A rocker structure with integrated HLA function

Abstract

This invention provides a rocker arm structure integrating brake and HLA functions, relating to the field of rocker arm technology. This application integrates the rocker arm body with the HLA function through an adjustment assembly, a brake tappet assembly, and an exhaust tappet assembly. The opening and closing of the brake and HLA functions are controlled by the opening and closing of a solenoid valve. On one hand, when the solenoid valve is open, the adjustment assembly closes the passage between the exhaust chamber and the hydraulic cylinder, maintaining pressure within the adjustment chamber. This allows the exhaust tappet assembly to eliminate the gap between the valve bridge and the exhaust tappet assembly under the action of the valve bridge, solving the technical problem of valve bridge tilting that occurs when integrating brake rocker arms with HLA functions in existing technologies. On the other hand, when the solenoid valve is closed, the brake tappet assembly resets under the action of the adjustment assembly, allowing the hydraulic fluid in the adjustment chamber and brake chamber to return to the solenoid valve along the oil path, thereby achieving the reset function of the brake tappet assembly.

Description

Technical Field

[0001] This invention relates to the field of rocker arm technology, and more specifically, to a rocker arm structure with integrated braking and HLA functions. Background Technology

[0002] When a vehicle is driving downhill, prolonged braking can cause the brakes to overheat, which can eventually affect their lifespan. Rocker arm braking is a technology that achieves in-cylinder braking by opening the exhaust valve earlier or later. Among them, HLA (Hydraulic Lash Adjuster) is a technology that achieves valve clearance adjustment without adjustment through a hydraulic tappet structure. It is used to automatically and in real time eliminate the thermal expansion gap between the components in the valve mechanism.

[0003] In related technologies, brake rocker arms and hydraulic valve clearance adjusters are typically two independent components that work in close coordination as a single system. However, existing brake rocker arms and hydraulic valve clearance adjusters cannot be integrated. The reason existing brake rocker arms cannot be used with HLA technology is that when the brake is engaged, the brake-side valve opens under the action of the brake tappet, while the exhaust valve on the other side remains closed. This creates a gap between the valve bridge and the brake-side valve, causing the valve bridge to tilt. Furthermore, after the valve bridge tilts, a gap remains between the piston rod and the valve bridge. HLA technology continuously injects oil into the piston chamber to eliminate this gap, leading to an increase in oil in the piston chamber and preventing the valve from closing after the brake is deactivated. Summary of the Invention

[0004] The present invention aims to provide a rocker arm structure with integrated braking and HLA functions, which integrates braking and HLA functions, can prevent valve bridge tilting, and can also realize the repositioning of the brake tappet assembly.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a rocker arm structure with integrated braking HLA function, comprising:

[0007] The rocker arm body has an adjustment cavity, a braking cavity, and an exhaust cavity inside. The adjustment cavity is connected to the braking cavity and the exhaust cavity, respectively. The braking cavity is connected to a solenoid valve, and the exhaust cavity is connected to a hydraulic cylinder.

[0008] The system includes an adjustment assembly, a brake tappet assembly, and an exhaust tappet assembly. The adjustment assembly is movably disposed within the adjustment chamber and is used to selectively open or close the passage between the exhaust chamber and the hydraulic cylinder. The brake tappet assembly and the exhaust tappet assembly are movably disposed within the brake chamber and the exhaust chamber, respectively.

[0009] When the solenoid valve is opened, the regulating component closes the passage between the exhaust chamber and the cylinder, so that the exhaust tappet assembly eliminates the gap between the valve bridge and the exhaust tappet assembly under the action of the valve bridge.

[0010] When the solenoid valve is closed, the brake tappet assembly is reset by the action of the adjusting assembly.

[0011] In an optional embodiment, the adjustment assembly includes an adjustment screw structure, a first elastic element, an adjustment piston, and an adjustment plug, wherein the adjustment screw structure, the adjustment piston, and the adjustment plug are sequentially connected and disposed within the adjustment cavity;

[0012] The adjusting piston is movably configured, with one end of the adjusting piston having a gap with the adjusting screw structure to form an intermediate cavity, the intermediate cavity communicating with the braking cavity, the first elastic element located in the intermediate cavity and its two ends respectively abutting against the adjusting screw structure and the adjusting piston; the other end of the adjusting piston is connected to the adjusting sealing element;

[0013] The adjusting sealing member closes the passage between the exhaust chamber and the oil cylinder under the action of the first elastic member and the adjusting piston, so as to keep the oil in the exhaust chamber unchanged.

[0014] In an optional embodiment, the adjusting assembly further includes a push rod disposed in the intermediate cavity and connected to the adjusting piston, the first elastic element being sleeved on the push rod; the adjusting screw structure has an upper cavity that communicates with the braking cavity and is connected to the intermediate cavity;

[0015] When the solenoid valve is closed, the adjusting piston moves the push rod upward under the action of the oil, so that the push rod opens the passage between the upper cavity and the middle cavity, thereby resetting the brake tappet assembly.

[0016] In an optional embodiment, the adjusting piston and the end of the adjusting cavity away from the adjusting screw structure form a lower cavity, the lower cavity being connected to the oil cylinder through a first oil passage and the lower cavity being connected to the exhaust cavity through a second oil passage;

[0017] The adjusting and sealing component includes a first gasket, a first spherical plug, and a second elastic element. The first gasket is disposed at one end of the lower cavity near the first oil passage. The first spherical plug is disposed on the first gasket and closes the passage between the first oil passage and the lower cavity. One end of the second elastic element abuts against the adjusting piston, and the other end abuts against the first spherical plug. The elastic force of the first elastic element is greater than that of the second elastic element.

[0018] In an optional embodiment, the adjusting screw structure includes an adjusting screw, a screw plug, a third elastic element, and a second spherical plug. The adjusting screw is threaded to the first end of the adjusting cavity, and the screw plug is threaded at the end of the adjusting screw away from the adjusting piston and is threaded to the adjusting screw. The screw plug and the adjusting screw form the upper cavity.

[0019] The adjusting screw has a first opening that communicates with the upper cavity. The third elastic element and the second spherical plug are located in the upper cavity. The second spherical plug is fitted at the first opening. One end of the third elastic element abuts against the second spherical plug, and the other end abuts against the inner wall of the screw plug.

[0020] The adjusting piston, under the action of the oil, drives the push rod to move upward, so that the push rod pushes open the second spherical plug and opens the first opening.

[0021] In an optional embodiment, the brake tappet assembly includes a brake piston and a brake plug, wherein the brake piston is movably disposed within the brake chamber; the brake plug is disposed within the brake chamber and can selectively open or close the passage between the brake chamber and the solenoid valve.

[0022] The solenoid valve opens, and the brake piston extends.

[0023] In an optional embodiment, the outer wall of the brake piston is provided with a groove, and the groove and the inner wall of the brake cavity form an annular cavity; the brake piston is provided with a mounting cavity, a second opening and a brake flow channel connected in sequence, the brake flow channel is connected to the annular cavity, the mounting cavity is connected to the brake cavity, and the brake sealing member is located in the mounting cavity and movably disposed at the second opening;

[0024] The rocker arm body is also provided with an inlet and outlet oil passage, a third oil passage and a fourth oil passage. The inlet and outlet oil passage connects the solenoid valve and the annular cavity. The annular cavity is connected to the intermediate cavity through the third oil passage. The braking cavity is connected to the upper cavity through the fourth oil passage.

[0025] When the solenoid valve is opened, the brake sealing component opens the second opening, and the brake piston extends; when the solenoid valve is closed, the oil in the exhaust chamber returns to the regulating chamber, so that the regulating piston moves upward to open the passage between the upper chamber and the middle chamber, and the brake piston resets.

[0026] In an optional embodiment, the brake sealing member includes a brake ball seal, a second gasket, and a fourth elastic member. The brake ball seal is located at the second opening. The second gasket is engaged with the inner wall of the mounting cavity and located at one end of the mounting cavity away from the second opening. One end of the fourth elastic member is fixedly connected to the second gasket, and the other end is connected to the brake ball seal.

[0027] The second pad has an opening, and the mounting cavity communicates with the braking cavity through the opening.

[0028] In an optional embodiment, the brake tappet assembly further includes a fifth elastic element and a retaining ring, the fifth elastic element and the retaining ring being sleeved on the end of the brake piston away from the brake sealing element;

[0029] The retaining ring is disposed on the inner bottom wall of the brake chamber. One end of the fifth elastic element is connected to the retaining ring, and the other end is engaged with the brake piston. When the solenoid valve is closed, the fifth elastic element is reset to allow the brake piston to retract.

[0030] In an optional embodiment, the exhaust tappet assembly includes an exhaust piston, a sixth elastic element, and a recess. The exhaust piston is movably disposed within the exhaust chamber. The sixth elastic element is located within the exhaust chamber, with one end abutting against the exhaust piston and the other end abutting against the inner top wall of the exhaust chamber. The recess is disposed at the bottom end of the exhaust piston.

[0031] The beneficial effects of the rocker arm structure with integrated HLA function provided in this embodiment of the invention include:

[0032] By integrating the rocker arm body with the HLA function through the adjustment assembly, brake tappet assembly, and exhaust tappet assembly, the rocker arm body and HLA function are designed together. The opening and closing of the solenoid valve controls the opening and closing of the braking and HLA functions. On the one hand, when the solenoid valve is open, the adjustment assembly closes the passage between the exhaust chamber and the oil cylinder, maintaining the pressure in the adjustment chamber so that the exhaust tappet assembly can eliminate the gap between the valve bridge and the exhaust tappet assembly under the action of the valve bridge. This solves the technical problem of valve bridge tilting that occurs when ordinary brake rocker arms are integrated with HLA functions in the prior art. On the other hand, when the solenoid valve is closed, the brake tappet assembly is reset under the action of the adjustment assembly, and the oil in the adjustment chamber and the brake chamber can return to the solenoid valve along the oil circuit, thereby realizing the reset function of the brake tappet assembly. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the rocker arm structure provided in this embodiment from a first-view perspective;

[0035] Figure 2 This embodiment provides a schematic diagram of the rocker arm structure from a second perspective.

[0036] Figure 3 for Figure 2 A cross-sectional view of AA under normal operating conditions;

[0037] Figure 4 for Figure 2 A cross-sectional view of BB under normal operating conditions;

[0038] Figure 5 for Figure 2 A cross-sectional view of CC in normal working condition;

[0039] Figure 6 for Figure 2 A cross-sectional view of AA in braking state;

[0040] Figure 7 for Figure 2 A cross-sectional view of BB in braking condition;

[0041] Figure 8 for Figure 2 A cross-sectional view of the CC in braking mode.

[0042] Icons: 010 - Rocker arm structure; 100 - Rocker arm body; 110 - Adjustment cavity; 111 - Intermediate cavity; 112 - Lower cavity; 120 - Braking cavity; 130 - Exhaust cavity; 140 - First oil passage; 150 - Second oil passage; 160 - Third oil passage; 170 - Fourth oil passage; 180 - Inlet and outlet oil passages; 190 - Shaft hole; 101 - Roller; 102 - Steel pin;

[0043] 200 - Adjusting assembly; 210 - Adjusting screw structure; 211 - Upper cavity; 212 - Adjusting screw; 213 - Plug; 214 - Third elastic element; 215 - Second spherical plug; 220 - First elastic element; 230 - Adjusting piston; 240 - Push rod; 250 - Adjusting plug; 251 - First gasket; 252 - First spherical plug; 253 - Second elastic element;

[0044] 300-Brake tappet assembly; 310-Brake piston; 311-Annular cavity; 312-Mounting cavity; 313-Brake flow channel; 320-Brake sealing element; 321-Brake spherical sealing element; 322-Second liner; 323-Fourth elastic element; 340-Fifth elastic element; 350-Snap ring; 360-Washer;

[0045] 400 - Exhaust tappet assembly; 410 - Exhaust piston; 420 - Sixth elastic element; 430 - Recess. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0048] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0049] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0050] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0051] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0052] The following describes in detail the overall structure, working principle, and technical effects of the rocker arm structure with integrated HLA function for braking provided by the present invention through embodiments and in conjunction with the accompanying drawings.

[0053] The current rocker arm structure has valve bridges at the bottom of the brake tappet and exhaust tappet; the bottom of the valve bridge is connected to both the brake valve and the exhaust valve. During normal operation, the exhaust tappet, under the action of the rocker arm structure, can simultaneously drive the valve bridge to control the opening and closing of the brake valve and the exhaust valve. The brake tappet is also connected separately to the brake valve. When braking is activated, the brake tappet independently drives the brake valve to open or close to achieve braking.

[0054] If existing brake rocker arms cannot be used with HLA technology, the following situation occurs: When the brakes are engaged, the brake-side valve opens under the action of the brake tappet, while the exhaust valve on the other side does not open. This creates a gap between the valve bridge and the brake-side valve, causing the valve bridge to tilt. Furthermore, after the valve bridge tilts, a certain gap will remain between the exhaust tappet's foot and the valve bridge. HLA technology continuously injects oil into the piston chamber to eliminate this gap, resulting in an increase in oil in the piston chamber. Consequently, the brake valve cannot close after the brakes are deactivated.

[0055] Therefore, please refer to Figures 1-2 The rocker arm structure 010 with integrated HLA function provided by the present invention is applied to a braking rocker arm and integrates braking and HLA functions.

[0056] Please refer to Figures 1-2 The present invention provides a rocker arm structure 010 with integrated braking HLA function, comprising:

[0057] The rocker arm body 100 has an adjustment chamber 110, a braking chamber 120, and an exhaust chamber 130 inside. The adjustment chamber 110 is connected to the braking chamber 120 and the exhaust chamber 130 respectively. The braking chamber 120 is connected to a solenoid valve, and the exhaust chamber 130 is connected to a hydraulic cylinder.

[0058] The system includes an adjustment assembly 200, a brake tappet assembly 300, and an exhaust tappet assembly 400. The adjustment assembly 200 is movably disposed within the adjustment chamber 110 and is used to selectively open or close the passage between the exhaust chamber 130 and the hydraulic cylinder. The brake tappet assembly 300 is movably disposed within the brake chamber 120, and the exhaust tappet assembly 400 is movably disposed within the exhaust chamber 130.

[0059] When the solenoid valve is opened, the regulating component 200 closes the passage between the exhaust chamber 130 and the oil cylinder, so that the exhaust tappet assembly 400 eliminates the gap between the valve bridge and the exhaust tappet assembly 400 under the action of the valve bridge.

[0060] When the solenoid valve is closed, the brake tappet assembly 300 is reset under the action of the adjusting assembly 200.

[0061] Understandably, when the engine is running, the oil in the cylinder can enter the exhaust chamber 130 through the rocker arm shaft, filling the exhaust chamber 130 with oil, so that the exhaust tappet assembly 400 keeps in contact with the exhaust valve; at the same time, the solenoid valve is closed, and some oil will enter the regulating chamber 110, the braking chamber 120 and the exhaust chamber 130 for lubrication.

[0062] When the engine is in braking mode, the solenoid valve opens, and the solenoid valve inputs oil into the regulating chamber 110. The oil also enters the regulating chamber 110 through the brake chamber 120. The brake tappet assembly 300 can extend under the action of the oil and contact the brake valve. When a gap is generated between the valve bridge and the exhaust tappet assembly 400, the exhaust tappet assembly 400 squeezes the oil in the exhaust chamber 130 back to the regulating assembly 200 under the action of the valve bridge. Since the regulating assembly 200 closes the passage between the exhaust chamber 130 and the cylinder, the amount of oil in the exhaust chamber 130 remains unchanged. The oil at the regulating assembly 200 will be squeezed back into the exhaust chamber 130 during the operation of the rocker arm body 100, causing the exhaust tappet assembly 400 to extend and squeeze the valve bridge to move downward. The valve bridge moves downward a distance and eliminates the gap between the valve bridge and the exhaust tappet assembly 400, that is, the valve bridge becomes horizontal. In this case, the downward movement of one end of the valve bridge is insufficient to push the valve bridge downward and open the exhaust valve and brake valve.

[0063] Furthermore, after the braking cycle, the battery valve closes, and the brake tappet assembly 300 is reset under the action of the adjusting assembly 200. The oil in the adjusting chamber 110 and the brake chamber 120 can return to the solenoid valve along the oil circuit so that the brake tappet assembly 300 can retract, that is, the brake tappet assembly 300 returns to the state of not contacting the brake valve.

[0064] As described above, this application integrates the rocker arm body 100 with the HLA function through the rocker arm body 100, the adjustment component 200, the brake tappet assembly 300, and the exhaust tappet assembly 400. The opening and closing of the braking and HLA functions are controlled by the opening and closing of the solenoid valve. On the one hand, when the solenoid valve is open, the adjustment component 200 closes the passage between the exhaust chamber 130 and the oil cylinder, maintaining the pressure in the adjustment chamber 110 so that the exhaust tappet assembly 400 can eliminate the gap between the valve bridge and the exhaust tappet assembly 400 under the action of the valve bridge. This solves the technical problem of valve bridge tilting that occurs when ordinary brake rocker arms are integrated with the HLA function in the prior art. On the other hand, when the solenoid valve is closed, the brake tappet assembly 300 is reset under the action of the adjustment component 200, and the oil in the adjustment chamber 110 and the brake chamber 120 can return to the solenoid valve along the oil path, thereby realizing the reset function of the brake tappet assembly 300.

[0065] In this embodiment, the rocker arm structure 010 includes a rocker arm body 100.

[0066] In this embodiment, please refer to Figures 3-5 The rocker arm body 100 is provided with an adjustment chamber 110, a braking chamber 120 and an exhaust chamber 130. The adjustment chamber 110 is connected to the braking chamber 120 and the exhaust chamber 130 respectively. The adjustment chamber 110 is connected to the solenoid valve and the exhaust chamber 130 is connected to the oil cylinder.

[0067] Specifically, please refer to Figures 1-2 The rocker arm body 100 is provided with a shaft hole 190 for connecting the rocker arm shaft. The rocker arm body 100 is also provided with a rolling roller 101, which is connected to the rocker arm body 100 by a steel pin 102. The roller 101 is used to contact and connect with the exhaust cam on the camshaft. The adjusting cavity 110, the braking cavity 120 and the exhaust cavity 130 are located at opposite ends of the shaft hole 190 with the roller 101.

[0068] Specifically, the exhaust cam has a base circle and an exhaust protrusion and a brake protrusion protruding along the base circle; when the camshaft drives the exhaust cam to rotate, the brake protrusion drives the rocker arm body 100 to generate a first valve lift, and the exhaust protrusion drives the rocker arm body 100 to generate a second valve lift.

[0069] In this embodiment, the rocker arm body 100 is also connected to a solenoid valve, which is connected to the braking chamber 120, and the braking chamber 120 is connected to the adjusting chamber 110. The solenoid valve is fixed to the rocker arm shaft support, which is fixed to the cylinder block. The rocker arm shaft has a rocker arm shaft passage that connects to the solenoid valve oil circuit of the rocker arm body 100. The solenoid valve can control the oil pressure of the oil entering the solenoid valve oil circuit through the rocker arm shaft oil circuit.

[0070] In this embodiment, please refer to Figures 3-4 The rocker arm structure 010 includes an adjustment assembly 200, which includes an adjustment screw structure 210, a first elastic element 220, an adjustment piston 230, and an adjustment sealing element 250. The adjustment screw structure 210, the adjustment piston 230, and the adjustment sealing element 250 are sequentially connected and disposed within the adjustment cavity 110. The adjustment piston 230 is movably disposed, with one end of the adjustment piston 230 having a gap with the adjustment screw structure 210 to form an intermediate cavity 111, which is connected to the brake cavity 120. The first elastic element 220 is located within the intermediate cavity 111, with both ends abutting against the adjustment screw structure 210 and the adjustment piston 230, respectively. The other end of the adjustment piston 230 is connected to the adjustment sealing element 250. Under the action of the first elastic element 220 and the adjustment piston 230, the adjustment sealing element 250 closes the passage between the exhaust cavity 130 and the oil cylinder to keep the oil in the exhaust cavity 130 constant.

[0071] Understandably, when the engine is running, the solenoid valve is closed. Therefore, the oil cylinder enters the lower chamber 112 through the first oil passage 140. The oil pushes the first spherical plug 252 upward and opens the passage between the first oil passage 140 and the lower chamber 112. The oil enters the exhaust chamber 130 through the lower chamber 112 and the first oil passage 140. The exhaust tappet assembly 400 extends and remains in contact with the exhaust valve.

[0072] When the engine is under braking and the solenoid valve is open, due to the large elasticity of the first adjusting element, the adjusting plug 250 opens or closes the passage between the exhaust chamber 130 and the oil cylinder under the action of the first adjusting element and the adjusting piston 230. The oil in the exhaust chamber 130 remains unchanged and does not increase. The oil pressure at the adjusting plug 250 is greater than the oil inlet pressure of the oil cylinder. Therefore, when a gap occurs between the valve bridge and the exhaust tappet assembly 400, the oil at the adjusting plug 250 will be re-pressed into the exhaust chamber 130 during the operation of the rocker arm body 100. The exhaust tappet assembly 400 can extend a certain distance to eliminate the gap between the valve bridge and the exhaust tappet assembly 400, thereby preventing the valve bridge from tilting.

[0073] It is worth mentioning that when the engine is operating normally, as the exhaust cam rotates from the base circle to the brake cam protrusion, the oil in the exhaust chamber 130 is squeezed into the lower chamber 112, simultaneously pushing the adjusting piston 230 upward until it contacts the adjusting screw 212. Since there is a gap between the adjusting piston 230 and the adjusting screw 212 forming the intermediate chamber 111, this gap can eliminate the valve lift generated by the exhaust cam rotating from the base circle to the brake cam protrusion. However, since there is a pre-existing gap between the brake tappet assembly 300 and the brake valve, and the valve lift generated by the exhaust cam rotating from the base circle to the brake cam protrusion is insufficient to eliminate this gap, the brake tappet assembly 300 cannot open the brake valve to achieve the braking function.

[0074] In this embodiment, please refer to Figures 3-4 The adjusting assembly 200 also includes a push rod 240, which is disposed in the intermediate cavity 111 and connected to the adjusting piston 230. The first elastic element 220 is sleeved on the push rod 240. The adjusting screw structure 210 has an upper cavity 211, which is connected to the brake cavity 120 and the intermediate cavity 111. When the solenoid valve is closed, the adjusting piston 230 drives the push rod 240 to move upward under the action of the oil, so that the push rod 240 opens the passage between the upper cavity 211 and the intermediate cavity 111, so that the brake tappet assembly 300 is reset.

[0075] Specifically, the adjusting piston 230 and the end of the adjusting cavity 110 away from the adjusting screw structure 210 form a lower cavity 112. The lower cavity 112 is connected to the oil cylinder through the first oil passage 140 and the lower cavity 112 is connected to the exhaust cavity 130 through the second oil passage 150.

[0076] In this embodiment, please refer to Figures 3-4 The adjusting sealing component 250 includes a first gasket 251, a first spherical plug 252, and a second elastic element 253. The first gasket 251 is disposed at one end of the lower cavity 112 near the first oil passage 140. The first spherical plug 252 is disposed on the first gasket 251 and closes the passage between the first oil passage 140 and the lower cavity 112. One end of the second elastic element 253 abuts against the adjusting piston 230, and the other end abuts against the first spherical plug 252. The elastic force of the first elastic element 220 is greater than the elastic force of the second elastic element 253.

[0077] It is understandable that the elastic force of the first elastic element 220 is greater than that of the second elastic element 253, that is, the oil pressure generated by the first elastic element 220 pushing the adjusting piston 230 is greater than the oil inlet pressure of the oil cylinder.

[0078] In this embodiment, please refer to Figures 3-4The adjusting screw structure 210 includes an adjusting screw 212, a screw plug 213, a third elastic element 214, and a second spherical plug 215. The adjusting screw 212 is threaded to the first end of the adjusting cavity 110. The screw plug 213 is threaded at the end of the adjusting screw 212 away from the adjusting piston 230 and is threaded to the adjusting screw 212. The screw plug 213 and the adjusting screw 212 form the upper cavity 211.

[0079] Specifically, the adjusting screw 212 is provided with a first opening that communicates with the upper cavity 211. The third elastic element 214 and the second spherical plug 215 are located inside the upper cavity 211. The second spherical plug 215 is fitted at the first opening. One end of the third elastic element 214 abuts against the second spherical plug 215, and the other end abuts against the inner wall of the screw plug 213. The adjusting piston 230 drives the push rod 240 to move upward under the action of the oil, so that the push rod 240 pushes open the second spherical plug 215 and opens the first opening.

[0080] In this embodiment, please refer to Figure 3 The rocker arm structure 010 includes a brake tappet assembly 300, which includes a brake piston 310 and a brake plug 320. The brake piston 310 is movably disposed within the brake chamber 120. The brake plug 320 is disposed within the brake chamber 120 and can selectively open or close the passage between the brake chamber 120 and the solenoid valve. When the solenoid valve is opened, the brake piston 310 extends.

[0081] Understandably, when the solenoid valve opens, the brake sealing component 320 opens the passage between the brake chamber 120 and the solenoid valve under the action of the oil, and the oil enters the brake chamber 120 so that the brake piston 310 extends.

[0082] In this embodiment, please refer to Figures 3-4 The outer wall of the brake piston 310 is provided with a groove, which forms an annular cavity 311 with the inner wall of the brake cavity 120. The brake piston 310 is provided with a mounting cavity 312, a second opening and a brake flow channel 313 connected in sequence. The brake flow channel 313 is connected to the annular cavity 311, the mounting cavity 312 is connected to the brake cavity 120, and the brake sealing member 320 is located in the mounting cavity 312 and is movably disposed at the second opening.

[0083] Specifically, please refer to Figure 3 and Figure 5The rocker arm body 100 is also provided with an inlet / outlet oil passage 180, a third oil passage 160 and a fourth oil passage 170. The inlet / outlet oil passage 180 is connected to the solenoid valve and the annular cavity 311. The annular cavity 311 is connected to the intermediate cavity 111 through the third oil passage 160. The brake cavity 120 is connected to the upper cavity 211 through the fourth oil passage 170. When the solenoid valve is opened, the brake sealing member 320 opens the second opening and the brake piston 310 extends. When the solenoid valve is closed, the oil in the exhaust cavity 130 returns to the regulating cavity 110, so that the regulating piston 230 moves up to open the passage between the upper cavity 211 and the intermediate cavity 111, and the brake piston 310 resets.

[0084] In this embodiment, please refer to Figure 3 and Figure 5 The brake sealing component 320 includes a brake ball seal 321, a second gasket 322, and a fourth elastic member 323. The brake ball seal 321 is located at the second opening. The second gasket 322 is engaged with the inner wall of the mounting cavity 312 and located at one end of the mounting cavity 312 away from the second opening. One end of the fourth elastic member 323 is fixedly connected to the second gasket 322, and the other end is connected to the brake ball seal 321.

[0085] The second liner 322 has an opening, and the mounting cavity 312 is connected to the braking cavity 120 through the opening.

[0086] In this embodiment, please refer to Figure 3 and Figure 5 The brake tappet assembly 300 also includes a fifth elastic element 340 and a retaining ring 350. The fifth elastic element 340 and the retaining ring 350 are sleeved on the end of the brake piston 310 away from the brake sealing element 320. The retaining ring 350 is disposed on the inner bottom wall of the brake chamber 120. One end of the fifth elastic element 340 is connected to the retaining ring 350, and the other end is engaged with the brake piston 310. When the solenoid valve is closed, the fifth elastic element 340 is reset so that the brake piston 310 retracts.

[0087] The retaining ring 350 is snapped onto the inner wall of the brake cavity 120, and a gasket 360 is provided between the retaining ring 350 and the fifth elastic element 340.

[0088] In this embodiment, please refer to Figure 4 and Figure 5 The rocker arm structure 010 includes an exhaust tappet assembly 400, which includes an exhaust piston 410, a sixth elastic member 420, and a seat 430. The exhaust piston 410 is movably disposed within the exhaust chamber 130. The sixth elastic member 420 is located within the exhaust chamber 130, with one end of the sixth elastic member 420 abutting against the exhaust piston 410 and the other end abutting against the inner top wall of the exhaust chamber 130. The seat 430 is disposed at the bottom end of the exhaust piston 410 and has a plane that contacts the valve bridge.

[0089] Optionally, the first elastic element 220, the second elastic element 253, the third elastic element 214, the fifth elastic element 340, the fourth elastic element 323, and the sixth elastic element 420 in the above embodiments can all be springs. Among them, the elastic force of the first elastic element 220 is much greater than the elastic force of the second elastic element 253.

[0090] Optionally, the first spherical plug 252, the second spherical plug 215, and the braking spherical plug 321 in the above embodiments can all be steel ball structures.

[0091] The working principle and process of the rocker arm structure 010 with integrated HLA function provided in this embodiment of the invention are as follows:

[0092] 1. When the engine is operating normally: Please refer to... Figures 3-5 The oil in the cylinder can enter the first oil passage 140 through the rocker arm shaft oil passage. The oil in the first oil passage 140 pushes the first spherical plug 252 upward, and the oil enters the lower cavity 112, the second oil passage 150 and the exhaust cavity 130 until the lower cavity 112, the second oil passage 150 and the exhaust cavity 130 are filled with oil. At this time, the exhaust piston 410 extends out of the exhaust cavity 130 under the action of the oil so that the exhaust piston 410 contacts the valve bridge.

[0093] At this time, the solenoid valve is in the closed state, and some oil will enter the inlet / outlet oil passage 180 and the brake chamber 120 for lubrication.

[0094] Under the action of the fifth elastic element 340, the brake piston 310 remains in the retracted state. At this time, there is a certain distance between the retracted brake piston 310 and the brake valve, so the retracted brake piston 310 cannot open the brake valve to exhaust air.

[0095] 2. When the engine is in braking mode:

[0096] Please refer to Figures 6-8When the battery valve is opened, the solenoid valve enters the inlet / outlet oil passage 180 through the rocker arm shaft oil passage inside the rocker arm shaft. The oil enters the annular cavity 311 and the third oil passage 160 and flows into the intermediate cavity 111. At the same time, the oil also enters the mounting cavity 312 from the annular cavity 311 and pushes the brake ball seal 321 upward and compresses the fourth elastic element 323 to open the second opening, so that the oil in the mounting cavity 312 can enter the brake cavity 120 through the second opening and the opening. At the same time, the oil in the brake cavity 120 enters the upper cavity 211 through the fourth oil passage 170. Since the second ball seal 215 is blocked at the first opening, the oil pressure in the brake cavity 120, the fourth oil passage 170, the upper cavity 211 and the intermediate cavity 111 increases. Under the action of the oil, the brake piston 310 compresses the first brake elastic element and extends one end of the brake cavity 120, that is, the brake piston 310 contacts the brake valve.

[0097] When the exhaust cam rotates from the base circle to the brake protrusion, the brake piston 310 remains extended because the oil in the brake chamber 120, the fourth oil passage 170 and the upper chamber 211 cannot be discharged, so that it can open the brake valve to achieve braking.

[0098] 3. When the engine is in braking condition, if a gap occurs between the valve bridge and the exhaust tappet assembly 400:

[0099] Please refer to Figure 4 and Figure 7 Since the adjusting sealing element 250 closes the passage between the lower cavity 112 and the first oil passage 140, the amount of oil in the exhaust cavity 130, the second oil passage 150, and the lower cavity 112 remains unchanged. At the same time, since the oil pressure generated by the first elastic element 220 pushing the adjusting piston 230 is higher than the oil inlet pressure of the oil cylinder into the first oil passage 140, under the action of the valve bridge, the exhaust tappet assembly 400 squeezes the oil in the exhaust cavity 130 back into the lower cavity 112. During the operation of the rocker arm body 100, the oil in the lower cavity 112 will be squeezed back into the exhaust cavity 130 by the first elastic element 220 and the adjusting piston 230, causing the exhaust tappet assembly 400 to extend and squeeze the valve bridge to move downward. The valve bridge moves downward a distance and eliminates the gap between the valve bridge and the exhaust tappet assembly 400, that is, the valve bridge is horizontal. In this case, the downward movement of one end of the valve bridge is insufficient to push the valve bridge downward and open the exhaust valve and brake valve.

[0100] 4. The reset process of the brake tappet assembly 300 in each braking cycle is as follows:

[0101] After braking is complete, the solenoid valve closes. When the rocker arm body 100 rotates through a certain angle, the valve bridge pushes the exhaust tappet assembly 400 upward, thereby compressing the oil in the exhaust chamber 130 and returning it to the lower chamber 112 along the first oil passage 140. The oil in the lower chamber 112 is squeezed upward and pushes the adjusting piston 230. The adjusting piston 230 drives the push rod 240 upward, which pushes the second spherical seal 215 and opens the first opening, connecting the intermediate chamber 111 and the upper chamber 211, thereby disrupting the internal sealing structure. At this time, the braking chamber 1... The oil in the brake chamber 120 enters the upper cavity 211, and the oil in the upper cavity 211 enters the middle cavity 111. The oil in the middle cavity 111 can return to the inlet and outlet oil passage 180 after passing through the third oil passage 160 and the annular cavity 311. Since the oil in the brake chamber 120 returns to the inlet and outlet oil passage 180 through the upper cavity 211 and the middle cavity 111, the reset and resetting function of the brake tappet assembly 300 is realized, which solves the technical problem in the prior art that the brake valve cannot close after the brake is closed due to the integration of ordinary brake rocker arm with HLA technology.

[0102] In summary, the rocker arm structure 010 with integrated HLA function provided in this embodiment of the invention integrates the rocker arm body 100 with the HLA function through the rocker arm body 100, the adjustment component 200, the brake tappet assembly 300, and the exhaust tappet assembly 400. The opening and closing of the braking and HLA functions are controlled by the opening or closing of the solenoid valve. On the one hand, when the solenoid valve is open, the adjustment component 200 closes the passage between the exhaust chamber 130 and the oil cylinder, maintaining the pressure in the adjustment chamber 110 so that the exhaust tappet assembly 400 can eliminate the gap between the valve bridge and the exhaust tappet assembly 400 under the action of the valve bridge. This solves the technical problem of valve bridge tilting that occurs when ordinary braking rocker arms are integrated with the HLA function in the prior art. On the other hand, when the solenoid valve is closed, the brake tappet assembly 300 is reset under the action of the adjustment component 200, and the oil in the adjustment chamber 110 and the braking chamber 120 can return to the solenoid valve along the oil path, thereby realizing the reset function of the brake tappet assembly 300.

[0103] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A rocker arm structure with integrated braking HLA function, characterized in that, include: The rocker arm body (100) is provided with an adjustment cavity (110), a braking cavity (120), and an exhaust cavity (130). The adjustment cavity (110) is connected to the braking cavity (120) and the exhaust cavity (130) respectively. The braking cavity (120) is connected to a solenoid valve, and the exhaust cavity (130) is connected to a hydraulic cylinder. The system includes an adjustment assembly (200), a brake tappet assembly (300), and an exhaust tappet assembly (400). The adjustment assembly (200) is movably disposed within the adjustment chamber (110) and is used to selectively open or close the passage between the exhaust chamber (130) and the hydraulic cylinder. The brake tappet assembly (300) is movably disposed within the brake chamber (120), and the exhaust tappet assembly (400) is movably disposed within the exhaust chamber (130). When the solenoid valve is opened, the regulating component (200) closes the passage between the exhaust chamber (130) and the oil cylinder, so that the exhaust tappet assembly (400) eliminates the gap between the valve bridge and the exhaust tappet assembly (400) under the action of the valve bridge. When the solenoid valve is closed, the brake tappet assembly (300) is reset by the action of the adjusting assembly (200).

2. The rocker arm structure with integrated braking HLA function according to claim 1, characterized in that, The adjustment assembly (200) includes an adjustment screw structure (210), a first elastic element (220), an adjustment piston (230), and an adjustment plug (250). The adjustment screw structure (210), the adjustment piston (230), and the adjustment plug (250) are sequentially connected and disposed in the adjustment cavity (110). The adjusting piston (230) is movably configured. One end of the adjusting piston (230) has a gap with the adjusting screw structure (210) and forms an intermediate cavity (111). The intermediate cavity (111) is connected to the braking cavity (120). The first elastic member (220) is located in the intermediate cavity (111) and its two ends abut against the adjusting screw structure (210) and the adjusting piston (230) respectively. The other end of the adjusting piston (230) is connected to the adjusting sealing member (250). The regulating sealing member (250) closes the passage between the exhaust chamber (130) and the oil cylinder under the action of the first elastic member (220) and the regulating piston (230) to keep the oil in the exhaust chamber (130) unchanged.

3. The rocker arm structure with integrated braking HLA function according to claim 2, characterized in that, The adjustment assembly (200) further includes a push rod (240), which is disposed in the intermediate cavity (111) and connected to the adjustment piston (230). The first elastic element (220) is sleeved on the push rod (240). The adjustment screw structure (210) is provided with an upper cavity (211), which is connected to the brake cavity (120). The upper cavity (211) is connected to the intermediate cavity (111). When the solenoid valve is closed, the regulating piston (230) drives the push rod (240) to move upward under the action of the oil, so that the push rod (240) opens the passage between the upper cavity (211) and the middle cavity (111), so that the brake tappet assembly (300) is reset.

4. The rocker arm structure with integrated braking HLA function according to claim 3, characterized in that, The adjusting piston (230) and the adjusting cavity (110) at the end away from the adjusting screw structure (210) form a lower cavity (112). The lower cavity (112) is connected to the oil cylinder through the first oil passage (140), and the lower cavity (112) is connected to the exhaust cavity (130) through the second oil passage (150). The adjusting plug (250) includes a first gasket (251), a first spherical plug (252), and a second elastic member (253). The first gasket (251) is disposed at one end of the lower cavity (112) near the first oil passage (140). The first spherical plug (252) is disposed on the first gasket (251) and closes the passage between the first oil passage (140) and the lower cavity (112). One end of the second elastic member (253) abuts against the adjusting piston (230), and the other end abuts against the first spherical plug (252). The elastic force of the first elastic member (220) is greater than the elastic force of the second elastic member (253).

5. The rocker arm structure with integrated braking HLA function according to claim 4, characterized in that, The adjusting screw structure (210) includes an adjusting screw (212), a screw plug (213), a third elastic element (214), and a second spherical plug (215). The adjusting screw (212) is threaded to the first end of the adjusting cavity (110). The screw plug (213) is threaded at the end of the adjusting screw (212) away from the adjusting piston (230) and is threaded to the adjusting screw (212). The screw plug (213) and the adjusting screw (212) form the upper cavity (211). The adjusting screw (212) is provided with a first opening that communicates with the upper cavity (211). The third elastic element (214) and the second spherical plug (215) are located inside the upper cavity (211). The second spherical plug (215) is fitted at the first opening. One end of the third elastic element (214) abuts against the second spherical plug (215), and the other end abuts against the inner wall of the screw plug (213). The adjusting piston (230) drives the push rod (240) to move upward under the action of the oil, so that the push rod (240) pushes open the second spherical plug (215) and opens the first opening.

6. The rocker arm structure with integrated braking HLA function according to claim 3, characterized in that, The brake tappet assembly (300) includes a brake piston (310) and a brake plug (320). The brake piston (310) is movably disposed within the brake chamber (120). The brake plug (320) is disposed within the brake chamber (120) and can selectively open or close the passage between the brake chamber (120) and the solenoid valve. The solenoid valve opens, and the brake piston (310) extends.

7. The rocker arm structure with integrated braking HLA function according to claim 6, characterized in that, The outer wall of the brake piston (310) is provided with a groove, and the groove and the inner wall of the brake cavity (120) form an annular cavity (311); the brake piston (310) is provided with a mounting cavity (312), a second opening and a brake flow channel (313) connected in sequence, the brake flow channel (313) is connected to the annular cavity (311), the mounting cavity (312) is connected to the brake cavity (120), and the brake sealing member (320) is located in the mounting cavity (312) and is movably disposed at the second opening; The rocker arm body (100) is also provided with an inlet / outlet oil passage (180), a third oil passage (160) and a fourth oil passage (170). The inlet / outlet oil passage (180) connects the solenoid valve and the annular cavity (311). The annular cavity (311) is connected to the intermediate cavity (111) through the third oil passage (160). The braking cavity (120) is connected to the upper cavity (211) through the fourth oil passage (170). When the solenoid valve is opened, the brake sealing member (320) opens the second opening, and the brake piston (310) extends; when the solenoid valve is closed, the oil in the exhaust chamber (130) returns to the regulating chamber (110), so that the regulating piston (230) moves upward to open the passage between the upper chamber (211) and the intermediate chamber (111), and the brake piston (310) resets.

8. The rocker arm structure with integrated braking HLA function according to claim 7, characterized in that, The brake sealing component (320) includes a brake ball seal (321), a second gasket (322), and a fourth elastic element (323). The brake ball seal (321) is located at the second opening. The second gasket (322) is engaged with the inner wall of the mounting cavity (312) and located at one end of the mounting cavity (312) away from the second opening. One end of the fourth elastic element (323) is fixedly connected to the second gasket (322), and the other end is connected to the brake ball seal (321). The second pad (322) has an opening, and the mounting cavity (312) communicates with the braking cavity (120) through the opening.

9. The rocker arm structure with integrated braking HLA function according to claim 6, characterized in that, The brake tappet assembly (300) further includes a fifth elastic element (340) and a retaining ring (350), the fifth elastic element (340) and the retaining ring (350) being sleeved on the end of the brake piston (310) away from the brake plug (320); The snap ring (350) is disposed on the inner bottom wall of the brake cavity (120). One end of the fifth elastic element (340) is connected to the snap ring (350), and the other end is engaged with the brake piston (310). When the solenoid valve is closed, the fifth elastic element (340) is reset so that the brake piston (310) retracts.

10. The rocker arm structure with integrated braking HLA function according to claim 1, characterized in that, The exhaust tappet assembly (400) includes an exhaust piston (410), a sixth elastic element (420), and a recess (430). The exhaust piston (410) is movably disposed within the exhaust chamber (130). The sixth elastic element (420) is located within the exhaust chamber (130). One end of the sixth elastic element (420) abuts against the exhaust piston (410), and the other end abuts against the inner top wall of the exhaust chamber (130). The recess (430) is disposed at the bottom end of the exhaust piston (410).

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