JPH0444932Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a power transmission device for direct power shift vehicles such as motor graders, bulldozers, and shovels.

[Conventional technology]

In FIG. 3, power from a flywheel 01 is transmitted to an output shaft 04 via a spline machined into a hub 03 that is integrated with a damper disk 02. In order to obtain the durability of the spline part, it is necessary to make the inside of the housing wet, and the oil filler port 05, level gauge 06, oil drain 0
7. Oil seal 08, gasket 09, and oil 010 are installed.

[Problem that the invention attempts to solve]

(1) The output of the engine is generally a dry type. Therefore, making the inside of the housing wet requires changing the specifications of the engine, which increases costs.

(2) In order to ensure the durability of the spline joint between the damper disk and the output shaft, it is necessary to make the inside of the housing wet, and as a result, the conventional oil filler port 05, level gauge 06, and oil drain 0
7. It is necessary to install oil seal 08, gasket 09, oil 010, etc., which leads to a significant increase in costs.

(3) Vehicles not only need to have openings for fuel fillers, level gauges, and oil drains, but also require maintenance such as inspection and maintenance.

[Means for solving problems]

The damper disk attached to the engine's flywheel and the output shaft attached to the housing assembly are separated when assembled, and in order to make their connection parts (splines) grease-filled, (1) Drive a plate as a grease stopper into the engine side end face of the damper disc hub (a stopper such as a pinion cutter can also be used) to seal it.
Machining the seal contact surface on the outer peripheral surface on the opposite side.

(2) Fit a boss for sealing grease onto the above packing contact surface and the outer periphery of the output shaft.

[Effect]

The inside of the housing is made dry by making the connecting portion between the damper disk and the output shaft a grease-filled spline fitting.

〔Example〕

In Fig. 1, power from an engine is transmitted to an output shaft 3 via a spline a machined in a damper disk hub 2 attached to a flywheel 1, and then to a transmission. . The output shaft 3 and the housing 4 constitute a housing assembly.

During assembly, the spline a of the damper disk hub 2 attached to the flywheel 1 of the engine and the spline a machined on the output shaft 3 of the housing assembly are connected, so grease the spline fitting part. In order to use the sealed type, (1) attach a grease stopper 5 to the end face of the damper disc hub 2;
or damper disc hub 2.
As shown in Fig. 2, it is made into a stop using a pinion cutter or the like, and a sealing surface b is constructed on the outer peripheral surface of the opposite end. (2) Attach the boss 6 using the spline a machined on the output shaft 3,
Gaskets 9 and 10 are provided on the left and right sides of the boss 6 to prevent grease from leaking. Boss 6 when combined
By filling the inner surface of the spline a with grease c, the spline a has a structure in which grease leakage is prevented by the role of the gaskets 9 and 10, and durability can be ensured.

[Effect of idea]

By making the flywheel damper chamber dry, (1) there is no need for oil fillers, level gauges, oil drains, oil seals, gaskets, oil, etc., resulting in significant cost reductions.

(2) Vehicles also do not require inspection or maintenance, which is a selling point.

(3) The engine can be made in common with the general specifications for trucks (using a dry type eliminates the need for special seals), resulting in cost reduction.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a damper disk assembly as an embodiment of the present invention, and FIG. 2 is a sectional view showing another embodiment of the damper disk hub of the device of the present invention.
FIG. 3 is a sectional view of a damper disk assembly as an example of a conventional example. 1... Flywheel, 2... Damper disc hub, 3... Output shaft, 4... Housing, a...
spline.

Claims (1)

[Scope of utility model registration request] In a power transmission mechanism having a flywheel damper disk that receives power from an engine, an output shaft is spline-fitted to the inner periphery of the damper disk hub to create a sealed space surrounded by the hub and the end surface of the output shaft. A grease chamber is formed between the inner circumference of the boss and the outer circumference of the output shaft by forming a boss on the outer periphery of the damper disk hub opposite to the sealed side and on the output shaft, and creating a grease chamber that is connected to the spline and filled with grease. 1. A power transmission device characterized in that the grease chamber is formed with gaskets on both sides of the grease chamber for sealing the grease chamber.