JPH107040A - Movable rolling wheel mounting structure of crawler traveling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a long supporting arm for fitting a movable rolling wheel by fitting the movable rolling wheel provided in the vicinity of the position of center of gravity of a vehicle body among a plurality of lower rolling wheels to a traveling frame fitting part to which a rear end of a crawler detachment preventive guide is fitted through the supporting arm in a vertically turnable manner. SOLUTION: Each rolling wheel is pivotably supported in a freely turnably manner by each supporting shall projected from a traveling frame 11 to the side. A fitting part 90 to which a rear leg part 72 of a forward crawler detachment preventive guide 71 is also used as a fitting member to support a rolling wheel 9 in an oscillating manner. A fitting cylinder 93 having a supporting arm 92 of the rolling wheel 9 is formed on a fitting shaft capable of being turnbly fitted, a spring 96 is fitted to and inserted in the fitting cylinder 93 to energize the rolling wheel 9 downward, and the rolling wheel 9 is arranged in the vicinity of the position of the center of gravity of a vehicle body in a relatively extensive space part between lower rolling wheels 13a, 13b. In the rolling wheel 9, the supporting arm 92 can be formed as long as possible, and can be smoothly turned in a vertically oscillating manner as the crawler is moved vertically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a movable rolling wheel in a crawler traveling device provided in a combine or the like.

[0002]

2. Description of the Related Art In general, a crawler traveling device guides an inner peripheral surface of a crawler, which is stretched over driving wheels and idler wheels, on a ground contact side by a plurality of lower rolling wheels arranged outside a traveling frame. It is configured to guide the cored bar guide attached to the traveling frame into the cored bar projection of the crawler, but if all of the lower rolling wheels are fixed, they can be used when riding over a ridge or using a road plate. There is a drawback in that, for example, when a truck is stacked, a large impact is applied to the stepped portion in a so-called seesaw shape while the vehicle is largely tilted back and forth to get over.

In view of the above, the lower rolling wheel, which is provided in the vicinity of the machine center of gravity, of the plurality of lower rolling wheels is mounted on a mounting shaft projecting laterally from the running frame via a support arm so as to be vertically rotatable. When the device gets over a ridge or a step, the above movable wheel can move up and over it smoothly, and it can be used even if the ground contact part of the crawler is curved upward like this. There is known a crawler traveling device in which a driving wheel is joined to a core metal projection of a crawler to prevent the crawler from coming off.

[0004]

However, in this kind of conventional crawler traveling device, a mounting portion for attaching a movable rolling wheel is separately provided on a traveling frame, so that a comparative example allowing vertical rotation of the movable rolling wheel is provided. A wide space must be secured between the front and rear lower wheels, and if a wide space is provided between the front and rear lower wheels, a compact traveling device can be constructed. This means that the number of lower rollers that cause the crawler to receive the machine body load must be reduced.In this case, the supporting load of the lower roller for each one increases, and the crawler also moves the lower rollers and the lower rollers. Between the lower and upper and lower rolling wheels to reduce the gap between the front and rear lower rolling wheels and the movable rolling wheels. Ensure smooth up and down movement of movable wheels There is a problem that the door can not be.

More specifically, if the front and rear lower wheels are provided close to the movable wheels in order to prevent the crawler from coming off, based on the displacement in the front-rear direction when the movable wheels rotate up and down,
In particular, when the movable wheel is moved upward, there is a fear that it comes into contact with the lower rear wheel, and if the mounting portion of the movable wheel is mounted shifted forward, it faces between the metal core projections of the crawler. This interferes with the mounting portion of one of the crawler separation prevention guides for preventing the crawler from being separated, which causes a problem that the crawler cannot be mounted on the traveling frame.

If the movable wheels are particularly moved upward by a stopper or the like in order to prevent the movable wheels from contacting the lower wheels, the up-and-down movement amount of the movable wheels is reduced and the levee is smoothly moved. In other words, there is a problem contrary to the original purpose of providing the movable rolling wheel, in which the movable wheel cannot be overcome.
Similarly, if the support arm of the movable rolling wheel is shortened to prevent interference between the movable rolling wheel and the mounting portion of the crawler detachment prevention guide,
The mounting angle of the support arm at the time of moving the movable wheel is steeply inclined, while at the time of moving the movable wheel, the movable wheel is displaced in the front-rear direction, so contact with the movable wheel cannot be avoided. In addition, there arises a problem that it is difficult to secure a vertical movement amount of the movable rolling wheel.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, a movable rolling wheel mounting structure of a crawler traveling device according to the present invention suspends a crawler over a driving wheel and an idle wheel, and A crawler traveling device that guides the inner peripheral surface on the ground side with a plurality of lower rolling wheels attached to a traveling frame and faces a crawler detachment prevention guide between core metal projections of the crawler to prevent the crawler from coming off. A movable rolling wheel provided in the vicinity of the machine center of gravity of the lower rolling wheel is vertically rotatably mounted to a mounting portion of a traveling frame to which a rear end of the crawler disengagement prevention guide is mounted via a support arm.

[0008] The mounting portion of the crawler disengagement prevention guide may be a mounting shaft extending from the traveling frame.
The movable rolling wheel is vertically rotatably mounted by rotatably fitting a mounting cylinder having a support arm to the mounting shaft.

[0009]

An embodiment of the present invention will be described with reference to the drawings. A is a crawler traveling device 1 according to the present invention.
Is mounted on the left and right sides of the traveling body 2, and by a similar arrangement to the conventional one on the traveling body 2, a cutting unit 3 for cutting planted grain culms from the front is supported so as to be able to move up and down and at the rear. A threshing unit 5 is mounted, and a control unit 6 and a Glen tank 5a are installed on the other side.

As shown in FIG. 2, the cutting section 3 has cutting blades 30, 30 of a double operation type.
Is connected to a drive side crank drive mechanism 33 via a connecting rod 35 so that the upper and lower cutting blades 30,
30 is configured to reciprocate in the reverse direction. The connecting rod 35 is provided with a screw cylinder 36 at the screw portion formed at each end thereof.
a and a metal 36b are attached by screwing the screw cylinder 36a. The operating members 36 on both sides include a bifurcated joint 37 that supports the metal 36b on the operating arm 32 and a crank drive mechanism 3
3 is attached to the bifurcated joint 37a via connection pins 38, 38.

[0011] As shown in FIG.
Oiling hole 3 drilled in screw cylinder 36a in the above connected state
6c through a lubrication hole 36d drilled in the metal 36b,
The lubricating oil can be supplied to the connecting pin 38 so as to perform smooth transmission. The screw cylinder 36a has a concave groove 36e having a semicircular cross section on the outer periphery of the lubrication hole 36c, and a resilient ring 39 made of rubber or plastic having a circular cross section is detachably attached to the concave groove 36e. Has been fitted. Thus, the lubrication hole 36c is closed in an oil-tight manner by the ring 39 to prevent the leakage of the lubricating oil and the intrusion of the muddy water, and the lubrication released by moving the ring 39 as shown by the dotted line in FIG. Lubricating oil can be easily supplied from the hole 3c.

Next, the configuration of the crawler traveling device 1 will be described with reference to FIG. The crawler traveling device 1 is a state in which a crawler 7 formed endlessly of a rubbery elastic material is stretched between a driving wheel 10 that is driven and rotated by engine power and a floating wheel 12 whose position can be adjusted in the front-rear direction on a traveling frame 11. The inner peripheral surface on the ground side is provided with a plurality of lower wheels 13 and the lower wheels 13.
·································································································································· About the upper inner peripheral surface is supported by the upper rolling wheel 15 at a substantially central portion of the front and rear length.

The above-mentioned rolling wheels 13, 15, and 9 straddle both outer sides of a bifurcated core metal projection 70 protruding from the inner central portion of the crawler 7, and are in a so-called double-flange type in which they are in rolling contact with the inner peripheral surface of the crawler 7. The traveling frame 11
The shaft is rotatably supported by each support shaft projecting sideways from the shaft. A rod-shaped core having an appropriate number of legs 72 and being formed in a sled shape with its front and rear ends facing upward between the adjacent lower rolling wheels 13 on the front side and the rear side of the traveling frame 11. A metal guide 71 (crawler detachment prevention guide) is slidably fitted into the core metal projections 70, 70 so that the crawler 7
To prevent it from coming off.

The core metal guide 71 has its legs 72 detachably attached to the end of an attachment portion 90 projecting laterally from the running frame 11 with attachment screws 91, so that the pair of lower rolling wheels 13 can be formed. , 13. The leg 7 behind the cored bar guide 71 located on the front side
The mounting portion 90 to which the second wheel 2 is attached is configured to also serve as a mounting member for supporting the movable roller 9 so as to swing as shown in FIG.

That is, the mounting portion 90 is formed on a mounting shaft for rotatably inserting a mounting cylinder 93 having a support arm 92 for the movable wheel 9, and a movable wheel is attached to an end of the support arm 92. The mounting arm 9b protruding from the boss 9a of the mounting member 9 is detachably mounted by a mounting screw 95, and a coil-shaped spring (spring member) 96 is inserted into the mounting cylinder 93, and one end thereof is locked to the traveling frame 11. In this state, the other end is locked to the support arm 92 so as to urge the movable roller 9 downward about the mounting portion 90.

In this downwardly biased support state, the movable rolling wheels 9
Is a support arm 9 extending obliquely rearward from the mounting portion 90.
2, a relatively wide space formed between the adjacent lower front wheel 13 a and rear lower wheel 13 b is disposed in the vicinity of the longitudinal center of gravity of the aircraft. Therefore, the movable roller 9 can form the support arm 92 as long as possible without causing interference with the rear lower roller 13b. The mounting part 90
And has a downward urging force, and can smoothly swing up and down with the up and down movement of the crawler 7 along the unevenness of the ground and the step portion along the locus indicated by the dotted line in FIG.

The rear lower rolling wheel 13b is formed to have a slightly smaller diameter than the other lower rolling wheels 13 so that the upper portion of the lower rolling wheel 13b is formed in a space formed between the lower rolling wheel 13b and the turning locus of the movable rolling wheel 9. The rollers 15 are arranged close to each other so as to prevent contact with each other, so that the center of the upper portion of the crawler 7 can be stably guided and supported at an appropriate supporting height.

The movable roller 9 of the crawler traveling device having the above-described structure allows the mounting portion 90 of the cored bar guide 71 located on the front side of the movable roller 9 to also serve as a mounting shaft of the movable roller 9. A lower wheel 13 provided adjacent to the rear side of the movable wheel 9
b is formed to be smaller in diameter than the other lower rolling wheels 13, so that the front and rear narrow lower rolling wheels 13 a and 13 b
The movable rolling wheel 9 is supported by forming the mounting angle of the support arm 92 gently with a simple configuration in which the number of parts is reduced, and the vertical turning margin is increased while preventing contact with other rolling wheels. As a result, it is possible to smoothly move the movable rolling wheel 9 upward and downward at the unevenness of the ground and at the step portion, so that the traveling can be favorably performed.

That is, the crawler traveling device 1 causes the crawler 7 to move due to the resistance of the protruding portion when the unevenness of the ground or the convex portion such as the earth mass or stone reaches the movable roller 9 of the crawler 7 as the combine A travels. The movable rolling wheel 9 moves upwardly around the mounting portion 90 against the spring 96 via the center, and the central portion in the front-rear direction of the crawler 7 is bent upward, so that the convex portion can be smoothly passed over. In addition, it is possible to satisfactorily perform traveling in which rolling in which the body tilts left and right and damping in which the body tilts forward and backward are prevented.

Further, when the vehicle runs over a large step portion when a truck is loaded by using a ridge or a road board, the movable rolling wheel 9 provided with the long support arm 92 at a gentle mounting angle is provided with the movable wheel 9. The movable rolling wheel 9 can be largely retracted upward along the moving trajectory, and can also be moved downward by the crawler 7 when climbing over the step.
Can be accurately followed by the biasing force of the long support arm 92 and the spring 96, so that the crawler is prevented from coming off in a seesaw shape while preventing the aircraft from tilting back and forth greatly, Running can be performed smoothly.

[0021]

The present invention configured as described above has the following effects. According to the invention of claim 1,
By attaching the mounting part of the traveling frame to which the rear end of the crawler disengagement prevention guide is attached to the mounting member of the movable roller provided near the machine center of gravity, the movable roller can be formed as a long support arm. The vertical movement in the section can be smoothly performed, and the mounting of the movable rolling wheel can be manufactured at a low cost with a simple structure.

According to the second aspect of the present invention, the mounting portion of the crawler disengagement prevention guide is a mounting shaft on which the mounting cylinder having the support arm is rotatably fitted. Between the wheels, it is possible to increase the amount of vertical rotation while installing compactly with an inexpensive configuration.

[Brief description of the drawings]

FIG. 1 is a perspective view of a combine provided with a crawler traveling device of the present invention.

FIG. 2A is a plan view showing a transmission configuration of a mowing unit.
(B) is a sectional side view of the mounting member.

FIG. 3A is a side view of the crawler traveling device. (B) is a side sectional view showing a mounting structure of a movable rolling wheel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crawler running device 7 Crawler 9 Movable rolling wheel 10 Driving wheel 11 Running frame 12 Idling wheel 13, 13a, 13b Lower rolling wheel 15 Upper rolling wheel 70 Core projection 71 Core metal guide (crawler detachment prevention guide) 90 Mounting part (mounting) Shaft) 92 Support arm 96 Spring

Claims (2)

[Claims] 1. A crawler is suspended between a driving wheel and an idler wheel, and an inner peripheral surface of the crawler on a ground contact side is guided by a plurality of lower rollers mounted on a traveling frame. A crawler traveling device for preventing crawler disengagement by facing a crawler disengagement prevention guide, wherein a movable rolling wheel provided in the vicinity of a machine center of gravity among the plurality of lower rolling wheels is mounted on a rear end of the crawler disengagement prevention guide. A movable rolling wheel mounting structure for a crawler traveling device, wherein the movable rolling wheel mounting structure is rotatably mounted on a mounting portion of the crawler traveling device via a support arm. 2. A movable rolling wheel, wherein a mounting shaft of the crawler disengagement prevention guide is a mounting shaft extending from a traveling frame, and a mounting cylinder having a support arm is rotatably fitted to the mounting shaft. 2. The device is mounted so as to be vertically rotatable.
Movable wheel mounting structure for crawler traveling device.