JPS6257546B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch brake device for steering a tracked vehicle with improved maintainability.

In the power system of a conventional tracked vehicle, a steering clutch brake is provided on a horizontal shaft that transmits engine rotation to a final reduction mechanism.

In the above-mentioned steering clutch brake, the clutch and the lining of the brake wear out during long-term use, so the steering clutch brake is periodically disassembled and the disc etc. are replaced.

For this reason, various steering clutch brakes that are easy to maintain have been proposed.

For example, Utility Model Application Publication No. 55-50804, Japanese Patent Application Publication No. 55-44017, etc.

However, when maintaining conventional steering clutch brakes, it is necessary to remove the housing housing the clutch brake assembly from the horizontal shaft case and then disassemble the clutch and brake individually. The brakes are also large and heavy, so it takes a lot of time and effort to install and remove them.
There were problems such as poor maintenance.

There are also models that allow the clutch brake assembly to be disassembled without removing the housing from the horizontal shaft case, but in this case, even if only the disk of the brake assembly located at the back of the housing is replaced, the clutch on the front side There were problems such as the assembly had to be disassembled and a large number of man-hours were required for disassembly and reassembly.

This invention was made for the purpose of improving the above-mentioned problems, and is a clutch brake for steering tracked vehicles that allows only the clutch brake assembly to be easily taken out from inside the housing, and that it can be assembled and disassembled independently. The aim is to improve maintainability by providing equipment.

The present invention will be described in detail below with reference to one embodiment shown in the drawings. In the drawing, 1 is a main body of this device mounted on a tracked vehicle (not shown), and a clutch assembly 2 and a brake assembly are housed in a housing 1a. 3 is accommodated. The clutch assembly 2 has an outer drum 5 with a flange 5a splined to the end of the input shaft 4, and the outer drum 5 is removably fixed to the flange 5a by a fastener 6. A spline 5b is formed on the inner circumferential surface of the outer drum 5, and the outer circumference of a disk 7 having a lining 7a formed on both sides is engaged with the spline 5b, and a plate 8 is disposed between these disks 7. They are arranged alternately.
The inner peripheral portions of these plates 8 are splined to the inner drum 9. The inner drum 9 is fixed to a sleeve member 9a spline-engaged with the end of the output shaft 10 disposed on the same center as the input shaft 4, and a collar portion 9b protruding from the outer periphery of the sleeve member 9a. It consists of an inner drum part 9c fixed by a tool 11, and a flange 9d is protruded from the outer periphery of the inner drum part 9c at approximately the middle part, and this flange 9d
Splines 9e and 9f are formed on both sides of the plate 8, and the plate 8 is attached to one spline 9e.
A disk 18 of a brake assembly 3, which will be described later, is engaged with the other spline 9f, respectively. Further, an oil passage 9g is formed in the sleeve member 9a of the inner drum 9, and is connected to an oil passage 1c formed in the end plate 1b of the housing 1a via the sleeve member 11.
g reaches into the inner drum part 9c from the inside of the flange part 9b, and each disk 7, 18 of the clutch assembly 2 and the brake assembly 3, A portion of the oil is injected between the plates 8 and 20 to lubricate and cool them. In addition, 9g of oil path
One end is supplied into a hydraulic chamber 14b through an oil passage 14a in a cage 14 which is removably attached to the end of the sleeve member 9a by a fixing member 13, and the piston 15 is moved against a compression spring 16 to disengage the clutch. A portion of the bearing 17 and the spline 4 of the input shaft 4 are pressed in the direction through the aperture 17a formed in the spring retainer 17 and the through hole 5c formed in the flange portion 5a of the clutch outer drum 5.
a and is designed to lubricate these.

On the other hand, in the brake assembly 3, a brake outer drum 19 is provided around a disk 18 that is spline-engaged with an inner drum portion 9c of the inner drum 9. The outer peripheries of the plates 20 alternately arranged between the plates 18 are engaged with splines. Further, the brake outer drum 19 is attached to a holding plate 21 by a fixing member 30 to a cylindrical portion 1d protruding from the inner surface of the end plate 1b of the housing 1a.
Bearings 22a and 2 are attached to the inner drum part 9c in a removable manner.
A cage 23 is provided which supports the sleeve member 9a via the cage 2b.

The cage 23 is detachably fixed to the end plate 1b by a fixing member 24, and has an oil passage 23a inside that communicates with the oil passage 1c in the end plate 1b. The hydraulic pressure supplied to the chamber 23b causes the piston 26 to move against the compression spring 25.
is pressed in the brake release direction.

Next, disassembly and assembly of the clutch assembly 2 and brake assembly 3 will be explained. First, during disassembly, by removing the fasteners 27 attached to the end plate 1b of the housing 1a, the clutch assembly 2 and brake assembly 3 can be taken out from inside the housing 1a in the state shown in FIG. To disassemble the clutch assembly 2 from its condition, the fasteners 28 (shown in FIG. 2) attaching the spring retainer 17 to the cage 14 are removed. As a result, all of the main parts of the clutch assembly 2 can be removed from the clutch inner drum 9 and the cage 14, as shown in FIG. 3, and the clutch assembly 2 can be easily disassembled.

Next, the brake assembly 3 is disassembled using the fixing tool 3 that attaches the brake outer drum 19 to the end plate 1b.
0, and remove the fixing tool 31 that attaches the inner race of the bearing 22a and the fixing member 29 to the inner drum 9a. As a result, all of the main parts of the brake assembly 3 can be removed from the inner drum 9 as shown in FIG. 4, and by removing the fasteners 24 that attach the cage 23 to the end plate 1b, As shown in FIG.
The compression spring 25 can then be removed, and the piston 26 can also be removed from the cage 23.

The above is the clutch assembly 2 and brake assembly 3.
This is a disassembly work, but the assembly can be carried out in the reverse order of the disassembly described above, and it can be easily assembled with a small number of man-hours as in the disassembly. 3, the clutch assembly 2 and the brake assembly 3 can be easily aligned by each spline 9e, 9f of this inner drum 9. In addition, the fixing devices 28 and 30 that attach the spring retainer 17 and the brake outer drum 19 have sufficient length so that the connected state of each component can be maintained even after the set pressure of the compression springs 16 and 25 is released. Because of this, the parts will not bounce due to the set pressure of the compression springs 16, 25 during disassembly, and during assembly, the compression springs 16, 25 can be compressed after the parts are installed, so it is possible to use a hydraulic press for compressing springs, etc. does not require.

As described in detail above, this invention is provided with an inner drum that is spline-engaged with the output shaft, and a clutch assembly and a brake assembly are respectively assembled to the inner drum part of the inner drum. Both the clutch assembly and the brake assembly can be taken out as one unit, and either the clutch assembly or the brake assembly can be selectively disassembled. Moreover, since most of the main parts of the clutch assembly can be removed from the inner drum by simply removing a few fasteners, disassembly and assembly work can be carried out efficiently with fewer man-hours.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being an overall sectional view, and FIGS. 2 to 5 being operational explanatory views showing the order of disassembly. 1a is a housing, 1b is an end plate, 2 is a clutch assembly, 3 is a brake assembly, 4 is an input shaft, 7,
18 is a disk, 8 and 20 are plates, 9 is an inner drum, 9a is a sleeve member, 9c is an inner drum part, 14 and 23 are cages, 16 and 25 are compression springs, 19 is a brake outer drum, 30 and 24
is a fastener.

Claims (1)

[Claims] 1. The inner drum 9 is spline-engaged to the output shaft 10 side of the input shaft 4 and output shaft 10 that are butted together in the housing 1a, and the clutch assembly 2 and the brake assembly 3 are connected to the inner drum portion 9c of the inner drum 9. The plate 8 and the disk 18 are respectively spline-engaged, and the disk 7 provided between the plates 8 is connected to the clutch outer drum 5 which is spline-engaged to the input shaft 4 side, and the plate 20 provided between the disks 18 are spline-engaged to the brake outer drum 19 which is removably attached to the end plate 1b of the housing 1a by a fixing member 30, and to the cage 14 which is attached to the sleeve member 9a of the inner drum 9 by a fixing member 13, respectively. The disk 7 is compressed by the compression spring 16.
and the piston 15 urged toward the plate 8 side,
The clutch brake device for steering a tracked vehicle is provided with a cage 23 attached to the end plate 1b side by a fixing member 24, and a piston 26 biased toward the disk 18 and plate 20 side by a compression spring 25, respectively.