Rocker arm assembly, exhaust braking system and engine

Abstract

The utility model provides a rocker arm assembly, exhaust brake system and engine, rocker arm assembly including rocker arm body and elephant foot part arranged at rocker arm body one end, elephant foot part is used for matching with valve bridge assembly and has rocker arm oil duct, rocker arm assembly also includes filter screen, and the filter screen is embedded in the rocker arm oil duct or is arranged at the end part of one side, facing the valve bridge assembly, of the rocker arm oil duct. By means of the technical scheme, impurities in oil can be effectively filtered out, the situation that the impurities enter the valve bridge assembly to cause damage or failure of the structure of the valve bridge assembly is avoided, abrasion, caused by the impurities, of the valve bridge assembly is avoided, the service life of the valve bridge assembly is prolonged, and further the service life of the valve bridge assembly is prolonged. By means of the arrangement, the maintenance frequency can be reduced to a certain degree, and the fault-free operation time of the engine with the rocker arm assembly is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine, specifically, a rocker arm assembly, exhaust brake system and engine. BACKGROUND

[0002] The rocker arm oil channel of the exhaust brake system in the prior art is communicated with the valve bridge oil channel, and the internal parts of the valve bridge assembly are driven by the working oil in the rocker arm oil channel, if there are impurities in the rocker arm oil channel, the impurities will directly enter the valve bridge assembly through the rocker arm oil channel and the valve bridge oil channel, and the internal parts of the valve bridge assembly will be stuck, and the function of the valve bridge assembly will be lost. SUMMARY

[0003] The utility model provides a kind of rocker arm assembly, exhaust brake system and engine, to solve the problem that the impurities in oil can enter valve bridge assembly from rocker arm oil channel, and further cause the structure of valve bridge assembly to be damaged or fail.

[0004] To solve the above problems, according to an aspect of the utility model, the utility model provides a kind of rocker arm assembly, rocker arm assembly includes rocker arm body and elephant foot part being set in one end of rocker arm body, elephant foot part is used to cooperate with valve bridge assembly and has rocker arm oil channel, rocker arm assembly further includes filter screen, filter screen is embedded in the inside of rocker arm oil channel or is set in the end of rocker arm oil channel towards valve bridge assembly side.

[0005] Further, the elephant foot part includes an oil seal block and an elephant foot body, the oil seal block is provided on the end of the rocker arm body, and both ends of the oil seal block in the axial direction protrude out of the rocker arm body, the elephant foot body is provided on the end of the oil seal block towards the valve bridge assembly, the elephant foot body has a first flow passage section, the oil seal block has a second flow passage section in communication with the first flow passage section, the first flow passage section and the second flow passage section form the rocker arm oil channel, and the filter screen is arranged in the first flow passage section and / or the second flow passage section.

[0006] Further, the first flow passage section or the second flow passage section has a clamping groove, and the rocker arm assembly further includes a clamping ring, the filter screen is clamped in the clamping groove by the clamping ring.

[0007] Further, the inner diameter of the clamping ring is greater than the inner diameter of the first flow passage section and the inner diameter of the second flow passage section.

[0008] Further, the clamping groove is a counterbore groove provided on the end of the first flow passage section away from the second flow passage section, and the radial dimension of at least part of the counterbore groove gradually increases in the direction of the second flow passage section towards the first flow passage section; or, the clamping groove is a counterbore groove provided on the end of the first flow passage section towards the second flow passage section, and the radial dimension of at least part of the counterbore groove gradually increases in the direction of the first flow passage section towards the second flow passage section.

[0009] Further, the card slot is a counterbore slot arranged at one end of the second flow passage section towards the first flow passage section, and a radial dimension of at least part of the counterbore slot gradually increases in a direction of the second flow passage section towards the first flow passage section.

[0010] Further, the filter screen is a plurality of filter screens, and the plurality of filter screens are sequentially and spacedly arranged along an extension direction of the rocker arm oil passage.

[0011] According to another aspect of the present application, an exhaust brake system is provided, which comprises a valve bridge assembly and the rocker arm assembly.

[0012] Further, the valve bridge assembly comprises a valve bridge body and an elastic component, the valve bridge body has a valve bridge oil passage corresponding to the rocker arm oil passage, the elastic component is installed on a side of the valve bridge body away from the elephant foot, so as to provide an elastic force for the valve bridge body to abut against the elephant foot; wherein, a filter screen is arranged in the valve bridge oil passage on a side of the valve bridge oil passage towards the rocker arm oil passage; and / or, a filter screen is arranged between the rocker arm oil passage and the valve bridge oil passage.

[0013] According to still another aspect of the present application, an engine is provided, which comprises the exhaust brake system.

[0014] The technical scheme of the present application provides a rocker arm assembly, which comprises a rocker arm body and an elephant foot arranged at one end of the rocker arm body, the elephant foot is used for cooperating with a valve bridge assembly and has a rocker arm oil passage, the rocker arm assembly further comprises a filter screen, the filter screen is arranged in the rocker arm oil passage or arranged at an end of the rocker arm oil passage on a side of the rocker arm oil passage towards the valve bridge assembly. By arranging the filter screen in the rocker arm oil passage or at the end of the rocker arm oil passage, impurities in oil can be effectively filtered out, so that the structure of the valve bridge assembly is prevented from being damaged or invalid due to the impurities entering the valve bridge assembly, thereby avoiding wear of the valve bridge assembly caused by the impurities, improving the service life of the valve bridge assembly, and further, the arrangement can reduce the maintenance frequency to a certain extent and prolong the trouble-free operation time of the engine using the rocker arm assembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 Fig. 1 shows a structure schematic view of a rocker arm assembly provided by an embodiment of the present application;

[0017] Figure 2 Fig. 2 shows a structure schematic view of a rocker arm assembly provided by another embodiment of the present application; Figure 1 Fig. 3 shows an enlarged view of the A position in Fig. 2;

[0018] Figure 3 A schematic diagram of the rocker arm assembly provided in Embodiment 2 of this utility model is shown;

[0019] Figure 4 It shows Figure 3 A magnified view of position B in the middle.

[0020] The above figures include the following reference numerals:

[0021] 10. Rocker arm assembly;

[0022] 101. Rocker arm oil passage; 1011. First flow channel section; 1012. Second flow channel section; 1013. Slot;

[0023] 11. Rocker arm body;

[0024] 12. Elephant foot; 121. Sealing block; 122. Elephant foot body;

[0025] 13. Filter screen;

[0026] 14. Snap ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0028] like Figures 1 to 4 As shown, this utility model provides a rocker arm assembly 10, which includes a rocker arm body 11 and a foot portion 12 disposed at one end of the rocker arm body 11. The foot portion 12 is used to cooperate with the valve bridge assembly and has a rocker arm oil passage 101. The rocker arm assembly 10 also includes a filter screen 13, which is embedded in the rocker arm oil passage 101 or disposed at the end of the rocker arm oil passage 101 facing the valve bridge assembly.

[0029] In this embodiment, by providing a filter screen 13 inside or at the end of the rocker arm oil passage 101, impurities in the oil can be effectively filtered out, preventing impurities from entering the valve bridge assembly and causing damage or failure to the valve bridge assembly structure. This avoids wear of the valve bridge assembly caused by impurities, ensures the performance of the valve bridge assembly, and improves the service life of the valve bridge assembly. Furthermore, this arrangement can also reduce the maintenance frequency to a certain extent and extend the trouble-free operation time of the engine using the rocker arm assembly 10.

[0030] Specifically, the elephant foot 12 comprises an oil sealing block 121 and an elephant foot body 122, the oil sealing block 121 is arranged at the end of the rocker arm body 11 and protrudes from the rocker arm body 11 at both ends in the axial direction, the elephant foot body 122 is arranged at the end of the oil sealing block 121 facing the valve bridge assembly, the elephant foot body 122 is provided with a first flow channel section 1011, the oil sealing block 121 is provided with a second flow channel section 1012 in communication with the first flow channel section 1011, the first flow channel section 1011 and the second flow channel section 1012 form a rocker arm oil channel 101, and the filter screen 13 is arranged in the first flow channel section 1011 and / or the second flow channel section 1012. In this way, the filter screen 13 can be arranged on the oil sealing block 121 or the elephant foot body 122 according to actual conditions, thereby improving the installation range of the filter screen 13.

[0031] It should be noted that the impurities mixed in the oil are less, and the influence of the impurities on the filtering effect and the filtering effect of the filter screen 13 is small, so that the filter screen 13 can be used for a long time without frequent disassembly and replacement.

[0032] Further, the first flow channel section 1011 or the second flow channel section 1012 is provided with a clamping groove 1013, and the rocker arm assembly 10 further comprises a clamping ring 14, and the filter screen 13 is clamped in the clamping groove 1013 by the clamping ring 14. In this way, the installation and replacement of the filter screen are more convenient and fast, the reliability and stability of the installation of the filter screen 13 are ensured, the operator can disassemble and assemble the filter screen 13, and the operator can easily replace the filter screen 13 without disassembling the entire system, thereby reducing downtime.

[0033] It can be understood that the setting mode of the filter screen 13 is not limited to clamping or not limited to clamping assisted by the clamping ring 14, but also other switching modes such as welding, which are not listed here.

[0034] Preferably, on the basis of ensuring the functionality of the elephant foot 12, the filter screen 13 can also be arranged between the first flow channel section 1011 and the second flow channel section 1012.

[0035] The inner diameter of the snap ring 14 is greater than the inner diameter of the first flow passage section 1011 and the inner diameter of the second flow passage section 1012. In this way, when the inner diameter of the snap ring 14 is smaller than the inner diameters of the first flow passage section 1011 and the second flow passage section 1012, the oil flowing in the rocker arm oil passage 101 is not hindered, and the smooth flow of the oil in the rocker arm oil passage 101 is ensured. At the same time, limiting the inner diameter of the snap ring 14 to be greater than the inner diameters of the first flow passage section 1011 and the second flow passage section 1012 is conducive to forming a variable-diameter area (liquid storage cavity) that facilitates the flow of oil. When the oil flows from an area with a smaller diameter to a variable-diameter area, the flow resistance is reduced, and when the oil flows from a variable-diameter area to an area with a larger diameter, the flow rate is increased, which is conducive to improving the flow effect of the oil.

[0036] In the first embodiment as shown in Figure 1 and Figure 2 The snap groove 1013 is a counterbore groove arranged at one end of the first flow passage section 1011 away from the second flow passage section 1012, and the radial dimension of at least part of the counterbore groove gradually increases in the direction of the second flow passage section 1012 towards the first flow passage section 1011.

[0037] In this embodiment, the counterbore groove at the end of the elephant foot body 122 cooperating with the valve bridge assembly is used as the snap groove 1013, the outer diameter of the filter screen 13 is matched with the inner diameter of the counterbore groove, and after the filter screen 13 is installed, the snap ring 14 is installed in the counterbore groove. The outer diameter of the snap ring 14 can be in interference fit with the counterbore groove, and the filter screen 13 is pressed at the bottom of the counterbore groove by the snap ring 14 to complete the installation of the filter screen 13. In this way, using the counterbore groove as the snap groove 1013 facilitates the limiting installation of the filter screen 13 and the snap ring 14, improves the convenience and reliability of disassembly and assembly, and at the same time, this design is also conducive to using snap rings 14 with different inner diameters according to the actual flow passage inner diameter to obtain a suitable oil storage cavity and enable the oil flowing through to achieve a better flow effect.

[0038] It can be understood that in another embodiment not shown in the figure, the snap groove 1013 can also be a counterbore groove arranged at one end of the first flow passage section 1011 towards the second flow passage section 1012, and the radial dimension of at least part of the counterbore groove gradually increases in the direction of the first flow passage section 1011 towards the second flow passage section 1012. In this embodiment, the counterbore groove at the end of the elephant foot body 122 cooperating with the oil sealing block 121 is used as the snap groove 1013, and the filter screen 13 and the snap ring 14 are installed in the same way as in the above-mentioned embodiment. After the filter screen 13 and the snap ring 14 are installed, the elephant foot body 122 is connected to the oil sealing block 121.

[0039] In the second embodiment as shown in Figure 3 and Figure 4In the shown second embodiment, the clamping groove 1013 is a counterbore groove arranged at one end of the second flow channel section 1012 facing the first flow channel section 1011, and the radial dimension of at least part of the counterbore groove gradually increases in the direction of the second flow channel section 1012 facing the first flow channel section 1011. In this embodiment, the counterbore groove arranged at the end of the elephant foot body 122 cooperating with the oil sealing block 121 is the clamping groove 1013, and the mounting mode of the filter screen 13 and the clamping ring 14 is the same as that of the above-mentioned embodiment. After the filter screen 13 and the clamping ring 14 are installed, the elephant foot body 122 and the oil sealing block 121 are connected.

[0040] Preferably, the filter screen 13 is multiple, and the multiple filter screens 13 are sequentially and spacedly arranged along the extension direction of the rocker arm oil channel 101. In this way, the filtering effect can be further improved, and the reliability of filtering can be ensured. Even if the filtering effect of part of the filter screens 13 decreases or fails, the other filter screens 13 can still play a filtering role, avoiding the situation that when a single filter screen 13 is used, the filter screen 13 fails to filter impurities in time, which is beneficial to ensure the long-term stable operation of the engine and reduce the risk of failure and maintenance demand.

[0041] It can be understood that when the filter screen 13 is multiple, the arrangement position thereof can be adjusted according to actual conditions, for example, the filter screens 13 can all be arranged on the first flow channel section 1011, or all be arranged on the second flow channel section 1012, or all be arranged on the first flow channel section 1011 and the second flow channel section 1012.

[0042] Another embodiment of the utility model provides a kind of exhaust brake system, and exhaust brake system includes valve bridge assembly and above-mentioned rocker arm assembly 10. By being arranged filter screen 13 in the inside or end portion of rocker arm oil channel 101, impurities in oil can be effectively filtered out, prevent impurities from entering valve bridge assembly to cause the structure of valve bridge assembly to be damaged or fail, guarantee the performance of valve bridge assembly and exhaust brake system and improve the service life of valve bridge assembly and exhaust brake system.

[0043] Specifically, the valve bridge assembly includes a valve bridge body and an elastic component, the valve bridge body has a valve bridge oil channel corresponding to the rocker arm oil channel 101, and the elastic component is installed on the side of the valve bridge body away from the elephant foot portion 12 to provide an elastic force for the valve bridge body to abut against the elephant foot portion 12. In this embodiment, the exhaust brake system is applied Figures 1 to 2As shown in the rocker arm assembly 10, the radial dimension of the area of the rocker arm oil passage 101 except the notch 1013 is adapted to the radial dimension of the valve bridge oil passage, the rocker arm oil passage 101 is filled with low-pressure oil, and the oil flows through the variable-diameter area (liquid storage cavity) during the process of flowing from the rocker arm oil passage 101 to the valve bridge oil passage and the process of flowing from the valve bridge oil passage back to the rocker arm oil passage 101, and the cross-sectional area of the oil flowing through the flow passage first increases and then decreases, which is beneficial to reducing the flow resistance and then increasing the flow rate, thereby improving the flow effect of the oil and quickly opening and closing the valve bridge body.

[0044] Meanwhile, as shown in Figs. Figure 1 and Figure 2 The countersunk groove is located at the end of the elephant foot body 122 abutting against the valve bridge body, and the oil in the variable-diameter area (liquid storage cavity) can appropriately penetrate into the gap between the elephant foot body 122 and the valve bridge body to reduce the wear of the two.

[0045] Preferably, the filter screen 13 can also be not limited to being arranged on the rocker arm oil passage 101, but can also be arranged in the inner side of the valve bridge oil passage towards the rocker arm oil passage 101, arranged between the rocker arm oil passage 101 and the valve bridge oil passage, and the like, so as to further improve the filtering effect of the oil flowing to the valve bridge oil passage.

[0046] Another embodiment of the utility model provides an engine, the engine includes the exhaust brake system. Through the adoption of the rocker arm assembly 10 and the valve bridge assembly in the exhaust brake system of the engine, not only the overall performance of the engine can be effectively improved, the service life of the engine is prolonged, but also the maintenance cost and time of the engine can be significantly reduced, the anti-wear ability and service life of the engine can be improved, and the maintenance frequency can be reduced.

[0047] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0048] The foregoing description, for purposes of explanation, sets forth specific values and arrangements of components and steps that are subject to many options. The intent is to be accurate in describing the principles and novel features of the application. Thus, although the application has been described with reference to specific embodiments thereof, it will be apparent to those of ordinary skill in the art that a number of changes can be made to the embodiments described without departing from the spirit and scope of the application. For example, the various features of the application can be combined in any combination, where possible. Accordingly, the scope of the application is to be construed as encompassing modifications and variations of the specific examples described herein, subject only to the conditions of the prior art.

[0049] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0050] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the example term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0051] In addition, it should be noted that the use of "first", "second" and the like words to limit parts, only for the convenience of distinguishing the corresponding parts, if there is no further declaration, the above words have no special meaning, therefore, it cannot be understood as a limitation on the protection scope of the present application.

[0052] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rocker arm assembly comprising a rocker arm body (11) and a foot (12) provided at one end of the rocker arm body (11), the foot (12) being configured to cooperate with a valve bridge assembly and having a rocker oil passage (101), characterized in that, The rocker arm assembly further comprises a filter screen (13) which is embedded in the rocker arm oil passage (101) or at the end of the rocker arm oil passage (101) towards the valve bridge assembly.

2. The rocker arm assembly of claim 1, wherein, The elephant foot (12) comprises an oil sealing block (121) and an elephant foot body (122), the oil sealing block (121) is arranged at the end of the rocker arm body (11) and protrudes from the rocker arm body (11) at both axial ends, the elephant foot body (122) is arranged at one end of the oil sealing block (121) towards the valve bridge assembly, the elephant foot body (122) has a first flow passage section (1011), the oil sealing block (121) has a second flow passage section (1012) which communicates with the first flow passage section (1011), the first flow passage section (1011) and the second flow passage section (1012) form the rocker arm oil passage (101), and the filter screen (13) is arranged in the first flow passage section (1011) and / or the second flow passage section (1012).

3. The rocker arm assembly of claim 2, wherein, The first flow passage section (1011) or the second flow passage section (1012) has a clamping groove (1013), and the rocker arm assembly further comprises a clamping ring (14), and the filter screen (13) is clamped in the clamping groove (1013) through the clamping ring (14).

4. The rocker arm assembly of claim 3, wherein, The inner diameter of the clamping ring (14) is greater than the inner diameter of the first flow passage section (1011) and the inner diameter of the second flow passage section (1012).

5. The rocker arm assembly according to claim 3, wherein The clamping groove (1013) is a counterbore groove arranged at one end of the first flow passage section (1011) away from the second flow passage section (1012), and the radial dimension of at least part of the counterbore groove gradually increases in the direction of the second flow passage section (1012) towards the first flow passage section (1011). Or, the clamping groove (1013) is a counterbore groove arranged at one end of the first flow passage section (1011) towards the second flow passage section (1012), and the radial dimension of at least part of the counterbore groove gradually increases in the direction of the first flow passage section (1011) towards the second flow passage section (1012).

6. The rocker arm assembly according to claim 3, wherein The clamping groove (1013) is a counterbore groove arranged at one end of the second flow passage section (1012) towards the first flow passage section (1011), and the radial dimension of at least part of the counterbore groove gradually increases in the direction of the second flow passage section (1012) towards the first flow passage section (1011).

7. The rocker arm assembly of claim 1, wherein, There are multiple filter screens (13), and multiple filter screens (13) are sequentially and spacedly distributed along the extension direction of the rocker arm oil passage (101).

8. An exhaust brake system characterized by, The exhaust brake system comprises a valve bridge assembly and the rocker arm assembly according to any one of claims 1 to 7.

9. The exhaust brake system of claim 8, wherein, The valve bridge assembly comprises a valve bridge body and an elastic component, the valve bridge body has a valve bridge oil passage corresponding to the rocker arm oil passage (101) in communication, the elastic component is installed on the side of the valve bridge body away from the elephant foot (12) to provide the valve bridge body with an elastic force abutting against the elephant foot (12); wherein, The filter screen (13) is arranged in the inner side of the valve bridge oil passage towards the rocker arm oil passage (101); And / or, the filter screen (13) is arranged between the rocker arm oil passage (101) and the valve bridge oil passage.

10. An engine characterized by, The engine comprises the exhaust brake system according to any one of claims 8 and 9.

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