JPH09263219A - Brake structure for full crawler type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make compact and to prevent a breaking of brake devices of rear axles and rear sprockets, and to carry out a steering operation, a braking operation in the running condition, and a parking braking operation by using four brake devices of two at the left side and two at the right side. SOLUTION: A transmission means 14 to transmit the motive power from a rear axle to a rear sprocket is built in a transmission case, the rear sprocket and the brake device 16 of the rear axle are provided at the inner side than the transmission case, and the transmission case, the rear sprocket, and the brake device 16 are housed within the width of a crawler 10. The brake devices 16 are provided two at the left side and two at the right side, and a steering device 25 operating to the left side or the right side by the fluctuation of a pitman arm 24, and a parking brake device 28 and a running brake device 65 operating to the left arid to the right simultaneously, are interlocked and connected to the left side and the right side brake devices 16A and 16B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake structure for a full-crawler type vehicle which can travel on public roads and off-road (fields, fields, snow roads, etc.) and whose traveling portion is a crawler over its entire length.

[0002]

2. Description of the Related Art Generally, a full crawler type vehicle is constructed by replacing the front and rear wheels of a wheel type vehicle with crawler belts, for example, the one disclosed in Japanese Utility Model Laid-Open No. 6-47082. In the above-mentioned related art, the upper part of the vehicle is provided on the upper part of the crawler traveling part, and the upper part of the vehicle has a pair of left and right suspensions at the front and rear, and the left and right rear suspensions support the rear axle case for the left and right rear axles. The lower crawler traveling unit connects a pair of left and right track frames with a front and rear connecting body to form a square frame body, supports the front and rear sprockets and the track rollers on each track frame, and wraps the crawlers around them, The upper and lower suspensions are connected to the front and rear of the left and right track frames, and power can be transmitted from the rear axle to the rear sprockets.

In order to operate the brakes on the left and right rear axles to perform steering, a midway portion of a wire connecting the equalizer member of the parking brake and the left and right brakes is connected to a pitman arm which is swung by a steering wheel operation. There is. Also,
With the foot pedal, the braking device provided on the front axle is operated simultaneously on the left and right.

[0004]

In the above-mentioned prior art, the left and right track frames cannot be connected to each other by the front and rear connecting bodies to form a rectangular frame unless the left and right track frames are connected to the knuckle. Since it is difficult to assemble the crawler traveling unit independently of the upper portion of the vehicle, the assembly workability is low.

Further, the conventional braking device is provided only for each of the left and right rear axles, and its braking ability and durability are low, and the braking device for steering and parking is a crawler. It has a structure that projects more outwardly and is easily broken or damaged. Further, since the traveling brake device is provided on the front axle, the vehicle may stop forwardly, and the provision of this on the rear axle side causes the braking device for steering and parking to protrude outward from the crawler. Has become difficult because.

According to the present invention, the upper part of the vehicle and the crawler running part are separately assembled, the upper part of the vehicle is placed and connected to the crawler running part from above, and the transmission means for interlocking and connecting the rear axle and the rear sprocket is transmitted. By putting the case, rear axle braking device and rear sprocket within the width of the crawler, the entire vehicle can be easily assembled, the crawler running part can be made compact, and the structural members can be prevented from being damaged. Two brake devices are provided on each rear axle, and
An object of the present invention is to provide a brake structure for a full-crawler type vehicle in which two braking devices can perform a steering effect, a running braking effect, and a parking braking effect.

It is an object of the present invention to provide a brake structure for a full crawler type vehicle in which two brake devices, one each on the left and right, share a brake disk to achieve a compact size and cost reduction. The present invention uses a brake device capable of both wire hydraulic operation for each of two left and right brake devices, performs steering operation and parking brake operation by wire interlocking, and performs traveling brake operation by hydraulic pressure to provide an appropriate and effective brake operation. It is an object of the present invention to provide a brake structure for a full-crawler type vehicle that enables the above.

[0008]

A first specific means for solving the problems in the present invention is provided with a vehicle upper portion U on an upper portion of a crawler traveling portion D, and the vehicle upper portion U is arranged in front and rear left and right pairs. The left and right rear suspensions 3 support the rear axle case 5 for the left and right rear axles 4, and the crawler traveling section D connects the pair of left and right track frames 6 to the front and rear connecting bodies 7, 8. To form a square frame body 9, and the front and rear sprockets 11 and 1 are attached to each track frame 6.
2 and the track roller 13 are supported and the crawler 10 is wound around them, and the front suspension 2 and the rear axle case 5 of the vehicle upper part U are connected to the front and rear connecting portions 9 of the rectangular frame 9.
A full crawler type vehicle that is connected to F and 9R and is capable of transmitting power from the rear axle 4 to the rear sprocket 12, and has transmission means 14 for transmitting power from the rear axle 4 to the rear sprocket 12 built in a transmission case 15. , The rear sprocket 12 and the brake device 16 of the rear axle 4 are arranged inward of the transmission case 15, and the transmission case 15, the rear sprocket 12 and the brake device 16 are accommodated within the width of the crawler 10, Each of the two braking devices 16 is provided, and the left and right braking devices 16A and 16B are provided with a steering device 25 that is actuated left and right by swinging the pitman arm 24, and a parking brake device 28 and a travel braking device 65 that are simultaneously actuated left and right. It is linked and linked.

As a result, the transmission case 15, the rear sprocket 12 and the braking device 16 are housed within the width of the crawler 10 for protection, and a steering action and a running braking action are provided by the two left and right four braking devices 16. , The parking brake action and three actions are performed. The second concrete means for solving the problem in the present invention is, in addition to the first concrete means, two brake devices 16 on each of the left and right sides.
A and 16B share the brake disc 17 provided on the rear axle 4 and are arranged with a phase shift in the circumferential direction.

As a result, the structure of the left and right two braking devices 16A and 16B becomes simple and inexpensive, and the arrangement in the left and right direction becomes compact. In addition to the first specific means, a third specific means for solving the problem in the present invention is such that the vehicle upper portion U pulls a steering device 25 for swinging the pitman arm 24 and an equalizer member 27. A parking brake device 28 that simultaneously operates the left and right brake devices 16, a steering interlocking device 29 that independently operates the left and right brake devices 16 by horizontally swinging the pitman arm 24 between the pitman arm 24 and the left and right brake devices 16, and a foot pedal. It has a traveling brake device 65 that simultaneously operates the left and right brake devices 16 by depressing 66.
Connects the pitman arm 24 and both ends of the equalizer member 27 with two interlocking wires 30 so as to pull the end portion of the equalizer member 27 with each left and right swing of the pitman arm 24. Two brake devices 16A and 16B capable of operating both wire hydraulics are provided to the left and right two brake devices 16A and 16B, respectively, and the traveling brake device 65 is connected to both ends of the equalizer member 27 via two wires 26, respectively. That is, they are connected via four hydraulic pipes 71.

As a result, the brake devices 16A and 16B capable of operating both the left and right four wire hydraulics in total are appropriately operated for steering and parking brakes via the wires 26, and the traveling brakes are operated via hydraulic pressure. Do effectively and powerfully.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 16, a full crawler type vehicle 1 is roughly divided into a vehicle upper portion U and a crawler traveling portion D, which are assembled independently of each other, and then the vehicle upper portion U is disposed above the crawler traveling portion D. It is mounted and mounted on.

The upper part U of the vehicle utilizes a light-duty truck of a wheel type vehicle, with the front and rear wheels and front knuckles of the light-duty truck removed, and the body, engine, drive system, chassis, suspension, etc., remain unchanged. The strut assembly 36 and the stabilizer 37 of a strut type suspension device (McPherson type suspension) are present as the front suspension 2 in the front part, and the rigid leaf spring type suspension device (as the rear suspension 3 is provided in the rear part. There is a vertical leaf spring 38 only, and the left and right rear axle cases 5 protruding from the rear wheel differential device 39 are supported by the vertical leaf spring 38, and a brake is provided between each left and right rear axle 4 and the rear axle case 5. A device 16 is arranged.

A steering wheel 25, a steering wheel 40, a gear box 41, a pitman arm 24 and the like are present on the upper portion U of the vehicle, and a parking brake device 28 is a parking brake lever 43, an equalizer member 27, the equalizer member 27 and the pitman. There are wires for connecting the arm 24, the parking brake lever 43, and the left and right brake devices 16, and the like, and the traveling petrol device 65 includes a foot petal 66, a master cylinder 67, a valve 68, and hydraulic pipes for connecting them to the left and right brake devices 16. And so on.

In the crawler traveling section D, a pair of left and right track frames 6 are connected by front and rear connecting bodies 7 and 8 to form a square frame body 9.
Formed on each track frame 6 front and rear sprockets 1
1, 2 and the track roller 13 are supported, and the crawler 10 is wound around them. 4 to 8, the left and right track frames 6 are connected to the front and rear portions of a frame member 44 having a substantially inverted U-shaped cross section by connecting the front and rear connecting members 7 and 8 made of pipe material.
To form a rectangular frame in a plan view, and a supporting plate 45 extending rearward and upward is fixed to the inner rear ends of the left and right track frames 6 and the rear connecting body 8 to form a rectangular frame body 9. Track roller 1 through bracket 46 on material 44
3 is supported, and the front sprocket 11 is supported via the tension adjusting means 47 so that the front and rear positions can be adjusted.

The track roller 13 includes a swing bracket 4
6A, two supporting wheels 13A each supported by 6A, and a fixing bracket 4 on the lower front and rear of the frame member 44 and the upper center.
6B and a guide wheel 13B supported via 6B. A shaft 22 protruding outward is fixed to the rear end of the support plate 45, and the rear sprocket 12 is rotatably supported by the shaft 22.

The crawlers 10 wound around the rear sprocket 12, the front sprocket 11 and the plurality of track rollers 13 may be iron crawlers, but rubber crawlers are preferable when used in the field. In order to connect the strut assembly 36 and the stabilizer 37 of the front suspension 2 to the left and right front portions of the square frame body 9, that is, the left and right sides of the front connecting body 7, as shown in FIGS. The brackets 48A and 48B are projected upward and forward to form a front connecting portion 9F.

As shown in FIGS. 2, 5, 6, 10 to 12, notches 49A for receiving the rear axle case 5 are formed in the left and right rear portions of the rectangular frame 9, that is, in the middle of the support plate 45. A receiving bracket 49B for fixing the U-bolt 50 is fixed to form a rear connecting portion 9R. Therefore, the crawler traveling unit D assembled and configured as described above mounts the assembled vehicle upper portion U from above and bolts the strut assembly 36 and the stabilizer 37 to the brackets 48A and 48B of the front connecting portion 9F, respectively. , The rear axle case 5 is engaged with the notch 49A,
Moreover, by simply fitting the U bolt 50 so as to sandwich the rear axle case 5 and fixing it to the receiving bracket 49B, the vehicle upper portion U
And the crawler traveling section D are assembled.

The full crawler type vehicle 1 can be disassembled by simply removing the bolts of the front and rear connecting portions 9F and 9R and lifting the upper portion U of the vehicle upward. Further, at the time of disassembling and assembling, the crawler 10 of the crawler traveling portion D may be either removed or wound. As shown in FIGS. 10 and 11, a transmission means 14 for transmitting power from the rear axle 4 to the rear sprocket 12 is arranged at the rear portion of the crawler traveling portion D. The brake device 16 at the outer end of the rear axle case 5 is located on the outer surface side of the support plate 45, and is arranged within the width of the track frame 6 together with the transmission means 14.

The transmission means 14 has a drive transmission body 19 provided on the drive shaft 18, and a drive transmission body 21 provided on the drive shaft 20 and to which power is transmitted from the drive transmission body 19. The drive transmission body 19 and the transmission transmission body 21 are sprockets having different diameters, and a chain 52 is wound around the sprockets to form chain transmission means. The drive shaft 18 has a shaft mounting body 18A, which is detachably fixed from the outside by bolts or the like via a disc mounting body 23 fixed to the outer end of the rear axle 4 with a brake disc 17 interposed therebetween. The shaft 20 has a shaft mounting body 20A, and the rear sprocket 12
It is detachably fixed from the outside via bolts.

The drive transmission body 19 and the transmission transmission body 21 are surrounded by a transmission case 15 divided into two parts, and conversely, the transmission case 15 is opposed to the drive shaft 18 and the transmission shaft 20 via bearings. It is rotatably supported. The transmission means 1
4 can be assembled separately from the main body portion of the crawler traveling section D so as to be built in the transmission case 15, and in the assembled state, the shaft mounting body 18A is mounted on the disk mounting body 23 and the shaft mounting body 20A is mounted. On the rear sprocket 12,
Each is fixed via bolts from the outside in the axial direction.

In FIGS. 10 and 11, the drive transmission 19 is set to have a large diameter and the transmission transmission 21 is set to have a small diameter so that the speed increasing power is transmitted from the rear axle 4 to the rear sprocket 12. The shaft mounting body 18A and the shaft mounting body 20A
If the bolt hole positions of the shaft mounting body 1 are the same, as shown in FIG.
8A can be fixed to the rear sprocket 12, and the shaft mounting body 20A can be fixed to the disk mounting body 23, respectively.
It can be set to transmit deceleration power from the rear axle 4 to the rear sprocket 12.

The full crawler type vehicle 1 is a small special vehicle when the maximum road speed on the road is less than 15 km / h, and is a large special vehicle when the maximum speed on the road is less than 45 km / h. Therefore, the maximum speed on the road is set to 15 km / h in two modes of deceleration and acceleration obtained by reversing the transmission means 14 by limiting the engine speed to around the maximum torque.
By making it possible to change the setting between / h and 45 km / h, one type of full crawler type vehicle 1 can be shared by two types.

Further, the transmission means 14 includes a shaft mounting body 18
Two kinds of bolt holes at different positions may be formed in A and the shaft mounting body 20A, a gear transmission means may be used instead of the chain transmission means, and in the case of exclusive use for one vehicle type, constant speed You may give a transmission. The transmission case 15 having the transmission means 14 built therein is formed to have a small width in the left-right direction. As shown in FIG. When the crawler traveling section D travels, it does not come into contact with external obstacles.

Two brake devices 16 are provided between each of the left and right rear axles 4 and the rear axle case 5, and the brake devices 16A and 16B are, for example, built-in disc brake devices. The two brake devices 16A and 16B are used for steering operation, parking brake operation and traveling brake operation. The left and right brake devices 16A and 16B share the brake disc 17 mounted on the disc mounting body 23, and are arranged with their phases shifted in the circumferential direction of the brake disc 17.

In FIGS. 1 and 11 to 16, a pitman arm 24 of a steering device 25 is pivotally supported by a front lower component 53 of a vehicle upper portion U via a support shaft 55, and a tie rod connected to a front knuckle is It has been removed and instead the connector 56 is fixed. The connecting body 56 is provided with a pair of left and right elongated holes 57 and a pin 58. The left and right elongated holes 57 are engaged with the tip ends of the piston rods of a pair of left and right air dampers constituting the return means 31, and when the pitman arm 24 is swung by the steering of the handle 40, the air dampers in the same direction are compressed. However, the restoring force causes the pitman arm 24 to return from the swing position to the center side. The base of the air damper is pivotally supported by the front lower mounting member 54.

The left and right pins 58 of the connecting body 56 are respectively
The connecting tool 60 at one end of the inner wire 30A is fitted and connected through the long hole 60A. The interlocking wire 30 is a Bowden wire or a push-pull wire, and both ends of the outer wire 30B are fixed to the front lower mounting member 54 and the vehicle upper portion U by the supporting plate 6.
The other end of the inner wire 30 </ b> A is connected to the left and right ends of the equalizer member 27.

The center of the equalizer member 27 is pivotally supported by the ends of the parking brake wire 42, and the inner wire 30A and the wire mounting member 72 are pivotally connected at both left and right ends. One end of the wire 26 is connected to the upper and lower ends of each of the left and right wire attachments 72, the other ends of the two left wires 26 are connected to the left brake devices 16A and 16B, and the other ends of the two right wires 26 are connected to each other. It is connected to the right brake devices 16A and 16B.

When the pitman arm 24 is swung by steering the steering wheel, one inner wire 30A is pulled, and as shown in FIG. The brake devices 16A and 16B are operated to apply a braking force to the traveling of the left and right crawlers 10, thereby steering the full crawler type vehicle 1.

When the parking brake lever 43 is operated to pull the wire 42 in the steering state of FIG. 15, the center of the equalizer member 27 is pulled, and the steering side wire 2 is pulled.
Since 6 is in a pulled state, that state is maintained, the equalizer member 27 swings, and the two wires 26 on the non-steering side
Also pulls, which makes a total of 4 brake devices on the left and right 16
Are all in the braking state.

Equalizer member 27 by the wire 42
Since the pulling direction of the wire is the same as the interlocking wire 30 and does not quarrel, the wire 26 can be pulled by both wires 30, 42. Further, in the traveling brake device 65, a master cylinder 67 is connected to a foot pedal 66 pivotally supported on the upper portion U of the vehicle.
And the valve 68 are connected via a hydraulic pipe 69, and the valve 68 and the left and right two braking devices 16A and 16B are connected to the hydraulic pipe 7 respectively.
1 are connected. The valve 68 (or the master cylinder 67) is connected to the hydraulic pump 73.

Therefore, by depressing the foot pedal 66, a total of four brake devices 16 on the left and right are provided via the valve 68.
Are operated simultaneously at the same pressure. The valve 68 may be a metering valve or the like other than the distribution valve. Left and right brake devices 16
A, 16B, tearing device 25, parking brake device 2
8 and the traveling brake device 65 are attached to the vehicle upper portion U regardless of the crawler traveling portion D.

The present invention is not limited to the above embodiment, but can be variously modified. For example,
The traveling brake device 65 has four hydraulic pipes 71 connected to the master cylinder 67, two hydraulic pipes 71 connected to each of the two master cylinders 67, and pressure oil supplied from a hydraulic pump 73. Can be used as an open type or a closed type, or other conventional brake operating system technology can be used.

Also, two brake devices 16 are provided on each of the left and right sides.
A, 16B can be constructed by installing a brake system for the front wheels of a light four-track together with a brake system for the rear wheels, and a built-in disc brake is shown, but other brakes that operate by both wire and hydraulic pressure are shown. A device may be used, and two pistons of a two-cylinder type caliper brake are operated by two wires, one of the two wires is a wire 26, and the other is connected to a foot pedal 66 via an equalizer. May be.

Each of the brake devices 16A and 16B may have its own brake disc 17, and a solid type or ventilated type disc brake is preferable, but a drum brake may be used. Further, the brake devices 16A and 16B may be housed in one caliper.

[0036]

According to the present invention described in detail above, the rear axle 4
Transmission means 14 for transmitting power from the rear sprocket 12 to the rear sprocket 12
Is incorporated in the transmission case 15, and the brake device 16 for the rear sprocket 12 and the rear axle 4 is located inward of the transmission case 15.
And the transmission case 15 and the rear sprocket 12 are arranged.
Also, the brake device 16 is housed within the width of the crawler 10, two left and right brake devices 16 are provided, and the pitman arm 24 is provided on the left and right brake devices 16A and 16B.
Steering device 25 which is operated left and right respectively by swinging, and parking brake device 28 which is operated simultaneously left and right
And the traveling brake device 65 are linked together,
The transmission case 15, the rear sprocket 12, and the braking device 16 can be housed within the width of the crawler 10 for protection, and the rear axle 4 has two left and right two braking devices 1 in total.
6, the steering action, the running braking action, and the parking braking action can be performed, and the braking ability and the durability can be enhanced, and the entire braking device 16 and its related devices are assembled on the upper part U of the vehicle. Since it can be attached, the workability of assembling the vehicle can be improved.

Further, two brake devices 16A on each of the left and right sides,
16B share the brake disc 17 provided on the rear axle 4 and are arranged with their phases shifted in the circumferential direction. Therefore, the structure of each of the two left and right brake devices 16A, 16B can be simple and inexpensive, and the arrangement in the left-right direction can be performed. Can be made compact. The steering interlocking device 29 pulls the end portion of the equalizer member 27 by the left and right swings of the pitman arm 24.
Two interlocking wires 30 connect the pitman arm 24 and both ends of the equalizer member 27, and two brake devices 1 capable of operating both wire hydraulics are provided to the left and right brake devices 16.
6A and 16B are provided, and two left and right brake devices 16 are provided.
Since both ends of the equalizer member 27 are connected to A and 16B via two wires 26, respectively, and the traveling brake device 65 is connected via four hydraulic pipes 71,
A total of four wire hydraulic brakes 16A and 16B, two on each of the left and right sides, perform steering operation and parking brake operation appropriately via the wire 26, and the traveling brake operation is effective and powerful via hydraulic pressure. Can be done.

[Brief description of drawings]

FIG. 1 is an explanatory perspective view of a full crawler type vehicle showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a full crawler type vehicle.

FIG. 3 is an overall side view of a full crawler type vehicle.

FIG. 4 is a side view of a crawler traveling unit.

FIG. 5 is a side view of a rectangular frame body.

FIG. 6 is a plan view of a rectangular frame body.

FIG. 7 is a front view of a rectangular frame body.

FIG. 8 is a rear view of the rectangular frame body.

FIG. 9 is a sectional front view of a front portion of the crawler traveling unit.

FIG. 10 is a side view of a rear portion of the crawler traveling unit.

FIG. 11 is a cross-sectional rear view of the rear portion of the crawler traveling unit.

FIG. 12 is a side view of a rear portion of the crawler traveling unit in which the transmission unit is decelerated.

FIG. 13 is a plan view of a steering device.

FIG. 14 is a plan view of a steering device, a parking brake device, and a traveling brake device.

FIG. 15 is an explanatory plan view showing the steering state of FIG.

FIG. 16 is an explanatory diagram of a left and right brake device.

[Explanation of symbols]

 1 Full crawler type vehicle 4 Rear axle 5 Rear axle case 16 Brake device 17 Brake disc 24 Pitman arm 25 Steering device 28 Parking brake device 65 Traveling brake device 66 Foot pedal U Vehicle upper part D Crawler running part

[Procedure amendment]

[Submission date] May 17, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction contents]

The front and rear suspensions of a wheel type vehicle are
The upper structure is used as is, but the front suspension
The knuckle still has a knuckle
After connecting the track frames,
Connect the rams with the front and rear connectors to form a square frame.
The components of the crawler running part are
The structure is such that the materials are assembled together.
And the power transmission from the rear axle to the rear sprocket is the rear axle.
When installing a rear sprocket on top and connecting directly,
Transmitted to the brake shaft via a transmission,
Install the rear sprocket via the chain transmission
In some cases, it may be transmitted to the drive shaft. Further, in order to operate the steering by operating the brake device of the left and right rear axles, the middle part of the wire connecting the equalizer member of the parking brake device and the left and right brake devices is connected to the pitman arm that swings by the steering wheel operation. . Furthermore , the brake device provided on the front axle is operated simultaneously by the foot pedal.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

In the above-mentioned prior art, the left and right track frames cannot be connected to each other by the front and rear connecting bodies to form a rectangular frame unless the left and right track frames are connected to the knuckle. because be kept assembled independently crawler drive unit with respect to the upper carriage is difficult, assembling workability also becomes to low.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

Further, the conventional braking device is provided only for each of the left and right rear axles, and its braking ability and durability are low, and the braking device for steering and parking is a crawler. It has a structure that projects more outwardly and is easily broken or damaged. Further, since the traveling braking device is provided on the front axle, the vehicle may stop forwardly, while providing it on the rear axle side causes the braking device for steering and parking to protrude outward from the crawler. It is difficult to do so.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

The present invention, in advance separately assembled and upper carriage and the crawler drive unit, as well as placing connecting from above the upper carriage in the crawler drive unit, the transmission means for interlocking connecting the rear axle and the rear sprocket transmission case, pay braking device and the rear sprocket of the rear axle within the width of the crawler Turkey
By this , the whole vehicle can be easily assembled, the crawler traveling section can be made compact, and the constituent members can be prevented from being damaged. Furthermore, two brake devices are provided on each of the left and right rear axles. An object of the present invention is to provide a brake structure for a full-crawler type vehicle in which a braking operation, a traveling braking operation, and a parking braking operation can be performed by a braking device.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

An object of the present invention is to provide a brake structure for a full-crawler type vehicle in which one brake disk is shared by two brake devices on each of the left and right rear axles, so that the size and cost can be reduced. And The present invention uses a brake device capable of both wire hydraulic operation for each of two left and right brake devices, performs steering operation and parking brake operation by wire interlocking, and performs traveling brake operation by hydraulic pressure to provide an appropriate and effective brake operation. It is an object of the present invention to provide a brake structure for a full-crawler type vehicle that enables the above.

 ─────────────────────────────────────────────────── ─── Continued front page (72) Hiromitsu Sueyoshi, 1-1 Daihatsu Town, Ikeda City, Osaka Prefecture Daihatsu Industry Co., Ltd. (72) Takashi Terada, 64 Ishizukitacho, Sakai City, Osaka Prefecture Kubota Sakai Co., Ltd. Inside the factory

Claims (3)

[Claims] 1. A crawler traveling portion (D) is provided on an upper portion (U) of the vehicle.
The upper part of the vehicle (U) has a pair of left and right suspensions (2, 3) on the front and rear, and a rear axle case (5) for the left and right rear axles (4) by the left and right rear suspensions (3). ), And the crawler traveling section (D) connects the pair of left and right track frames (6) to the front and rear connecting bodies (7,
8) is connected to form a rectangular frame body (9), front and rear sprockets (11, 12) and a track roller (13) are supported on each track frame (6), and a crawler (10) is wound around them. The front suspension (2) and the rear axle case (5) of the vehicle upper part (U) are connected to the front and rear connecting portions (9F, 9R) of the rectangular frame (9), and the rear axle (4) and the rear sprocket (12) are connected. A full-crawler type vehicle capable of transmitting power to a rear transmission shaft (4) and a transmission means (14) for transmitting power from the rear sprocket (12) to a transmission case (15),
Rear sprocket (1) inward of the transmission case (15)
2) and the brake device (16) of the rear axle (4) are arranged, and the transmission case (15) and the rear sprocket (12) are arranged.
Also, the brake device (16) is housed within the width of the crawler (10), two left and right brake devices (16) are provided, and the left and right brake devices (16A, 16B) are attached to the pitman arm (24). A brake structure for a full-crawler type vehicle, characterized in that a steering device (25) that is actuated left and right one by a motion, and a parking brake device (28) and a traveling brake device (65) that are simultaneously actuated left and right are linked together. . 2. A braking device (2) for each of the left and right sides.
The brake for a full crawler type vehicle according to claim 1, wherein the brake discs (A, 16B) share a brake disc (17) provided on the rear axle (4) and are arranged out of phase in the circumferential direction. Construction. 3. The parking brake device for simultaneously operating the left and right brake devices (16) on the upper part (U) of the vehicle by pulling a steering device (25) swinging a pitman arm (24) and an equalizer member (27). (28), the pitman arm (24) and the left and right brake devices (1
6), the left and right brake device (16) is operated by depressing the steering interlocking device (29) for independently operating the left and right brake device (16) by swinging the pitman arm (24) left and right, and the foot pedal (66). The steering interlocking means (29) has a traveling brake device (65) that operates simultaneously, and two interlocking wires are provided for pulling the end portion of the equalizer member (27) by the left and right swings of the pitman arm (24). (30) connects the pitman arm (24) and both ends of the equalizer member (27), and the left and right brake devices (16) are provided with two brake devices (16A, 16B) capable of both wire hydraulic operation. , The left and right two braking devices (16A, 16B) are connected to both ends of the equalizer member (27) via two wires (26), respectively. Rutotomoni traveling brake device (6
The brake structure for a full crawler type vehicle according to claim 1, characterized in that 5) is connected via four hydraulic pipes (71).