JPH01297382A - Crawler dolly mounted onto automobile - Google Patents

Abstract

PURPOSE:To improve practicality by allowing a dolly to be mounted by advancing an automobile on a road plate inside the dolly through an elevation slope in the rear part of the dolly, in a crawler dolly which is installed onto the lower part of a tire traveling automobile and permits the crawler traveling of the automobile. CONSTITUTION:When a crawler dolly 2 is installed onto an automobile 1, a drive shaft connection part 23 is installed onto the hub for rear part driving wheels 12 of the automobile 1 beforehand. Then, the automobile 1 is traveled slowly and allowed to ascend an elevation slope 33 from the rear part of the dolly 2 and advanced onto a road plate 5. When the rear part driving wheel 12 rides over the top part of the elevation slope 33, and the drive shaft connection part 23 is fitted into the opened port part of a guide body 24, the elevation slope 33 is lowering-operated, and the driven shaft connection part of the dolly 2 and the axis center of the driving shaft connection part 23 are allowed to coincide. Then, a holding member 27 is closed, and the automobile 1 is started in the state where the both connection parts are connected, and the driving power of the rear part driving shaft 12 is transmitted onto the driven shaft of the dolly 2, and the automobile is crawler-traveled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automobile-mounted crawler truck that is attached to the lower part of a tire-driven vehicle and converts the tire-driven vehicle to crawler travel.

[Conventional technology]

An automobile-mounted crawler dolly that attaches a crawler dolly to the bottom of a conventional tire-driven vehicle such as a truck, transmits the driving force of the truck's drive wheels to the crawler dolly, and replaces tire running with crawler running so that it can travel in wetlands, etc. It has been known.

In the above-mentioned conventional car-mounted crawler trolley, to attach the crawler cart to the car, the car is lifted with jacks, the crawler cart is inserted into the lower part of the car, and then the jacks are lowered.
The drive wheel shaft of the automobile and the passive shaft of the crawler truck are aligned to connect the two shafts.

[Problem to be solved by the invention]

However, since the tire diameter of automobile wheels changes depending on the tire air pressure and load, there is a problem in that it takes time and effort to align the two axles, and sometimes the jacks come off during attachment/detachment work, creating a danger.

The present invention has been made in view of the above-mentioned problems, and is an object of the present invention to solve this problem.Even if there is a change in the tire diameter of the wheel, the present invention is capable of moving the drive shaft connection part of the automobile and the passive drive shaft of the crawler bogie by simply moving the wheel. The axis of the shaft connection part automatically matches,
The purpose of the present invention is to provide an automobile-mounted crawler truck that can be safely and easily attached to an automobile while lowering the center of gravity.

[Means to solve the problem]

In order to achieve the above object, the present invention is an automobile-mounted type that is attached to the lower part of a tire-driven vehicle and connects the drive shaft connection portion of the vehicle with the passive shaft connection portion of the crawler truck to convert the tire-driven vehicle to crawler travel. In the crawler bogie, the drive shaft coupling portion of the automobile is received at the outer periphery of the passive shaft coupling portion of the crawler bogie through an opening having an appropriately larger diameter than the outer diameter of the drive shaft coupling portion, and the coupling portion is connected to the passive shaft coupling portion of the crawler bogie. A guide body is provided to guide the vehicle to a support position where the axis coincides with the axis, and the drive shaft of the automobile is raised and lowered below the guide body,
A vertically movable elevating slope is provided so that the drive shaft coupling portion of the vehicle faces the opening span of the guide body in the raised position and the coupling portion is received in the support position of the guide body in the lowered position; It is characterized by the provision of a road board for automobiles between the upper and lower crawlers along the inside of each of the left and right truck frames of the type crawler truck.

[For production]

An elevating slope is attached to the rear of the crawler truck, and the elevating slope is set in the raised position, and the vehicle is moved forward and up the elevating slope to advance onto the crawler truck. When the rear drive shaft of the vehicle rests on the top of the lifting slope in the raised position, the drive shaft connection portion of the vehicle faces the opening of the guide body. Here, even if the tire diameter of the drive shaft is not constant due to fluctuations in air pressure or vehicle load, the opening diameter of the guide body is appropriately larger than the outer diameter of the drive shaft connection part, so the drive shaft connection part is Facing the opening diameter. If the vehicle is moved forward slightly, the drive shaft will pass over the top of the lifting slope, and the drive shaft connection portion will be guided by the guide body and lowered to approximately the same position as the passive shaft connection portion of the crawler truck. Then, if the lifting slope is lowered, the drive shaft connection part will be received at the support position of the guide body.
The axis thereof and the axis of the passive shaft coupling portion of the crawler truck exactly match.

Thereafter, the drive shaft connection part and the passive shaft connection part of the crawler truck are connected, and the lifting slope is removed, and the car is driven, and the tire running car crawls.

Installing a crawler truck on a ridge does not involve lifting the car with jacks and inserting the crawler truck under the car, but simply advancing the car from the rear of the crawler truck onto the road board inside the crawler truck and raising and lowering the elevator slope. Therefore, it is safe and easy, and the axis alignment between the drive shaft connection part of the automobile and the passive shaft connection part of the crawler bogie is automatically aligned by the guide member regardless of fluctuations in the tire diameter of the drive wheel, which saves time and effort. This eliminates the time-consuming work of aligning the shafts.

In addition, since the above-mentioned car-mountable crawler truck has a road board for the car between the upper and lower crawlers along the inside of the left and right truck frames, the center of gravity is lower than that of a conventional crawler truck in which the car is mounted on the top. It is low and stable, and the road plate acts as a reinforcing material to increase the rigidity of the bogie frame.

〔Example〕

The present invention will be explained in detail below based on illustrated embodiments.

Fig. 1 is an overall side view of the bogie of the present invention, Fig. 2 is a half plan view of the bogie, Fig. 3 is a rear view of the bogie, and Fig. 4 is a detailed side view of the rear part of the bogie. Figure 5 is a plan sectional view of the rear part of the truck.

In the figure, reference numeral 1 indicates a vehicle such as a four-wheeled truck running on tires, and reference numeral 2 indicates an automobile-mounted crawler truck according to the present invention, which is mounted on the vehicle 1.

The crawler truck 2 consists of left and right truck frames 3 made of square pipes with the rear ends of the horizontal portions facing upward, and an extension frame 4 telescopically engaged with the front portions of the left and right truck frames 3.
A road board 5 for the vehicle 1 is provided along each inner side of the horizontal part of the vehicle 1, and the left and right truck frames 3.3 are connected to the left and right road board 5,
5 are integrally assembled by trapezoidal horizontal members 6.6 at two locations, front and rear. An idler wheel 7, a plurality of transfer wheels 8, and a drive sprocket 9 are pivotally supported from the front on the extension frame 4 and the truck frame 3, and an endless crawler 10 is wound around the idler wheel 7, roller wheels 8, and drive sprocket 9. , the road board 5 inside the truck frame 3 is located between the upper and lower crawlers 10. By tilting the road board 5 inwardly and upwardly as shown by the imaginary line in FIG. 3, the load of the wheels can be evenly transmitted to the contact surface of the crawler IO.

The extension frame 4 at the front of the bogie frame 3 can be expanded and contracted according to the distance between the front wheels 11 and rear drive wheels 12 of the automobile 1 and fixed with set screws 13, and the horizontal member 6 is also divided into two at the center. It is telescopically engaged, expands and contracts according to the distance between the left and right wheels of the automobile 1, adjusts the distance between the left and right truck frames 3, and fixes them with set screws 14, and can be divided into two parts for transportation, storage, etc. This is for convenience.

A seat 15 of an arc-shaped front wheel 11 is rotatably supported on a horizontal member 4a integral with the extension frame 4 by a shaft 16 on an extension of the road board 5. 1
1 stopper 17 is attached with an adjusting screw 18 so as to be movable forward and backward. Reference numeral 19 denotes a pressing member fixed to the stopper 17, which presses the upper part of the front wheel 11 and holds the front wheel 11 securely.

A passive shaft 20 that pivotally supports the drive sprocket 9 of the crawler truck 2 is located above the road board 5 approximately relative to the tire radius of the vehicle 1, and a ball bearing 21 is mounted at the rear of the truck frame 3.
A passive shaft connecting portion 22 is splined to the inner end of the shaft. A guide body 24 is provided on the outer periphery of the passive shaft coupling portion 22 to guide the drive shaft coupling portion 23 attached to the hub of the rear drive wheel 12 of the automobile 1 to the passive shaft coupling portion 22. An outer ring 25 is fitted on the outer periphery of the connecting portion 23 with a bearing so as to be rotatable with respect to the connecting portion 23 . The drive shaft connecting portion 23 and the passive shaft connecting portion 22 have the same structure as the pawl clutch 4, and can be freely connected and disconnected from each other by a lever 26.

The guide body 24 is formed in a C-shape, and the center P of the opening thereof is
1 is located at a slightly higher position rearward than the shaft center P2 of the passive shaft 20 of the crawler truck 2, and the opening diameter is the same as that of the drive shaft connecting portion 2 of the automobile 1.
The outer diameter is suitably larger than the outer diameter of No. 3.

27 closes the opening of the guide body 24 and connects both the connecting parts 22 and 23.
This is a holding member that reliably holds the inside of the guide body 24.

A brake device 28 is provided at the outer end of the passive shaft 20 of the crawler truck 2.
is attached, and the lever 2 of this brake device 28
8a is pivotally supported by the extension frame 4, and the front wheel support is mounted on the seat 15.
It is connected via a brake rod 29 to a link 30 connected to. Therefore, when the handle 32 in the driver's cab 31 is rotated left and right, the seat 15 of the front wheel 11 and the seat 15 rotate left and right, and in conjunction with this, the left and right brake rods 29 are pulled. The brake device 28 on the side operates to apply a brake to the passive shaft 20 of the crawler truck 2, and the crawler truck 2 is turned in the direction in which the handle 32 is turned. Note that the brake device 28 may be replaced with a clutch device that connects and disconnects the passive shaft 20 and the drive sprocket 9.

Reference numeral 33 denotes a lifting slope that is detachably attached to the rear of the crawler truck 2 through a connecting part 33a.The height of the top of the slope is the same as that of the drive shaft when the rear drive wheel 12 whose tire diameter varies somewhat is mounted on the top. The raised position where the connecting portion 23 faces the opening span of the guide body 24 and the drive shaft connecting portion 23 facing the opening span of the guide body 24
4, and move the jack 3 to the lowered position where both axes of the drive shaft coupling part 23 and the passive shaft coupling part 22 are completely defeated.
4 allows it to move up and down.

In the car-mounted crawler truck on the ridge, if it has been disassembled and stored, the left and right truck frames 3 are assembled together with front and rear horizontal members 6.6, and an extension frame 4 is connected to the front part. At this time, the horizontal member 6 and the extension frame 4 are adjusted to extend or contract according to the left and right wheel spacing and the front and rear wheel spacing of the vehicle 1 to be installed.
Fix with setscrews 13 and 14. However, passive shaft 7
, the crawler 10 is wound around the rolling wheels 8 and the drive sprocket 9, and the link 3 is connected to the brake rod 29 whose length is adjusted by a buckle 29a to the seat 15 of the front wheel 11.
0 and the brake lever 28a, and then a lifting slope 33 is attached to the rear of the crawler truck 2 by a connecting portion 33a. The lifting slope 33 is raised by the jack 34 to the raised position shown by the solid line in FIG.

A drive shaft coupling part 23 is attached in advance to the hub of the rear drive wheel 12 of the automobile 1, and the automobile 1 is driven slowly and a lifting slope 33 is raised from the rear of the crawler truck 2 to advance onto the road board 5. When the rear drive wheel 12 rides on the top of the lifting slope 33, the drive shaft connecting portion 23 faces the opening of the guide body 24. Here, even if the tire diameter of the rear drive wheel 12 is not constant due to fluctuations in air pressure or vehicle load, the opening diameter of the guide body 24 is set to be appropriately larger than the outer diameter of the drive shaft coupling part 23. , the drive shaft connecting portion 23 faces the opening span. Note that if the car l is moved forward slightly, the rear drive wheels 12
passes over the top of the lifting slope 33 and connects the drive shaft connecting portion 23.
enters the opening and is guided by the guide body 24 to a position where the axis substantially coincides with the passive shaft connecting portion 22 of the crawler truck 2. If the lifting slope 33 is lowered by the jack 34, the drive shaft connecting portion 23 follows the trajectory shown by the two-dot chain line in FIG. exactly coincides with the axis of the passive shaft coupling portion 22 of the crawler truck. Outer ring 25 of guide middle drive shaft connection part 23
The guide body 2 rotates freely relative to the connecting portion 22b.
4. Transfer without sliding, and be guided easily.

When the axes of both connecting parts 22 and 23 coincide, the holding member 27 is closed, and the lever 26 is operated to remove both connecting parts 22 and 23.
Concatenate. Then, the stopper 17 of the front wheel 11 is moved to the front wheel 11 using the adjustment screw 18, and the holding member 19 is used for a front wheel bar-type vehicle. Retract to the horizontal position shown in , and rotate upward after mounting.

The crawler truck 2 is now attached to the car l, and the crawler truck 2 is attached to the car l.
When the crawler truck 2 starts, the driving force of the rear drive wheels 12 is transferred to the crawler truck 2.
is transmitted to the passive shaft 20 of the vehicle 1, and the vehicle 1 crawls. When the steering wheel 32 of the automobile 1 is rotated left and right as in normal automobile driving, the brake device 28 on the rotated side applies a braking action to the passive shaft 20 of the crawler truck 2, allowing the vehicle to freely turn around. I can do it. When the automobile 1 is to be unloaded from the crawler truck 2, it can be easily unloaded by reversing the procedure described above.

FIG. 7 is a side view showing another embodiment of the lifting slope. This lifting slope 37 is attached to the rear of the crawler truck 2 with a bin 38 so that it can rotate up and down, and a stopper 40 integrated with a lever 39 is attached to the rear of the crawler truck 2. It is urged backward by a spring (not shown). The lifting slope 37 is held by a stopper 4° in both a downward position shown by a solid line in FIG. 7 and a raised position shown by a two-dot chain line. In the descending position, the top 37a of the lifting slope 37 is set slightly higher than the top surface of the road board 5 of the crawler truck 2,
When the rear drive wheel 12 rides on the top portion 37a in this state, the drive shaft connecting portion 23 is positioned slightly above the cast guide body 41 compared to the guide body 24 of the embodiment described above, even if there is some variation in the tire diameter. do. When the lever 39 is pulled forward, the stopper 40 comes off and the lifting slope 37 jumps up, the rear drive wheel 12 descends, and its drive shaft connection part 23 is received by the guide body 41, which connects the passive shaft of the crawler truck 2. The part and axis are automatically aligned. Jumping up and down slope 37
The crawler truck 2 is held in the flipped up position by the stopper 40 which returns to the rear with the elasticity of the spring, and the crawler truck 2 can continue to travel as it is, and the lifting slope 37
Acts as a rear fender. When lowering the car from the crawler truck 2, the user releases the connection and steps down on the lifted up/down slope 37 with his/her foot, thereby using the cam action between the front end of the up/down slope 37 and the stopper 40.
The stopper 40 is moved forward and the lifting slope 37 is lowered, and at the same time, its top 37a pushes up the rear drive wheel 12 and lifts the drive shaft connecting portion 23 from the guide body 41. Then, the lifting slope 37 is held in a descending position by the stopper 40 which has returned elastically with the rear drive wheel 12 pushed up, so that the automobile can be moved away.

As mentioned above, this elevating slope 37 is always installed on the crawler truck 2, so the trouble of attaching and detaching it is saved.
Moreover, since it acts as a rear fender when traveling on a crawler, it is possible to improve traveling safety.

〔Effect of the invention〕

As explained above, the present invention provides an automobile-mounted crawler that is attached to the lower part of a tire-driven vehicle and connects the drive shaft connection portion of the vehicle to the passive shaft connection portion of the crawler truck to convert the tire-driven vehicle to crawler travel. In the bogie, the drive shaft coupling portion of the automobile is received at the outer circumference of the passive shaft coupling portion of the crawler bogie through an opening having an appropriately larger diameter than the outer diameter of the drive shaft coupling portion, and the coupling portion is connected to the passive shaft coupling portion of the crawler bogie. A guide body is provided to guide the vehicle to a support position where the axes coincide with each other, and the drive shaft of the vehicle is raised and lowered below the guide body, and in the raised position, the drive shaft connection portion of the vehicle is brought into contact with the opening span of the guide body. It is equipped with a vertically movable lifting slope that allows the connecting part to be received in the support position of the guide body in the lowered position.To install the crawler truck, lift the car with jacks and insert the crawler truck under the car. It is safe and easy because the vehicle is moved from the rear of the crawler truck onto the road board inside the crawler truck and the lifting slope is raised and lowered. The guide member automatically aligns the axes with the drive wheels regardless of variations in the tire diameter of the drive wheels, thereby eliminating the need for time-consuming axle alignment work.

In addition, since the above-mentioned car-mountable crawler truck has a road board for the car between the upper and lower crawlers along the inside of the left and right truck frames, the center of gravity is lower than that of a conventional crawler truck in which the car is mounted on the top. It is low and stable, and the road board can act as a reinforcing material to increase the rigidity of the bogie frame.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall side view of the bogie of the present invention, FIG. 2 is a half plan view of the same bogie, FIG. 3 is a rear view of the same bogie, and FIG. The figure is a detailed side view of the rear of the same truck.
Figure 5 is a plan sectional view of the rear part of the same truck, Figure 6 is a detailed view of the horizontal frame connection part, and Figure 7 is another implementation of the lifting slope.
FIG. ■... Car, 2... Crawler trolley, 3... Dolly frame, 5... Road board, 12... Rear drive wheel, 22
...Passive shaft connection part of crawler truck, 23...Drive shaft connection part of automobile, 24...Guide body, 33.37...
- Lifting slope. Patent applicant: Mitsubishi Agricultural Machinery Co., Ltd. - Agent: Patent attorney Akihiro Inaba

Claims (1)

[Claims] 1. An automobile-mounted crawler truck that is attached to the lower part of a tire-driven vehicle and converts the tire-driven vehicle into a crawler vehicle by connecting the drive shaft connection portion of the vehicle and the passive shaft connection portion of the crawler truck. , the drive shaft coupling part of the automobile is received in the outer circumference of the passive shaft coupling part of the crawler bogie through an opening having an appropriately larger diameter than the outer diameter of the drive shaft coupling part, and the coupling part is connected to the passive shaft coupling part of the crawler bogie and the shaft. A guide body is provided that guides the vehicle to a support position where the centers are aligned, and the drive wheel of the vehicle is raised and lowered below the guide body, and the drive shaft coupling portion of the vehicle is exposed to the opening span of the guide body in the raised position. A crawler truck mounted on an automobile, characterized in that it is provided with a vertically movable elevating slope that allows the connecting portion to be received in the supporting position of the guide body in the lowered position. 2. The vehicle-mountable crawler truck according to claim 1, wherein the vehicle-mountable crawler truck is provided with a road board for the vehicle between the upper and lower crawlers along each inner side of the left and right truck frames.