JPH0142965Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a rear cover mounting structure on a rotary portion of a tractor.

(b) Prior Art Conventionally, a structure for attaching a rear cover to a rotary portion of a tractor is disclosed in Japanese Utility Model Application Publication No. 56-30703.

That is, a horizontally elongated cylindrical support frame with a U-shaped cross section that opens rearward is provided at the rear end of the rotary cover, and the cylindrical bodies are attached to the left and right sides of the support frame, and the rear sides of each cylinder are closed. A groove is formed by cutting out the upper and inner half of the blocking plate that closes the left cylinder, and in the groove,
The narrow part formed at the left end of the pivot support provided on the front edge of the rear cover is inserted, so that the left and right ends of the pivot attached to the support can be inserted into the left and right cylinders, respectively. The rear cover moves the entire rear cover to a symmetrical center position, rotates downward, and engages the narrow portion with the inner end of the closing plate, thereby making it possible to restrict lateral sliding of the rear cover.

(c) Problems to be solved by the invention However, in the above rear cover mounting structure, since the groove is formed from the upper half to the inner half of the closing plate that closes the rear side of the left cylinder, it is difficult to attach the rear cover. When installing the rear cover, the pivot attached to the pivot support part must be inserted diagonally into the left cylinder from the rear upper part of the right side to the front lower part of the left side, making it difficult to install a relatively heavy rear cover. Since the rear cover has to be lifted to a higher position than the horizontal position, it is not easy to install the rear cover.Furthermore, the open end of the cylinder is blocked by the cylinder support frame and cannot be seen from above. However, there is a problem in that the end of the shaft cannot be smoothly inserted into the cylinder.

In addition, if the rear cover is pushed upward beyond the horizontal position by scattered soil from tilling, the engagement between the narrow part and the inner end of the closing plate may be easily released, leading to a risk of the rear cover falling off. be.

In addition, since the blocking plate that engages with the narrow portion is thin, it is easily damaged by the frequent up-and-down swinging motion of the rear cover, making it impossible to ensure the control of lateral sliding of the rear cover. .

(d) Means for Solving the Problem Therefore, in the present invention, cylinders for mounting the rear cover are mounted on the left and right sides of the rear edge of the rotary cover, with open ends facing each other at a certain interval. A pivot support part with a width slightly narrower than the above-mentioned constant interval is provided on the edge, and the pivot is attached to the support part so that the left and right ends extend from the support part to the left and right sides, and the left and right ends are The projecting width of the parts is such that one side is wider than the other, and the wide end is inserted into one of the cylinders facing forward to position the pivot axis on the same axis as the left and right cylinders, and In the rear cover mounting structure for the rotary part of a tractor, the rotary cover can be mounted so as to be able to swing up and down about the pivot by inserting the narrow end of the rotary cover into the other front facing cylinder. A groove wider in the axial direction of the cylinder than the narrow end is cut out at the top of the peripheral wall of the cylinder into which the wide end is to be inserted, so that the open end is located at the inner end of the cylinder. death,
On the other hand, on the outer peripheral surface of the wide end, a projecting strip whose left and right width is slightly narrower than that of the narrow end is protruded, and the projecting strip can be used only when the rear cover is in a substantially horizontal state. In conjunction with the insertion operation of the part into the cylindrical body, the narrow end can be inserted into the cylindrical body, and at the same time, the pivot support part can be inserted into the inner end of the cylindrical body. By bringing one end into contact with the outer end of the protrusion,
A stopper ring having a fitting opening at the lower end is fitted onto the outer peripheral surface of the pivot shaft from directly above through the fitting opening during the gap formed between the inner end of the other cylindrical body and the inner end of the other cylinder. It is an object of the present invention to provide a structure for mounting a rear cover on a rotary portion of a tractor, which is capable of regulating the left and right lateral sliding of a pivot shaft by interposing the rear cover.

(e) Actions and Effects According to the present invention, the following actions and effects occur.

In other words, when attaching the rear cover to the rotary cover, place the rear cover in a substantially horizontal position.
The rear cover can be easily attached by inserting the left and right ends of the pivots attached to the rear cover into the cylinders provided on the rotary cover. The groove provided at the top and the protrusion provided at the end of the pivot shaft can only fit together in the same axial direction when the rear cover is placed in a substantially horizontal position. When the rear cover is rotated downward and the rear edge is placed in contact with the ground for normal use, the rear cover will be pushed by the scattered soil from tilling because they will not fit together due to the phasing around the same axis. Even when the cylinder body swings up and down, the protrusion body engages with the inner end of the cylinder body to restrict the horizontal sliding of the pivot shaft, so that the problem of the pivot shaft falling off from the cylinder body does not occur.

Furthermore, since the stopper ring can be interposed between the cylindrical body and the protruding body by fitting the stopper ring from directly above the pivot, by locking the protruding body to the stopper ring. , it is possible to prevent the protruding strip from fitting into the groove, thereby ensuring the regulation of lateral sliding of the shaft, and eliminating play occurring between the cylindrical body and the protruding strip; It is also possible to prevent noise generation due to the backlash.

Furthermore, the protruding strip body, which rotates integrally in conjunction with the up-and-down swing movement of the rear cover, can be fitted onto a pivot shaft and rotated integrally with the protruding strip body, without directly contacting the end surface of the cylindrical body. Since substantially the entire surface of the movable stopper ring is in slidable contact with the end surface of the cylinder, damage to the end surface of the cylinder can be reliably prevented.

Further, the rear cover can also be easily removed by following the steps opposite to those described above.

(F) Example The example of the present invention will be explained in detail based on the drawings.
A indicates a tractor, and the tractor A has a prime mover section 2 at the front of a body frame 1, a transmission case 3 at the rear, and front and rear wheels 4 at the bottom, respectively.
5 is set.

A hydraulic case 6 is mounted on the upper surface of the transmission case 3, and lift arms 7, 7 are rotatably protruded rearward and upward from both rear sides of the hydraulic case 6, and are connected to the tips of the arms 7, 7. The rotary portion B is connected via rods 8,8.

The rotary part B has tilling claws 1 provided in the tilling part 9.
A rotary cover 11 is arranged above 0,
A rear cover 12 is detachably attached to the rear edge of the cover 11.

In other words, the cylinder bodies 13 and 13' for rear cover mounting, whose open ends face each other with a certain distance L between them, are attached to the left and right sides of the rear edge of the rotary cover 11;
A pivot support portion 12a having a width slightly narrower than the constant interval L is provided on the front edge of the rear cover 12, and the support portion 1
The pivot 16 is attached to 2a so that the left and right end portions 16a, 16b extend laterally from the support portion 12a, and the overhang width of the left and right end portions 16a, 6b is such that one is wider than the other. , the wide end 16a is inserted forward into one of the corresponding cylinders 13 to position the pivot 16 on the same axis as the left and right cylinders 13, 13', and the other narrow end 1
6b into the other cylindrical body 13' facing forward, the rotary cover 12 is attached to the pivot 16.
It can be mounted so that it can swing vertically around the center.

Moreover, at the top of the peripheral wall of the cylinder 13 into which the wide end 16a of the pivot shaft 16 is inserted, a narrow end 16b is provided.
The groove portion 14 is wider in the axial direction of the cylinder body 13 than the
The opening end 15 is formed by notching so as to be located at the inner end of the cylindrical body 13, while the outer peripheral surface of the wide end 16a is provided with a protrusion whose left and right width is slightly narrower than that of the narrow end 16b. 17 is provided in a protruding manner, and the protruding strip body 17 is provided with a wide end portion 16a only when the rear cover 12 is in a substantially horizontal state.
It is possible to fit into the groove 14 in conjunction with the insertion operation into the cylindrical body 13.

Furthermore, by inserting the narrow end portion 16b into the cylindrical body 13' and bringing one end of the pivot support portion 12a into contact with the inner end of the cylindrical body 13', the outer end of the protrusion 17 and A fitting opening 1 is provided at the lower end of the gap formed between the inner end of the other cylindrical body 13 and the inner end of the other cylindrical body 13.
A stopper ring 18 having a diameter of 9 is interposed by fitting the outer circumferential surface of the pivot shaft 16 from directly above through the fitting opening 19, so that the left and right lateral sliding of the pivot shaft 16 can be restricted. There is.

Further, the stopper ring 18 described above has a fitting opening 19 at the lower end, and the upper center is bent upward in a convex shape to provide a scoop part 18-1.

The embodiment of the present invention is constructed as described above, and according to this embodiment, the following effects are produced.

That is, the rear cover 1 is attached to the rotary cover 11.
2, the rear cover 12 should be in a substantially horizontal position, and the pivot 1 attached to the rear cover 12 should be
The rear cover 12 can be easily attached by inserting the left and right ends 16a and 16b of the rotary cover 11 into the cylinders 13 and 13' provided on the rotary cover 11, respectively. The groove 14 provided at the top of the peripheral wall of the body 13 and the protrusion 17 provided at the end 16a of the pivot shaft 16 align in the same axial direction only when the rear cover 12 is in a substantially horizontal state. If the rear cover 12 is rotated downward and the rear edge is grounded for normal use after the rear cover is installed, the two parts will be in phase around the same axis and will not be able to mate. In addition, even when the rear cover 12 is pushed by the scattered soil from tilling and swings up and down, the protrusion 17 engages with the inner end of the cylindrical body 13 and restricts the lateral sliding of the pivot 16, so that the pivot 16 The problem of falling off from the cylindrical bodies 13, 13' does not occur.

Moreover, since the stopper ring 18 can be interposed between the cylindrical body 13 and the protrusion 17 by fitting it onto the pivot 16 from directly above, the stopper ring 18 can be interposed between the protrusion 17 By locking the cylindrical body 13 and the protruding strip 17, it is possible to prevent the protruding strip 17 from fitting into the groove 14, thereby ensuring the regulation of lateral sliding of the pivot shaft 16, and also to prevent the cylindrical body 13 and the protruding strip 17 from fitting into the groove 14. It is possible to eliminate the backlash that occurs between the two, and it is also possible to prevent noise generation due to the backlash.

Furthermore, the protrusion body 17, which rotates integrally in conjunction with the vertical swinging movement of the rear cover 12, is attached to the cylinder body 13.
The stopper ring 18, which is fitted onto the pivot shaft 16 and rotates integrally with the protruding strip body 17, is brought into slidable contact on substantially the entire surface of the cylindrical body 13 without directly contacting the end face of the cylindrical body 13. Therefore, damage to the end face of the cylindrical body 13 can be reliably prevented.

Further, the rear cover 12 can also be easily removed by following the steps opposite to those described above.

[Brief explanation of the drawing]

FIG. 1 is a side view of a tractor having a rear cover mounting structure according to the present invention. FIG. 2 is a plan view of the main parts. FIG. 3 is an enlarged plan view of the main part. Figure 4 is an enlarged parts diagram of the main parts. A: Tractor, B: Rotary part, 11: Rotary cover, 12: Rear cover, 13: Cylindrical body, 1
4: Groove, 15: Opening, 16: Pivot, 17: Projection, 18: Stopper ring.

Claims (1)

[Claims for Utility Model Registration] Cylindrical bodies 13 and 13' for rear cover mounting are attached to the left and right sides of the rear edge of the rotary cover 11, with opening ends facing each other with a certain interval L, and on the other hand, the front edge of the rear cover 12. , a pivot support portion 12a having a width slightly narrower than the constant interval L is provided,
The pivot 16 is attached to the support part 12a, and the left and right ends 16a,
16b is attached so as to protrude from the support part 12a to the left and right sides, and the left and right ends 16a, 6b
The width of the extension is made wider on one side than the other, and the wide end 16a is inserted into one of the cylinders 13 facing forward, and the pivot 16 is connected to the left and right cylinders 1.
3 and 13', and by inserting the other narrow end 16b into the other cylindrical body 13' facing forward, the rotary cover 12 can be vertically oscillated about the pivot shaft 16. In a structure for attaching a rear cover to a rotary part of a tractor that can be attached freely, a cylinder 1 into which a wide end 16a of a pivot shaft 16 is inserted.
3, a groove 14 wider in the axial direction of the cylinder 13 than the narrow end 16b is formed at the open end 15.
is formed by notching so as to be located at the inner end of the cylindrical body 13, and on the other hand, on the outer peripheral surface of the wide end 16a, a protrusion 17 whose left and right width is slightly narrower than the narrow end 16b is formed. The projecting strip 17 can be inserted into the groove 14 in conjunction with the insertion operation of the wide end 16a into the cylindrical body 13 only when the rear cover 12 is in a substantially horizontal state. , by inserting the narrow end 16b into the cylinder 13' and bringing one end of the pivot support part 12a into contact with the inner end of the cylinder 13', the protrusion 1 is removed.
7 and the inner end of the other cylindrical body 13, a stopper ring 18 having a fitting opening 19 at the lower end is placed on the outer peripheral surface of the pivot 16 from directly above. A rear cover mounting structure for a rotary part of a tractor, in which the left and right lateral sliding of a pivot shaft 16 can be restricted by interposition by fitting through a fitting opening 19.