 9. The top of the screw holes 44 has a tapered hole 41 for accommodating the nut of the countersunk screw 9, and the slope of the tapered hole 41 is the same as the slope of the nut. This design ensures that after the countersunk screw 9 is tightened, its nut is flush with the surface of the oil scraper block 4 or the top of the nut is lower than the surface of the oil scraper block 4, which is both aesthetically pleasing and avoids the nut protruding and interfering with surrounding components.

[0039] To enhance wear resistance and self-lubrication, the scraper block 4 is made of existing graphite-filled polytetrafluoroethylene material, which possesses excellent wear resistance, good self-lubricating properties, and a high resilience. While ensuring close contact with the housing and front cover for efficient oil scraping, it effectively prevents debris generated during scraping from contaminating the silicone oil. Furthermore, it exhibits excellent high and low temperature resistance, ensuring the dimensional stability and functional reliability of the scraper block during long-term operation.

[0040] Furthermore, such as Figure 10 As shown, the active wheel plate body 1 is disposed within the cavity formed by the mating of the front cover 11 and the housing 12. The outer edges of the two side walls of the active wheel plate body 1 are respectively provided with a first labyrinth groove 101 and a second labyrinth groove 102. After the assembly is completed, the first labyrinth groove 101 is in clearance fit with the front cover labyrinth groove on the inner surface of the front cover 11, and the second labyrinth groove 102 is in clearance fit with the housing labyrinth groove on the inner surface of the housing 12, together forming the working chamber communicating with the oil outlet 21. Silicone oil enters this working chamber from the oil outlet 21 and transmits torque under the action of viscous shear force. Simultaneously, the upper and lower sides of the scraper block 4 contact the inner walls of the front cover 11 and the housing 12 respectively, forming a dynamic seal to prevent silicone oil leakage from the sides, ensuring that all silicone oil scraped from the inner wall of the front cover is effectively guided to the oil return port 23, changing the original clearance fit into a tight fit, and further improving the oil return efficiency.

[0041] Furthermore, such as Figure 9As shown, the valve assembly 5 includes a valve seat 51, a spring plate 52, a valve 53, and a rivet head 54. The valve 53 is elastically connected to the valve seat 51 via the spring plate 52, and the spring plate 52 is fixed to the valve 53 and the valve seat 51 via the rivet head 54, forming a whole. The valve 53 has an annular structure, and its end away from the spring plate 52 is provided with an integrally formed or fixedly connected oil outlet baffle 55. The valve seat 51 is fixed in the valve assembly mounting groove at the end away from the oil outlet 21, and the end of the valve assembly mounting groove near the oil outlet 21 is provided with a baffle hole for the oil outlet baffle 55 to pass through. During operation, the electronic control unit controls the electromagnet to engage or disengage, driving the valve 53 to overcome or utilize the elastic force of the spring plate 52, so that the oil outlet baffle 55 contacts or separates from the bottom of the oil outlet 21. When there is a gap between the oil outlet baffle 55 and the oil outlet 21, the silicone oil in the oil storage chamber 2 enters the working chamber through the oil outlet 21 under the action of centrifugal force; when the oil outlet baffle 55 is pressed tightly against the bottom of the oil outlet 21, the silicone oil supply is cut off, and the clutch is quickly disengaged.

[0042] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-efficiency return drive wheel plate for an electronically controlled silicone oil clutch assembly, characterized in that: Includes the drive wheel plate body, oil reservoir, oil reservoir cover, oil scraper, and valve assembly. The active wheel plate body has a cylindrical structure, and an annular oil storage cavity is provided in the middle of one side wall. An annular oil storage cover plate is provided at the outer end of the oil storage cavity. A connecting block is provided in the middle of the oil storage cavity. An oil outlet hole communicating with the working cavity is provided in the middle of the connecting block. An oil return hole communicating with the oil storage cavity is provided on one side of the top of the connecting block. The drive wheel plate body has a mounting block on its circumferential sidewall. The mounting block has an isosceles trapezoidal groove in the middle of its outer wall, which is narrow on the outside and wide on the inside. The oil scraper block is fixed to the mounting groove by countersunk screws. The outer wall of the oil scraper block is in contact with the inner end face of the front cover. One end of the mounting block has an oil return port, which is connected to the oil return hole through an oil return channel set inside the drive wheel plate body. The inner side of the oil storage cavity is provided with a valve assembly for opening or closing the oil outlet; the oil scraper includes a protrusion and a dovetail, the cross-sectional shape of the dovetail matches the cross-sectional shape of the mounting groove, the protrusion is a square structure with an arc-shaped outer wall, and the outer wall of the protrusion contacts the inner end face of the front cover; the thickness of the oil scraper is greater than the thickness of the mounting block, and the upper and lower sides of the oil scraper contact the inner walls of the front cover and the housing, respectively; the outer walls of the oil scraper are provided with screw holes for the screw rods of the countersunk screws to pass through on both sides, and the inner walls of the mounting groove are provided with threaded holes that match the external threads of the countersunk screws on both sides; the top of the screw hole is provided with a tapered hole for the nut of the countersunk screw to be inserted, and the taper of the tapered hole is the same as the slope of the nut; the oil scraper is made of graphite-filled polytetrafluoroethylene material.

2. The high-efficiency return drive wheel plate of the electronically controlled silicone oil clutch assembly according to claim 1, characterized in that: The angles between the front and rear walls of the dovetail portion and the front and rear walls of the protrusion are both 10°.

3. The high-efficiency return drive wheel plate of the electronically controlled silicone oil clutch assembly according to claim 2, characterized in that: The active wheel plate body is disposed in the cavity formed by the docking of the front cover and the housing. The outer edges of the two side walls of the active wheel plate body are respectively provided with a first labyrinth groove and a second labyrinth groove. The first labyrinth groove and the second labyrinth groove are respectively fitted with the front cover labyrinth groove on the inner surface of the front cover and the housing labyrinth groove on the inner surface of the housing to form the working cavity communicating with the oil outlet.

4. The high-efficiency return drive wheel plate of the electronically controlled silicone oil clutch assembly according to claim 3, characterized in that: The inner side of the oil storage chamber is provided with an annular valve assembly mounting groove for installing the valve assembly. The valve assembly includes a valve seat, a spring plate, a valve, and a rivet head. The valve is elastically connected to the valve seat by the spring plate, and the spring plate is fixed to the valve and the valve seat by the rivet head. The valve has an annular structure, and its end away from the spring plate is provided with an oil outlet baffle. The valve seat is fixed in the valve assembly mounting groove at the end away from the oil outlet. The end of the valve assembly mounting groove near the oil outlet is provided with a baffle hole for the oil outlet baffle to pass through. The spring plate can drive the oil outlet baffle to contact or separate from the bottom of the oil outlet.

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