Engine

Abstract

The embodiment of the utility model provides an engine. The engine comprises a cylinder head, an intake valve, an exhaust valve, a valve spring lower seat, a valve inner spring, a valve outer spring, a valve spring upper seat, a valve lock clamp, a valve clearance adjusting gasket, a valve tappet, a finger-type small rocker arm, a finger-type rocker arm shaft, an intake cam shaft, an exhaust cam shaft, a box body, a crankshaft and a timing chain. An inlet valve seat ring, an exhaust valve seat ring and a valve guide pipe are arranged in the cylinder head; the intake valve is arranged in the intake valve seat ring; the exhaust valve is arranged in the exhaust valve seat ring; a valve spring lower seat is arranged in the cylinder head; the valve inner spring is arranged on the upper side of the valve spring lower seat; the valve outer spring is arranged on the upper side of the valve spring lower seat; the valve spring upper seat is arranged on the upper sides of the valve inner spring and the valve outer spring; the valve lock clamp is arranged on the upper sides of the valve spring upper seat and the valve and is locked at an intake valve and an exhaust valve, so that the valve is subjected to the force of the valve spring; the valve clearance adjusting gasket is arranged on the upper side of the valve spring upper seat; the valve tappet is arranged on the upper side of the intake valve; the finger-type small rocker arm is arranged on the upper side of the exhaust valve; the finger-type rocker arm shaft is arranged on the inner side of the small rocker arm and the inner side of the air cylinder head in a finger-type mode, so that the finger-type small rocker arm is connected with the air cylinder head. The air inlet cam shaft is arranged on the upper side of an air inlet cam shaft hole of the cylinder head; the exhaust cam shaft is arranged on the upper side of the cylinder head exhaust cam shaft hole; the intake valve and the exhaust valve both adopt double-valve spring mechanisms, so that the safety and the reliability of valve springs are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle engines. Background Art

[0002] At present, with the increasing development of motorcycles, motorcycles have developed into a kind of use involving entertainment and multi-functions in addition to commuting. Such vehicles have complex operating conditions. The complex driving conditions will cause the crankshaft speed to change sharply from high to low, which will cause additional inertia force of the valve mechanism. At this time, the valve spring needs to bear the inertia force of the normal operation of the valve mechanism and the additional sharply changing inertia force of the valve mechanism. In order to improve the safety of the valve mechanism, the valve needs to adopt a double spring mechanism, with a small spring inside and a large spring outside. Even if one spring breaks, the other can ensure the return of the valve, so as not to damage more engine parts or even cause the engine to jam. However, due to the small cylinder diameter of some engines, the combustion space should be used as much as possible for the intake valve to increase the diameter of the intake valve so as to increase the intake volume and increase the power. Therefore, the intake valve must be as close to the center of the combustion chamber as possible, so that the exhaust valve has to be farther away from the center of the combustion chamber, so the center distance between the two exhaust valves is smaller. If a sliding tappet mechanism is used, the double valve spring structure cannot be arranged due to insufficient space. Utility Model Content

[0003] In order to solve the problem of insufficient space, the exhaust valve adopts a small rocker arm mechanism. Since the small rocker arm does not require a sliding tappet, it can save space for the arrangement of the inner and outer double valve springs. On the other hand, the small rocker arm reduces the contact surface of the exhaust high-temperature cam, reduces the risk of wear, and extends the life of the cam.

[0004] In order to solve the above technical problems, the embodiments of the present invention adopt the following technical solutions:

[0005] An embodiment of the utility model provides an engine, the engine comprising:

[0006] Cylinder head;

[0007] An intake valve seat ring, wherein the intake valve seat ring is installed in the cylinder head;

[0008] An exhaust valve seat ring, wherein the exhaust valve seat ring is installed in the cylinder head;

[0009] A valve guide, wherein the valve guide is installed in the cylinder head;

[0010] An intake valve, wherein the intake valve is mounted in an intake valve seat ring, and the intake valve is mounted in a valve guide;

[0011] An exhaust valve, wherein the exhaust valve is mounted in an exhaust valve seat ring, and the exhaust valve is mounted in a valve guide;

[0012] A valve spring lower seat, the valve spring lower seat being mounted on an upper side of a valve spring lower seat mounting surface of a cylinder head;

[0013] A valve inner spring, the valve inner spring being mounted on the upper side of the valve spring lower seat;

[0014] A valve outer spring, the valve outer spring is installed on the upper side of the valve spring lower seat;

[0015] A valve spring upper seat, the valve spring upper seat being mounted on the upper side of the inner and outer springs of the valve;

[0016] A valve lock clip, the valve lock clip is installed on the valve spring upper seat and the upper side of the valve;

[0017] A valve clearance adjustment gasket, the valve clearance adjustment gasket is installed on the upper side of the intake and exhaust valves;

[0018] A valve tappet, wherein the valve tappet is mounted on the upper side of the intake valve;

[0019] A finger-type small rocker arm, wherein the finger-type small rocker arm is arranged on the upper side of the exhaust valve;

[0020] A finger-type rocker arm shaft, wherein the finger-type rocker arm shaft is installed inside the finger-type small rocker arm and the cylinder head, so that the finger-type small rocker arm and the cylinder head are connected;

[0021] An intake camshaft, the intake camshaft being arranged on the upper side of the intake camshaft hole of the cylinder head;

[0022] An exhaust camshaft is arranged on the upper side of the exhaust camshaft hole of the cylinder head.

[0023] The engine further comprises a camshaft seat cover, wherein the camshaft seat cover is arranged on the cylinder head and is provided with a camshaft hole.

[0024] The camshaft seat cover also includes: a fastening bolt, which is fixed to the cylinder head to tighten the intake and exhaust camshafts and the camshaft seat cover.

[0025] The intake valve and the intake valve seat ring have an axial direction that coincides; the valve tappet is arranged inside the intake valve hole of the cylinder head; the axial direction of the valve tappet coincides with the axial direction of the intake valve.

[0026] The exhaust valve and the exhaust valve seat ring are aligned in axial direction;

[0027] The finger-type small rocker arm is arranged on the exhaust valve side of the cylinder head;

[0028] The finger-type rocker arm shaft, the finger-type small rocker arm and the cylinder head rocker arm hole are aligned in axial direction.

[0029] The intake camshaft is arranged on the upper side of the intake valve; the axis of the intake camshaft is perpendicular to the axis of the intake valve;

[0030] The exhaust camshaft is arranged on the upper side of the exhaust valve; the axis of the intake camshaft is perpendicular to the axis of the intake valve.

[0031] A valve tappet, an intake valve, a valve inner spring, and a valve outer spring are arranged below the intake camshaft. During the rotation of the intake camshaft, the valve tappet is driven to compress the intake valve and move downward, and the valve inner spring and the valve outer spring reset the intake valve.

[0032] A finger-type rocker arm, an exhaust valve, an inner spring and an outer spring are arranged below the exhaust camshaft. During the rotation of the exhaust camshaft, the finger-type rocker arm is driven to compress the exhaust valve and move downward, and the valve inner spring and the valve outer spring reset the exhaust valve.

[0033] In some embodiments of the present application, the engine further comprises:

[0034] A box body, the box body is arranged at the lower side of the cylinder head;

[0035] A crankshaft, the crankshaft being arranged inside the housing and provided with a coaxial primary drive gear;

[0036] Timing chain, the timing chain is used to transmit the power of the crankshaft to the intake camshaft and the exhaust camshaft. In the embodiment of the present application, in the engine, the crankshaft is the power source of the engine camshaft. The crankshaft is engaged with the timing chain, the timing chain is engaged with the intake camshaft, and the timing chain is engaged with the exhaust camshaft, so as to drive the intake camshaft and the exhaust camshaft; the crankshaft speed is twice the speed of the intake camshaft and the exhaust camshaft;

[0037] In an embodiment of the present application, the intake camshaft is provided with a cam, and when the intake camshaft rotates, the valve tappet is driven to move along the axial direction, thereby driving the valve clearance adjustment gasket to move along the axial direction of the intake valve; the valve clearance adjustment gasket pushes the intake valve to move along the axial direction; as the intake cam rotates, the intake valve is reset by the valve inner spring, the valve outer spring, the valve spring upper seat and the valve lock clamp. The intake valve performs reciprocating high-frequency motion during the rotation of the intake camshaft;

[0038] In an embodiment of the present application, the exhaust camshaft is provided with a cam. When the exhaust camshaft rotates, the finger-type small rocker arm is driven to rotate with the finger-type rocker arm shaft, thereby driving the valve clearance adjustment gasket to move along the axial direction of the exhaust valve; the valve clearance adjustment gasket pushes the exhaust valve to move along the axial direction; as the exhaust cam rotates, the exhaust valve is reset by the valve inner spring, the valve outer spring, the valve spring upper seat and the valve lock clamp. The exhaust valve performs reciprocating high-frequency motion during the rotation of the exhaust camshaft;

[0039] Engine as described above.

[0040] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0041] An embodiment of the utility model provides an engine, the engine comprises a cylinder head, an intake valve, an exhaust valve, inner and outer valve springs, an intake camshaft, an exhaust camshaft, and a finger-type small rocker arm, wherein the intake valve is mounted in the cylinder head of the engine, the exhaust valve is mounted in the cylinder head of the engine, the valve inner spring and the valve outer spring are mounted in the cylinder head of the engine, in order to make the intake valve large enough and to use the space for the intake valve as much as possible to increase the diameter of the intake valve so as to increase the intake volume and improve the power, the intake valve must be as close to the center of the combustion chamber as possible, so that the exhaust valve cannot be arranged with a double valve spring structure due to the small space, after using the finger-type small rocker arm on the exhaust side, space is saved, so that the double valve spring structure can continue to be used, thereby improving the safety of the valve mechanism, even if one spring is broken, the other one can ensure the return of the valve, so as not to damage the engine or even cause the engine to get stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the utility model application and the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments and the prior art description. Obviously, the drawings in the following description are only for the present embodiment. For ordinary technicians in this field, other drawings can also be obtained based on the drawings provided in this application without creative work.

[0043] Figure 1 It is a right side view of an engine provided by an embodiment of the utility model;

[0044] Figure 2 It is a top view of a cylinder head of an engine provided by an embodiment of the utility model;

[0045] Figure 3 It is a side view of a cylinder head of an engine provided by an embodiment of the utility model;

[0046] Figure 4It is a cross-sectional view of a cylinder head of an engine provided by an embodiment of the utility model;

[0047] Figure 5 It is a side sectional view of a cylinder head of an engine provided by an embodiment of the utility model;

[0048] Figure 6 It is a crankshaft diagram of an engine provided by the present novel embodiment;

[0049] Figure 7 It is a schematic diagram of a valve train of an engine provided by an embodiment of the utility model;

[0050] Figure 8 It is a cross-sectional view of an exhaust side of an engine provided by an embodiment of the utility model;

[0051] Fig. 9 It is a schematic diagram of an intake camshaft of an engine provided by an embodiment of the utility model;

[0052] Fig.10 It is a schematic diagram of an exhaust camshaft of an engine provided by an embodiment of the utility model;

[0053] Among them: 200, cylinder head; 201, valve guide; 202, intake valve seat ring; 203, exhaust valve seat ring; 204, intake camshaft hole; 205, exhaust camshaft hole; 206, rocker shaft hole; 207, valve lower spring seat mounting surface; 210, intake valve; 220, exhaust valve; 230, valve spring lower seat; 240, valve inner spring; 250, valve outer spring; 260, Valve spring upper seat; 270, valve lock clip; 280, valve clearance adjustment shim; 290, valve tappet; 300, intake camshaft; 310, exhaust camshaft; 320, finger-type small rocker arm; 330, finger-type rocker arm shaft; 400, housing; 410, crankshaft; 510, timing chain; 520, timing chain guide bar; 530, timing chain tensioner; 540, timing chain tensioner DETAILED DESCRIPTION

[0054] The following content will be combined with the drawings in the embodiments of the present application to provide a detailed and comprehensive description of the technical solutions in the embodiments of the present application. It should be noted that the described embodiment is only one embodiment of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present application.

[0055] In the description of the embodiments of the utility model application, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", "center", "horizontal", "vertical", etc. is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of simplifying the description of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, the meaning of multiple is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the description of the embodiments of the present utility model application, unless otherwise clearly specified or limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. The first feature may be directly connected to the second feature, or they may be indirectly connected through an intermediate medium. In the present application, unless otherwise clearly specified or limited, the first feature being "above" or "below" the second feature may mean that the first feature and the second feature are in direct contact, or they may be in indirect contact through an intermediate medium. Furthermore, the first feature being "on the upper side" of the second feature may mean that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is at a higher level than the second feature. The first feature being "on the lower side" of the second feature may mean that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is at a lower level than the second feature.

[0057] Unless otherwise defined in this embodiment, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art in the technical field of this application. The terms used in the description of this application are only for describing specific implementation methods and are not intended to limit this application.

[0058] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0059] like Figure 1-6 As shown, Figure 1 A right side view of an engine provided by an embodiment of the present invention;

[0060] This embodiment provides an engine, which includes:

[0061] A cylinder head 200, wherein an intake valve seat ring, an exhaust valve seat ring, and a valve guide are provided in the cylinder head 200, and the cylinder head 200 has an intake camshaft hole and an exhaust camshaft hole; the cylinder head 200 is provided with a valve lower spring seat mounting surface; the cylinder head 200 is provided with a rocker arm shaft hole;

[0062] Valve guide 201;

[0063] Intake valve seat 202;

[0064] Exhaust valve seat ring 203;

[0065] Intake camshaft hole 204;

[0066] Exhaust camshaft hole 205;

[0067] Rocker arm shaft hole 206;

[0068] Valve lower spring seat mounting surface 207;

[0069] An intake valve 210, wherein the intake valve 210 is disposed in an intake valve seat ring, and the intake valve 210 is disposed in a valve guide;

[0070] An exhaust valve 220, wherein the exhaust valve 220 is disposed in an exhaust valve seat ring, and the exhaust valve 220 is disposed in a valve guide;

[0071] A valve spring lower seat 230, the valve spring lower seat 230 is arranged on the upper side of the valve spring lower seat mounting surface of the cylinder head 200; a valve inner spring 240, the valve inner spring 240 is arranged on the upper side of the valve spring lower seat 230;

[0072] A valve outer spring 250, wherein the valve outer spring 250 is disposed on the upper side of the valve spring lower seat 230;

[0073] A valve spring upper seat 260, wherein the valve spring 260 is disposed on the upper side of the valve inner spring 240 and the valve outer spring 250;

[0074] A valve lock clamp 270, which is disposed on the valve spring upper seat 260 and the upper side of the valve, locks the intake valve 210 and the exhaust valve 220, so that the valve is subjected to the valve spring force;

[0075] A valve clearance adjustment gasket 280, wherein the valve clearance adjustment gasket 280 is disposed on the upper side of the valve inner spring 240 and the valve outer spring 250;

[0076] A valve tappet 290, wherein the valve tappet 290 is disposed on the upper side of the intake valve 210;

[0077] A finger-type small rocker arm 320, wherein the finger-type small rocker arm 320 is disposed on the upper side of the exhaust valve 220;

[0078] A finger-type rocker arm shaft 330, wherein the finger-type rocker arm shaft 330 is disposed inside the finger-type small rocker arm 320 and the cylinder head 200, so that the finger-type small rocker arm 320 is linked to the cylinder head 200;

[0079] An intake camshaft 300, wherein the intake camshaft 310 is disposed on the upper side of the intake camshaft hole of the cylinder head 200;

[0080] An exhaust camshaft 310, wherein the exhaust camshaft 310 is disposed on an upper side of an exhaust camshaft hole of the cylinder head 200;

[0081] A box body 400, wherein the box body 400 is used to install the crankshaft 410 and the cylinder head 200;

[0082] A crankshaft 410, wherein a timing driving sprocket 411 is provided on the crankshaft 410;

[0083] Timing chain 510;

[0084] Timing chain guide bar 520;

[0085] Timing chain tensioner 530;

[0086] Timing chain tensioner 540;

[0087] In the engine of this embodiment, the crankshaft 410 is installed in the housing 400. When the crankshaft 410 rotates, the timing driving sprocket 411 provided thereon causes the timing chain 510 hung thereon to move, and the other end of the timing chain 510 links the intake camshaft 300 and the exhaust camshaft 310, so that the intake camshaft 300 and the exhaust camshaft 310 perform rotational motion in the camshaft hole of the cylinder head 200.

[0088] In the engine of this embodiment, the intake camshaft 300 is provided with a cam. When the intake camshaft 300 rotates, the valve tappet 290 is driven to move along the axial direction, thereby driving the valve clearance adjustment gasket 280 to move along the axial direction of the intake valve; the valve clearance adjustment gasket 280 pushes the intake valve 210 to move along the axial direction; as the intake camshaft 300 rotates, the intake valve 210 is reset by the valve inner spring 240, the valve outer spring 250, the valve spring upper seat 260 and the valve lock clamp 270. The intake valve 210 performs a reciprocating high-frequency motion during the rotation of the intake camshaft 300;

[0089] In the engine of this embodiment, the exhaust camshaft 310 is provided with a cam. When the exhaust camshaft 310 rotates, the finger-type small rocker arm 320 is driven to rotate with the finger-type rocker arm shaft 330, thereby driving the valve clearance adjustment gasket 280 to move along the axial direction of the exhaust valve; the valve clearance adjustment gasket 280 pushes the exhaust valve 220 to move along the axial direction; as the exhaust cam rotates, the exhaust valve 220 is reset by the valve inner spring 240, the valve outer spring 250, the valve spring upper seat 260 and the valve lock clamp 270. The exhaust valve 220 performs reciprocating high-frequency motion during the rotation of the exhaust camshaft 310;

[0090] In the engine of this embodiment, the timing chain 510 moves in a shape in which the timing chain guide bar 520, the timing chain tensioning bar 530, and the timing chain tensioner 540 are fixed.

[0091] In the engine of this embodiment, the valve tappet 290 structure is used on the intake side, and the finger-type small rocker arm 320 structure is used on the exhaust side. Because the engine of this embodiment requires the use of a dual valve spring structure on both the intake and exhaust sides, the intake side requires the performance of the engine, and the size space occupied by the intake valve 210 is sufficient to design a dual valve spring, and there is no situation where the size N is too small, so the valve tappet 290 structure can be used; and on the exhaust side, because the distance M between the two exhaust valves 220 is small, if the The valve tappet 290 structure will cause the dimension N to be too small, that is, it cannot withstand the supporting force of the exhaust camshaft and cannot form an oil film to protect the camshaft. Therefore, in order to ensure that the dimension N meets the design requirements, the finger-type small rocker arm 320 mechanism is adopted. This ensures that the dual valve spring structure continues to be used, thereby improving the reliability of the valve mechanism and ensuring the engine performance and design size requirements; similarly, on the intake valve side, the space occupied by the intake valve size is large enough, and there is no problem of the dimension N being too small, so the valve tappet 290 structure is used.

[0092] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. 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 of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An engine, characterized in that: The engine comprises: A cylinder head, wherein an intake valve seat ring, an exhaust valve seat ring, and a valve guide are arranged in the cylinder head, and the cylinder head has an intake camshaft hole and an exhaust camshaft hole; the cylinder head is provided with a valve lower spring seat mounting surface; the cylinder head is provided with a rocker arm shaft hole; An intake valve, wherein the intake valve is arranged in an intake valve seat ring, and the intake valve is arranged in a valve guide; An exhaust valve, wherein the exhaust valve is disposed in an exhaust valve seat ring, and the exhaust valve is disposed in a valve guide; A valve spring lower seat, the valve spring lower seat being arranged on the upper side of the valve lower spring seat mounting surface of the cylinder head; A valve inner spring, wherein the valve inner spring is arranged on the upper side of the valve spring lower seat; A valve outer spring, the valve outer spring being arranged on the upper side of the valve spring lower seat; A valve spring upper seat, the valve spring upper seat being arranged on the upper side of the inner and outer springs of the valve; A valve lock clip, which is arranged on the upper seat of the valve spring and the upper side of the valve, and is locked to the intake and exhaust valves so that the valves are subjected to the force of the valve spring; A valve clearance adjustment gasket, wherein the valve clearance adjustment gasket is arranged on the upper side of the intake and exhaust valves; A valve tappet, the valve tappet being arranged on the upper side of the intake valve; A finger-type small rocker arm, wherein the finger-type small rocker arm is arranged on the upper side of the exhaust valve; A finger-type rocker arm shaft, which is arranged inside the finger-type small rocker arm and the cylinder head, so that the finger-type small rocker arm and the cylinder head are connected; an intake camshaft, which is arranged on the upper side of the intake camshaft hole of the cylinder head; An exhaust camshaft is arranged on the upper side of an exhaust camshaft hole of a cylinder head.

2. The engine according to claim 1, characterized in that The engine also includes: A camshaft seat cover is arranged on the cylinder head and is provided with a camshaft hole.

3. The engine according to claim 2, characterized in that The camshaft seat cover also includes: The fastening bolts are fixed to the cylinder head to tighten the intake and exhaust camshafts and the camshaft seat.

4. The engine according to claim 1, characterized in that: The intake valve and the intake valve seat ring are aligned in axial direction; The valve tappet is arranged inside the intake valve hole of the cylinder head; The axial direction of the valve tappet coincides with the axial direction of the intake valve.

5. The engine according to claim 1, characterized in that: The exhaust valve and the exhaust valve seat ring are aligned in axial direction; The finger-type small rocker arm is arranged on the exhaust valve side of the cylinder head; The finger-type rocker arm shaft, the finger-type small rocker arm and the cylinder head rocker arm hole are aligned in axial direction.

6. The engine according to claim 1, characterized in that: The intake camshaft is arranged on the upper side of the intake valve; the axis of the intake camshaft is perpendicular to the axis of the intake valve; The exhaust camshaft is arranged on the upper side of the exhaust valve; the axis of the intake camshaft is perpendicular to the axis of the intake valve.

7. The engine according to claim 1, characterized in that: A valve tappet, an intake valve, a valve inner spring, and a valve outer spring are arranged below the intake camshaft. During the rotation of the intake camshaft, the valve tappet is driven to compress the intake valve and move downward, and the valve inner spring and the valve outer spring reset the intake valve. A finger-type rocker arm, an exhaust valve, an inner spring and an outer spring are arranged below the exhaust camshaft. During the rotation of the exhaust camshaft, the finger-type rocker arm is driven to compress the exhaust valve and move downward, and the valve inner spring and the valve outer spring reset the exhaust valve.

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