JP2545653Y2 - Roller support structure for crawler running section - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel supporting structure for a crawler running section.

[0002]

2. Description of the Related Art Rollers for crawler guides of a crawler traveling section such as a combine are movable wheels that respond to irregularities on a traveling road surface, and the movable wheels are pivoted to a track frame via an equalizer-type swing arm. As supports, for example, those disclosed in Japanese Utility Model Laid-Open No. 1-149879 are known.

Since the movable wheels are located below the center of gravity of the traveling body in a horizontal state, the center of gravity of the movable wheels during traveling such as over a ridge is small and relatively gentle.

However, in the case of using the conventional equalizer type wheel supporting arm as described above, the swing arm has no restriction on the amount of rise and fall of the front movable wheel from the reference position. In particular, when the amount of downward movement of the front movable wheel is excessive or greater than the amount of upward movement, the following problem arises.

[0004] That is, at the crossing of a ridge or the end of an uphill, the front wheel largely falls according to the size and shape of the convex portion to be crossed immediately after the aircraft center of gravity crosses the ridge or the top of the uphill (therefore, the rear wheel is reduced). In order to support the weight of the fuselage (which greatly increases), there is a drawback that an unstable state or danger occurs such that the position of the center of gravity moves to the rear of the convex portion again. The present invention is to provide a wheel supporting structure that enables smooth and stable movement of the center of gravity at the end of climbing a hill or over a ridge as described above.

[0005]

The wheel supporting structure of the present invention which achieves the above-mentioned object has a movable rolling wheel 26, 27 for front and rear crawler ground guide, and a swing fulcrum 32 in the middle.
Crawler 22 with equalizer type swing arm 33 having
In mechanism provided on the inner peripheral position, provided with a front-friendly upset wheel 26 to the lower position of the aircraft center of gravity G, the upward swing amount H ₁ of the front track roller 26 to greater than the downward swing amount H ₂ rocking Regulator 3 for restricting swing of moving arm 33
8.39 is provided.

[0006]

When the crawler traveling unit 8 is traveling on a horizontal surface, the movable rolling wheels 26 and 27 are also in contact with the other rolling wheels in the crawler 22. It leans forward and leans forward or backward of the fuselage center line passing through the center of gravity G. At this time, the front movable wheel 26 swings upward when passing over the convex portion 26 of the road surface, and the rear movable wheel 27 descends. Conversely, when the rear movable wheel 27 passes through the convex portion 26, the rear movable wheel 27 rises and the front movable wheel 26 swings downward.

[0007] The front Allowed upset wheel 26 is restricted to the upper limit position of the raised by regulating unit 38, the lower limit position of the downward by the regulating unit 39 is regulated, the rise swing amount H ₁ relative descent swing amount H ₂ The large setting prevents the body from tilting due to the rearward movement of the center of gravity immediately after the protrusion 26 is passed.

[0008]

1 shows an embodiment of the present invention. FIG. 4 shows a body frame 1 having a pre-processing unit 2, a driver's seat 3, a threshing unit 4, and a straw processing unit 6, and a truck frame 7 below. FIG. 2 shows a side view of the combine with the crawler running unit 8 attached thereto via a dashed line.

As shown in FIG. 2, an auxiliary frame 9 is integrally provided below the body frame 1, and a drive arm 12 oscillated back and forth by a cylinder 11 fixed to the body frame 1. And elevating arms 16, 17 swinging back and forth in conjunction with the drive arm 12 via links 13, 14 are supported by the respective shafts. The lifting arm 1
The lower ends of the wheels 6 and 17 are pivotally supported by the track frame 7, and the operation of the cylinder 11 causes the track frame 7 to move up and down to adjust the vehicle height.

At the tip of the auxiliary frame 9, a bearing 19 is provided.
Axle 2 of a transmission (not shown) via
A drive wheel 23 for driving a crawler 22 is supported on the traveling shaft 21. First to fifth rolling wheels 24 to 28 each consisting of a pair of rolling wheels are supported on the outer surface side of the track frame 7 from the front, and an idler 29 that can move forward and backward is supported at the rear end. hand,
In the crawler 22, the crawler 22 is wound around the drive wheel 23, the idler 29, and the rolling wheels 24-28. An upper rolling wheel 31 is supported by the auxiliary frame 9 to prevent the crawler 22 from sagging on the upper side.

The first, second and fifth rolling wheels 24, 25 and 28 among the rolling wheels 24 to 28 are all fixed rolling wheels fixedly supported on the track frame 7. A third wheel (forward wheel) 26 and a fourth wheel (rear wheel) 27 are an equalizer-shaped F-shaped swing arm pivotally supported at an intermediate portion by a track frame 7 via a swing fulcrum shaft 32. 33 is supported at the front and rear ends via shafts 34 and 36.

As shown in FIG. 1, the swing arm 33 has a front arm 33a formed to be longer than a rear arm 33b, and the front and rear movable rollers 26, 27 are provided for the crawler 22 when the running road surface of the body has irregularities. In accordance with the deformation of the ground contact shape, the arms 33a, 33b move up and down with reciprocal swinging.

At this time, the front (movable) rolling wheel 26 rises by a large amount H _{1 in the} ascending direction and falls by a small amount H ₂ in the descending direction with reference to the rolling position (solid line state in FIG. 1) in the plane running state. as such, rear (movable) carrier rollers 27 is larger in the downward direction in the opposite, H _'2 only lowered to reduce the upward H' ₁
It is only configured to rise.

That is, the amount of elevation of each wheel is determined by the swing arm 3
3 is controlled by the rotation regulation in each rotation direction.
7), a restricting tool 38 composed of a bracket-shaped stopper that comes into contact with the projection 37 at a predetermined position in the rotation trajectory of the projection 37 projecting from the front end of the front arm 33. Is fixed. The restriction member 38 is attached so as to protrude from the side surface of the track frame 7 and
6 and the arm 33 also function as a stopper for preventing the upper wheel 31 from abutting.

The lowering of the front wheel 26 (the upper direction of the rear wheel 27) is controlled by a restricting tool such that the convex section 33c on the inner side of the front arm 33a contacts the lower arm. 39 is protruded from the outer surface of the track frame 7.

Reference numerals 41 and 42 denote fixed rolling wheels 24 and 25, respectively.
Between the movable wheel 27 and the fixed wheel 28 (the center of the crawler 22). In each of the guides 41 and 42, the bracket 4
3 is attached to the track frame 7.
Projections 44a of a core bar 44 embedded in the crawler 22 protrude from both sides of the guides 41 and 42, and slide into contact with the guides 41 and 42 to prevent the crawler from coming off.

The rear end of the guide 41 and the front end of the guide 42 are both curved so as to face the axial direction of the movable wheels 26 and 27 in the state of traveling on flat ground, so that the crawler can be prevented from coming off and the movable wheels can be raised. At the time of forward or backward travel, the core bar 44 or the crawler locking hole 22a is prevented from contacting the guide end.

The outer periphery of the lower portion of the front wheel 26 at the upper limit position is made substantially coincident with the extension of the rear end bottom surface of the front guide 41 to prevent the core bar 44 from contacting and abrading the guide when the wheel 26 is raised. Preventing.

Further, under the front and rear movable wheels 26 and 27, the lugs 22b protruding from the outer periphery on both sides of the crawler 22 or the lugs 22b so that the valleys between the lugs 22b alternately correspond to each other.
Is set, and the vibration applied to the equalizer arm 33 during traveling on the road surface is suppressed as much as possible.

In the case of over projection 46 of the ridge or the like as shown in FIG. 3 by the crawler support structure of the present invention constructed as described above, the aircraft center of gravity G of G ₁ and during horizontal running state of the front and rear protrusions 46 pass In the state of G ₈ , the load direction coincides with the fuselage center line O, but during that time, each of the rolling wheels runs from G ₂ when the first rolling wheel 24 rides to G ₇ when the idler 29 rides. It changes sequentially from hour to hour.

That is, the center of gravity G is substantially on the axis of the front movable rolling wheel 26 when the body is horizontal (the state of G ₁ , G ₈ ).
However, until the front movable wheel 26 rises and passes over the convex portion 46, the direction of the load from the center of gravity G is from the body center line O as shown by G ₂ and G ₃ because the body is tilted backward. Behind. The track roller 26 is raised and tilted forward fuselage from the time of performing ridge beyond the like, the direction of the gravity acting on the center G of gravity, G ₄ ~
Acting in front of the fuselage center line O as shown in G _7.

[0022] That aircraft gently inclined forward at the moment when in the process of passing over ridges 46 horizontal, movable track roller 26 under the rear tilt et gravity G is such beyond ridge rising, while G ₄ ~G ₇ together keep leaning forward in restores horizontally G _8, and the center of gravity moving very slowly, as shown as a whole, hardly be other longitudinal傾重or vibration in the middle.

[0023]

[Effects of the Invention] According to the present invention configured as described above, the weight center of gravity is relatively small due to the large rise of the front wheel when the aircraft is running over a ridge or when the aircraft is loaded. When the rear wheel crosses the top of a ridge, etc., the amount of vibration of the rear wheel is small, so the tilting of the center of gravity to the rear can be prevented or alleviated. There is an effect that danger due to the movement of the center of gravity or the back-and-forth movement is prevented.

[Brief description of the drawings]

FIG. 1 is an enlarged side view of a main part of a wheel supporting structure.

FIG. 2 is an overall side view of a combine traveling unit.

FIG. 3 is an overall side view showing the movement of the center of gravity when the combine traveling unit crosses a ridge.

[Explanation of symbols]

1 body frame 8 crawler drive unit 22 crawler 26,27 Allowed upset annulus 32 fulcrum 33 swinging arm 38.39 regulating unit G body centroid H _1, H ₂ track roller swing amount

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshihiko Takakado 667 Iida-cho, Iza-cho, Higashi-Izumo-cho, Yatsuka-gun, Shimane Prefecture Mitsubishi Agricultural Machinery Co., Ltd.

Claims (1)

(57) [Scope of request for utility model registration] A movable roller (26), (27) for crawler ground guide is pivotally supported at the front and back, and a swing fulcrum (32) is provided in the middle.
In a mechanism provided with an equalizer-type swing arm (33) having an inner peripheral position at the inner peripheral position of the crawler (22), the front movable roller (26) is provided at a position below the machine center of gravity (G), and the forward roller (26) is provided. upward swing amount _{(H 1)} a downward swing amount (H ₂₎ regulating portion for regulating the swing of the as is to increase the swing arm (33)) of (38), (39)
Roller support structure of crawler running part provided with.