JP3273992B2 - 4 crawler crawler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a four-crawler crawler.

[0002]

2. Description of the Related Art A pair of left and right front rollers and a pair of right and left rear rollers are provided.
Roller and power output from the same mission case
The four-crawler crawler that drives in common is known
(For example, see Japanese Utility Model Laid-Open No. 3-37080).
See ).

[0003]

A conventional four-crawler type endless track vehicle has a left and right front crawler on a mission case.
The rear crawler is supported, and the left and right front crawler
Left and right front parts protruding left and right from the front of the case
Power is transmitted by the output shaft, and the rear crawler is
A drive wheel is arranged at the front part, and the drive wheel
Left and right rear output shafts projecting from the rear to the left and right sides
Power transmission, including front and rear left and right output shafts
Crawler support load is applied to the transmission case.
Therefore, it must have the rigidity corresponding to it.
The case is large and complicated, and the front and rear left and right tracks and the right
Largely occupy the lower abdomen of the body between the front and rear crawler
This means that when the track goes down on soft ground,
Mud is pushed into the transmission case and the front and rear left and right output shafts.
Suddenly adhered and deposited and became enormous, preventing smooth running
There is a problem that such a situation easily occurs. There
Therefore, the present invention is to prevent the above-mentioned situation from occurring.
Those which are carried out for the purpose.

[0004]

[Means for Solving the Problems] And the above object is achieved.
Therefore, in the present invention, the lower rearward of the vehicle body (1)
Left and right rear crawlers (9) on the support (20) installed at the site
(9), and move to the rear drive wheels of both rear rollers (9) and (9).
Mission with left and right output shafts (24) for transmitting force
The case (23) is closed behind the support (20).
-La (9) (9) The support seat on the lower side of the vehicle body (1) corresponding to the front part
(25) Removably wear on (26), left and right output shafts (24)
From the side of the mission case ahead of (24)
It is mounted on the front of the vehicle body (1) by the extended drive shaft (30).
4 clocks for transmitting power to the left and right front rollers (8) and (8)
-It is a la endless tracked vehicle .

Further, a four-crawler type infinity having the above configuration
In the railcar, the front left and right crawlers (8) and (8) are centered on the vehicle body.
Swings right and left around the longitudinal axis (OO) centered on the line
Steering operation is provided at the left and right ends of the front axle (10).
Do not hinder the steering operation and left / right swing of the front crawler (8) (8).
The front end of the mission case (23)
(8) 4-crawler mounted as close as possible to the rear of (8)
Type crawler, and left and right front crawler (8) (8)
, A front axle body that can be moved back and forth with respect to the vehicle body (1)
(10) At the left and right ends, the steering operation is installed,
A door extending forward from the side of the transmission case (23).
The live shaft (30) is configured as a telescopic shaft and the drive shaft is
(30) is input-coupled to the front axle (10).
It is a limited rail car .

[0006]

The four-crawler crawler of the present invention is a vehicle.
The left and right support parts (20) installed on the lower rear part of the body
After supporting rear crawler (9) (9), after rear crawler (9) (9)
Left and right output shafts (24) (24) for transmitting power to the drive wheels
The mission case (23) obtained is located in front of the support (20).
(9) (9)
Removably mounted on the support seats (25) and (26), and the left and right output shafts
(24) From the side of the mission case ahead of (24)
A drive shaft (30) extending forward is mounted on the front of the vehicle body.
So as to transmit power to the left and right front crawler (8) (8)
, And the support load of the crawler is directly applied to the transmission case.
Mission case is small,
And the space occupied by the lower abdomen of the vehicle is small.
The vehicle can also be advantageously driven on soft ground .

The left and right front crawlers (8) and (8) are centered on the vehicle body.
Swings right and left around the longitudinal axis (OO) centered on the line
Steering operation is installed at the left and right ends of the front axle (10),
Prevents the right front crawler (8) (8) from steering and swaying
Close the front end of the mission case (23)
(8) By placing it as close as possible to the rear of
Drive to transmit power to the left and right front rollers (8) (8)
Before and after including the drive shaft (30) by shortening the shaft (30)
While keeping the entire drive system of the crawler compact,
The left and right front crawlers (8) and (8) can be circled
It can be performed smoothly .

Further, the left and right front crawlers (8) and (8) are
Left of the front axle (10) provided to be able to move back and forth with respect to (1)
At the right end, steering operation is installed, and the transmission case (2)
Extend the drive shaft (30) extending forward from the side of (3).
The drive shaft (30) is configured as a retractable shaft and the front axle (1)
0), the front vehicle for the vehicle body (1)
The body (1) can be changed to wide and narrow only by moving the shaft (10) back and forth.
Before and after the front crawler (8) (8) and the back crawler (9) (9)
The interval can be changed and adjusted, and the body area increases as the crawler moves.
Various working parts on the vehicle body (1)
It is convenient for mounting and configuring as a work vehicle
Was .

[0009]

1 is an overall side view of a tracked vehicle according to the present invention, FIG. 2 is a partial side view showing an enlarged part of the tracked vehicle, and FIG. 3 is a schematic plan view of the tracked vehicle according to the present invention. 4 is a side view showing the rear crawler and its supporting structure of the tracked vehicle according to the present invention, FIG. 5 is a partial plan view showing the rear crawler supporting structure, and FIG. FIG. 7 is a schematic view of the support structure of the rear crawler viewed from the back, and FIG.
FIG. 9 is a partial side view showing another embodiment.

In FIG. 1, reference numeral 1 denotes a vehicle body formed in a substantially rectangular shape in plan view. An engine room 2 is provided at a front corner of a flat upper surface, and a seat 3 and an engine room are provided above the engine room. A driving device including a steering column 4 and the like disposed in front of the vehicle is provided. Reference numeral 5 denotes an engine mounted in the engine room with its output shaft directed in the vehicle width direction, and reference numerals 6 and 7 denote a hydraulic pump and an oil tank attached to the engine.

A pair of left and right front rollers 8 and 8 and a pair of right and left rear rollers 9 and 9 are disposed at four front, rear, left and right positions below the vehicle body 1 to form a four-roller type infinity. A front axle case 10 is provided below the front end of the engine room 2 in a side view.
It is supported by

Specifically, an axis O which coincides with the center line of the vehicle body O
A cylindrical case extending from a differential case 12 attached to the vehicle body 1 so as to be able to swing left and right around a center pin 11 of -O;
At the left and right ends of a front axle case 10 formed by extending a base case, a final case 13 is provided rotatably around the axis of the kingpin shaft. And the front rollers 8, 8 are formed by wrapping the endless crawler belt 14 around the rolling wheel group, the guide wheels, and the drive wheels mounted on each truck frame. 8,
Numeral 8 is forcibly driven by a front drive system F configured to transmit to the drive wheels through the inside of the front axle case 10. Note that the kingpin axis has a kingpin inclination angle inclined by a predetermined angle a with respect to the vertical line Y (see FIG. 6), and has a caster angle inclined rearward by a predetermined angle b with respect to the vertical line Y. (See FIG. 2).

The left and right final cases 13, 1
3 are connected by a tie rod 15, and one of the final cases 13 is linked to a steering wheel 16 provided on the operation column 4 via a drag rod 17, and the front wheel 8, 8
The steering device is constituted by a power steering device, which is not shown, but is operated by the hydraulic oil from the hydraulic pump 6 described above.

On the other hand, each of the rear rollers 9, 9 is disposed between a drive wheel provided at the rear end of the track frame, a guide wheel disposed at the front end, and both wheels. The endless crawler belt 18 is wrapped around the wheel group and has a ground contact length longer than that of the front crawler 8. A bracket case (supporting portion 20) provided on the vehicle body 1 is mounted on a lower end portion so that the front and rear portions can swing up and down in a seesaw manner within a predetermined range.

A support shaft 1 for supporting the rear crawler 9 in a swingable manner.
Numeral 9 also serves as one axis of the rear drive system B for transmitting power to the drive wheels. The link between the support shaft 19 and the drive wheel shaft is interlocked by a chain transmission mechanism 21 and the support shaft 1
9 is a chain transmission mechanism 2 in the bracket case 20.
The power is transmitted through the power transmission line 2. Thus, the input side of the chain transmission mechanism 22 is connected to an output shaft 24 protruding left and right from a transmission case 23 fixed to the lower surface of the vehicle body 1.

The mission case 23 includes a front crawler 8,
The front end portion is as close as possible to the rear tail portion of the front crawler 8 as far as it does not interfere with the movement of the steering and the like of the front crawler 8, and, as a whole, the front portion of the rear crawler 9, 9. , And are detachably hung on support seats 25 and 26 provided on the lower side of the vehicle body 1. The transmission case 23 is formed long in the front-rear direction and narrow in the vertical and horizontal directions. An input shaft 27 parallel to the output shaft of the engine 5 is provided at a front end of the transmission case 23 and is parallel to the input shaft 27. The output shaft 24,
24 is provided at the rear end portion, and accommodates a speed change transmission mechanism for interlocking connection between these two shafts 27 and 24, 24.

The speed change transmission mechanism formed in the transmission case 23 includes a hydraulic continuously variable transmission 28, and the power whose speed is set by the hydraulic continuously variable transmission 28 is output to the output shaft 2.
A branch transmission part 29 is provided in the middle of the path for transmitting to the transmissions 4 and 24, and a drive shaft 30 extending forward from this branch transmission part.
Is input to the differential case 12 of the front axle 10 to drive the front drive system F and the rear drive system B synchronously. A pair of left and right side clutch mechanisms and a steering brake (not shown) are incorporated in the transmission path behind the branch transmission section 29. 8 is configured to be activated at a required time in connection with the steering operation of the vehicle.

FIG. 8 shows another embodiment. This embodiment is almost the same as the above-described embodiment (FIGS. 1 to 7) and only partially differs. Therefore, the same portions as those in the above-described embodiment are denoted by the same reference numerals, and only the differences will be described. I do. A support 31 for supporting the front axle body 10 is attached to an attachment portion 32 provided on the lower side of the vehicle body 1 so as to be movable back and forth, and the drive shaft 30 is configured as a telescopic shaft. When the hydraulic cylinder 32 interposed between the vehicle 1 and the vehicle body 1 expands and contracts, the front axle body 10 moves back and forth, and the front-rear spacing between the front rollers 8, 8 and the rear rollers 9, 9 changes. Have been. Therefore, according to this embodiment, while the width of the upper surface of the vehicle body is kept unchanged,
Only the front and rear intervals between the rollers and the rear rollers can be changed as necessary.

[0019]

[Function] In the tracked vehicle configured as described above,
The power of the engine 5 is set forward and backward by the hydraulic continuously variable transmission 28 and the speed is set, and is transmitted to the left and right output shafts 24, 24, and at the same time, is also input from the branch transmission unit 29 to the front drive system F by the drive shaft 30 . Thus, a pair of left and right front rollers 8, 8 and rear rollers 9, 9 are driven synchronously to move forward and backward as desired. When the vehicle encounters unevenness on the ground during traveling, the center pin 11
The front and rear crawlers 8 and 8 are oscillated around the center of the front cradle. The vehicle travels in a stable state with little inclination of the vehicle body.

Further, in the running state, the steering wheel 16 of the steering device is turned to the left or right, before according to the rotation angle black - left La 8,8 is turned to the left or right, or The vehicle is turned to the right. At this time, if the front crawlers 8 and 8 are largely turned over the set angle,
The side clutch on the inner side of the turning in the transmission path to the rear crawler is "disengaged", and the brake on the same side is braked to perform a sharp turn of the vehicle body.

[Brief description of the drawings]

FIG. 1 is an overall side view of a tracked vehicle according to the present invention.

FIG. 2 is a partially enlarged side view showing a part of a tracked vehicle.

FIG. 3 is a schematic plan view of a tracked vehicle according to the present invention.

FIG. 4 is a side view showing a rear crawler of the tracked vehicle according to the present invention and a supporting structure thereof.

FIG. 5 is a partial plan sectional view showing a rear crawler support structure.

FIG. 6 is an explanatory diagram showing a left-right swing mode of a front crawler.

FIG. 7 is a schematic view of a support structure of a rear crawler as viewed from the back.

FIG. 8 is a partial side view showing another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Body 8 Front crawler 9 Rear crawler 10 Front axle body 20 Support part (bracket case) 23 Transmission case 24 Output shaft 25 Support seat 26 Support seat 30 Drive shaft

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshikazu Hiroshige 428 Enami, Okayama City, Okayama Pref. Kaihei 3-37080 (JP, U) Shokai 60-165221 (JP, U) Shokai 57-70984 (JP, U) Shokai 59-2974 (JP, U) Shokai 57-1443987 (JP, U) (JP, U) Actually open sho 59-220466 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 55/065 B62D 55/084 B62D 55/12 B62D 55/135

Claims (3)

(57) [Claims] 1. A vehicle (1) installed at a lower rearward portion.
The left and right rear rollers (9) and (9) are supported on the support portion (20).
Right and left to transmit power to rear drive wheels of both rear rollers (9), (9)
Transmission case (23) with output shafts (24) and (24)
To the front of the rollers (9) and (9) after the support (20).
Corresponding to the vehicle body (1) on the lower support seats (25) (26)
Wearable detachably, before the left and right output shafts (24) (24)
Dry case that extends forward from the side of the mission case
Left and right front mounted on the front part of the vehicle body (1) by the axle (30)
A crawler-type endless track vehicle characterized in that power is transmitted to the crawler (8) . 2. The vehicle body (1) is installed at a lower rearward portion.
The left and right rear rollers (9) and (9) are supported on the support portion (20).
Right and left to transmit power to rear drive wheels of both rear rollers (9), (9)
Transmission case (23) with output shafts (24) and (24)
To the front of the rollers (9) and (9) after the support (20).
Corresponding to the vehicle body (1) on the lower support seats (25) (26)
Wearable detachably, before the left and right output shafts (24) (24)
Dry case that extends forward from the side of the mission case
Left and right front mounted on the front part of the vehicle body (1) by the axle (30)
Crawler (8), Four crawler that transmits power to (8)
Type front end crawler (8) (8)
Sway right and left around the center of the longitudinal axis (OO) that matches the body center line
Steering operation is installed at the left and right ends of the moving front axle (10).
In front of it, hinder the steering operation and left / right swing of the crawler (8) (8).
Close the front end of the mission case (23)
-A four-crawler crawler vehicle characterized by being provided as close as possible to the rear of the la (8) . 3. The vehicle body (1) is installed in a lower rearward portion.
The left and right rear rollers (9) and (9) are supported on the support portion (20).
Right and left to transmit power to rear drive wheels of both rear rollers (9), (9)
Transmission case (23) with output shafts (24) and (24)
To the front of the rollers (9) and (9) after the support (20).
Corresponding to the vehicle body (1) on the lower support seats (25) (26)
Wearable detachably, before the left and right output shafts (24) (24)
Dry case that extends forward from the side of the mission case
Left and right front mounted on the front part of the vehicle body (1) by the axle (30)
Crawler (8), Four crawler that transmits power to (8)
Type crawler, the left and right front crawler (8) (8)
, A front axle body that can be moved back and forth with respect to the vehicle body (1)
(10) At the left and right ends, the steering operation is installed,
Extending forward from the side of the transmission case (23).
The drive shaft (30) as a telescopic shaft
It is noted that the axle (30) is input-coupled to the front axle (10).
A four-crawler crawler vehicle.