JPH0594076U - Idler cushion assembly guide - Google Patents

Abstract

(57) [Summary] [Purpose] The center of the idler cushion can be easily assembled without using a special jig. When a support plate fixed to a track frame 1 of a tracked vehicle and an idler cushion 3 including a set impact absorbing recoil spring 4 are assembled, the spring cushion of the idler cushion 3 is assembled. -At the time of assembling, the spring case 5 has the hole 2 of the support plate 2 at the left and right of the hole 2a of the support plate 2 into which the tip 5b on the bottom 5a side of the case 5 is inserted.
A fixed rib 6 that can move toward the center. [Effect] Even if the axis center of the idler cushion and the core of the hole of the support plate are slightly misaligned, alignment is achieved by the guide by the ribs, and finally the assembled state where both cores and core coincide Therefore, not only does a special jig become unnecessary as in the past, but also the difficult assembly is extremely easy according to the present invention.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an idler cushion of a tracked vehicle such as a bulldozer, and more particularly to an idler cushion assembly guide that facilitates assembly.

[0002]

[Prior Art]

 Conventionally, the underbody structure of a tracked vehicle has generally been a structure shown in FIG. 3, for example, in the case of a bulldozer. That is, the crawler belt 23 is provided around the sprocket 21 and the idler 22, and when the sprocket 21 rotates, the crawler belt 23 rotates to drive the vehicle. Here, 24 is a vehicle body, 25 is an earthwork plate, and 26 is a truck frame in which a recoil spring case is housed.

For example, as shown in the side view of FIG. 4, the support structure for the underbody idler cushion has an idler 22 supported on a yoke 27 attached to a track frame 26. A piston rod 28 is attached to the tip of the cylinder 27, and a cylinder 29 for adjustment is externally fitted from one end. An outer peripheral end of the cylinder 29 is formed on a flange 30 and is attached so that one end of a recoil spring 31 fitted on the cylinder 29 comes into contact with the flange 30. The other end of the recoil spring 31 should be attached so as to come into contact with the bottom 33a of the case 33 of the recoil spring 31 slidably fitted to the outer periphery of the grease guide 32 formed on the other side of the cylinder 29. Has been. Then, the tip 33b of the bottom 33a is fitted into the hole 34a of the support plate 34 fixed to the track frame 26, and the nut 35 screwed with the screw provided at the end of the grease guide 32 is tightened. As a result, the coil spring 31 has a set length. A grease fitting 36 is attached to an end surface of the grease guide 32, and a track frame 26 corresponding to this position is provided with a greasing window 37. In the figure, 33c is a flange of the case 33, 38 is a cover, and a dust seal 39 is provided between the end surface of the cover 38 and the piston rod 28 so that water or the like is contained in the case 33. Prevents intrusion.

The tension of the crawler belt 23 is adjusted by inserting a grease gun through the window 37, injecting grease into the cylinder 29 from the grease fitting 36 through the grease guide 32, and pushing out the idler 22. . The force of the recoil spring 31 is always applied to the idler 22, and when the idler 22 receives a large impact from the outside, it is absorbed by the recoil spring 31. When the idler 22 is returned, it can be returned by discharging the grease from the cylinder 29.

[0005]

[Problems to be solved by the device]

 With such a structure, when the idler cushion A'ssy (excluding the piston rod 28) including the set recoil spring 31 and the like is attached to the track frame 26, as shown in FIG. After inserting the jig 40 as indicated by the chain double-dashed line into the cylinder 29 into which the rod 28 is not yet fitted, while operating the handle 40a of the jig 40, the inside of the track frame 26 which cannot be seen directly below The tip 33b of the bottom 33a of the case 33 is inserted into the hole 34a of the support plate 34 in such a manner that it is aligned with the core of the bottom 33a. However, since this assembly work is a blind work as described above, it has a drawback that it is difficult to insert it, and therefore the work efficiency decreases, which is a problem.

In view of this, the present invention provides a guide for assembling an idler cushion that enables easy centering in the assembly work without using a special jig as described above. The purpose was to eliminate the drawbacks of the.

[0007]

[Means for Solving the Problems]

 As a means for solving the above-mentioned problems of the prior art, the present invention assembles a support plate fixedly mounted on a track frame of a tracked vehicle and an idler cushion including a set recoil spring for shock absorption. A rib that allows the spring case to move toward the center of the hole of the support plate when assembled to the left and right of the hole of the support plate into which the bottom end of the idler cushion's spring case is inserted. Is fixed.

[0008]

[Action]

 According to the above configuration, even when the idler cushion is misaligned with the hole of the support plate during assembly, the idler cushion can be moved along the inclined surface of the rib that is set to align the core in advance, so that the operator Even blind work where direct alignment is not visible is easy to assemble with the support plate.

[0009]

【Example】

 1 is a side view of an embodiment of an assembly guide for an idler cushion according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.

The present invention will be described below with reference to the embodiments shown in FIGS. 1 and 2. The present invention relates to an assembly of a support plate 2 fixedly mounted on a track frame 1 of a track-type vehicle and an idler cushion 3 including a set recoil spring 4 for absorbing shock, when the spring of the idler cushion 3 is assembled. A rib that allows the spring case 5 to move toward the center of the hole 2a of the support plate 2 when assembled to the left and right of the hole of the support plate 2 into which the tip 5b on the bottom 5a side of the case 5 is inserted. It is composed of 6 fixed.

The structure and function of the idler cushion 3 are the same as those shown in FIG. 4, except for the reference numerals, but the components and functions are the same. Therefore, only the main points will be described in this embodiment. That is, the other end of the yoke 8 that supports the idler 7 on one side is formed in the piston rod 9, and the piston rod 9 is fitted in one side of the cylinder 10 having the flange 10a on one side and the other side of the cylinder 10 A grease guide 11 having a grease passage inside is fixedly attached to the end and integrated with the cylinder 10. One side of the recoil spring 4 is attached to the flange 10a, and the other side of the recoil spring 4 is attached to the bottom 5a side of the spring case 5. A flange 5c is provided at the end of the sprinkling case 5 opposite to the bottom 5a side, and a cover 12 is attached to this part. A tip 5b on the bottom 5a side of the spring case 5 is slidably fitted on the outer periphery of the grease guide 11, and a screw is provided at the end of the grease guide 11 to attach to this screw. The spring case 5 is integrated with the grease guide 11 by screwing and tightening the nut 13. Further, a grease fitting 14 is provided on the end surface of the grease guide 11. In the figure, 15 is a window provided in the track frame 1 into which the grease gun is inserted. The ribs 6, which are the main part of the present invention, are fixed upright on the left and right track frames 1 of the holes 2a of the support plate 2, and have a constant width with an inclined surface that rises from the front to the rear. The ribs 6 and 6 are made of a pair of plates, and the distance between the ribs 6 is set so that the outer circumference of the spring case 5 is close to each other, as shown in FIG. A rotation stop plate 16 is provided on the end surface of the nut 13 of the grease guide 11.

Next, the operation will be described. In order to assemble the idler cushion 3 including the recoil spring 4, the spring case 5, the cylinder 10, the grease guide 11 and the like into the hole 2a of the support plate 2 of the track frame 1, the idler cushion 3 should be A '. With the ssy still kept, the ribs 6 and 6 are inserted and moved toward the support plate 2. At this time, if the axial center of A'ssy (the axial center of the spring case 5) and the core of the hole 2a of the support plate 2 are misaligned, the outer periphery of the spring case 5 and the rib 6 will come into contact. . However, when A'ssy is pushed in as it is, since the spring case 5 is cylindrical, the axial center of A'ssy moves toward the hole 2a of the support plate 2 along the hypotenuse of the rib 6, and finally, The tip 5b of A'ssy is inserted into the hole 2a of the support plate 2 to complete the assembly. As described above, since the present invention uses the rib 6 as a guide, the assembly is easy. Although the above explanation is for the case where the piston rod 9 is not included in the idler cushion 3, the same can be applied to the case where the piston rod 9 including the idler 7 is fitted into the cylinder 10 and then assembled.

[0013]

[Effect of the device]

 As described above, according to the present invention, when the support plate fixed to the track frame of the tracked vehicle and the idler cushion including the set shock absorbing recoil spring are assembled, the idler is assembled. Ribs are fixed to the left and right of the hole of the support plate into which the bottom end of the spring case of the cushion is inserted, so that the spring case can move toward the center of the hole of the support plate during assembly. Therefore, even if the axis center of the idler cushion and the core of the hole in the support plate are slightly misaligned, alignment is achieved by the guide by the ribs, and finally the core and core can be aligned. As a result, not only is a special jig unnecessary as in the past, but also difficult assembling becomes extremely easy according to the present invention.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a side surface of an embodiment of an assembly guide for an idler cushion according to the present invention.

FIG. 2 is an explanatory view showing a cross section taken along the line AA of FIG.

FIG. 3 is an explanatory view showing a side surface of a known bulldozer.

FIG. 4 is an explanatory view showing a side surface of a conventional idler cushion.

FIG. 5 is an explanatory view showing a procedure for assembling a conventional idler cushion.

[Explanation of symbols]

 1 Track Frame 2 Support Plate 2a Hole 3 Idler Cushion 4 Recoil Spring 5 Spring Case 5a Bottom 5b Tip 6 Rib

Claims (1)

[Scope of utility model registration request] 1. An assembly of a support plate fixed to a track frame of a tracked vehicle and an idler cushion including a set shock absorbing recoil spring,
At the time of assembling to the left and right of the hole of the support plate into which the bottom end of the spring case of the idler cushion is inserted,
A guide for assembling an idler cushion, wherein the spring case is provided with a fixed rib that can move toward the center of the hole of the support plate.