Engine crankcase cover plate assembly and crankcase

Abstract

The invention belongs to the technical field of crankcases, and particularly relates to an engine crankcase cover plate assembly and a crankcase. The cover plate assembly is used for sealing the opening in the side end of the crankcase and lubricating other parts in the crankcase through engine oil at the bottom in the crankcase. The cover plate assembly is used for sealing the opening in the side end of the crankcase and lubricating other parts in the crankcase through engine oil at the bottom in the crankcase. The oil pump assembly and the oil way conversion assembly are integrated on the cover plate assembly, and the integration degree is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of crankcases, and in particular relates to an engine crankcase cover plate assembly and a crankcase. Background Art

[0002] The crankcase consists of an upper crankcase and a lower crankcase. The upper crankcase is integrally cast with the cylinder block, while the lower crankcase stores lubricating oil and seals the upper crankcase, hence the name "oil sump." Typically, the cylinder block and crankcase are cast as a single piece, known as a cylinder crankcase. This structure offers superior rigidity and strength, simplified manufacturing, and facilitates engine assembly and disassembly. The crankcase cover primarily seals the crankcase side, preventing oil leakage and ensuring proper engine operation.

[0003] The oil at the bottom of the crankcase needs to be extracted by a pump. The oil coming out of the pump is divided into two paths, one path passes through the filter and enters the various lubrication parts, and the other path passes through the pressure relief valve and re-enters the crankcase.

[0004] With the improvement of manufacturing technology and the increasing integration of parts, the oil pump, oil filter and pressure relief valve are generally integrated into the crankcase cover. However, there are some areas for improvement: 1. The degree of integration of the oil pump, oil filter, pressure relief valve and crankcase cover is not high, and the degree of integration can be further improved.

[0005] 2. The oil pump generally uses a gear pump. The amount of oil pumped by the gear pump depends on the crankshaft speed. The faster the speed, the greater the amount of oil pumped. Although the pressure in the oil circuit where the engine oil is located can be limited by the pressure relief valve, when the oil pump is working at a high speed, regardless of whether the pressure is relieved or not, a corresponding flow of oil will be pumped out. The gears in the pump are subjected to greater force, and loosening due to vibration will occur after long-term operation.

[0006] 3. The filter paper in the oil filter will become clogged after working for a long time. In order to ensure that the oil circuit continues to be in a flowing state after the filter paper is clogged, a spare channel without filtering function will be set next to the oil circuit. Because the spare channel has no filtering function, the oil entering the crankcase through the spare channel contains impurities, which is not conducive to the operation of the engine.

[0007] The present invention designs an engine crankcase cover plate assembly and a crankcase to solve the above problems. Summary of the Invention

[0008] Based on this, it is necessary to provide an engine crankcase cover plate assembly and crankcase to address the problems existing in the current crankcase. The cover plate assembly of the present invention integrates an oil pump assembly and an oil circuit conversion assembly, which effectively improves the degree of integration. The oil pump assembly of the present invention can rotate a certain angle relative to the first rotating shaft when the oil pressure in the pump housing is too high through the first oil pumping gear set on the first rotating shaft, so that the first oil pumping gear can move axially a certain distance under the threaded cooperation with the first rotating shaft, and finally form a gap between the first oil pumping gear and the second oil pumping gear and the inner wall of the pump housing and the sealing plate, which directly connects the oil inlet and the oil outlet inside the pump housing, thereby achieving effective pressure relief in the pump housing and reducing the amount of oil pumped by the oil pump assembly, thereby reducing the vibration of the first oil pumping gear and the second oil pumping gear caused by the force, and avoiding the loosening of the first oil pumping gear and the second oil pumping gear caused by the vibration caused by the large force during long-term use. The oil circuit conversion assembly of the present invention utilizes the power of the second rotating shaft of the oil pump assembly to rapidly rotate the centrifugal strips on the second filter cartridge, thereby increasing the centrifugal force of the engine oil pumped by the oil pump assembly through the first oil outlet pipe into the annular space between the first cylinder and the second filter cartridge, ensuring that the engine oil pumped through the first oil outlet pipe into the annular space between the first cylinder and the second filter cartridge can be effectively filtered by the first filter cartridge and then reach the crankcase or the parts requiring lubrication through the fourth oil outlet pipe, the oil cavity, and the third oil outlet pipe. When the first filter cartridge becomes clogged after long-term use, the oil circuit conversion assembly of the present invention rotates the third cylinder to close the first oil hole on the first cylinder, so that the engine oil pumped through the first oil outlet pipe into the annular space between the first cylinder and the second filter cartridge reaches a certain pressure, overcomes the centrifugal force generated by the centrifugal strips on the second filter cartridge, and is filtered by the second filter cartridge, enters the second annular sleeve, and then opens the valve assembly through the second oil outlet pipe to reach the crankcase or the parts requiring lubrication, thereby preventing the engine oil from being filtered out of impurities after the first filter cartridge becomes clogged and adversely affecting the operation of the crankcase when it reaches the lubrication parts. The densely packed messy soft hairs on the inner wall of the first filter cartridge in the oil circuit conversion assembly of the present invention can lock the impurities blocked by the first filter cartridge, preventing the impurities at the filtration point from re-entering the engine oil, making it convenient to remove the impurities in the engine oil when the first filter cartridge is subsequently replaced, effectively reducing the impurity content of the engine oil and improving the filtration efficiency of the newly replaced first filter cartridge.

[0009] The above purpose is achieved through the following technical solutions: An engine crankcase cover plate assembly and a crankcase, comprising: The camshaft is a shaft that is connected to the oil pump of the oil pump assembly and the oil pump is connected to the oil pump assembly through the oil pump housing. The camshaft is connected to the oil pump assembly through the oil pump housing. The camshaft is connected to the oil pump assembly through the oil pump housing. The camshaft is connected to the oil pump assembly through the oil pump housing.

[0010] In one embodiment, the side end cover is connected to the side end of the crankcase by bolts, and a first sealing gasket is provided between the side end cover and the crankcase.

[0011] In one embodiment, the oil pump assembly includes a pump housing with an opening at the lower end, and an oil inlet and an oil outlet are formed on opposite sides of the middle portion of the pump housing. The oil inlet is connected to the bottom of the crankcase through an oil suction pipe, and the oil outlet is connected to the oil circuit rotating assembly through a first oil outlet pipe. A second axial hole and a third axial hole are formed on the top of the pump housing, and the second axial hole and the third axial hole are symmetrically distributed on both sides of the axis of the oil inlet or the oil outlet. A first rotating shaft and a second rotating shaft connected to the crankshaft end for transmission are respectively rotatably provided in the second axial hole and the third axial hole, a first oil pumping gear is provided on the first rotating shaft, which is clearance-matched with the inner wall of the pump housing, a second annular groove is formed on the inner wall of the fourth axial hole of the first oil pumping gear, and the inner wall of the upper end of the second annular groove of the fourth axial hole is opened. The gear train is connected with the gear of the said oil pump to form a circle, and the gear train is connected with the gear of the said oil pump to form a circle.

[0012] In one embodiment, an oil pressure sensor is installed on the wall of the first oil outlet pipe through a branch pipe.

[0013] In one embodiment, the upper end of the second rotating shaft is provided with a second limit sleeve that cooperates with the top of the pump casing through bolts, and the top of the pump casing is provided with a first limit sleeve that rotatably cooperates with the annular convex on the first rotating shaft through bolts. The first rotating shaft is provided with two guide keys that are 180 degrees apart in the circumferential direction, and the guide keys slide in the keyway on the inner wall of the first ring sleeve. The sealing plate is provided with a guide sleeve that slides with the inner wall of the pump casing, and a second sealing gasket is provided between the first ring plate and the pump casing.

[0014] In one embodiment, a first gear is provided at the upper end of the first rotating shaft, and the first gear is engaged with a second gear at the crankshaft end.

[0015] In one embodiment, the oil circuit conversion assembly includes a first ring plate arranged on the top of the pump casing by bolts, a coaxial second ring sleeve and a first cylinder are provided on the first ring plate, an annular gap is provided between the first cylinder and the second ring sleeve, a third ring plate is provided on the outer side of the first cylinder, a second cylinder is provided on the third ring plate, an annular space is provided between the second cylinder and the first cylinder, the cylinder wall of the first cylinder is evenly and densely provided with first oil holes, and the first oil holes are located above the third ring plate, a third ring sleeve is provided on the upper end of the second ring sleeve through the second ring plate, a second filter cartridge with an upper end seal is inserted into the third ring sleeve, a rotary sealing sleeve is matched between the second filter cartridge and the third ring sleeve, a hexagonal shaft is provided at the lower end of the second filter cartridge through a connecting rod to match the hexagonal groove at the upper end of the second rotating shaft, a first slot is provided on the third ring plate, a first filter cartridge is inserted in the first slot to divide the annular space between the second cylinder and the first cylinder into two annular spaces, and an upper end is provided on the outer side of the first cylinder The sealed third cylinder has second oil holes evenly and densely distributed on the cylinder wall of the third cylinder, which correspond to the first oil holes one by one. The top of the second filter cylinder is provided with a positioning shaft, and the positioning shaft is arranged in a swivel seat at the top of the third cylinder. The top of the second cylinder is threadedly connected to a sealing cover. The top of the sealing cover is provided with a second slot that cooperates with the second cylinder, a third slot that cooperates with the first filter cylinder, and a fourth slot that cooperates with the fourth ring sleeve at the top of the third cylinder. A first sealing ring is matched between the inner wall of the second slot and the second cylinder, a second sealing ring is matched between the inner wall of the third slot and the inner and outer walls of the first filter cylinder, and a third sealing ring is matched between the fourth slot and the inner and outer walls of the fourth ring sleeve. A second oil outlet pipe communicating with the interior is provided on the wall surface of the second ring sleeve, and the upper end of the second oil outlet pipe is connected to the third oil outlet pipe through the oil chamber. A fourth oil outlet pipe communicating with the second cylinder is provided on the wall surface of the oil chamber, and a valve assembly that can only be opened under the action of the oil pressure therein is provided at the upper end of the second oil outlet pipe.

[0016] In one embodiment, the valve assembly includes a baffle, which is hinged to the pipe opening at the upper end of the second oil outlet pipe, and a leaf spring is connected between the baffle and the inner wall of the oil chamber.

[0017] In one embodiment, the inner wall of the first filter cartridge is densely covered with messy soft hairs.

[0018] In one embodiment, a plurality of centrifugal strips are circumferentially arranged on the outer wall of the second filter cartridge to enhance the centrifugal effect thereof.

[0019] The beneficial effects of the present invention are: 1. The cover plate assembly of the present invention integrates the oil pump assembly and the oil circuit conversion assembly, which effectively improves the degree of integration.

[0020] 2. The oil pump assembly of the present invention can rotate a certain angle relative to the first rotating shaft through the first oil pumping gear provided on the first rotating shaft when the oil pressure in the pump casing is too high, so that the first oil pumping gear can perform axial movement of a certain distance under the threaded cooperation with the first rotating shaft, and finally form a gap between the first oil pumping gear and the second oil pumping gear and the inner wall of the pump casing and the sealing plate inside the pump casing, which directly connects the oil inlet and the oil outlet, thereby achieving effective pressure relief in the pump casing and reducing the oil pumping amount of the oil pump assembly, thereby reducing the vibration of the first oil pumping gear and the second oil pumping gear caused by the force, and avoiding the loosening of the first oil pumping gear and the second oil pumping gear caused by the vibration caused by the large force during long-term use.

[0021] 3. The oil circuit conversion assembly of the present invention utilizes the power of the second rotating shaft of the oil pump assembly to rapidly rotate the centrifugal strips on the second filter cartridge, thereby increasing the centrifugal force of the engine oil pumped by the oil pump assembly through the first oil outlet pipe into the annular space between the first cylinder and the second filter cartridge. This ensures that the engine oil pumped through the first oil outlet pipe into the annular space between the first cylinder and the second filter cartridge can be effectively filtered by the first filter cartridge and then reach the crankcase or the area requiring lubrication through the fourth oil outlet pipe, the oil cavity, and the third oil outlet pipe. When the first filter cartridge becomes clogged after prolonged use, the oil circuit conversion assembly of the present invention rotates the third cylinder to close the first oil hole on the first cylinder. This allows the engine oil pumped through the first oil outlet pipe into the annular space between the first cylinder and the second filter cartridge to reach a certain pressure, overcome the centrifugal force generated by the centrifugal strips on the second filter cartridge, and reversely pass through the second filter cartridge to enter the second annular sleeve. The oil then opens the valve assembly through the second oil outlet pipe and reaches the crankcase or the area requiring lubrication. This prevents the engine oil from being filtered out of impurities after the first filter cartridge becomes clogged, which could adversely affect the operation of the crankcase when it reaches the lubrication area.

[0022] 4. The densely packed messy soft hairs on the inner wall of the first filter cartridge in the oil circuit conversion assembly of the present invention can lock the impurities blocked by the first filter cartridge, preventing the impurities at the filtration point from re-entering the engine oil, making it easier to remove the impurities in the engine oil when the first filter cartridge is subsequently replaced, effectively reducing the impurity content of the engine oil and improving the filtration efficiency of the newly replaced first filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the crankcase and cover plate assembly in the present invention; Figure 3 This is a cross-sectional view of the connection structure between the side end cover and the crankcase in the cover assembly; Figure 4 This is a cross-sectional view of the transmission connection between the first rotating shaft of the oil pump assembly in the cover assembly and the crankshaft end; Figure 5 is a schematic diagram of the cover assembly; Figure 6 This is a cross-sectional view of the oil pump assembly and the oil circuit conversion assembly in the cover assembly; Figure 7 This is a cross-sectional view of the top structure of the oil circuit conversion assembly; Figure 8 This is a cross-sectional view of the communication structure between the first oil outlet pipe and the first cylinder in the oil pump assembly; Figure 9 This is a cross-sectional view of the cooperation between the first oil pumping gear and the second oil pumping gear in the oil pump assembly; Figure 10 is the side end cover and its cross-sectional view; Figure 11 This is the first oil pump gear structure and its cross-sectional view; Figure 12 1 is a schematic diagram of the second oil pump gear structure; Figure 13 is the first rotating shaft structure and its cross-sectional view; Figure 14 is a sealing plate and a cross-sectional view thereof; Figure 15 The first cylinder and the second cylinder structure and their cross-sectional views; Figure 16 The upper structure of the second filter cartridge and its cross-sectional view; Figure 17 It is the structure on the third cylinder and its cross-sectional view; Figure 18 is a cross-sectional view of the first filter cartridge; Figure 19 is a cross-sectional view of the sealing cover structure; Name of the label in the figure: 101. Crankcase; 102. Crankshaft end; 200, cover plate assembly; 201, side end cover; 202, first shaft hole; 203, first sealing gasket; 204, oil pump assembly; 205, pump housing; 206, oil inlet; 207, oil outlet; 208, oil suction pipe; 209, first oil outlet pipe; 210, oil pressure sensor; 211, first oil pump gear; 212, fourth shaft hole; 213, internal thread; 215, limit groove; 216, first ring groove; 217, second ring groove; 218, first rotating shaft; 219, ring Convex; 220, guide key; 221, limit block; 222, external thread; 223, first ring sleeve; 224, keyway; 225, vortex spring; 226, first limiting sleeve; 227, first gear; 228, second gear; 229, second oil pump gear; 230, second rotating shaft; 231, hexagonal groove; 233, second limiting sleeve; 234, sealing plate; 235, guide ring; 236, guide sleeve; 237, sealing cover; 238, oil circuit conversion assembly; 239, first ring plate; 240, second ring sleeve; 241, second ring plate; 242, third ring sleeve; 243, first cylinder; 244, first oil hole; 245, third ring plate; 246, first slot; 247, second cylinder; 248, second oil outlet pipe; 249, oil cavity; 250, third oil outlet pipe; 251, fourth oil outlet pipe; 252, valve assembly; 253, baffle; 254, leaf spring; 255, second sealing gasket; 256, first filter cartridge; 257, soft hair; 258, third Cylinder; 259, second oil hole; 260, swivel seat; 261, fourth ring sleeve; 262, second filter cartridge; 263, connecting rod; 264, hexagonal shaft; 265, positioning shaft; 266, centrifugal slats; 268, rotary sealing sleeve; 269, sealing cover; 270, second slot; 271, third slot; 272, fourth slot; 273, first sealing ring; 274, second sealing ring; 275, third sealing ring; 276, second axial hole; 277, third axial hole. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like, indicating positions or relationships, are based on those shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or element referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention.

[0026] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] like Figure 1-19 As shown, an engine crankcase 101 cover plate assembly 200 and a crankcase 101, comprising: The cover plate assembly 200 provided at the side opening of the crankcase 101 is used to seal the side opening of the crankcase 101 and use the engine oil at the bottom of the crankcase 101 to lubricate other parts of the crankcase 101. The cover plate assembly 200 includes a side end cover 201 for sealing the side opening of the crankcase 101. The side end cover 201 is provided with a first shaft hole 202 that rotates with the crankshaft. The lower side of the side end cover 201 is provided with a shaft that uses the power of the crankshaft to extract the engine oil at the bottom of the crankcase 101 to lubricate the crankcase. The oil pump assembly for lubricating other parts of 101 has the structural characteristics of automatically relieving pressure and failing to operate when the oil pressure inside it is too high, and automatically resuming effective operation when the oil pressure inside it returns to normal. An oil circuit conversion assembly 238 is provided on the outside of the oil pump assembly for filtering and outputting the oil from the oil pump assembly 204 using the power of the oil pump assembly 204. The oil circuit conversion assembly 238 has the structural characteristics of providing two filter oil circuits for the oil from the oil pump assembly 204 that can be switched with each other and both have filtering functions.

[0028] In a further embodiment, Figure 1 、 Figure 3As shown, the side end cover 201 is connected to the side end of the crankcase 101 by bolts, and a first sealing gasket 203 is provided between the side end cover 201 and the crankcase 101 .

[0029] In one embodiment, in a further embodiment, as Figure 4 、 Figure 5 、 Figure 6 、 Figure 8 、 Figure 9 As shown, the oil pump assembly 204 includes a pump housing 205 with an opening at the lower end, and an oil inlet 206 and an oil outlet 207 are opened on both sides of the middle of the pump housing 205. The oil inlet 206 is connected to the bottom of the crankcase 101 through an oil suction pipe 208, and the oil outlet 207 is connected to the oil circuit assembly through a first oil outlet pipe 209. A second shaft hole 276 and a third shaft hole 277 are opened on the top of the pump housing 205. The second shaft hole 276 and the third shaft hole 277 are symmetrically distributed on the inlet and outlet. On both sides of the axis of the oil port 206 or the oil outlet 207, the first rotating shaft 218 and the second rotating shaft 230 connected to the crankshaft end 102 are rotatably arranged in the second shaft hole 276 and the third shaft hole 277 respectively. The first rotating shaft 218 is provided with a first oil pumping gear 211 with a clearance fit with the inner wall of the pump housing 205. The inner wall of the fourth shaft hole 212 of the first oil pumping gear 211 is provided with a second annular groove 217. The inner wall of the upper end of the second annular groove 217 of the fourth shaft hole 212 is provided with a The fourth shaft hole 212 has an inner thread 213 that cooperates with the outer thread 222 on the first shaft 218. The inner wall of the lower end of the second annular groove 217 of the fourth shaft hole 212 is provided with a limit groove 215 that cooperates with the upper limit block 221 of the first shaft 218. The first shaft 218 is slidably provided with a first ring sleeve 223, and the first ring sleeve 223 is rotatably provided in the second annular groove 217. A vortex spring 225 is connected between the first ring sleeve 223 and the inner wall of the second annular groove 217. The second shaft 230 is provided with a A second oil pump gear 229 is provided which is meshed with the first oil pump gear 211 and has a clearance fit with the inner wall of the pump housing 205. A sealing plate 234 is vertically slid inside the pump housing 205 to seal it. A guide ring 235 is provided on the inner side of the sealing plate 234. The guide ring 235 is rotatably provided in the first annular groove 216 on the lower end surface of the first oil pump assembly. A sealing cover 237 is installed at the lower end opening of the pump housing 205 by bolts to seal it. An air pressure balance hole is provided on the sealing cover 237.

[0030] In a further embodiment, Figure 9 As shown, an oil pressure sensor 210 is installed on the wall of the first oil outlet pipe 209 through a branch pipe.

[0031] In one embodiment, in a further embodiment, as Figure 6 、 Figure 13As shown, the upper end of the second rotating shaft 230 is provided with a second limiting sleeve 233 that cooperates with the top of the pump casing 205 through bolts, and the top of the pump casing 205 is provided with a first limiting sleeve 226 that rotatably cooperates with the annular protrusion 219 on the first rotating shaft 218 through bolts. The first rotating shaft 218 is provided with two guide keys 220 that are 180 degrees apart in the circumferential direction, and the guide keys 220 slide in the keyway 224 on the inner wall of the first annular sleeve 223. The sealing plate 234 is provided with a guide sleeve 236 that slides with the inner wall of the pump casing 205, and a second sealing gasket 255 is provided between the first annular plate 239 and the pump casing 205.

[0032] In a further embodiment, Figure 4 As shown, a first gear 227 is provided at the upper end of the first rotating shaft 218 , and the first gear 227 is engaged with the second gear 228 of the crankshaft end 102 .

[0033] In a further embodiment, Figure 6 Figure 7 、 Figure 8As shown, the oil circuit conversion assembly 238 includes a first ring plate 239 that is bolted to the top of the pump housing 205, and a coaxial second ring sleeve 240 and a first cylinder 243 are provided on the first ring plate 239. There is an annular gap between the first cylinder 243 and the second ring sleeve 240, and a third ring plate 245 is provided on the outer side of the first cylinder 243. A second cylinder 247 is provided on the third ring plate 245, and an annular space is provided between the second cylinder 247 and the first cylinder 243. The wall of the first cylinder 243 is evenly and densely provided with first oil holes 244, and the first oil holes 244 are located above the third ring plate 245. The second ring sleeve 240 is provided with a plurality of The upper end is provided with a third ring sleeve 242 through the second ring plate 241, and the third ring sleeve 242 is inserted with a second filter cartridge 262 with an upper end seal, and a rotating sealing sleeve 268 is matched between the second filter cartridge 262 and the third ring sleeve 242. The lower end of the second filter cartridge 262 is provided with a hexagonal shaft 264 that cooperates with the hexagonal groove 231 at the upper end of the second rotating shaft 230 through a connecting rod 263. The third ring plate 245 is provided with a first slot 246, and the first slot 246 is inserted with a first filter cartridge 256 that divides the annular space between the second cylinder 247 and the first cylinder 243 into two annular spaces. The outer side of the first cylinder 243 is provided with a The third cylinder 258 has second oil holes 259 uniformly and densely distributed on the wall of the third cylinder 258, which correspond to the first oil holes 244. The top of the second filter cylinder 262 is provided with a positioning shaft 265, which is arranged in the rotating seat 260 at the top of the third cylinder 258. The top of the second cylinder 247 is threadedly connected with a sealing cover 269. The top of the sealing cover 269 is provided with a second slot 270 that matches the second cylinder 247, a third slot 271 that matches the first filter cylinder 256, and a fourth slot 272 that matches the fourth ring sleeve 261 at the top of the third cylinder 258. The inner wall of the second slot 270 matches the second cylinder 247. A first sealing ring 273 is provided between the cylinders 247, a second sealing ring 274 is provided between the inner wall of the third slot 271 and the inner and outer walls of the first filter cylinder 256, a third sealing ring 275 is provided between the inner and outer walls of the fourth slot 272 and the fourth ring sleeve 261, a second oil outlet pipe 248 communicating with the interior of the second ring sleeve 240 is provided on the wall surface of the second oil outlet pipe 248, the upper end of the second oil outlet pipe 248 is connected to the third oil outlet pipe 250 through the oil cavity 249, a fourth oil outlet pipe 251 communicating with the second cylinder 247 is provided on the wall surface of the oil cavity 249, and a valve assembly 252 is provided at the upper end of the second oil outlet pipe 248 which can only be opened under the action of the oil pressure therein.

[0034] In a further embodiment, Figure 7As shown, the valve assembly 252 includes a baffle 253 , which is hinged to the pipe opening at the upper end of the second oil outlet pipe 248 , and a leaf spring 254 is connected between the baffle 253 and the inner wall of the oil chamber 249 .

[0035] In a further embodiment, Figure 18 As shown, the inner wall of the first filter cartridge 256 is densely covered with messy soft hairs 257 .

[0036] In a further embodiment, Figure 7 、 Figure 16 As shown, the outer wall of the second filter cartridge 262 is circumferentially provided with a plurality of centrifugal strips 266 for enhancing the centrifugal effect thereof.

[0037] The cover plate assembly 200 of the present invention integrates the oil pump assembly 204 and the oil circuit conversion assembly 238, effectively improving the level of integration. The oil pump assembly 204 of the present invention utilizes the first oil pumping gear 211 disposed on the first rotating shaft 218 to rotate a certain angle relative to the first rotating shaft 218 when the oil pressure within the pump housing 205 is excessive. This allows the first oil pumping gear 211 to undergo a certain distance of axial movement due to its threaded engagement with the first rotating shaft 218. This ultimately creates a gap between the first and second oil pumping gears 211, 229, the inner wall of the pump housing 205, and the sealing plate 234, directly connecting the oil inlet 206 and the oil outlet 207 within the pump housing 205. This effectively relieves pressure within the pump housing 205 and reduces the amount of oil pumped by the oil pump assembly. This, in turn, reduces the vibration of the first and second oil pumping gears 211, 229 caused by the applied force, thereby preventing the first and second oil pumping gears 211, 229 from loosening due to vibration caused by the high applied force during long-term use. The oil circuit conversion assembly 238 in the present invention utilizes the power of the second rotating shaft 230 in the oil pump assembly to drive the centrifugal strips 266 on the second filter barrel 262 to rotate rapidly, thereby increasing the centrifugal force of the engine oil pumped into the annular space between the first cylinder 243 and the second filter barrel 262 through the first oil outlet pipe 209 by the oil pump assembly, ensuring that the engine oil pumped into the annular space between the first cylinder 243 and the second filter barrel 262 through the first oil outlet pipe 209 can be effectively filtered through the first filter barrel 256 and reach the crankcase 101 or the part that needs lubrication through the fourth oil outlet pipe 251, the oil cavity 249, and the third oil outlet pipe 250. The oil circuit conversion assembly 238 in the present invention closes the first oil hole 244 on the first cylinder 243 by rotating the third cylinder 258 when the first filter cylinder 256 becomes clogged after being used for a long time, so that the engine oil pumped into the annular space between the first cylinder 243 and the second filter cylinder 262 through the first oil outlet pipe 209 reaches a certain pressure to overcome the centrifugal force generated by the centrifugal strips 266 on the second filter cylinder 262 and enters the second annular sleeve 240 through the filtration of the second filter cylinder 262 in the reverse direction and opens the valve assembly 252 through the second oil outlet pipe 248 to reach the crankcase 101 or the part that needs lubrication, thereby avoiding the engine oil from having an adverse effect on the operation of the crankcase 101 when it reaches the lubrication part due to the failure to filter impurities after the first filter cylinder 256 is clogged. The densely packed messy soft hairs 257 on the inner wall of the first filter cartridge 256 in the oil circuit conversion assembly 238 of the present invention can lock the impurities blocked by the first filter cartridge 256, preventing the impurities at the filtration point from re-entering the engine oil, making it easier to remove the impurities in the engine oil when the first filter cartridge 256 is subsequently replaced, effectively reducing the impurity content of the engine oil and improving the filtration efficiency of the newly replaced first filter cartridge 256.

[0038] The operation process of the present invention is as follows: In the initial state, the vortex spring 225 is compressed, the limiter block 221 is positioned at one end of the limiter groove 215 under the action of the vortex spring 225, and a slight gap exists between the first and second oil pumping gears 211, 229 and the inner walls of the pump housing 205 and the inner walls of the sealing plate 234. The second oil hole 259 in the third cylinder 258 is aligned with the first oil hole 244 in the first cylinder 243 and is open to the first oil hole 244 in the first cylinder 243. There are gaps between the sealing cover 269 and the upper ends of the fourth ring 261, the first filter cartridge 256, and the second cylinder 247. The baffle 253 in the valve assembly 252 is closed to the second oil outlet pipe 248 under the action of the leaf spring 254. The first and second filter cartridges 256, 262 are both newly replaced.

[0039] At this time, the engine is started, and the crankshaft end 102 of the engine rotates. The crankshaft end 102 drives the first rotating shaft 218 to rotate through the second gear 228 and the first gear 227. The first rotating shaft 218 drives the first oil pumping gear 211 to rotate through the first ring sleeve 223 and the vortex spring 225. The first oil pumping gear 211 drives the second oil pumping gear 229 to rotate. The rotating first oil pumping gear 211 and the second oil pumping gear 229 make the oil at the bottom of the crankcase 101 flow out through the oil suction pipe 208 and the oil inlet 206, pump housing 205, oil outlet 207, first oil outlet pipe 209 enter the first cylinder 243, the second oil pump gear 229 drives the second shaft 230 to rotate synchronously, the second shaft 230 drives the second filter cartridge 262 to rotate synchronously through the hexagonal shaft 264 and the connecting rod 263, the rotating second filter cartridge 262 drives all the centrifugal strips 266 thereon to rotate synchronously and rapidly, the centrifugal strips 266 make the oil entering the first cylinder 243 generate a large centrifugal force, the first cylinder 2 The engine oil in the cylinder 243 enters the first filter cylinder 256 through the first oil hole 244 on the first cylinder 243 and the second oil hole 259 on the third cylinder 258. The engine oil entering the first filter cylinder 256 is filtered by the first filter cylinder 256 under the action of centrifugal pressure and then enters the second cylinder 247. The engine oil entering the second cylinder 247 enters the oil chamber 249 through the fourth oil outlet pipe 251 under the action of pressure. The engine oil entering the oil chamber 249 reaches the crankcase 101 through the third oil outlet pipe 250. The parts that need lubrication may be recirculated into the crankcase 101, and the engine oil entering the oil chamber 249 will not enter the second ring sleeve 240 from the second oil outlet pipe 248 because the baffle 253 closes the second oil outlet pipe 248 under the action of the leaf spring 254. The messy soft hair 257 on the inner wall of the first filter cartridge 256 can intercept impurities in the engine oil and prevent impurities filtered by the first filter cartridge 256 from returning to the engine oil. The impurities can be taken out when the first filter cartridge 256 is replaced, effectively reducing the impurities in the engine oil.

[0040] After a period of use, the soft hair 257 on the inner wall of the first filter cartridge 256 is clogged due to the accumulation of a large number of impurities. At this time, the second filter cartridge 262 drives all the centrifugal strips 266 thereon to rotate rapidly, causing the oil entering the first cylinder 243 to be blocked, thereby causing the oil pressure in the pump housing 205 of the oil pump assembly to accumulate and rise. At this time, the oil pressure sensor 210 installed on the pipe wall branch of the first oil outlet pipe 209 detects the increase in oil pressure and sends a signal. The first oil pump gear 211 and the second oil pump gear 229 in the pump housing 205 are affected. The resistance increases and the rotation lags behind the first rotating shaft 218. The vortex spring 225 is further compressed, and the limit block 221 moves from one end of the limit groove 215 to the extreme position at the other end. At the same time, the first oil pumping gear 211 moves axially for a certain distance under the interaction of the external thread 222 on the first rotating shaft 218 and the internal thread 213 on the inner wall of the first oil pumping gear 211. The first oil pumping gear 211 drives the sealing plate 234 to move axially synchronously through the guide ring 235, and finally makes the first oil pumping gear 211 and the second oil pumping gear 229 aligned with the pump housing 205 and the sealing plate. A large gap is generated between the inner walls of 234, so that the oil inlet 206 and the oil outlet 207 on both sides of the pump housing 205 are directly connected, thereby reducing the oil pressure in the pump housing 205 and reducing the oil pumping amount of the first oil pumping gear 211 and the second oil pumping gear 229. Under the action of oil pressure, the organic oil in the first cylinder 243 is filtered in the second filter cylinder 262 in the reverse direction and enters the second filter cylinder 262 and the second ring sleeve 240. The amount of oil entering the second filter cylinder 262 and the second ring sleeve 240 gradually increases. When the second filter cylinder 262 and the second ring sleeve 240 are When the oil in 240 and the second oil outlet pipe 248 accumulates to a certain amount and obtains a certain oil pressure, the baffle 253 in the valve assembly 252 will overcome the leaf spring 254 and open under the action of the oil pressure below, and the oil in the second oil outlet pipe 248 enters the parts that need lubrication in the crankcase 101 through the oil cavity 249 and the third oil outlet pipe 250 or enters the second cylinder 247 through the fourth oil outlet pipe 251. The oil entering the second cylinder 247 also enters the parts that need lubrication in the crankcase 101 through the fourth oil outlet pipe 251, the oil cavity 249 and the third oil outlet pipe 250.

[0041] If the oil pressure continues to remain high, it means that the first filter cartridge 256 is clogged and needs to be replaced. If the oil pressure gradually decreases and returns to normal after being at high pressure, it means that the oil pressure in the pump housing 205 of the oil pump assembly 204 is increased in a short period of time due to the short-term high rotation speed of the first oil pumping gear 211 on the first rotating shaft 218 driven by the crankshaft end 102. After the speed of the first rotating shaft 218 driven by the crankshaft end 102 decreases, the oil pumping amounts of the first oil pumping gear 211 and the second oil pumping gear 229 decrease due to the reduction in rotation speed, causing the first oil pumping gear 211 and the second oil pumping gear 229 to increase in a short period of time. The resistance encountered by the second oil pumping gear 229 gradually decreases, and finally the first oil pumping gear 211 rotates and resets relative to the first rotating shaft 218 under the action of the vortex spring 225 and rotates synchronously with the first rotating shaft 218. The first oil pumping gear 211 is axially reset relative to the first rotating shaft 218, and the first oil pumping gear 211 drives the sealing plate 234 to reset, and finally the first oil pumping gear 211 and the second oil pumping gear 229 complete the initial state of the tiny gap fit with the inner wall of the pump housing 205 and the sealing plate 234, so that the oil inlet 206 and the oil outlet 207 on the pump housing 205 are blocked, so that the oil pump assembly can perform normal oil pumping operation.

[0042] When the first filter cartridge 256 becomes clogged and the oil passage needs to be switched, the sealing cover 269 is rotated. The sealing cover 269 drives the third cylinder 258 to rotate a slight angle relative to the first cylinder 243 through the two third sealing rings 275, so that the third cylinder 258 closes the first oil hole 244 on the first cylinder 243. As a result, the engine oil pumped into the first cylinder 243 by the oil pump assembly no longer flows toward the first filter cartridge 256 through the first oil hole 244 on the first cylinder 243. When the engine oil entering the first cylinder 243 reaches a certain oil pressure, it overcomes the centrifugal force of the centrifugal strips 266 on the second filter cartridge 262 and is filtered by the second filter cartridge 262, and flows back into the second filter cartridge 262. The engine oil entering the second filter cartridge 262 is pushed open by the second ring sleeve 240 and the second oil outlet pipe 248 to enter the oil chamber 249 after the baffle 253 is pushed open. The engine oil entering the oil chamber 249 reaches the parts of the crankcase 101 that need lubrication through the third oil outlet pipe 250.

Claims

1. An engine crankcase cover plate assembly and crankcase, characterized in that: include: The camshaft is a shaft that is connected to the oil pump of the oil pump assembly and the oil pump is connected to the oil pump assembly through the oil pump housing. The camshaft is connected to the oil pump assembly through the oil pump housing. The camshaft is connected to the oil pump assembly through the oil pump housing. The camshaft is connected to the oil pump assembly through the oil pump housing.

2. An engine crankcase cover plate assembly and crankcase according to claim 1, characterized in that: The side end cover is connected to the side end of the crankcase by bolts, and a first sealing gasket is provided between the side end cover and the crankcase.

3. The engine crankcase cover plate assembly and crankcase according to claim 1, characterized in that: The oil pump assembly comprises a pump casing with an opening at the lower end, an oil inlet and an oil outlet being relatively formed on both sides of the middle of the pump casing, the oil inlet is connected to the bottom of the crankcase through an oil suction pipe, and the oil outlet is connected to the oil circuit rotating assembly through a first oil outlet pipe. The top of the pump casing is provided with a second axial hole and a third axial hole, the second axial hole and the third axial hole are symmetrically distributed on both sides of the axis of the oil inlet or the oil outlet, a first rotating shaft and a second rotating shaft connected to the crankshaft end are rotatably provided in the second axial hole and the third axial hole respectively, a first oil pumping gear is provided on the first rotating shaft and a clearance is matched with the inner wall of the pump casing, a second annular groove is provided on the inner wall of the fourth axial hole of the first oil pumping gear, and a second annular groove is provided on the inner wall of the upper end of the second annular groove of the fourth axial hole The internal thread cooperates with the external thread on the rotating shaft, and the inner wall of the second annular groove at the lower end of the fourth shaft hole is provided with a limiting groove that cooperates with the upper limit block of the first rotating shaft, and a first ring sleeve is slidably provided on the first rotating shaft, and the first ring sleeve is rotatably set in the second annular groove, and a vortex spring is connected between the first ring sleeve and the inner wall of the second annular groove, and a second oil pump gear is provided on the second rotating shaft, which is meshed with the first oil pump gear and has a clearance with the inner wall of the pump housing, and a sealing plate that seals it slides vertically in the pump housing, and a guide ring is provided on the inner side of the sealing plate, and the guide ring is rotatably set in the first annular groove on the lower end surface of the first oil pump assembly, and a sealing cover that seals it is installed at the lower end opening of the pump housing by bolts, and an air pressure balance hole is provided on the sealing cover.

4. An engine crankcase cover plate assembly and crankcase according to claim 3, characterized in that: An oil pressure sensor is installed on the wall of the first oil outlet pipe through a branch pipe.

5. The engine crankcase cover plate assembly and crankcase according to claim 3, characterized in that: The upper end of the second rotating shaft is provided with a second limit sleeve which cooperates with the top of the pump casing through bolts, and the top of the pump casing is provided with a first limit sleeve which rotates with the annular convex on the first rotating shaft through bolts. The first rotating shaft is provided with two guide keys which are 180 degrees apart in the circumferential direction, and the guide keys slide in the keyway on the inner wall of the first ring sleeve. The sealing plate is provided with a guide sleeve which slides with the inner wall of the pump casing, and a second sealing gasket is provided between the first ring plate and the pump casing.

6. The engine crankcase cover plate assembly and crankcase according to claim 3, characterized in that: A first gear is provided at the upper end of the first rotating shaft, and the first gear is engaged with the second gear at the crankshaft end.

7. The engine crankcase cover plate assembly and crankcase according to claim 3, characterized in that: The oil circuit conversion assembly includes a first ring plate arranged on the top of the pump casing by bolts, a coaxial second ring sleeve and a first cylinder are provided on the first ring plate, an annular gap is formed between the first cylinder and the second ring sleeve, a third ring plate is provided on the outer side of the first cylinder, a second cylinder is provided on the third ring plate, an annular space is formed between the second cylinder and the first cylinder, the cylinder wall of the first cylinder is evenly and densely provided with first oil holes, and the first oil holes are located above the third ring plate, a third ring sleeve is provided on the upper end of the second ring sleeve through the second ring plate, a second filter cartridge with an upper end seal is inserted into the third ring sleeve, a rotary sealing sleeve is matched between the second filter cartridge and the third ring sleeve, the lower end of the second filter cartridge is provided with a hexagonal shaft matched with the hexagonal groove at the upper end of the second rotating shaft through a connecting rod, a first slot is provided on the third ring plate, the first slot is inserted with the first filter cartridge that divides the annular space between the second cylinder and the first cylinder into two annular spaces, and a third slot with an upper end seal is provided on the outer side of the first cylinder. Cylinder, second oil holes corresponding to the first oil holes are evenly and densely distributed on the wall of the third cylinder, and the top of the second filter cylinder is provided with a positioning shaft, and the positioning shaft is arranged in a swivel seat at the top of the third cylinder. The top of the second cylinder is threadedly connected to a sealing cover, and the top of the sealing cover is provided with a second slot that cooperates with the second cylinder, a third slot that cooperates with the first filter cylinder, and a fourth slot that cooperates with the fourth ring sleeve at the top of the third cylinder. A first sealing ring is matched between the inner wall of the second slot and the second cylinder, a second sealing ring is matched between the inner wall of the third slot and the inner and outer walls of the first filter cylinder, and a third sealing ring is matched between the fourth slot and the inner and outer walls of the fourth ring sleeve. A second oil outlet pipe communicating with the interior is provided on the wall surface of the second ring sleeve, and the upper end of the second oil outlet pipe is connected to the third oil outlet pipe through the oil chamber, and a fourth oil outlet pipe communicating with the second cylinder is provided on the wall surface of the oil chamber. A valve assembly that can only be opened under the action of oil pressure therein is provided at the upper end pipe mouth of the second oil outlet pipe.

8. The engine crankcase cover plate assembly and crankcase according to claim 7, characterized in that: The valve assembly includes a baffle, which is hinged to the pipe opening at the upper end of the second oil outlet pipe, and a leaf spring is connected between the baffle and the inner wall of the oil chamber.

9. The engine crankcase cover plate assembly and crankcase according to claim 7, characterized in that: The inner wall of the first filter cartridge is densely covered with messy soft hairs.

10. The engine crankcase cover plate assembly and crankcase according to claim 7, characterized in that: The outer wall of the second filter cartridge is circumferentially provided with a plurality of centrifugal strips for enhancing the centrifugal effect thereof.

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