Valve rocker arm assembly

Abstract

The present application relates to a valve rocker arm assembly. The valve rocker arm assembly includes an outer rocker arm, an inner rocker arm and two outer rollers, the inner rocker arm and the two outer rollers are rotatably mounted on the outer rocker arm with mutually parallel rotation axes, the inner rocker arm is located between the two outer rollers, and the outer rollers are used to receive external driving force, wherein the outer rocker arm has two raceway portions for mounting the outer rollers, the raceway portions have circumferentially extending outer peripheral surfaces, each outer roller is rotatably supported on the outer peripheral surface of the corresponding raceway portion, the raceway portions have main raceway portions and narrowed raceway portions, the axial length of the main raceway portions is greater than the axial length of the narrowed raceway portions, and the sections of the outer rollers subjected to external driving force are supported on the main raceway portions. The valve rocker arm assembly of the present application can reduce the weight of the assembly structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines. In particular, the present application relates to a valve rocker arm assembly for a valve train of an engine. BACKGROUND

[0002] Valve train is one of the important components in the engine system of a vehicle. Generally, a valve rocker arm device is provided in the valve train to convert the rotational motion of a cam into the linear motion of a valve push rod. The valve rocker arm device cooperates with the cam mechanism to control the timely opening or closing of the valve through its swing, so as to realize the intake and exhaust of the engine cylinder. Among them, the switchable valve rocker arm (SRFF) is generally provided with two rocker arm mechanisms pivotally connected with each other. By controlling the connection state between the two rocker arm mechanisms, the engagement state of the cam and the valve rocker arm device can be changed, so that the valve lift can be switched between high and low lifts or the valve can be twice opened.

[0003] In the prior art, for example, the switchable valve rocker arm disclosed in CN 102892977 A typically divides the two rocker arms into an inner rocker arm and an outer rocker arm, wherein the inner rocker arm is rotatably installed between the two side plates of the outer rocker arm. A roller assembly is fitted on the inner rocker arm for rolling contact with the cam driving the valve rocker arm, thereby reducing the friction therebetween. A friction pad is provided on each of the two side plates of the outer rocker arm for sliding contact with the cam. In this design, the friction loss between the outer rocker arm and the cam is large, which is easy to cause wear and thus affect the service life.

[0004] In order to further reduce the friction on the outer rocker arm, some switchable valve rocker arms also install roller assemblies for engaging the cam on both sides of the outer rocker arm. In these valve rocker arms, there are generally two ways to install the rollers: one is the valve rocker arm in CN 104395564 A, which forms a cavity in the roller rotating shaft of the inner rocker arm, and uses a rotating shaft passing through the cavity to support the rollers on both sides of the outer rocker arm. Therefore, the relative rotation range between the inner rocker arm and the outer rocker arm is limited by the size of the cavity; the other is the valve rocker arm in CN 109923286 A, which forms cantilevered support shafts on both sides of the outer rocker arm, and uses threaded fasteners to axially limit the rollers, but the cost of machining threads is high, and the weight of the fasteners is large. If the cantilevered roller rotating shaft design is adopted, a method to reduce the structural weight and simplify the machining method needs to be found. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is to provide a valve rocker arm assembly with a lighter structural weight.

[0006] The above technical problem is solved by a valve rocker arm assembly according to the present application. The valve rocker arm assembly comprises an outer rocker arm, an inner rocker arm and two outer rollers, the inner rocker arm and the two outer rollers are rotatably mounted on the outer rocker arm with mutually parallel rotation axes, and the inner rocker arm is located between the two outer rollers. The outer rollers are used to receive an external driving force, which is applied on the outer rollers by a driving mechanism (such as a cam or the like) in abutment with the outer rollers. The outer rocker arm has two raceway portions for mounting the outer rollers, the raceway portions have circumferentially extending outer peripheral surfaces, and each outer roller is rotatably supported on the outer peripheral surface of the corresponding raceway portion. The raceway portions have a main raceway portion and a narrowed raceway portion, the axial length of the main raceway portion is greater than the axial length of the narrowed raceway portion, and the section of the outer roller subjected to the external driving force is supported on the main raceway portion.

[0007] Here, "axial", "radial" and "circumferential" are all directions with respect to the raceway portion, so the axial direction of the raceway portion is also the extension direction of the rotation axis of the outer roller rotating on the outer peripheral surface of the raceway portion. Since the outer roller is only subjected to the driving force on one side facing the driving mechanism, the raceway portion only needs to have a larger axial length on the side facing the driving mechanism to support the outer roller, which is the main raceway portion. The axial length of the main raceway portion, in particular the axial length of the outer peripheral surface, is preferably equal to or slightly greater than the axial length of the outer roller, so as to provide stable support for the outer roller subjected to the driving force. The outer roller will not be subjected to the driving force on the side of the raceway portion facing away from the driving mechanism, so the raceway portion can have a smaller axial length in the region of this part, which is the narrowed raceway portion. The axial length of the narrowed raceway portion, in particular the axial length of the outer peripheral surface, can be preferably one third to one half of the axial length of the main raceway portion, and thus also less than the axial length of the outer roller. Although the outer peripheral surface of the narrowed raceway portion has a smaller axial length, it is sufficient to support and guide the rotational movement of the outer roller, while greatly reducing the structural weight of the valve rocker arm assembly, thereby reducing the moment of inertia of the valve rocker arm assembly.

[0008] According to a preferred embodiment of the present application, the outer rocker arm can have two side plates extending in parallel and connected to each other at the end portions, the inner rocker arm is located between the two side plates, the main raceway portion protrudes axially from the side of the side plate facing away from the inner rocker arm, and the narrowed raceway portion is connected with the axial middle portion, in particular the axial midpoint, of the main raceway portion and spaced apart from the side plate. Since the axial length of the main raceway portion is approximately equal to the axial length of the outer roller, and the axial length of the narrowed raceway portion is less than the axial length of the outer roller, the narrowed raceway portion located in the axial middle portion of the main raceway portion is also correspondingly supported near the axial middle portion of the outer roller, thereby facilitating stable support of the outer roller.

[0009] According to another preferred embodiment of the present application, the rocker arm assembly can further comprise a retaining cap, the outer rocker arm can further have a receptacle formed on the radially inner side of the raceway portion, and the retaining cap can have a baffle portion and a quick connector, the quick connector being inserted into the receptacle when the retaining cap is mounted on the outer rocker arm so as to define the axial position of the retaining cap relative to the outer rocker arm by means of a form fit, and the baffle portion being located outside the end portion of the raceway portion so as to define the axial position of the outer roller relative to the raceway portion. Preferably, the quick connector can be inserted into the receptacle by means of elastic deformation and can be restored after being fully inserted into the receptacle so as to define the axial position of the retaining cap relative to the outer rocker arm by means of the form fit with the receptacle. The retaining cap can be made of a lightweight material with elastic deformation capability, such as plastic or the like, or can be made of a metal material with higher strength. Such a retaining cap is convenient to disassemble and can further reduce the structural weight of the rocker arm assembly.

[0010] According to another preferred embodiment of the present application, the receptacle can be a through hole formed on the narrowed raceway portion, and the quick connector can pass through the receptacle in the axial direction when the retaining cap is mounted on the outer rocker arm. Such a structure is more convenient to disassemble the retaining cap.

[0011] According to another preferred embodiment of the present application, the baffle portion can extend to the radially outer side beyond the outer peripheral surface of at least part of the main raceway portion so as to be able to cooperate with the side plate to limit the axial position of the outer roller. Preferably, the baffle portion can not extend to the radially outer side beyond the outer peripheral surface of the narrowed raceway portion. This is because the section of the outer roller on the narrowed raceway portion is not directly pressed by the driving mechanism, and thus it is feasible not to limit the axial position in this area, which further reduces the structural weight of the retaining cap.

[0012] According to another preferred embodiment of the present application, the main raceway portion can be an arc-shaped structure extending partially in the circumferential direction and having a circular-arc-shaped inner peripheral surface, and the retaining cap can have a connecting portion connected between the baffle portion and the quick connector, the inner peripheral surface of the main raceway portion abutting against the connecting portion when the retaining cap is mounted on the outer rocker arm, so as to make the retaining cap more stably mounted on the raceway portion.

[0013] According to another preferred embodiment of the present application, the raceway portion can further have a reinforcing rib extending radially from the inner peripheral surface of the main raceway portion and connected to the narrowed raceway portion, and correspondingly, the retaining cap can have a limiting groove extending radially on the connecting portion, the reinforcing rib being inserted into the limiting groove when the retaining cap is mounted on the outer rocker arm, so as to prevent the retaining cap from rotating relative to the raceway portion.

[0014] According to another preferred embodiment of the present application, the receptacle can be arranged eccentrically to the axis of the inner peripheral surface of the main raceway portion, which can also prevent the retaining cap from rotating relative to the raceway portion. BRIEF DESCRIPTION OF DRAWINGS

[0015] The application is further described below with reference to the drawings. In the drawings, like elements are referred to with the same reference numerals. In which:

[0016] Figure 1 shows a perspective view of a valve rocker arm assembly according to an embodiment of the application;

[0017] Figure 2a and Figure 2b shows a front view and a perspective view of an outer rocker arm of the valve rocker arm assembly in Figure 1

[0018] Figure 3 shows a cross-sectional view of the valve rocker arm assembly in Figure 1

[0019] Figure 4 shows a schematic view of a retaining cap of the valve rocker arm assembly in Figure 1

[0020] Figure 5 shows a schematic view of a retaining cap of a valve rocker arm assembly according to another embodiment of the application;

[0021] Figure 6 shows a perspective view of a valve rocker arm assembly according to yet another embodiment of the application;

[0022] Figure 7a and Figure 7b shows different angle perspective views of an outer rocker arm of the valve rocker arm assembly in Figure 6

[0023] Figure 8 shows a cross-sectional view of the valve rocker arm assembly in Figure 6

[0024] Figure 9 shows a schematic view of a retaining cap of the valve rocker arm assembly in Figure 6 DETAILED DESCRIPTION A detailed description of a valve rocker arm assembly according to the application will be described below with reference to the drawings. The following detailed description and drawings are provided to illustrate the principles of the application and not to limit the preferred embodiments described to the preferred embodiments described. The scope of the application is defined by the claims.

[0025] According to an embodiment of the application, a valve rocker arm assembly for an engine valve train of a motor vehicle is provided, which is suitable for a valve train with variable valve lift.

[0026] One embodiment of a valve rocker arm assembly according to the application is shown. Figures 1 to 4

[0027] Figure 1 ​​​​​​A perspective view of a valve rocker arm assembly according to this embodiment is shown. As shown, the valve rocker arm assembly includes an outer rocker arm 10, an inner rocker arm 20, an outer roller 30, an inner roller 40, a return spring 50, and a mounting pin 60.

[0028] Figure 2a and Figure 2b The front view and perspective view of the outer rocker arm 10 are shown respectively. As shown, the outer rocker arm 10 has two parallel extending side plates 11. The two side plates 11 are spaced apart from each other in a direction perpendicular to their respective extending planes and are connected to each other at their respective ends.

[0029] like Figure 1 As shown, the inner rocker arm 20 is mounted between the two side plates 11 of the outer rocker arm 10. One end of the inner rocker arm 20 is rotatably mounted on the outer rocker arm 10 via a mounting pin 60, the central axis of which is perpendicular to the extending plane of the side plate 11, allowing the inner rocker arm 20 to rotate relative to the outer rocker arm 10 in a plane parallel to the two side plates 11. Two torsion springs 50 are respectively mounted on both sides of the end of the outer rocker arm 10. Each return spring 50 has two feet, one abutting against the outer rocker arm 10 and the other abutting against the inner rocker arm 20, allowing the outer rocker arm 10 and the inner rocker arm 20 to rotate relative to each other and return to their original positions when no driving force is applied. An inner roller 40 is rotatably mounted at the axial center of the inner rocker arm 20, and the axis of rotation of the inner roller 40 relative to the inner rocker arm 20 is parallel to the axis of rotation of the inner rocker arm 20 relative to the outer rocker arm 10.

[0030] like Figure 2a and Figure 2bAs shown, the outer rocker arm 10 also has two raceway portions 12. These two raceway portions 12 are formed on the two side plates 11, respectively, and have the same shape and size and are arranged symmetrically about the inner rocker arm 20. Each outer roller 30 is supported radially outside a corresponding raceway portion 12 and is rotatable about the raceway portion 12 (i.e., relative to the outer rocker arm 10), with its axis of rotation parallel to the axis of rotation of the inner rocker arm 20 and the inner roller 40. Each raceway portion 12 has two parts: a main raceway portion 13 and a narrowing raceway portion 14. The main raceway portion 13 extends from the side of the side plate 11 away from the inner rocker arm 20 along the direction of the axis of rotation of the outer roller 30 (hereinafter referred to as the axial direction), thereby forming a protruding structure on the outer side of the side plate 11. The main raceway portion 13 may have a flat end face that extends substantially parallel to the side plate 11. The narrowing raceway portion 14 is generally a flat plate structure of uniform thickness that extends perpendicular to the axial direction. The axial length of the main raceway portion 13 is slightly greater than the axial length of the outer roller 30, while the axial length of the narrowing raceway portion 14 is less than the axial length of the main raceway portion 13, preferably one-third to one-half of the axial length of the main raceway portion 13, and the narrowing raceway portion 14 is connected to the axial middle part of the main raceway portion 13, especially at the axial midpoint, thereby being spaced parallel to the side plate 11.

[0031] like Figure 2a As shown, viewed axially, the raceway portion 12 has an outer peripheral surface that extends circumferentially around the rotation axis of the outer roller 30, a portion of which is located on the outer side of the main raceway portion 13, and another portion on the outer side of the narrowing raceway portion 14. The main raceway portion 13 also has an inner peripheral surface that extends radially inward on the outer peripheral surface, such that the main raceway portion 13 is arc-shaped in a cross-section perpendicular to the axial direction. In this embodiment, the central angle corresponding to the outer peripheral surface formed on the main raceway portion 13 is approximately 180 degrees, i.e., a semicircle. Correspondingly, the inner peripheral surface of the main raceway portion 13 and the outer peripheral surface formed on the narrowing raceway portion 14 also correspond to a central angle of 180 degrees.

[0032] The narrowing raceway portion 14 is connected to the main raceway portion 13 on its entire inner circumferential surface and both end faces. An axially penetrating insertion hole 15 is formed in the narrowing raceway portion 14. Viewed in a plane perpendicular to the axial direction, the insertion hole 15 is eccentrically arranged with respect to the axis of rotation of the outer roller 30, particularly with respect to the axis of rotation of the inner circumferential surface of the main raceway portion 13. The raceway portion 12 also has a reinforcing rib 16. The reinforcing rib 16 extends radially inward from the inner circumferential surface of the main raceway portion 13 and connects to one side of the narrowing raceway portion 14 opposite to the inner rocker arm 20.

[0033] like Figure 1 and Figure 3As shown, the valve rocker arm assembly further comprises two retaining caps 70, each of which is mounted at an axial end of a corresponding race portion 12 so as to axially position the outer roller 30. The retaining caps 70 are preferably made of light-weight material such as plastic, or alternatively, made of metal material. Figure 4 The retaining caps 70 are shown in perspective views from different angles, respectively. As shown, each of the retaining caps 70 has a baffle portion 71, a quick connector 72 and a connecting portion 73. The baffle portion 71 is formed as a partially circular plate structure with uniform thickness. The connecting portion 73 protrudes axially at one side of the baffle portion 71 and has a generally circular cross-sectional shape. The quick connector 72 extends axially from a side of the connecting portion 73 facing away from the baffle portion 71. In the present embodiment, the quick connector 72 is composed of four connector petals uniformly spaced apart in the circumferential direction, each of which can be elastically bent radially to approach or move away from each other, so that the overall radius of the quick connector 72 can be changed by elastic deformation. In the absence of elastic deformation, the radius of the axial middle portion of the quick connector 72 corresponds to (is substantially equal to or slightly smaller than) the inner diameter of the insertion hole 15, while the radius of the free end of the quick connector 72 is larger than the inner diameter of the insertion hole 15.

[0034] When the retaining cap 70 is mounted on the corresponding race portion 12, the quick connector 72 is elastically deformed to pass through the insertion hole 15 and restored after being mounted in place, at which time the free end of the quick connector 72 protrudes outside the narrowed race portion 14 while the axial middle portion is engaged in the insertion hole 15, so that the retaining cap 70 is axially positioned relative to the outer rocker arm 10. At the same time, the baffle portion 71 abuts against the end face of the main race portion 13 in the axial direction and extends radially to the outside of the main race portion 13. The baffle portion 71 only has a partially circular shape, the portion missing relative to a complete circle corresponding to the narrowed race portion 14, so that the baffle portion 71 only extends to the radially outer side of the main race portion 13 (or a portion thereof) without extending to the radially outer side of the narrowed race portion 14. Preferably, the connecting portion 73 is complementary in profile to the main race portion 13, so that the outer peripheral surface of the connecting portion 73 fits the inner peripheral surface of the main race portion 13. At the same time, a limiting groove 74 extending radially from the radially outer side to the inner side is formed on the connecting portion 73, and the reinforcing rib 16 of the race portion 12 is inserted into the limiting groove 74 of the retaining cap 70, so that the retaining cap 70 cannot rotate relative to the race portion 12. In addition, since the axis of the insertion hole 15 is arranged eccentrically relative to the inner peripheral surface of the main race portion 13, the rotational movement of the retaining cap 70 relative to the race portion 12 is also limited.

[0035] When the two ring-shaped outer rollers 30 are mounted on the corresponding raceway portions 12, the outer rollers 30 can roll along the outer circumferential surface of the raceway portions 12 under the drive of a drive mechanism (not shown). The drive mechanism is usually a cam mechanism, the cam being arranged with a rotation axis parallel to the outer rollers 30 and being in rolling engagement with the outer rollers 30 on the side close to the main raceway portion 13. The main raceway portion 13 is directed towards the drive mechanism, so that when the cam abuts against the outer rollers 30, the section of the outer rollers 30 directly subjected to the pressure of the cam can be stably supported on the main raceway portion 13; the narrowed raceway portion 14 is directed away from the cam and is not subjected to a large pressure, so that although the narrowed raceway portion 14 only supports the axial middle region of the outer rollers 30, it is still sufficient to ensure that the outer rollers 30 roll stably along the outer circumferential surface of the raceway portions 12. When the outer rollers 30 rotate relative to the raceway portions 12, the side plates 11 and the baffle portion 71 of the retaining cover 70 axially limit the outer rollers 30 on both axial ends, respectively. The axial length between the side plates 11 and the baffle portion 71, i.e. the axial length of the main raceway portion 13, is slightly greater than the axial length of the outer rollers 30, so that the outer rollers can rotate smoothly and freely and do not significantly oscillate in the axial direction.

[0036] In the present embodiment, due to the narrowed design of the narrowed raceway portion 14 and the partial circular design of the baffle portion 71 of the retaining cover 70, the material usage of the structure for mounting the outer rollers 30 is greatly reduced, so that the structural weight can be reduced and the rotational inertia of the valve rocker arm assembly can be reduced. At the same time, the retaining cover 70 mounted using the quick connector is not only convenient to disassemble and assemble, but also can be made of a light material such as plastic, so that the structural weight is further reduced.

[0037] In another alternative embodiment, the baffle portion 71 of the retaining cover 70 can also be formed as a complete circle, as shown in Figure 5 In addition, the structure of the retaining cover 70 can also be changed in other ways, for example in the further alternative embodiment shown in Figures 6 to 9 The difference between this embodiment and the embodiment of Figures 1 to 4 is that no reinforcing ribs 16 are formed on the raceway portions 12, and the rotational limitation of the retaining cover 70 is only achieved by the eccentrically arranged quick connector 72. Here, the insertion hole 15 is not offset on the narrowed raceway portion 14 in the direction away from the main raceway portion 13 as in the foregoing embodiments, but is instead offset in the direction close to the main raceway portion 13. Therefore, the baffle portion 71 can be formed smaller, for example as a sector as shown in the figure.

[0038] It should be noted that the skilled person can make other adjustments to the specific construction of the above-described embodiments in accordance with the present application. For example, the central angle of the outer peripheral surface formed on the main raceway portion 13 can be changed, for example, to an angle other than 180 degrees, greater or less. However, in order to ensure stable support of the outer roller 30, it is generally preferable to use an angle greater than 180 degrees, since the contact angle of the cam with the outer roller 30 varies within a certain range. Also, the structure of the quick connector 72 is merely exemplary, and other structures of the quick connector can also be used. For example, the quick connector 72 can be formed of fewer or more connector petals, or can be formed as an integrated cylindrical structure and inserted into the insertion hole 15 only by the overall elastic contraction of the material itself, as long as it is convenient for mounting and positioning. Furthermore, the outer peripheral surface of the raceway portion 12 need not necessarily be a complete ring shape extending around the entire circumference, but can be a partial ring shape having a gap in the region of the narrowed raceway portion 14, and correspondingly, the narrowed raceway portion 14 can have a gap portion, for example, in the shape of a sector, so as to further reduce the weight. However, the area of such a gap portion should not be too large, but should be such that stable rotation of the outer roller 30 is ensured.

[0039] Although the possible embodiments have been described in the above description by way of example it is to be understood that there can be deviations therefrom without departing from the scope of the application. Furthermore, it is to be understood that the example embodiments are merely examples and that the embodiments in no way limit the scope of protection, the application and the construction of the present application. The foregoing description is intended more to provide technical guidance to the skilled person for the transformation of at least one example embodiment, in which various changes can be made without departing from the scope of protection of the claims, in particular with regard to the function and structure of the components.

[0040] List of reference signs

[0041] 10 outer rocker arm

[0042] 11 side plate

[0043] 12 raceway portion

[0044] 13 main raceway portion

[0045] 14 narrowed raceway portion

[0046] 15 insertion hole

[0047] 16 reinforcing rib

[0048] 20 inner rocker arm

[0049] 30 outer roller

[0050] 40 inner roller

[0051] 50 return spring

[0052] 60 mounting pin

[0053] 70 holding cover

[0054] 71 baffle portion

[0055] 72 quick connector

[0056] 73 connecting portion

[0057] 74 limiting groove

Claims

1. A valve rocker arm assembly, comprising an outer rocker arm (10), an inner rocker arm (20), and two outer rollers (30), wherein the inner rocker arm (20) and the two outer rollers (30) are rotatably mounted on the outer rocker arm (10) about mutually parallel axes of rotation, the inner rocker arm (20) being located between the two outer rollers (30), and the outer rollers (30) being used to receive external driving forces. Its features are, The outer rocker arm (10) has two raceway portions (12) for mounting the outer rollers (30). The raceway portions (12) have an outer peripheral surface extending circumferentially. Each outer roller (30) is rotatably supported on the outer peripheral surface of the corresponding raceway portion (12). The raceway portion (12) has a main raceway portion (13) and a narrowing raceway portion (14). The raceway portion (12) has an outer peripheral surface formed by extending a complete circumference around the rotation axis of the outer roller (30). A circumferential portion of the outer peripheral surface is located outside the main raceway portion (13), and another circumferential portion is located outside the narrowing raceway portion (14). The axial length of the main raceway portion (13) is greater than the axial length of the narrowing raceway portion (14). The section of the outer roller (30) subjected to external driving force is supported on the main raceway portion (13).

2. The valve rocker arm assembly according to claim 1, characterized in that, The outer rocker arm (10) has two parallel extending side plates (11), the inner rocker arm (20) is located between the two side plates (11), the main raceway portion (13) protrudes axially from the side of the side plate (11) facing away from the inner rocker arm (20), and the narrowing raceway portion (14) is connected to the axial center of the main raceway portion (13) and spaced apart from the side plate (11).

3. The valve rocker arm assembly according to claim 2, characterized in that, The valve rocker arm assembly also includes a retaining cap (70), and the outer rocker arm (10) also has a socket (15) formed on the radially inner side of the raceway portion (12). The retaining cap (70) has a baffle portion (71) and a quick-connect connector (72). When the retaining cap (70) is mounted on the outer rocker arm (10), the quick-connect connector (72) is inserted into the socket (15) to define the axial position of the retaining cap (70) relative to the outer rocker arm (10) by form fit, and the baffle portion (71) is located outside the end of the raceway portion (12) to define the axial position of the outer roller (30) relative to the raceway portion (12).

4. The valve rocker arm assembly according to claim 3, characterized in that, The quick-connector (72) can be inserted into the socket (15) by elastic deformation and can return to its original position after being fully inserted into the socket (15), thereby defining the axial position of the retaining cap (70) relative to the outer rocker arm (10) by matching the shape of the socket (15).

5. The valve rocker arm assembly according to claim 3, characterized in that, The insertion hole (15) is a through hole formed on the narrowing raceway portion (14), and when the retaining cap (70) is mounted on the outer rocker arm (10), the quick-connect connector (72) passes through the insertion hole (15) axially.

6. The valve rocker arm assembly according to claim 3, characterized in that, The baffle portion (71) extends radially outward across at least a portion of the outer peripheral surface of the main raceway portion (13).

7. The valve rocker arm assembly according to claim 6, characterized in that, The baffle portion (71) does not extend radially outward beyond the outer peripheral surface of the narrowing raceway portion (14).

8. The valve rocker arm assembly according to any one of claims 3 to 7, characterized in that, The main raceway portion (13) is an arc-shaped structure that extends partially in the circumferential direction and has an arc-shaped inner circumferential surface. The retaining cover (70) has a connecting portion (73) connecting the baffle portion (71) and the quick-connect connector (72). When the retaining cover (70) is installed on the outer rocker arm (10), the inner circumferential surface of the main raceway portion (13) fits against the connecting portion (73).

9. The valve rocker arm assembly according to claim 8, characterized in that, The raceway portion (12) also has a reinforcing rib (16) that extends radially from the inner circumferential surface of the main raceway portion (13) and connects to the narrowing raceway portion (14). The retaining cover (70) has a limiting groove (74) that extends radially on the connecting portion (73). When the retaining cover (70) is mounted on the outer rocker arm (10), the reinforcing rib (16) is inserted into the limiting groove (74) to prevent the retaining cover (70) from rotating relative to the raceway portion (12).

10. The valve rocker arm assembly according to claim 8, characterized in that, The insertion hole (15) is eccentrically arranged with respect to the axis of the inner circumferential surface of the main raceway portion (13), thereby preventing the retaining cover (70) from rotating relative to the raceway portion (12).

Images