Patent Description:
Track is a kind of traditional driving device, with history of more than <NUM> years since its invention. As excellent traction ability, mobility and stability, it is still a basic form of driving device. At present, the crawler driving device is not only used in agriculture tractor, but also mainly used in rice harvester, military vehicles, construction machinery, etc..

The traditional crawler driving device has the following drawbacks: the roller set is a two-row structure, with a high pressure on each roller wheel and poor stability of the overall structure ; The rubber track structure is relatively simple, single-tooth structure located in the middle of the rubber track, easy to cause uneven force on the both sides, thus causing damage to the track; the roller wheels are fixed on the track bracket, where there is an obstacle on the ground, the roller wheels bump transmit the impact force received to the machine body, thus causing the machine shake and uncomfortable to driver. <CIT> disclosed a kind of track systems for traction of a vehicle in which a spacing of laterally-adjacent ones of the track systems in a widthwise direction of the vehicle is adjustable. This may facilitate use of the vehicle in different conditions. For instance, the spacing of the laterally-adjacent ones of the track systems may be adjustable while the laterally-adjacent ones of the track systems are connected to a power train of the vehicle and/or without requiring use of additional parts such as spacers.

The invention provides a crawler driving device, to solve these problems that mentioned in the above background technology, these problems respectively are the high pressure on roller wheel, uneven pressure on rubber track, and causes the machine body's shake.

The technical problems solved by the invention are realized by the following technical solutions:.

A crawler driving device, includes a main frame, a driving wheel that is rotationally set over the main frame, idler wheels that are rotationally set at both ends of the main frame, couple of roller wheels that are fixed under the main frame at intervals along a driving direction of the crawler driving device, and a track that is set at the outside of the driving wheel, the idler wheels and the roller wheels. wherein, the main frame includes a beam, V-shaped brackets that are linked with both sides of the beam respectively, a connecting rod that is connected to the both V-shaped brackets, a space is formed by the V-shaped brackets to accommodate the driving wheel; the idler wheels include guide rods that are set at both ends of the beam respectively, a rotating shaft that is set at the end of each of the guide rods, and the idler wheels are mounted on the both sides of the rotating shaft. Each roller wheel includes a mechanical balancer, roller wheels that are rotationally connected with both ends of the mechanical balancer, a center position of the mechanical balancer being rotatably connected with the bottom of the beam. Teeth that are set on the inner wall of the track engageable with the driving wheel, the roller wheels enable the rubber track to move.

A pin is configured to link the middle position of the both sides of the beam with the bottom of the V-shaped brackets.

Preferably, restriction plates are set in the middle position of the both sides of the beam to limit the swing angle of the V-shaped brackets.

Preferably, the idler wheels are rotationally set at the two ends of the beam and support the rubber track, the idler wheels including a front idler wheel and a rear idler wheel.

Preferably, the mechanical balancer is rotationally installed at the bottom of the both ends of the beam by a pin.

Further preferably, the mechanical balancer includes a plate, an upper bearing seat that is assembled at the bottom of the both ends of the plate, a lower bearing seat which is used with the upper bearing seat together and form a through-hole between the upper and the lower bearing seats, the through-hole being used for inserting a rotating shaft, and the roller wheels being assembled at the both sides of the rotating shaft.

Preferably, the teeth are arranged in three rows, and are set on the inner wall of the rubber track, the three rows of teeth are respectively first row teeth, second row teeth, and third row teeth.

Further preferably, some teeth that are used for mud cleaning are set at the both sides of the inner wall of the rubber track.

Preferably, the crawler driving device further includes a tension mechanism, the tension mechanism including a hydro-cylinder mounted on the connecting rod over the front idler wheel, and tensioning wheels rotationally linked with the hydro-cylinder.

The beneficial effects of the invention are:.

Wherein, <NUM>-the main frame <NUM>-beam <NUM>-V-shaped brackets <NUM>-connecting rod.

In order to further explain the technical solutions of the invention, the following is a detailed elaboration of the invention through specific embodiments.

It should be noted that in the embodiments "both sides" is the left and right directions along the driving direction of the crawler driving device, "both ends" is the front and rear directions along the driving direction of the crawler driving device.

As shown in <FIG>, the invention relates to a crawler driving device, includes the main frame <NUM>, driving wheel <NUM>, idler wheels <NUM>, roller wheels <NUM>, track <NUM> and tensioning mechanism <NUM>.

As shown in <FIG>, the driving wheel <NUM> rotationally set over the main frame <NUM> and contact with track <NUM>, and the driving wheel <NUM> is over the middle position of the main frame along the front and rear directions of the crawler driving device, the idler wheels <NUM> mounted on the both ends of the main frame <NUM>, couple of roller wheels <NUM> installed under the both sides of frame body along the driving direction of the crawler driving device, rubber track <NUM> set at the outside of the driving wheel <NUM> idler wheels <NUM> roller wheels 40and tensioning mechanism <NUM>, the teeth on the inner wall of the rubber track <NUM> engage with driving wheel <NUM>, enabling driving wheel drive rubber track to move.

As shown in <FIG>, described main frame <NUM> includes beam <NUM>, V-shaped brackets <NUM> that linked with the both sides of the beam <NUM> respectively, connecting rod <NUM> that connected the top of the one V-shaped bracket <NUM> with the top of the other V-shaped bracket <NUM>; the space that is formed by V-shaped brackets (<NUM>) is used to accommodate the driving wheel <NUM>; linking the middle position of the both sides of the beam <NUM> with the bottom of V-shaped brackets <NUM> by pin <NUM>.

Setting restriction plate <NUM> in the middle position of the both sides of beam <NUM> in order to limit the swing angle of the V-shaped brackets <NUM>.

As shown in <FIG>, the beam <NUM> is composed of three same supporting plates that set at intervals, the both ends of the three supporting plates respectively fixed with plate <NUM> into a whole ,connecting bracket <NUM> that connect with the thrust wheel groups <NUM> is set at the bottom of supporting plates (As shown in <FIG>).

As shown in <FIG>, the driving wheel <NUM> includes the rotating fluted disc <NUM> the side plate <NUM> the rotating disc <NUM> the connection bar <NUM>.

The side plate <NUM> uniformly distributed and inserted in the teeth of the rotating fluted disc <NUM>, the rectangular notch at the bottom of the side plate <NUM> stuck out the center of the teeth and perpendicular to the teeth, two rotating disc <NUM> separately insert in the symmetrical notch at top of the side plate <NUM>, the rotating disc <NUM> is perpendicular to the side plate <NUM> and parallel to the rotating fluted disc <NUM>, and the center of two rotating disc is coincident , some holes uniformly set on the two rotating discs <NUM> and the position of holes in the two rotating disc is same , the connection bar <NUM> respectively inserted in the corresponding holes of the two rotating discs <NUM>, when walking device works, the connection bar <NUM> drive the teeth <NUM> of the inner wall of track <NUM>, thus drive track <NUM> to walk.

As shown in <FIG>, the idler wheels <NUM> include guide rod <NUM> mounted on fixed plate <NUM> , the other end of guide rod <NUM> rotating connect with the first rotating shaft <NUM>, the both sides of the first rotating shaft <NUM> separately connect with two idler wheels <NUM>.

The idler wheels in the invention is composed of the front idler wheel <NUM> and the rear idler wheel <NUM>, separately assembled at the front and rear of the beam <NUM>.

As shown in <FIG> <FIG>, there are <NUM> roller wheel sets, separately rotationally assembled at the bottom of the both sides of the main frame by pin <NUM>, each roller wheel <NUM> includes mechanical balancer <NUM>, the roller wheel <NUM> rotating connect with the both ends of the mechanical balancer <NUM>.

As shown in <FIG>, the mechanical balancer <NUM> includes the plate <NUM>, the upper bearing seat <NUM> that assembled at the bottom of the both ends of the plates <NUM>, the lower bearing seat <NUM> that using with upper bearing seat together and form a through-hole <NUM> between the upper bearing seat and the lower bearing seat , the through-hole <NUM> used for inserting the second rotating shaft (not show in picture), and the roller wheels <NUM> assembled at the both sides of the second rotating shaft, and the roller wheels <NUM> is at the both sides of the plates <NUM>.

Setting the fourth through hole <NUM> at the top of the middle of the plate <NUM> , which link with the connecting bracket <NUM> by pin <NUM>.

There are <NUM> roller wheels <NUM> for each roller set in the invention.

As shown in <FIG>, the teeth <NUM> uniformly distributed on the inner wall of the track <NUM>, Set <NUM> rows teeth <NUM> on the inner wall of the rubber track <NUM>, respectively are the first row teeth <NUM>, the second row teeth <NUM>, the third row teeth <NUM>; the driving device works, the teeth <NUM> engage with the driving wheel <NUM>, the driving wheel <NUM> drive the <NUM> rows teeth <NUM> and then the track <NUM> to rotate, the design of <NUM> rows teeth <NUM> make more even force on the track, and effectively improve the force distribution on track <NUM>, and prolong the rubber track <NUM> life.

There are same interval space <NUM> during <NUM> rows teeth, the interval space <NUM> can accommodate the two middle wheels of the idler wheels <NUM> the roller wheels <NUM> and the tensioners <NUM>.

Setting some teeth <NUM> at the two ends of the inner wall of the rubber track <NUM>, and distributed at same interval, the shape of tooth <NUM> is similar to pyramid make the mud to easily drop from the track <NUM> and thus achieve the effect of cleaning.

As shown in <FIG> <FIG>, the tension mechanism <NUM> includes hydro-cylinder <NUM>, tension wheel group <NUM>, the one end of the hydro-cylinder <NUM> fixed on the connection rod <NUM> by supporting bracket <NUM>, the other end link with tensioned <NUM> by pin.

The V-shaped bracket <NUM>, driving wheel <NUM> is installed on driving axle of the machine, when the driving axle turn, the driving wheel move as well, driving wheel <NUM> engage with the teeth of inner wall of the rubber track, thereby drive track <NUM> to move, the roller set swing up and down during moving, and also supporting frame for the crawler driving device. The roller wheel at the both sides of the main frame can swing up and down with taking the rotating shaft <NUM> in the middle of the oscillating deck as fulcrum. when the crawler driving device run into obstacles, the four roller wheel sets at the both ends of the mechanical balancer buffers force synchronously, thus ensure smoothly drive. the idler wheels mainly play guiding role, the tension mechanism achieves tensioning adjustment between track and wheel groups under the action of the hydro-cylinder.

Claim 1:
A crawler driving device including a main frame (<NUM>), a driving wheel (<NUM>) that is rotationally set over the main frame (<NUM>), idler wheels (<NUM>) that are rotationally set at both ends of the main frame (<NUM>), couple of roller wheels (<NUM>) that are fixed under the main frame (<NUM>) at intervals along a driving direction of the crawler driving device, and a track (<NUM>) that is set at the outside of the driving wheel (<NUM>), the idler wheels (<NUM>) and the roller wheels (<NUM>);
the main frame (<NUM>) includes a beam (<NUM>), V-shaped brackets (<NUM>) that are linked with both sides of the beam (<NUM>) respectively, a connecting rod (<NUM>) that is connected to the both V-shaped brackets (<NUM>); a space is formed by the V-shaped brackets (<NUM>) to accommodate the driving wheel (<NUM>);
the idler wheels (<NUM>) include guide rods (<NUM>) that are set at both ends of the beam (<NUM>) respectively, a rotating shaft (<NUM>) that is set at the end of each of the guide rods (<NUM>), and the idler wheels (<NUM>) are set at both sides of the rotating shaft (<NUM>);
each roller wheel (<NUM>) includes a mechanical balancer (<NUM>), roller wheels (<NUM>) that are rotationally connected with both ends of the mechanical balancer (<NUM>), a center position of the mechanical balancer (<NUM>) being rotatably connected with the bottom of the beam (<NUM>);
teeth (<NUM>) that are set on the inner wall of the track (<NUM>) engageable with the driving wheel (<NUM>), the roller wheels (<NUM>) enabling the rubber track (<NUM>) to move; characterized in that:
a pin (<NUM>) is configured to link the middle position of the both sides of the beam (<NUM>) with the bottom of the V-shaped brackets (<NUM>).