Valve control assembly

Abstract

The utility model relates to a kind of valve control assemblies, comprising: rocker, its one end in extension direction is provided with receiving part;And piston mechanism, including hydraulic cylinder body and the plunger that can reciprocate along axial direction relative to the hydraulic cylinder body;The inside of the plunger has oil storage chamber;The lateral wall of the plunger is provided with the oil inlet that is communicated with the oil storage chamber.Wherein, the axial direction of the plunger is set at angle with gravity direction, the axial end of the plunger away from the hydraulic cylinder body is peripherally limited and set in the receiving part;The oil inlet is set at the lateral wall of the plunger upside down.The valve control assembly of the utility model can when plunger is inclined to set, its inside oil storage chamber still can have larger oil storage space, and production cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of engine valve control technology. Specifically, this utility model relates to a valve control component. Background Technology

[0002] The valve control assembly is a crucial component of the engine's valve train, typically comprising a rocker arm and a piston mechanism that rests against the receiving portion of the rocker arm. The piston mechanism includes a hydraulic cylinder and a plunger. A high-pressure chamber is formed between the hydraulic cylinder and the plunger, and a check valve is installed within this chamber to control oil supply. An oil reservoir is located inside the plunger, and an oil inlet is located on the plunger's sidewall. The piston mechanism in the valve control assembly is usually mounted at a certain angle within the engine. In some applications, particularly in V- or W-type engines, this angle is even greater.

[0003] Because current valve control assemblies only have an axial locking mechanism relative to the rocker arm, lacking circumferential restraint, the oil inlet port can easily rotate circumferentially and slip to the lower side. This causes hydraulic oil in the reservoir to flow more easily out of the inlet port on the plunger sidewall, significantly reducing the oil output from the reservoir. When the hydraulic oil level in the reservoir approaches the check valve, this may result in insufficient hydraulic oil supply to the high-pressure chamber, and air may be drawn into the high-pressure chamber, causing the piston mechanism to soften, generating noise, and even leading to engine valve malfunction.

[0004] The current solution is to install a sleeve in the plunger's reservoir chamber, preventing the hydraulic oil from flowing directly out of the inlet. However, this significantly reduces the reservoir's capacity and increases production costs.

[0005] Therefore, there is an urgent need for a valve control component that can solve the above problems at a lower cost. Utility Model Content

[0006] To solve the above technical problems, this utility model provides a valve control component.

[0007] An embodiment of this utility model provides a valve control assembly, including: a rocker arm with a receiving portion at one end in its extending direction; and a piston mechanism including a hydraulic cylinder and a plunger that can reciprocate axially relative to the hydraulic cylinder; the plunger has an oil reservoir chamber inside; and an oil inlet communicating with the oil reservoir chamber is provided on the side wall of the plunger. The axial direction of the plunger is angled to the direction of gravity, and the axial end of the plunger away from the hydraulic cylinder is circumferentially limited in the receiving portion; the oil inlet is located on the upward-facing side wall of the plunger.

[0008] According to some optional embodiments of the present invention, a limiting groove is provided in the receiving part. The piston mechanism further includes: a snap-fit ​​member, which is axially protruding from the axial end side of the plunger facing the receiving part; and the protruding portion of the snap-fit ​​member is disposed in the limiting groove to form a circumferential limiting.

[0009] According to some optional embodiments of the present invention, the snap-fit ​​component is in the shape of a rectangular block, and the limiting groove is formed as a rectangular groove corresponding to the axial protrusion shape of the snap-fit ​​component.

[0010] According to some optional embodiments of the present invention, the plunger is provided with an axially penetrating pressure relief hole at one axial end away from the hydraulic cylinder body, a part of the snap-fit ​​member is disposed in the pressure relief hole, and the other part protrudes axially from the end face of the plunger.

[0011] According to some optional embodiments of this utility model, the pressure relief hole includes a through hole with a circular cross-section and a rectangular snap-fit ​​groove adjacent to the through hole. The through hole and the rectangular snap-fit ​​groove have a supporting plane formed on the side away from the end opening. In a direction perpendicular to the axial direction, a portion of the snap-fit ​​member is disposed within the through hole, and another portion is snap-fitted within the rectangular snap-fit ​​groove; the bottom surface of the snap-fit ​​member is supported on the supporting plane.

[0012] According to some optional embodiments of the present invention, the snap-fit ​​member has a cross-section in the direction perpendicular to the axial direction that is in the shape of a straight line, and the limiting groove is formed as a straight groove corresponding to the axial protrusion shape of the snap-fit ​​member.

[0013] According to some optional embodiments of the present invention, the oil inlet is disposed on the axial section of the side wall of the plunger near the receiving portion.

[0014] According to some optional embodiments of the present invention, the angle between the axial direction of the piston mechanism and the direction of gravity is 30 degrees to 70 degrees.

[0015] In the valve control assembly of this utility model, the piston mechanism is circumferentially limited relative to the rocker arm. Specifically, a snap-fit ​​component is provided between the end of the plunger and the receiving part, so that the oil inlet on the side wall of the plunger can be fixed in an upward position. When the piston mechanism is tilted, the oil storage chamber inside the plunger can still have a large oil storage space, and the production cost is low. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A partial cross-sectional view of a valve control assembly according to an embodiment of the present invention is shown;

[0018] Figure 2 A partial cross-sectional view of a valve control assembly according to an embodiment of the present invention in an inclined state is shown;

[0019] Figure 3 A partial perspective view of the receiving section according to an embodiment of the present invention is shown;

[0020] Figure 4 A perspective view of a pressure relief hole according to an embodiment of the present invention is shown;

[0021] Figure 5 A partial cross-sectional view of a valve control assembly according to an embodiment of the present invention is shown; and

[0022] Figure 6 A partial cross-sectional view of a valve control assembly according to an embodiment of the present invention is shown. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0024] In a vehicle engine, the valve control assembly is an important component of the engine's valve train, and its function is to achieve precise control of the valve opening and closing timing and lift through hydraulic drive.

[0025] Figure 1 A partial cross-sectional view of a valve control assembly according to an embodiment of the present invention is shown, wherein... Figure 1 Only a portion of rocker arm 100 is shown. See below. Figure 1 This section introduces the working principle of the valve control assembly.

[0026] The valve control assembly includes a rocker arm 100, a piston mechanism 200, and a clamping member 300 for connecting the rocker arm 100 and the piston mechanism 200 together. Since the clamping member 300 typically provides a clamping force in the axial direction of the piston mechanism without limiting the circumferential rotation of the piston mechanism 200 relative to the rocker arm 100, this invention provides a valve control assembly capable of circumferentially fixing the piston mechanism 200 relative to the rocker arm 100.

[0027] The rocker arm 100 has a receiving part 101 at one end in the extending direction. The receiving part 101 is generally hemispherical with a receiving space, which is used to place one axial end of the piston mechanism 200 therein.

[0028] The piston mechanism 200 includes a hydraulic cylinder body 1, a plunger 2, and a check valve assembly 3. The hydraulic cylinder body 1 is generally cylindrical, with an internal receiving chamber and an axial opening at one end. The plunger 2 has an oil reservoir C1; the plunger 2 can reciprocate axially within the receiving chamber; the portion of the receiving chamber located between the hydraulic cylinder body 1 and the plunger 2 forms a high-pressure chamber C2; the end of the plunger 2 facing the high-pressure chamber C2 has a high-pressure oil supply port communicating with the oil reservoir C1 and the high-pressure chamber C2. The check valve assembly 3 is disposed within the high-pressure chamber C2 and is used to control the closing and opening of the high-pressure oil supply port.

[0029] Specifically, see Figure 1 As shown, in some embodiments, the plunger 2 may include an upper plunger 21 and a lower plunger 22; both the upper plunger 21 and the lower plunger 22 have hollow cavities and are axially interconnected to form an oil reservoir C1. The upper plunger 21 is axially positioned on the side away from the end of the hydraulic cylinder 1, and the axial end of the upper plunger 21 away from the lower plunger 22 is located within the receiving space of the receiving portion 101. The lower plunger 22 is axially positioned on the side near the end of the hydraulic cylinder 1. An oil inlet 211 is provided on the side wall of the upper plunger 21 for supplying oil to the oil reservoir C1.

[0030] During operation, when the plunger 2 is pressed into the receiving chamber inside the hydraulic cylinder 1, the check valve assembly 3 is in the closed state, and the high-pressure chamber C2 is in a high-pressure state due to the compression of its internal space. Some hydraulic oil will be forced into the tiny gap between the plunger 2 and the hydraulic cylinder 1.

[0031] During operation, when the plunger 2 moves in the direction of pulling out the hydraulic cylinder 1, the high-pressure chamber C2 is under negative pressure due to the increase in its internal space. At this time, the pressure in the oil reservoir C1 is higher than the pressure in the high-pressure chamber C2, which is under negative pressure, so the oil reservoir C1 can replenish oil to the high-pressure chamber C2.

[0032] Figure 2A partial cross-sectional view of a valve control assembly according to an embodiment of the present invention in an inclined state is shown. In some embodiments, such as Figure 2 As shown, the piston mechanism 200 in the valve control assembly is typically mounted in the engine at a certain tilt angle. In some applications, especially in V- or W-type engines, the tilt angle of the piston mechanism 200 is even greater. The angle between the axial direction of the piston mechanism and the direction of gravity can be set between 30 and 70 degrees.

[0033] It is understandable that when the piston mechanism 200 is in an inclined state, the amount of oil stored in the oil reservoir C1 of the plunger 2 will decrease. For example... Figure 2 As shown, the hydraulic oil level in the reservoir C1 can only reach the inlet 211. If the plunger 2 rotates circumferentially relative to the rocker arm 1, the inlet 211 is not always at the top, which will further reduce the amount of oil in the reservoir C1. Therefore, this invention provides a valve control assembly that can ensure that the piston mechanism 200, specifically the plunger 2, and more specifically the upper plunger 21, is circumferentially limited relative to the rocker arm 1, so that the inlet 211 is kept at the top of the plunger 2, thereby maximizing the amount of oil in the reservoir C1.

[0034] Combination Figure 1 and Figure 2 As shown, in some embodiments, the valve control assembly includes: a rocker arm 100, which has a receiving portion 101 at one end in the extending direction; and a piston mechanism 200, including a hydraulic cylinder 1 and a plunger 2 that can reciprocate axially relative to the hydraulic cylinder 1; the plunger 2 has an oil reservoir C1 inside; and an oil inlet 211 communicating with the oil reservoir C1 is provided on the side wall of the plunger 2. The axial direction of the plunger 2 is angled to the direction of gravity, and the axial end of the plunger 2 away from the hydraulic cylinder 1 is circumferentially limited in the receiving portion 101; the oil inlet 211 is located on the upward-facing side wall of the plunger 2.

[0035] In the valve control assembly of this utility model, the piston mechanism 200 is circumferentially limited relative to the rocker arm 100, so that the oil inlet 211 on the side wall of the plunger 2 can be fixed in an upward position. When the piston mechanism 200 is set, its internal oil storage chamber C1 can still have a large oil storage space, and the production cost is low.

[0036] Figure 3 A partial perspective view of the receiving section according to an embodiment of the present invention is shown. (In conjunction with...) Figures 1 to 3 As shown, a limiting groove 101a is provided in the receiving part 101. In addition, the piston mechanism 200 also includes: a snap-fit ​​member 4, which is axially protrudingly provided on the axial end side of the plunger 2 facing the receiving part 101; and the protruding portion of the snap-fit ​​member 4 is provided in the limiting groove 101a to form a circumferential limit.

[0037] It is understood that the snap-fit ​​4 can snap-fit ​​and limit the receiving part 101 and the plunger 2 in the circumferential direction, so that the plunger 2 can be circumferentially limited relative to the receiving part 101, while fixing the oil inlet 211 in the upward position.

[0038] Furthermore, the snap-fit ​​member 4 can be in various shapes that can snap-fit ​​and limit in the circumferential direction, that is, the shape can form a limiting support with the mating part of the receiving part 101 and the plunger 2 in the tangential direction.

[0039] Specifically, in some embodiments, such as Figures 1 to 3 As shown, the snap-fit ​​component 4 can be rectangular in shape, and the limiting groove 101a is formed as a rectangular groove corresponding to the axial protrusion of the snap-fit ​​component 4. When a portion of the snap-fit ​​component 4 is disposed in the limiting groove 101a, the snap-fit ​​component 4 cannot rotate circumferentially relative to the receiving part 101. It should be understood that the term "rectangular" is not limited to a rectangle in the strict sense, but can be generally rectangular in shape with slight deformation, serving only to provide circumferential limiting.

[0040] Accordingly, the axial end of the plunger 2 away from the hydraulic cylinder body 1 is provided with an axially penetrating pressure relief hole 212. A portion of the snap-fit ​​member 4 is disposed within the pressure relief hole 212, and the snap-fit ​​member 4 cannot be positioned relative to the plunger 2 (or Figure 1 and Figure 2 The upper plunger 21 rotates circumferentially; another part protrudes axially from the end face of the plunger 2 and is disposed in the limiting groove 101a.

[0041] Through the above design, the snap-fit ​​part 4 can respectively limit and snap-fit ​​the receiving part 101 and the plunger 2, thereby limiting the plunger 2 circumferentially relative to the rocker arm 100 to keep the oil inlet 211 fixed in the upward position.

[0042] The pressure relief hole 212 is a structure in the plunger 2 located at the axial end for releasing the pressure in the oil reservoir C1. Through the above embodiment, the pressure relief hole 212 structure can be used to form a circumferential constraint between the snap-fit ​​part 4 and the plunger 2, avoiding the need to set a separate limiting groove. Therefore, it can simplify the processing technology and make the structure of the valve control assembly more compact.

[0043] Of course, in order to enable the structure of the pressure relief hole 212 to circumferentially limit the snap-fit ​​part 4, the specific structure of the pressure relief hole 212 will be further described below.

[0044] Figure 4 A perspective view of a pressure relief hole according to an embodiment of the present invention is shown; Figure 5 A partial cross-sectional view of a valve control assembly according to an embodiment of the present invention is shown; and Figure 6 A partial cross-sectional view of a valve control assembly according to an embodiment of the present invention is shown. Wherein, Figure 5 and Figure 6 A cross-sectional view taken from mutually perpendicular perspectives.

[0045] Combination Figures 4 to 6 As shown, the pressure relief hole 212 includes a through hole portion 212a with a circular cross-section and a rectangular snap-fit ​​groove 212b adjacent to the through hole portion 212a. The through hole portion 212a and the rectangular snap-fit ​​groove 212b have a support plane 212c formed on the side away from the end opening. In the direction perpendicular to the axial direction, a part of the snap-fit ​​member 4 is disposed in the through hole portion 212a, and another part is snap-fitted in the rectangular snap-fit ​​groove 212b; the bottom surface of the snap-fit ​​member 4 is supported on the support plane 212c.

[0046] With the above design, the snap-fit ​​part 4 can utilize the through hole 212a of the pressure relief hole 212 and be circumferentially limited by the rectangular snap-fit ​​groove 212b. Therefore, it is not necessary to specially set a limiting groove at the end of the plunger 2 to accommodate the snap-fit ​​part 4, which simplifies the manufacturing process and makes the structure of the valve control assembly more compact.

[0047] In some embodiments, the snap-fit ​​member 4 has a straight cross-section perpendicular to the axial direction, and the limiting groove 101a is formed as a straight groove corresponding to the axially protruding shape of the snap-fit ​​member 4.

[0048] Furthermore, the snap-fit ​​component 4 can be designed in other shapes, such as a cross-shaped or polygonal star-shaped cross-section, as long as it can form a circumferential limiting relationship with the receiving part 101 and the plunger 2. Correspondingly, the limiting groove 101a is also designed as a groove with a shape corresponding to the cross-sectional shape of the snap-fit ​​component 4.

[0049] In some embodiments, the oil inlet 211 is located on the side wall of the plunger 2, axially close to the receiving portion 101. It can be understood that the closer the oil inlet 211 is axially to the receiving portion 101, i.e., the higher the receiving portion 101 is located, the greater the oil storage capacity of the oil storage chamber C1 in the plunger 2.

[0050] In the valve control assembly of this utility model, the piston mechanism 200 is circumferentially limited relative to the rocker arm 100. Specifically, a snap-fit ​​member 4 is provided between the end of the plunger 2 and the receiving part 101, so that the oil inlet 211 on the side wall of the plunger 2 can be fixed in an upward position. When the piston mechanism 200 is tilted, the oil storage chamber C1 inside the plunger 2 can still have a large oil storage space, and the production cost is low.

[0051] While possible embodiments have been described exemplarily in the foregoing description, it should be understood that numerous variations of the embodiments exist through combinations of all known and readily conceived technical features and implementation methods. Furthermore, it should be understood that the exemplary embodiments are merely examples and do not in any way limit the scope, application, or construction of this invention. The foregoing description is more intended to provide those skilled in the art with technical guidance for transforming at least one exemplary embodiment, wherein various changes, particularly regarding the function and structure of the components, can be made without departing from the scope of the claims.

Claims

1. A valve control assembly, characterized in that, include: A rocker arm (100) has a receiving part (101) at one end in the extending direction; as well as The piston mechanism (200) includes a hydraulic cylinder (1) and a plunger (2) that can reciprocate axially relative to the hydraulic cylinder (1); the plunger (2) has an oil reservoir (C1) inside; the side wall of the plunger (2) is provided with an oil inlet (211) communicating with the oil reservoir (C1); The axial direction of the plunger (2) is set at an angle to the direction of gravity, and the axial end of the plunger (2) away from the hydraulic cylinder (1) is circumferentially limited in the receiving part (101); the oil inlet (211) is located on the upward side wall of the plunger (2).

2. The valve control assembly according to claim 1, characterized in that, A limiting groove (101a) is provided inside the receiving part (101); The piston mechanism (200) further includes: a snap-fit ​​member (4) which is axially protruding from the plunger (2) on the axial end side facing the receiving part (101); and the protruding portion of the snap-fit ​​member (4) is disposed in the limiting groove (101a) to form a circumferential limit.

3. The valve control assembly according to claim 2, characterized in that, The snap-fit ​​member (4) is rectangular in shape, and the limiting groove (101a) is formed as a rectangular groove corresponding to the axial protrusion of the snap-fit ​​member (4).

4. The valve control assembly according to claim 3, characterized in that, The plunger (2) has an axially penetrating pressure relief hole (212) at one axial end away from the hydraulic cylinder (1). A part of the snap-fit ​​member (4) is disposed in the pressure relief hole (212), and the other part protrudes axially from the end face of the plunger (2).

5. The valve control assembly according to claim 4, characterized in that, The pressure relief hole (212) includes a through hole (212a) with a circular cross-section and a rectangular snap-fit ​​groove (212b) adjacent to the through hole (212a). The through hole (212a) and the rectangular snap-fit ​​groove (212b) have a support plane (212c) on the side away from the end opening. In a direction perpendicular to the axial direction, a portion of the snap-fit ​​member (4) is disposed in the through hole (212a), and another portion is snap-fitted in the rectangular snap-fit ​​groove (212b); the bottom surface of the snap-fit ​​member (4) is supported on the support plane (212c).

6. The valve control assembly according to claim 2, characterized in that, The snap-fit ​​member (4) has a straight cross-section perpendicular to the axial direction, and the limiting groove (101a) is formed as a straight groove corresponding to the axial protrusion of the snap-fit ​​member (4).

7. The valve control assembly according to claim 1, characterized in that, The oil inlet (211) is located on the axial section of the side wall of the plunger (2) near the receiving part (101).

8. The valve control assembly according to claim 1, characterized in that, The angle between the axial direction of the piston mechanism (200) and the direction of gravity is 30 to 70 degrees.

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