Valve rocker device and engine system

Abstract

The utility model relates to the technical field of vehicles, in particular to a valve rocker device and an engine system. The valve rocker device comprises a control assembly which comprises an elastic control piece arranged in a first cavity and an ejector rod arranged in a second cavity; the elastic control piece can open and close the communication port; the first channel communicates with the part, close to the communicating port, of the second cavity, and the second channel communicates with the part, away from the communicating port, of the second cavity, so that oil can be provided to push the ejector rod to eject the elastic control piece; the third channel is communicated between the first cavity and the piston cavity, and the fourth channel is communicated between the upper cavity and the piston cavity; the piston assembly comprises a piston and a piston resetting piece; the piston is provided with an installation cavity used for installing the piston reset piece, and the outer wall of the piston is provided with a groove communicated with the installation cavity. The piston can move in the piston cavity, and the groove can communicate with the fourth channel in the process of moving along with the piston.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially is involved in a valve rocker arm device and engine system. BACKGROUND

[0002] The engine is a kind of power machinery using gasoline or diesel as fuel, is composed of cylinder, crank connecting rod mechanism, gas distribution system, oil supply system, lubricating system etc.Part.Gas distribution system is the necessary component to ensure the normal operation of gasoline engine, generally includes the intake valve and exhaust valve provided on cylinder head, the opening and closing of intake valve and exhaust valve are respectively controlled by rocker arm assembly and other transmission parts, rocker arm assembly includes intake valve rocker arm, exhaust valve rocker arm and corresponding rocker arm shaft and valve rocker arm seat, intake valve rocker arm, exhaust valve rocker arm is respectively connected on intake valve rocker arm seat, exhaust valve rocker arm seat by intake valve rocker arm shaft, exhaust valve rocker arm shaft single degree of freedom, intake valve rocker arm, exhaust valve rocker arm one end is matched with intake valve and exhaust valve, the other end is matched with cam and uses the transmission control valve opening and closing of cam shaft.

[0003] CN105003314B discloses an integrated engine brake rocker arm, relates to the rocker arm structure capable of realizing normal exhaust, but the problem is that switching process exists valve seating fast, unstable. UTILITY MODEL CONTENT

[0004] The utility model is to provide a kind of valve rocker arm device and engine system, to solve the technical problem of the valve seating fast, unstable of prior art switching process to some extent.

[0005] The utility model provides a valve rocker arm device, including cam, rocker arm shaft and rocker arm, the rocker arm is rotationally arranged on cylinder body through rocker arm shaft, one end of rocker arm is equipped with gyro wheel, gyro wheel can move along the peripheral wall of cam, the side of rocker arm located rocker arm shaft's far away gyro wheel is equipped with control cavity and piston cavity, still include: first shaft oil channel and second shaft oil channel are equipped on rocker arm shaft, first channel, second channel, third channel and fourth channel are equipped on rocker arm, first channel communicates with first shaft oil channel, second channel communicates with second shaft oil channel, control cavity includes first cavity and second cavity that communicate through communicating port, control component, including setting in first cavity's elastic control piece and setting in second cavity's top rod, elastic control piece can open and close communicating port, first channel communicates with the part of second cavity close to communicating port, second channel communicates with the part of second cavity far from communicating port, to can provide oil liquid and push top rod and lift elastic control piece, third channel communicates between first cavity and piston cavity, fourth channel communicates between second cavity and piston cavity, piston component, including piston and piston reset piece, the installation cavity for installing piston reset piece is equipped on the piston, the outer wall of piston is equipped with the recess that communicates with installation cavity, the piston can move in piston cavity, the recess can communicate with fourth channel in the process of following piston movement.

[0006] When the first channel starts to supply oil, the oil can enter the piston cavity through the third channel and the fourth channel together. As the piston descends, the communication area between the fourth channel and the recess gradually decreases, so the piston descends gradually slowly, thereby making the piston descend and seat (contact with the valve structure) slowly and stably. When the working state of the rocker arm device is switched, the state of the piston is different. The rocker arm device provided in the embodiment can realize that the piston is either in the initial state or in the maximum descending state, and can avoid the piston being in the intermediate state between the above two states, that is, avoid the piston being in the half-lift state.

[0007] Further, the recess is an annular groove arranged on the outer wall of the piston.

[0008] Further, the flow area of the fourth channel at the communication position with the recess is smaller than the flow area of the recess at the communication position with the fourth channel.

[0009] Further, in the initial state, there is a gap between the top of the piston and the top of the piston cavity, and the communication position of the third channel with the piston cavity corresponds to the gap; the recess communicates with the fourth channel.

[0010] Further, the second cavity comprises an upper cavity and a lower cavity which are in communication with each other; the top rod comprises a rod part, a base part and a protruding part which are connected with each other; the cross-sectional area of the rod part is smaller than that of the base part, and the rod part is capable of contacting the elastic control member; the sidewall of the base part is capable of contacting the inner wall of the upper cavity; the protruding part is arranged on the sidewall of the base part, and the protruding part is located in the lower cavity, and the sidewall of the protruding part is capable of contacting the inner wall of the lower cavity; the second channel is in communication with the lower cavity, and the communication position of the second channel with the lower cavity is located on the side of the protruding part which is away from the rod part.

[0011] Further, the cross-sectional area of the lower cavity is larger than that of the upper cavity, so as to form a step in the second cavity; the control assembly further comprises a spring which is connected between the protruding part and the step.

[0012] Further, the elastic control member comprises a blocking ball and a control reset member, the control reset member is connected between the top of the first cavity and the blocking ball, and the blocking ball is capable of opening and closing the communication port.

[0013] Further, the first cavity is arranged through the upper part of the rocker arm, and an adjusting bolt is arranged at the top of the first cavity.

[0014] Further, the second cavity is arranged through the lower part of the rocker arm, and a lower blocking head is arranged at the lower part of the second cavity.

[0015] The utility model provides a kind of engine system, including valve structure and above-mentioned valve rocker arm device, the piston can drive the valve structure movement.

[0016] It should be understood that both the foregoing general description and the following detailed description are intended for purposes of illustration and description, and are not intended to limit the disclosure. The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate subject matter of the disclosure. Furthermore, the description and drawings are to be construed together in order to explain the principles of the disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor according to these drawings.

[0018] Figure 1 It is the structural schematic diagram of valve rocker arm device of the utility model embodiment;

[0019] Figure 2 It is the structural schematic diagram of valve rocker arm device of the utility model embodiment; Figure 1Fig. 1 is a schematic view of a valve rocker arm device in a piston assembly failure state;

[0020] Figure 3 For Figure 1 Fig. 2 is a schematic view of a valve rocker arm device in a normal piston assembly state.

[0021] Fig. 1 is a schematic view of a valve rocker arm device in a piston assembly failure state;

[0022] 1-cam; 2-rocker shaft; 3-rocker; 4-roller; 5-control assembly; 6-piston assembly; 7-adjusting bolt; 8-lower plug; 9-valve contact; 21-first shaft oil passage; 22-second shaft oil passage; 31-first channel; 32-second channel; 33-third channel; 34-fourth channel; 35-first cavity; 36-second cavity; 361-upper cavity; 362-lower cavity; 37-piston cavity; 51-top rod; 511-rod part; 512-base part; 513-protrusion part; 52-spring; 53-plugging ball; 54-control reset member; 61-piston; 62-piston reset member; 63-mounting cavity; 64-groove. DETAILED DESCRIPTION

[0023] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application.

[0024] The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0025] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", "fourth" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication。For ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0028] In addition, the terms "horizontal", "vertical", "overhang" and other terms do not mean that the components must be absolutely horizontal or overhung, but can be slightly inclined. As "horizontal" only means that its direction is more horizontal relative to "vertical", not that the structure must be completely horizontal, but can be slightly inclined.

[0029] As Figures 1 to 3 The utility model provides a rocker arm device, including cam 1, rocker arm shaft 2 and rocker arm 3, the rocker arm 3 is rotationally arranged on the cylinder through rocker arm shaft 2, and one end of the rocker arm 3 is provided with a roller 4, the roller 4 can move along the peripheral wall of cam 1, and the rocker arm 3 is provided with control cavity and piston cavity 37 on the side away from the roller 4 of rocker arm shaft 2;Still include: the first shaft oil way 21 and the second shaft oil way 22 are arranged on rocker arm shaft 2;The first channel 31, the second channel 32, the third channel 33 and the fourth channel 34 are arranged on the rocker arm 3;The first channel 31 is communicated with the first shaft oil way 21, and the second channel 32 is communicated with the second shaft oil way 22;The control cavity includes the first cavity 35 and the second cavity 36 communicated through the communicating port;Control assembly 5 includes the elastic control member arranged in the first cavity 35 and the top rod 51 arranged in the second cavity 36;The elastic control member can open and close the communicating port;The first channel 31 is communicated with the part of the second cavity 36 close to the communicating port, and the second channel 32 is communicated with the part of the second cavity 36 away from the communicating port, so as to provide oil liquid to push the top rod 51 and lift the elastic control member;The third channel 33 is communicated between the first cavity 35 and the piston cavity 37, and the fourth channel 34 is communicated between the second cavity 36 and the piston cavity 37;Piston assembly 6 includes piston 61 and piston return member 62;The piston 61 is provided with the mounting cavity 63 for mounting the piston return member 62, and the outer wall of the piston 61 is provided with the groove 64 communicated with the mounting cavity 63;The piston 61 can move in the piston cavity 37, and the groove 64 can be communicated with the fourth channel 34 in the process of following the piston 61 movement.

[0030] In the initial state, the rocker arm 3 can also be considered to be in the inoperative state, and the groove 64 is in communication with the fourth channel 34. When the valve needs to be opened, the second shaft oil passage 22 is closed, and the first shaft oil passage 21 supplies oil. The oil enters the second cavity 36 through the first channel 31. After the oil enters the second cavity 36, part of the oil pushes the elastic control member to move away from the communication port, thereby opening the communication port, and then the oil enters the first cavity 35. The oil in the first cavity 35 then enters the piston cavity 37 through the third channel 33. At the same time, another part of the oil enters the groove 64 through the fourth channel 34 and then enters the mounting cavity 63. The oil pushes the piston 61 to descend and contact the valve structure (or a valve contact member 9 connected to the lower end of the piston 61, which moves with the piston 61, and can contact the valve structure when descending), and the groove 64 gradually deviates from the fourth channel 34, and the two are no longer in communication. When the roller 4 moves along the convex of the cam 1, the piston 61 has a tendency to push the valve structure downward to open, and the valve structure has a reaction force on the piston 61, thereby increasing the oil pressure in the piston cavity 37. The oil pressure in the first cavity 35 increases, and the restoring force of the elastic control member causes the elastic control member to close the communication port again. At this time, the first cavity 35, the third channel 33, and the piston cavity 37 form a closed space filled with oil, forming a rigid force transmission structure. Therefore, during the process of the roller 4 moving along the convex to the highest point and then to the lowest point, the stroke of the roller 4 rising at the end is the stroke of the piston 61 descending, and the valve can be opened during this process.

[0031] When the rocker arm 3 needs to be in the inoperative state, the second shaft oil passage 22 supplies oil (the first shaft oil passage 21 can still supply oil), which overcomes the oil pressure supplied to the first channel 31. The oil enters the second cavity 36 and acts on the jack 51 to push the jack 51 upward to open the elastic control member, and the communication port is opened. The oil in the piston cavity 37, the oil in the third channel 33, and the oil in the first cavity 35 can return to the second cavity 36 through the communication port, and the oil near the communication port of the second cavity 36 can return to the first channel 31 and then be discharged. At the same time, under the action of the piston return member 62 and the reduction of the oil, the piston 61 gradually returns. During the process of the piston 61 returning, the communication area between the groove 64 and the fourth channel 34 gradually increases, and the oil can also enter the second cavity 36 through the groove 64 and the fourth channel 34 and then return to the first channel 31. Finally, the piston 61 returns to the initial state.

[0032] In the opening process of the valve, when the first channel 31 just starts to supply oil, the oil can enter the piston cavity 37 together through the third channel 33 and the fourth channel 34. As the fourth channel 34 gradually reduces the communication area with the groove 64 as the piston 61 descends, the piston 61 gradually slows down in descending, so that the piston 61 descends and seats (contacts with the valve structure) slowly and smoothly. When the working state of the rocker arm device is switched, the state of the piston 61 is different. The rocker arm device provided in the embodiment can realize that the piston is either in the initial state or in the maximum descending state, so that the piston can be prevented from being in the intermediate state between the above two states, that is, the piston can be prevented from being in the half-lift state.

[0033] It can be understood that the first shaft oil channel can be set in an always-oil-supplying state, and an electric control valve (for example, a solenoid valve or an electric valve) can be arranged at the second shaft oil channel 22. The electric control valve is used to open and close the second shaft oil channel 22, which is convenient for control.

[0034] The groove 64 in a rectangular, circular or other shape can be arranged at a position of the side wall of the piston 61 and can be in communication with the fourth channel 34.

[0035] As an optional solution, as shown in Figures 1 to 3 , the groove 64 is an annular groove arranged on the outer wall of the piston 61, which is convenient for processing and also facilitates the interval arrangement of multiple communication channels along the circumference of the piston 61. The communication channels are in communication between the groove 64 and the mounting cavity 63.

[0036] As an optional solution, as shown in Figures 1 to 3 , the flow area of the mounting cavity 63 at the communication position with the groove 64 is smaller than the flow area of the groove 64 at the communication position with the fourth channel 34.

[0037] As an optional solution, as shown in Figure 1 and Figure 2 , in the initial state, the top of the piston 61 is spaced apart from the top of the piston cavity 37, and the communication position of the third channel 33 with the piston cavity 37 corresponds to the spacing. The groove 64 is in communication with the fourth channel 34.

[0038] In the initial state, the top of the piston 61 is located below the communication position of the third channel 33 with the piston cavity 37 in the embodiment. In this way, the piston 61 is prevented from blocking the third channel 33 and hindering the oil from entering the piston cavity 37.

[0039] As an optional solution, as shown in Figures 1 to 3As shown in the drawings, the second cavity 36 comprises an upper cavity 361 and a lower cavity 362 which are in communication with each other; the top rod 51 comprises a rod portion 511, a base portion 512 and a protruding portion 513 which are connected with each other; the cross-sectional area of the rod portion 511 is smaller than that of the base portion 512, the rod portion 511 can be in contact with the elastic control member, and a space is formed between the rod portion 511 and the upper cavity 361, so that the oil liquid can enter the upper cavity 361 conveniently; the side wall of the base portion 512 can be in contact with the inner wall of the upper cavity 361; the protruding portion 513 is arranged on the side wall of the base portion 512 and located in the lower cavity 362, and the side wall of the protruding portion 513 can be in contact with the inner wall of the lower cavity 362; the second channel 32 is in communication with the lower cavity 362, and the communication position of the second channel 32 and the lower cavity 362 is located on the side of the protruding portion 513 which is away from the rod portion 511, so that the oil liquid entering the lower cavity 362 can act on the protruding portion 513, thereby pushing the top rod 51 to rise.

[0040] As shown in the drawings, Figures 1 to 3 on the basis of the above embodiment, further, the cross-sectional area of the lower cavity 362 is larger than that of the upper cavity 361, so as to form a step in the second cavity 36; the control assembly further comprises a spring 52 which is connected between the protruding portion 513 and the step, and the spring 52 can be arranged to facilitate the reset of the top rod 51.

[0041] As shown in the drawings, Figures 1 to 3 on the basis of the above embodiment, further, the elastic control member comprises a blocking ball 53 and a control reset member 54, the control reset member 54 is connected between the top of the first cavity 35 and the blocking ball 53, and the blocking ball 53 can open and close the communication port.

[0042] As an optional solution, as shown in the drawings, Figures 1 to 3 the first cavity 35 is arranged through the upper part of the rocker arm, the adjusting bolt 7 is arranged at the top of the first cavity 35, the elastic control member can be assembled conveniently, and the adjusting bolt 7 can be arranged to adjust the distance from the adjusting bolt 7 to the communication port, so as to adjust the pre-pressing force of the control reset member 54 (for example, the spring 52).

[0043] As an optional solution, as shown in the drawings, Figures 1 to 3 the second cavity 36 is arranged through the lower part of the rocker arm, and the lower plug 8 is arranged at the lower part of the second cavity 36, so as to facilitate the installation of the top rod 51 and the spring 52.

[0044] The embodiment of the utility model further provides an engine system which comprises the valve rocker arm device of any one of the above technical schemes, so that the valve rocker arm device has all the beneficial technical effects, and here, no longer be repeated. The engine system further comprises a valve structure (for example, a valve bridge, a valve pin, a socket or a valve) and a piston 61 which can drive the valve structure to move.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced equivalently. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not described in detail in order not to obscure the understanding of the present specification. In addition, those skilled in the art can understand that although some embodiments herein include some features included in other embodiments but not others, the combination of features of different embodiments means to be within the scope of the present application and forms different embodiments.

Claims

1. A valve rocker arm device comprising a cam, a rocker shaft and a rocker, said rocker being provided on a cylinder by said rocker shaft being rotatable, one end of said rocker being provided with a roller, said roller being movable along a peripheral wall of said cam, said rocker being provided with a control chamber and a piston chamber on a side of said rocker shaft away from said roller, characterized in that, Also include: The rocker shaft is provided with a first shaft oil channel and a second shaft oil channel; The rocker arm is provided with a first channel, a second channel, a third channel and a fourth channel; The first channel is in communication with the first shaft oil channel, and the second channel is in communication with the second shaft oil channel; The control cavity includes a first cavity and a second cavity in communication through a communication port; The control assembly includes an elastic control member arranged in the first cavity and a top rod arranged in the second cavity; the elastic control member can open and close the communication port; the first channel is in communication with a part of the second cavity close to the communication port, and the second channel is in communication with a part of the second cavity away from the communication port, so as to provide oil liquid to push the top rod to lift the elastic control member; The third channel is in communication between the first cavity and the piston cavity, and the fourth channel is in communication between the second cavity and the piston cavity; The piston assembly includes a piston and a piston return member; the piston is provided with a mounting cavity for mounting the piston return member, and the outer wall of the piston is provided with a groove in communication with the mounting cavity; the piston can move in the piston cavity, and the groove can be in communication with the fourth channel during movement of the piston.

2. The valve rocker arm device according to claim 1, wherein The groove is an annular groove arranged on the outer wall of the piston.

3. The valve rocker arm device according to claim 2, wherein The flow area of the communication between the mounting cavity and the groove is smaller than the flow area of the communication between the groove and the fourth channel.

4. The valve rocker arm device according to claim 2, wherein In the initial state, there is a gap between the top of the piston and the top of the piston cavity, and the communication between the third channel and the piston cavity corresponds to the gap; the groove is in communication with the fourth channel.

5. The valve rocker arm device according to any one of claims 1-4, wherein The second cavity includes an upper cavity and a lower cavity in communication with each other; The top rod includes a rod portion, a base portion and a protruding portion connected with each other; the cross-sectional area of the rod portion is smaller than that of the base portion, and the rod portion can be in contact with the elastic control member; The side wall of the base portion can be in contact with the inner wall of the upper cavity; the protruding portion is arranged on the side wall of the base portion, and the protruding portion is located in the lower cavity; the side wall of the protruding portion can be in contact with the inner wall of the lower cavity; The second channel is in communication with the lower cavity, and the communication between the second channel and the lower cavity is located on the side of the protruding portion away from the rod portion.

6. The valve rocker arm device according to claim 5, wherein The cross-sectional area of the lower cavity is larger than that of the upper cavity, so as to form a step in the second cavity; The control assembly further includes a spring connected between the protruding portion and the step.

7. The valve rocker arm apparatus of claim 2, wherein The elastic control member includes a blocking ball and a control return member connected between the top of the first cavity and the blocking ball, and the blocking ball can open and close the communication port.

8. The valve rocker arm device according to claim 1, wherein The first cavity is arranged through the upper part of the rocker arm, and an adjusting bolt is arranged at the top of the first cavity.

9. The valve rocker arm apparatus of claim 1, wherein, The second cavity is arranged through the lower part of the rocker arm, and a lower plug is arranged at the lower part of the second cavity.

10. An engine system characterized by, The valve rocker arm apparatus of any one of claims 1-9, wherein the piston is configured to move the valve structure.

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