Valve lift adjusting device, engine and power equipment

Abstract

The utility model relates to a valve lift adjusting device, an engine and power equipment. The adjusting device comprises a first rocker arm assembly and a second rocker arm assembly, wherein the first rocker arm assembly is suitable for abutting against a driving mechanism; the second rocker arm assembly is suitable for abutting against a valve assembly, the first rocker arm assembly and the second rocker arm assembly are rotationally connected, and an included angle is formed between the first rocker arm assembly and the second rocker arm assembly; and the adjusting mechanism is connected with the first rocker arm assembly and the second rocker arm assembly, and the adjusting mechanism is suitable for adjusting the positions of the first rocker arm assembly and the second rocker arm assembly and / or the size of the included angle so as to adjust the valve lift.

Description

Technical Field

[0001] The utility model relates to the technical field of transportation tools, and more specifically, to a valve lift regulating device, an engine and a power device. Background Art

[0002] In the related art, the opening and closing of the engine valve is adjusted by a lever. The engine valve lift is adjusted by changing the fulcrum position of the lever. However, the fulcrum position usually needs to overcome a large resistance when adjusting, which makes the adjustment of the valve lift difficult.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0004] One object of the utility model is to provide a valve lift regulating device.

[0005] According to one aspect of the utility model, a valve lift adjustment device is provided. The adjustment device comprises:

[0006] a first rocker arm assembly, the first rocker arm assembly being adapted to abut against a drive mechanism;

[0007] a second rocker arm assembly, the second rocker arm assembly being adapted to abut against the valve assembly, the first rocker arm assembly and the second rocker arm assembly being rotatably connected, and the first rocker arm assembly and the second rocker arm assembly forming an included angle; and

[0008] An adjusting mechanism, wherein the adjusting mechanism is respectively connected to the first rocker arm assembly and the second rocker arm assembly, and the adjusting mechanism is suitable for adjusting the position and / or angle of the first rocker arm assembly and the second rocker arm assembly to adjust the valve lift.

[0009] Optionally, the first rocker arm assembly includes a first rocker arm and a third rocker arm, the second rocker arm assembly includes a second rocker arm and a fourth rocker arm, the first rocker arm is rotationally connected to the second rocker arm, the third rocker arm is rotationally connected to the fourth rocker arm, the third rocker arm is rotationally connected to the first rocker arm, the second rocker arm is rotationally connected to the fourth rocker arm, the first rocker arm is suitable for counteracting with a driving mechanism, and the second rocker arm is suitable for counteracting with a valve assembly.

[0010] Optionally, the first rocker arm and the second rocker arm are rotatably connected via a first rotating shaft, and the third rocker arm and the fourth rocker arm are rotatably connected via a second rotating shaft;

[0011] The adjusting mechanism is suitable for being connected to the first rotating shaft and / or the second rotating shaft, and the adjusting mechanism is used to adjust the position of the first rotating shaft and / or the second rotating shaft.

[0012] Optionally, the adjustment mechanism comprises a first movable component, and the first movable component is suitable for being rotatably connected to the first rotating shaft.

[0013] Optionally, the first moving assembly includes a first power element and a first rack, the first power element is meshed with the first rack, and the first rack is rotatably connected to the first rotating shaft.

[0014] Optionally, it also includes a first guide element, which has two openings arranged opposite to each other and a first sliding groove located on the side, the first rocker arm and the second rocker arm extend from the two openings respectively, and the first rotating shaft is slidably arranged in the first sliding groove.

[0015] Optionally, an extension direction of the first sliding groove is parallel to an axial direction of the first rack.

[0016] Optionally, the first guide element is further provided with a first through hole, and the first rack is passed through the first through hole.

[0017] Optionally, a hole wall of the first through hole is provided with a limiting groove, and the rack is slidably arranged in the limiting groove.

[0018] Optionally, the adjustment mechanism comprises a second movable component, and the second movable component is suitable for being rotatably connected to the second rotating shaft.

[0019] Optionally, the second moving assembly includes a second power element and a second rack, the second power element is meshed with the second rack, and the second rack is rotationally connected to the second rotating shaft.

[0020] Optionally, the second rack includes a rack body and a guide portion, the guide portion is connected to one end of the rack body, the guide portion is provided with a guide groove, and the second rotating shaft is arranged in the guide groove.

[0021] Optionally, the guide groove is an arc-shaped groove with an inner arc facing the first rotating shaft.

[0022] Optionally, it further includes a second guide element, which is provided with a second slide groove; the second rack also includes a slider, which is connected to the rack body and / or the guide part, and the slider is slidably arranged in the second slide groove.

[0023] Optionally, an extension direction of the second sliding groove is parallel to an axial direction of the rack body.

[0024] Optionally, the second rack includes a connecting portion, the rack body and the guide portion are both in number, the two rack bodies are arranged side by side, and the connecting portion is respectively connected to one end of the two rack bodies which are away from the guide portion.

[0025] Optionally, an opening direction of an angle between the first rocker arm and the second rocker arm is the same as or opposite to an opening direction of an angle between the third rocker arm and the fourth rocker arm.

[0026] According to a second aspect of the present application, an engine is provided, which includes the above-mentioned valve lift adjustment mechanism.

[0027] According to a third aspect of the present application, a power device is provided, which includes the above-mentioned engine.

[0028] One technical effect of the utility model is that the valve lift adjustment device includes a first rocker arm assembly and a second rocker arm assembly that are rotatably connected together. The first rocker arm assembly serves as a power arm and can receive force from a driving mechanism. The second rocker arm assembly serves as a resistance arm and can transmit force to the valve assembly. The first rocker arm assembly and the second rocker arm assembly can swing around the rotation connection point between the two to achieve the opening and closing of the valve. The adjustment mechanism can increase or decrease the valve lift by adjusting the position and / or angle of the first rocker arm assembly and the second rocker arm assembly, thereby meeting the intake requirements of the engine under different working conditions. The valve lift adjustment device has a simple structure and a short transmission path. In addition, the position adjustment and angle adjustment of the first rocker arm assembly and the second rocker arm assembly do not require overcoming large resistance, which makes the valve lift adjustment labor-saving.

[0029] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0031] Figure 1 It is a schematic structural diagram of a valve lift adjustment device, a camshaft and a valve assembly according to an embodiment of the present application.

[0032] Figure 2 It is a stereoscopic diagram of a valve lift adjustment device, a camshaft and a valve assembly according to an embodiment of the present application.

[0033] Figure 3 It is a schematic diagram of the structure of a valve lift adjustment device according to an embodiment of the present application.

[0034] Figure 4 It is a stereoscopic diagram of a valve lift adjustment device according to an embodiment of the present application.

[0035] Figure 5 It is a stereoscopic view of a first guide element according to an embodiment of the present application.

[0036] Figure 6 It is a stereoscopic view of a first rocker arm assembly and a second rocker arm assembly according to an embodiment of the present application.

[0037] Figure 7 It is a partial schematic diagram of a valve lift adjustment device according to an embodiment of the present application.

[0038] Figure 8 It is an assembly diagram of the second motor and the second rack according to an embodiment of the present application.

[0039] Fig. 9 It is an assembly diagram of the first motor and the first rack according to an embodiment of the present application.

[0040] Fig.10 is a stereoscopic view of a second guide element according to an embodiment of the present application.

[0041] Fig.11 It is a schematic diagram of the structure of the valve lift adjustment device in the cylinder deactivation mode according to an embodiment of the present application.

[0042] Fig.12 It is a schematic structural diagram of another valve lift adjustment device according to an embodiment of the present application.

[0043] Reference numerals:

[0044] 101. first rocker arm; 102. second rocker arm; 103. third rocker arm; 104. fourth rocker arm; 105. first rotating shaft; 106. second rotating shaft; 107. camshaft; 108. hydraulic tappet; 109. roller; 110. fifth rocker arm; 111. valve; 112. first motor; 113. second motor; 114. first rack; 115. first guide element; 1151. first opening; 1152. second opening; 1153. first slide groove; 1154. first through hole; 1155. limiting groove; 116. second rack; 1161. rack body; 1162. guide portion; 1163. guide groove; 1164. slider; 1165. connecting portion; 117. second guide element; 1171. second slide groove. DETAILED DESCRIPTION

[0045] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0046] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0047] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0048] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0049] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] According to one embodiment of the present application, a valve lift adjustment device is provided. Figure 1 to Figure 2 As shown, the regulating device comprises:

[0051] a first rocker arm assembly, the first rocker arm assembly being adapted to abut against a drive mechanism;

[0052] a second rocker arm assembly, the second rocker arm assembly being adapted to abut against the valve assembly, the first rocker arm assembly and the second rocker arm assembly being rotatably connected, and the first rocker arm assembly and the second rocker arm assembly forming an included angle; and

[0053] An adjusting mechanism, wherein the adjusting mechanism is respectively connected to the first rocker arm assembly and the second rocker arm assembly, and the adjusting mechanism is suitable for adjusting the position and / or angle of the first rocker arm assembly and the second rocker arm assembly to adjust the valve lift.

[0054] Specifically, if Figures 1 to 4 As shown, the valve lift adjustment device is arranged on the cylinder head of the engine. The first rocker arm assembly includes one rocker arm or multiple rocker arms. The second rocker arm assembly includes one rocker arm or multiple rocker arms. The first rocker arm assembly and the second rocker arm assembly are rotatably connected, for example, by a rotating shaft or a flexible component. The angle between the first rocker arm assembly and the second rocker arm assembly is fixed by an adjustment mechanism. The first rocker arm assembly and the second rocker arm assembly are located between the driving mechanism and the valve assembly. The driving mechanism is used to provide a driving force to drive the first rocker arm assembly and the second rocker arm assembly to swing around the rotating connection point between the two. For example, the driving mechanism includes a driving motor and a camshaft 107. The second rocker arm assembly can be offset against the valve assembly. The camshaft 107 is mounted on the driving shaft of the driving motor. When working, the first rocker arm assembly can be offset against the camshaft 107. The camshaft 107 includes a base circle and a protrusion. The base circle and the protrusion have a smooth transition. When the base circle contacts the first rocker arm assembly, the valve 111 is in a closed state. When the protrusion contacts the first rocker arm assembly, the second rocker arm assembly pushes the valve assembly to open the valve 111.

[0055] like Figure 1 to Figure 2 As shown, the valve assembly includes a fifth rocker arm 110, a hydraulic tappet 108, a roller 109 and a valve 111. The roller 109 is rotatably connected to the middle part of the fifth rocker arm 110. The hydraulic tappet 108 is connected to one end of the fifth rocker arm 110. The valve 111 is connected to the other end of the fifth rocker arm 110. The fifth rocker arm 110 swings with the rotation connection point between the hydraulic tappet 108 and the fifth rocker arm 110 as a fulcrum. The second rocker arm assembly can abut against the roller 109. For example, the second rocker arm assembly presses down the roller 109 so that the fifth rocker arm 110 swings clockwise to drive the valve 111 to move axially along the valve 111 so that the valve 111 opens. In other examples, the valve assembly includes the valve 111. The second rocker arm assembly can be directly abutted against the valve 111.

[0056] like Figure 1 , Figure 2 As shown, the angle between the first rocker arm assembly and the second rocker arm assembly is an acute angle. The first rocker arm assembly serves as a power arm. The second rocker arm assembly serves as a resistance arm. The adjusting mechanism is rotatably connected to the first rocker arm assembly and the second rocker arm assembly, respectively. For example, the adjusting mechanism can adjust the position of the first rocker arm assembly and the second rocker arm assembly. When the first rocker arm assembly and the second rocker arm assembly move right, the distance from the rotating connection point to the camshaft 107 and the roller 109 decreases, thereby reducing the force arm of the swing of the second rocker arm assembly and reducing the valve lift. When the first rocker arm assembly and the second rocker arm assembly move left, the distance from the rotating connection point to the camshaft 107 and the roller 109 increases, thereby increasing the force arm of the swing of the second rocker arm assembly and increasing the valve lift. Alternatively, the adjusting mechanism can adjust the angle between the first rocker arm assembly and the second rocker arm assembly. When the angle decreases, the force arm of the swing of the second rocker arm assembly decreases, and the valve lift decreases. When the angle increases, the force arm of the swing of the second rocker arm assembly increases, and the valve lift increases. Alternatively, the adjustment mechanism simultaneously adjusts the position of the first rocker arm assembly and the second rocker arm assembly and the angle between the two to adjust the valve lift. Fig.11 As shown, the adjustment mechanism can also separate the first rocker arm assembly from the camshaft 107 and / or the second rocker arm assembly from the roller 109 to achieve the valve 111 closing the cylinder, that is, the engine cylinder is closed. Under set working conditions, such as when the vehicle is running at high speed, the energy consumption of the vehicle can be reduced.

[0057] Of course, the angle between the first rocker arm assembly and the second rocker arm assembly is not limited to an acute angle, and may also be a right angle, an obtuse angle, etc. The material of the first rocker arm assembly and the second rocker arm assembly is metal, inorganic non-metal, etc. Those skilled in the art may set it according to actual needs.

[0058] In an embodiment of the present application, the valve lift adjustment device includes a first rocker arm assembly and a second rocker arm assembly that are rotatably connected together. The first rocker arm assembly serves as a power arm and can receive force from a driving mechanism. The second rocker arm assembly serves as a resistance arm and can transmit force to the valve assembly. The first rocker arm assembly and the second rocker arm assembly can swing around the rotation connection point between the two to achieve the opening and closing of the valve 111. The adjustment mechanism can increase or decrease the valve lift by adjusting the position and / or angle of the first rocker arm assembly and the second rocker arm assembly, thereby meeting the intake requirements of the engine under different working conditions. The valve lift adjustment device has a simple structure and a short transmission path. In addition, the position adjustment and angle adjustment of the first rocker arm assembly and the second rocker arm assembly do not require overcoming large resistance, which makes the valve lift adjustment labor-saving.

[0059] In one example, the first rocker arm assembly includes a first rocker arm 101 and a third rocker arm 103, the second rocker arm assembly includes a second rocker arm 102 and a fourth rocker arm 104, the first rocker arm 101 is rotationally connected to the second rocker arm 102, the third rocker arm 103 is rotationally connected to the fourth rocker arm 104, the third rocker arm 103 is rotationally connected to the first rocker arm 101, the second rocker arm 102 is rotationally connected to the fourth rocker arm 104, the first rocker arm 101 is suitable for counteracting with a driving mechanism, and the second rocker arm 102 is suitable for counteracting with a valve assembly.

[0060] like Figures 1 to 4 , Figure 6 , Figure 7 As shown, the first rocker arm 101 and the second rocker arm 102 are straight arms or arc-shaped arms. One end of the first rocker arm 101 and one end of the second rocker arm 102 are rotatably connected together through a first rotating shaft 105. The third rocker arm 103 and the fourth rocker arm 104 are straight arms or arc-shaped arms. One end of the third rocker arm 103 and the fourth rocker arm 104 are rotatably connected through a second rotating shaft 106. The other end of the third rocker arm 103 is rotatably connected to the first rocker arm 101 through a pin shaft. The other end of the fourth rocker arm 104 is rotatably connected to the second rocker arm 102 through a pin shaft. The third rocker arm 103 and the fourth rocker arm 104 can support the first rocker arm 101 and the second rocker arm 102. The first rocker arm 101 can be offset against a driving mechanism to receive force from the driving mechanism. The second rocker arm 102 can be offset against a valve assembly to apply force to the valve assembly. The position and / or angle of the first rocker arm 101 and the second rocker arm 102 can be adjusted by adjusting the angle between the third rocker arm 103 and the fourth rocker arm 104. This makes it easy to adjust the position and / or angle of the first rocker arm assembly and the second rocker arm assembly.

[0061] In an example, an opening direction of an angle between the first rocker arm 101 and the second rocker arm 102 is the same as or opposite to an opening direction of an angle between the third rocker arm 103 and the fourth rocker arm 104 .

[0062] like Figure 1 As shown, in this example, the opening direction of the angle between the first rocker arm 101 and the second rocker arm 102 is the same as the opening direction of the angle between the third rocker arm 103 and the fourth rocker arm 104. For example, the length of the first rocker arm 101 is greater than the length of the third rocker arm 103. One end of the third rocker arm 103 is rotatably connected to the middle position of the first rocker arm 101. The length of the second rocker arm 102 is greater than the length of the fourth rocker arm 104. One end of the fourth rocker arm 104 is rotatably connected to the middle position of the second rocker arm 102. In this way, the third rocker arm 103 and the fourth rocker arm 104 are located between the first rocker arm 101 and the second rocker arm 102, thereby saving the installation space of the valve lift adjustment device.

[0063] like Fig.12 As shown, the opening direction of the angle between the first rocker arm 101 and the second rocker arm 102 is opposite to the opening direction of the angle between the third rocker arm 103 and the fourth rocker arm 104. In this way, the first rocker arm 101, the second rocker arm 102, the third rocker arm 103 and the fourth rocker arm 104 form an approximately parallelogram structure. This arrangement makes it possible for the third rocker arm 103 and the fourth rocker arm 104 to be assembled without interference from the first rocker arm 101 and the second rocker arm 102, making it easy to assemble the valve lift adjustment device.

[0064] Optionally, the third rocker arm 103 and the fourth rocker arm 104 are made of metal, inorganic non-metal, etc. Those skilled in the art can make settings according to actual needs.

[0065] In one example, the first rocker arm 101 and the second rocker arm 102 are rotatably connected via a first rotating shaft 105, and the third rocker arm 103 and the fourth rocker arm 104 are rotatably connected via a second rotating shaft 106;

[0066] The adjusting mechanism is suitable for being connected to the first rotating shaft 105 and / or the second rotating shaft 106 , and the moving component is used for adjusting the position of the first rotating shaft 105 and / or the second rotating shaft 106 .

[0067] like Figure 1 , Figure 2 As shown, the adjustment mechanism is, for example, electrically driven or pneumatically driven. The adjustment mechanism can move the position of the first rotating shaft 105 and / or the second rotating shaft 106, thereby driving the first rocker arm 101, the second rocker arm 102 and / or the third rocker arm 103, and the fourth rocker arm 104 to move, so as to adjust the position and / or angle of the first rocker arm 101 and the second rocker arm 102.

[0068] Of course, the configuration of the adjustment mechanism is not limited here, and those skilled in the art can make a selection according to actual needs.

[0069] In one example, the adjustment mechanism includes a first moving component, and the first moving component is suitable for being rotatably connected to the first rotating shaft 105 .

[0070] like Figure 1 , Figure 2 As shown, the first moving assembly is rotationally connected to the first rotating shaft 105. For example, the first moving assembly can move the first rotating shaft 105 leftward or rightward to drive the first rocker arm 101 and the second rocker arm 102 to move. The rotational connection has low friction, which makes the movement of the first rocker arm 101 and the second rocker arm 102 more labor-saving.

[0071] Of course, the specific structure and connection method of the first moving component are not limited here, and those skilled in the art can set them according to actual needs.

[0072] In one example, the first moving assembly includes a first power element and a first rack 114 , the first power element is meshed with the first rack 114 , and the first rack 114 is rotatably connected to the first rotating shaft 105 .

[0073] like Figures 1 to 4 , Fig. 9 As shown, the first power element includes a first motor 112. A gear is provided on the output shaft of the first motor 112. A hinge hole is provided at one end of the first rack 114. The first rotating shaft 105 passes through the hinge hole to be rotatably connected with the first rack 114. The first rack 114 has teeth below. The first rack 114 is meshed with the gear of the first motor 112. The first rack 114 is driven to move left and right by the first motor 112, thereby driving the first rotating shaft 105 to move left and right. The first moving component has a simple structure and is easy to install.

[0074] Of course, the first moving component is not limited to the above embodiments, and those skilled in the art can configure it according to actual needs.

[0075] In one example, the adjustment mechanism also includes a first guide element 115, the first guide element 115 having two openings arranged opposite to each other and a first slide groove 1153 located on the side, the first rocker arm 101 and the second rocker arm 102 extend from the two openings respectively, and the first rotating shaft 105 is slidably arranged in the first slide groove 1153.

[0076] like Figures 3 to 5As shown, the first guide element 115 is a rectangular parallelepiped as a whole. The material of the first guide element 115 is metal, inorganic non-metal, etc. An accommodating cavity is arranged inside the first guide element 115. The top and bottom of the first guide element 115 are provided with openings, namely, a first opening 1151 and a second opening 1152. The first guide element 115 is provided with first slide grooves 1153 on two opposite sides. The two openings and the two first slide grooves 1153 are both connected to the accommodating cavity. Parts of the first rotating shaft 105, the first rocker arm 101, and the second rocker arm 102 are located in the accommodating cavity. The first rocker arm 101 extends out of the first opening 1151. The first rocker arm 101 can swing in the first opening 1151. The second rocker arm 102 extends out of the second opening 1152. The second rocker arm 102 can swing in the second opening 1152. The two ends of the first rotating shaft 105 are respectively located in the two first slide grooves 1153 and can slide along the first slide grooves 1153.

[0077] In this example, the first opening 1151 can guide the swing of the first rocker arm 101, and the second opening 1152 can guide the swing of the second rocker arm 102, thereby preventing the first rocker arm 101 and the second rocker arm 102 from deflecting. The two first slide slots 1153 can guide the movement of the first rotating shaft 105, so that the movement of the first rotating shaft 105 is smoother, and the position and / or angle adjustment of the first rocker arm 101 and the second rocker arm 102 is more accurate. In addition, the first guide element 115 can also protect the first rocker arm 101, the second rocker arm 102, and the first rotating shaft 105.

[0078] Of course, the structure of the first guide element 115 is not limited to the above embodiment. The first guide element 115 may also be provided with only one first slide groove 1153. Those skilled in the art may provide the first guide element 115 according to actual needs, without being limited to the above embodiment.

[0079] In an example, an extending direction of the first sliding groove 1153 is parallel to an axial direction of the first rack 114 .

[0080] like Figure 3 , Figure 4 As shown, the extension direction of the first slide slot 1153 is along the horizontal direction. The first shaft 105 slides along the extension direction of the first slide slot 1153. The axial direction of the first rack 114 is along the horizontal direction. This arrangement reduces the resistance of the first rack 114 to movement, so that the first rack 114 drives the first shaft 105 to move more smoothly.

[0081] Of course, when the extension direction of the first slide groove 1153 is not parallel to the axial direction of the first rack 114 , the first rack 114 can also drive the first shaft 105 to slide along the first slide groove 1153 , but the resistance to the sliding of the first shaft 105 will be greater.

[0082] In an example, the first guide element 115 is further provided with a first through hole 1154 , and the first rack 114 is passed through the first through hole 1154 .

[0083] like Figures 1 to 5 As shown, a first through hole 1154 is provided at one end of the long side of the first guide element 115. The first rack 114 is inserted into the first through hole 1154 and is rotatably connected to the first rotating shaft 105. For example, the first rack 114 is located between the first rocker arm 101 and the second rocker arm 102, so that the swing of the first rocker arm 101 and the second rocker arm 102 is more balanced. The extension direction of the first through hole 1154 is parallel to the extension direction of the first slide slot 1153. The first through hole 1154 guides the sliding of the first rack 114 to prevent the first rack 114 from being deflected.

[0084] In an example, a hole wall of the first through hole 1154 is provided with a limiting groove 1155 , and the rack is slidably disposed in the limiting groove 1155 .

[0085] like Figure 5 As shown, a limiting groove 1155 is provided on the upper side of the hole wall of the first through hole 1154. The limiting groove 1155 is an axially extending notch formed on the hole wall of the first through hole 1154. The longitudinal cross-section of the first rack 114 is rectangular, circular, elliptical, etc. The longitudinal cross-section of the limiting groove 1155 matches the local size of the longitudinal cross-section of the first rack 114. The limiting groove 1155 can effectively limit the movement of the first rack 114 in the axial direction perpendicular to the first through hole 1154, further avoiding the first rack 114 from being deflected due to excessive resistance during the sliding process.

[0086] Of course, the structure of the first through hole 1154 is not limited to the above embodiment, and those skilled in the art can configure it according to actual needs.

[0087] In one example, the first guide element 115 is integrally formed.

[0088] For example, the first guide element 115 is formed by casting, stamping, drilling, etc. This makes the first guide element 115 have higher structural strength, simpler processing technology, and higher yield.

[0089] Of course, the first guide element 115 can also be manufactured by processing and forming each part separately and then assembling them. Those skilled in the art can make settings according to actual needs, which is not limited here.

[0090] In one example, the adjustment mechanism includes a second moving component, and the second moving component is adapted to be rotatably connected to the second rotating shaft 106 .

[0091] like Figure 1 , Figure 2 As shown, the second moving assembly is rotationally connected to the second rotating shaft 106. For example, the second moving assembly can move the second rotating shaft 106 left or right to drive the third rocker arm 103 and the fourth rocker arm 104 to move. The rotational connection has low friction, which makes the movement of the third rocker arm 103 and the fourth rocker arm 104 more labor-saving.

[0092] Of course, the specific structure and connection method of the second moving component are not limited here, and those skilled in the art can set them according to actual needs.

[0093] The first moving assembly and the second moving assembly cooperate with each other to adjust the position and / or angle of the first rocker arm 101 and the second rocker arm 102. For example, the first moving assembly drives the first rotating shaft 105 to move rightward, and the second moving assembly drives the second rotating shaft 106 to move rightward, thereby changing the length of the lever arm of the first rocker arm 101 and the lever arm of the second rocker arm 102, so that the valve lift increases.

[0094] For example, the first moving assembly drives the first rotating shaft 105 to move leftward, and the second moving assembly drives the second rotating shaft 106 to move leftward. The amount of the second rotating shaft 106 moving leftward is greater than the amount of the first rotating shaft 105 moving leftward, so that the angle between the first rocker arm 101 and the second rocker arm 102 is reduced. During the movement, the first rocker arm 101 contacts the camshaft 107, and the second rocker arm 102 contacts the roller 109. Since the moment arm of the first rocker arm 101 and the second rocker arm 102 is reduced, the valve lift is reduced.

[0095] It should be noted that no matter whether the valve lift increases or decreases, it should be ensured that the valve 111 is in a closed state when the base circle of the camshaft 107 contacts the first rocker arm 101 .

[0096] In one example, the second moving assembly includes a second power element and a second rack 116 , the second power element is meshed with the second rack 116 , and the second rack 116 is rotatably connected to the second rotating shaft 106 .

[0097] like Figures 1 to 4 , Figure 7 , Figure 8 As shown, the second power element includes a second motor 113. A gear is provided on the output shaft of the second motor 113. The second rotating shaft 106 is rotatably connected with the second rack 116. The second rack 116 has teeth below. The second rack 116 is meshed with the gear of the second motor 113. The second motor 113 drives the second rack 116 to move left and right, thereby driving the second rotating shaft 106 to move left and right. The second moving assembly has a simple structure and is easy to install.

[0098] Of course, the second moving component is not limited to the above embodiments, and those skilled in the art can configure it according to actual needs.

[0099] In an example, the second rack 116 includes a rack body 1161 and a guide portion 1162 , wherein the guide portion 1162 is connected to one end of the rack body 1161 , and the guide portion 1162 is provided with a guide groove 1163 , and the second rotating shaft 106 is disposed in the guide groove 1163 .

[0100] like Figure 8 As described, teeth are provided below the rack body 1161. The gear of the second motor 113 meshes with the teeth of the rack body 1161. A guide portion 1162 is provided at the end of the rack body 1161. The guide portion 1162 is provided with a guide groove 1163. The second rotating shaft 106 is slidably provided in the guide groove 1163. The second rotating shaft 106 can slide along the extension direction of the guide groove 1163, so that when the first rocker arm 101 and the second rocker arm 102 swing, the third rocker arm 103 and the fourth rocker arm 104 can swing together. The guide groove 1163 defines the axial position of the second rotating shaft 106 along the rack body 1161. In this way, the second motor 113 drives the rack body 1161 to move, and the rack body 1161 drives the second rotating shaft 106 to move through the guide portion 1162, thereby adjusting the position and / or angle of the first rocker arm 101 and the second rocker arm 102.

[0101] Of course, the connection method between the rack body 1161 and the guide part 1162, the length of the guide groove 1163, etc. are not limited here, and those skilled in the art can set them according to actual needs.

[0102] In an example, the guide groove 1163 is an arc-shaped groove with an inner arc facing the first rotating shaft 105 .

[0103] like Figure 4 , Figure 8 As shown, the guide groove 1163 is an arc groove and the inner arc of the arc groove faces the first rotating shaft 105. When the first rocker arm assembly and the second rocker arm assembly swing, the second rotating shaft 106 moves along the arc groove around the first rotating shaft 105. The groove wall of the arc groove, such as the radial side wall, plays a limiting role on the second rotating shaft 106. When the second moving assembly moves, the guide portion 1162 pushes the second rotating shaft 106 located in the arc groove to move, thereby adjusting the size of the angle between the third rocker arm 103 and the fourth rocker arm 104.

[0104] Furthermore, the arc groove takes the first rotating shaft 105 as the center. During operation, the first rocker arm 101 and the second rocker arm 102 swing with the first rotating shaft 105 as the center. The third rocker arm 103 and the fourth rocker arm 104 swing simultaneously with the first rocker arm 101 and the second rocker arm 102, that is, the second rotating shaft 106 swings with the first rotating shaft 105 as the center so that the swinging of the third rocker arm 103 and the fourth rocker arm 104 is not interfered. The arc groove can make the second rotating shaft 106 swing more smoothly around the first rotating shaft 105, avoiding the deflection of the third rocker arm 103 and the fourth rocker arm 104 during the swinging process.

[0105] It should be noted that, during the process of adjusting the valve lift, the distance between the first rotating shaft 105 and the second rotating shaft 106 may change, which may cause the groove wall of the guide groove 1163 to interfere with the movement of the second rotating shaft 106 and cause it to get stuck. In order to avoid the above problem, the width of the guide groove 1163 is greater than the diameter of the second rotating shaft 106. This allows the second rotating shaft 106 to have space to move in the radial direction of the guide groove 1163, thereby avoiding the groove wall of the guide groove 1163 from getting stuck or interfering with the rotation of the second rotating shaft 106.

[0106] Of course, the curvature of the arc-shaped groove is not limited here, and those skilled in the art can set it according to actual needs.

[0107] In one example, the valve lift adjustment device also includes a second guide element 117, and the second guide element 117 is provided with a second slide groove 1171; the second rack 116 also includes a slider 1164, and the slider 1164 is connected to the rack body 1161 and / or the guide portion 1162, and the slider 1164 is slidably set in the second slide groove 1171.

[0108] like Figure 7 , Figure 8 , Fig.10As shown, the second guide element 117 is in a strip shape as a whole. The second guide element 117 is provided with a second slide groove 1171 extending axially. The slider 1164 is a quadrilateral structure. Among them, the long side is a straight side and the short side is an arc side. The long side is parallel to the axial direction of the second slide groove 1171. Compared with the slider 1164 of a central symmetrical shape, the slider 1164 of the quadrilateral structure makes the slider 1164 have better directionality during the sliding process. The slider 1164 is fixed to one side of the guide portion 1162 by means of clamping, welding, etc. The slider 1164 protrudes from the outside of the guide portion 1162. For example, the slider 1164 crosses the width direction of the guide groove 1163. This makes the slider 1164 not interfere with the sliding of the second rotating shaft 106 in the guide groove 1163. The slider 1164 can slide along the second slide groove 1171 to guide the sliding of the second rack 116. The sliding cooperation between the slider 1164 and the second slide groove 1171 can effectively limit the sliding direction of the second rack 116, thereby preventing the second rack 116 from being deflected during the process of adjusting the valve lift.

[0109] In addition, in this example, the second rack 116 includes a rack body 1161, a guide portion 1162 and a slider 1164 connected together. Preferably, the second rack 116 is an integral structure. For example, the integral structure is formed by casting, cutting, drilling, etc., so that the second rack 116 has high structural strength and simple processing. The second rack 116 can slide with the first rotating shaft 105 and can slide with the second guide element 117, so as to play a good guiding role.

[0110] Of course, the structures of the second guide element 117 and the slider 1164 are not limited to the above embodiment, and the slider 1164 may also be connected to the rack body 1161; or the slider 1164 is respectively connected to the guide part 1162 and the rack body 1161. Those skilled in the art may make settings according to actual needs.

[0111] In an example, an extending direction of the second sliding groove 1171 is parallel to an axial direction of the rack body 1161 .

[0112] like Figure 3 , Figure 4 , Figure 7 As shown, the extension direction of the second slide groove 1171 is along the horizontal direction. The slider 1164 slides along the extension direction of the second slide groove 1171. The axial direction of the rack body 1161 is along the horizontal direction. This arrangement reduces the resistance of the rack body 1161 to movement, so that the rack body 1161 drives the slider 1164 to move more smoothly.

[0113] Of course, when the extension direction of the second sliding groove 1171 is not parallel to the axial direction of the rack body 1161 , the rack body 1161 can also drive the slider 1164 to slide along the second sliding groove 1171 .

[0114] In one example, the second rack 116 includes a connecting portion 1165 , the number of the rack bodies 1161 and the number of the guide portions 1162 are both two, the two rack bodies 1161 are arranged side by side, and the connecting portion 1165 is respectively connected to one end of the two rack bodies 1161 away from the guide portion 1162 .

[0115] like Figure 3 , Figure 4 , Figure 7 , Figure 8 As shown, the two rack bodies 1161 are parallel to each other. The connecting portion 1165 is located at one end of the two rack bodies 1161. The guide portion 1162 is located at the other end of the two rack bodies 1161. The two ends of the connecting portion 1165 are respectively connected to the ends of the two rack bodies 1161. The two guide portions 1162 are respectively connected to the other ends of the two rack bodies 1161. The second rack 116 also includes two sliders 1164. The two sliders 1164 are respectively connected to the two guide portions 1162. The above-mentioned connection method can be but is not limited to welding, clamping, riveting, bolt connection, etc. The two ends of the second rotating shaft 106 are respectively slidably set in the two guide grooves 1163. The two sliders 1164 are respectively slidably set in the two second slide grooves 1171.

[0116] In this example, at both ends of the axial direction of the second rotating shaft 106, the two guide grooves 1163 can guide the second rotating shaft 106, and the two second sliding grooves 1171 can guide the two sliding blocks 1164. This arrangement, on the one hand, avoids the third rocker arm 103 and the fourth rocker arm 104 from deflecting during the valve lift adjustment process, so that the third rocker arm 103 and the fourth rocker arm 104 move more smoothly; on the other hand, both sides of the third rocker arm 103 and the fourth rocker arm 104 can play a guiding role, so that the resistance to the movement of the third rocker arm 103 and the fourth rocker arm 104 is smaller, and the adjustment of the valve lift is more labor-saving.

[0117] In one example, the surface of the first shaft 105 that slides with the first slide groove 1153, the surface of the second shaft 106 that slides with the guide groove 1163, and the surface of the slider 1164 that slides with the second slide groove 1171 are all arc surfaces, which can effectively reduce the sliding resistance of the above sliding fit.

[0118] In a specific implementation of the present application, the working process of the valve lift adjustment device is as follows:

[0119] During operation, the positions of the first rotating shaft 105 and the second rotating shaft 106 on the engine are relatively fixed. The camshaft 107 rotates to press down the first rocker arm 101. The first rocker arm 101 transmits force to the second rocker arm 102 through the third rocker arm 103 and the fourth rocker arm 104. Since the relative distance between the first rotating shaft 105 and the second rotating shaft 106 remains unchanged, it can be ensured that the angle between the first rocker arm 101 and the second rocker arm 102 remains unchanged when the camshaft 107 is pressed down. The first rocker arm 101, the second rocker arm 102, the third rocker arm 103, and the fourth rocker arm 104 all swing around the first rotating shaft 105, so that the second rocker arm 102 presses down the roller 109, and presses down the fifth rocker arm 110 through the roller 109, and then presses down the valve 111 through the fifth rocker arm 110, so that the valve 111 is opened.

[0120] When the valve lift needs to be increased, such as Figure 1 As shown, the first motor 112 drives the first rack 114 to move rightward, and the second motor 113 drives the second rack 116 to move rightward. The movement between the first rack 114 and the second rack 116 satisfies the set relationship to ensure that the valve 111 can be normally closed when the base circle contacts the first rocker arm 101. After the first rotating shaft 105 and the second rotating shaft 106 move by the set value, the relative distance between the first rotating shaft 105 and the second rotating shaft 106 remains unchanged. Since the positions of the first rocker arm 101, the second rocker arm 102, the third rocker arm 103, and the fourth rocker arm 104 are changed as a whole, the length of the force arm of the first rocker arm 101 and the second rocker arm 102 is increased, so that the valve lift is increased.

[0121] like Figure 7 As shown, when the valve lift needs to be reduced, the first motor 112 drives the first rack 114 to move to the left. The first rack 114 drives the first rotating shaft 105 to move to the left. At the same time, the second motor 113 drives the second rack 116 to move to the left, and the guide portion 1162 of the second rack 116 drives the second rotating shaft 106 to move to the left. When the leftward displacement of the second rotating shaft 106 is greater than the leftward displacement of the first rotating shaft 105, the angle between the first rocker arm 101 and the second rocker arm 102 decreases. During the movement, the first rocker arm 101 and the second rocker arm 102 always maintain the roller circumference of the camshaft 107 base circle and the closed state of the valve 111. Due to the change of the force arm of the first rocker arm 101 and the second rocker arm 102, the valve lift is reduced. And the valve 111 is normally closed when the camshaft 107 base circle and the first rocker arm 101 are against each other.

[0122] The regulating device can also realize the function of engine cylinder deactivation, such as Fig.11As shown, the first rotating shaft 105 is kept stationary, and the second rotating shaft 106 is driven to move leftward by the second motor 113, and the angle between the third rocker arm 103 and the fourth rocker arm 104 is reduced. The reduction of the angle between the third rocker arm 103 and the fourth rocker arm 104 reduces the angle between the first rocker arm 101 and the second rocker arm 102. The first rocker arm 101 is disengaged from the camshaft 107, and the second rocker arm 102 is disengaged from the roller 109, thereby realizing the cylinder deactivation function of the engine.

[0123] Of course, the valve lift adjustment method is not limited to the above embodiments, and those skilled in the art can make settings according to actual needs.

[0124] According to another embodiment of the present application, an engine is provided, which includes the valve 111 production adjustment mechanism described in the present application.

[0125] For example, the first guide element 115, the first motor 112, the second guide element 117, and the second motor 113 are fixed to the cylinder head of the engine. The first guide element 115, the first motor 112, the second guide element 117, and the second motor 113 can also play a role in bearing the weight of the first rocker arm 101, the second rocker arm 102, the third rocker arm 103, the fourth rocker arm 104, the first rack 114, and the second rack 116. The engine can continuously adjust the valve lift to adapt to different working conditions of the engine.

[0126] According to another embodiment of the present application, a power device is provided, which includes the above-mentioned engine.

[0127] The power equipment may be, but is not limited to, vehicles, aircraft, ships, etc.

[0128] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0129] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A valve lift adjustment device, characterized in that: include: a first rocker arm assembly, the first rocker arm assembly being adapted to abut against a drive mechanism; a second rocker arm assembly, the second rocker arm assembly being adapted to abut against the valve assembly, the first rocker arm assembly and the second rocker arm assembly being rotatably connected, and the first rocker arm assembly and the second rocker arm assembly forming an included angle; and An adjusting mechanism, wherein the adjusting mechanism is respectively connected to the first rocker arm assembly and the second rocker arm assembly, and the adjusting mechanism is suitable for adjusting the position and / or angle of the first rocker arm assembly and the second rocker arm assembly to adjust the valve lift.

2. The valve lift adjustment device according to claim 1, characterized in that: The first rocker arm assembly comprises a first rocker arm (101) and a third rocker arm (103); the second rocker arm assembly comprises a second rocker arm (102) and a fourth rocker arm (104); the first rocker arm (101) is rotationally connected to the second rocker arm (102); the third rocker arm (103) is rotationally connected to the fourth rocker arm (104); the third rocker arm (103) is rotationally connected to the first rocker arm (101); the second rocker arm (102) is rotationally connected to the fourth rocker arm (104); the first rocker arm (101) is suitable for abutting against a driving mechanism; the second rocker arm (102) is suitable for abutting against a valve assembly.

3. The valve lift adjustment device according to claim 2, characterized in that: The first rocker arm (101) and the second rocker arm (102) are rotatably connected via a first rotating shaft (105), and the third rocker arm (103) and the fourth rocker arm (104) are rotatably connected via a second rotating shaft (106); The adjusting mechanism is suitable for being connected to the first rotating shaft (105) and / or the second rotating shaft (106), and the adjusting mechanism is suitable for adjusting the position of the first rotating shaft (105) and / or the second rotating shaft (106).

4. The valve lift adjustment device according to claim 3, characterized in that: The adjustment mechanism comprises a first moving component, and the first moving component is suitable for being rotationally connected to the first rotating shaft (105).

5. The valve lift adjustment device according to claim 4, characterized in that: The first moving assembly comprises a first power element and a first rack (114), the first power element is meshed with the first rack (114), and the first rack (114) is rotationally connected to the first rotating shaft (105).

6. The valve lift adjustment device according to claim 5, characterized in that: It also includes a first guide element (115), the first guide element (115) having two openings arranged opposite to each other and a first slide groove (1153) located on the side, the first rocker arm (101) and the second rocker arm (102) respectively extend from the two openings, and the first rotating shaft (105) is slidably arranged in the first slide groove (1153).

7. The valve lift adjustment device according to claim 6, characterized in that: The extension direction of the first sliding groove (1153) is parallel to the axial direction of the first rack (114).

8. The valve lift adjustment device according to claim 6, characterized in that: The first guide element (115) is also provided with a first through hole (1154), and the first rack (114) is passed through the first through hole (1154).

9. The valve lift adjustment device according to claim 8, characterized in that: A limiting groove (1155) is provided on the hole wall of the first through hole (1154), and the rack is slidably arranged in the limiting groove (1155).

10. The valve lift adjustment device according to any one of claims 3 to 9, characterized in that: The adjustment mechanism comprises a second moving component, and the second moving component is suitable for being rotationally connected to the second rotating shaft (106).

11. The valve lift adjustment device according to claim 10, characterized in that: The second moving assembly comprises a second power element and a second rack (116), the second power element is meshed with the second rack (116), and the second rack (116) is rotationally connected to the second rotating shaft (106).

12. The valve lift adjustment device according to claim 11, characterized in that: The second rack (116) comprises a rack body (1161) and a guide portion (1162), wherein the guide portion (1162) is connected to one end of the rack body (1161), the guide portion (1162) is provided with a guide groove (1163), and the second rotating shaft (106) is arranged in the guide groove (1163).

13. The valve lift adjustment device according to claim 12, characterized in that: The guide groove (1163) is an arc-shaped groove with its inner arc facing the first rotating shaft (105).

14. The valve lift adjustment device according to claim 12, characterized in that: It also includes a second guide element (117), which is provided with a second slide groove (1171); the second rack (116) also includes a slider (1164), which is connected to the rack body (1161) and / or the guide portion (1162), and the slider (1164) is slidably arranged in the second slide groove (1171).

15. The valve lift adjustment device according to claim 14, characterized in that: The extension direction of the second sliding groove (1171) is parallel to the axial direction of the rack body (1161).

16. The valve lift adjustment device according to claim 12, characterized in that: The second rack (116) includes a connecting portion (1165), the rack body (1161) and the guide portion (1162) are both in number, the two rack bodies (1161) are arranged side by side, and the connecting portion (1165) is respectively connected to one end of the two rack bodies (1161) that is away from the guide portion (1162).

17. The valve lift adjustment device according to any one of claims 2 to 16, characterized in that: The opening direction of the angle between the first rocker arm (101) and the second rocker arm (102) is the same as or opposite to the opening direction of the angle between the third rocker arm (103) and the fourth rocker arm (104).

18. An engine, characterized in that: Comprising the valve lift adjustment mechanism as claimed in any one of claims 1 to 17.

19. A power device, characterized in that: Comprising an engine as claimed in claim 18.

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