JPH0640066Y2 - Traveling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a traveling device, and can be used for a traveling device of a mobile agricultural machine such as a combine harvester.

[Prior art]

Conventionally, in general, in a traveling device of this type, if this is a combine, for example, in the case of splitting work or ridge work, etc., or trampling the uncut stem culm by a traveling crawler that is on the side of the cut land in normal work, In order to avoid riding on a ridge, a traveling crawler on the side of the cut land can be moved in parallel to the other traveling crawler, for example, as disclosed in Japanese Utility Model Laid-Open No. 57-189988.

[Problems to be Solved by the Invention] However, in such a conventional traveling device, the outer end portion of the slide frame integrated with the frame supporting the traveling crawler is extended to a position above the traveling crawler and the body is Since the frame is not configured to be supported, therefore, when the weight of the machine body is applied to the support frame, a bending load acts on the frame slide portion, and there is a problem that a smooth slide operation cannot be performed.

The present invention has taken the following technical means for the purpose of solving such problems.

[Means for Solving the Problems]

That is, according to the technical means of the present invention, the mounting base 19 for mounting and supporting the vehicle body is provided on the left and right traveling frames 22 to which the traveling crawler 2 is attached, and the traveling frame 22 is configured to be movable left and right with respect to the mounting base 19. The slide parts 11a and 12a for accommodating the slide frame 3a are provided below the horizontal frames 11 and 12 horizontally provided in the mounting table 19, and one crawler 2 is provided below the slide frame 3a. Support legs to support
The outer periphery of the wheel pipe 36 is provided with 17 and is configured to support the mounting table 19 above the crawler 2 by the outwardly extending end of the slide frame 3a, and which also houses the transmission shaft 5 fixed to the transmission case 4 side. A bearing body 7 for holding the drive sprocket 6 is externally fitted and held so as to be movable in the left and right directions. The slide frame 3a is brought into contact with the lower surfaces of the horizontal frames 11 and 12 and rolls as the slide frame 3a moves. It is characterized in that it is configured so that the traveling crawler 2 is slid by the hydraulic cylinder 18 while the rolling wheel 15 is provided.

[Action]

The slide frame 3a is accommodated in the slide portions 11a and 12a in the horizontal frames 11 and 12 of the mounting table 19 and slides in the left-right direction.

The support legs 17 connect the slide frame 3a and the traveling frame 22 of the traveling crawler 2 and transmit the load applied to the sliding frame 3a to the traveling crawler 2. The slide frame 3a extends to the outside of the support leg 17 and is located above the traveling crawler 2. With such a configuration, the weight of the machine body is added to the crawler 2 from directly above the traveling crawler 2.

Further, the drive sprocket 6 for the traveling crawler and the bearing body 7 for holding the drive sprocket 6 slide in the left-right direction while being fitted and held on the outer periphery of the wheel pipe 36 on the fixed side.

By disposing the rolling wheels 15 on the slide frame 3a and rolling inside the horizontal frames 11 and 12 in front of and behind the traveling device, compared to the case of sliding by sliding on the sliding contact surface, light load is reasonable. Smooth slides can be obtained.

[Effect of device]

Since the present invention is configured and operates as described above, since the load applied to the body frame is applied from above the traveling crawler via the slide frame and the supporting leg, the bending load is applied to the slide frame of the movable traveling crawler. Therefore, the slide frame can slide smoothly in the horizontal frame.

The movable-side bearing body that holds the drive sprocket for the traveling crawler is a structure in which it is externally fitted and held on the outer circumference of the fixed-side wheel pipe. It is possible to maintain a sufficient strength and obtain a stable support structure.

By arranging the rolling wheels on the slide frame and rolling them inside the horizontal frame, it is possible to smoothly and smoothly slide with a light load, compared with the case of sliding by sliding on the sliding contact surface. Can be done reliably and lightly.

〔Example〕

In the illustrated example, the traveling frame 1 is a so-called lip-groove type steel plate in the front-rear direction with respect to the fixed frame member 10 in the front-rear direction (a) in which the support device 8 of the fixed-side crawler 2 is mounted by the support legs 9. A horizontal frame 11 and a horizontal frame 12 each having a cross-section are provided with the cross-section openings facing downward, and the projecting end sides are connected from the upper side in the front-rear direction (a).
13 is provided to form a rectangular frame.

Front and rear lateral members of the slide frame 3 formed in a rectangular shape
A plurality of rotatable wheels 15 provided on 3a, 3a are fitted into the front and rear lateral frames 11, 12, and lip portions 16 on both sides sandwiching the opening are provided on the rails of the wheel 15. As a structure, the slide frame 3a is slid laterally,
The movable crawler 2 is connected and fixed to the support leg 17 protruding downward from the slide frame 3a through the lower openings of the front and rear horizontal frames 11 and 12. A frame of a mounting table 19 on which a mounted object is mounted is formed and provided above these.

Further, hydraulic cylinders 18, 18 are stretched between the slide frame 3 and the fixed frame member 10 of the traveling device 1.

By extending the outer end 3e of the slide frame 3a to a position above the crawler 2, the weight of the machine body is added to the crawler 2 from directly above the traveling crawler 2.

The crawler belt 14 of the crawler 2 is an endless rubber crawler belt, provided with a lug 20 on the outer peripheral surface, and when wound around the left and right crawlers 2, 2, the crawler is provided on the inner surface inward of the center of the crawler width (d). A meshing body 21 that meshes with a drive sprocket 6 that drives and rotates 2 is continuously provided along the rotation direction.

The crawler support device 8 has a plurality of (four in the illustrated example) drums outwardly of each crawler 2 at appropriate intervals in the front-rear direction (a) of the traveling frame 22 along the front-rear direction (a) formed by a rectangular tube. -Shaped rolling wheel 23 is rotatably pivoted, and a rear wheel 25 is attached to an arm 24 that is adjustable into and out of the traveling frame 22 by being fitted into the traveling frame 22 at the rear end.
The crawler belt 14 is wound around the crawler 2 by tensioning the crawler 2. The support device 8 of the fixed side crawler 2 of this structure is connected and fixed to the traveling frame 22 by the pair of front and rear supporting legs 9 of the traveling frame 1, and the sliding side crawler 2 is attached to the supporting leg 17 of the slide frame 3a.
22 is connected and fixed.

The traveling transmission case 4 is internally equipped with a transmission mechanism having a speed change gear, a clutch, etc. for transmitting the power from the prime mover to the transmission shaft 5, and is mounted on the front edge portion 26 of the mounting base 19 and fixed to the crawler. To the side of the support device 8, a drive sprocket 28 is provided at the end of a transmission shaft fitted with a wheel pipe 27 to drive the crawler 2, and the wheel pipe 27 is supported by the traveling frame 22 by support legs 29. Further, the transmission shaft 5 that is transmitted to the sliding crawler 2 is provided on the other side so as to project.

The transmission shaft 5 is screwed to the end of the shaft 31 with a screw 32 with a space provided between the center shaft 31 bearing the final transmission gear 30 in the transmission case 4 and the outer peripheral surface thereof. Worn boss
A cylindrical foil pipe 36 having an outer cylinder shaft 35 in which a spline 34 is provided on the outer peripheral surface of a cylinder having 33, and in which the inner end is fixedly supported by the transmission case 4 within the space.
The wheel pipe 36 rotatably supports the central shaft 31 with a bearing 37, and also rotatably supports the outer cylinder shaft 35 with a bearing 38. The shaft 31 is configured to be reinforced and supported.

A wide boss portion 39 of the drive sprocket 6 having an inner hole provided with a spline to be fitted from the outside is provided on the spline 34 of the outer cylinder shaft 35 of the transmission shaft 5 and the boss portion 39 is used as a bearing.
The leg portion of the bearing body 7 having a housing portion 41 received from the outside at 40 extends over the rolling wheel 23 and the crawler support device 8
Is fixed to the front end of the traveling frame 22 to also support the transmission shaft 5, and the bearing body 7 and the drive sprocket 6 are positioned such that their relative positions are located outside the housing sprocket 6 in the sliding direction. Stop rings 42 and 43 are provided on the left and right sides of the bearing 40 to prevent the bearing from coming off, and the drive sprocket 6 is moved in the direction of the shaft 5 while the drive sprocket 6 is being rotated by the transmission shaft 5 along with the movement of the bearing body 7.

Left and right drive from a transmission case 4 that is appropriately transmitted from a prime mover mounted on a mounting table 19 on the traveling frame 1 via a central shaft 31, an outer cylinder shaft 35, and a transmission shaft of a fixed side crawler 2. When the sprocket wheels 28 and 6 drive and rotate the crawler belts 14 of the left and right crawlers 2 and the traveling device moves forward, when the hydraulic cylinders 18 and 18 are extended by the hydraulic circuit, the movable side crawlers 2 move laterally. To do. At this time, the wheel 23
The bearing body 7 rotates the drive sprocket 6 by the sliding movement of the traveling frame 22 having the above, and integrally moves with the bearing sprocket 6 in the laterally outward direction along the transmission shaft 5, and the traveling crawler 2 drives the crawler belt 14. While rotating, move laterally to expand the space between the left and right crawlers 2,2,
The slide can be stopped at the position where the extension of is stopped to change the left-right weight balance of the mounted object on the mounting base 19. At this time, the housing portion 41 of the bearing body 7 of the slid crawler 2 bears the transmission shaft 5 in the vicinity of the projecting end of the transmission shaft 5, the drive sprocket 6 is adjacent to the inside thereof, and the plurality of hourglass-shaped rolling wheels 23 Is located on the line in the front-rear direction (a) in the vicinity of the center of the width, and meshes with the meshing body 21 of the crawler belt 14 that rotates to rotate, but the housing portion 41 is outside the drive sprocket 6 and the transmission shaft 5 Accordingly, the transmission shaft 5 can be safely supported against bending load.

Further, as shown in the figure, by disposing the rolling wheels 15 on the slide frame 3a and rolling inside the horizontal frames 11 and 12 in front of and behind the traveling device, it is lighter than the case of sliding by sliding on the sliding contact surface. It is possible to slide the hydraulic cylinders 18 with ease under load.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a plan view, FIG. 2 is a front sectional view thereof, FIG. 3 is a partially enlarged side sectional view thereof, and FIG. FIG. 5 is an enlarged front sectional view of FIG. In the figure, reference numeral 1 is a traveling frame, 2 is a traveling crawler, 3 is a slide frame, 4 is a transmission case, 5 is a transmission shaft, 6 is a drive sprocket, 7 is a bearing body, 11 and 12 are lateral frames, 1
5 is a wheel, 17 is a support leg, 18 is a hydraulic cylinder, 19 is a mounting base, 22 is a traveling frame, and 36 is a wheel pipe.

Claims (1)

[Scope of utility model registration request] 1. A mounting base 19 for mounting and supporting an airframe is provided on the left and right traveling frames 22 to which the traveling crawler 2 is attached, and the traveling frame 22 is configured to be movable left and right with respect to the mounting base 19. Slide portions 11a and 12a for accommodating the slide frame 3a are provided on the lower side of the horizontal frames 11 and 12 that are laterally installed in the base, and supporting legs that support one crawler 2 are provided on the lower side of the slide frame 3a. 17 is provided so that the mounting base 19 is supported above the crawler 2 by the outwardly extending end of the slide frame 3a, and on the outer circumference of the wheel pipe 36 fixed to the transmission case 4 side and having the transmission shaft 5 incorporated therein. Is provided with a bearing body 7 which holds the drive sprocket 6 as a bearing so as to be externally fitted and held so as to be movable in the left and right directions.
3a is provided with a rolling wheel 15 that is brought into contact with the lower surfaces of the horizontal frames 11 and 12 and rolls as the slide frame 3a moves, and is configured to slide the traveling crawler 2 by a hydraulic cylinder 18. Traveling device.