JP3025971U - Traveling equipment for transport vehicles - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: It is possible to mount left and right crawlers with a narrow tread of a carrier, thereby expanding the limit of traveling on a narrow road width, and easily by gently turning or turning on the spot even in a narrow farmland, The direction can be changed swiftly and smoothly, and it can be made into a series with a conventional carrier. SOLUTION: Left and right crawlers 2a, 2b rotatably wound around front and rear wheels 13, 19 of a transport vehicle, and left crawler 2a, right crawler 2b by transmission of power of a prime mover.
It is composed of two independent transmission devices 3 which are controlled to rotate and stop in forward and backward directions by continuously variable transmission in response to each rear wheel body 13 which applies a rotational force to each of them simultaneously or separately. The transmission 3 is arranged so as to be displaced from the front-rear direction in parallel with the vehicle width direction so as not to come into contact with each other, and the inter-wheel distance b between the front and rear wheels 13 and 19 of the left crawler 2a and the front and rear of the right crawler 2b. A traveling device for a transport vehicle having a difference in the distance b between the wheels 13 and 19 is configured.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a traveling device for a transport vehicle in which the left and right crawlers of the transport vehicle rotate or stop in a forward direction and a reverse direction at the same time or separately by continuously variable speed.

[0002]

[Prior art]

 As an agricultural transporting vehicle for transporting agricultural products, for example, as shown in FIG. 4, a transmission 3 that receives a power of a prime mover and applies a rotational force to the left and right crawlers 2a and 2b is mounted. With the function conversion, it is possible to move forward, reverse, and stop continuously, and to stop the rotation of either the left or right crawler 2 and to rotate the other crawler 2 while using this stop position as a fulcrum for a quick turn. The type that can make a gentle turn is the mainstream.

However, although such a traveling device 1 has an advantage that a small turn can be made by gently turning the transport vehicle, it is a turn that is even smaller than the gentle turn and remains as it is at the stop position of the transport vehicle. There is the inconvenience that it cannot turn on the spot, there is a limit to the turning in a narrow farmland, and it is not possible to change direction quickly.

Therefore, in order to further improve the maneuverability of the transport vehicle, conventionally, as shown in FIGS. 5 to 6, two independent transmissions corresponding respectively to the left crawler 2a and the right crawler 2b are provided. 3 are mounted so that rotation outputs in opposite directions can be simultaneously obtained from the respective transmissions 3, and these crawlers 2 can be simultaneously rotated in opposite forward and backward directions to perform in-situ turning. ing.

[0005]

[Problems to be Solved by the Invention]

 However, in the above-mentioned conventional technique, both of the two independent transmissions 3 are arranged in parallel in the vehicle width direction so that the input pulley 6 to which the power of the prime mover is not brought into contact with each other. The sprocket 13 that gives rotation to the crawler 2 is widened between the sprockets 13, that is, the tread a is widened, and as a result, there is a problem in that it is not possible to make the most of the in-situ turning without using a small turning with a small radius.

Further, the crawler 2 having a wide tread a has a problem that the limit when traveling on a narrow road width is easily reached and the usability is deteriorated.

In addition, since the tread a of the crawler 2 is wide, there is a problem in that the external appearance of the entire carrier is poorly balanced and the aesthetic sense is inevitably deteriorated.

Further, since the tread a is different from that of the above-described mainstream transport vehicle capable of only gentle turning, the specifications of the same transport vehicle cannot be set, and it is not possible to make a series of models. Also occurs.

In order to solve the above-mentioned problems, the present invention shifts the positions of two independent transmissions so that they are not in contact with each other in a parallel state extending in the vehicle width direction, and the tread is compared with the conventional technique. It enables the installation of narrow left and right crawlers, which expands the limit of traveling on narrow road widths, and enables easy, swift and smooth direction changes even in narrow farmland by gentle turning or turning on the spot. An object of the present invention is to provide a traveling device for a transport vehicle that can be made into a series with a transport vehicle.

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, as means for solving the problems, in the invention according to claim 1, the left and right crawlers rotatably wound around the front and rear wheels of a transport vehicle, and the left and right crawlers to which the power of a prime mover is transmitted. It consists of two independent transmissions that control the rotation of the rear wheels to give a rotational force to each of the rear wheels at the same time or separately, and control them to rotate and stop in the forward and reverse directions in a continuously variable speed. The devices are arranged so that they do not come into contact with each other so that they do not touch each other in the width direction of the vehicle, and are displaced from each other in the front-rear direction. The distance between the front and rear wheels of the left crawler and the wheel of the front and rear wheels of the right crawler are arranged. It is different from the distance.

According to a second aspect of the present invention, in the first aspect of the present invention, the speed change device includes an input shaft provided with an input pulley that is rotationally input by power of a prime mover, and a rotary input to the input shaft. The hydraulic continuously variable transmission having an output shaft capable of rotating output by being given, the rotational output of the output shaft of this hydraulic continuously variable transmission is transmitted through the transmission gear, and the main shaft that rotates and the main shaft of this main shaft. And a gear transmission having an axle to which a sprocket corresponding to a rear wheel body that gives rotation to a crawler by axial rotation is fixed, and an axis of the axle of one gear transmission and an axle of an axle of the other gear transmission. The center of the vehicle shifts in the front-rear direction from the side-by-side direction that extends in the vehicle width direction, and the vehicle width is adjusted so that the input pulley of one hydraulic continuously variable transmission does not contact the input pulley of the other hydraulic continuously variable transmission. Orthogonal It will be in a substantially parallel state.

[0012]

[Embodiment of the Invention]

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1 and FIG. 2, for example, the traveling device 1 of the transport vehicle corresponds to the endless left and right crawlers 2a and 2b and the left crawler 2a and the right crawler 2b, respectively. The power transmission of the prime mover is transmitted, and the crawler 2 is composed of two independent transmission devices 3 that are controlled simultaneously or separately so as to rotate and stop in forward and backward directions in a continuously variable speed. . Mainly used for highland work vehicles for agriculture, which are used when managing and harvesting fruit trees that grow in high places of trees, and trucks for agriculture that carry harvested agricultural products such as vegetables and fruit trees. It is installed in agricultural vehicles.

The above-described transmission 3 is arranged in the transport vehicle in a state in which it is displaced in the front-rear direction from the side-by-side state in which it is generally oriented in the vehicle width direction. For example, as shown in detail in FIG. Input shaft 6 provided with a cooling fan 5 to which the power of is supplied via a transmission belt 4 and an input shaft 7 provided at the tip of the shaft, and an output capable of rotating output by giving a rotary input to this input shaft 7. A hydraulic continuously variable transmission 9 having a shaft 8; a sub-case 11 internally provided with a plurality of meshing transmission gears 10 for transmitting the rotational output of the output shaft 8 of the hydraulic continuously variable transmission 9 to the next machine; It has a main shaft 12 that rotates axially with the rotation of the transmission gear 10 in the sub case 11, and a sprocket 13 corresponding to a rear wheel body that transmits a rotational force from the main shaft 12 to rotate the crawler 2 is a shaft. The car provided earlier And a gear transmission 15 having a shaft 14.

In the transmission 3 having such a combination, for example, as the hydraulic continuously variable transmission 9, the control shaft 16 for switching the crawler 2 to rotate and stop in the forward direction and the reverse direction at a continuously variable speed is operated. At the same time, by rotating the input pulley 6 with the cooling fan 5 through the transmission belt 4 by the power of the prime mover to give the rotation input to the input shaft 7, the piston pump chamber in the upper part of the machine to the piston motor chamber in the lower part of the machine. The oil in the oil tank 17 circulates, and the circulating oil pressure causes the output shaft 8 of the piston motor chamber to rotate continuously in the forward and reverse directions in a continuously variable speed, or a stop can be obtained, such as an HST (hydraulic transmission). Is desirable.

The sub-case 11 rotates the internal transmission gear 10 connected to the output shaft 8 by the rotation output obtained from the output shaft 8 of the hydraulic continuously variable transmission 9 and at the same time transmits the transmission gear. It is desirable that a plurality of other transmission gears 10 meshing with the gear 10 also rotate at the same time, and that the main shaft 12 of the gear transmission 15 connected to a predetermined transmission gear 10 be rotated thereby.

The gear transmission 15 is provided with a side clutch portion 18, and the main shaft 12 is connected to a predetermined transmission gear 10 in the sub case 11 so that the transmission gear 10 rotates. And the rotational force of the main shaft 12 is transmitted to the axle 14 via the side clutch shaft and the transmission shaft to rotate the sprocket 13 corresponding to the rear wheel of the shaft tip, and at the same time, to the crawler 2. It is desirable to use something that gives rotation in the forward and reverse directions.

Next, regarding the arrangement of the transmission 3, the axial center of the axle 14 of the one gear transmission 15 and the axial center of the axle 14 of the other gear transmission 15 are arranged in a front-rear direction from a side-by-side direction extending in the vehicle width direction. And the one gear transmission 15 and the other hydraulic continuously variable transmission 9 are parallel to each other in the vehicle width direction, the input pulley 6 of one hydraulic continuously variable transmission 9 and The input pulley 6 of the hydraulic continuously variable transmission 9 is in a substantially parallel state so as not to contact the input pulley 6 in the direction orthogonal to the vehicle width. In such an arrangement, the tread a is narrower than in the conventional case, and the inter-wheel distance b between the front wheel body 19 of one of the crawlers 2 and the rear wheel body including the sprocket 13 is kept in a state where the axes of the front wheel bodies 19 are aligned. And the inter-wheel distance b between the front wheel body 19 of the other crawler 2 and the rear wheel body composed of the sprocket 13 is different, and the total lengths of both the left and right crawlers 2a, 2b are also different.

According to the traveling device 1 as described above, the tread a is narrowed as compared with the conventional one, the protrusion from both sides of the vehicle body is reduced, the appearance is balanced, the aesthetic appearance is remarkably improved, and the traveling device is narrow. The road width and the handling in the farmland are improved, making it easier to handle.

[0020]

[Effect of device]

 In the device according to the first aspect of the present invention, the tread can be narrowed by displacing the two independent transmissions from the parallel state facing the vehicle width direction. As a result, it is possible to easily, swiftly and smoothly change the direction even in a narrow farmland with a small radius, and to maximize the turning on the spot. And it can easily run on narrow roads. Also, by making the tread narrower, the crawler does not stick out from both sides of the car body, and the appearance is balanced and the appearance is significantly improved. Furthermore, since the size of the tread, which is the main type of transport vehicles that allows only gentle turning, can be set to the same size, the specifications of the same transport vehicle can be set and the series of models can be achieved.

According to the second aspect of the invention, in addition to the above effects, the transmission can be arranged optimally for narrowing the tread.

[Brief description of drawings]

FIG. 1 is a partially omitted plan view showing the outer appearance of an embodiment of the present invention.

FIG. 2 is a perspective view of FIG. 1;

FIG. 3 is an exploded perspective view of a transmission corresponding to the left crawler with a part thereof omitted.

FIG. 4 is a partially omitted plan view showing a conventional technique.

FIG. 5 is a partially omitted plan view showing another conventional technique.

FIG. 6 is a perspective view of FIG.

[Explanation of symbols]

 1 Traveling Device 2 Crawler 2a Left Crawler 2b Right Crawler 3 Transmission 6 Input Pulley 7 Input Shaft 8 Output Shaft 9 Hydraulic Continuously Variable Transmission 10 Transmission Gear 11 Subcase 12 Main Spindle 13 Sprocket 14 Axle 15 Gear Transmission 19 Front Wheel b Wheel Body distance

Claims (2)

[Scope of utility model registration request] 1. The left and right crawlers rotatably wound around the front and rear wheels of a carrier, and the respective rear wheels that give the rotational force to the left and right crawlers by transmitting the power of a prime mover. It consists of two independent transmissions that are controlled to rotate or stop in forward and backward directions simultaneously or separately by continuously variable transmissions. It is displaced and placed,
A traveling device for a carrier, wherein the distance between the front and rear wheels of the left crawler and the distance between the front and rear wheels of the right crawler are different. 2. The hydraulic continuously variable transmission having an input shaft provided with an input pulley that is rotationally input by the power of a prime mover, and an output shaft capable of rotational output when the rotational input is applied to the input shaft. The transmission, the main shaft that the rotational output of the output shaft of the hydraulic continuously variable transmission is transmitted through the transmission gear, and the sprocket that corresponds to the rear wheel that rotates the crawler by the rotation of the main shaft is fixed. And a gear transmission having a geared axle, the axial center of the axle of one gear transmission and the axial center of the axle of the other gear transmission are displaced from the front-rear direction in a parallel state toward the vehicle width direction,
2. The input pulley of one hydraulic continuously variable transmission and the input pulley of the other hydraulic continuously variable transmission are substantially parallel to each other in a direction orthogonal to the vehicle width so as not to come into contact with each other. A traveling device for a carrier.