JP2563417Y2 - Main clutch piston with lubricating blades - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to lubrication of a direct-type main clutch device in a vehicle such as a bulldozer.
In particular, it relates to a main clutch piston with lubricating blades.

[0002]

2. Description of the Related Art For example, in the structure of a direct drive type main clutch as shown in FIG. 3, the power of an input shaft 31 directly connected to a power source (not shown) is applied to a housing 32,
The torque is transmitted to a clutch plate 34 via a torque pin 33 and is pressurized by a hydraulic piston 35 so that the disc 36 and the plate 34 are engaged, and an output shaft 38 is connected via a hub 37 fitted to the disc 36. To the direct mission on the right side of the figure. In this case, lubricating oil is supplied from the hydraulic circuit 39 to lubricate the disc 36, but the hub 37 rotates in normal engagement,
The lubricating oil is swung by the centrifugal force, and extends over the entire surface of the disk 36 through slits provided at several places on the circumference of the hub 37.

[0003]

[Problem to be solved by the invention]
In the case of a main clutch that receives a heavy load like
8 with little rotation
Is sometimes repeated, and the relative slip is repeated. In such a case, the hub 37 on which the lubricating oil falls does not rotate, so that the lubricating oil does not swing around the circumference of the hub 37 and flows downward, so that the entire surface of the disk 36 is not lubricated, and seizure is likely to occur. There is a defect. As means for solving this problem, there is provided a clutch housing 43 provided with a baffle plate 42 directly connected to an input shaft 41 for oscillating lubricating oil, as shown in FIG. Housing 4
3 is attached with bolts 44, which makes it difficult to balance rotation and the like, and has the disadvantage of increasing costs. In the figure, 45 is an output shaft.

In view of this, the present invention provides a main clutch piston with lubricating vanes which allows lubricating oil to spread over a desktop even when the output shaft is locked when engaged. This is done for the purpose of resolving.

[0005]

According to the present invention, as a means for solving the problems of the prior art, power from an input shaft directly connected to an engine is transmitted to a clutch plate via a housing and a torque pin. In a main clutch in which a disc and the clutch plate are engaged with each other by a pressurized hydraulic piston and transmitted to an output shaft via a hub fitted to the disc, a hydraulic pressure that rotates the same as the input shaft The piston is formed with hook-shaped blades for scraping up the lubricating oil flowing down.

[0006]

According to the above construction, since the hydraulic piston rotates in the same manner during the rotation of the input shaft, the lubricating oil accumulated between the hub and the hydraulic piston is scraped up by the blade and swung by the scraping. The lubricating oil lubricates between the disk and the clutch plate.

[0007]

FIG. 1 is a side sectional view of an embodiment of a main clutch piston with lubricating blades according to the present invention, and FIG. 2 is a front view of FIG.

The present invention will be described below with reference to an embodiment shown in FIGS. The present invention uses the power from the input shaft 1 directly connected to the engine side to the housing 2 and the torque pin 3.
The disc 6 and the clutch plate 4 are engaged with each other by the hydraulic piston 5 which is transmitted to the clutch plate 4 and pressurized, and the output shaft 8 is connected via the hub 7 fitted to the disc 6. In the main clutch, the hydraulic piston 5 that rotates in the same direction as the input shaft 1 is formed with hook-shaped blades 9 for scraping lubricating oil flowing down.

FIG. 1 shows an upper half in which the clutch piston 5 is inactive and a lower half in which it operates. The hydraulic pressure during operation is controlled by the circuit 11 of the cylinder shaft 10 provided outside the output shaft 8.
Pressurizing surface 13 between hydraulic piston 5 and stopper 12
Is to enter. The input shaft 1 is directly connected to an engine (not shown) via a coupling or the like, and the housing 2 is fixed to the input shaft 1 by bolts 14. FIG. 1 shows an annular portion provided near the outer periphery of the housing 2.
A plurality of the discs 6 and the clutch plates 4 are alternately arranged in order from the left side, and the hydraulic piston 5 is arranged to face the last disc 6. A stopper 12 for preventing the hydraulic piston 5 from moving to the right is provided on the right side of the hydraulic piston 5, and is fixed to the housing 2 by a bolt 15 at an outer peripheral portion. Also,
The torque pin 3 is inserted between the fixed housing 2 and the stopper 12 through the clutch blade 4, and the clutch plate into which the torque pin 3 is inserted is inserted.
The spring 16 is provided on the outer periphery of the torque pin 3
The spring 16 prevents the disk 6 from contacting the disk 6 when it is not engaged. Further, the inner diameter side of each of the disks 6 is engaged with a tooth portion provided on the outer periphery of the hub 7. Have been. The hub 7 and the hydraulic piston 5
An oil reservoir 18 is provided between the cylinder shaft 10 and the lubricating oil, which is supplied from a circuit 19 provided on the cylinder shaft 10. A slit (not shown) is provided between the outer circumference and the inner circumference of the tooth portion of the hub 7, and the lubricating oil in the oil reservoir 18 lubricates the clutch plate 4 and the disc 6 located on the lower side through this slit. Will be done. The hydraulic piston 5 is formed on the opposite side of the pressurizing surface 13 to a large-diameter portion in contact with the disk 6 and a small-diameter portion in contact with the oil sump 18. Are provided with a plurality of hook-shaped blades 9. In the figure, reference numeral 20 denotes a snap ring which partitions the oil reservoir 18 to make it difficult for the lubricating oil to escape from the oil reservoir 18, and 21 denotes a bearing.

Next, the operation will be described. When the main clutch is engaged, the clutch plate 4 and the disk 6 are in contact with each other, so that the power of the input shaft 1 is transmitted to the hub 7 and the output shaft 8 integrated with the hub 7 rotates to transmit a transmission (not shown). Drive. At this time, the lubricating oil in the oil sump 18 is swung by the blades 9 of the rotating hydraulic piston 5 and scatters from the inside to the outside through the grooves formed in the disk 6, thereby cooling the disk 6 and the clutch plate 4. High temperature is prevented. Next, when the main clutch is disengaged and the clutch is disengaged, the lubricating oil is scraped up by the rotating blades 9 of the hydraulic piston 5 in the same manner as when engaged, so that the disc 6 and the clutch plate 4 The disk 6 and the clutch plate 4 can be cooled more quickly than when the disk 6 and the clutch plate 4 are engaged.

Although the present invention has been described with reference to the embodiment in which the blades 9 provided on the hydraulic piston 5 are formed by casting, the blades 9 may be made of sheet metal and attached by bolts or the like.

[0012]

As described above, according to the present invention, the power from the input shaft directly connected to the engine is transmitted to the clutch plate via the housing and the torque pin, and the disk and the clutch are driven by the hydraulic piston which is pressurized. In a main clutch in which a plate is engaged and transmitted to an output shaft via a hub fitted to the disk, a lubricating oil flowing down to a hydraulic piston rotating in the same direction as the input shaft is scraped up. Since the hook-shaped blades are formed, lubricating oil can be automatically supplied to the disk and the clutch plate when the output shaft is locked, so that a costly baffle plate as in the conventional case is used. No longer needed
This is advantageous in cost.

[Brief description of the drawings]

FIG. 1 is an explanatory view in cross section of an embodiment of a main clutch piston with lubricating blades according to the present invention.

FIG. 2 is an explanatory view showing the front of the piston of FIG. 1;

FIG. 3 is an explanatory view in cross section showing the structure of a conventional main clutch.

FIG. 4 is an explanatory view of a conventional cross section showing an example in which a lubricating portion of the structure of the main clutch of FIG. 3 is improved.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input shaft 2 Housing 3 Torque pin 4 Clutch plate 5 Hydraulic piston 6 Disk 7 Hub 8 Output shaft 9 Blade

Claims (1)

(57) [Scope of request for utility model registration] Power is transmitted from an input shaft directly connected to an engine to a clutch plate via a housing and a torque pin, and a disc and the clutch plate are engaged by a hydraulic piston which is pressurized. In the main clutch, which is transmitted to the output shaft via a hub fitted with the disc, a hydraulic piston that rotates the same as the input shaft,
A main clutch piston with lubricating blades, wherein hook-shaped blades are formed for scraping down the lubricating oil flowing down.