JP2009046094A - Crawler traveling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To resolve problems that, when a crawler traveling device travels on or hits a furrow, a ridge, a bank or the like during crawler traveling, in order to easily rise over such an obstacle and absorb and mitigate a traveling impact generated at that time, the crawler traveling device in a large form has a great height difference between its ground rollers and front-end rollers, capable of forming long upward sloping surfaces at front ends of crawler belts stretched therebetween in a tensed state to facilitate over-ridge traveling, the crawler traveling device in a small form, in contrast, cannot easily form long upward sloping surfaces (facing angle) at front ends of the crawler belts because the front-end rollers and the ground rollers are disposed in a form in which they are aligned at almost the same grounding positions. <P>SOLUTION: The crawler traveling device is characterized in that the front-end rollers 3 ahead of the ground rollers 2 with the crawler belts 1 wound and tensed thereon are elastically energized downward to crawler frames 4 by springs 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a small crawler traveling apparatus using a crawler belt mainly made of rubber, and is intended to provide buffering and traveling simplification with a simple configuration.

A technique of a crawler traveling device in which a crawler belt is wound between a front end roller disposed at the front and rear end portions of the crawler frame and a rear end roller is known (for example, see Patent Document 1).
JP-A-10-81271 (second page, FIG. 1)

  When crawling on a crawler, on a shore, on a shore, etc., or when it collides, it is easy to ascend them, and in order to absorb and mitigate the traveling impact force at this time, in a large form crawler traveling device, There is a large difference in height between the ground roller and the front end roller, and a long rising inclined surface is formed on the front end portion of the crawler belt stretched between them to facilitate the overpass traveling or the like. However, in the small crawler running form, the front end roller and the grounding wheel are arranged in a form in which they are arranged at substantially the same grounding position, so that a long rising inclined surface (orientation angle) is formed at the front end part of the crawler belt. It is difficult to do.

  The invention according to claim 1 is characterized in that the front end roller 3 in front of the grounded roller 2 that wraps and applies the crawler belt 1 is elastically biased downward by a spring 5 against the crawler frame 4. The crawler traveling device is configured. The crawler belt 1 can be driven and run in a state where it is wound around the grounding roller 2, the front end roller 3, and the like. When the front end portion of the crawler belt 1 hits the uneven portion of the traveling soil surface or the shore of the traveling soil during forward traveling, the front end rolling wheel 3 moves up and down in a certain region against the spring 5 due to this resistance. As a result, an inclined surface (orientation angle) such as a front ascending is generated in the front end grounding portion of the crawler belt 1, and a ground contact form along the soil uneven surface or the like is obtained, so that the uneven surface can be easily climbed and traveled.

  The invention according to claim 2 is characterized in that a roller frame 7 having a shaft 6 mounted on the front end roller 3 is supported by a shaft 8 so as to swing up and down with respect to the front end portion of the crawler frame 4. is there. Since the front end roller 3 that winds and tensions the front end portion of the crawler belt 1 is mounted on the front end of the roller frame 7 that protrudes and is supported in front of the crawler frame 4, the front end roller 3 is located on the shore. When the traveling resistance due to the above is received, it moves up and down against the spring 5, and the front end portion of the crawler belt 1 extending between the ground roller 2 and the front end roller 3 forms an inclined surface B that is inclined up and down, Make it easy to ascend the shore. When the ground contact surface is in the front-rear horizontal state, the wheel frame 7 is in the front horizontal state and the crawler belt 1 is pressed by the spring 5 so that the entire length is grounded horizontally to support the vehicle body. Can be driven.

  According to a third aspect of the present invention, the spring 5 is stretched between the wheel frame 7 and a swing arm 10 that supports the upper loading platform 9 and is provided so as to be rotatable up and down with respect to the crawler frame 4. It is characterized by being provided with pressure. Since the front end roller 3 is constantly pressed downward by the spring 5, the front end portion of the crawler belt 1 is grounded to the traveling soil surface. When it strikes the shore part or the like during traveling, the swing arm 10 rotates upwardly around the support shaft 8 against the spring 5 and rises at the front end of the crawler belt 1 to form an inclined surface. In addition to facilitating traveling on the shore or the like, it is possible to absorb a collision impact force against the shore or the like at this time. The handle operated by the operator is mainly provided on the rear side of the vehicle body integrated with the crawler frame 4 side and the like, and it is possible to make it difficult to transmit such shocks and vibrations. A part of the loading platform 9 configured above is supported by the wheel frame 7 via the spring 5 and is therefore buffered by the spring 5.

  In the first aspect of the present invention, when the front end roller 3 hits a shore or the like and receives running resistance during forward travel by driving the crawler belt 1, the front end roller 3 and the front end roller 3 are wound around the front end roller 3. The front end portion of the crawler belt 1 is moved upward against the spring 5, and a long inclined surface B is formed on the front end portion of the crawler belt 1 to make it easy to ascend the shore and the like. The impact force can be absorbed and alleviated, and the crawler belt 1 is maintained in a state in which it is always easy to contact with the entire length of the crawler belt 1 so that the vehicle body can be supported and traveled stably and smoothly.

  Since the invention according to claim 2 is a form in which the wheel frame 7 on which the front end wheel 3 is mounted is projected to the front side of the crawler frame 4, the front-rear tension pressure form of the crawler belt 1 can be stabilized. The grounding traveling state of the front end portion of the crawler belt 1 and the grounding interval are maintained to be long so that the vehicle body is supported and traveling is facilitated. A long upward inclined surface B can be formed at the front end portion of the crawler belt 1 by the vertical rotation angle of the wheel frame 7, so that the impact force and the like when receiving a running resistance such as a shore can be absorbed smoothly, It is possible to easily carry over the vehicle. Further, since the roller frame 7, the front end roller 3 and the like are positioned on the front side of the crawler frame 4, the crawler as a whole can be reduced in height and can be configured in a simple and small form.

  According to the third aspect of the present invention, the spring 5 absorbs and relaxes impact force such as collision, running resistance, etc. against the front end portion of the crawler belt 1 and the heel of the front end roller 3 by the above configuration, and Absorbing vibrations and swings, the stable posture of the loading platform 9 can be maintained, and cargo collapse can be prevented. Moreover, it is possible to simplify the support structure of the spring 5 that also functions as these.

  Based on the illustrated example, the construction of a transport vehicle having a pair of left and right crawler belts 1 and capable of traveling by driving an engine 11 is provided with a transmission case 13 at the rear part of a vehicle body 12 and the engine on the transmission case 13. 11 is installed to transmit the internal transmission mechanism. In addition, the steering wheel 14 is provided in the rear upper direction, and the vehicle is operated while walking. A loading platform 9 is mounted on the front side of the engine 11. The traveling device hangs the crawler belt 1 around the outer periphery of the front end roller 3, the rear end sprocket wheel 15, the grounded wheel 2, and the like arranged along the crawler frame 4, and transmits the sprocket shaft 16 to the transmission case 13. By driving from the mechanism, it can run in a rotating manner.

  Here, the crawler traveling device according to the present invention is configured to elastically urge the front end roller 3 in front of the ground roller 2 that winds and tensions the crawler belt 1 downward by the spring 5 against the crawler frame 4. The crawler traveling device is characterized. The crawler belt 1 can be driven and run in a state where it is wound around the grounding roller 2, the front end roller 3, and the like. When the front end portion of the crawler belt 1 hits the uneven portion of the traveling soil surface or the shore of the traveling soil during forward traveling, the front end rolling wheel 3 moves up and down in a certain region against the spring 5 due to this resistance. As a result, an inclined surface B (orientation angle) such as a front ascending is generated at the front end grounding portion of the crawler belt 1, and a grounding form is formed along the soil uneven surface and the like so that the uneven surface can be easily climbed and traveled.

  Further, the wheel frame 7 having the shaft 6 mounted on the front end roller 3 is supported by a shaft 8 which can swing up and down with respect to the front end portion of the crawler frame 4. Since the front end roller 3 that winds and tensions the front end portion of the crawler belt 1 is mounted on the front end of the roller frame 7 that protrudes and is supported in front of the crawler frame 4, the front end roller 3 is located on the shore. When the traveling resistance due to the above is received, it moves up and down against the spring 5, and the front end portion of the crawler belt 1 extending between the ground roller 2 and the front end roller 3 forms an inclined surface B that is inclined up and down, Make it easy to ascend the shore. When the ground contact surface is in the front-rear horizontal state, the wheel frame 7 is in the front horizontal state and the crawler belt 1 is pressed by the spring 5 so that the entire length is grounded horizontally to support the vehicle body. Can be driven.

  Further, the spring 5 is provided by being tensioned between a swinging arm 10 that supports the upper loading platform 9 and is pivotable up and down with respect to the crawler frame 4 and the wheel frame 7. It is what. Since the front end roller 3 is constantly pressed downward by the spring 5, the front end portion of the crawler belt 1 is grounded to the traveling soil surface. When the vehicle strikes against the shore or the like during traveling, the swing arm 10 rotates upward around the support shaft 8 against the spring 5 and rises at the front end of the crawler belt 1 to form an inclined surface B. As a result, it is possible to easily travel up the shore and the like, and to absorb a collision impact force against the shore at this time. The handle operated by the operator is mainly provided on the rear side of the vehicle body integrated with the crawler frame 4 side and the like, and it is possible to make it difficult to transmit such shocks and vibrations. A part of the loading platform 9 configured above is supported by the wheel frame 7 via the spring 5 and is therefore buffered by the spring 5.

  A pair of left and right crawler frames 4 are provided forward from the outer side of the mission case 13, and the axle housing projects from the left and right outer side of the rear mission case 13 to support the sprocket shaft 16. The ground roller 2 is rotatably disposed at the front and rear ends of a seesaw arm 17 that swings in the form of a front and rear seesaw at an intermediate portion of the crawler frame 4. It is possible to swing while being supported by the ground contact pressure of the crawler belt 1 while being swung up and down. Roller frames 7 that support the front end roller 3 with a shaft 6 are arranged on both the left and right sides of the wheel shaft 6, and an extendable socket 19 can be rotated up and down around the support shaft 8 at the front end of the crawler frame 4. To support. Each of the left and right wheel arms 7 has an adjustment screw 20 on the outside, and by rotating the adjustment screw 20, the wheel arm 7 is moved back and forth with respect to the socket 19 to adjust the arm length. can do.

  A swing arm 10 is pivotally supported 21 at the front end of each crawler frame 4 so as to be rotatable up and down, and the swing arm 10 is supported by a socket 19 of the wheel arm 7 via a spring 5. The bottom of the loading platform 9 is pivotally supported 22 at the front end. The bottom portion of the loading platform 9 pivotally supports the front portion 22, but the rear end portion is supported on a connecting frame 24 that connects the left and right crawler frames 4 via a damper 23. The loading platform 9 is simply mounted on the upper side of the vehicle body 12, but a damper cylinder such as a hydraulic expansion / contraction configuration is provided between the loading platform 9 and the connecting frame 24 and the like, and a dump is formed around the pivot shaft 22 of the swing arm 10. A possible configuration can also be adopted. Further, a stopper 25 for locking the downward movement position around the support shaft 8 of the wheel frame 7 that is springed by the spring 5 is provided at the lower front end of the crawler frame 4, and the front end of the crawler belt 1 or The lower limit position of the front end roller 3 is regulated to maintain a stable traveling state. The position of the stopper 25 is set so that the lower end portion of the front end of the crawler 1 is substantially the same position as the front end portion of the grounding roller 2 or slightly lower than this, and the spring 5 is compressed to rise. When in the position, the lower side of the front end rises to form a slanted surface B having a gentle turning angle (gradient) A.

  The crawler belt 1 is stretched by the front and rear rollers 3 and 15 and the grounding roller 2 and travels while rotating on the ground. Both the front and rear wheels 3 and 15 are always in a grounded state, and the crawler The crawler belt 1 itself is guided to rotate while receiving a ground pressure through the belt 1. Then, when the front end of the crawler belt 1 steps on the uneven surface of the ground during forward traveling, the front end rolling wheel 3 that receives the spring action of the spring 5 is an area at an appropriate height above the position of the stopper 25. Is pivoted up and down around the support shaft 8 so that the bottom portion located in front of the grounding wheel 2 at the front end of the crawler belt 1 forms a rising slope B over an appropriate angle (orientation angle) A. In this way, the front end portion of the crawler belt 1 moves upward against the spring 5 to absorb the resistance force and the impact force, and the inclined surface B is formed to rise the ground such as the protruding portion. It makes things easier. Further, the front end portion of the crawler belt 1 as described above forms an inclined surface B around the support shaft 8 at the front end portion of the crawler frame 4 by the vertical rotation of the roller frame 7. The length of the ground is almost the same, and provides ground support during stable running. In addition, since the swing arm 10 that supports the loading platform 9 is supported by the wheel frame 7 via the spring 5, the loading platform 9 can also be isolated from vibration.

The side view of a crawler traveling device. The top view of the one part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Crawler belt 2 Ground roller 3 Front end roller 4 Crawler frame 5 Spring 6 Roller shaft 7 Roller frame 8 Support shaft 9 Loading platform 10 Swing arm

Claims (3)

  A grounding roller (2) for winding and tensioning the crawler belt (1) is elastically biased downward by a spring (5) with respect to the crawler frame (4). Crawler travel device.   A wheel frame (7) having a shaft (6) mounted on the front end roller (3) is supported on a shaft (8) so as to be swingable up and down with respect to the front end portion of the crawler frame (4). Item 2. The crawler traveling device according to Item 1.   The spring (5) is supported between the swing frame (7) and the swinging arm (10), which supports the upper loading platform (9) and is provided so as to be rotatable up and down with respect to the crawler frame (4). The crawler traveling device according to claim 1, wherein the crawler traveling device is provided with tension.

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