Camshaft driving device with adjusting function

Abstract

The camshaft driving device with the adjusting function comprises a camshaft rod, guide grooves are formed in the inner sides of every two sets of cams of the camshaft rod, filling grooves are formed in the guide grooves in a communicating mode, and axle distance adjusting mechanisms are installed in the filling grooves in a sliding mode. And the two groups of axle distance adjusting mechanisms penetrate out of the guide grooves, and rotating shafts are rotationally mounted between the two groups of axle distance adjusting mechanisms. Through the design of the axle distance adjusting mechanism, the lifting stroke of the cam shaft can be adjusted according to different working conditions of an engine, such as idling, low-speed driving, high-speed driving and rapid acceleration, so that unnecessary air intake and exhaust are reduced, and oil consumption and emission are reduced.

Description

Technical Field

[0001] This utility model relates to the field of camshaft technology, specifically to a camshaft drive device with adjustment function. Background Technology

[0002] The camshaft is a component in a piston engine. Its function is to control the opening and closing of the valves. Camshafts are usually forged from high-quality carbon steel or alloy steel, or cast from alloy cast iron or ductile iron. The journal and cam working surfaces are polished after heat treatment. Since the valve movement pattern is related to the power and operating characteristics of an engine, the camshaft design occupies a very important position in the engine design process.

[0003] For example, the patent with authorized patent publication number CN210483835U discloses a camshaft that is easy to replace and maintain. It includes a left camshaft, with one side of the left camshaft connected to a right camshaft. Both the left and right camshafts have connecting ends at their opposite ends. The left camshaft has a first mating end opposite the right camshaft, and the right camshaft has a second mating end opposite the left camshaft. The beneficial effects of this invention are: unlike traditional camshafts, it divides the camshaft into a left and right camshaft. Using an assembly method, multiple sections can be assembled according to the length of the camshaft. If one section of the camshaft is damaged, only one section needs to be removed, eliminating the need for complete disassembly. This allows for quick disassembly and facilitates later replacement and maintenance. The left and right camshafts are connected and fixed by the first and second mating ends, resulting in a stable and compact connection. The overall structure is reasonable, facilitating replacement and maintenance, greatly saving maintenance time, and demonstrating high practicality.

[0004] However, the aforementioned camshafts, which are easy to replace and maintain, cannot adjust the lifting and lowering stroke of the camshaft pushing the piston according to different engine operating conditions, such as idling, low-speed driving, high-speed driving, and rapid acceleration. This can lead to excessive intake air volume, causing an imbalance in the fuel-air mixture, resulting in unstable engine idling, vibration, and affecting driving comfort. Utility Model Content

[0005] The purpose of this invention is to provide a camshaft drive device with an adjustable function to solve the problem mentioned in the background art that the camshaft cannot adjust the lifting and lowering stroke of the piston according to different engine operating conditions, such as idling, low speed driving, high speed driving, and rapid acceleration.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A camshaft drive device with adjustment function includes: a camshaft rod, wherein each pair of cams on the camshaft rod has a guide groove on its inner side, a filling groove is opened in the guide groove, a wheelbase adjustment mechanism is slidably installed in the filling groove, and two sets of wheelbase adjustment mechanisms extend through the guide groove and are rotatably mounted between them.

[0008] Preferably, an oil inlet window is provided on the outer surface of one end of the camshaft rod, a sealing ring is rotatably installed on the outer surface of the oil inlet window, an oil pipe is connected to the outer surface of the sealing ring, a first piston is slidably installed in the oil pipe, and the first piston is fixedly installed on one end of the piston rod of the hydraulic cylinder.

[0009] Preferably, each camshaft has an oil passage inside its cam, which is connected to the wheelbase adjustment mechanism, thereby allowing the oil passage to be connected to the filling groove through the wheelbase adjustment mechanism.

[0010] Preferably, the wheelbase adjustment mechanism can be connected to the oil passage in another set of cams through the rotating shaft, so that multiple sets of cams can be connected through the oil passage. The oil pipe, oil passage and wheelbase adjustment mechanism are all filled with hydraulic oil.

[0011] Preferably, the wheelbase adjustment mechanism includes a second piston, which is slidably installed in the filling groove. A guide rod is fixedly installed on the outer surface of the second piston, and the guide rod slides out from the guide groove, thereby enabling a rotating shaft to be rotatably installed between the two sets of guide rods. A sealing arc plate is fixedly installed at one end of the outer surface of the second piston, so that when the second piston slides in the filling groove, it will drive the sealing arc plate to block the guide groove, thereby ensuring that the injected hydraulic oil will not leak out.

[0012] Preferably, an L-shaped pipe is provided between the second piston and the guide rod, so that when the first piston at one end of the piston rod of the hydraulic cylinder squeezes hydraulic oil in the oil pipe and injects it into the oil inlet window, the oil inlet window can inject the hydraulic oil into the oil passage and into the filling groove to push the second piston. The pushed second piston can then drive the rotating shaft to slide between the cams of the camshaft rod, changing the pushing stroke.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Through the design of the oil passage, hydraulic cylinder, oil pipe, first piston, and wheelbase adjustment mechanism, at low speeds, the hydraulic cylinder can be activated to push the first piston at one end of the piston rod to slide in the oil pipe. This allows the first piston to squeeze the hydraulic oil in the oil pipe into the oil inlet window and inject it into the oil passage. The hydraulic oil can then flow into the filling groove along the oil passage. The excess oil injected into the filling groove will flow through the L-shaped pipe opened in the wheelbase adjustment mechanism that is slidably installed in the filling groove, through the rotating shaft, into the oil pipe of the other cam. This allows the hydraulic oil to be injected into the filling groove of another set of cams again along the oil pipe. This process is repeated, and the hydraulic oil enters the filling grooves of multiple sets of cams simultaneously, so that the liquid level in all areas changes synchronously and ultimately maintains a consistent height. The injected hydraulic oil increases the amount of oil in the filling groove, which in turn pushes the wheelbase adjustment mechanism to slide down in the filling groove. This causes the synchronously descending wheelbase adjustment mechanism to drive the rotating shaft installed between them to slide down in the cam of the cam shaft, thereby reducing the pushing and pulling stroke.

[0015] When driving at high speeds, the hydraulic cylinder can be activated to pull the first piston at one end of the piston rod down the oil pipe to draw hydraulic oil. This allows hydraulic oil from multiple filling slots to be drawn into the oil pipe through the oil passage. As the hydraulic oil in the filling slots is drawn, it will simultaneously attract the wheelbase adjustment mechanism and slide upwards. This allows the synchronously rising wheelbase adjustment mechanism to drive the rotating shaft mounted between them to slide upwards within the cam of the camshaft rod, thereby increasing the pushing and pulling stroke. This allows the camshaft to adjust its lifting stroke according to different engine operating conditions, such as idling, low speed driving, high speed driving, and rapid acceleration, thereby reducing unnecessary intake and exhaust, and lowering fuel consumption and emissions.

[0016] 2. Through the design of the second piston, sealing arc plate, L-shaped pipeline and guide rod, at low speeds, the hydraulic cylinder can push the first piston at one end of the piston rod to slide in the oil pipe. This allows the first piston to squeeze the hydraulic oil in the oil pipe into the oil inlet window and inject it into the oil passage. The hydraulic oil can then flow into the filling groove along the oil passage. The excess oil injected into the filling groove will flow through the L-shaped pipeline opened in the second piston that slides in the filling groove, through the rotating shaft, into the oil pipe of the other cam. This allows the hydraulic oil to be injected into the filling groove of another set of cams again. This process is repeated to make the liquid level in all areas change synchronously and eventually maintain a consistent height. The injected hydraulic oil can push the second piston to slide down in the filling groove. This allows the synchronously descending second piston to drive the rotating shaft installed between the guide rods to slide down in the cam of the camshaft rod. This reduces the pushing and pulling stroke. The smaller stroke can reduce unnecessary air intake and exhaust gas discharge, allowing the engine to operate more economically under low load conditions and reduce fuel consumption.

[0017] When driving at high speeds, the hydraulic cylinder can be activated to pull the first piston at one end of the piston rod down the oil pipe to draw hydraulic oil. This allows hydraulic oil from multiple filling slots to be drawn into the oil pipe through the oil passage. As the hydraulic oil in the filling slots is drawn, it simultaneously attracts the second piston, which slides upward within the filling slot. This causes the synchronously rising second piston to drive the rotating shaft mounted between them to slide upward within the cam of the camshaft rod, thereby increasing the pushing and pulling stroke. This increases the intake and exhaust efficiency, allowing more fuel and air to mix and burn, thus improving the engine's power output. This helps improve the vehicle's acceleration performance and top speed at high speeds, meeting the power demands of the vehicle under high-speed conditions. This allows the engine's intake and exhaust volumes to be adjusted according to actual needs. Furthermore, as the second piston slides within the filling slot, it also drives the sealing arc plate fixedly mounted on its outer surface to slide down within the filling slot, blocking the expanded guide groove to ensure that the injected hydraulic oil does not leak out. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the camshaft drive device with adjustment function according to this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the present invention, showing multiple sets of cams connected by oil passages;

[0020] Figure 3 This is a schematic diagram of the wheelbase adjustment mechanism of this utility model.

[0021] In the diagram: 1. Camshaft rod; 101. Oil inlet window; 102. Guide groove; 103. Filler groove; 104. Oil passage; 105. Rotary shaft; 2. Hydraulic cylinder; 201. Oil pipe; 202. Sealing ring; 203. First piston; 3. Wheelbase adjustment mechanism; 301. Second piston; 302. Sealing arc plate; 303. L-shaped pipeline; 304. Guide rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-3 This embodiment provides the following technical solution:

[0024] like Figures 1-2As shown, a camshaft drive device with adjustment function includes: a camshaft rod 1, a guide groove 102 is provided on the inner side of each pair of cams of the camshaft rod 1, a filling groove 103 is provided in the guide groove 102, a wheelbase adjustment mechanism 3 is slidably installed in the filling groove 103, and a rotating shaft 105 is rotatably installed between the two sets of wheelbase adjustment mechanisms 3 through the guide groove 102.

[0025] Among them, an oil inlet window 101 is provided on the outer surface of one end of the camshaft rod 1. A sealing ring 202 is rotatably installed on the outer surface of the oil inlet window 101. An oil pipe 201 is connected to the outer surface of the sealing ring 202. A first piston 203 is slidably installed inside the oil pipe 201. The first piston 203 is fixedly installed on one end of the piston rod of the hydraulic cylinder 2.

[0026] Each camshaft rod 1 has an oil passage 104 inside its cam. The oil passage 104 is connected to the wheelbase adjustment mechanism 3, so that the oil passage 104 is connected to the filling groove 103 through the wheelbase adjustment mechanism 3.

[0027] Among them, the wheelbase adjustment mechanism 3 can be connected to the oil passage 104 in another set of cams through the rotating shaft 105, so that multiple sets of cams can be connected through the oil passage 104. The oil pipe 201, the oil passage 104 and the wheelbase adjustment mechanism 3 are all filled with hydraulic oil.

[0028] Through the design of the oil passage 104, hydraulic cylinder 2, oil pipe 201, first piston 203, and wheelbase adjustment mechanism 3, at low speeds, the hydraulic cylinder 2 can be activated to push the first piston 203 at one end of the piston rod to slide within the oil pipe 201. This allows the first piston 203 to squeeze the hydraulic oil in the oil pipe 201 into the oil inlet window 101 and inject it into the oil passage 104. The hydraulic oil then flows along the oil passage 104 into the filling groove 103. Any excess oil injected into the filling groove 103 will flow through the L-shaped pipe 303 slidably installed within the wheelbase adjustment mechanism 3 in the filling groove 103, through the rotating shaft 105, and into the cam on the other side. The hydraulic oil in the oil pipe 201 can be injected into the filling groove 103 of another set of cams again, and so on. During this process, the hydraulic oil enters the filling groove 103 of multiple sets of cams simultaneously, so that the liquid level in all areas changes synchronously and eventually maintains a consistent height. The injected hydraulic oil will increase the amount of oil in the filling groove 103, which will push the wheelbase adjustment mechanism 3 to slide down in the filling groove 103. In turn, the synchronously descending wheelbase adjustment mechanism 3 will drive the rotating shaft 105 installed between them to slide down in the cam of the camshaft 1, thereby reducing the pushing and pulling stroke.

[0029] When driving at high speed, the hydraulic cylinder 2 can be activated to pull the first piston 203 at one end of the piston rod to slide down in the oil pipe 201 to draw hydraulic oil. This allows the hydraulic oil in multiple sets of filling grooves 103 to be drawn into the oil pipe 201 through the oil passage 104. When the hydraulic oil in the filling grooves 103 is drawn out, it will also attract the wheelbase adjustment mechanism 3 to slide upward. This allows the synchronously rising wheelbase adjustment mechanism 3 to drive the rotating shaft 105, which is rotatably mounted between them, to slide upward in the cam of the camshaft rod 1. This increases the pushing and pulling stroke, and can adjust the lifting stroke of the camshaft according to different engine operating conditions, such as idling, low speed driving, high speed driving, and rapid acceleration, thereby reducing unnecessary intake and exhaust, and reducing fuel consumption and emissions.

[0030] like Figure 3 As shown, the wheelbase adjustment mechanism 3 includes a second piston 301, which is slidably installed in the filling groove 103. A guide rod 304 is fixedly installed on the outer surface of the second piston 301. The guide rod 304 slides out from the guide groove 102, thereby allowing a rotating shaft 105 to be rotatably installed between the two sets of guide rods 304. A sealing arc plate 302 is fixedly installed at one end of the outer surface of the second piston 301. During the sliding process of the second piston 301 in the filling groove 103, it will drive the sealing arc plate 302 to block the guide groove 102, so as to ensure that the injected hydraulic oil will not leak out.

[0031] An L-shaped pipe 303 is provided between the second piston 301 and the guide rod 304. This allows the first piston 203, which pushes one end of the piston rod of the hydraulic cylinder 2, to squeeze hydraulic oil into the oil inlet window 101 through the oil pipe 201. The oil inlet window 101 then injects the hydraulic oil into the oil passage 104 and into the filling groove 103, pushing the second piston 301. The pushed second piston 301 can then drive the rotating shaft 105 to slide between the cams of the camshaft rod 1, changing the pushing stroke.

[0032] Through the design of the second piston 301, sealing arc plate 302, L-shaped pipe 303, and guide rod 304, at low speeds, the first piston 203 at one end of the piston rod can be pushed by the hydraulic cylinder 2 to slide within the oil pipe 201. This allows the first piston 203 to squeeze the hydraulic oil in the oil pipe 201 into the oil inlet window 101 and inject it into the oil passage 104. The hydraulic oil then flows into the filling groove 103 along the oil passage 104. Any excess oil injected into the filling groove 103 will flow through the L-shaped pipe 303 opened in the second piston 301, which is slidably installed within the filling groove 103, through the rotating shaft 105, and into the oil pipe 2 of the cam on the other side. Within 01, hydraulic oil can be injected again into the filling groove 103 of another set of cams through the oil pipe 201. This process is repeated to make the fluid level in all areas change synchronously and eventually maintain a consistent height. The injected hydraulic oil can push the second piston 301 to slide down in the filling groove 103. In turn, the synchronously descending second piston 301 can drive the rotating shaft 105, which is rotatably mounted between the guide rods 304, to slide down in the cam of the camshaft rod 1. This reduces the push and pull strokes. The smaller stroke can reduce unnecessary air intake and exhaust gas discharge, allowing the engine to operate more economically under low load conditions and reduce fuel consumption.

[0033] When driving at high speed, the hydraulic cylinder 2 can be activated to pull the first piston 203 at one end of the piston rod down in the oil pipe 201 to draw hydraulic oil. This allows the hydraulic oil in multiple sets of filling grooves 103 to be drawn into the oil pipe 201 through the oil passage 104. When the hydraulic oil in the filling grooves 103 is drawn out, it will simultaneously attract the second piston 301 to slide up in the filling grooves 103. This allows the synchronously rising second piston 301 to drive the rotating shaft 105, which is rotatably mounted between them, to slide up in the cam of the camshaft rod 1. This increases the pushing and pulling stroke, thereby increasing the intake and exhaust volume. Efficiency allows for more fuel and air to mix and burn, thereby increasing engine power output. This helps improve the vehicle's acceleration performance and top speed at high speeds, meeting the vehicle's power demands under high-speed conditions. This allows the engine's intake and exhaust volumes to be adjusted according to actual needs. Furthermore, as the second piston 301 slides within the filling groove 103, it drives the sealing arc plate 302, which is fixedly installed on the outer surface, to slide down within the filling groove 103 to block the expanded guide groove 102, ensuring that the injected hydraulic oil does not leak out.

[0034] Based on the above technical solution, the working steps of this solution are summarized as follows: During low-speed driving, the first piston 203 at one end of the piston rod can be pushed by the hydraulic cylinder 2 to slide within the oil pipe 201. This allows the first piston 203 to squeeze the hydraulic oil in the oil pipe 201 into the oil inlet window 101 and inject it into the oil passage 104. The hydraulic oil then flows along the oil passage 104 into the filling groove 103. Any excess oil injected into the filling groove 103 will flow through the L-shaped pipe 303 opened within the second piston 301, which is slidably mounted within the filling groove 103, through the rotating shaft 105, into the oil pipe 201 of the cam on the other side. Hydraulic oil is injected again into the filling groove 103 of another set of cams through the oil pipe 201. This process is repeated to make the fluid level in all areas change synchronously and eventually maintain a consistent height. The injected hydraulic oil can push the second piston 301 to slide down in the filling groove 103. In turn, the synchronously descending second piston 301 can drive the rotating shaft 105, which is mounted between the guide rods 304, to slide down in the cam of the camshaft rod 1. This reduces the push and pull stroke. The smaller stroke can reduce unnecessary air intake and exhaust gas discharge, allowing the engine to operate more economically under low load conditions and reduce fuel consumption.

[0035] During high-speed operation, the hydraulic cylinder 2 can be activated to pull the first piston 203 at one end of the piston rod down into the oil pipe 201 to draw hydraulic oil. This allows hydraulic oil from multiple sets of filling grooves 103 to be drawn into the oil pipe 201 through the oil passage 104. As the hydraulic oil in the filling grooves 103 is drawn out, it simultaneously attracts the second piston 301, which slides upward within the filling grooves 103. This causes the synchronously rising second piston 301 to drive the rotating shaft 105, which is rotatably mounted between them, to slide upward within the cam of the camshaft rod 1, thereby increasing the pushing and pulling action. The stroke increases the intake volume and exhaust efficiency, allowing more fuel and air to mix and burn, thereby improving the engine's power output. This helps improve the vehicle's acceleration performance and top speed at high speeds, meeting the vehicle's power requirements under high-speed conditions. Furthermore, as the second piston 301 slides within the filling groove 103, it drives the sealing arc plate 302, which is fixedly installed on the outer surface, to slide down within the filling groove 103 to block the expanded guide groove 102, ensuring that the injected hydraulic oil does not leak out.

[0036] In summary: It can adjust the camshaft lifting stroke according to different engine operating conditions, such as idling, low speed driving, high speed driving, and rapid acceleration, thereby reducing unnecessary intake and exhaust, and reducing fuel consumption and emissions.

[0037] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A camshaft drive device with an adjustment function, characterized in that, include: A camshaft rod (1) has guide grooves (102) on the inner side of each pair of cams. A filling groove (103) is connected in the guide groove (102). A wheelbase adjustment mechanism (3) is slidably installed in the filling groove (103). Both wheelbase adjustment mechanisms (3) pass through the guide groove (102) and are rotatably mounted between them with a rotating shaft (105).

2. The camshaft drive device with adjustment function according to claim 1, characterized in that: An oil inlet window (101) is provided on the outer surface of one end of the camshaft rod (1). A sealing ring (202) is rotatably installed on the outer surface of the oil inlet window (101). An oil pipe (201) is connected to the outer surface of the sealing ring (202). A first piston (203) is slidably installed inside the oil pipe (201). The first piston (203) is fixedly installed on one end of the piston rod of the hydraulic cylinder (2).

3. A camshaft drive device with adjustment function according to claim 2, characterized in that: Each camshaft rod (1) has an oil passage (104) inside its cam. The oil passage (104) is connected to the wheelbase adjustment mechanism (3), so that the oil passage (104) is connected to the filling groove (103) through the wheelbase adjustment mechanism (3).

4. A camshaft drive device with adjustment function according to claim 3, characterized in that: The wheelbase adjustment mechanism (3) can be connected to the oil passage (104) in another set of cams through the rotating shaft (105), so that multiple sets of cams can be connected through the oil passage (104). The oil pipe (201), oil passage (104) and wheelbase adjustment mechanism (3) are all filled with hydraulic oil.

5. A camshaft drive device with adjustment function according to claim 4, characterized in that: The wheelbase adjustment mechanism (3) includes a second piston (301), which is slidably installed in the filling groove (103). A guide rod (304) is fixedly installed on the outer surface of the second piston (301). The guide rod (304) slides out from the guide groove (102), thereby allowing a rotating shaft (105) to be rotatably installed between the two sets of guide rods (304). A sealing arc plate (302) is fixedly installed at one end of the outer surface of the second piston (301), so that when the second piston (301) slides in the filling groove (103), it will drive the sealing arc plate (302) to block the guide groove (102).

6. A camshaft drive device with adjustment function according to claim 5, characterized in that: An L-shaped pipe (303) is provided between the second piston (301) and the guide rod (304), so that when the hydraulic cylinder (2) pushes the first piston (203) at one end of the piston rod to squeeze the hydraulic oil in the oil pipe (201) and inject it into the oil inlet window (101), the oil inlet window (101) can inject the hydraulic oil into the oil passage (104) and enter the filling groove (103) to push the second piston (301). The pushed second piston (301) drives the rotating shaft (105) to slide between the cams of the camshaft rod (1).

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