JPS6033761Y2 - Agricultural tractor work equipment mounting device - Google Patents

Description

[Detailed description of the invention] The present invention is a work implement mounting device for an agricultural tractor, and in particular, a lower link bracket for mounting a lower link of a three-point link mechanism, a check chain bracket for connecting a check chain, and a safety frame. It's about structure.

The safety frame of an agricultural tractor is usually attached to the rear axle housing. (See No. 7811, 1973).

In this structure, when the safety frame collides with an obstacle, the load acts directly on the rear axle housing.

In this case, it is fine if the bolts fixing the safety frame are simply broken, but in some cases, the rear axle housing itself may be damaged, or the screw holes in the rear axle housing may be crushed, making it impossible to reinstall the safety frame. In the end, the expensive rear axle housing itself has to be replaced.

On the other hand, the bracket for attaching the check chain to the lower link has traditionally been attached to the transmission case, but recently it has also been considered to attach it to the rear axle housing (for example, Utility Model No. 51-1151).
(Refer to No. 08), such a structure has the advantage that the transmission case side can be configured simply, but the present invention is designed to attach the lower link and check chain to the rear axle housing in this way. By summarizing the installation of these brackets and the safety frame, the structure is compact and simple, and each of the brackets functions as a protection member for the rear axle housing when an excessive load is applied to the safety frame. We aim to provide a structure for mounting work equipment with excellent safety.

To explain the configuration of the present invention based on drawings showing one embodiment, FIG. 1 shows a tractor with an engine 1 mounted on the front part of the body, a clutch housing 2 at the rear part, and a transmission case 3 connected to the rear part. The safety frame 4, which protects the passengers in case the aircraft falls over, is attached to the rear axle housing 5 that protrudes left and right from the mission case 3 through plates 6 and 7 for upper and lower attachment. fender 9 with the front side fixed to step 8
The rear lower end is also fixed to the upper surface of the rear axle housing 5.

Reference numeral 10 denotes a rear axle housed within the rear axle housing 5, which transmits the power from the transmission case 3 to the rear wheels 11.
It is intended to be communicated to the public.

2 and 3 show the details of the attachment part of the safety frame 4, and the upper attachment plate 6 attached to the upper surface of the rear axle housing 5 is attached to the rear axle housing 5.
The extension portion 12 is welded to the middle of the safety frame 4.

Reference numeral 13 denotes a fixed piece connected to the rear of the lower end of the fender 9, and between this fixed piece 13 and the above-mentioned mounting plate 6, there is a disc-shaped spacer 14, 14 and a vibration-proof rubber 15.
15 is interposed therebetween, and another vibration isolating rubber 16.16 is placed on the upper surface of the fixed piece 13, and the lower end of the rubber 17.17 inserted through these is attached to the rear axle housing. The fender 9 and the upper mounting plate 6 are tightened together and fixed to the rear axle housing 5 in this way. There is.

Next, 19 shown in FIGS. 2 and 3 is a check chain bracket consisting of a fixing plate 20 and a bracket main body 21 vertically installed on the fixing plate 20, and 22 shown in FIG. A lower link bracket consisting of two bracket bodies 24 and 24 vertically installed on a fixed plate 23,
As shown in FIG. 3, these check chain brackets 19 and lower link brackets 22 are arranged on the lower plane of the rear axle housing 5, and their lower attachments are stacked parallel to the lower surface of the plate 7, and inserted from below. By means of a plurality of bolts 25, this lower mounting is co-tightened together with the plate 7 and fixed to the lower surface of the rear axle housing 5.

26 indicated by a two-dot chain line in FIG. 3 indicates the connecting end of the check chain, and in this way, the check chain bracket 1
They are connected by inserting a pin 28 into a connecting hole 27 drilled in 9.

Further, 29, also indicated by a two-dot chain line, indicates a connecting end of the lower link, which is rotatably connected by a pin 30 inserted between the bracket bodies 24 and 24.

On the other hand, the rear end of the lower mounting plate 7 fixed to the lower surface of the rear axle housing 5 as described above extends rearward from the corner of the rear axle housing 5 and each fixed plate 20, 20, and The lower end of the safety frame 4, to which a board 32 is fixed, is fixed to the protrusion 31 by bolts 33.

34 is a long hole into which the bolt 33 is inserted. The present invention has the above-mentioned structure.In this way, in this invention, a plate is placed for mounting the safety frame at the bottom of the rear axle housing, and a lower link bracket and a check chain bracket are attached to the bottom surface of the plate. Since the fixing plates are mounted one on top of the other, the plates and brackets can be assembled in one place, which has the effect of making the overall structure more compact.

In the present invention, in order to bring the above three into one place, instead of forming them in one piece, they are purposely made into separate bodies, and the mounting plate is stacked on the lower plane of the rear axle housing. The fixing plates are stacked and fastened together, and in the above installation, the plate extends from the corner of the rear axle housing and the fixing plate, and the safety frame is attached to this extension, so the safety frame does not collide with obstacles. For example, if the extension part of the plate receives an upward force, it will be installed upward by using the corners of the rear axle housing as a distraction, and if the extension part of the plate receives a downward force, each bracket fixing plate will be installed. The rear axle housing can be easily bent downward using the corner of the plate as a fulcrum, so even if it receives force in either direction, this installation prevents excessive force from being applied to the rear axle housing itself due to the bending of the plate. This has the effect of avoiding damage to the expensive rear axle housing.

[Brief explanation of the drawing]

FIG. 1 is an overall front view showing one embodiment of the present invention, FIG. 2 is an enlarged view of the main parts in FIG. 1, and FIG. 3 is a bottom view thereof. 4...Safety frame, 5...Rear axle housing, 6,7...Mounting plate,
10...Rear axle, 19...Check chain bracket, 22...Lower link bracket, 20, 23...Fixing plate, 25...
·bolt.

Claims (1)

[Scope of utility model registration request] Place a plate for mounting the safety frame on the lower plane of the rear axle housing that houses the axle, and then stack the lower link bracket and check chain bracket fixing plates on the bottom surface of the mounting plate. The safety frame is collinearly fixed to the rear axle housing with bolts, and the lower end of the safety frame is attached to the plate extension portion extending outward from the corner of the rear axle housing and the fixing plate. Work equipment mounting device for agricultural tractors.