A roller-type rocker arm mechanism and its usage method

Abstract

This invention relates to the field of engine technology, specifically to a roller-type rocker arm mechanism and its usage method. The mechanism includes a hood support frame with a horizontal rocker arm shaft at its center. It also includes a valve rocker arm rotatably mounted on the outside of the horizontal rocker arm shaft. The valve rocker arm has a valve pushrod and a contact roller at its front and rear ends, respectively. An inclined contact surface is arranged around the outer surface of the contact roller. This invention uses a C-type clamp to drive a drive cam to slide horizontally along a horizontal camshaft, adjusting its position. This allows adjustment of the inclined contact point between the drive cam and the contact roller, controlling the distance the drive cam moves with each rotation of the contact roller. This, in turn, controls the swing amplitude of the valve rocker arm, i.e., the engine valve movement distance, for synchronous adjustment. This enables real-time dynamic adjustment of valve lift during engine operation to achieve optimal engine efficiency.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and in particular to a roller-type rocker arm mechanism and its method of use. Background Technology

[0002] When an engine is working, it needs a valve timing mechanism to draw in air and expel exhaust gas. The valve timing mechanism opens and closes the intake and exhaust valves of the engine cylinders according to certain time limits based on engine operation. The most important part of the valve timing mechanism is the valve rocker arm structure. The valve rocker arm can directly control the opening and closing of the valve and the amount of valve opening and closing, i.e., valve lift. The required valve lift is different at different engine speeds. At present, the National VI emission standard for motor vehicles stipulates a new stage of emission standards for automobiles. Only by achieving the best working efficiency of the engine can the emissions of automobiles be reduced to the greatest extent. The appropriate speed and the appropriate lift are necessary to achieve the best working efficiency of the engine.

[0003] Patent application CN201510004055.4 discloses a valve rocker arm for an automotive engine, comprising a rocker arm body with a shaft hole that mates with the main shaft clearance. One end of the rocker arm body has a push rod for adjusting valve clearance by pressing against a valve push rod, and the other end of the rocker arm body has a roller for contacting the engine crankshaft cam. The push rod is threaded into the threaded hole at one end of the rocker arm body, and the lower end of the push rod has a ball head with a pad on it. The upper surface of the pad has a concave arc surface that matches the shape and size of the ball head. A connecting bracket is provided between the pad and the lower end of the push rod, with the upper end of the connecting bracket slidably fitted onto the lower end of the push rod, and a swing gap between the upper end of the connecting bracket and the lower end of the push rod. The lower end of the connecting bracket is connected to the outer wall of the pad. This valve rocker arm for an automotive engine is not easily worn, has a long service life, low noise, and maintains constant contact with the valve push rod.

[0004] However, when adjusting its valve lift, it still needs to be manually turned during engine maintenance, and cannot be dynamically adjusted in real time as needed while the engine is running, resulting in low flexibility in its use. Summary of the Invention

[0005] In view of this, the purpose of this invention is to propose a roller-type rocker arm mechanism and its usage method to solve the problem that current engine valve rocker arm mechanisms still require manual adjustment during engine maintenance when adjusting valve travel, and cannot be dynamically adjusted in real time as needed while the engine is running, resulting in low flexibility of use.

[0006] To achieve the above objectives, the present invention provides a roller-type rocker arm mechanism, including a cover support frame, wherein a horizontal rocker arm shaft is disposed in the middle of the cover support frame, and further comprising:

[0007] A valve rocker arm is rotatably mounted on the outside of the horizontal rocker arm shaft. A valve push rod and a contact roller are respectively provided at the front and rear ends of the valve rocker arm. An inclined contact surface is provided around the outer wheel surface of the contact roller.

[0008] A horizontal camshaft is arranged parallel to the rear side of the horizontal rocker arm shaft. Multiple polygonal drive shafts are evenly spaced in the middle of the horizontal camshaft. Drive cams are nested and slidably arranged on the outer side of the polygonal drive shafts. The drive cams are arranged in one-to-one correspondence with the valve rocker arms. An inclined drive surface is arranged around the outer wheel surface of the drive cam. The drive cam contacts the contact roller through the inclined drive surface and the inclined contact surface.

[0009] A fixed adjustment bracket is disposed on the rear side of the horizontal camshaft. A C-shaped clamping card is horizontally slidably disposed in the middle of the fixed adjustment bracket. A hollow connecting sleeve is symmetrically disposed at the front end of the C-shaped clamping card. The hollow connecting sleeve is symmetrically disposed on the left and right sides of the drive cam. The C-shaped clamping card is horizontally slidably connected to the horizontal camshaft through the hollow connecting sleeve. The C-shaped clamping card is disposed in a one-to-one correspondence with the drive cam.

[0010] In some alternative embodiments, an adjusting screw is provided on the inner side of the fixed adjusting frame. The adjusting screw is arranged parallel to the horizontal camshaft. An adjusting motor is provided at the shaft end of the adjusting screw. An adjusting sleeve is provided at the rear end of the C-type clamp. The C-type clamp is connected to the adjusting screw through the adjusting sleeve.

[0011] In some alternative embodiments, a camshaft support is provided between the horizontal camshaft and the hood support frame, the horizontal camshaft and the camshaft support are rotatably connected, and a plurality of limiting flanges are provided in the middle of the horizontal camshaft, the limiting flanges being placed on the front and rear sides of the camshaft support to provide limiting for the horizontal camshaft.

[0012] The rocker arm mechanism drives a drive cam to rotate via a horizontal camshaft, which in turn drives the rocker arm to swing, thereby moving the engine valves to control the engine's intake and exhaust. By horizontally moving the C-type clamp, the drive cam can slide horizontally along the horizontal camshaft to adjust its position. This allows adjustment of the angled contact point between the drive cam and the contact roller, i.e., the radius of the contact point, to control the swing amplitude of the rocker arm, thus synchronously adjusting the engine valve movement distance and valve lift. The adjustment mechanism is further enhanced by a motor-driven adjusting screw that rotates, which in turn drives the C-type clamp via an adjusting sleeve. The C-type clamp moves to adjust the valve lift, and each C-type clamp is set one-to-one with the drive cam, so each drive cam and the corresponding valve rocker arm can be adjusted individually. This allows for individual control and adjustment of the valve of each cylinder of the engine, making the adjustment more precise and flexible. The C-type clamp drives the drive cam to slide horizontally along the horizontal camshaft to adjust its position. The horizontal camshaft is positioned on the front and rear sides of the camshaft support by limiting flanges to provide a limit for the horizontal camshaft, preventing the horizontal camshaft from sliding and improving the stability of the rocker arm mechanism during operation.

[0013] In some optional embodiments, a rocker arm bushing is provided at the center of the valve rocker arm, the valve rocker arm is rotatably connected to the horizontal rocker arm shaft through the valve rocker arm, an inter-shaft oil reservoir ring is provided in the middle of the rocker arm bushing, a hollow oil supply pipe is provided inside the horizontal rocker arm shaft, an inter-shaft delivery hole is provided on the surface of the horizontal rocker arm shaft, the inter-shaft delivery hole is provided in a one-to-one correspondence with the valve rocker arm, the inter-shaft oil reservoir ring and the hollow oil supply pipe are interconnected through the inter-shaft delivery hole, and lubrication delivery pipes are provided on both the front and rear sides of the inter-shaft oil reservoir ring.

[0014] In some alternative embodiments, a central connecting shaft is provided at the center of the contact roller, and the contact roller is rotatably connected to the valve rocker arm through the central connecting shaft. The outer end opening of the lubrication delivery pipe provided near the side of the contact roller is located inside the contact roller.

[0015] In some alternative embodiments, a detection magnet is provided in the middle of the contact roller, and a Hall detector and a laser rangefinder are provided on the rear side of the cover support frame, with the Hall detector and the laser rangefinder corresponding one-to-one with the contact roller.

[0016] In some optional embodiments, an oil reservoir sleeve is provided inside the valve pushrod, and a connecting opening is provided in the middle of the oil reservoir sleeve. A lubrication delivery pipe provided near the valve pushrod is connected to the oil reservoir sleeve through the connecting opening. A buffer piston is nested and slidably arranged inside the oil reservoir sleeve. A spherical fitting groove is provided at the bottom of the buffer piston. A contact steel ball is rotatably fitted inside the spherical fitting groove. A connecting delivery pipe is provided in the middle of the buffer piston. The spherical fitting groove is connected to the oil reservoir sleeve through the connecting delivery pipe. Multiple oil guide slots are evenly arranged around the middle of the spherical fitting groove.

[0017] In some alternative embodiments, an engine valve is provided below the valve pushrod, a hollow sleeve is provided inside the engine valve, a limit end is provided at the top of the engine valve, and a valve spring is provided below the limit end.

[0018] In some optional embodiments, a contact pressure plate is rotatably provided in the middle of the limiting end, the top surface of the contact pressure plate is provided with an arc-shaped contact surface, the bottom surface of the contact pressure plate is provided with a one-way drive ratchet, a spiral drive rod is provided below the one-way drive ratchet, and a fixing screw sleeve is nested on the outside of the spiral drive rod, and the fixing screw sleeve is fixedly connected to the cover support frame.

[0019] A method of using a roller-type rocker arm mechanism includes the following steps:

[0020] The horizontal camshaft drives the drive cam to rotate, which in turn drives the valve rocker arm to reciprocate along the horizontal rocker arm axis via a contact roller. When the valve rocker arm swings to one side, it pushes the engine valve downward through the valve push rod to open the valve. When the rocker arm swings to the other side, the valve spring pushes the engine valve to reset and close the valve, thus controlling the intake and exhaust of the engine. The C-type clamp moves the drive cam horizontally along the horizontal camshaft to adjust its position, adjusting the radius of the inclined contact point between the drive cam and the contact roller. This controls the distance the drive cam moves with each rotation of the contact roller, thereby controlling the swing amplitude of the valve rocker arm. This synchronously adjusts the valve lift and the distance the engine valve moves, achieving real-time dynamic adjustment of the valve lift as needed during engine operation to achieve optimal engine efficiency.

[0021] As can be seen from the above description, the roller-type rocker arm mechanism and its usage method provided by the present invention control the movement of the engine valves through the valve rocker arm to control the intake and exhaust of the engine. The swing of the valve rocker arm is driven by a drive cam driven by a horizontal camshaft. When the drive cam rotates, it drives the valve rocker arm to swing back and forth through a contact roller set at the rear end of the valve rocker arm. The outer wheel surfaces of both the drive cam and the contact roller are inclined structures. The drive cam contacts the contact roller through the inclined drive surface and the inclined contact surface. The drive cam is nested and slidably set on the horizontal camshaft. The position of the drive cam can be adjusted by a C-type clamping card, which can drive the drive cam to slide horizontally along the horizontal camshaft. This allows adjustment of the inclined contact point between the drive cam and the contact roller, i.e., the radius of the contact point, thereby controlling the distance the drive cam moves with each rotation of the contact roller, and thus controlling the swing amplitude of the valve rocker arm. That is, the valve lift of the engine valve is adjusted synchronously, so as to realize the real-time dynamic adjustment of the valve lift as needed during engine operation, so as to achieve the best working efficiency of the engine and make it more flexible in use. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the rear structure according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the front structure of an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the longitudinal cross-sectional structure of an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the valve rocker arm according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the fixed adjustment frame according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the C-type clamping card according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the valve lifter structure according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of an engine valve according to an embodiment of the present invention.

[0031] The diagram is marked as follows:

[0032] 1. Engine cover support frame; 101. Horizontal rocker arm shaft; 102. Hollow oil supply pipe; 103. Inter-shaft delivery hole; 104. Hall effect detector; 105. Laser rangefinder; 2. Valve rocker arm; 201. Rocker arm bushing; 202. Inter-shaft oil reservoir ring; 203. Lubrication delivery pipe; 3. Contact roller; 301. Central connecting shaft; 302. Inclined contact surface; 303. Detection magnet; 4. Valve pushrod; 401. Oil reservoir sleeve; 402. Connecting opening; 403. Buffer piston; 404. Connecting delivery pipe; 405. Spherical fitting groove; 406. Oil guide slot; 4 7. Contact steel ball; 5. Horizontal camshaft; 501. Multi-sided drive shaft; 502. Drive cam; 503. Inclined drive surface; 504. Camshaft support; 505. Limiting flange; 6. Fixed adjustment bracket; 601. Adjusting screw; 602. Adjusting motor; 603. C-type clamp; 604. Hollow connecting sleeve; 605. Adjusting screw sleeve; 7. Engine valve; 701. Limiting end; 702. Valve spring; 703. Contact pressure plate; 704. Arc-shaped contact surface; 705. One-way drive ratchet; 706. Helical drive rod; 707. Fixed screw sleeve. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0034] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a roller-type rocker arm mechanism includes a cover support frame 1, a horizontal rocker arm shaft 101 disposed in the middle of the cover support frame 1, and further includes:

[0036] The valve rocker arm 2 is rotatably mounted on the outside of the horizontal rocker arm shaft 101. The front and rear ends of the valve rocker arm 2 are respectively provided with valve push rod 4 and contact roller 3. The outer wheel surface of the contact roller 3 is surrounded by an inclined contact surface 302.

[0037] A horizontal camshaft 5 is arranged parallel to the rear side of the horizontal rocker arm shaft 101. Multiple polygonal drive shafts 501 are evenly spaced in the middle of the horizontal camshaft 5. Drive cams 502 are nested and slidably arranged on the outer side of the polygonal drive shafts 501. The drive cams 502 are arranged in a one-to-one correspondence with the valve rocker arms 2. An inclined drive surface 503 is arranged around the outer wheel surface of the drive cam 502. The drive cam 502 contacts the contact roller 3 through the inclined drive surface 503 and the inclined contact surface 302.

[0038] A fixed adjustment bracket 6 is located on the rear side of the horizontal camshaft 5. A C-shaped clamping card 603 is horizontally slidably arranged in the middle of the fixed adjustment bracket 6. A hollow connecting sleeve 604 is symmetrically arranged at the front end of the C-shaped clamping card 603. The hollow connecting sleeve 604 is symmetrically arranged on the left and right sides of the drive cam 502. The C-shaped clamping card 603 is horizontally slidably connected to the horizontal camshaft 5 through the hollow connecting sleeve 604. The C-shaped clamping card 603 and the drive cam 502 are arranged in a one-to-one correspondence.

[0039] In this embodiment, the rocker arm mechanism controls the movement of the engine valve 7 via the valve rocker arm 2 to control the engine's intake and exhaust. The swing of the valve rocker arm 2 is driven by the drive cam 502 driven by the horizontal camshaft 5. When the drive cam 502 rotates, it drives the valve rocker arm 2 to swing back and forth via the contact roller 3 set at the rear end of the valve rocker arm 2. The swing amplitude of the valve rocker arm 2 determines the movement distance of the engine valve 7, i.e., the valve lift. Therefore, by controlling the swing amplitude of the valve rocker arm 2, the valve lift of the engine can be controlled. The outer wheel surfaces of the drive cam 502 and the contact roller 3 are both inclined structures. The drive cam 502 contacts the contact roller 3 through the inclined drive surface 503 and the inclined contact surface 302. Therefore, both the drive cam 502 and the contact roller 3 have a minimum radius and a maximum radius. The drive cam 502 is nested and slidably mounted on the horizontal camshaft 5. At the same time, the C-type clamp 603 can clamp the valve through the hollow connecting sleeve 604 symmetrically set at the front end. The corresponding drive cam 502 is held, and the C-type clamp 603 is horizontally slidably connected to the horizontal camshaft 5 through the hollow connecting sleeve 604. At the same time, the hollow connecting sleeve 604 and the C-type clamp 603 are rotatably connected. Therefore, by moving the C-type clamp 603 horizontally, the drive cam 502 can be driven to slide horizontally along the horizontal camshaft 5 to adjust its position. This allows adjustment of the inclined contact point between the drive cam 502 and the contact roller 3, i.e., the radius of the contact point. This allows control over the distance the drive cam 502 drives the contact roller 3 to move with each rotation. The larger the radius of the contact point, the greater the swing of the valve rocker arm 2, and vice versa. This allows control over the swing amplitude of the valve rocker arm 2, i.e., synchronous adjustment of the valve lift and movement distance of the engine valve 7. This enables real-time dynamic adjustment of the valve lift as needed during engine operation to achieve optimal engine efficiency. It also allows for stepless adjustment, providing greater flexibility during use.

[0040] As one implementation method, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, preferably, an adjusting screw 601 is provided on the inner side of the fixed adjusting bracket 6. The adjusting screw 601 is arranged parallel to the horizontal camshaft 5. An adjusting motor 602 is provided at the shaft end of the adjusting screw 601. An adjusting sleeve 605 is provided at the rear end of the C-type clamp 603. The C-type clamp 603 is connected to the adjusting screw 601 through the adjusting sleeve 605. A camshaft support 504 is provided between the horizontal camshaft 5 and the cover support frame 1. The horizontal camshaft 5 is rotatably connected to the camshaft shaft 5. Multiple limiting flanges 505 are provided in the middle of the camshaft 5. These limiting flanges 505 are positioned on the front and rear sides of the camshaft support 504 to provide limiting for the horizontal camshaft 5. The rocker arm mechanism drives the drive cam 502 to rotate via the horizontal camshaft 5, thereby driving the valve rocker arm 2 to swing, which in turn drives the engine valve 7 to move, controlling the engine's intake and exhaust. The drive cam 502 can be horizontally slid along the horizontal camshaft 5 by horizontally moving the C-type clamp 603. The position allows adjustment of the tilting contact point between the drive cam 502 and the contact roller 3, i.e., the radius of the contact point, to control the swing amplitude of the valve rocker arm 2, i.e., to synchronously adjust the movement distance and valve lift of the engine valve 7. The adjustment screw 601 is driven to rotate by the adjustment motor 602, which in turn drives the C-type clamp 603 to move through the adjustment sleeve 605, thus adjusting the valve lift. Each C-type clamp 603 is set one-to-one with the drive cam 502, so each drive cam 502 and the corresponding valve rocker arm 2 can be adjusted individually, thereby achieving individual control and adjustment of the valve of each cylinder of the engine. The adjustment and control are more precise and flexible. The C-type clamp 603 drives the drive cam 502 to slide horizontally along the horizontal camshaft 5 to adjust its position. The horizontal camshaft 5 is placed on the front and rear sides of the camshaft support 504 by the limiting flange 505 to provide a limit for the horizontal camshaft 5, preventing the horizontal camshaft 5 from sliding and improving the stability of the rocker arm mechanism during operation.

[0041] As one implementation method, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, preferably, a rocker arm sleeve 201 is provided at the center of the valve rocker arm 2. The valve rocker arm 2 is rotatably connected to the horizontal rocker arm shaft 101 via the valve rocker arm 2. An inter-shaft oil reservoir ring 202 is provided in the middle of the rocker arm sleeve 201. A hollow oil supply pipe 102 is provided inside the horizontal rocker arm shaft 101. An inter-shaft delivery hole 103 is provided on the surface of the horizontal rocker arm shaft 101. The inter-shaft delivery hole 103 is provided one-to-one with the valve rocker arm 2. The inter-shaft oil reservoir ring 202 and the hollow oil supply pipe 102 are interconnected through the inter-shaft delivery hole 103. Lubrication delivery pipes 203 are provided on both the front and rear sides of the inter-shaft oil reservoir ring 202. A central connecting shaft 301 is provided at the center of the contact roller 3. The contact roller 3 is rotatably connected to the valve rocker arm 2 via the central connecting shaft 301. The outer end of the lubrication delivery pipe 203 provided near the contact roller 3 is open. Located inside the contact roller 3, the rocker arm mechanism drives the drive cam 502 to rotate via the horizontal camshaft 5, thereby driving the swing of the valve rocker arm 2 and moving the engine valve 7 to control the engine's intake and exhaust. The valve rocker arm 2 is equipped with an oil passage structure to provide lubrication. Lubricating oil can be delivered to the inter-shaft oil reservoir ring 202 on each valve rocker arm 2 through the hollow oil supply pipe 102 and the inter-shaft delivery hole 103 to lubricate the rocker arm bushing 201 of the valve rocker arm 2, reducing the wear of the rocker arm bushing 201. At the same time, the lubricating oil delivered to the inter-shaft oil reservoir ring 202 can be further delivered to the contact roller 3 through the lubrication delivery pipe 203 to lubricate the surface of the contact roller 3, thereby reducing the wear of the contact point between the contact roller 3 and the drive cam 502, which is beneficial to improving the service life and stability of the rocker arm mechanism.

[0042] In one preferred embodiment, a detection magnet 303 is disposed in the middle of the contact roller 3, and a Hall detector 104 and a laser rangefinder 105 are disposed on the rear side of the hood support frame 1. The Hall detector 104 and the laser rangefinder 105 are disposed one-to-one with the contact roller 3. The rocker arm mechanism drives the drive cam 502 to rotate via the horizontal camshaft 5 to drive the swing of the valve rocker arm 2, thereby driving the engine valve 7 to move, so as to control the intake and exhaust of the engine. The detection magnet 303 is disposed in the middle of the contact roller 3. When the contact roller 3 rotates, the distance between the detection magnet 303 and the fixed Hall detector 104 will change. Thus, the rotational speed of the contact roller 3 can be detected by the Hall detector 104, so the contact roller can be monitored. The rotation of the contact roller 3 is monitored in real time, which can detect when the contact roller 3 is stuck or rotates abnormally, so as to facilitate maintenance and avoid excessive wear caused by the contact roller 3 being stuck or rotating abnormally, which could damage the rocker arm mechanism and affect engine operation. In addition, the laser rangefinder 105 can detect the position of the contact roller 3 and the moving distance of the contact roller 3, i.e. the swing amplitude of the valve rocker arm 2, so as to realize the detection of valve lift, so as to adjust it according to actual needs. Furthermore, the distance between the contact roller 3 and the laser rangefinder 105 at a fixed position can be measured to detect the wear degree of the contact roller 3. When the contact roller 3 is worn more, the distance will increase, which facilitates real-time maintenance and makes it more convenient and flexible to use.

[0043] As one implementation method, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, preferably, an oil reservoir sleeve 401 is provided inside the valve pushrod 4. A connecting opening 402 is provided in the middle of the oil reservoir sleeve 401. A lubrication delivery pipe 203 located near the valve pushrod 4 is connected to the oil reservoir sleeve 401 through the connecting opening 402. A buffer piston 403 is nested and slidably arranged inside the oil reservoir sleeve 401. A spherical fitting groove 405 is provided at the bottom of the buffer piston 403. A contact steel ball 407 is rotatably fitted inside the spherical fitting groove 405. A connecting delivery pipe 404 is provided in the middle of the buffer piston 403. The spherical fitting groove 405 is connected to the oil reservoir sleeve 401 through the connecting delivery pipe 404. Multiple oil guide slots 406 are evenly arranged around the center of the fitting groove 405. An engine valve 7 is located below the valve pusher 4. A hollow sleeve is installed inside the engine valve 7. A limit end 701 is located at the top of the engine valve 7, and a valve spring 702 is located below the limit end 701. The rocker arm mechanism drives the drive cam 502 to rotate via the horizontal camshaft 5, thereby driving the rocker arm 2 to swing. When the rocker arm 2 swings to one side, it presses the engine valve 7 downward through the valve pusher 4 to open the valve. When the rocker arm mechanism swings to the other side, the valve spring 702 pushes the engine valve 7 to reset and close the valve, thus achieving the desired valve position. The engine's intake and exhaust are controlled by the valve pusher 4, which presses the engine valve 7 via a contact ball 407. The contact ball 407 is fitted onto the buffer piston 403 of the valve pusher 4 through a spherical fitting groove 405. Lubricating oil can be delivered to the oil reservoir 401 through the lubrication delivery pipe 203 and the connecting opening 402. Thus, the oil reservoir 401 and the buffer piston 403 inside the valve pusher 4 form a hydraulic buffer structure. When the valve pusher 4 presses the engine valve 7, the contact ball 407 pushes the buffer piston 403 in the opposite direction, so that the lubricating oil in the oil reservoir 401 can provide buffering, preventing friction between the valve pusher 4 and the engine valve 7. The collision reduces the impact force between the two, which helps to improve the service life of the engine valve 7 and valve pushrod 4. This hydraulic buffer structure can also provide a certain amount of clearance buffer when adjusting the valve lift, preventing the valve from failing to close. At the same time, when the contact steel ball 407 pushes the buffer piston 403 in the opposite direction, the lubricating oil in the oil reservoir sleeve 401 can overflow through the oil guide slit 406, spraying the lubricating oil below the contact steel ball 407 to lubricate the contact steel ball 407 and the top of the valve pushrod 4, further reducing their wear. Meanwhile, the valve pushrod 4 and the valve rocker arm 2 are connected by a threaded screw, which facilitates adjustment during engine maintenance.

[0044] As one implementation method, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, preferably, a contact pressure plate 703 is rotatably provided in the middle of the limiting end 701. The top surface of the contact pressure plate 703 is provided with an arc-shaped contact surface 704, and the bottom surface of the contact pressure plate 703 is provided with a one-way drive ratchet 705. A spiral drive rod 706 is provided below the one-way drive ratchet 705. A fixing screw sleeve 707 is nested on the outer side of the spiral drive rod 706. The fixing screw sleeve 707 is fixedly connected to the engine cover support frame 1. When the rocker arm mechanism swings towards the valve side, it presses the engine valve 7 downward through the valve push rod 4 to open the valve. The valve push rod 4 presses the engine valve 7 through the contact steel ball 407. The contact steel ball 407 and the engine valve 7 are connected by the contact pressure plate 703. The contact plate 703 contacts the contact ball 407 via an arc-shaped contact surface 704 on its top surface, which reduces contact friction. Simultaneously, when the engine valve 7 moves downwards, the helical drive rod 706 is driven to rotate by the fixing sleeve 707. The helical drive rod 706 then drives the contact plate 703 to rotate via a one-way drive ratchet 705. This means that each time the engine valve 7 moves downwards, the contact plate 703 rotates by an angle, preventing the arc-shaped contact surface 704 and the contact ball 407 from maintaining the same contact position. This allows the arc-shaped contact surface 704 to repeatedly contact the contact ball 407, preventing continuous wear at a single location and improving overall service life.

[0045] In operation, the engine equipped with the rocker arm mechanism drives the horizontal camshaft 5 to rotate via the timing structure. The horizontal camshaft 5, in turn, drives the drive cam 502 to rotate. The drive cam 502 drives the valve rocker arm 2 to reciprocate along the horizontal rocker arm shaft 101 via the contact roller 3. When the valve rocker arm 2 swings to one side of the valve, it pushes the engine valve 7 downward through the valve push rod 4 to open the valve. When the valve push rod 4 pushes the engine valve 7, it contacts the engine valve 7 through the contact ball 407 and the contact pressure plate 703. When the engine valve 7 moves downward, the helical drive rod 706 is driven to rotate by the fixing sleeve 707. In turn, the helical drive rod 706 drives the contact pressure plate 703 to rotate through the one-way drive ratchet 705. At the same time, the contact ball 407 pushes the buffer piston 403 in the opposite direction. The lubricating oil in the oil reservoir sleeve 401 provides buffering, preventing the valve push rod 4 from colliding with the engine valve 7 and reducing the impact force between them. The lubricating oil overflows through the oil guide slit 406, spraying the lubricating oil below the contact steel ball 407 to lubricate the contact steel ball 407 and the contact pressure plate 703. Then, when the rocker arm mechanism swings to the other side, the valve spring 702 pushes the engine valve 7 to reset and close the valve, thereby controlling the intake and exhaust of the engine. When the valve lift needs to be adjusted, the adjusting motor 602 drives the adjusting screw 601 to rotate, and the adjusting screw 601 drives the C-type clamp 603 to move horizontally through the adjusting screw sleeve 605. The C-type clamp 603 drives the driving cam 502 to slide horizontally along the horizontal camshaft 5 to adjust its position, adjusting the inclined contact point between the driving cam 502 and the contact roller 3, that is, the radius of the contact point, and controlling the distance that the driving cam 502 drives the contact roller 3 to move each time it rotates, so as to control the swing amplitude of the valve rocker arm 2, and realize the synchronous adjustment of the movement distance and valve lift of the engine valve 7 to achieve the best working efficiency of the engine.

[0046] A method of using a roller-type rocker arm mechanism includes the following steps:

[0047] The horizontal camshaft 5 drives the drive cam 502 to rotate. The drive cam 502 drives the valve rocker arm 2 to swing back and forth along the horizontal rocker arm shaft 101 via the contact roller 3. When the valve rocker arm 2 swings to one side of the valve, the valve push rod 4 presses the engine valve 7 downward to open the valve. When the rocker arm mechanism swings to the other side, the valve spring 702 pushes the engine valve 7 to reset to close the valve, thus realizing the control of the engine's intake and exhaust. The translational C-type clamp 603 drives the drive cam 502 to slide horizontally along the horizontal camshaft 5 to adjust its position. The tilting contact point between the drive cam 502 and the contact roller 3, i.e., the radius of the contact point, is adjusted to control the distance that the drive cam 502 drives the contact roller 3 to move with each rotation, thereby controlling the swing amplitude of the valve rocker arm 2. The movement distance of the engine valve 7 and the valve lift are adjusted synchronously, so that the valve lift can be dynamically adjusted in real time according to the needs during engine operation to achieve the best working efficiency of the engine.

[0048] The roller-type rocker arm mechanism and its usage method provided by this invention control the movement of engine valves 7 via valve rocker arm 2 to control engine intake and exhaust. The swing of valve rocker arm 2 is driven by a drive cam 502 driven by a horizontal camshaft 5. When the drive cam 502 rotates, it drives the valve rocker arm 2 to swing back and forth via a contact roller 3 located at the rear end of the valve rocker arm 2. The outer wheel surfaces of both the drive cam 502 and the contact roller 3 are inclined structures. The drive cam 502 contacts the contact roller 3 through an inclined drive surface 503 and an inclined contact surface 302. The drive cam 502 is nested and slidably mounted on the horizontal camshaft. 5. The C-type clamping card 603 can drive the drive cam 502 to slide horizontally along the horizontal camshaft 5 to adjust its position. This allows adjustment of the inclined contact point between the drive cam 502 and the contact roller 3, i.e., the radius of the contact point. This controls the distance the drive cam 502 moves with each rotation of the drive contact roller 3, thereby controlling the swing amplitude of the valve rocker arm 2. In other words, it synchronously adjusts the valve lift and movement distance of the engine valve 7. This allows for real-time dynamic adjustment of the valve lift as needed during engine operation to achieve optimal engine efficiency and greater flexibility in use.

[0049] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0050] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A roller-type rocker arm mechanism, comprising a cover support frame (1), wherein a horizontal rocker arm shaft (101) is disposed in the middle of the cover support frame (1), characterized in that, Also includes: The valve rocker arm (2) is rotatably disposed on the outside of the horizontal rocker arm shaft (101). The front and rear ends of the valve rocker arm (2) are respectively provided with valve push rod (4) and contact roller (3). The outer wheel surface of the contact roller (3) is surrounded by an inclined contact surface (302). A horizontal camshaft (5) is arranged parallel to the rear side of the horizontal rocker arm shaft (101). Multiple polygonal drive shafts (501) are evenly spaced in the middle of the horizontal camshaft (5). A drive cam (502) is nested and slidably arranged on the outer side of the polygonal drive shaft (501). The drive cam (502) is arranged in a one-to-one correspondence with the valve rocker arm (2). An inclined drive surface (503) is arranged around the outer wheel surface of the drive cam (502). The drive cam (502) contacts the contact roller (3) through the inclined drive surface (503) and the inclined contact surface (302). A fixed adjustment bracket (6) is set on the rear side of the horizontal camshaft (5). A C-shaped clamping clip (603) is horizontally slidably arranged in the middle of the fixed adjustment bracket (6). A hollow connecting sleeve (604) is symmetrically arranged at the front end of the C-shaped clamping clip (603). The hollow connecting sleeve (604) is symmetrically arranged on the left and right sides of the drive cam (502). The C-shaped clamping clip (603) is horizontally slidably connected to the horizontal camshaft (5) through the hollow connecting sleeve (604). The C-shaped clamping clip (603) and the drive cam (502) are arranged in a one-to-one correspondence. An engine valve (7) is provided below the valve push rod (4). A hollow sleeve is provided inside the engine valve (7). A limit end (701) is provided at the top of the engine valve (7). A valve spring (702) is provided below the limit end (701). The limiting end (701) is rotatably provided with a contact pressure plate (703) in the middle. The top surface of the contact pressure plate (703) is provided with an arc-shaped contact surface (704). The bottom surface of the contact pressure plate (703) is provided with a one-way drive ratchet (705). A spiral drive rod (706) is provided below the one-way drive ratchet (705). A fixing screw sleeve (707) is nested on the outside of the spiral drive rod (706). The fixing screw sleeve (707) is fixedly connected to the cover support frame (1).

2. The roller-type rocker arm mechanism according to claim 1, characterized in that, An adjusting screw (601) is provided on the inner side of the fixed adjusting bracket (6). The adjusting screw (601) is arranged parallel to the horizontal camshaft (5). An adjusting motor (602) is provided at the shaft end of the adjusting screw (601). An adjusting sleeve (605) is provided at the rear end of the C-type clamp (603). The C-type clamp (603) is connected to the adjusting screw (601) through the adjusting sleeve (605).

3. The roller-type rocker arm mechanism according to claim 1, characterized in that, A camshaft support (504) is provided between the horizontal camshaft (5) and the hood support frame (1). The horizontal camshaft (5) and the camshaft support (504) are rotatably connected. A plurality of limiting flanges (505) are provided in the middle of the horizontal camshaft (5). The limiting flanges (505) are placed on the front and rear sides of the camshaft support (504) to provide limiting for the horizontal camshaft (5).

4. The roller-type rocker arm mechanism according to claim 1, characterized in that, A rocker arm bushing (201) is provided at the center of the valve rocker arm (2). The valve rocker arm (2) is rotatably connected to the horizontal rocker arm shaft (101) through the valve rocker arm (2). An inter-shaft oil reservoir ring (202) is provided in the middle of the rocker arm bushing (201). A hollow oil supply pipe (102) is provided inside the horizontal rocker arm shaft (101). An inter-shaft delivery hole (103) is provided on the surface of the horizontal rocker arm shaft (101). The inter-shaft delivery hole (103) is provided one-to-one with the valve rocker arm (2). The inter-shaft oil reservoir ring (202) and the hollow oil supply pipe (102) are interconnected through the inter-shaft delivery hole (103). Lubrication delivery pipes (203) are provided on both the front and rear sides of the inter-shaft oil reservoir ring (202).

5. The roller-type rocker arm mechanism according to claim 4, characterized in that, A central connecting shaft (301) is provided at the center of the contact roller (3). The contact roller (3) is rotatably connected to the valve rocker arm (2) through the central connecting shaft (301). The outer end opening of the lubrication delivery pipe (203) provided near the side of the contact roller (3) is located inside the contact roller (3).

6. The roller-type rocker arm mechanism according to claim 1, characterized in that, A detection magnet (303) is provided in the middle of the contact roller (3), and a Hall detector (104) and a laser rangefinder (105) are provided on the rear side of the cover support frame (1). The Hall detector (104) and the laser rangefinder (105) are provided in a one-to-one correspondence with the contact roller (3).

7. The roller-type rocker arm mechanism according to claim 4, characterized in that, An oil reservoir sleeve (401) is provided inside the valve push rod (4). A connecting opening (402) is provided in the middle of the oil reservoir sleeve (401). A lubrication delivery pipe (203) provided near the valve push rod (4) is connected to the oil reservoir sleeve (401) through the connecting opening (402). A buffer piston (403) is nested and slidably arranged inside the oil reservoir sleeve (401). A spherical fitting groove (405) is provided at the bottom of the buffer piston (403). A contact steel ball (407) is rotatably fitted inside the spherical fitting groove (405). A connecting delivery pipe (404) is provided in the middle of the buffer piston (403). The spherical fitting groove (405) is connected to the oil reservoir sleeve (401) through the connecting delivery pipe (404). Multiple oil guide slots (406) are evenly arranged around the middle of the spherical fitting groove (405).

8. The method of using the roller-type rocker arm mechanism according to any one of claims 1-7, characterized in that, The process includes the following steps: A horizontal camshaft (5) drives a drive cam (502) to rotate. The drive cam (502) drives a valve rocker arm (2) to reciprocate along a horizontal rocker arm shaft (101) via a contact roller (3). When the valve rocker arm (2) swings to one side of the valve, it presses the engine valve (7) downward through the valve push rod (4) to open the valve. When the rocker arm mechanism swings to the other side, the valve spring (702) pushes the engine valve (7) to reset and close the valve, thus controlling the intake and exhaust of the engine. The C-type clamp (6) is then moved. 03) Drive the drive cam (502) to slide horizontally along the horizontal camshaft (5) to adjust the position, adjust the inclined contact point between the drive cam (502) and the contact roller (3), that is, the radius of the contact point between the two, so as to control the distance that the drive cam (502) drives the contact roller (3) to move each time it rotates, thereby controlling the swing amplitude of the valve rocker arm (2), and synchronously adjusting the valve lift of the engine valve (7) to achieve real-time dynamic adjustment of valve lift according to needs during engine operation, so as to achieve the best working efficiency of the engine.

Images