JPS60259887A - Sintering pallet truck - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a sintered pallet truck used for transporting sintered powder in a sintered powder warehouse in a steel factory, etc. This invention relates to an improvement of an axle support device.

(Prior Art) A conventionally known axle support device for a sintered pallet truck is, for example, as shown in FIG. 2 (only one side of the axle).
A roller la rolling on a rail (not shown) is connected to an axle 2.
Two ball bearings 3as4a (first
A bush-shaped plain bearing 5a (second bearing) is rotatably supported by a sprocket (not shown) at an axially inner position near the roll 1a. The structure is equipped with bearings). The thrust plate 7a arranged on the end face side of the sliding bearing 5a in the figure is an elastic ring that seals between the axle and the fixed bushing = -82 fitted to the axle. However, as described above, In this configuration, neither the first bearings 3a, 4a that rotationally support the rollers nor the second bearing 5a that engages with the sprocket are sealed type bearings that have a sealing mechanism in the bearings themselves. , the first bearing 3
a, 4a are surrounded and sealed by a lid 9a fixed to the roller and a flange 10a on the opposite side of the roller, and are also sealed by a sliding bearing 5a and a thrust plate 6a. One slide of the bearing is machine 1
The grease is supplied through the first distribution hole 13a formed in the shaft body, which is connected to the grease supply hole 13a formed in the shaft body A.

Therefore, not only is it troublesome to process the distribution hole 13a, but also it is troublesome to supply grease after assembling the bearing, and furthermore, it is difficult to confirm whether or not grease is being supplied reliably. In addition, combined with the imperfection of the sealing mechanism, there were many difficulties in the maintenance of the bearing.In particular, the second bearing, the sliding bearing 5a, has a thrust receiving plate 6a, but the sintered powder [', Since the bearing 5a and the thrust receiving plate 6a are exposed to air, the bearing 5a and the thrust receiving plate 6a wear out quickly, necessitating early replacement, and posing an even bigger problem in terms of maintenance and inspection.

(Purpose) This invention provides a sintered pallet with an axle support structure that allows for easy mounting and holding of bearings, excellent sealing performance and long bearing life (no need for long-term bearing replacement). The purpose is to obtain a trolley.

(Structure) That is, the present invention relates to the conventional sintered pallet truck as described above, in particular, the axle support structure is as described in the claims, and the first bearing and the second bearing are A sealed rolling bearing is equipped with a sealing mechanism in the form of a single bearing, and this sealing mechanism almost certainly prevents grease from flowing inside the bearing and sintered dust from entering from the outside.
This makes it easier to assemble and maintain the bearing, and extends the life of the bearing, making it possible to use the sintered truck for a long time.

(Example) Next, a typical example of the present invention shown in FIG. 1 will be described.
2 is a second bearing of the axle 1 and arranged axially in parallel with the first bearing via the inner ring spacer 5; 6 is a bearing holding plate; 7 is a front cover; It is.

The first bearing 2 includes two inner rings 22 and 23 having tapered raceways that are integrated by a connecting ring 21, and two rows of Qi (the raceways are arranged in a blind-love format) facing the tapered raceways of the inner rings. The bearing 2 is sealed from the inner ring by contact-type seal bodies 8 fixed to the inner peripheral surfaces of both ends of the outer ring U, and the space between the inner and outer rings is sealed in advance. Contains grease as a lubricant.81
is a retaining ring for preventing the seal body 8 from being removed.

The second bearing 4 includes two inner rings 41 with cylindrical raceways,
42, a core @ 4], one outer ring 43 with boxwood having a double-row cylindrical raceway facing the cylindrical raceway of 42, and a plurality of cylindrical rollers arranged between the raceways of the inner and outer rings. It is a double row cylindrical roller bearing. And the four bearings,
Contact type seal bodies 9 fixed to the inner peripheral surfaces of both ends of the outer ring 43 seal the space between the outer ring 43 and the inner ring, and grease as a lubricant is prefilled in the space between the inner and outer rings. It has a heavy seal structure with a contact type sealing part. In order to improve the sealing performance of the first bearing 2, the seal body designated by reference numeral 11 is fixed to the roller 3 so that the inner lip is on the circumference 1AT of the circumferential step of the inner ring spacer 5, and the axial lip is on the circumference 1AT of the circumferential step of the inner ring spacer 5. 0, which is a seal body that is in sliding contact with the side surfaces of the stepped portions (Function and Effect) As described above, in the sintered pallet truck of the present invention, the seal body is fixed to the end of the axle and rotatably supports the roller. The bearing and the second bearing that engages with the sprocket disposed near the roller are both grease-filled sealed rolling bearings equipped with a sealing mechanism as a bearing 1R body, so that the bearing has a lifespan longer than that of the roller. In order to extend this period, it is also advantageous to additionally provide a conventional grease supply mechanism from the shaft side so that grease can be supplied after a certain period of use.

Furthermore, as mentioned above, since the bearing itself is completely sealed, the bearing has excellent sealing properties and is extremely effective in preventing foreign matter, especially sinter dust, from entering from the outside.
l: It is possible to significantly extend the life of the bearing. In particular, the second bearing, which conventionally had a short lifespan, is made into a rolling bearing, and the rolling bearing is made into a completely sealed type filled with grease, which improves the sealing performance and extends the lifespan. The sintered pallet truck enables long-term use without repair.

It goes without saying that the examples are not limited to the structure of the seal body that seals the bearing of the present invention.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part showing a typical embodiment of the present invention, and FIG. 2 is a sectional view of a main part of an axle of a conventional sintered pallet truck. In the symbols of the embodiment, 1 is the axle, 2 is the first bearing, 3 is the roller, 4 is the second bearing, 5 is the inner ring spacer, 8 is the seal body of the first bearing, 9 is the second bearing The seal body 10 is a seal plate.

Claims (1)

[Claims] (1) At the shaft end of the axle of the sintered pallet truck, there is a p-ra that rolls on the rail via a first bearing fixed to the shaft end, and a sprocket after the roller is displaced from the rail. A sintered pallet truck including a second bearing that is independent of the roller and disposed near the roller to engage with the roller, a first bearing that rotatably supports the roller; The second bearing is a grease-filled sealed rolling bearing equipped with a sealing mechanism as a single bearing, and the second bearing disposed near the roller is equipped with a sealing mechanism as a single bearing,
A sintered pallet truck characterized in that it is a grease-filled sealed rolling bearing in which the outer ring rotates as a roller. (2. The sintered pallet truck according to claim 1, wherein the first bearing is a double-row tapered roller bearing, and the second bearing is a double-row cylindrical roller bearing.