Polishing valve rocker capable of improving binding force of DLC coating

Abstract

The utility model discloses a polishing valve rocker capable of improving the binding force of a DLC coating. The problem that in the prior art, due to the fact that the temperature of a valve rocker is too high, the coating falls off is solved. The engine rocker arm comprises a rocker arm body arranged in an engine, a separation groove formed in one end of the rocker arm body and used for separating the rocker arm body into a cam contact surface and a valve rod contact surface, coatings attached to the cam contact surface and the valve rod contact surface respectively, and a heat dissipation mechanism arranged on the rocker arm body and used for conducting heat dissipation on the rocker arm body. The separation groove can conveniently distinguish the cam contact face and the valve rod contact face so as to facilitate installation of the rocker arm body, heat dissipation can be conducted on the cam contact face and the valve rod contact face through the separation groove, and therefore the abrasion resistance of the rocker arm body is enhanced, and the heat dissipation mechanism is arranged on the rocker arm body, so that the service life of the rocker arm body is prolonged. And the rocker arm body can be further cooled, so that the coating is prevented from falling off.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rocker arm spraying technical field, concretely relates to a polishing valve rocker arm capable of improving DLC coating adhesion. BACKGROUND

[0002] The valve rocker arm is a transmission part between the cam and the valve rod, and transmits power brought by the cam lift to the valve rod. The two arc surfaces of the valve rocker arm simultaneously slide and rub against the cam and the valve rod. The motorcycle engine has high speed, and the speed of the high-performance engine reaches 16000 rpm. Therefore, the surface quality of the rocker arm arc surface is required to be very high.

[0003] Currently, the coating adhesion rating of the valve rocker arm arc surface is required to be in the HF1-HF3 level. Since the key factor affecting the coating adhesion is the surface quality of the rocker arm base, improving the coating adhesion under the premise of ensuring that the key dimensions and the shape and position tolerances of the rocker arm meet the design requirements becomes a breakthrough. Since the valve rocker arm generates high temperature under high speed and high strength working conditions, the impact resistance of the coating decreases with the increase of the temperature of the valve rocker arm, which may cause the coating to fall off. After the coating falls off, the valve rocker arm and the cam shaft may be abnormally worn, the engine performance may be reduced, and the engine may be scrapped if the wear is too serious. SUMMARY

[0004] The utility model provides a polishing valve rocker arm capable of improving DLC coating adhesion to at least solve part of the above technical problems.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A polishing valve rocker arm capable of improving DLC coating adhesion, comprising a rocker arm body arranged in an engine, one end of the rocker arm body is provided with a separation groove for separating the end of the rocker arm body into a cam contact surface and a valve rod contact surface, a layer of coating is respectively arranged on the cam contact surface and the valve rod contact surface, and a heat dissipation mechanism for dissipating heat of the rocker arm body is arranged on the rocker arm body.

[0007] Further, the rocker arm body is rotatably installed in the engine through the mounting hole.

[0008] Further, one air slot communicating with the separation groove is respectively arranged on each side of the rocker arm body, and the heat dissipation mechanism is arranged in the air slot.

[0009] Further, the heat dissipation mechanism comprises a plurality of heat dissipation holes arranged in the air slot.

[0010] Further, the surface roughness of the cam contact surface and the valve rod contact surface is Ra0.05.

[0011] Further, the cam contact surface and the valve stem contact surface are arc-shaped structures.

[0012] Further, the coating is a DLC coating.

[0013] Further, the coating has a thickness of 3-5 microns.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model discloses simple structure, scientific and reasonable in design, convenient to use, the utility model discloses the separation groove not only can be convenient for distinguishing the cam contact surface and valve stem contact surface to the installation of rocker arm body is facilitated, and through separation groove can still heat dissipation to the cam contact surface and valve stem contact surface, thereby enhancing the wear resistance of rocker arm body, can avoid coating respectively adhering to the cam contact surface and valve stem contact surface surface simultaneously because temperature is too high, and through coating can effectively enhance wear resistance, thereby improving the service life of rocker arm body. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic diagram of the utility model.

[0017] Figure 2 It is the plan view of the utility model rocker arm body.

[0018] Figure 3 It is the bottom view of the utility model rocker arm body.

[0019] Among them, the name of the corresponding mark is:

[0020] 1, rocker arm body;2, cam contact surface;3, valve stem contact surface;4, separation groove;5, coating;6, mounting hole;7, empty slot;8, heat dissipation hole. DETAILED DESCRIPTION

[0021] In order to make the utility model's purpose, technical scheme and advantage more clearly clear, the following is combined with the drawing, and the utility model is further detailed. Obviously, the described embodiment only is a part embodiment of the utility model, and is not all embodiments. Based on the embodiment in the utility model, all other embodiments that the person skilled in the art obtains without making creative labor belong to the scope of the utility model protection.

[0022] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it needs to explain, unless otherwise expressly provided and limited, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrally connected; of course, it can also be mechanical connection, or electrical connection; in addition, it can also be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] Embodiment 1.

[0025] As Figures 1-3 shown, the utility model provides a kind of polishing valve rocker capable of improving the adhesion of DLC coating, including the rocker body 1 in engine, the separation groove 4 being opened in one end of rocker body 1 and separating rocker body 1 into cam contact surface 2 and valve stem contact surface 3, coating 5 respectively adhered on cam contact surface 2 and valve stem contact surface 3, and heat dissipation mechanism for being arranged on rocker body 1 to heat dissipation rocker body 1.

[0026] The rocker body 1 of the utility model is installed in engine, and the separation groove 4 is provided on the rocker body 1, which separates the rocker body 1 into the cam contact surface 2 and the valve stem contact surface 3, so that the rocker body 1 is in contact with the cam through the cam contact surface 2 and the valve stem contact surface 3, so as to facilitate the cam to drive the rocker body 1 to run. The separation groove 4 not only facilitates the differentiation of the cam contact surface 2 and the valve stem contact surface 3, but also facilitates the installation of the rocker body 1. In addition, the separation groove 4 can also dissipate heat from the cam contact surface 2 and the valve stem contact surface 3, thereby enhancing the wear resistance of the rocker body 1. The coating 5 is adhered to the surface of the cam contact surface 2 and the valve stem contact surface 3 respectively. The coating 5 can effectively enhance the wear resistance, thereby prolonging the service life of the rocker body 1. The heat dissipation mechanism can dissipate heat from the rocker body 1 during use, thereby avoiding the increase of wear caused by the high temperature of the rocker body 1.

[0027] Embodiment 2.

[0028] As Figures 1-3 shown, the utility model provides a kind of polished valve rocker capable of improving the adhesion of DLC coating, including the rocker body 1 in engine, the separation groove 4 being opened in one end of rocker body 1 and separating rocker body 1 into cam contact surface 2 and valve stem contact surface 3, coating 5 respectively adhering on cam contact surface 2 and valve stem contact surface 3, and the heat dissipation mechanism for being used to the heat dissipation of rocker body 1 is located on rocker body 1.

[0029] The mounting hole 6 is arranged on rocker body 1, and rocker body 1 is rotatably installed in engine through mounting hole 6.

[0030] The more preferred structure of rocker body 1 is given in embodiment 2 based on embodiment 1, specifically: the mounting hole 6 is arranged on rocker body 1, and rocker body 1 is rotatably installed in engine through mounting hole 6.

[0031] The utility model can facilitate the installation of rocker body 1 in engine through mounting hole 6, and mounting hole 6 can also limit the installation position of rocker body 1 to facilitate the installation of rocker body 1.

[0032] Embodiment 3.

[0033] As Figures 1-3 shown, the utility model provides a kind of polished valve rocker capable of improving the adhesion of DLC coating, including the rocker body 1 in engine, the separation groove 4 being opened in one end of rocker body 1 and separating rocker body 1 into cam contact surface 2 and valve stem contact surface 3, coating 5 respectively adhering on cam contact surface 2 and valve stem contact surface 3, and the heat dissipation mechanism for being used to the heat dissipation of rocker body 1 is located on rocker body 1.

[0034] The empty groove 7 in communication with separation groove 4 is respectively arranged on the two sides of rocker body 1, and heat dissipation mechanism is located in empty groove 7.

[0035] The more preferred structure of rocker body 1 is given in embodiment 3 based on embodiment 1, specifically: the empty groove 7 in communication with separation groove 4 is respectively arranged on the two sides of rocker body 1, and heat dissipation mechanism is located in empty groove 7.

[0036] The two empty grooves 7 are respectively arranged on the two sides of rocker body 1, and the two empty grooves 7 are all in communication with separation groove 4, and empty groove 7 can effectively reduce the weight of rocker body 1, and also facilitate the installation of heat dissipation mechanism.

[0037] Embodiment 4.

[0038] As Figures 1-3As shown, the utility model provides a polished valve rocker arm capable of improving the bonding strength of the DLC coating, comprising a rocker arm body 1 arranged in an engine, a separation groove 4 opened at one end of the rocker arm body 1 and dividing the rocker arm body 1 into a cam contact surface 2 and a valve stem contact surface 3, a coating 5 respectively attached to the cam contact surface 2 and the valve stem contact surface 3, and a heat dissipation mechanism arranged on the rocker arm body 1 for dissipating heat from the rocker arm body 1.

[0039] An empty slot 7 communicating with the separation slot 4 is respectively formed on both side walls of the rocker arm body 1 , and the heat dissipation mechanism is located in the empty slot 7 .

[0040] The heat dissipation mechanism includes a plurality of heat dissipation holes 8 provided in the empty slots 7 .

[0041] This embodiment 4 provides a more preferred structure of the heat dissipation mechanism based on the embodiment 3, specifically: the heat dissipation mechanism includes a plurality of heat dissipation holes 8 provided in the empty slot 7.

[0042] The utility model preferably has four heat dissipation holes 8, which are evenly distributed on the rocker arm body 1 and located in the empty slot 7. The heat dissipation holes 8 can facilitate heat dissipation of the rocker arm body 1, thereby preventing the rocker arm body 1 from being overheated and causing the rocker arm body 1 to wear too quickly.

[0043] Example 5.

[0044] Such as Figures 1-3 As shown, the utility model provides a polished valve rocker arm capable of improving the bonding strength of the DLC coating, comprising a rocker arm body 1 arranged in an engine, a separation groove 4 opened at one end of the rocker arm body 1 and dividing the rocker arm body 1 into a cam contact surface 2 and a valve stem contact surface 3, a coating 5 respectively attached to the cam contact surface 2 and the valve stem contact surface 3, and a heat dissipation mechanism arranged on the rocker arm body 1 for dissipating heat from the rocker arm body 1.

[0045] The surface roughness of the cam contact surface 2 and the valve stem contact surface 3 are both Ra0.05.

[0046] Based on Example 1, Example 5 provides a more preferred structure of the cam contact surface 2 and the valve stem contact surface 3. Specifically, the surface roughness of the cam contact surface 2 and the valve stem contact surface 3 are both Ra0.05.

[0047] The surface roughness of the cam contact surface 2 and the valve stem contact surface 3 of the utility model are both Ra0.05. The roughness of Ra0.05 can facilitate the adhesion of the coating 5, and as the surface roughness of the cam contact surface 2 and the valve stem contact surface 3 decreases, the adhesion force of the coating 5 is higher, thereby effectively improving the impact strength and fatigue strength of the coating 5, thereby improving the wear resistance of the rocker arm body 1.

[0048] The polishing equipment is used for polishing the cam contact surface 2 and the valve rod contact surface 3, so that the surface roughness of the cam contact surface 2 and the valve rod contact surface 3 reaches Ra0.05.

[0049] Embodiment 6.

[0050] As Figures 1-3 shown, the utility model provides a kind of polishing valve rocker arm capable of improving the adhesion of DLC coating, including the rocker body 1 in engine, the separation groove 4 being opened in one end of rocker body 1 and separating rocker body 1 into cam contact surface 2 and valve rod contact surface 3, coating 5 respectively adhering on cam contact surface 2 and valve rod contact surface 3, and heat dissipation mechanism for being arranged on rocker body 1 and being used to heat dissipation to rocker body 1.

[0051] Cam contact surface 2 and valve rod contact surface 3 are arc structure.

[0052] This embodiment 6 is more preferred structure of cam contact surface 2 and valve rod contact surface 3 based on embodiment 1, specifically: cam contact surface 2 and valve rod contact surface 3 are arc structure.

[0053] The cam contact surface 2 of the arc structure can effectively reduce the friction between the cam contact surface 2 and the cam, and the valve rod contact surface 3 of the arc structure can effectively reduce the friction between the valve rod and the valve rod contact surface 3, so as to improve the service life of the rocker body 1.

[0054] Embodiment 7.

[0055] As Figures 1-3 shown, the utility model provides a kind of polishing valve rocker arm capable of improving the adhesion of DLC coating, including the rocker body 1 in engine, the separation groove 4 being opened in one end of rocker body 1 and separating rocker body 1 into cam contact surface 2 and valve rod contact surface 3, coating 5 respectively adhering on cam contact surface 2 and valve rod contact surface 3, and heat dissipation mechanism for being arranged on rocker body 1 and being used to heat dissipation to rocker body 1.

[0056] Coating 5 adopts DLC coating.

[0057] The utility model coating 5 adopts DLC coating, DLC coating has lower low friction coefficient, excellent wear resistance and high hardness, so that when coating 5 is attached on cam contact surface 2 and valve rod contact surface 3, the friction between rocker body 1 and cam and valve rod can be reduced, so as to prolong the service life of rocker body 1, and the DLC coating of the utility model is diamond-like carbon film.

[0058] Embodiment 8.

[0059] AsFigures 1-3 The utility model provides a polishing valve rocker arm that can improve the bonding force of DLC coating, which comprises a rocker arm body 1 arranged in an engine, a separation groove 4 arranged at one end of the rocker arm body 1 and separating the rocker arm body 1 into a cam contact surface 2 and a valve rod contact surface 3, a coating 5 attached to the cam contact surface 2 and the valve rod contact surface 3 respectively, and a heat dissipation mechanism arranged on the rocker arm body 1 for dissipating heat from the rocker arm body 1.

[0060] The thickness of the coating 5 is 3-5 microns.

[0061] The thickness of the coating 5 is 3-5 microns.

[0062] The thickness of the coating 5 is 3-5 microns, preferably 4 microns. The coating 5 with a thickness of 4 microns can effectively reduce the friction coefficient of the rocker arm body 1, and will not increase the production cost due to the over-thickness of the coating 5.

[0063] The engine, cam, polishing equipment and valve rod used in the utility model are prior art and can be directly purchased and used on the market. Therefore, the structure of the engine, cam, polishing equipment and valve rod is not described here.

[0064] Finally, it should be noted that: the above embodiments are only the preferred embodiments of the utility model for illustrating the technical solutions of the utility model, but not limiting them, and of course, they are not limiting the patent scope of the utility model; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and 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 utility model; that is, any modification or polishing with no substantive meaning made in the main design idea and spirit of the utility model, which still solves the technical problems consistent with the utility model, should be included in the protection scope of the utility model; in addition, the technical solutions of the utility model are directly or indirectly used in other related technical fields, which are also included in the patent protection scope of the utility model.

Claims

1. A polished valve rocker arm capable of improving the bonding strength of a DLC coating, comprising a rocker arm body (1) disposed in an engine, characterized in that: A separation groove (4) is provided at one end of the rocker arm body (1) for separating the end of the rocker arm body (1) into a cam contact surface (2) and a valve stem contact surface (3); a coating (5) is provided on each of the cam contact surface (2) and the valve stem contact surface (3); and a heat dissipation mechanism for dissipating heat from the rocker arm body (1) is provided on the rocker arm body (1).

2. The polished valve rocker arm capable of improving the bonding strength of the DLC coating according to claim 1, characterized in that: A penetrating mounting hole (6) is provided on the rocker arm body (1), and the rocker arm body (1) is rotatably mounted in the engine through the mounting hole (6).

3. The polished valve rocker arm capable of improving the bonding strength of the DLC coating according to claim 1, characterized in that: An empty slot (7) communicating with the separation slot (4) is respectively provided on both side walls of the rocker arm body (1), and the heat dissipation mechanism is located in the empty slot (7).

4. The polished valve rocker arm capable of improving the bonding strength of the DLC coating according to claim 3, characterized in that: The heat dissipation mechanism comprises a plurality of heat dissipation holes (8) arranged in the empty slot (7).

5. The polished valve rocker arm capable of improving the bonding strength of the DLC coating according to claim 1, characterized in that: The surface roughness of the cam contact surface (2) and the valve stem contact surface (3) are both Ra0.

05.

6. The polished valve rocker arm capable of improving the bonding strength of the DLC coating according to claim 1, characterized in that: The cam contact surface (2) and the valve stem contact surface (3) are both arc-shaped structures.

7. The polished valve rocker arm capable of improving the bonding strength of the DLC coating according to claim 1, characterized in that: The coating (5) is a DLC coating.

8. The polished valve rocker arm capable of improving the bonding strength of the DLC coating according to claim 1, characterized in that: The coating (5) has a thickness of 3-5 μm.

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