[0020] The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings.
[0021] like image 3 , 4 As shown, the preferred embodiment of the cylinder head device with torsion bar of the present invention is installed on a cylinder block 4, and the cylinder head device includes a cylinder head 3, a camshaft group 5, a rocker arm unit 6, Two torsion bars 7, and a locking unit 8.
[0022] The cylinder head 3 is disposed on the cylinder block 4, and has a cylinder head body 31, a first support wall 32 and a second support wall 33 extending upwardly from the cylinder head body 31 at intervals, and four are respectively connected The first and second supporting walls 32 and 33 are provided with upright posts 34 on both sides. The first and second supporting walls 32 and 33 are formed with opposite mounting holes 321 and 331 , and each upright post 34 is formed with a screw hole 341 .
[0023] The camshaft group 5 is rotatably passed through the mounting holes 321 and 331 of the first and second supporting walls 32 and 33 to drive the rocker arm unit 6 to swing. In this preferred embodiment, the camshaft set 5 has two bearings 51 respectively disposed in the mounting holes 321 and 331 of the first and second supporting walls 32 and 33 , and a rotating shaft passing through the two bearings 51 . 52 , and two cams 53 disposed on the shaft 52 and between the two bearings 51 .
[0024] The rocker arm unit 6 is interposed between the first and second support walls 32 and 33 and can swing relative to the cylinder head 3 . In this preferred implementation, the rocker arm unit 6 has a first rocker arm 61 and a second rocker arm 62 pivotally connected to the first and second support walls 32 and 33 . The first and second rocker arms 61 , 62 are opposite. In this embodiment, the first and second rocker arms 61 and 62 are Y-shaped, and their bifurcated parts extend outwardly away from each other, and each outer end is connected to a valve rod 9 .
[0025] The orientations of the two cams 53 of the camshaft group 5 are different by a set angle, and the inner ends of the first and second rocker arms 61 and 62 are in contact with the two cams 53 respectively. The two cams 53 sequentially drive the first and second rocker arms 61 and 62 to swing up and down, whereby the linked valve rod 9 moves up and down sequentially to achieve the purpose of intake and exhaust.
[0026] The two torsion bars 7 are spaced apart from each other and are connected to the four uprights 34 on both sides of the first and second supporting walls 32 and 33 so as to form a horizontal and vertical alignment with the first and second supporting walls 32 and 33 . High rigidity structure with joints. In this preferred embodiment, a pair of through holes 71 corresponding to the screw holes 341 of the four uprights 34 are formed on both side ends of each torsion bar 7 .
[0027] The locking unit 8 has four bolts 81 respectively passing through the four through holes 71 of the two torsion bars 7 to be locked in the screw holes 341 of the four uprights 34 , and four bolts 81 correspondingly locked to the ends of the four bolts 81 to The two torsion bars 7 are pressed against the nuts 82 on the fourth column 34 of the cylinder head 3 .
[0028] The first and second support walls 32 and 33 of the cylinder head 3 are designed as one piece, and the two torsion bars 7 connecting the uprights 34 on both sides of the first and second support walls 32 and 33 can be used to make the cylinder head The structural rigidity of 3 is greatly improved, which not only allows the second bearing 51 of the camshaft group 5 to have better concentricity, but also maintains the required rigidity to resist the adverse effects caused by thermal deformation. Because of the high rigidity of the structure of the present invention, the gap between the first and second rocker arms 61, 62 and the first and second support walls 32, 33 can be limited, so as to avoid the output effect of the cylinder caused by the enlargement of the gap. reduce. In addition, the two torsion bars 7 can also replace the originally required spacers 162 (see figure 1 ) to reduce the number of components used.
[0029] To sum up the above, the cylinder head device with torsion bars of the present invention utilizes the two torsion bars 7 to connect the first and second support walls 32 and 33 to enhance the structural rigidity and resist the adverse effects caused by thermal deformation. And make the camshaft group 5 run more smoothly, so the purpose of the present invention can indeed be achieved.
[0030] The above descriptions are only preferred embodiments of the present invention, which cannot limit the scope of the present invention. That is, any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the description of the invention still belong to the present invention. covered by the patent.
[0031] 【Description of main component symbols】
[0032] 3 ………………Cylinder head 52………………Spindle
[0033] 31………………Cylinder head body 53…………Cam
[0034] 32………………First support wall 6 ………………Rocker arm unit
[0035] 321 ………………Mounting holes 61………………First rocker arm
[0036] 33………………Second support wall 62…………Second rocker arm
[0037]331 ………………Mounting holes 7 ………………Torsion bar
[0038] 34………………Column 71………………Perforated
[0039] 341 ………………Threaded holes 8 …………Locking unit
[0040] 4 ………………Cylinder block 81………………Bolts
[0041] 5 ……………Camshaft group 82………………Nuts
[0042] 51………………Bearing 9 ………… Valve stem
