JPS58209660A - Steering unit setting mechanism for crawler vehicle - Google Patents

Abstract

PURPOSE:To facilitate setting and removing of a steering crawler body to the vehicle body, by forming a housing hollow part opened upwardly at the rear part of a body, then by setting a steering case so as to be freely attached to and removed from said case. CONSTITUTION:Each of rear parts 2' of a pair of right and left main frame bodies 2 in a car body 1 made as a longitudinal board, and a lower part and a rear connecting wall 6, 7 are connected together to make a housing space 8 which is opened upwardly. Moreover, each setting seat 9 for setting final reduction gear case 27 of a final reduction gear device 26 is provided on the outer surface 2' a of a pair of rear side 2'. The output shaft 11 of an engine 10 is connected to an input shaft of a torque convertor 23 set on a reduction gear 13 through a joint 12, then a steering unit 14 is detachably connected to an output side of a reduction gear device 13. Further, the steering unit 14 is set in the housing space 8. At this time, circular projecting parts 18 of left and right sides of steering case 16 are coupled with receiving part 19 fixed on the inner face of the rear part 2'.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure in which a steering device for transmitting power from a speed reducer to left and right final speed reducers in a tracked vehicle is attached to a vehicle body.

Conventionally, this type of steering device has a pair of left and right steering clutches on both sides of a horizontal shaft equipped with bevel gears.

It is equipped with a brake and is attached to the vehicle body as shown in FIGS. 1 and 2.

A pair of main frames h, h are integrally provided in a hollow box-shaped steering case α facing forward to form a vehicle body A, and a pair of main frames b.

A reduction gear d is installed between the engine C1 and the steering case α, a horizontal shaft f with a bevel gear e is installed in the steering case α, a pair of left and right steering clutches, and a brake y are installed, and the output of the reduction gear d is attached to the bevel gear e. A bevel gear (not shown) provided on the shaft is meshed and connected.

As described above, since each member constituting the steering device is mounted inside the steering case α by tightening bolts through a cage or the like, it is extremely troublesome to remove and install each member.

In particular, steering clutches and brakes are often removed and repaired when the friction plates are worn out, so if the removal and installation are very troublesome, the time required for repairs will be longer and the vehicle will be stopped. This is not preferable because it takes a long time.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a steering device mounting structure for a tracked vehicle that allows the steering device to be easily attached to (or removed from) the vehicle body. It is.

The present invention will be described in detail below with reference to FIG. 3 and subsequent figures.

FIG. 3 is an overall exploded perspective view. The vehicle body 1 is constructed by connecting a pair of left and right main frames 2.2 with a front connecting rod 3, an intermediate connecting frame 4, and a rear connecting frame 5. The rear sides 21 and 21 of the frame body 2.2 are vertically plate-shaped, and the lower connecting wall 6 and the rear connecting wall 7 are connected to form a storage space 8 that opens upward. 21.2' outer surface 21c
Mounting seats 9.9 for mounting the final reduction gear case 27 of the final reduction gear 26 are provided at L and 21α, respectively.

Reference numeral 10 denotes an engine, which is mounted between the front parts of a pair of left and right main frames 2゜2, and its output shaft 11 is connected to the input shaft of a torque converter 23 attached to a reduction gear 13 via a joint I2. A steering device I is installed on the output side of the reducer 13.
4 are detachably connected, the reducer 13 is installed between the intermediate portions of the pair of left and right main frames 2.degree. 2, and the steering device 14 is installed in the storage space 8.

A torque converter case 24 is connected to the reduction gear case 15 with bolts 25, and the steering case 1
6 are connected by bolts 17, and annular protrusions 18 are formed on the left and right sides of the steering case 16, respectively, and the lower side of the annular protrusions 18 connects with the four semicircular parts of the receiver 19 fixed to the inner surface 21A of the rear side 21. 19α, and the semicircular four parts 20a of the mounting body 20 are fitted on the upper side, and the receiving body 19 and the mounting body 2
0 with bolts 21, and the steering case 16 is installed in the storage space 8. 22 is an annular protrusion 18
It is a hole facing the.

Since it looks like this, loosen the bolt 21 and fix the mounting body 20f!
: By removing the joint 12, the υ steering case 16 can be removed together with the reducer case 15, making it easy to remove and install the steering system FC.

The details of each member will be explained below.

The rear end 7 langes 28 of the torque converter case 24 are connected to the front end wall 15α of the reducer case 15 with bolts 25,
The output shaft 29 extends into the reducer case 15 and serves as an input shaft of the reducer.

An annular projection 30 is formed on the rear wall 15A of the reduction gear case 15, and the steering case 16 is attached to the annular projection 30.
The boss hole 31 formed in the front wall 16Z fits into the rear wall 1
5b and front! 7 & 16α are connected by bolts 17, and an input shaft 33 is connected to the output shaft 32 of the reducer 13 by spline fitting.

A housing 34 is fitted and fixed to the rear wall 14h of the steering case 14, and an input gear 36 spline-fitted to the input shaft 33 is rotatably supported on the upper part of the housing 34 via a bearing 37. A support shaft 38 is rotatably supported at the lower part of the housing ±→ via a bearing 39, and a transmission gear 40 that meshes with the input gear 36 is spline-fitted to the support shaft 38, and a bevel gear. 41 is fixedly installed.

A pair of left and right partition walls 42, 42 are integrally formed on the lower wall 16C of the steering case I6, one partition wall 42 has a small diameter hole 43 formed therein, and a bearing body 44 is fixed with bolts 45. A large diameter hole 46 is formed in the partition wall 42, and a mounting plate 47 is fixed with bolts 48.
A bearing body 50 is fixed in the hole 49 of the mounting plate 47 with a bolt 51, and a cylinder M5 is inserted between the bearing body 50 and the bearing body 44.
2 is rotatably supported via a bearing 53, and a bevel gear 55 is bolted to a collar 54 of the cylindrical shaft 52, and the bevel gear 55 meshes with the bevel gear 41.

A horizontal shaft 56 is connected to the cylindrical shaft 52 by spline fitting, and a pair of left and right steering clutches and brakes 57 are provided at both ends of the horizontal shaft 560.
are the respective installations.

That is, the input flange 59 of the steering clutch 58 is spline-fitted to the end of the lateral gi 1156, the output flange 1 is provided to the input flange 59 via a friction plate 60, and the friction plate 60 is attached with a disc spring 62. The pressed suppression plate 63 is pressed against the output franchise 1, and the pressure plate 63 is pressed against the pressure receiving chamber 6.
111 is made to slide against the spring 62 with pressure oil supplied to the spring 62.

Attach the bolt 6 to the side surface +6d of the steering case 16.
A friction plate 68 is provided between the fixed flange 67 fixed to the side plate 66 fixed at 5 and the input franchisor 1,
The friction plate 68 is pressed against the fixed flange 67 by a suppression plate 70 pushed by a disc spring 69, and the pressure plate 70 is pressed against the pressure chamber 71.
A steering brake 72 is configured by sliding against a pressure oil disc spring 69 inside.

A cylindrical output shaft 73 is fixed to the output franchisor 1 through a collar 74 with bolts 75, and a transmission shaft 77 is spline-fitted and connected to an inner peripheral spline hole 76 of the output shaft 73. 7-7, a pinion 79 rotatably supported on the final reduction gear case 27 via a bearing 78 is spline-fitted, and the final reduction gear case 27 has an opening 8o concentric with the transmission shaft foot. The opening 8° is a lid body 81.
A presser rod 82 is fixed to the lid g1 with bolts 83, and the presser rod 82 is connected to the end surface 77α of the output shaft 77.
is in contact with.

Note that the final reduction gear 26 has a conventionally known structure, so a detailed explanation will be omitted.

As described above, in order to remove the steering case 16, remove the lid body 81, pull it out from the opening 80, screw the screw rod into the screw hole 84 of the transmission shaft 77, and insert the transmission shaft 77 inside the output shaft 73. It is pulled out from the circumferential spline hole 76 to make the two discontinuous.

Then, the mounting body 20 may be removed from the receiver 19 and lifted from the storage space 8 to be removed.

In addition, as shown in FIG. 6, the reducer case 15 and the steering case 16 are made separate, and a recessed portion 5' into which the cylindrical portion 161 of the steering case 16 is fitted is provided in the radial connection frame 5 of the vehicle body 1. It may be formed.

Since the present invention is configured as described above, the steering device can be easily attached to and detached from the vehicle body.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a conventional example, Fig. 2 is a sectional view of the mounting part of the steering device, Fig. 3 is an exploded perspective view showing an embodiment of the present invention, and Fig. 4 is a power transmission system. A cross-sectional view of
Figure i5 is a sectional view of the steering device, and Figure 6 is an exploded perspective view of another embodiment. 1 is a vehicle body, 8 is a storage space, 14 is a steering device,
16 is a steering case, 33 is an input shaft, 56 is a horizontal shaft, and 57 is a steering clutch and a brake. Applicant Komatsu Ltd. Representative Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto 3 Figure IQ

Claims (1)

[Claims] A storage space 8 is formed at the rear of the vehicle body 1 and opens upward.
Input shaft 33, horizontal shaft 56,
A steering system for a tracked vehicle characterized in that a pair of left and right steering clutches and brakes 57 and 57 are incorporated to constitute a steering device 14, and the steering case 16 is detachably mounted in the storage space 8. Device mounting structure.