JPH0372507B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering clutch brake device for a tracked vehicle that facilitates disassembly and assembly.

As a conventional steering clutch brake device for a tracked vehicle, the one described in, for example, Japanese Unexamined Patent Publication No. 53-5363 is known. This product has a structure in which the first housing containing the clutch assembly, the second housing containing the brake assembly, and the third housing containing the final drive assembly are connected with bolts, etc. The clutch housing as well as the clutch assembly had to be removed from the car body, resulting in a problem that required a lot of time and effort to repair.

This invention was made for the purpose of improving this problem, and it is a tracked vehicle in which the clutch assembly, brake assembly, etc. can be removed together with the flange while the clutch housing, which has a low failure frequency, remains on the vehicle body. It is an object of the present invention to provide a steering clutch and brake device that facilitates disassembly and assembly, and at the same time improves the cooling effect of the clutch assembly and brake assembly during operation.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the power system of a tracked vehicle, in which the output of an engine a is transmitted to a horizontal axis d via a transmission b and a bevel gear c. On the horizontal axis d, the main bodies 1 of a steering clutch brake device, which will be described later, are installed independently on the left and right sides, and the power transmitted by these main bodies 1 is transmitted to the sprocket f via the final reduction device e, and the power is transmitted by the sprocket f to the sprocket f. A crawler track (not shown) is rotated to allow the vehicle to travel. Further, the main body 1 includes a clutch housing 2a having a split structure (or may be integrated) and a brake housing 3 having an integrated structure.
A flange 4 is interposed between these housings 2a and 3a, and the three are connected by a fixing member 5. Of the housings 2a and 3a divided by the flange 4, the clutch assembly 2 is housed in the clutch housing 2a, and the brake assembly 3 is housed in the brake housing 3a. The clutch assembly 2 has a clutch outer drum 2c that is integrated with an input shaft 2b, and the outer peripheral portions of a plurality of discs 2d are spline-engaged with the inner peripheral surface of the clutch outer drum 2c. A plurality of plates 2f whose inner peripheral portions are spline-engaged with the clutch inner drum 2e are interposed between the clutch inner drum 2d.
The clutch inner drum 2e is fixed by a fixing member 8 to one end of a hollow connecting shaft 7 supported via a bearing 6 on a hollow shaft 4a projecting from the center of the flange 4. Further, the clutch inner drum 2e includes a clutch hydraulic oil passage 4b formed in the flange 4, a clutch hydraulic oil passage 7a formed in the hollow connecting shaft 7, and a clutch hydraulic oil passage 7a formed in the clutch inner drum 2e. A clutch push plate 2l that is operated by hydraulic oil introduced into the pressure chamber 2k via the hydraulic oil flow path 2g is slidably provided. The clutch press plate 2l is biased toward the disc 2d and plate 2f by a clutch spring 2n interposed between the press plate 2l and the spring retainer 2m, presses them together, and receives the power input from the input shaft 2b. The pressure is transmitted to the clutch inner drum 2e via the outer drum 2c, the disk 2d and the plate 2f, and the hydraulic oil supplied to the pressure chamber 2k causes the clutch to move backward against the clutch spring 2n. It is configured to release the pressure contact between 2d.

Reference numeral 20 denotes a clutch cooling oil reservoir formed in the clutch inner drum 2e, which communicates with a clutch cooling oil passage 4c formed in the hollow shaft 4a of the flange 4, so that the cooling oil reaching this oil reservoir 20 The oil flows between the plate 2f and the disk 2d through the oil hole 2p and cools them.
Further, the spline inner diameter of the clutch outer drum 2c and the outer diameter of the spring presser 2m are dimensioned to provide a clearance fit. On the other hand, the brake assembly 3 housed in the brake housing 3a has a brake inner drum 3b fixed to the other end side of the hollow connecting shaft 7 by a fixing member 8, and the outer peripheral part of the brake inner drum 3b is fixed to the other end side of the hollow connecting shaft 7. A plurality of disks 3c are spline engaged with each other. Between these discs 3c is a plate 3e whose outer periphery is spline-engaged with the brake outer drum 3d.
is mediated. Further, the brake outer drum 3d is fixed to the flange 4 by a fixing member 9, and a brake pressing plate 3g is provided in the brake outer drum 3d, which is biased toward the disk 3c and the plate 3e by a brake spring 3f and presses them together. is accommodated. The brake pressing plate 3g is supported by a cylinder member 3h supported by a hollow shaft 4a of the flange 4, and the pressure chamber 3 of the cylinder member 3h is
i is configured to retreat against the brake spring 3f by the brake hydraulic fluid introduced through the brake hydraulic fluid flow path 4d to release the brake. A spline-engaged output shaft 10 is housed in the inner peripheral portion, and the power input from the input shaft 2b is extracted from the output shaft 10.

In addition, 3k in the figure is a brake cooling oil reservoir formed in the brake inner drum 3b, and a brake cooling oil flow path 4 formed in the hollow shaft 4a of the flange 4.
The cooling oil that reaches this oil reservoir 3k flows through the oil hole 3l to the disk 3c and the plate 3.
It is designed to cool these by flowing between them. 4f in the figure is a bearing lubricating oil flow path, and oil supplied to this flow path 4f flows as indicated by arrow a to lubricate each bearing.

However, when the vehicle goes straight, the left and right clutches are engaged,
Stop by turning the left and right clutches ``off'', turning the brake ``on'', and turning left by turning the left clutch ``off'', turning the brake ``on'', turning the right clutch ``on'', turning the brake ``off'', and stopping. Turning to the right is performed by turning the left clutch ``on'' and the brake ``off'', and the right clutch ``disengaging'' and the brake ``on'' as in the past, so a description thereof will be omitted, and assembly and disassembly will be described in detail next. In disassembling the steering clutch brake device assembled in the state shown in FIG. Remove the flange 4 and brake housing 3a from the clutch housing 2a. When the flange 4 and brake housing 3a are pulled out in this state, the clutch housing 2 is attached to the vehicle body side as shown in FIG.
The insides of the brake assembly 3 and the clutch assembly 2 can be loosened and removed together with the flange 4 while leaving the clutch outer drum 2c and the clutch outer drum 2c.
Next, when the fastener 8 is loosened in this state, the flange 4
The brake inner drum 3b can be removed as shown in FIG. 4, leaving the disc 3c and plate 3e of the brake assembly 3, the brake press plate 3g and brake spring 3f that press them together, on the side. At the same time, from the flange 4, the hollow connecting shaft 7
By pulling out the hollow connecting shaft 7, the clutch inner drum 2e, disk 2d, plate 2f, spring retainer 2m, etc. of the clutch assembly 2 can be removed as well.

The above is the disassembly procedure, but the maintenance and assembly procedure can be carried out in the reverse order of the above disassembly.The procedure will be explained next by attaching the brake assembly 3, which has been removed from the flange 4, to the flange 4 with the fixing tool 9, and then The parts of the clutch assembly 2 excluding the clutch outer drum 2c are attached to the hollow connecting shaft 7. Next, insert one end of the hollow connecting shaft 7 to which the clutch assembly 2 is attached into the through hole in the center of the flange 4, and attach the brake inner drum 3b of the brake assembly 3 to the end of the hollow connecting shaft 7 with the fixing tool 8.
to integrate the clutch assembly 2 and brake assembly 3. Next, after fixing the brake housing 3a to the outer surface of the flange 4 with the fixing tool 5 and assembling it into the state shown in FIG. Push the clutch assembly 2 into the clutch outer drum 2c as a guide. When the clutch assembly 2 is stored in a predetermined position, the fixing device 5 is screwed into the flange 4 to fix the flange 4 to the end face of the clutch housing 2a, and then the output shaft 10 is inserted into the hollow connecting shaft 7. to finish the assembly.

As described in detail above, the present invention includes a flange interposed between a clutch housing housing a clutch assembly and a brake housing housing a brake assembly, and a hollow connecting shaft is rotatably supported in the center of the flange. At the same time, since the clutch inner drum of the clutch assembly is attached to one end of the hollow connecting shaft and the brake inner drum of the brake assembly is attached to the other end, a fixing device for connecting the clutch housing, brake housing, and flange is provided. The clutch assembly and brake assembly can be removed from the vehicle body along with the flange by simply removing the flange, making it easy to disassemble and reassemble the clutch assembly and brake assembly, allowing for efficient inspection, maintenance, and repair. . In addition, an oil reservoir is provided in each inner drum of the clutch assembly and brake assembly, and this oil reservoir supplies oil between each disc and plate for cooling, which efficiently reduces the heat generated during operation. It can be cooled well, which prevents the lining from seizing, further improving the durability of the clutch assembly and brake assembly, and reducing the outer diameter of the spring retainer of the clutch assembly. The spline inner diameter of the clutch outer drum is dimensioned to have a clearance fit relationship, so when assembling the clutch assembly and brake assembly to the vehicle body, the inner circumference of the spline will serve as a guide when inserting the spring retainer, making the assembly process easier. can be easily done in a short time.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a schematic diagram of the power line, FIG. 2 is a cross-sectional view of the steering clutch brake in an assembled state, and FIGS. 3 and 4 are explanations of the operation during disassembly and assembly. It is a diagram. 2 is a clutch assembly, 2a is a clutch housing, 2b is an input shaft, 2c is a clutch outer drum, 3 is a brake assembly, 3a is a brake housing, 4 is a flange, 7 is a hollow connecting shaft, and 10 is an output shaft.

Claims (1)

[Claims] 1 Clutch housing 2a provided on the vehicle body side
A flange 4 is removably provided in the opening of the flange 4, and a hollow connecting shaft 7 spline-engaged with the output shaft 10 is provided in the center of the flange 4 so as to be rotatable and removable.
The clutch assembly 2 excluding the clutch outer drum 2c provided on the input shaft 2b side is placed on the clutch housing 2a side of the hollow connecting shaft 7, with the disk 2d and plate 2f sides of the clutch assembly 2 facing the flange 4 side. It is removably installed so that the
A brake assembly 3 is detachably attached to the opposite end of the hollow connecting shaft 7, and this brake assembly 3 is detachably attached to the flange 4 and covered with a brake housing 3a, and the clutch assembly 2 Oil reservoirs 20 and 3k are provided in the clutch inner drum 2e of the brake assembly 3 and the brake inner drum 3b of the brake assembly 3, respectively.
The oil within 0.3k cools the discs 2d, 3c and plates 2f, 3e of the clutch assembly 2 and brake assembly 3, and also cools the clutch assembly 2.
Clutch the outer diameter of the spring presser 2m.
When assembling the clutch assembly 2 and brake assembly 3 with a clearance fit with the spline inner diameter of c,
A steering clutch brake device for a tracked vehicle in which the inner periphery of the spline serves as a guide when inserting a 2m spring retainer.