Gas distribution system and engine

Abstract

The utility model provides an air distribution system and an engine, the air distribution system is located between a crankcase and a cylinder body and is in transmission connection with a crankshaft, the air distribution system comprises a mounting seat arranged on the cylinder body, the mounting seat is provided with two rocker arms in a mirror image mode, and the two rocker arms are both connected with air valves; the mounting shaft is arranged on the cylinder body, two transmission plates are rotationally arranged on the mounting shaft, a cam shaft is arranged on the crankcase, the end parts of the two transmission plates are in sliding fit with a cam of the cam shaft, tappets are rotationally arranged at the other ends of the transmission plates, and the tappets are rotationally connected with the rocker arms; the transmission part is arranged between the cam shaft and the crankshaft, and when the crankshaft rotates, the transmission part drives the cam shaft to rotate synchronously. The installation shaft and the cam shaft are arranged in the assembling direction of the crankcase and the cylinder body, so that the crankshaft, the cam shaft and the installation shaft are longitudinally arranged, the problem that the width of the crankcase is increased due to traditional transverse arrangement is solved, the size of the whole engine is reduced, and installation on a vehicle is more flexible after the engine is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a valve train and an engine. Background Art

[0002] The valve train of an engine is an important part inside the engine, directly affecting performance indicators such as combustion efficiency, power output, and fuel consumption. According to the requirements of the working cycle and ignition sequence carried out in each cylinder of the engine, the intake and exhaust valves of each cylinder are opened and closed regularly, so that fresh combustible mixture or air can enter the cylinder in time, and exhaust gas can be discharged from the cylinder in time. During the compression and power stroke, the valves are closed to ensure the sealing of the combustion chamber.

[0003] In the valve train of the prior art, its output shaft is horizontally arranged with the crankshaft in the crankcase and is connected by multiple gears. When the crankshaft rotates, it can drive the transmission shaft to rotate under the meshing of multiple gears, so that the cam on the transmission shaft drives the valve to move, realizing intake or exhaust. However, since the output shaft of the valve train is horizontally arranged in the crankcase, the width of the crankcase is increased, thereby increasing the overall size of the engine, and the assembly of the engine is also restricted. Summary of the Utility Model

[0004] Aiming at the deficiencies in the prior art, the utility model provides a valve train and an engine, which solve the problem that the overall size of the engine in the prior art is large and the assembly is restricted due to the horizontal arrangement of the transmission shaft of the valve train and the crankshaft.

[0005] According to the embodiments of the utility model, the following technical solutions are adopted:

[0006] A valve train is located between the crankcase and the cylinder block and is drivingly connected with the crankshaft, and includes:

[0007] A mounting seat provided on the cylinder block, two rocker arms are mirror-symmetrically provided on the mounting seat, and two rocker arms are both connected with valves;

[0008] A mounting shaft provided on the cylinder block, two transmission plates are rotatably provided on the mounting shaft, a camshaft is provided in the crankcase, the ends of the two transmission plates are both slidably attached to the cams of the camshaft, a tappet is rotatably provided at the other end of the transmission plate, and the tappet is rotatably connected with the rocker arm; and

[0009] A transmission member provided between the camshaft and the crankshaft, when the crankshaft rotates, the transmission member drives the camshaft to rotate synchronously.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] In this solution, when controlling intake or exhaust through the movement of the valve, with the cooperation of transmission components, when the crankshaft rotates, the camshaft is driven to rotate through the transmission components, so that the cams on the camshaft rotate around the camshaft as the circumference, and then the two transmission plates rotatably arranged on the mounting shaft are made to perform an intermittent swinging motion through the cams. When the transmission plates swing, the tappet can be driven to move, thus realizing the control of the valve and achieving intake or exhaust; by arranging the mounting shaft and the camshaft along the assembly direction of the crankcase and the cylinder block, the crankshaft, the camshaft and the mounting shaft are longitudinally arranged, avoiding the problem of the increased width of the crankcase caused by the traditional transverse arrangement, which helps to reduce the volume of the entire engine, and the installation of the engine on the vehicle is more flexible after the reduction.

[0012] Preferably, the transmission plate includes a sleeve rotatably arranged on the mounting shaft, a jacking portion extending along the first direction of the sleeve, and a transmission portion extending along the second direction of the sleeve. The jacking portion is connected to the tappet, and the transmission portion is in sliding fit with the cam on the camshaft, and the first direction is perpendicular to the second direction.

[0013] Preferably, spherical grooves are fixedly provided at the ends of both the jacking portion and the rocker arm, and spherical members are provided at both ends of the tappet, and the spherical members are snapped into the corresponding spherical grooves.

[0014] Preferably, a sliding plate is provided at the end of the transmission portion, and the sliding plate fits on the cam surface of the camshaft.

[0015] Preferably, the transmission component includes a transmission gear provided on the camshaft and a driving gear provided on the crankshaft, and the driving gear meshes with the transmission gear.

[0016] Preferably, sealing members are provided at the ends of both the mounting shaft and the camshaft.

[0017] Preferably, a mounting hole is provided at the other end of the mounting shaft.

[0018] Preferably, fixing screws are provided in the cylinder block, and the fixing screws are in threaded connection with the mounting shaft.

[0019] According to the embodiments of the present invention, the following technical solutions are also adopted in the present invention:

[0020] An engine includes a valve train system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the engine according to the embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the crankcase and the cylinder block according to the embodiment of the present invention.

[0023] Figure 3 It is a schematic diagram of the cooperation structure of the cam and the transmission plate according to the embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the connection structure between the drive plate and the tappet in the embodiment of the present utility model.

[0025] In the above-mentioned drawings: 1. Crankcase; 101. Fixed screw; 2. Crankshaft; 201. Driving gear; 3. Mounting shaft; 301. Seal; 302. Mounting hole; 4. Driving gear; 5. Tappet; 6. Drive plate; 601. Slide plate; 602. Spherical groove; 603. Spherical part; 604. Sleeve; 605. Lifting part; 606. Transmission part; 7. Camshaft; 8. Mounting seat; 801. Rocker arm; 9. Valve; 10. Cylinder block. Detailed implementation manners

[0026] The technical solutions in the present utility model will be further described below with reference to the drawings and embodiments.

[0027] As Figures 1 to 3 shown, the embodiment of the present utility model provides a valve train system, which is located between the crankcase 1 and the cylinder block 10 and is in transmission connection with the crankshaft 2, and includes:

[0028] A mounting seat 8 provided on the cylinder block 10, two rocker arms 801 are mirror - provided on the mounting seat 8, and two rocker arms 801 are both connected with a valve 9;

[0029] A mounting shaft 3 provided on the cylinder block 10, two drive plates 6 are rotatably provided on the mounting shaft 3, a camshaft 7 is provided in the crankcase 1, the ends of the two drive plates 6 are both in sliding fit with the cams of the camshaft 7, the other end of the drive plate 6 is rotatably provided with a tappet 5, and the tappet 5 is rotatably connected with the rocker arm 801; and

[0030] A transmission member provided between the camshaft 7 and the crankshaft 2, when the crankshaft 2 rotates, the transmission member drives the camshaft 7 to rotate synchronously.

[0031] In the embodiment of the present utility model, since there is a certain amount of free space on the side of the crankcase 1 close to the clutch, the camshaft 7 is installed in the crankcase 1 and is directly above the crankshaft 2, and the mounting shaft 3 is installed in the cylinder block 10 and is directly above the camshaft 7. Due to the longitudinal arrangement of the crankcase 1 and the cylinder block 10, the mounting shaft 3 and the camshaft 7 are arranged along the assembly direction of the crankcase 1 and the cylinder block 10, so that the crankshaft 2, the camshaft 7 and the mounting shaft 3 are longitudinally arranged, avoiding the problem of the increased width of the crankcase 1 caused by the traditional horizontal arrangement, thereby helping to reduce the volume of the entire engine, and after the engine is reduced, its installation on the vehicle is more flexible.

[0032] When controlling the valve 9 to achieve intake or exhaust, when the crankshaft 2 rotates, through the cooperation of the transmission member, the transmission member drives the camshaft 7 to rotate, so that the cams on the camshaft 7 rotate in a circle with the camshaft 7 as the center, so as toFigure 3 For example, when the cam on the camshaft 7 rotates clockwise, the protrusion of the cam first presses upward on the left transmission plate 6, causing the transmission plate 6 to rotate clockwise and the end to lift upward, so that the tappet 5 presses one end of the rocker arm 801, causing the rocker arm 801 to drive the valve 9 downward. When the cam continues to rotate to the right transmission plate 6, the cam drives this transmission plate 6 to rotate counterclockwise, so that the connected tappet 5 presses one end of the rocker arm 801, causing the rocker arm 801 to drive the valve 9 downward. During the continuous rotation of the camshaft 7, the movement of the two valves 9 is realized, so as to realize intake and exhaust. Using one cam can realize the operation of two rocker arms 801, reduce the number of components, and thus reduce the manufacturing cost.

[0033] Specifically, as Figure 4 shown, the transmission plate 6 includes a sleeve 604 rotatably arranged on the mounting shaft 3, a jacking part 605 extending along the first direction of the sleeve 604, and a transmission part 606 extending along the second direction of the sleeve 604. The jacking part 605 is connected to the tappet 5, and the transmission part 606 is in sliding fit with the cam of the camshaft 7, and the first direction is perpendicular to the second direction; the setting of the sleeve 604 can make the transmission plate 6 more conveniently installed on the mounting shaft 3, and the jacking part 605 and the transmission part 606 are arranged at a right angle, which can ensure that the movement of the camshaft 7 is effectively converted into the rotational movement of the transmission plate 6, and then transmitted to the rocker arm 801 through the tappet 5, finally realizing the opening and closing of the valve 9, and improving the stress intensity of the transmission plate 6 to ensure its certain service life.

[0034] Specifically, as Figure 4 shown, spherical grooves 602 are fixedly provided at the ends of the jacking part 605 and the rocker arm 801, and spherical parts 603 are provided at both ends of the tappet 5. The spherical parts 603 are clamped into the corresponding spherical grooves 602; compared with hinge connection, the spherical connection structure formed by the spherical grooves 602 and the spherical parts 603 is more stable, making the spherical grooves 602 and the spherical parts 603 form a joint structure, allowing a certain angle adjustment range between the jacking part 605 and the rocker arm 801. When the engine runs and causes small displacements due to factors such as vibration and thermal expansion, the formed joint structure can be well adapted, so as to ensure the normal operation of the valve 9.

[0035] Specifically, as Figure 3 shown, a sliding plate 601 is provided at the end of the transmission part 606, and the sliding plate 601 is attached to the cam surface of the camshaft 7; under the action of the sliding plate 601, it is ensured that there is a smooth contact surface between the transmission part 606 and the cam of the camshaft 7, thereby reducing friction and wear and improving the reliability and durability of the system.

[0036] Based on the above scheme, as Figure 2As shown, the transmission member includes a transmission gear 4 provided on the camshaft 7 and a driving gear 201 provided on the crankshaft 2, and the driving gear 201 is meshed with the transmission gear 4; the crankshaft 2 and the camshaft 7 are directly connected by the cooperation of the driving gear 201 and the transmission gear 4, thereby reducing the number of transmission parts, making the weight of the entire engine lighter, indirectly improving the fuel efficiency, simplifying the transmission steps, reducing energy loss, and increasing the transmission efficiency, thereby improving the overall performance of the engine.

[0037] Specifically, Figure 2 As shown, the ends of the mounting shaft 3 and the camshaft 7 are both provided with seals 301; the seals 301 can effectively prevent the oil from leaking from the mounting shaft 3 and the camshaft 7, thereby ensuring the normal operation of the lubrication system inside the engine.

[0038] like Figure 3 As shown, a mounting hole 302 is provided at the other end of the mounting shaft 3; during assembly, after the transmission plate 6 is mounted on the mounting shaft 3, the fasteners can be installed in the mounting hole 302 to limit the transmission plate 6 to ensure stable operation.

[0039] like Figure 2 As shown, a fixing screw 101 is provided in the cylinder body 10, and the fixing screw 101 is threadedly connected to the mounting shaft 3; the fixing screw 101 can be fixedly connected to the mounting shaft 3, thereby ensuring the stability of the installation of the transmission plate 6, and indirectly ensuring the stability of the entire valve distribution system.

[0040] The utility model embodiment also proposes an engine, including the above-mentioned valve system. The specific structure of the valve system refers to the above-mentioned embodiment. Since the engine adopts all the technical solutions of the above-mentioned embodiment, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiment, which will not be repeated here one by one.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An air distribution system is located between the crankcase (1) and the cylinder block (10) and is drivingly connected to the crankshaft (2), and is characterized in that, Comprising: A mounting base (8) provided on the cylinder block (10), two rocker arms (801) are mirror - provided on the mounting base (8), and two valves (9) are connected to the two rocker arms (801) respectively; A mounting shaft (3) provided on the cylinder block (10), two transmission plates (6) are rotatably provided on the mounting shaft (3), a camshaft (7) is provided in the crankcase (1), the ends of the two transmission plates (6) are in sliding fit with the cams of the camshaft (7), a tappet (5) is rotatably provided at the other end of the transmission plate (6), and the tappet (5) is rotatably connected to the rocker arm (801); And A transmission member provided between the camshaft (7) and the crankshaft (2), when the crankshaft (2) rotates, the transmission member drives the camshaft (7) to rotate synchronously.

2. The gas distribution system according to claim 1, characterized in that, The transmission plate (6) includes a sleeve (604) rotatably provided on the mounting shaft (3), a jacking part (605) extending along a first direction of the sleeve (604), and a transmission part (606) extending along a second direction of the sleeve (604), the jacking part (605) is connected to the tappet (5), the transmission part (606) is in sliding fit with the cam of the camshaft (7), and the first direction is perpendicular to the second direction.

3. The intake and exhaust system according to claim 2, wherein, Spherical grooves (602) are fixedly provided at the ends of the jacking part (605) and the rocker arm (801) respectively, spherical members (603) are provided at both ends of the tappet (5), and the spherical members (603) are clamped into the corresponding spherical grooves (602).

4. The intake and exhaust system according to claim 2, wherein, A sliding plate (601) is provided at the end of the transmission part (606), and the sliding plate (601) is attached to the cam surface of the camshaft (7).

5. The intake and exhaust system according to claim 1, wherein The transmission member includes a transmission gear (4) provided on the camshaft (7) and a driving gear (201) provided on the crankshaft (2), and the driving gear (201) is meshed with the transmission gear (4).

6. The intake and exhaust system according to claim 1, wherein, Sealing members (301) are provided at the ends of the mounting shaft (3) and the camshaft (7).

7. The intake and exhaust system according to claim 6, wherein An installation hole (302) is opened at the other end of the mounting shaft (3).

8. A gas distribution system according to claim 1, characterized in that, A fixing screw (101) is provided in the cylinder block (10), and the fixing screw (101) is thread - connected to the mounting shaft (3).

9. An engine, characterized in that, Including a valve distribution system according to any one of claims 1 - 8.

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