A cylinder assembly having a crankcase cavity exhaust passage

Abstract

The application discloses a cylinder assembly with a crankshaft cavity exhaust passage and relates to the technical field of engines.The cylinder assembly comprises a crankcase, the bottom of the crankcase is provided with an oil pan, the top of the crankcase is provided with a cylinder hole, the inner side of the cylinder hole is provided with a piston, the inner side of the crankcase is rotatably provided with a crankshaft, and the crankshaft and the piston are rotatably connected through a connecting rod; and the cylinder assembly further comprises an anti-emulsification assembly, and the anti-emulsification assembly comprises a follow-up pumping piece.The anti-emulsification assembly is arranged, the crankshaft is connected with a multi-directional pumping piece, the inside of the crankcase is continuously dried and purified, the generation of condensed water is reduced from the source, the hidden troubles of oil emulsification under extremely cold and long-term short-distance working conditions are completely relieved, the swingable pumping bucket covers the multidirectional space in the crankcase, a large amount of oil mist generated when the oil is violently shaken is timely guided and separated, the probability of the occurrence of faults, such as the aggravation of oil seal leakage and oil deterioration caused by the uneven local oil and gas pressure, is greatly reduced, and the complex use scenarios of various non-paved roads and extremely cold areas are adapted.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and more specifically to a cylinder assembly with a crankshaft cavity exhaust passage. Background Technology

[0002] The crankcase ventilation system is an important component of an internal combustion engine. Its function is to promptly expel the air-fuel mixture (mainly including unburned combustible mixture, burned exhaust gas, and water vapor) that enters the crankcase from the combustion chamber during engine operation, in order to maintain pressure balance in the crankcase and prevent oil deterioration and corrosion of engine parts.

[0003] Under extreme cold and long-distance short-distance driving conditions, water vapor condensing in different areas of the crankcase cannot be fully extracted and discharged, and is very likely to accumulate in the dead corners of the cavity. It eventually mixes with the engine oil to form emulsified foam, which directly damages the lubricating performance of the engine oil. At the same time, the existing ventilation system has fixed air extraction points and cannot cover the multi-directional space inside the crankcase. Under long-term bumpy conditions, a large amount of oil mist generated when the engine oil in the oil pan shakes violently cannot be guided and separated in time, which can easily lead to uneven local oil and gas pressure, exacerbating hidden faults such as oil seal leakage and engine oil deterioration. Summary of the Invention

[0004] The purpose of this invention is to provide a cylinder assembly with a crankshaft cavity exhaust channel, which solves the problem that in traditional devices, under special operating conditions such as extreme cold and long-distance short-distance driving, water vapor condensed in different areas of the crankcase inner wall cannot be fully extracted and discharged, eventually mixing with the engine oil to form emulsified foam. The existing ventilation system has a fixed air extraction point, and the large amount of oil mist generated when the engine oil in the oil pan shakes violently cannot be guided and separated in time, which easily leads to uneven local oil and gas pressure, aggravating hidden faults such as oil seal leakage and engine oil deterioration.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution: A cylinder assembly with a crankshaft cavity exhaust passage, comprising: A crankcase, wherein an oil pan is provided at the bottom of the crankcase, a cylinder bore is provided at the top of the crankcase, a piston is provided inside the cylinder bore, a crankshaft is rotatably mounted inside the crankcase, and the crankshaft and the piston are rotatably connected by a connecting rod. An anti-emulsification component includes a follower-driven pumping component, a drying component, and a multi-directional suction component. The follower-driven pumping component is connected to the drying component and the multi-directional suction component. The follower-driven pumping component includes a first synchronizing component and a mounting plate fixed to the bottom of the oil pan. A cylinder is fixed to one side of the mounting plate, and a piston plate is provided inside the cylinder. A hollow column is fixed to one side of the piston plate. A reciprocating screw is rotatably mounted on the mounting plate. One end of the reciprocating screw extends to the inside of the hollow column, and the hollow column is threaded onto the reciprocating screw. The other end of the reciprocating screw is connected to the first synchronizing component. A crossbar is fixed to the inside of the mounting plate, and the hollow column slides on the crossbar.

[0006] Preferably, the drying component includes a drying mechanism, with an air inlet pipe and an air outlet pipe fixed on one side of the drying mechanism. One end of the air inlet pipe and the air outlet pipe are connected to one end of the cylinder, and an air supply pipe is fixed on the other side of the drying mechanism.

[0007] Preferably, the multi-directional air extraction component includes a second synchronizing component, a horizontal swing component, a vertical swing component, and an air extraction head. The air extraction head includes an air extraction bucket, one end of which is connected to the air inlet of the oil-gas separator via a pipe, and the air outlet of the oil-gas separator is fixedly connected to one end of the air supply pipe via a pipe body.

[0008] Preferably, the suction head is provided with an outlet groove, a support arm is fixed to the inner side of the suction head, a scraper rod is rotatably mounted on the support arm, one end of the scraper rod extends to the inner side of the outlet groove, and the other end of the scraper rod is fixed with an extension shaft.

[0009] Preferably, the horizontal swing member includes a reciprocating threaded rod, an L-shaped connecting arm, and a guide rod connected to the second synchronizing member. A movable seat is threadedly connected to the reciprocating threaded rod, and the movable seat is slidably sleeved on the guide rod. A through shaft is fixed to the top of the movable seat. A through groove is opened on the L-shaped connecting arm, and the through shaft passes through the inner side of the through groove.

[0010] Preferably, the vertical swing member includes an upper mounting bracket fixed to the inner wall of the crankcase, a lower mounting bracket fixed to the inner wall of the crankcase, and a swing column rotating at one end of the L-shaped connecting arm. An arc-shaped strip is fixed to one side of the upper mounting bracket, and an arc-shaped plate is fixed to one side of the lower mounting bracket. A magnetic plate and a rubber insulating strip are fixed to the bottom of the arc-shaped strip, and a magnetic sheet is fixed to the top of the swing column.

[0011] Preferably, the L-shaped connecting arm rotates at the bottom of the upper mounting frame, one end of the guide rod is fixed to the lower mounting frame by a connecting plate, and one end of the swing column is fixedly connected to one end of the suction bucket.

[0012] Preferably, two horizontal support plates are fixed between the upper mounting frame and the lower mounting frame, and two rotation aid bars are fixed to the top of the upper mounting frame.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: By incorporating anti-emulsification components and relying on crankshaft-linked multi-directional air extraction components, continuous drying and purification of the gas inside the crankcase is achieved, reducing the generation of condensate at its source and completely alleviating the risk of oil emulsification under extremely cold and long-term short-distance operating conditions. The swingable air extraction bucket covers multiple spaces inside the crankcase, promptly guiding and separating the large amount of oil mist generated when the oil shakes violently, greatly reducing the probability of oil seal leakage, oil deterioration, and other faults caused by uneven local oil and gas pressure. It is suitable for various complex usage scenarios in unpaved roads and extremely cold regions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention when the drill bit is not started; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a partial cross-sectional view of the antiemulsification component in this invention; Figure 4 for Figure 3 A schematic diagram of the follower-driven pusher component; Figure 5 This is a split sectional view of the multi-directional air extraction component in this invention; Figure 6 for Figure 5 Enlarged schematic diagram of part A in the middle.

[0015] 1. Crankcase; 2. Oil pan; 3. Cylinder bore; 4. Piston; 5. Crankshaft; 6. Anti-emulsification component; 61. First synchronization component; 62. Mounting plate; 63. Cylinder; 64. Piston plate; 65. Hollow column; 66. Reciprocating screw; 67. Drying mechanism; 68. Inlet pipe; 69. Outlet pipe; 610. Gas delivery pipe; 611. Second synchronization component; 612. Air extraction head; 6121. Air extraction hopper; 6122. Oil-gas separator; 6123. Outlet trough; 6124. Support arm; 6125. Scraper bar; 6126. Extension shaft; 613. Reciprocating threaded rod; 614. L-shaped connecting arm; 615. Guide rod; 616. Crossbar; 617. Moving seat; 618. Through shaft; 619. Through slot; 620. Upper mounting bracket; 621. Lower mounting bracket; 622. Swing column; 623. Arc strip; 624. Arc plate; 625. Magnetic plate; 626. Rubber isolation strip; 627. Magnetic sheet; 628. Horizontal support plate; 629. Rotation aid bar. Detailed Implementation

[0016] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0017] This invention provides a technical solution: a cylinder assembly with a crankshaft cavity exhaust passage, such as... Figures 1-6 As shown, the crankcase includes a crankcase 1 and an anti-emulsification component 6. An oil pan 2 is provided at the bottom of the crankcase 1, and a cylinder bore 3 is provided at the top of the crankcase 1. A piston 4 is provided inside the cylinder bore 3, and a crankshaft 5 is rotatably mounted inside the crankcase 1. The crankshaft 5 and the piston 4 are rotatably connected by a connecting rod. The crankcase 1, oil pan 2, cylinder bore 3, piston 4, crankshaft 5, and the connection between the crankshaft 5 and the piston 4 via the connecting rod are all existing mature technical structures well known to those skilled in the art. Their working principles and wiring methods are commonplace and belong to conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0018] The anti-emulsification component 6 includes a follower-driven ejector, a dryer, and a multi-directional air extraction component. The follower-driven ejector is connected to the dryer and the multi-directional air extraction component. The follower-driven ejector includes a first synchronizing element 61 and a mounting plate 62 fixed to the bottom of the oil pan 2. A cylinder 63 is fixed to one side of the mounting plate 62, and a piston plate 64 is provided inside the cylinder 63. Two holes are opened at one end of the cylinder 63, while a hole of a certain size is left at the end where the cylinder 63 connects to the mounting plate 62 to maintain airflow and air pressure balance, so as to ensure that the piston plate 64 can move smoothly in the cylinder 63. A hollow column 65 is fixed at the central axis of one side of the plug plate 64 (the side with the hole, that is, the side facing the mounting plate 62). A reciprocating screw 66 rotates on the mounting plate 62. One end of the reciprocating screw 66 extends to the inside of the hollow column 65. The hollow column 65 is threaded to the reciprocating screw 66. The other end of the reciprocating screw 66 is connected to the first synchronizing member 61. A crossbar 616 is fixed to the inside of the mounting plate 62. The hollow column 65 slides on the crossbar 616 to prevent the hollow column 65 from rotating as the reciprocating screw 66 rotates.

[0019] The drying component includes a drying mechanism 67, which is used to dry the gas. The drying component can be a molecular sieve (especially type 3A) or a silica gel dryer, both of which can be regenerated by heating. An inlet pipe 68 and an outlet pipe 69 are fixed to one side of the drying mechanism 67. One end of the inlet pipe 68 and the outlet pipe 69 are respectively connected to two holes opened at one end of the cylinder 63. A gas delivery pipe 610 is fixed to the other side of the drying mechanism 67. The inlet pipe 68, the outlet pipe 69, and the gas delivery pipe 610 are all connected to the drying mechanism 67 by detachable fixing means, facilitating... The drying mechanism 67 can be removed and replaced or maintained later. Both the inlet pipe 68 and the outlet pipe 69 are equipped with one-way valves. The one-way valve in the inlet pipe 68 can only allow gas to enter the cylinder 63, and the one-way valve in the outlet pipe 69 can only allow gas to return from the cylinder 63 to the drying mechanism 67 and the gas delivery pipe 610. As is well known to those skilled in the art, the working principle and wiring method of the one-way valve are common and are all conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selection according to their needs or convenience.

[0020] The multi-directional exhaust system includes a second synchronizing element 611, a horizontal swing element, a vertical swing element, and an exhaust head 612. The exhaust head 612 includes an exhaust hopper 6121, one end of which is connected to the air inlet of the oil-gas separator 6122 via a pipe. The core function of the oil-gas separator 6122 is gas-liquid separation, which involves removing the oil droplets (liquid) mixed in with the blow-by gas in the crankcase 1, allowing the pure gas (water vapor, exhaust gas) to continue to be transported to the air supply pipe 610 and the drying mechanism 67. Since the molecular sieve is oil-sensitive, the presence of the oil-gas separator 6122 is essential. The outlet of the oil-gas separator 6122 is fixedly connected to one end of the pipe body and the gas supply pipe 610. Since it is an existing mature technology and means, the working principle and wiring method are common and routine, and will not be described in detail here. Those skilled in the art can make any selection according to their needs or convenience. The oil return end of the oil-gas separator 6122 is connected to the oil pan 2 through a pipe. This is the channel for the separated liquid engine oil to flow back to the engine. The pipe is an oil-resistant rubber tube, which connects the oil return port at the bottom of the separator to the oil pan 2 or the engine oil filler port.

[0021] The horizontal swing component includes a reciprocating threaded rod 613, an L-shaped connecting arm 614, and a guide rod 615 connected to the second synchronizing component 611. A movable seat 617 is threadedly connected to the reciprocating threaded rod 613. The movable seat 617 is slidably sleeved on the guide rod 615. A through shaft 618 is fixed to the top of the movable seat 617. A through groove 619 is provided on the L-shaped connecting arm 614. The position of the through groove 619 is as follows: Figure 5 As shown, the through shaft 618 is inserted into the inside of the through groove 619.

[0022] The first synchronizing element 61 and the second synchronizing element 611 have the same structure, both consisting of two chain pulleys and a chain ring meshing between the two chain pulleys. One chain pulley in the first synchronizing element 61 and the second synchronizing element 611 is fixed at both ends of the crankshaft 5, while the other chain pulley in the first synchronizing element 61 rotates on one side of the mounting plate 62. One end of the reciprocating screw 66 is fixedly connected to the central shaft of the chain pulley. The other chain pulley in the second synchronizing element 611 rotates on one side of the crankcase 1 (on the same side as the chain pulley fixed at one end of the crankshaft 5). One end of the reciprocating threaded rod 613 is fixed to the central shaft of the chain pulley. The diameter of the two chain pulleys in the first synchronizing element 61 and the second synchronizing element 611 can be set according to the actual situation.

[0023] The vertical swing element includes an upper mounting bracket 620 fixed to the inner wall of the crankcase 1, a lower mounting bracket 621 fixed to the inner wall of the crankcase 1, and a swing column 622 rotating at one end of an L-shaped connecting arm 614. The L-shaped connecting arm 614 rotates at the bottom of the upper mounting bracket 620. One end of a guide rod 615 is fixed to the lower mounting bracket 621 via a connecting plate. One end of the swing column 622 is fixedly connected to one end of a suction hopper 6121. An arc-shaped strip 623 is fixed to one side of the upper mounting bracket 620, and an arc-shaped plate 624 is fixed to one side of the lower mounting bracket 621. The arc-shaped strip 623 and the arc-shaped plate 624 have the same dimensions and curvature. A magnetic plate 625 is fixed to the bottom of the arc-shaped strip 623. A rubber isolating strip 626 and a magnetic sheet 627 are fixed to the top of the swing column 622. Multiple magnetic plates 625 are set on the arc-shaped strip 623 (the specific number depends on the length of the arc-shaped strip 623 and the width of the swing column 622). All magnetic plates 625 are evenly distributed (the distance between two adjacent magnetic plates 625 should be slightly larger than the width of the swing column 622). Rubber isolating strips 626 are set on both sides of each magnetic plate 625 to prevent the swing column 622 and the arc-shaped strip 623 from colliding directly when the swing column 622 is deflected by the attraction to the arc-shaped strip 623. It should be noted that if the magnetic plate 625 is N pole, then the magnetic sheet 627 is S pole.

[0024] An exhaust groove 6123 is provided at the lower position on the exhaust head 612. Multiple exhaust grooves 6123 can be provided; in this embodiment, only one exhaust groove 6123 is provided. If multiple exhaust grooves 6123 are to be designed, they can be arranged in a row to ensure timely extraction of oil mist from the inner wall of the exhaust head 612. A support arm 6124 is fixed to the inner side of the exhaust head 612, and a scraper rod 6125 rotates on the support arm 6124. One end of the scraper rod 6125 extends into the inner side of the exhaust groove 6123. It should be noted that the number of protrusions on the end of the scraper rod 6125 that passes through the exhaust groove 6123 depends on the number of exhaust grooves 6123. One protrusion extends into each exhaust groove 6123. The other end of the scraper rod 6125 is fixed with an extension shaft 6126. Figure 6 As shown, one end of the scraper rod 6125 with an extension shaft 6126 extends to the top of the outer side of the suction head 612. When the scraper rod 6125 deflects around the position of the support arm 6124, the end of the scraper rod 6125 extending to the top of the suction head 612 deflects along the outer wall of the suction head 612, and the end extending to the inner side of the outlet groove 6123 deflects along the opening area of ​​the outlet groove 6123, thereby scraping through the oil accumulated inside the outlet groove 6123 and keeping the outlet groove 6123 unobstructed. Two horizontal support plates 628 are fixed between the upper mounting bracket 620 and the lower mounting bracket 621. The two horizontal support plates 628 are respectively located near the arc. The positions of the two ends of the shaped strip 623, and the corresponding positions of the arc-shaped strip 623 above one end of the horizontal support plate 628, are the edges of a magnetic plate 625. When the swing column 622 reaches the area above the horizontal support plate 628, it will swing downwards without magnetic attraction. Supported by the horizontal support plate 628, the swing column 622 is set horizontally. Two auxiliary rotation bars 629 are fixed on the top of the upper mounting frame 620. When the swing column 622 is in a horizontal state, the extension shaft 6126 will be in a vertical state. When the L-shaped connecting arm 614 drives the air extraction head 612 to deflect horizontally through the swing column 622, the extension shaft 6126 will be blocked by the auxiliary rotation bars 629, thereby causing the scraper rod 6125 to deflect.

[0025] In use: When the device is turned on, the crankshaft 5 will start to rotate and drive the piston 4 to move up and down reciprocally inside the cylinder bore 3 via the connecting rod. At the same time, the first synchronizing element 61 and the second synchronizing element 611 will drive the reciprocating screw 66 and the reciprocating threaded rod 613 to rotate respectively. When the reciprocating screw 66 rotates, the hollow column 65 will move laterally along the reciprocating screw 66. When the hollow column 65 drives the piston plate 64 to move closer to the mounting plate 62, the piston plate 64 will expel the gas (containing water vapor and oil mist) inside the crankcase 1. The gas is drawn from the vacuum hopper 6121 into the oil-gas separator 6122 for oil-gas separation. The separated gas will enter the gas delivery pipe 610 through the pipe body, and then enter the drying mechanism 67 for gas drying. The dried gas will enter the inner side of the cylinder 63 through the inlet pipe 68. After the hollow column 65 moves to the end of the reciprocating screw 66 near the mounting plate 62 and then moves back, the piston plate 64 will push the dried gas in the cylinder 63 into the outlet pipe 69, and then send it into the vacuum hopper 6121 through the drying mechanism 67 and the gas delivery pipe 610 to fill the crankcase 1.

[0026] During the rotation of the reciprocating threaded rod 613, the movable seat 617 reciprocates on the reciprocating threaded rod 613. The movable seat 617 drives the through shaft 618 to move laterally. The through shaft 618 slides in the through groove 619 and drives the L-shaped connecting arm 614 to swing repeatedly in the horizontal direction through shearing force. When the L-shaped connecting arm 614 swings, it drives the suction bucket 6121 to swing in the horizontal direction through the swing column 622. During the swing of the swing column 622, when it swings to the corresponding position of the magnetic plate 625, it will be attracted by the magnetic plate 625 and the magnetic sheet 627. The force drives the suction bucket 6121 to swing upward. The swing column 622 will stop swinging after contacting the rubber isolation strip 626. The rubber isolation strip 626 can buffer the swing column 622 and the arc strip 623 to avoid collision and damage. When the swing column 622 deflects to the distance between two adjacent magnetic plates 625, the swing column 622 will fall down by itself (i.e., deflect downward) under the action of no magnetic attraction. This realizes the up and down swing of the suction bucket 6121 and realizes the bidirectional suction angle (i.e. horizontal angle and vertical angle) adjustment of the suction bucket 6121. When the swing column 622 swings to the area of ​​the horizontal support plate 628, without the magnetic attraction of the magnetic plate 625, it will fall and deflect onto the horizontal support plate 628 and become horizontal. Under the driving force of the swing column 622 being continuously deflected horizontally by the L-shaped connecting arm 614, the extension shaft 6126 will be blocked by the auxiliary rotation bar 629, which will cause the scraper bar 6125 to deflect. The auxiliary rotation bar 629 at both ends of the arc bar 623 will cause the scraper bar 6125 to deflect in different directions, thereby realizing that the scraper bar 6125 automatically scrapes away the material blocking the outlet groove 6123.

[0027] The above description is merely a preferred embodiment of the present invention and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.

Claims

1. A cylinder assembly having a crankshaft cavity exhaust passage, characterized in that, include: A crankcase (1) is provided with an oil pan (2) at the bottom of the crankcase (1) and a cylinder bore (3) is provided at the top of the crankcase (1). A piston (4) is provided inside the cylinder bore (3). A crankshaft (5) is rotatably mounted inside the crankcase (1). The crankshaft (5) and the piston (4) are rotatably connected by a connecting rod. An anti-emulsification component (6) includes a follower-up pumping component, a drying component, and a multi-directional suction component. The follower-up pumping component is connected to the drying component and the multi-directional suction component. The follower-up pumping component includes a first synchronizing component (61) and a mounting plate (62) fixed to the bottom of the oil pan (2). A cylinder (63) is fixed to one side of the mounting plate (62). A piston plate (64) is provided on the inner side of the cylinder (63). One side of the piston plate (64) A hollow column (65) is fixed thereon, and a reciprocating screw (66) is rotatably mounted on the mounting plate (62). One end of the reciprocating screw (66) extends to the inner side of the hollow column (65), and the hollow column (65) is threadedly connected to the reciprocating screw (66). The other end of the reciprocating screw (66) is connected to the first synchronizing member (61). A crossbar (616) is fixed on the inner side of the mounting plate (62), and the hollow column (65) slides on the crossbar (616).

2. A cylinder assembly with a crankshaft cavity exhaust passage according to claim 1, characterized in that, The drying component includes a drying mechanism (67), on one side of which an air inlet pipe (68) and an air outlet pipe (69) are fixed. One end of the air inlet pipe (68) and the air outlet pipe (69) are connected to one end of the cylinder (63). The other side of the drying mechanism (67) is fixed with an air supply pipe (610).

3. A cylinder assembly with a crankshaft cavity exhaust passage according to claim 2, characterized in that, The multi-directional air extraction component includes a second synchronizing component (611), a horizontal swing component, a vertical swing component, and an air extraction head (612). The air extraction head (612) includes an air extraction bucket (6121). One end of the air extraction bucket (6121) is connected to the air inlet of the oil-gas separator (6122) through a pipe. The air outlet of the oil-gas separator (6122) is fixedly connected to one end of the pipe body and the gas transmission pipe (610).

4. A cylinder assembly with a crankshaft cavity exhaust passage according to claim 3, characterized in that, The suction head (612) is provided with an outlet groove (6123), and a support arm (6124) is fixed on the inner side of the suction head (612). A scraper rod (6125) is rotatably mounted on the support arm (6124). One end of the scraper rod (6125) extends to the inner side of the outlet groove (6123), and the other end of the scraper rod (6125) is fixed with an extension shaft (6126).

5. A cylinder assembly with a crankshaft cavity exhaust passage according to claim 3, characterized in that, The horizontal swing member includes a reciprocating threaded rod (613), an L-shaped connecting arm (614), and a guide rod (615) connected to the second synchronizing member (611). A movable seat (617) is threadedly connected to the reciprocating threaded rod (613). The movable seat (617) is slidably sleeved on the guide rod (615). A through shaft (618) is fixed to the top of the movable seat (617). A through groove (619) is opened on the L-shaped connecting arm (614). The through shaft (618) passes through the inner side of the through groove (619).

6. A cylinder assembly with a crankshaft cavity exhaust passage according to claim 5, characterized in that, The vertical swing member includes an upper mounting bracket (620) fixed to the inner wall of the crankcase (1), a lower mounting bracket (621) fixed to the inner wall of the crankcase (1), and a swing column (622) rotating at one end of the L-shaped connecting arm (614). An arc-shaped strip (623) is fixed on one side of the upper mounting bracket (620), and an arc-shaped plate (624) is fixed on one side of the lower mounting bracket (621). A magnetic plate (625) and a rubber insulating strip (626) are fixed at the bottom of the arc-shaped strip (623), and a magnetic sheet (627) is fixed at the top of the swing column (622).

7. A cylinder assembly with a crankshaft cavity exhaust passage according to claim 6, characterized in that, The L-shaped connecting arm (614) rotates at the bottom of the upper mounting frame (620), one end of the guide rod (615) is fixed to the lower mounting frame (621) by a connecting plate, and one end of the swing column (622) and one end of the suction bucket (6121) are fixedly connected.

8. A cylinder assembly with a crankshaft cavity exhaust passage according to claim 6, characterized in that, Two horizontal support plates (628) are fixed between the upper mounting bracket (620) and the lower mounting bracket (621), and two rotation aid bars (629) are fixed to the top of the upper mounting bracket (620).

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