JPS6254936B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cartridge type hinge device.

Conventionally, a so-called cartridge-type hinge device, which contains lubricant internally, has often been used for a pivot joint between two members that is subject to severe wear, such as when a working device is hinged to the end of a lift arm of an earthmoving vehicle. As shown in FIG. 1, this hinge device is constructed by tightening bolts 6 to a sleeve bearing 5 having a lubricant retaining groove 4 inside the tip opening 3 of a lift arm 2 having a slot 1, and inserting a pin into the sleeve bearing 5. An element 7 is rotatably provided, a cone 9 having a tapered outer surface is installed with a seal 8 sandwiched between both ends of the pin element 7, and a collet 10 having an inner tapered surface corresponding to the tapered outer surface is worked. The device (not shown) is fitted onto the wrapper surface of the conical body 9 within the opening 12 of a forked mounting bracket 11 fixed to the back side of the device, and the two collectors 10, 10 are connected to the pin element 7 and the conical body 9. The hinge between the lift arm 2 and the mounting bracket 11 is achieved by tightening bolts 13 and nuts 14, which are inserted into holes formed through the collet 10, so that they approach each other. However, in the conventional cartridge type hinge device, the long bolt 13 is attached to the hard hardened pin element 7.
Not only is it necessary to drill holes for pushing through and process the tapered surface of the conical body 9, but also the collet 10 and conical body 9, which have complicated structures, are disadvantageous in that the manufacturing cost is high. Further, the above-mentioned conventional devices have a disadvantage that they are difficult to attach and detach due to their complicated structure and require a great deal of time and expense to assemble and disassemble.

The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and for this reason, the present invention hinges one member having an opening to the bifurcated ends of the other member having an opening having a diameter different from that of the opening. In a cartridge-type hinge device for use in a cartridge type hinge device, a solid pin element is inserted into the openings of the two members, and a solid pin element is press-fitted onto the pin element near each end of the pin element and press-fitted into the opening of the bifurcated end. a pair of spaced apart bushes, a sleeve bearing rotatably provided on the pin element between the spaced apart bushes and having a lubricant retaining groove between the sleeve bearing and the sleeve bearing on the pin element; and a sealing member provided between the sleeve bearing and each bushing, and a protective ring provided between the sleeve bearing and each bushing around each sealing member. The present invention is characterized in that it is possible to use an inexpensive ordinary solid pin element for the hinge device without the need for extensive modification.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

Fig. 2 shows a case in which the present invention is applied to a hinge device for pivotally mounting a bucket to the tip of a lift arm of an earthmoving vehicle. Slit, 3 is an opening formed at the tip of the same arm, 11
12 indicates a forked mounting bracket fixed to the back surface of the bucket, and 12 indicates an opening formed in each mounting bracket 11, which is concentric with the opening 3 but has a larger diameter than the opening.

Thus, the cartridge type hinge device according to the present invention includes a solid pin element 15 inserted into the tip opening 3 of the lift arm 2 and the opening 12 of each mounting bracket 11, and near each end of the pin element. The pin element 1 is inserted in order to eliminate the gap between the pin element 15 and the opening 12 of the mounting bracket 11.
A bushing 16 is provided which is press-fitted onto 5 and into said opening 12. Between these pair of spaced apart bushes 16, 16 is the pin element 1.
a sleeve bearing 5 rotatably disposed on the pin element and having a lubricant retaining groove 4 between the sleeve bearing 5 and the pin element;
is provided. The sleeve bearing 5 is inserted into the opening 3 at the tip of the lift arm 2, and is integrally fixed to the lift arm 2 by tightening the bolt 6 at the slot 1 part. The lubricant retaining groove 4 communicates with a fitting 17 for lubricant supply formed at the tip of the lift arm 2 through a through hole 4a and a circumferential groove 4b provided over a range of about 60° on the outer circumference of the sleeve bearing 5. are doing. As shown in FIG. 3, the lubricant supply fitting 17 can supply lubricant with good serviceability by drilling and threading a hole at a position approximately 40 degrees from the horizontal axis of the opening 3. . A seal member 8 is provided between the sleeve bearing 5 and each bush 16 on the pin element 15 in order to prevent lubricant from leaking and to prevent dust from entering from the outside. Further, around each seal member 8, a ring 18 for protecting the seal member is provided between the sleeve bearing 5 and each bush 16. A washer 19 is provided on the pin element 15 between the end side of the lift arm 2 and the opening side of each mounting bracket 11 to eliminate looseness between the lift arm and the bucket. A plate member 20 is welded to one end of the pin element 15, and the plate member 20 is secured to the mounting bracket 11 by a bolt 22 via a spacer 21 welded to one side wall of the mounting bracket 11. This allows pin element 1
5 and a bush 16 press-fitted onto the pin element.
is fixed in position to the mounting bracket 11.

The hinge device having the above configuration is a lift arm 2 in which a conventional cartridge type hinge device is incorporated.
The mounting bracket 11 can be assembled without making any major changes to the width, a general solid pin can be used as the pin element 15, and there is no need for a collet or cone with a complicated structure as in the conventional case. Since it is made of components that are relatively easy to process and have a simple structure, it can be manufactured at low cost. Further, since the hinge device according to the present invention has a relatively simple structure, it can be easily assembled and disassembled.

In addition, although the above-mentioned embodiment was described in particular in connection with the pivot connection between the lift arm and the bucket of the earthmoving vehicle, the present invention is not limited thereto. It is applicable to a cartridge-type hinge device for hinged connection with the forked end of the other member having the present invention.

As described above, according to the present invention, a cartridge type hinge device can be obtained that can be manufactured at low cost and is easy to assemble and disassemble.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional cartridge type hinge device, FIG. 2 is a view similar to FIG. 1 showing an embodiment of the present invention, and FIG. 3 is a side view showing the tip of a lift arm. 2: Lift arm, 3: Opening, 4: Lubricant holding groove, 5: Sleeve bearing, 8: Seal member,
11: Mounting bracket, 12: Opening, 15: Pin element, 16: Bush, 17: Fitting, 2
0: plate member, 21: spacer, 22: bolt.

Claims (1)

[Scope of Claims] 1. A cartridge-type hinge device for hingedly connecting one member having an opening to the bifurcated ends of another member having an opening having a diameter different from that of the opening,
a solid pin element inserted into openings in said members; a pair of spaced apart bushings press-fit onto said pin element near each end of said pin element and press-fit into said forked end opening; , a sleeve bearing rotatably provided on the pin element between the spaced apart bushes and having a lubricant retaining groove between the sleeve bearing and the pin element; and a sleeve bearing provided between the sleeve bearing and each bush on the pin element. A cartridge-type hinge device comprising a sealing member having a sealing member and a protective ring provided between the sleeve bearing and each bushing around each sealing member. 2. The cartridge type hinge device according to item 1, wherein a lubricant supply fitting that communicates with the lubricant holding groove of the sleeve bearing is formed on the one member. 3. The cartridge type hinge device according to item 1, wherein a plate member is fixed to one end of the pin element, and the plate member is bolted to one side wall of the forked end. 4. The cartridge type hinge device according to item 3, wherein a spacer is fixed to one side wall of the forked end, and the bolt is screwed into the same side wall via the spacer. 5. The cartridge type hinge device according to item 1, wherein a washer is provided on the pin element between each end of the one member and the corresponding end of the other member.