JP2005053280A - Crawler type travel device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce vibration transferred from a travel crawler to a machine body frame via a trank roller, in a structure for making the machine body frame rotatably support the travel crawler via the trank roller. <P>SOLUTION: This travel device comprises a rubber-made crawler 9 in which core bars 35 are buried at an equal interval and the trank roller 7 for contactly supporting the inner peripheral surface of the crawler 9. Thick projections 39 are formed in passing sections 37 on the inner peripheral surface of the crawler 9 for passing the trank roller 7 between the core bars 35 of the crawler 9, and longitudinal phases of right and left projections 39 disposed in the right and left passing sections 37 with respect to the center of the crawler 9 are made different. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crawler type traveling device that uses a crawler to travel a traveling part such as a tractor.
[0002]
[Prior art]
There is a technique in which a roller is in rolling contact with an inner peripheral surface of a crawler to support the airframe on the crawler.
(For example, see Patent Document 1)
[0003]
[Patent Document 1] JP-A-8-253177
[Problems to be solved by the invention]
The endless crawler has a plurality of cored bars embedded at approximately equal intervals, and when the wheel is positioned on the cored bar while the machine is running, the cored bar regulates the sinking of the wheel beyond a certain level. However, when the wheel is located between the cores (pitch), it is inconvenient to sink more than a certain level, causing vibration in the airframe.
[0005]
[Means for Solving the Invention]
Accordingly, the present invention includes a rubber crawler that embeds the core metal at equal intervals, and a roller wheel that abuts and supports the inner peripheral surface of the crawler, and the inner surface of the crawler through which the wheel passes between the metal cores of the crawler. Protrusions that increase the thickness of the passages are formed, and the front and rear phases of the left and right protrusions arranged in the left and right passages differ from the crawler center, making the road surface unstable for running with unevenness. In such a place, the vertical movement of the wheels is suppressed to a minimum even in any place, and the vibration generated in the airframe is reduced to improve traveling performance.
[0006]
In addition, a plurality of protrusions are formed between the cores of the crawler to further reduce the vibration generated in the machine body, and foreign matter that enters the crawler and the protrusions at the valleys formed between the plurality of protrusions. Etc. to improve the running performance and durability of the crawler.
[0007]
Furthermore, with respect to the crawler center, a plurality of protrusions formed on the left and right sides are disposed between the cores of the crawler, and a protrusion formed on the other side is disposed between the plurality of protrusions on one side. Therefore, either of the left and right protrusions always hits the wheel at the center of the crawler and suppresses vibrations generated in the fuselage. Contact the wheel to promote the removal and removal of mud adhering to the wheel, and the timing of contact between the protrusion and the wheel is made different on the left and right sides of the crawler center, thereby smoothing the vertical vibration of the wheel slightly. In this state, the machine vibration is suppressed and the left-right balance is stabilized.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a left side view of a crawler type tractor. A front mission case 2 is fixed to the front part of a pair of left and right crawler frames 1 and a left and right drive sprocket 4 is pivotally supported on left and right axles 3 of the front mission case 2. A tension roller 6 is provided at the rear of the crawler frame 1 via a tension frame 5, and a rubber traveling crawler 9 is wound between the drive sprocket 4 and the tension roller 6 via an equalizer wheel 7 and an idler 8, A pair of left and right traveling crawlers 9 are installed on the left.
[0009]
An engine 10 is mounted between the left and right crawler frames 1 above the front portion, the outside of the engine 10 is covered with a bonnet 11, a rear mission case 12 is provided between the left and right crawler frames 1, and a lift arm 13 is provided. A hydraulic lifting cylinder 14, a top link 15 and a lower link 16 are provided in the rear mission case 12, and a farming machine such as a tillage rotary working machine or a plow is mounted on the links 15, 16 so that it can be lifted and removed freely. And so on.
[0010]
Further, a driver's seat 17 is disposed behind the bonnet 11 and above the rear mission case 12, and a handle column 19 having a round steering handle 18 and a brake pedal 20 are placed in front of the driver's seat 17.
[0011]
As shown in FIGS. 2 to 4, the left and right bearings 21 are fixed to the middle of the left and right crawler frames 1 by bolts 22, and the left and right bearings 21 are rotatably supported by a pair of left and right swing plates 24 via pivots 23. A roller shaft 26 is rotatably supported by a shaft boss 25 fixed to the front and rear ends of the swing plate 24, and a pair of left and right wheels 7 are protruded from the shaft boss 25 to the left and right with a key 27 and a pair of wheels 7. It is configured to be attached and fixed via nuts 28, respectively.
[0012]
Further, a crawler fall-off prevention body 29 that is long in the front-rear direction and has a mountain shape in a side view is disposed between the front and rear left and right rolling wheels 7, and the upper center of the mounting plate 30 fixed on the upper surface of the prevention body 29 is disposed in the left-right swing plate 24. The bolts 31 are fixed between them, and the prevention body 29 is caused to face between the engaging protrusions 32 of the two rows facing each other with a predetermined interval in the center of the inner peripheral surface of the crawler 9 to prevent the crawler 9 from falling off. It is configured as follows.
[0013]
4, 5, and 6, the traveling crawler 9 has a plurality of engagement holes 34 that engage with the sprocket teeth 33 of the drive sprocket 4 in the center at a regular interval (equal pitch). A longitudinal metal core 35 is embedded between the engagement holes 34 (pitch) in the left-right direction, the engagement protrusion 32 of the metal core 35 protrudes outside the inner peripheral surface of the crawler 9, and the crawler corresponding to the position of the metal core 35. A grounding lug 36 is formed to protrude on the outer peripheral surface 9.
[0014]
Further, the inner peripheral surface outside the engagement protrusion 32 of the traveling crawler 9 is formed in the wheel left and right passing portion 37 where the left and right roller wheels 7 are in contact with each other, and is raised to the left and right by a certain height inside the outer end inner peripheral surface 38. The thickness between the inner and outer peripheral surfaces of the passage portion 37 is increased.
[0015]
Further, left and right passages for forming the protrusions 39 are formed by forming protrusions 39 having a substantially quadrangular shape in a plan view and a substantially arcuate shape in a side view in the left and right passage portions 37 between the core bars 35 (pitch). The thickness of the portion 37 is made larger than the others to prevent the left and right rolling wheels 7 from sinking to the maximum between the core bars 35, and the phase of the left and right protrusions 39 formed in the same shape is changed back and forth. The contact point between the left and right protrusions 39 and the left and right rolling wheels 7 is shifted in the front-rear direction (offset) by changing the dimension E in the direction, and the rolling of the rolling wheels 7 with respect to the traveling crawler 9 is reduced to facilitate smooth rolling. Thus, the vibration of the airframe is reduced.
[0016]
As is apparent from the above, the rubber crawler 9 in which the core metal 35 is embedded at equal intervals and the roller 7 that contacts and supports the inner peripheral surface of the crawler 9 are provided. 7 is formed on the passage portion 37 of the inner peripheral surface of the crawler 9 through which the thickness 7 passes, and the front and rear phases of the left and right projection portions 39 disposed on the left and right passage portions 37 with respect to the center portion of the crawler 9 are formed. Thus, even when the road surface is unstable and the road surface is unstable, the vertical movement of the wheel 7 can be suppressed to a minimum, and vibration generated in the airframe can be reduced to improve running performance.
[0017]
7 and FIG. 8, the plurality of (two in this embodiment) protrusions 39a and 39b are respectively formed in the front-rear direction of the left and right passage part 37 between the core bars 35 (pitch), and the front and rear protrusions are respectively formed. The trough 40 formed between 39a and 39b makes it possible to easily remove the foreign matter that narrows between the passing portion 37 when passing through the roller 7 and to improve the durability of the rubber crawler 9. It is configured.
[0018]
9 and 10 show a configuration in which different numbers of protrusions 39, 39a, and 39b are provided on the left and right passage portions 37 between the core bars 35 (pitch) of the traveling crawler 9 in the left passage. One protrusion 39 is formed on the portion 37, and two protrusions 39a and 39a are formed on the right passage portion 37 so as to satisfactorily reduce vibration transmitted to the airframe via the traveling crawler 9. It is.
[0019]
As is clear from the above, a plurality of protrusions 39 formed on the left and right sides with respect to the central portion of the crawler 9 are disposed between the core bars 35 of the crawler 9, and the protrusions 39 formed on the other side are on one side. Accordingly, any one of the projections 39 on both the left and right sides of the crawler center portion always hits the wheel 7 to suppress the vertical vibration generated in the airframe. When the projection 39 passes through the roller 7, the roller 7 is brought into contact with a portion other than the projection 39 at one time to facilitate the removal of mud adhering to the roller 7 and the contact between the projection 39 and the roller 7. The timing of the rotation of the roller 7 is made different between the left and right sides of the crawler so that the vertical vibration of the wheel 7 is slightly smoothed, so that the machine vibration can be suppressed and the left / right balance can be stabilized.
[0020]
Also, what is shown in FIG. 11 is the embodiment of FIGS. 9 and 10, and the length of the protrusion 39 c on the left passage portion 37 side with a small number of installations is made large, for example, the number of protrusions 39 installed. According to the above, the shape is provided so as to be different, and the vibration is favorably reduced.
[0021]
As is clear from the above, by forming a plurality of protrusions 39 a and 39 b between the core bars 35 of the crawler 9, vibration generated in the airframe can be further reduced and between the plurality of protrusions 39. By removing the foreign matter that enters the crawler 9 and the protrusion 39 by the formed valley portion 40, the running performance and durability of the crawler 9 can be improved.
[0022]
【The invention's effect】
As described above, as is apparent from the embodiments, the present invention includes the rubber crawler 9 in which the core metal 35 is embedded at equal intervals, and the roller 7 that abuts and supports the inner peripheral surface of the crawler 9. A protrusion 39 is formed on the inner peripheral surface of the crawler 9 through which the wheel 7 passes between the golds 35 to increase the thickness, and the left and right passages 37 are disposed on the left and right passages 37 with respect to the center of the crawler 9. Since the front and rear phases of the projections 39 are made different, the vertical movement of the wheels 7 can be suppressed to a minimum even when the road surface is unstable and the road surface is unstable, and the vibration generated in the airframe is reduced. It is possible to improve the property.
[0023]
In addition, since a plurality of protrusions 39a and 39b are formed between the core bars 35 of the crawler 9, vibration generated in the airframe is further reduced, and a valley formed between the plurality of protrusions 39 is formed. The part 40 can remove foreign matters and the like that enter the crawler 9 and the protrusion 39 to improve the running performance and durability of the crawler 9.
[0024]
Further, a plurality of protrusions 39 formed on one side of the crawler 9 with respect to the center of the crawler 9 are disposed between the core bars 35 of the crawler 9, and the protrusions 39 formed on the other side are a plurality of protrusions 39 on one side. Since the projections 39 on both the left and right sides of the crawler center portion are always in contact with the wheel 7 to suppress vertical vibrations generated in the machine body, When the roller 7 passes, the roller 7 is brought into contact with a portion other than the protrusion 39 at one time to promote removal of mud adhering to the roller 7, and the timing at which the protrusion 39 contacts the roller 7 is crawled. By making the difference between the left and right sides of the central portion so that the vertical vibration of the wheel 7 is slightly smoothed, it is possible to suppress the vibration of the machine and stabilize the left-right balance.
[Brief description of the drawings]
FIG. 1 is a side view of a crawler tractor.
FIG. 2 is an explanatory side view of a roller part.
FIG. 3 is a cross-sectional explanatory view of a wheel section.
FIG. 4 is a cross-sectional explanatory view of a traveling crawler.
FIG. 5 is an explanatory diagram of an inner peripheral surface portion of a traveling crawler.
FIG. 6 is an explanatory cross-sectional view of a protrusion.
FIG. 7 is an explanatory diagram of formation of a plurality of protrusions.
FIG. 8 is an explanatory cross-sectional view of a plurality of protrusions.
FIG. 9 is a diagram illustrating the formation of protrusions with different numbers of installations on the left and right.
FIG. 10 is an explanatory cross-sectional view of protrusions with different numbers of installations on the left and right.
FIG. 11 is a diagram illustrating formation of protrusions having different shapes.
[Explanation of symbols]
7 Roller 9 Crawler 35 Core 37 Passing part 39 / 39a / 39b Protruding part

Claims (3)

It is equipped with a rubber crawler that embeds the core metal at equal intervals and a roller wheel that abuts and supports the inner peripheral surface of the crawler. A crawler-type traveling device characterized in that a protrusion that increases the height of the left and right protrusions is formed and the front and rear phases of the left and right protrusions arranged in the left and right passages are different from the center of the crawler. 2. A crawler type traveling apparatus according to claim 1, wherein a plurality of protrusions are formed between the cores of the crawler. With respect to the crawler center, a plurality of protrusions formed on the left and right sides are disposed between the cores of the crawler, and a protrusion formed on the other side is disposed between the plurality of protrusions on one side. The crawler type traveling device according to claim 1.

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