TWI580859B - The rocker structure for the engine cylinder head - Google Patents

Description

Rocker arm structure for engine cylinder head

The present invention relates to a rocker arm structure for an engine cylinder head, and more particularly to a rocker arm structure for an engine cylinder head that can facilitate assembly of a high and low lift intake rocker arm.

According to the valve head movement mechanism of the engine, as shown in FIG. 1 and FIG. 2, wherein the through hole A1 of the first rocker arm A and the through hole B1 of the second rocker arm B are connected to form an oil. The pressure cylinder 1 is respectively provided with a plug cover 11 and 12 at both ends of the hydraulic cylinder 1 , and a spring 13 and a first piston 14 and a second piston 15 which can be pushed by the oil pressure are arranged in the hydraulic cylinder 1 . The cylinder 1 is in communication with the oil control valve by driving the oil passage 16.

When the assembly is assembled, the plug cover 11, the spring 13 and the first piston 14 are pre-assembled in the through hole B1 of the second rocker arm B, and the plug cover 12 and the second piston 15 are pre-grouped in the first In the through hole A1 of the rocker arm A, the first rocker arm A and the second rocker arm B are disposed on the rocker arm shaft on the cylinder head; however, the through hole B1 of the second rocker arm B has a plug cover. 11. The spring 13 and the first piston 14 have a relatively strong elastic force. Therefore, in order to prevent the first piston 14 from being pushed out of the through hole B1 of the second rocker arm B by the spring 13, it is necessary to use the treatment. With the aid of tools or tools, the first rocker arm A and the second rocker arm B can be synchronized on the rocker shaft on the cylinder head, which undoubtedly causes an increase in the difficulty of assembly.

As shown in FIG. 2 , the through hole B1 of the second rocker arm B is provided with a C-shaped buckle C, which is mainly used as a limitation of the slip stroke of the first piston 14 , so the C The buckle C limits the slipping stroke of the first piston 14 and also limits the distance of the second piston 15 into the through hole B1 of the second rocker arm B, thus causing the first rocker arm A and the The linkage reliability of the two rocker B synchronized actions cannot be ensured.

Therefore, how to provide a rocker arm structure for an engine cylinder head to simplify the assembly difficulty of the engine valve pusher and ensure the synchronization of the first rocker arm and the second rocker arm has been urgently solved for the vehicle industry. The subject.

The main object of the present invention is to provide a rocker arm structure for an engine cylinder head, mainly for overcoming the inconvenience of assembling the high and low lift intake rocker arm of the engine, and the linkage reliability of the synchronous action of the first rocker arm and the second rocker arm. Unable to get the missing.

The main technical means for achieving the above object is to provide a rocker arm structure for an engine cylinder head, the engine having a crankcase, a set of cylinder bodies disposed on the crankcase, and a set of a cylinder head on the cylinder body, the cylinder head is provided with a camshaft seat between the intake valve and the exhaust valve, the camshaft seat is provided with a camshaft that can be driven by a timing chain, and the camshaft can be pushed when rotating The intake valve and the intake valve rocker arm and the exhaust valve rocker arm of the exhaust valve, the intake valve rocker arm has a first rocker arm and a second rocker arm, and the first rocker arm is installed The hole is connected to the mounting hole of the second rocker arm, and is provided with a hydraulic cylinder. The hydraulic cylinder is provided with a piston in the mounting hole of the first rocker arm, and the mounting hole of the second rocker arm is provided with a pushing member. The urging member set includes a stop mandrel, a spring and a base, the stop mandrel having a first stop portion, a shaft portion and a second stop portion, the shaft portion being respectively inserted through the base And the two ends of the spring, the first stop portion and the second stop portion are respectively located at the shaft portion End of the head, the end of the spring abut against two sides on the second stop portion and the base, the base is located such that the first stop and the second portion Between the stops.

The effect that the present invention can achieve by the above-mentioned main technical means is that the stop mandrel and the second stop portion can freely slide in the second rocker arm mounting hole, and the piston can penetrate deeper into the a second rocker arm is mounted in the mounting hole, and the piston is positioned between the first rocker arm and the second rocker arm to tie the first rocker arm and the second rocker arm into a linked form, and the rocker arm can be secured And the reliability of the linkage of the second rocker arm, thereby improving the efficiency of the engine.

Another effect that can be achieved by the above-mentioned main technical means is that the mounting hole of the second rocker arm is provided with a pusher group, and the pusher group is inserted into the second shaker by the second stop The arm is mounted in the hole, so that the pushing member group can obtain a stable positioning effect in the second rocker arm mounting hole, and the second stopping portion can freely slide in the second rocker arm mounting hole The pusher set can be pre-assembled into small components and assembled in the mounting hole of the second rocker arm, thereby eliminating the need for the first rocker arm and the second rocker arm to be assembled to the camshaft seat. The first rocker arm and the second rocker arm can be easily assembled on the camshaft seat by using a treatment and a tool to assist assembly, thereby improving the convenience of assembling the first rocker arm and the second rocker arm.

Another effect that can be achieved by the above-mentioned main technical means is that the pusher group can be applied to the second rocker arm by the tight fit formed by the mounting hole of the base and the second rocker arm. A stable and accurate positioning effect is obtained in the mounting hole.

1‧‧‧Hydraulic cylinder

11‧‧‧Segai

12‧‧‧Segai

13‧‧‧ Spring

14‧‧‧First Piston

15‧‧‧second piston

16‧‧‧Drive oil circuit

2‧‧‧ Engine

21‧‧‧ crankcase

211‧‧‧Oil pump

212‧‧‧Main oil supply channel

22‧‧‧Cylinder body

23‧‧‧Cylinder head

231‧‧‧Intake 埠

232‧‧‧Intake valve

233‧‧‧Exhaust gas

234‧‧‧Exhaust valve

235‧‧‧Camshaft seat

236‧‧‧Camshaft

2361‧‧‧First intake cam

2362‧‧‧second intake cam

2363‧‧‧Exhaust cam

3‧‧‧ oil control valve

31‧‧‧Drive oil circuit

4‧‧‧ Timing chain

41‧‧‧ Timing chain tensioner

5‧‧‧Intake valve rocker

51‧‧‧First rocker

511‧‧‧Positioning holes

512‧‧‧Positioning column

513‧‧‧Installation holes

514‧‧‧Pushing roller

52‧‧‧Second rocker

521‧‧‧Positioning holes

522‧‧‧Positioning column

523‧‧‧Installation holes

524‧‧‧Dozer wheel

525‧‧‧Resistance Department

53‧‧‧ shaft

54‧‧‧Hydraulic cylinder

6‧‧‧Exhaust valve rocker arm

61‧‧‧Resistance Department

611‧‧‧Gap adjustment parts

62‧‧‧Pushing roller

63‧‧‧ sleeves

64‧‧‧ shaft

7‧‧‧Piston

71‧‧‧ oil tank

8‧‧‧Promoter group

81‧‧‧stop mandrel

811‧‧‧First stop

812‧‧‧Axis

813‧‧‧ embedded trough

814‧‧‧Second stop

82‧‧ ‧ spring

83‧‧‧Base

831‧‧‧Perforation

832‧‧‧faced

A‧‧‧First rocker

A1‧‧‧through hole

B‧‧‧Second rocker

B1‧‧‧through hole

CC‧‧‧ shaped buckle

Figure 1 and 2 are schematic diagrams of the valve variable head mechanism of the conventional engine.

Figure 3 is a schematic illustration of the engine of the present invention.

Figure 4 is a top plan view of the engine cylinder head of the present invention.

Figure 5 is a partial cross-sectional view of Figure 4.

Figure 6 is a schematic view of the camshaft of the present invention.

Figure 7 is an exploded view of the intake rocker arm of the present invention.

Figure 8 is an exploded view of the pusher set of the present invention.

Figure 9 is a schematic view of the action of the high lift of the present invention.

Figure 10 is a schematic view of the action of the low lift of the present invention.

In order to make the review function easier to understand the structure of the present invention and the achievable effects, the following description will be made with reference to the following figures: First, referring to FIG. 3, the engine 2 of the present invention has a crankcase 21 and a set of devices. A cylinder body 22 on the crankcase 21 and a plurality of cylinder heads 23 disposed on the cylinder body 22.

As shown in FIG. 3, the crankcase 21 is internally provided with a crankshaft (not shown), and an oil pump 211 is disposed in the crankcase 21, and the oil pump 211 sends the oil to a main oil supply passage. 212. The main oil supply passage 212 is communicated by the crankcase 21 through the cylinder body 22 to the oil control valve 3 disposed on the cylinder head 23.

As shown in FIG. 3, the cylinder body 22 is disposed above the crankcase 21 and is configured to pass the timing chain 4, wherein the cylinder body 22 is provided with a timing chain on the side of the intake port 231 of the cylinder head 23. The tensioner 41.

As shown in FIG. 3, FIG. 4, FIG. 5 and FIG. 6, the cylinder head 23 is provided with an intake port 231 and an intake valve 232 on the intake side, and an exhaust port 233 and an exhaust valve 234 on the exhaust side. The cylinder head 23 is disposed between the intake valve 232 and the exhaust valve 234 a camshaft seat 235 is provided with a camshaft 236 that can be driven by the timing chain 4, and the camshaft 236 is respectively provided with a first intake cam 2361 (high lift cam) and a second intake cam. 2362 (low lift cam) and exhaust cam 2363, by the first intake cam 2361, the second intake cam 2362 and the exhaust cam 2363, the camshaft 236 can push the intake valve 232 when rotating The intake valve rocker arm 5 and the exhaust valve rocker arm 6 of the exhaust valve 234; as shown in FIG. 3, FIG. 4 and FIG. 5, one end of the exhaust valve rocker arm 6 is a pressing portion 61, and the The pressing portion 61 is in contact with the exhaust valve 234. The pressing portion 61 has a gap adjusting member 611 at the end, and the other end is an ejector roller 62 which is in contact with the exhaust cam 2363. The exhaust valve is shaken. One side of the arm 6 is provided with a sleeve 63. The sleeve 63 can be passed through the shaft 64. The shaft 64 can be used to stably position the exhaust valve rocker arm 6 on the cam shaft seat 235. In this way, the ejector roller 62 can be pushed by the exhaust cam 2363 of the cam shaft 236, so that the pressing portion 61 can press the exhaust valve 234, thereby opening the exhaust valve to discharge the exhaust gas, and the pressing portion 61 and the row The gap of the gas valve 234 can be adjusted by the gap adjusting member 611, whereby the lift of the exhaust valve 234 can be ensured.

As shown in FIG. 3, 4, 5, 7 and 8, the intake rocker arm 5 has a first rocker arm 51 and a second rocker arm 52. The first rocker arm 51 has a positioning hole 511 in front of the positioning hole. A positioning post 512 is protruded from the lower side of the 511, and a mounting hole 513 is disposed behind the positioning hole 511, and an ejector roller 514 is disposed behind the mounting hole 513. The second rocker arm 52 is opposite to the first rocker arm 51. The positioning hole 521, the positioning post 522, the mounting hole 523 and the ejector roller 524 are disposed in sequence, and the second rocker arm 52 is provided with a pressing portion 525 at the front end edge of the positioning hole 521; the first rocker arm 51 Pusher roller 514 and camshaft 23 The first intake cam 2361 of the second rocker arm 52 is in contact with the second intake cam 2362 of the cam shaft 236, and the pressing portion 525 of the second rocker arm 52 is in contact with the second intake cam 2362 of the second rocker arm 52. The intake valve 232 is in contact with the intake valve 232, thereby ensuring the lift of the intake valve 232, and is further disposed on the positioning holes 511, 521 by a shaft 53 so that the first rocker arm 51 and the second rocker arm can be The 52 is firmly positioned on the camshaft seat 235, whereby the first rocker arm 51 and the second rocker arm 52 are pivoted about the shaft 53.

As shown in FIG. 3, FIG. 4, FIG. 3, FIG. 7 and FIG. 8, the positioning posts 512 and 522 of the first rocker arm 51 and the second rocker arm 52 are located between the positioning holes 511 and 521 and the pressing portion 525. The mounting holes 513 and 523 of the rocker arm 51 and the second rocker arm 52 are located between the ejector rollers 514 and 524 and the positioning holes 511 and 521. The first rocker arm 51 mounting hole 513 is a blind hole. The mounting hole 523 of the second rocker arm 52 is a through hole; the mounting hole 513 of the first rocker arm 51 and the mounting hole 523 of the second rocker arm 52 communicate with each other to form a hydraulic cylinder 54. The hydraulic cylinder 54 is located A piston 7 is disposed in the mounting hole 513 of the first rocker arm 51. The piston 7 has an oil passage 71 therein. The first rocker arm 51 mounting hole 513 communicates with the driving oil passage 31. The driving oil passage 31 communicates with the oil. The control hole 3 is controlled by the control valve 3; the mounting hole 523 of the second rocker arm 52 is provided with a pusher group 8 including a stop spindle 81, a spring 82 and a base 83; the stop spindle 81 One end has a first stop portion 811 protruding from the outer periphery, and the stop mandrel 81 is a shaft portion 812 extending from the first stop portion 811 toward the one side, and the shaft portion 812 is away from the first stop portion 811 of The second end of the shaft portion 812 is respectively disposed at the end of the shaft portion 812. The first stop portion 811 and the second stop portion 814 are respectively located at the two ends of the shaft portion 812. The second stop portion 814 is embedded in the head spindle 81 away from the first The other end of the stop portion 811 can be integrated with the stop spindle 81 and can be synchronized, that is, the first stop portion 811 or the second stop of the stop spindle 81 At least one stop portion of the portion 814 is coupled to the stop mandrel 81 in an assembled manner; the shaft portion 812 of the stop mandrel 81 is inserted through the base 83 and the two ends of the spring 82, respectively, and then The second stopping portion 814 is coupled together such that the base 83 is located between the first stopping portion 811 and the second stopping portion 814; the first stopping portion 811 of the stopping mandrel 81 is located at the second stopping portion 811 The outer side of the mounting hole 523 of the second rocker arm 52; the outer diameter of the second stopping portion 814 of the stopping mandrel 81 is smaller than the inner diameter of the mounting hole 523 of the second rocker arm 52, more specifically, the second end The blocking portion 814 is inserted into the mounting hole 523 of the second rocker arm 52 to form a sliding arrangement; the two sides of the spring 82 are respectively abutted against the second stopping portion 814 and the base 83; the base 83 The outer diameter of the second rocker arm 52 matches the inner diameter of the mounting hole 523 of the second rocker arm 52. More specifically, the base 83 is inserted into the mounting hole 523 of the second rocker arm 52 to be in a tight fit state. 83 a through hole 831, whereby the stop mandrel 81 can pass through the through hole 831, so that the shaft portion 812 of the stop mandrel 81 can freely shuttle to the base 83, and at least one side of the outer periphery of the base 83 A face 832 is provided which allows the lubricating oil entering the mounting hole 523 of the second rocker arm 52 to circulate. Therefore, the second stopping portion 814, the spring 82, the base 83 and the stopping mandrel 81 can be pre-assembled into the pushing member group 8 to enable the pushing member group 8 to be a modular component. The group 8 is further inserted into the mounting hole 523 of the second rocker arm 52 by the second stopping portion 814, and the tight fit of the base 83 and the mounting hole 523 of the second rocker arm 52 is further The urging member set 8 can obtain a stable positioning effect in the mounting hole 523 of the second rocker arm 52, and the second stopping portion 814 can freely slide in the mounting hole 523 of the second rocker arm 52. .

As shown in FIGS. 3, 4, 9 and 10, in the implementation of the present invention, the oil is sent to a main oil supply passage 212 by an oil pump 211 provided in the crankcase 21, and the main oil supply passage 212 is provided by the crankcase 21. After the cylinder body 22 is connected to the oil control valve 3 disposed in the cylinder head 23, the oil control valve 3 then feeds the oil into the cylinder head 23 driving oil passage 31 and then enters the hydraulic cylinder 54; After the control center ECU (not shown in the figure) of the engine 2 senses the driving state of the vehicle, if only the steam valve is required to have a high lift opening degree, the control center ECU of the engine 2 can cause the oil control valve 3 to drive the oil from the driving oil. The road 31 enters the hydraulic cylinder 54. As shown in FIG. 9, the piston 7 disposed in the mounting hole 513 of the first rocker arm 51 is moved toward the second rocker arm 52 by the oil pressure. The second rocker arm 52 is moved. The second stop portion 814 of the pusher set 8 in the mounting hole 523 is pushed by the piston 7 in synchronization with the stop spindle 81 in the second rocker arm 52 mounting hole 523 toward the piston 7 The direction of travel slips, whereby the front end portion of the piston 7 enters the mounting hole 523 of the second rocker arm 52, so that the piston 7 can penetrate deeper into the second rocker arm 52. The mounting hole 523 is disposed so that the piston 7 is positioned between the first rocker arm 51 and the second rocker arm 52. At this time, the first rocker arm 51 and the second rocker arm 52 are interlocked, and the first is ensured. The linkage reliability of the rocker arm 51 and the second rocker arm 52 is such that the ejector roller 514 behind the first rocker arm 51 is in contact with the first intake cam 2361 of the camshaft 236 (ie, the high lift cam), and the second shake The pressing portion 525 of the front end of the arm 52 is in contact with the intake valve 232, so that the second rocker arm 52 is driven by the first rocker arm 51, that is, the degree of the first intake cam 2361 (ie, the high lift cam) is raised. The intake valve 232 is brought to a predetermined high lift opening.

As shown in Figure 3, 4, 9 and 10, when the engine 2 has to change the driving state to the low lift opening, the control center ECU of the engine 2 can make the oil control valve 3 The oil is withdrawn from the hydraulic cylinder 54 by the driving oil passage 31. As shown in FIG. 10, the second spring is pushed by the elastic force of the spring 82 of the pusher group 8 in the mounting hole 523 of the second rocker arm 52. a blocking portion 814, the second stopping portion 814 is synchronized with the stopping spindle 81 to push the piston 7 still located in the mounting hole 523 of the second rocker arm 52 to return the piston 7 to the first rocker arm. When the first stopping portion 811 of the stopping mandrel 81 abuts against the outside of the base 83, the piston 7 is completely retracted into the mounting hole 513 of the first rocker arm 51. At this time, the first rocker arm 51 and the second rocker arm 52 are respectively oscillated, because the pressing portion 525 of the front end of the second rocker arm 52 is in contact with the intake valve 232, and the ejector roller behind the second rocker arm 52 The 524 is in contact with the second intake cam 2362 (i.e., the low lift cam) of the camshaft 236. Therefore, at this time, the intake valve 232 of the engine 2 is in a low lift state.

The effect of the present invention is that a mounting member 8 is provided by the mounting hole 523 of the second rocker arm 52. The pushing member set 8 includes a second stopping portion 814, a spring 82, a base 83 and a stop. The mandrel 81, the stop mandrel 81 and the second stop portion 814 can freely slide in the mounting hole 523 of the second rocker arm 52, and the piston 7 can penetrate deeper into the mounting hole of the second rocker arm 52. 523, the piston 7 is positioned between the first rocker arm 51 and the second rocker arm 52, so that the first rocker arm 51 and the second rocker arm 52 are interlocked, and the first shake can be ensured. The interlocking reliability of the arm 51 and the second rocker arm 52 can further improve the use efficiency of the engine 2.

A further effect of the present invention is that the pusher set 8 can be pre-assembled into small components and then assembled in the mounting hole 523 of the second rocker arm 52, whereby the first rocker arm 51 and the second rocker arm When assembled to the camshaft seat 235, the first rocker arm 51 and the second rocker arm 52 can be easily assembled to the camshaft seat 2 without using a jig or a tool to facilitate assembly. 35, in turn, to improve the convenience of assembly of the first rocker arm 51 and the second rocker arm 52.

Another effect of the present invention is that the pusher assembly 8 can be obtained in the second rocker arm 52 mounting hole 523 by the tight fit of the base 83 and the mounting hole 523 of the second rocker arm 52. Stable and precise positioning.

A further effect of the present invention is that the stop mandrel 81 of the pusher set 8 can be guided by the second stop portion 814 and the base 83 to slide the stop spindle 81 of the pusher set 8 Mobile work can be smoother.

In summary, the present invention, by the above-mentioned configuration, can indeed improve the lack of conventional use, and can achieve the purpose and effect of the claim, and should have met the practicality, novelty, and progressive requirements described in the invention patent.提出Proposing an application for a patent for invention in accordance with the law, and asking for a detailed examination of your examiner, Huishen granted the examination and approval of the invention patent, to the sense of virtue.

5‧‧‧Intake valve rocker

51‧‧‧First rocker

511‧‧‧Positioning holes

512‧‧‧Positioning column

513‧‧‧Installation holes

514‧‧‧Pushing roller

52‧‧‧Second rocker

521‧‧‧Positioning holes

522‧‧‧Positioning column

523‧‧‧Installation holes

524‧‧‧Dozer wheel

525‧‧‧Resistance Department

7‧‧‧Piston

71‧‧‧ oil tank

8‧‧‧Promoter group

81‧‧‧stop mandrel

811‧‧‧First stop

812‧‧‧Axis

813‧‧‧ embedded trough

814‧‧‧Second stop

82‧‧ ‧ spring

83‧‧‧Base

831‧‧‧Perforation

Claims (10)

A rocker arm structure for an engine cylinder head, the engine having a crankcase, a plurality of cylinder bodies disposed on the crankcase, and a plurality of cylinder heads disposed on the cylinder body, the cylinder heads being coupled to the intake valves A camshaft seat is disposed between the exhaust valves, and the camshaft seat is provided with a camshaft that can be driven by a timing chain, and the camshaft can push the intake valve and the intake valve of the exhaust valve when rotating a rocker arm and an exhaust valve rocker arm, the intake valve rocker arm has a first rocker arm and a second rocker arm, and the mounting hole of the first rocker arm and the mounting hole of the second rocker arm are connected The hydraulic cylinder is characterized in that: the hydraulic cylinder is provided with a piston in the mounting hole of the first rocker arm, the mounting hole of the second rocker arm is provided with a pusher group, and the pusher group includes a stop core a shaft, a spring and a base, the stop spindle has a first stop portion, a shaft portion and a second stop portion, the shaft portion is respectively inserted through the base and the two ends of the spring, the first stop The blocking portion and the second stopping portion are respectively located on the two end portions of the shaft portion, and the two lateral ends of the spring respectively abut against the Two stops on the base portion, such that the base is located between the first stop portion and the second stopper portion. The rocker arm structure for an engine cylinder head according to claim 1, wherein the piston has an oil passage, and the mounting hole of the first rocker communicates with the driving oil passage, and the driving oil passage is connected Controlled by oil control valves. The rocker arm structure for the engine cylinder head according to the first aspect of the invention, wherein the mounting hole of the first rocker arm is a blind hole, and the mounting hole of the second rocker arm is a through hole. The rocker arm structure for an engine cylinder head according to claim 1, wherein an outer diameter of the second stopping portion is smaller than an inner diameter of the mounting hole of the second rocker arm, and the second stopping portion is mounted. The sliding structure is formed in the mounting hole of the second rocker arm. The rocker arm structure for an engine cylinder head according to claim 1, wherein the first stop portion of the stop spindle or the at least one stop portion of the second stop portion is grouped The arrangement is coupled to the stop mandrel. The rocker arm structure for an engine cylinder head according to claim 1, wherein an outer diameter of the base matches an inner diameter of a mounting hole of the second rocker arm, and the base is mounted to the second rocker arm The rear of the mounting hole is tightly fitted. The rocker arm structure for an engine cylinder head according to claim 6, wherein the base has a through hole through which the stop mandrel can be inserted, whereby the stop mandrel can be freely Shuttle to the base. The rocker arm structure for an engine cylinder head according to claim 1, wherein the outer periphery of the base is provided with at least a face which is accessible for the installation of the second rocker arm. The lubricating oil in the hole is circulated. The rocker arm structure for an engine cylinder head according to claim 1 or 5, wherein one end of the stop spindle has the first stop protruding from an outer circumference, the stop spindle a shaft portion extending from the first stopping portion toward one side, the shaft portion being inserted through the base and the spring, and then coupled with the second stopping portion, the shaft portion being away from the first stopping portion One end is provided with an embedded groove, and the embedded groove is for the second stop to be embedded. The rocker arm structure for an engine cylinder head according to claim 9, wherein the first stop of the stop spindle is slidable against the outer side of the base.