JPH0579038U - Drive shaft bearing structure of friction roller conveyor - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To improve wear resistance by eliminating wear due to vibration at the bearing connection part of the drive shaft of the friction roller conveyor. [Structure] The connecting parts of the drive shaft are made into a half-cut structure, and these half-cut structure parts are overlapped with each other to form a receiving hole in the half-cut structure part on one side in the axial direction. The key member is assembled to the surface of the half-cut structure by inserting the provided insertion pin, and the bush having the key groove is press-fitted inside the inner race of the bearing bearing by aligning the key groove with the key member. ..

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bearing structure of a connection portion of a drive shaft of a friction roller conveyor.

[0002]

[Prior Art]

 In the friction roller conveyor, a drive shaft is connected to correspond to the conveyor length, and the bearing structure is formed by bearing this connection part on a bearing bearing. Even in the past, the connecting portion of the drive shaft had a half-cut structure at its connecting end, and the half-cut portions were superposed on each other to bear the superposed portion on the bearing.

[0003]

[Problems to be solved by the device]

 In this conventional bearing structure, the polymerized half-cut structure portion is directly supported on the inner side of the inner race of the bearing bearing, or a bush is press-fitted between the inner race and the half-cut structure portion to form a bearing structure. In the former bearing structure, a gap is created between the half-cut structure part, which is the connection part, and the bearing inner race, and the drive shaft is constantly receiving a load. There was a problem in that it caused slippage and an abrasion phenomenon. Also, in the latter bearing structure, the structure in which the above-mentioned half-cut portion overlaps causes a bending phenomenon in this half-cut structure portion to rotate, so that uniform surface contact is obtained between the bush and the half-cut structure portion. However, as a result, the surface pressure becomes insufficient and the bush wears.

The present invention has been made in view of the above problems of the prior art. The purpose of the present invention is to prevent wear due to vibration or friction at the bearing connection portion of the drive shaft of the friction roller conveyor. It is intended to provide a new bearing structure with reduced wear and high durability.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the drive shaft bearing structure of the friction roller conveyor according to the present invention is such that the connecting parts of the drive shafts are made into half-cut structures and these half-cut structure parts are overlapped with each other, so that the half-cut structure part on one side is slightly offset. A key hole is formed in the axial direction, and the key member is assembled to the surface of the half-cut structure by inserting an insertion pin protruding from the key member into this hole. Is fitted into the inner race of the bearing and is press-fitted to the key member.

[0006]

[Action]

 In the bearing structure of the present invention, the key member is assembled on the surface of the connecting portion by inserting the inserting pin protruding from the key member into the receiving hole formed in the half-cut structure portion of the connecting portion of the drive shaft. Since a key groove for receiving the above key member is formed in the bush press-fitted between the bearing inner race and the bearing inner race, the connection portion formed by overlapping the half-cut structure portion, the bush, and the bearing inner race are integrated, These match and rotate.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 3 shows a side view of the friction roller conveyor. In the figure, reference numerals 1 and 1 denote machine frames, and a large number of rollers 2 are installed between the machine frames 1 and 1. One of the central axes of the rollers 2 is directly supported on the machine frame 1, while the other is supported on the machine frame 1 by attaching a shaft support member (not shown). In the drawing, reference numeral 4 denotes a drive shaft, which is arranged inside the machine frame 1 to which the shaft support member is attached, in parallel with the machine frame and penetrating the shaft support member, and by a bearing structure described later in the present invention Has been done.

The friction roller conveyor has a relatively long length, and a drive shaft is positioned along the entire length thereof, and the drive shaft is arranged with a plurality of drive shafts connected thereto. The connecting portion of this drive shaft has connecting ends 4 and 4 of each shaft as half-cut structure portions 5 and 5. In other words, it is constructed by cutting in such a way that the shaft end becomes semicircular and cutting out half of it. A receiving hole 6 extending in the axial direction is formed in the half-cut structure portion 5 at one of the connecting ends 4 at some displacement.

Reference numeral 7 in the drawing is a key member, and an insertion pin 8 is provided so as to project so as to have a T-shape as a whole. The insertion pin 8 is inserted into the receiving hole 6 formed in the half-cut structure portion 5 of the drive shaft 2 to attach the key member 7 to the surface of the half-cut structure portion 5.

The connecting portion of the drive shaft 2 is formed by superimposing the half-cut structure portions 5 and 5 at the respective shaft ends, and is supported by a bearing bearing 9 mounted on the machine casing 1 similarly to the previously known bearing structure. It In the present invention, the bush 11 is press-fitted between the connecting portion formed by the overlapping portions of the half-cut structure portions 5 and the inner race 10 of the bearing bearing 9, and the key member is provided inside the bush 11. 7 is formed, and the bush 11 is pressed into the key member in a state where the key groove is received.

In the bearing structure of the present invention having the above-described configuration, the key member 7 assembled to the half-cut structure portion 5 which is the connection portion is in the state of being received in the key groove 12 of the bush 11, The connecting part and the bush always rotate in a state of being in close contact with each other in the rotating direction, and also rotate integrally with the inner race 10 of the bearing 9.

[0012]

[Effect of the device]

 As described above, in the drive shaft bearing structure of the present invention, the key member is assembled to the half-cut structure part that is the connection part, and the key groove is formed inside the bush press-fitted between the half-cut structure part and the inner race of the bearing. Since the key member is inserted in this key groove, there is no slip between the inner race and the bush, or between the bush and the half-cut structure, and the wear of these members is reduced, so that the durability is improved. It has the effect of having a high bearing structure.

[Brief description of drawings]

FIG. 1 is a front view showing a bearing structure of the present invention.

FIG. 2 is an exploded perspective view showing a main part of the bearing structure of the present invention.

FIG. 3 is a side view showing a friction roller conveyor.

[Explanation of symbols]

 4 Connection end 5 Half-cut structure part 6 Receiving hole 7 Key member 8 Insertion pin 9 Bearing 10 Inner race 11 Bushing 12 Key groove

Claims (1)

[Scope of utility model registration request] 1. A driving shaft connecting portion is made into a half-cut structure mutually, and these half-cut structure parts are overlapped with each other to form a receiving hole toward the axial center in the half-cut structure part on one side, and the key member is provided in this receiving hole. Assemble the key member to the surface of the half-cut structure by inserting the insert pin that protrudes from the, and press the bush with the key groove into the inner race of the bearing bearing by aligning the key groove with the key member. The drive shaft bearing structure of the friction roller conveyor is characterized by: