JPH03484Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a spacer fitted to a rocker shaft for mounting a rocker arm of an internal combustion engine.

[Conventional technology]

Conventionally, a rocker arm assembly as shown in FIG. 6 has been used. Lotsuka arm 10
is rotatably attached to the rock shaft 12,
The rocker shaft 12 is secured to a cylinder head (not shown) by a rocker support 14. In order to position the rocker arm 10, a spacer 16 (only two spacers are shown in FIG. 6) is arranged on one side of the rocker arm 10.
A spring 18 is arranged on the other side of 0. The spacer 16 is formed as a cylindrical body and is fitted into the rocker shaft 12. The rocker arm 10 is pressed against the rocker support 14 via the spacer 16 by a spring 18, and thus its position is determined.

[Problem that the invention attempts to solve]

To attach the rocker arm 10 to the cylinder head, first attach the rocker shaft 12 to the rocker support 1.
4. Insert into the spacer 16, rocker arm 10 and spring 18 to form a rocker arm assembly, place this assembly on the cylinder head, and tighten a head bolt (not shown) through the hole 14a of the rocker support 14. This is done by Removal of the rocker arm 10 and the like is accomplished by loosening the head bolt, removing the rocker arm assembly from the cylinder head, and then pulling out the rocker shaft 12. By the way, the spacer 16 may wear out under poor lubrication conditions such as when deteriorated oil is used, and as a result, the rocker arm 10 may shift from its normal position and generate noise. In such a case, the problem can be resolved by replacing only the spacer 16. However, in order to replace the spacer 16, the entire rocker arm assembly must be disassembled as described above, which requires a large number of man-hours.

[Means for solving problems]

In the present invention, the spacer is formed to be splittable in the radial direction, and therefore, the spacer can be attached and detached without removing the rocker shaft.

〔Example〕

FIG. 1 shows the spacer 26 fitted to the rocker shaft 12. This spacer 26 can be used for positioning the rocker arm as shown in FIG. The spacer 26 is not only used for such positioning, but can also be used for other purposes, for example, as a spacer for preventing valve train noise. As shown in FIGS. 2 and 3, the spacer 26 according to the present invention is formed by two spacer halves 26a and 26b divided in the radial direction, and the relative orientation of these spacer halves 26a and 26b is inner edge 2
6c and 26d are thinner than their main bodies so that they can be stacked on top of each other. When these inner edge portions 26c and 26d are overlapped, a circular spacer 26 having a uniform thickness as shown in FIG. 1 is obtained.

A pin 28 extending in the axial direction is embedded in the inner edge 26c of one spacer half 26a, and a hole 30 corresponding to the pin 28 is provided in the inner edge 26b of the other spacer half 26b. Therefore, when stacking the two spacer halves 26a and 26b, the pin 2
8 is inserted into the hole 30, thus joining the two spacer halves 26a, 26b together. pin 28
spacer halves 26a, 26b joined by
can move in the axial direction. However, when assembled as shown in FIG. 6, the two spacer halves 26a, 26b are pushed in the axial direction by the spring 18, so they do not separate. When it is desired to remove the spacer 26 from the rocker shaft 12 for replacement or the like, the pin 28 can be pulled out from the hole 30 by applying a force greater than the spring force of the spring 18, leaving the rocker arm assembly assembled. In this state, attach the spacer 26 to the shaft 1.
It can be removed from 2. The same applies when attaching the spacer 26 to the rocker shaft 12.

In the embodiment shown in FIGS. 4 and 5, the spacer 26 is comprised of two spacer halves 26a, 26b similar to the embodiment of FIGS. 1-3. An annular groove 26e is formed on the outer periphery of these spacer halves 26a, 26b, and the snap ring 32 is fitted into this groove 26e. This snap ring 32 connects the two spacer halves 26a and 26b, and by removing the snap ring 32, the spacer 26 is divided and can be removed from the rocker shaft 12.

[Effect of idea]

As explained above, according to the present invention, the spacer fitted to the rocker shaft can be easily removed in a short time while the rocker arm assembly is fixed to the cylinder head, which greatly improves work efficiency. is obtained.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a first embodiment of a spacer according to the present invention, and FIG. 2 is a plan view of a first embodiment of the spacer of the present invention.
FIG. 3 is a side view, and FIG. 4 is a plan view of the second embodiment of the present invention.
FIG. 5 is a side view, and FIG. 6 is a diagram showing a conventional rocker arm assembly. 10...Rotsuka arm, 12...Rotsuka shaft, 14...Rotsuka support, 18...Spring, 26...Spacer, 26a, 26b...Spacer half, 28...Pin, 32...Snap spring.

Claims (1)

[Scope of utility model registration request] A locking shaft fitting spacer is a spacer fitted to a locking shaft for attaching a locking arm, and is formed to be splittable in the radial direction.