JPH04101779U - Crawler removal prevention guide - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] The purpose of the present invention is to make the crawler guide run smoothly when crossing ridges, etc., and to reduce running resistance. [Configuration] One crawler removal prevention guide 22 is inserted between a large number of guide wheels and attached to the track frame 4,
The guide 22 is curved and floated upward between the adjacent wheels 17 to 19, and the amount of curvature of the guide 22 between the wheels 17 and 18 approximately below the center of the fuselage 1 is made larger than at other positions, and the clearance angle at the forward position is Make θ ₃ larger than the approach angle θ ₄ at the rear position.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is a guide to prevent crawlers from coming off in crawler vehicles such as combine harvesters. Regarding.

0002

[Conventional technology]

Conventional crawler release prevention guides include, for example, Utility Model Application No. 60-85280, Utility Model Application No. Core bar protrusions that protrude in two rows on the inner circumference of a single crawler, such as No. 159583/1983 A guide to prevent the crawler from coming off is installed between the ground contact wheels that contact the inner peripheral surfaces on both sides. It is well known to be inserted in the front and back direction and supported on the truck frame, and furthermore, the It is also known that the guide is curved upward between the wheels.

0003

[Problem that the idea aims to solve]

In general, a guide to prevent crawlers from coming off is one guide for all several rollers. If it is inserted, the removal prevention performance will be more stable and installation and removal will be easier, but the running resistance will be lower. If the resistance becomes excessive and working power is also required, such as with a combine harvester, the rotating Due to the excessive resistance at the time, the load on the work equipment is also increased, resulting in power loss and engine stalling. There was a problem.

0004 In addition, the weight of the aircraft is greatest when going over a convex part, such as when driving over a ridge. Near the center of the aircraft, the crawler slides into contact with the guide to prevent it from coming off, allowing it to cross over the ridges smoothly. Moreover, there are problems such as excessive running resistance.

[0005]

[Means to solve the problem]

The crawler detachment prevention guide of the present invention that solves the above-mentioned problems includes a plurality of wheels 16 to 19 rolling in two rows on the left and right on the ground contact side of the inner circumferential surface of the crawler 14; - 19, and a single guide 22 that is inserted in the front-rear direction between the wheels 16 to 19 in each row to prevent the crawlers from coming off. In between, the bottom surface of the guide 22 is curved so as to float upward, and the curved height of the guide 22 at the adjacent interval approximately in the center of the wheel is made higher than the others, and the relief angle θ ₃ at the front position is increased. It is characterized by a small approach angle θ ₄ at the rear position.

[0006]

[Effect]

The wheels 16 to 19 are pivotally supported by the track frame 4 and roll into contact with the inner periphery of the crawler 14 on the ground contact side, and the crawler guide 22 is located at the center of the inner periphery of the crawler 14 to prevent the crawler from coming off during traveling. Between the adjacent wheels, there is little running resistance because the wheels float upward in a curved manner, and especially between the wheels near the center of the aircraft, the amount of curved levitation is large, and the approach angle θ ₄ is larger than the clearance angle θ ₃ of the curve. , even when turning, there is little running resistance and stable and smooth running over ridges is possible.

[0007]

【Example】

To explain in detail the embodiments shown below, the drawings show how the crawlers and guides are installed. Below the fuselage frame 1, the left and right arms are connected via the front and rear arm frames 2 and 3. A track frame 4 is integrally fixed, and the arm frames 2 and 3 are It is inserted between two symmetrical side plates 2a and 3a, both of which form left and right bifurcations. , peripheral plates 2b and 3b welded from both left and right sides so as to cover the lower outer periphery, and a bottom inclined part. It has thick reinforcing plates 2c and 3c that are inserted between the oblique parts and welded together, and the side plate 2a , 3a so as to sandwich the horizontal beams 1a and 1b of the frame 1. The body is welded.

[0008] L-shaped reinforcing metal fittings 2d are attached to the front of the frame 1 on both sides of the front arm frame 2. It is integrally welded to support the horizontal beam 1a. Arm frame 2 and 3 By configuring the parts in this way, processing accuracy and strength are improved.

[0009] A transmission 6 is attached to the front of the aircraft frame 1. A drive wheel 8 is fitted onto a running shaft 7 that protrudes to the side of the cushion 6. . The protruding end of the running shaft 7 is connected to the track frame 4 whose front end is curved like a sled. The bearing 9 of the running shaft 7 is fixed to the tip of the truck frame. It is detachably bolted to the bearing bracket 11.

0010 At the rear end of the track frame 4, there is a bolt that expands and contracts according to the crawler length. An idler 13 is pivotally supported via a hinge type adjuster 12, and a crawler 14 is It is wound between the brake wheel 8 and the idler 13. and track friend On the bottom side of the arm 4, there are four front and rear wheels 16 to 19, which form a pair for each shaft. It is pivotally supported via the bearing 21, and is inscribed on both sides of the core protrusion 15 of the crawler 14. 14 to the ground.

[0011] The core protrusions 15 are protruded in two rows in pairs on the left and right at a constant pitch, Between the rows of the core protrusions 15 and between the wheels of each shaft, there are bar-shaped rods in the front and back direction to prevent the crawler from coming off. A mounting arm protruding outward from the track frame 4 through which a guide 22 for the 23 and to the truck frame 4 via a bracket 24 fixed to the guide 22. It is detachably attached. Between the bottom of the guide 22 and the inner circumference of the crawler 14 A small gap is formed.

The front end of the guide 22 extends forward of the shaft passing under the shaft of the first rolling wheel 16 and is curved upward so as to fit approximately within the outer diameter of the first rolling wheel 16. θ ₁ is formed to be larger than the crawler approach angle θ ₂ of the crawler 14, and this structure prevents damage to the core metal due to the tip of the guide 22 being locked in the drive wheel engagement hole (not shown) at the center of the crawler during running. is prevented, and running resistance to the core metal is also reduced.

The bottom surface of the guide 22 floats upward as much as possible between adjacent rollers to reduce running resistance due to contact with the crawler 14, and conversely, at the roller position where the crawler comes off, the bottom surface floats upward as much as possible on the inner periphery of the crawler contact side. configured to be close to each other. In particular, between the second and third wheels 17 and 18 near the center of gravity of the aircraft, the guide 22 has the lengths L ₁ and L ₂ of the front and rear sloped portions such that L ₁ <L ₂ and the front escape distance. θ ₃ and the rear approach angle θ ₄ are set to θ ₃ > θ ₄ , and the amount of curvature is made large and high to facilitate passing near the center of gravity of the aircraft and getting over the rear when going over a convex part such as when running over a ridge. This mechanism is designed to reduce as much as possible the running resistance caused by the contact between the guide 22 and the crawler at the center of the aircraft when the aircraft is rotating.

[0014] Also, at the rear of the driver's seat on the fuselage frame 1 of the combine, the threshed paddy is received. A paddy receiving floor 28 is provided, but on the outside there is a space for loading paddy bags and a space during work. The vertically elongated auxiliary floor 26 serves as a boarding and alighting deck, and can be freely folded and retracted around a fulcrum 27. installed. The auxiliary floor 26 is placed on the side of the driver's seat of the machine during reaping work. When there are uncut grain culms or obstacles, run in the upright and retracted state as shown by the solid line in Figure 3. However, at this time, a gap a is formed between the outer surface of the frame 1 and the auxiliary floor 26, When paddy is stored in this gap with a paddy bag inserted, the end of the bag becomes locked and the paddy is It becomes impossible to remove the paddy bag without draining it from the bag or cutting it, resulting in continuous reaping. Work becomes impossible.

[0015] Therefore, as shown in FIG. In order to alleviate the difference, a plate-shaped cover 29 with the inner end bent downward is installed on the aircraft. It is attached to frame 1 with screws.

[0016]

[Effect of the idea]

Since the present invention is constructed as described above, each crawler separation prevention guide is made into one. In addition to simplifying the mechanism and reducing costs, the crawler is placed at a higher distance between adjacent rollers. Because it is formed so that it floats in the opposite direction, there is less resistance due to contact friction when running or turning. In addition to preventing an increase in In addition to increasing the clearance angle, it also increases the clearance angle and reduces the approach angle, making it easier to run over ridges. The front and back of the crawler contact area where crawling can be done easily and safely, and where the crawler is likely to come off. This has advantages such as not impairing the function of preventing displacement.

[Brief explanation of drawings]

FIG. 1 is a side view of a main part of a crawler traveling section of a combine harvester.

FIG. 2 is a front view of the front half of the combine harvester's body frame.

FIG. 3 is a sectional view of the rear half of the combine harvester's body frame.

[Explanation of symbols]

1 Aircraft frame 4 Track frame 14 Crawlers 17 to 19 Rolling wheels 22 Guide θ ₁ Curvature angle θ ₂ Crawler approach angle θ ₃ Relief angle θ ₄ Approach angle

Claims (1)

[Scope of utility model registration request] Claim 1: A plurality of rolling wheels (16) to (1) rolling in two rows on the left and right on the ground contact side of the inner circumferential surface of the crawler (14).
9), a track frame (4) that pivotally supports the wheels (16) to (19), and wheels (16) to (19) in each row of the above.
In a structure having a single guide (22) inserted between the front and back directions to prevent the crawler from coming off, the bottom surface of the guide (22) is curved so as to float upward between adjacent front and rear wheels. , the curved height of the guide (22) in the adjacent interval at the approximate center of the wheel is made higher than the others, and the relief angle (θ ₃ ) at the front position is made large and the approach angle (θ ₄ ) at the rear position is made small. Guide to prevent crawler from coming off.