JPS5817857B2 - Lever mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lever mounting device, and more particularly to a device for providing a variable friction device capable of precisely positioning a control lever.

Some earthmoving machines are equipped with sleeve metered fuel injectors (see, eg, US Pat. No. 3,385,221).

Such a fuel system greatly reduces the force required to change fuel settings using a governor control.

In such systems, the associated governor control linkage does not have sufficient frictional force to maintain the governor from changing fuel settings due to machine vibrations.

Therefore, the machine operator must constantly readjust the governor control lever to the desired speed setting.

Machines with conventional swirl fuel injectors require sufficient force to adjust the fuel settings so that the fuel injector is not susceptible to changes resulting from mechanical vibrations.

However, as discussed above, this is not the case with machines equipped with sleeve metered fuel injectors.

Various friction devices for lever mounting are of course known (e.g. U.S. Pat. No. 3,439,557 and U.S. Pat. No. 34
77308).

Although these friction devices have been found to be effective for their design purposes, it will be appreciated that it is always desirable to improve the working efficiency of the device while keeping the design of the device as simple as possible. Dew.

Related in this regard is Parks et al. US Pat. No. 2,841,000.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a friction lever mounting device that allows the lever position to be maintained properly as desired.

Another object of the invention is to achieve the above objects and to include an adjustment device for varying the frictional force applied to the lever, so that such a frictional force can be selected according to any needs of the overall device. The lever installation consists in providing the device.

A further object of the present invention is to provide a friction lever mounting device which achieves each of the above objects and which is extremely simple to design and manufacture.

The present invention comprises a lever mounting device including a first end member device and a shaft fixed relative to and extending from the first end member device.

The lever arm has a base with a hole disposed therethrough, and the lever arm is pivotable about a longitudinal axis of the shaft.

A friction material arrangement is disposed between the base and the first end member arrangement, and the second end member arrangement has an aperture for disposing the shaft therethrough.

The second end member arrangement is disposed on the side of the base opposite the first end member arrangement.

The second end member arrangement is movable along the longitudinal axis of the shaft and relative thereto.

A friction material device is disposed between the base and the second end member device.

Also provided is a device for retaining the second end member device on the shaft.

These and other objects of the invention will become clear from the following description made with reference to the drawings.

FIG. 1 shows a governor control lever arm 10 mounted on a structure 12 forming part of the driver's seat assembly (not shown).
It is shown.

Lever 10 connects to a governor control linkage 14.

The end member 16 is attached to the plate 1 of the structure 12 using a cap screw 20.
It settles on 8.

A shaft 22 is secured to the end member 16 by means of a roll pin 24, which shaft extends from the end member 16 and whose opposite end is positioned by a block 26 secured to a plate 28, for example by welding.

Lever arm 10 has a base 30 with a hole 32 through which shaft 22 passes.

The lever arm 10 is pivotable about the longitudinal axis of a shaft 22, which is mounted by a needle bearing 34.

A washer 36 and an annular friction disk 38 define a hole through which the shaft 22 passes, and the washer 36 and friction disk 38 are disposed between the end member 16 and the base 30.

The shaft 22 has a reduced diameter portion 40 .

The second end member device in the form of washers 42, 44 defines holes 46, 48 through which the reduced diameter section 4 of the shaft is inserted.
0 is placed.

Washers 42 , 44 are located opposite the end member 16 with respect to the base 30 and are movable along the longitudinal axis of the shaft 22 .

The reduced diameter portion 40 of the shaft 22 is a machined flat portion 50.
has.

The bore 46.48 of the washer 42.44 is shaped to cooperate with said flat surface so that the washer 42.44 is fixed against rotation with respect to the shaft 22 about its longitudinal axis.

3' annular friction disks 52, 54, 56 are connected to the shaft 22.
A hole is formed through which the diameter-reduced portion 40 passes.

The washer 58 defines a hole 60 through which the reduced diameter portion 40 passes, and the washer 62 defines a hole 64 through which the reduced diameter portion 40 passes.

Friction discs 52, 54.56 are mounted between end member arrangement 42.44 and base 30, with washer 58 disposed between friction discs 52.54 and washer 62 between friction discs 54.56.

Each of the friction discs 52, 54, 56 and washers 58, 62 are movable along the longitudinal axis of the shaft 22.

The bore 64 of the washer 62 is shaped to cooperate with the flat surface 50 of the reduced diameter section 40 so that the washer 62 is fixed against rotation with respect to the shaft about its longitudinal axis.

The other washer 58 has a hollow member 66 connected to the base 30.
extends such that washer 58 rotates with the base about the longitudinal axis of shaft 22.

Washers 42,44 and other associated structures are attached to retaining member 70.
Be1l-ev
The spring pack 68 is positioned on the shaft 22 by a spring pack 68 .

A washer 72 is disposed on the retaining member 70 and an adjustment nut 74
is screwed onto the shaft 22 and rotated about the shaft so as to move along the shaft 22.

Spring pack 68 is positioned between nut 74 and washer 42 to urge washer 42 toward end member 16.

The manner in which the friction disks and associated washers are arranged allows considerable frictional forces to be generated in a relatively compact configuration.

The desired actual frictional force can be set differently by means of an adjusting nut 74, which can vary the magnitude of the spring force generated within the spring pack 68.

The overall design of this clutch assembly is quite compact and can be easily fitted into existing spaces.

Such devices can be easily adjusted to provide the appropriate amount of frictional torque depending on the application of the device.

Of course, this device is pre-assembled before installation.

Embodiments of the invention include the following:

(1) In the claims, a shaft is fixed to a first end member device, the device for holding the second end member device on the shaft includes an adjustment device movable along the shaft; and a resilient device disposed between the second end member devices to urge the second end member device toward the first end member device.

(2) In paragraph (1) above, the friction material device disposed between the base and the second end member device comprises a plurality of annular friction disks, each disk defining a hole through which the shaft passes. each disc is movable along the longitudinal axis of the shaft relative to it, and includes a washer disposed between each adjacent pair of friction discs, each of said washers being movable relative to the shaft. It can move relative to it along the vertical axis.

(3) In item (2) above, the second end member device comprises an annular end shuttle device fixed so as not to rotate relative to the shaft about the longitudinal axis of the shaft.

(4) In item (3) above, the plurality of annular friction disks consists of three friction disks, and the washers arranged between adjacent pairs of friction disks consist of a first and a second washer, and these One of the first and second washers is coupled to the base for rotation therewith about the longitudinal axis of the shaft.

(5) In item (4) above, the other one of the first and second washers is fixed so as not to rotate relative to the shaft around the longitudinal axis of the shaft.

[Brief explanation of the drawing]

Figure 1 is a side elevational view of a lever in which the friction mounting device of the present invention is combined, the vehicle diagram is a sectional view taken along the line ■-■ in Figure 1, and Figure 3 is a cross-sectional view taken along the line in Figure 2. It is a sectional view taken on III-Ill. DESCRIPTION OF SYMBOLS 10... Governor control lever arm, 14... Governor control link mechanism, 16... End member, 18... Plate, 22... Shaft, 24... Roll pin, 26...
...Block, 30...Base, 32...Hole, 34.
... Needle bearing, 36 ... Washer, 38 ... Annular friction disk, 40 ... Reduced diameter part, 42.44 ... Washer or second end member device, 46.48 ... Hole, 50... Plan view, 52, 54, 56... Annular friction disk, 58...
- Washer, 66... Middle member, 68... Spring pack, 70... Holding member, 72... Washer, 74... Adjustment nut.

Claims (1)

[Claims] 1 a first end member arrangement and a shaft secured to and extending from the first end member arrangement having a base defining an aperture through which the shaft passes and pivoting about a longitudinal axis of the shaft; a lever arm of the base and a friction material device disposed between the base and the first end member device, defining an aperture through which a shaft passes, the lever arm being located on the opposite side of the base from the first end member device; a second end member arrangement movable relative to the longitudinal axis of the shaft, the second end member arrangement being non-rotatable relative to the shaft about the longitudinal axis of the shaft; and a friction material device disposed between the base and the second end device, and a device for retaining the second end device on the shaft; The arranged friction material device consists of first, second and third friction discs each mounted on the shaft for movement along the longitudinal axis of the shaft, and between the first and second friction discs. a first washer disposed on the shaft; a second washer disposed on the shaft between second and third friction discs and movable along the longitudinal axis of the shaft; in contact with the base, a third friction disk in contact with a second end member arrangement, a second washer coupled to the base for rotation with the base about the longitudinal axis of the shaft, and a third friction disc in contact with the base; A lever mounting device characterized in that the lever is fixed around the longitudinal axis of the shaft so as not to rotate relative to the shaft.