A twin-cylinder horizontally opposed engine

Abstract

The present invention discloses a twin-cylinder horizontally opposed engine, comprising a cylinder body and a crankshaft; the cylinder body comprises a first cylinder body and a second cylinder body, the first cylinder body and the second cylinder body are connected in a horizontally opposed manner; a first shell is provided on the first cylinder body, and a second shell is provided on the second cylinder body; both ends of the crankshaft are rotatably connected to the connection between the first cylinder body and the second cylinder body, a first transmission gear and a second transmission gear are provided on the crankshaft, the first transmission gear and the second transmission gear are located on both sides of the rotation connection between one end of the crankshaft and the cylinder body, the first transmission gear corresponds to the first channel, and the second transmission gear corresponds to the second channel. The technical solution of the present invention achieves the optimization of light weight by reasonably arranging the first transmission gear and the second transmission gear on the crankshaft, so as to reduce the weight of the cylinder body, thereby reducing the weight of the entire drone.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to a twin-cylinder horizontally opposed engine. Background Art

[0002] Unmanned aerial vehicles, also known as "drones", are unmanned aircraft that are controlled by radio remote control equipment and self-contained program control devices, or are operated completely or intermittently autonomously by onboard computers. UAVs are divided into electric UAVs and oil-powered UAVs according to their driving methods. Among them, multi-rotor oil-powered UAVs have the advantages of flexibility, fast response, and low operating requirements. They are widely used in tasks such as agricultural plant protection, forest fire monitoring, aerial photography, land surveying, and post-disaster loss assessment.

[0003] At present, UAV engines include single-cylinder, twin-cylinder, in-line, four-cylinder, electric start, electronic injection, air-cooled and water-cooled series engines, most of which are twin-cylinder engines. However, the existing twin-cylinder engine design increases the weight of the engine cylinder, thereby increasing the weight of the entire UAV. Summary of the invention

[0004] In view of the above problems, the present invention proposes a twin-cylinder horizontally opposed engine, which reduces the weight of the cylinder body and thus reduces the weight of the entire UAV.

[0005] The present invention provides a two-cylinder horizontally opposed engine, comprising a cylinder body and a crankshaft; the cylinder body comprises a first cylinder body and a second cylinder body, the first cylinder body and the second cylinder body are horizontally connected; the first cylinder body is provided with a first shell, and the first shell is provided with a first channel that runs horizontally through; the second cylinder body is provided with a second shell, and the second shell is provided with a second channel that runs horizontally through; both ends of the crankshaft are rotatably connected to the connection between the first cylinder body and the second cylinder body, the crankshaft is provided with a first transmission gear and a second transmission gear, the first transmission gear and the second transmission gear are located on both sides of the rotational connection between one end of the crankshaft and the cylinder body, the first transmission gear corresponds to the first channel, and the second transmission gear corresponds to the second channel.

[0006] Preferably, the outer sides of the first cylinder body and the second cylinder body are both provided with a plurality of annular heat sinks arranged in parallel and of different sizes, at least one annular heat sink of the first cylinder body is connected to the first shell, and at least one annular heat sink of the second cylinder body is connected to the second shell.

[0007] Preferably, a first connecting hole and a second connecting hole for connecting the crankshaft are provided at the connection between the first cylinder body and the second cylinder body; one end of the crankshaft is rotatably connected to the inner wall of the first connecting hole through a first bearing, and the other end of the crankshaft is rotatably connected to the inner wall of the second connecting hole through a second bearing; the first transmission gear and the second transmission gear are located on both sides of the first bearing; a correcting bearing is provided at one end of the crankshaft, and one end of the crankshaft is rotatably connected to the inner wall of the first connecting hole through the correcting bearing, and the first bearing and the correcting bearing are located on both sides of the first transmission gear.

[0008] Preferably, a first connecting rod and a second connecting rod are rotatably connected to the crankshaft, a first swing ruler is provided on the first connecting rod, and a second swing ruler is provided on the second connecting rod; a first half oil storage chamber is provided on the side of the first cylinder body close to the second cylinder body, and a second half oil storage chamber is provided on the side of the second cylinder body close to the first cylinder body; the first cylinder body and the second cylinder body are oppositely connected to form an oil storage chamber by the first half oil storage chamber and the second half oil storage chamber; the first swing ruler and the second swing ruler are both located above the oil storage chamber.

[0009] Preferably, the two-cylinder horizontally opposed engine also includes a first belt and a second belt; the distal crankshaft end of the first channel of the first housing is rotatably connected to a first rotating rod, a first sprocket is sleeved on the first rotating rod, the first transmission gear and the first sprocket are connected through a first belt transmission, and the first belt is located in the first channel; the distal crankshaft end of the second channel of the second housing is rotatably connected to a second rotating rod, a second sprocket is sleeved on the second rotating rod, the second transmission gear and the second sprocket are connected through a second belt transmission, and the second belt is located in the second channel.

[0010] Preferably, an oil hole is provided on the first cylinder body, and a connecting ring extending outward is provided in the oil hole of the first cylinder body, an oil plug is connected to the inner thread of the connecting ring, an oil dipstick is provided on the oil plug, and the oil dipstick is arranged between the first connecting rod and the first bearing.

[0011] Preferably, an oil return hole is axially provided on the crankshaft, and the oil return hole is connected to the inner cavity of the first cylinder body; an annular groove coaxial with the crankshaft is provided at a rotational connection between the cylinder body and the crankshaft, and a through hole for connecting the oil return hole and the annular groove is provided on the crankshaft; an oil return channel is provided on the first cylinder body corresponding to the annular groove, and the oil outlet of the oil return channel is connected to the annular groove.

[0012] Preferably, the first cylinder body is provided with an oil-gas separation mechanism for separating the high-temperature mist oil in the cylinder body from the oil-gas separation mechanism, the oil-gas separation mechanism is provided with an oil drain hole, and the oil drain hole of the oil-gas separation mechanism is connected to the oil inlet of the oil return channel through a connecting pipe.

[0013] Preferably, the oil-gas separation mechanism includes a separation cylinder head, which is connected to the first cylinder body and is provided with an installation cavity, which is connected to the inner cavity of the first cylinder body; a separation box is provided on the separation cylinder head, which is provided with a first separation chamber, an oil storage chamber and a second separation chamber, a first notch connecting the first separation chamber and the oil storage chamber, and a second notch connecting the oil storage chamber and the second separation chamber; a cover plate is provided on the separation box, which is provided with an exhaust hole, which corresponds to the second separation chamber, and is arranged at one end of the second separation chamber far from the oil storage chamber; a separation hole connected to the installation cavity is provided at the bottom of the first separation chamber; an oil drain hole is provided at the bottom of the oil storage chamber, and the oil drain hole of the oil storage chamber is connected to the oil inlet of the return oil channel through a connecting pipe.

[0014] Preferably, the oil-gas separation mechanism also includes an opening and closing spring plate, one end of which is connected to the bottom surface of the first separation chamber, and the other end of the opening and closing spring plate is movably covered on the separation hole of the first separation chamber; a mounting plate connected to the first throttle assembly is provided in the mounting cavity of the separation cylinder cover, and the mounting plate divides the mounting cavity into a first chamber and a second chamber, and the first separation chamber is connected to the second chamber through the separation hole; an air flow hole is provided on the mounting plate, and the first separation chamber is connected to the second chamber through the separation hole.

[0015] The present invention has the following beneficial effects:

[0016] 1. The technical solution of the present invention achieves light weight optimization by rationally arranging the first transmission gear and the second transmission gear on the crankshaft, so as to reduce the weight of the cylinder body and thus reduce the weight of the entire UAV.

[0017] 2. The crankshaft drives the first connecting rod and the second connecting rod to reciprocate, and the first swing ruler of the first connecting rod and the second swing ruler of the second connecting rod cyclically and rapidly slap the engine oil in the oil storage chamber in the cylinder body, so that the engine oil splashes and forms mist engine oil in the inner cavity of the first cylinder body and the inner cavity of the first cylinder body, thereby lubricating various components in the cylinder body; at the same time, when the crankshaft rotates one circle, the first swing ruler and the second swing ruler can each slap the engine oil in the oil storage chamber once, which is equivalent to that the engine oil can be splashed twice when the crankshaft rotates one circle, thereby improving the formation efficiency of the mist engine oil and effectively improving the lubrication effect of various components in the cylinder body.

[0018] 3. The recovered engine oil is sent into the annular groove through the oil return channel for storage. When negative pressure appears in the inner cavity of the cylinder body, the through hole of the crankshaft is transferred to the engine oil stored in the annular groove, and the engine oil in the annular groove can be sent to the inner cavity of the cylinder body through the oil return hole of the crankshaft, so as to realize the automatic recycling of the recovered engine oil; at the same time, the engine oil stored in the annular groove is beaten on the inner wall of the oil return hole through the through hole of the crankshaft to form granular or mist-like engine oil, and the engine oil that has not formed granular or mist-like engine oil is beaten on the crankshaft along the oil return hole, and the part of the engine oil that has not formed granular or mist-like engine oil can be granulated or misted, so as to fully lubricate the components in the central area such as the crankshaft, thereby avoiding the phenomenon of insufficient lubrication of the components in the central area such as the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the crankshaft, the first belt and the second belt in one embodiment of the present invention;

[0021] Figure 3 is a transverse cross-sectional view of an embodiment of the present invention;

[0022] Figure 4 A longitudinal cross-sectional view of an embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the first cylinder body and the first sprocket in one embodiment of the present invention;

[0024] Figure 6 It is a schematic structural diagram of the cooperation between the first cylinder body and the oil-gas separation mechanism in one embodiment of the present invention;

[0025] Figure 7 It is a structural schematic diagram of an oil-gas separation mechanism in one embodiment of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the crankshaft, the first bearing and the deviation-correcting bearing in one embodiment of the present invention;

[0027] Fig. 9 Schematic diagram of the structure of a separation box in one embodiment of the present invention.

[0028] Reference numerals:

[0029] 1-cylinder body, 101-first cylinder, 102-second cylinder, 103-first shell, 104-first channel, 105-second shell, 106-second channel, 107-annular heat sink, 108-first connecting hole, 109-second connecting hole, 110-first bearing, 111-second bearing, 112-first half oil storage chamber, 113-second half oil storage chamber, 114-first piston, 115-second piston, 116-first rotating rod, 117-first sprocket, 118-first belt, 119-second belt, 120-second rotating rod, 121-second sprocket, 122-first beating hole, 123-first beating rib plate, 124-second beating hole, 125-second beating rib plate, 126-return oil channel, 127- Oil hole, 128-connecting ring, 129-oil plug, 130-oil dipstick, 131-correction bearing, 2-crankshaft, 201-first transmission gear, 202-second transmission gear, 203-first connecting rod, 204-second connecting rod, 205-first throw ruler, 206-second throw ruler, 207-first connecting shaft, 208-front connecting plate, 209-transition connecting plate, 210-rear connecting plate, 211-second connecting shaft, 212-oil return hole, 213-annular groove, 214-through hole, 3-first throttle assembly, 4-second throttle assembly, 5-oil and gas separation mechanism, 501-separation cylinder head, 502-installation cavity, 503-separation box, 504-first separation chamber, 505-oil storage chamber, 506-second separation chamber, 507- First notch, 508-second notch, 509-cover plate, 510-exhaust hole, 512-opening and closing spring, 513-first baffle plate, 514-second baffle plate, 516-mounting plate, 517-air flow hole, 518-first rib plate, 519-second rib plate, 520-oil drain hole. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0031] Example 1

[0032] like Figures 1 to 3 as well as Figure 8As shown, a two-cylinder horizontally opposed engine provided in this embodiment includes a cylinder body 1 and a crankshaft 2; the cylinder body 1 includes a first cylinder body 101 and a second cylinder body 102, and the first cylinder body 101 and the second cylinder body 102 are connected in a horizontally opposite manner. A first housing 103 is provided on the first cylinder body 101, and a first channel 104 is provided in the first housing 103 and a second channel 106 is provided in the second housing 105 and a second channel 106 is provided in the second housing 105 and a second channel 106 is provided in the second housing 105 and a second channel 106 is provided in the first housing 101 and a second channel 106 is provided in the second housing 105 and a second channel 106 is provided in the first housing 101 and a second channel 106 are provided in the second housing 105 ...6 and a first channel 101 are provided in the second housing 105 and a second channel 104 are provided in the first housing 104 and a second channel 106 are provided in the second housing 105 and a second channel 104 are provided in the second housing 105 and a second channel 104 are provided in the second housing 105 and a second channel 104 are provided in the second housing 105 and a second channel 104 are provided in the second housing 105 and a second channel 104 are provided in the second housing

[0033] The technical solution achieves the optimization of light weight by designing the first cylinder 101 and the second cylinder 102 to be horizontally opposed, and then designing the first transmission gear 201 and the second transmission gear 202 on both sides of the rotational connection between one end of the crankshaft 2 and the cylinder body 1. Because in the technical solution, any other arrangement of the first transmission gear 201 and the second transmission gear 202 will increase the weight of the first cylinder 101 or the second cylinder 102, the technical solution reduces the weight of the cylinder body through the reasonable arrangement of the first transmission gear 201 and the second transmission gear 202 on the crankshaft 2, thereby reducing the weight of the entire UAV.

[0034] In order to facilitate heat dissipation of the first cylinder 101 and the second cylinder 102, a plurality of annular heat sinks 107 of different sizes arranged in parallel are provided on the outer sides of the first cylinder 101 and the second cylinder 102. At least one annular heat sink of the first cylinder 101 is connected to the first housing 103, thereby improving the connection strength and structural strength of the first housing 103 and the first cylinder 101; at least one annular heat sink of the second cylinder 102 is connected to the second housing 105, thereby improving the connection strength and structural strength of the second housing 105 and the second cylinder 102.

[0035] Specifically, the connection between the first cylinder body 101 and the second cylinder body 102 is provided with a first connection hole 108 and a second connection hole 109 for connecting the crankshaft 2; one end of the crankshaft 2 is rotatably connected to the inner wall of the first connection hole 108 through the first bearing 110, and the other end of the crankshaft 2 is rotatably connected to the inner wall of the second connection hole 109 through the second bearing 111; the first transmission gear 201 and the second transmission gear 202 are located on both sides of the first bearing 110. In addition, a deviation correction bearing 131 is sleeved on one end of the crankshaft 2, and one end of the crankshaft 2 is rotatably connected to the inner wall of the first connection hole 108 through the deviation correction bearing 131, and the first bearing 110 and the deviation correction bearing 131 are located on both sides of the first transmission gear 201. The position design of the deviation correction bearing 131 improves the stability of the crankshaft 2 when it rotates, reduces the load of the crankshaft 2 when it rotates, and effectively avoids the phenomenon of the crankshaft 2 breaking when it rotates.

[0036] Example 2

[0037] like Figure 4 and Figure 5 As shown, the components included in this embodiment and their connection relationship are basically the same as those in Embodiment 1, except that the first connecting rod 203 and the second connecting rod 204 are rotatably connected to the crankshaft 2, the first connecting rod 203 is provided with a first throw-through ruler 205, and the second connecting rod 204 is provided with a second throw-through ruler 206; the first cylinder body 101 is provided with a first half oil storage chamber 112 on the side close to the second cylinder body, and the second cylinder body 102 is provided with a second half oil storage chamber 113 on the side close to the first cylinder body, and the first cylinder body 101 and the second cylinder body 102 are connected oppositely so that the first half oil storage chamber 112 and the second half oil storage chamber 113 form an oil storage chamber; the first throw-through ruler 205 and the second throw-through ruler 206 are both located above the oil storage chamber.

[0038] When the crankshaft drives the first connecting rod 203 and the second connecting rod 204 to rotate, the first swing ruler 205 of the first connecting rod 203 and the second swing ruler 206 of the second connecting rod 204 cyclically and rapidly slap the oil in the oil storage chamber in the cylinder body, so that the oil splashes and forms mist oil in the inner cavity of the first cylinder 101 and the inner cavity of the first cylinder 102, thereby lubricating various components in the cylinder body 1; in addition, in this technical solution, the first swing ruler 205 and the second swing ruler 206 can each slap the oil in the oil storage chamber once when the crankshaft 2 rotates one circle, which is equivalent to the oil splashing twice when the crankshaft 2 rotates one circle, effectively improving the lubrication effect of various components in the cylinder body 1, ensuring that the relevant components in the two-cylinder engine are fully lubricated, thereby extending the life cycle of the relevant components and reducing maintenance costs.

[0039] At the same time, the inner cavity of the first cylinder 101 is provided with a first piston 114 that is movable, and the distal end of the crankshaft of the first connecting rod 203 is hinged to the first piston 114; the inner cavity of the second cylinder 102 is provided with a second piston 115 that is movable, and the distal end of the crankshaft of the second connecting rod 204 is hinged to the second piston 115. The rotation of the crankshaft 2 can drive the first connecting rod 203 and the second connecting rod 204 to reciprocate back and forth, thereby simultaneously driving the first piston 114 and the second piston 115 to work in the first cylinder 101 and the second cylinder 102 respectively.

[0040] In this embodiment, in order to ensure the degree of atomization of the engine oil after the first throw ruler 205 and the second throw ruler 206 beat the engine oil, two arrangements of the first throw ruler 205 and the second throw ruler 206 are proposed. First, the first throw ruler 205 and the second throw ruler 206 are arranged in parallel. Second, the first throw ruler 205 and the second throw ruler 206 are arranged symmetrically relative to the crankshaft 2, and the angle between the first throw ruler 205 and the first connecting rod 203 is 80°-100°, and the angle between the second throw ruler 206 and the second connecting rod 204 is 80°-100°; if the angle between the first throw ruler 205 and the first connecting rod 203 is too large, or the angle between the second throw ruler 206 and the second connecting rod 204 is too large, the length of the first throw ruler 205 or the second throw ruler 206 will be increased, and the space of the oil storage chamber will also be increased, thereby increasing the volume of the first cylinder body 101 or the second cylinder body 102, and the first throw ruler 205 or the second throw ruler 206 will be increased. The material used increases, which increases the cost and the weight of the cylinder body 1; therefore, practice shows that the optimal angle between the first throw ruler 205 and the first connecting rod 203 is 80°-100°, and the optimal angle between the second throw ruler 206 and the second connecting rod 204 is 80°-100°, which can effectively reduce the cost and the weight of the cylinder body 1, while also ensuring the degree of atomization of the oil in the cylinder body 1, and can fully lubricate the various components in the cylinder body 1.

[0041] Specifically, the crankshaft 2 includes a first connecting shaft 207, a front connecting plate 208, a transition connecting plate 209, a rear connecting plate 210 and a second connecting shaft 211. The first transmission gear 201 and the second transmission gear 202 are both sleeved on the first connecting shaft 207. The front connecting plate 208, the transition connecting plate 209 and the rear connecting plate 210 are arranged in parallel with the same center line. The first connecting shaft 207 is connected to the front connecting plate 208, and the second connecting shaft 211 is connected to the rear connecting plate 209; the front connecting plate 208 and the transition connecting plate 209 are connected through the first transition shaft, and the transition connecting plate 209 and the rear connecting plate 210 are connected through the second transition shaft, and the first transition shaft and the second transition shaft are arranged in a staggered manner; a first connecting ring is provided at the crankshaft end of the first connecting rod 203, and the first connecting ring is movably sleeved on the first transition shaft. The first connecting ring is connected to the first throw ruler 205, and the first throw ruler 205 The length direction is consistent with the radial direction of the first connecting ring; the second connecting ring is provided at the crankshaft end of the second connecting rod 204, the second connecting ring is movably sleeved on the second transition shaft, the second connecting ring is connected to the second throw ruler, and the length direction of the second throw ruler is consistent with the radial direction of the second connecting ring. The first transmission gear 201 and the second transmission gear 202 are both sleeved on the first connecting shaft 207, the first connecting shaft 207 is rotatably connected to the inner wall of the first connecting hole 108 through the first bearing 110, and the second connecting shaft 211 is rotatably connected to the inner wall of the second connecting hole 109 through the second bearing 111.

[0042] In this embodiment, the engine lubrication system also includes a first belt 118 and a second belt 119; the distal crankshaft end of the first channel 104 of the first housing 103 is rotatably connected to the first rotating rod 116, and the first sprocket 117 is sleeved on the first rotating rod 116. The first transmission gear 201 and the first sprocket 117 are transmission-connected by the first belt 118, and the first belt 118 is located in the first channel; the distal crankshaft end of the second channel 106 of the second housing 105 is rotatably connected to the second rotating rod 120, and the second rotating rod 120 is sleeved on the second sprocket 121. The second transmission gear 202 and the second sprocket 121 are transmission-connected by the second belt 119, and the second belt 119 is located in the second channel 106. The first swing ruler 205 and the second swing ruler 206 beat the oil and splash it onto the first belt 118 and the second belt 119. The first belt 118 and the second belt 119 can bring the oil attached thereto to the corresponding first sprocket 117 and the second sprocket 121. Due to the centrifugal effect, the oil attached to the first belt 118 and the second belt 119 will be separated from the corresponding first sprocket 117 and the second sprocket 121 to form granular oil. In addition, during the process of the first transmission gear 201 driving the first sprocket 117 to rotate through the first belt 118, the operation of the first belt 118 will form a A circulating airflow is formed in the second channel 106, thereby bringing the mist oil above the oil storage chamber to the side of the first sprocket 117, and lubricating the throttle valve and its accessories, rocker arm, first rotating rod and other components of the first cylinder 101 near the first sprocket 117; in the process of the second transmission gear 202 driving the second sprocket 121 to rotate through the second belt 119, the operation of the first belt 118 will form a circulating airflow in the second channel 106, thereby bringing the mist oil above the oil storage chamber to the side of the second sprocket 121, and lubricating the throttle valve and its accessories, rocker arm, second rotating rod and other components of the second cylinder 102 near the second sprocket 121. Therefore, the design of the first sprocket 117, the second sprocket 121, the first belt 118 and the second belt 119 realizes the full lubrication of the components on the side of the first sprocket 117 of the first cylinder 101 and the components on the side of the second sprocket 121 of the second cylinder 102, ensuring that the components at the center or edge of the cylinder body 1 can be fully lubricated. Moreover, the liquid oil formed in the first channel 103 will flow back into the oil storage chamber along the bottom of the first channel 103, and the liquid oil formed in the second channel 106 will flow back into the oil storage chamber along the bottom of the second channel 106, thereby achieving primary recovery of the oil.

[0043] In order to perform secondary atomization on the mist oil or granular oil on the first sprocket 117 side and the second sprocket 121 side, the first sprocket 117 is provided with a plurality of first beating holes 122 evenly distributed in the circumferential direction, and a first beating rib plate 123 is formed between two adjacent first beating holes 122; the second sprocket 121 is provided with a plurality of second beating holes 124 evenly distributed in the circumferential direction, and a second beating rib plate 124 is formed between two adjacent second beating holes 124. When the mist oil or granular oil on the first sprocket 117 side enters the first beating hole 122, the rotation of the first sprocket 117 causes the first beating rib plate 123 to beat the mist oil or granular oil in the area of ​​the first beating hole 122, thereby realizing the second or secondary atomization of the mist oil or granular oil in the area of ​​the first beating hole 122. The secondary atomized mist oil or granular oil is more conducive to the lubrication of the throttle valve and its accessories, the rocker arm, the first rotating rod and other components; When the mist oil or granular oil on the side of the second sprocket 121 enters the second beating hole 124, the rotation of the second sprocket 121 causes the second beating rib plate 124 to beat the mist oil or granular oil in the area of ​​the second beating hole 124, thereby realizing the second or secondary atomization of the mist oil or granular oil in the area of ​​the second beating hole 124. The secondary atomized mist oil or granular oil is more conducive to the lubrication of the throttle valve and its accessories, rocker arm, second rotating rod and other components.

[0044] In this embodiment, the first throw ruler 205 and the second throw ruler 206 are both wedge-shaped, the large end of the first throw ruler is connected to the first connecting rod, and the small end of the first throw ruler is an arc surface; the large end of the second throw ruler is connected to the second connecting rod, and the small end of the second throw ruler is an arc surface. The wedge-shaped design of the first throw ruler 205 and the second throw ruler 206 improves the structural strength of the first throw ruler 205 and the second throw ruler 206. The arc surface small end design of the first throw ruler 205 and the second throw ruler 206 increases the contact area for beating the engine oil, and improves the efficiency of beating the engine oil into mist.

[0045] Example 3

[0046] like Figure 6 As shown, the components included in this embodiment and their connection relationship are basically the same as those of Embodiment 1 and Embodiment 2, except that an oil return hole 212 is axially provided on the crankshaft 2, and the oil return hole 212 is connected to the inner cavity of the first cylinder body 101; an annular groove 213 coaxial with the crankshaft 2 is provided at a rotational connection between the cylinder body 1 and the crankshaft 2, and a through hole 214 for connecting the oil return hole 212 and the annular groove 213 is provided on the crankshaft 2; an oil return channel 126 is provided on the first cylinder body 101 corresponding to the annular groove, and the oil outlet of the oil return channel 126 is connected to the annular groove 213.

[0047] In this technical solution, the recovered engine oil is sent to the annular groove 213 through the oil return channel 126 for storage. When negative pressure appears in the inner cavity of the cylinder body 1, the through hole 214 of the crankshaft 2 is transferred to the engine oil stored in the annular groove 213, and the engine oil in the annular groove 213 can be sent to the inner cavity of the cylinder body 1 through the oil return hole 212 of the crankshaft 2, so as to realize the automatic recycling of the recovered engine oil; at the same time, the engine oil stored in the annular groove 213 is beaten on the inner wall of the oil return hole 212 through the through hole 214 of the crankshaft 2 to form granular or mist-like engine oil, and the engine oil that has not formed granular or mist-like engine oil is beaten on the crankshaft along the oil return hole 212, and this part of the engine oil that has not formed granular or mist-like engine oil can be granulated or misted, so as to fully lubricate the components in the central area such as the crankshaft, thereby avoiding the phenomenon of insufficient lubrication of the components in the central area such as the crankshaft.

[0048] Specifically, the second connecting hole 109 includes a bearing connecting hole and a sealing connecting hole. The crankshaft 2 is rotatably connected to the inner wall of the bearing connecting hole through the second bearing 111. The crankshaft 2 is rotatably sealed to the sealing connecting hole through the first sealing ring. The second bearing 111 and the first sealing ring are arranged at a distance on the crankshaft, and an annular groove 213 is formed between the second bearing 111 and the first sealing ring. In this embodiment, the second connecting shaft 211 is provided with an oil return hole 212 in the axial direction, and the second connecting shaft 211 is provided with a through hole 214 for connecting the oil return hole 212 and the annular groove 213. The transition connecting plate 209 is provided with a circulation hole. During operation, the liquid oil in the oil return hole 212 sucked by negative pressure beats on the transition connecting plate 209 to form mist oil, and part of the liquid oil passes through the circulation hole of the transition connecting plate 209 and beats on the front connecting plate 208 to form mist oil, thereby fully lubricating the components in the central area such as the front connecting plate 208, the transition connecting plate 209, and the rear connecting plate 210.

[0049] The above technical solution solves a core technical problem. When the front connecting plate 208, the transition connecting plate 209 and the rear connecting plate 210 in the crankshaft rotate, the mist oil in this area will perform centrifugal motion under the rotation of the front connecting plate 208, the transition connecting plate 209, the rear connecting plate 210 and other components, thereby causing the front connecting plate 208, the transition connecting plate 209, the rear connecting plate 210 and other central area components to have poor lubrication effect. The introduction of the above technology just solves this thorny problem, so that the front connecting plate 208, the transition connecting plate 209, the rear connecting plate 210, the connection between the crankshaft 2 and the first connecting rod 203, the connection between the crankshaft 2 and the second connecting rod 204, etc. are fully lubricated.

[0050] In order to effectively recycle and utilize the high-temperature mist oil in the cylinder body 1, the first cylinder body 101 is provided with an oil-gas separation mechanism 5 for separating the high-temperature mist oil in the cylinder body 1 from oil and gas. The oil-gas separation mechanism 5 is provided with an oil drain hole, and the oil drain hole of the oil-gas separation mechanism 5 is connected to the oil inlet of the oil return channel 126 through a connecting pipe.

[0051] Specifically, Figure 7 and Fig. 9 As shown, the oil-gas separation mechanism 5 includes a separation cylinder cover 501, which is connected to the first cylinder body 101 and is provided with an installation cavity 502, which is communicated with the inner cavity of the first cylinder body 101; a separation box 503 is provided on the separation cylinder cover 501, and a first separation chamber 504, an oil storage chamber 505 and a second separation chamber 506 are provided in the separation box 503, a first notch 507 communicating with the first separation chamber 504 and the oil storage chamber 505 is provided in the separation box 503, and a second notch 508 communicating with the oil storage chamber 505 and the second separation chamber 506 is provided in the separation box 503; a cover plate 509 is provided on the separation box 503, and an exhaust hole 510 is provided on the cover plate 509, and the exhaust hole 510 corresponds to the second separation chamber 506, and the exhaust hole 510 is arranged at one end of the second separation chamber 506 far from the oil storage chamber; a separation hole communicating with the installation cavity 502 is provided at the bottom of the first separation chamber 504. In this embodiment, the exhaust hole 510 of the cover plate 509 is provided with an exhaust pipe extending outward. At the same time, the first separation chamber 504, the oil storage chamber 505 and the second separation chamber 506 are connected in sequence to form a U-shape, which can greatly reduce the volume and weight of the oil-gas separation mechanism 5. In addition, an oil drain hole 520 is provided at the bottom of the oil storage chamber 505, and the oil drain hole 520 of the oil storage chamber 505 is connected to the oil inlet of the oil return channel 126 through a connecting pipe, and the oil recovered by the oil storage chamber 505 flows into the annular groove 213 through the connecting pipe and the oil return channel 126.

[0052] In order to ensure that the liquid oil recovered in the first separation chamber 504 and the second separation chamber 506 can flow into the oil storage chamber 505, the bottom surface level of the first separation chamber 504 and the second separation chamber 506 are higher than the bottom surface level of the oil storage chamber 505. In addition, the bottom surface of the first separation chamber 504 is inclined downward toward the oil storage chamber 505. The bottom surface of the second separation chamber 506 is inclined downward toward the oil storage chamber 505; the bottom surface of the oil storage chamber 505 is inclined toward the oil drain hole to avoid the phenomenon of oil accumulation at the bottom of the oil storage chamber 505.

[0053] In addition, the oil-gas separation mechanism 5 further includes an opening and closing spring 512, one end of which is connected to the bottom surface of the first separation chamber 504, and the other end of which is movably covered on the separation hole of the first separation chamber 504. When the inner cavity of the cylinder body 1 is under negative pressure, the other end of the opening and closing spring 512 is tightly covered on the separation hole of the first separation chamber 504; when the inner cavity of the cylinder body 1 is under positive pressure, the high-temperature mist oil flow in the inner cavity of the cylinder body 1 passes through the separation hole of the first separation chamber 504 to push open the opening and closing spring 512, and then the high-temperature mist oil flow passes through the first separation chamber 504, the oil storage chamber 505 and the second separation chamber 506 in sequence for oil-gas separation and is discharged through the exhaust pipe of the cover plate 509. After the high-temperature mist oil airflow passes through the separation hole, condensation occurs in the first separation chamber 504, the oil storage chamber 505 and the second separation chamber 506 to form liquid oil; and the design of the first separation chamber 504, the oil storage chamber 505, the first notch 507, the second notch 508 and the second separation chamber 506 extends the path of the high-temperature mist oil airflow from the separation hole to the exhaust pipe of the cover plate 509. At the same time, the space between the first separation chamber 504, the oil storage chamber 505 and the second separation chamber 506 can also accommodate part of the high-temperature mist oil airflow, thereby improving the condensation efficiency of the high-temperature mist oil airflow, thereby improving the oil recovery rate.

[0054] In order to further extend the path of the high-temperature mist oil flow from the separation hole to the exhaust pipe of the cover plate 509, a first baffle 513 is provided at the second notch, and a second baffle 514 is provided on the inner wall of the second separation chamber 506. The first baffle 513 and the second baffle 514 are arranged oppositely and staggered. Moreover, the second baffle 514 is located between the first baffle 513 and the exhaust hole 510.

[0055] Furthermore, the bottom of the oil storage chamber 505 is provided with a first rib plate 518 and a second rib plate 519, the side wall of the first rib plate 518 is connected to the side wall of the oil storage chamber 505 near the first notch 507, the second rib plate 519 is connected to the inner wall of the oil storage chamber 505, the first rib plate 518 and the second rib plate 519 are opposite and staggered, the first rib plate 518 and the second rib plate 519 are both located between the first notch 507 and the first baffle plate 513, and the first baffle plate 513 is arranged on the side of the second notch 508 near the first notch 507. Through the position arrangement of the first rib plate 518, the second rib plate 519 and the first baffle plate 513, the path of the high-temperature mist oil airflow from the separation hole to the exhaust pipe of the cover plate 509 is further extended, and the condensation efficiency of the high-temperature mist oil airflow is improved.

[0056] The two-cylinder horizontally opposed engine also includes a first throttle assembly 3 and a second throttle assembly 4; the first throttle assembly 3 and the second throttle assembly 4 are respectively mounted on the first cylinder body 101 and the second cylinder body 102, the first rotating rod 116 is connected to the first throttle assembly 3, and the second rotating rod 120 is connected to the second throttle assembly 4. In this embodiment, a mounting plate 516 connected to the first throttle assembly 3 is provided in the mounting cavity 502 of the separation cylinder head 501, and the mounting plate 516 divides the mounting cavity into a first chamber and a second chamber, and an air flow hole 517 is provided on the mounting plate 516, and the first separation chamber 504 is connected to the second chamber through the separation hole. The first chamber and the second chamber are connected through the air flow hole 517, and the first chamber is connected to the first channel 104, and the high-temperature mist oil airflow of the first chamber enters the second chamber through the air flow hole 517 of the mounting plate 516. The inner wall of the first chamber is provided with a mounting hole, one end of the first rotating rod 116 is rotatably connected to the mounting hole of the first chamber, the other end of the first rotating rod 116 is connected to a cam, the cam cooperates with the first throttle assembly 3, the first throttle assembly 3 is arranged in the mounting chamber 502, and the rotation of the cam drives the first throttle assembly 3 to work; the matching relationship between the second throttle assembly 4 and the second rotating rod 120 is the same as the matching relationship between the first throttle assembly 3 and the first rotating rod 116. The rotating rod drives the cam to rotate and thus drives the throttle assembly to work, which is a prior art and will not be repeated here.

[0057] In order to detect the amount of oil in the cylinder body 1 as needed, an oil hole 127 is provided on the first cylinder body 101. The oil hole 127 of the first cylinder body 101 is provided with a connecting ring 128 extending outward. The connecting ring 128 is internally threaded with an oil plug 129. The oil plug 129 is provided with an oil dipstick 130, which is arranged between the first connecting rod 203 and the first bearing 110. In order to ensure that the oil dipstick 130 does not interfere with the rotation of the crankshaft 2, the oil dipstick 130 is arranged between the front connecting plate 208 and the first bearing 110 through careful study of the structure of the cylinder body 1 and the crankshaft 2. The entire twin-cylinder opposed engine has only such a position for convenient installation of the oil dipstick 130.

[0058] It should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A two-cylinder horizontally opposed engine, characterized in that: Including cylinder block and crankshaft; The cylinder body comprises a first cylinder body and a second cylinder body, the first cylinder body and the second cylinder body are horizontally connected; the first cylinder body is provided with a first shell, and the first shell is provided with a first channel that runs horizontally; the second cylinder body is provided with a second shell, and the second shell is provided with a second channel that runs horizontally; Both ends of the crankshaft are rotatably connected to the connection between the first cylinder body and the second cylinder body, and the crankshaft is provided with a first transmission gear and a second transmission gear, which are located on both sides of the rotation connection between one end of the crankshaft and the cylinder body, and the first transmission gear corresponds to the first channel, and the second transmission gear corresponds to the second channel; The outer sides of the first cylinder body and the second cylinder body are both provided with a plurality of annular heat sinks arranged in parallel and of different sizes, at least one annular heat sink of the first cylinder body is connected to the first shell, and at least one annular heat sink of the second cylinder body is connected to the second shell; A through heat dissipation channel is provided between the first cylinder body and the first housing, and at least one annular heat dissipation fin of the first cylinder body passes through the heat dissipation channel and is connected to the first housing; a through heat dissipation channel is also provided between the second cylinder body and the second housing, and at least one annular heat dissipation fin of the second cylinder body passes through the heat dissipation channel and is connected to the second housing; A first sprocket is rotatably connected to the end of the first channel away from the crankshaft, and the first transmission gear and the first sprocket are connected by a first belt transmission; a second sprocket is rotatably connected to the end of the second channel away from the crankshaft, and the second transmission gear and the second sprocket are connected by a second belt transmission; The first sprocket is provided with a plurality of first punched holes evenly distributed in the circumferential direction, and the first channel is communicated with the mounting cavity on the first throttle assembly side through the first punched holes of the first sprocket; the second sprocket is provided with a plurality of second punched holes evenly distributed in the circumferential direction, and the second channel is communicated with the mounting cavity on the second throttle assembly side through the second punched holes of the second sprocket; A first connecting hole and a second connecting hole for connecting the crankshaft are provided at the connection between the first cylinder body and the second cylinder body; one end of the crankshaft is rotatably connected to the inner wall of the first connecting hole through a first bearing, and the other end of the crankshaft is rotatably connected to the inner wall of the second connecting hole through a second bearing; the first transmission gear and the second transmission gear are located on both sides of the first bearing; a correcting bearing is provided at one end of the crankshaft, and one end of the crankshaft is rotatably connected to the inner wall of the first connecting hole through the correcting bearing, and the first bearing and the correcting bearing are located on both sides of the first transmission gear.

2. The two-cylinder horizontally opposed engine according to claim 1, characterized in that: The crankshaft is rotatably connected with a first connecting rod and a second connecting rod, the first connecting rod is provided with a first throw-off scale, and the second connecting rod is provided with a second throw-off scale; the first cylinder body is provided with a first half oil storage chamber on the side close to the second cylinder body, and the second cylinder body is provided with a second half oil storage chamber on the side close to the first cylinder body; the first cylinder body and the second cylinder body are connected oppositely so that the first half oil storage chamber and the second half oil storage chamber form an oil storage chamber; the first throw-off scale and the second throw-off scale are both located above the oil storage chamber.

3. The two-cylinder horizontally opposed engine according to claim 2, characterized in that: It also includes a first belt and a second belt; the first channel of the first shell is rotatably connected to the end away from the crankshaft with a first rotating rod, the first rotating rod is sleeved with a first sprocket, the first transmission gear and the first sprocket are connected through a first belt transmission, and the first belt is located in the first channel; the second channel of the second shell is rotatably connected to the end away from the crankshaft with a second rotating rod, the second rotating rod is sleeved with a second sprocket, the second transmission gear and the second sprocket are connected through a second belt transmission, and the second belt is located in the second channel.

4. The two-cylinder horizontally opposed engine according to claim 3, characterized in that: The first cylinder body is provided with an oil hole, the oil hole of the first cylinder body is provided with a connecting ring extending outward, the connecting ring is internally threadedly connected with an oil plug, the oil plug is provided with an oil dipstick, and the oil dipstick is arranged between the first connecting rod and the first bearing.

5. The two-cylinder horizontally opposed engine according to any one of claims 1 to 4, characterized in that: The crankshaft is provided with an oil return hole in the axial direction, and the oil return hole is communicated with the inner cavity of the first cylinder body; an annular groove coaxial with the crankshaft is provided at a rotation connection between the cylinder body and the crankshaft, and a through hole for connecting the oil return hole and the annular groove is provided on the crankshaft; an oil return channel is provided on the first cylinder body corresponding to the annular groove, and the oil outlet of the oil return channel is communicated with the annular groove.

6. The two-cylinder horizontally opposed engine according to claim 5, characterized in that: The first cylinder body is provided with an oil-gas separation mechanism for separating the high-temperature mist oil in the cylinder body from oil and gas. The oil-gas separation mechanism is provided with an oil drain hole, and the oil drain hole of the oil-gas separation mechanism is connected to the oil inlet of the oil return channel through a connecting pipe.

7. The two-cylinder horizontally opposed engine according to claim 6, characterized in that: The oil-gas separation mechanism includes a separation cylinder head, which is connected to the first cylinder body and is provided with an installation cavity, which is communicated with the inner cavity of the first cylinder body; a separation box is provided on the separation cylinder head, which is provided with a first separation chamber, an oil storage chamber and a second separation chamber, a first notch communicating with the first separation chamber and the oil storage chamber, and a second notch communicating with the oil storage chamber and the second separation chamber; a cover plate is provided on the separation box, which is provided with an exhaust hole, which corresponds to the second separation chamber, and is arranged at an end of the second separation chamber away from the oil storage chamber; a separation hole communicating with the installation cavity is provided at the bottom of the first separation chamber; an oil drain hole is provided at the bottom of the oil storage chamber, and the oil drain hole of the oil storage chamber is connected to the oil inlet of the return oil channel through a connecting pipe.

8. The two-cylinder horizontally opposed engine according to claim 7, characterized in that: The oil-gas separation mechanism also includes an opening and closing spring plate, one end of which is connected to the bottom surface of the first separation chamber, and the other end of the opening and closing spring plate is movably covered on the separation hole of the first separation chamber; a mounting plate connected to the first throttle assembly is provided in the mounting cavity of the separation cylinder cover, and the mounting plate divides the mounting cavity into a first chamber and a second chamber, and the first separation chamber is connected to the second chamber through the separation hole; an air flow hole is provided on the mounting plate, and the first chamber is connected to the second chamber through the air flow hole.

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