JPH074924U - Plain bearing - Google Patents

Abstract

(57) [Summary] [Purpose] The sliding bearing prevents the sintered layer from peeling off during vehicle operation. [Structure] A flat steel base material 2 obtained by sintering a lead bronze alloy 3 on the surface is rolled into a cylindrical shape with the alloy inside, and one end surface is formed into a flange surface 4 for receiving a thrust load by pressing. In the bearing 1, the flange surface 4 is divided into substantially equal lengths on one end surface of the base material 2 before processing 1
Or more than one and the depth h is 1/3 to 3 of the flange surface height H
With notch 5 that is / 3. [Effect] By providing the notch, the degree of circumferential extension in the vicinity of the flange is reduced during flanging, and therefore cracking can be prevented. Also,
Since the thrust surface is not cracked, it can be subjected to a high load for a long period of time, resulting in high durability and a good appearance (look).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plain bearing suitable for upper and lower wheels of a tracked construction vehicle such as a bulldozer and for a rolling wheel such as an idle wheel.

[0002]

[Prior art]

 Generally, a bearing is used between the roller shaft and the roller shaft of a wheeled construction vehicle such as a bulldozer, but this bearing has a radial direction that acts between the roller shaft and the roller (roller). It is designed to receive the load, the axial load acting on the thrust surface of the roller and the wheels fixed in the axial direction with respect to the wheel axle, and the rotational load acting on each surface. For this reason, the sliding surface of the bearing used for this is sintered with an alloy with good slidability, such as lead bronze alloy, into a steel plate, which is then deformed by bending to form a cylindrical portion, which is then supported in the radial direction. A plain bearing with a collar was used for the so-called wound bearing, which was made into a surface, and one end of the cylindrical end surface was opened to form a flange-shaped thrust receiving surface.

[0003]

[Problems to be solved by the device]

 However, since the flange, which is the thrust bearing surface of such a slide bearing, requires a large amount of elongation due to die pressing, if the ratio of the bearing inner diameter to the thrust surface outer diameter is relatively large, the thrust bearing surface will have a circumferential direction. There are drawbacks such as cracking of the sintered alloy due to a large degree of elongation, which makes the appearance unsightly, and peeling of the sintered layer from the cracked portion during operation of the vehicle.

In view of this, the present invention aims to solve the drawbacks of the prior art by providing a sliding bearing for a tracked vehicle that can prevent the sintered layer from peeling off during operation of the vehicle. It was done as a target.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is a flange surface for rolling a flat steel base material obtained by sintering a lead bronze alloy on the surface into a cylindrical shape with the alloy inside and receiving a thrust load by pressing one end surface. In the plain bearing formed in the above paragraph, the length is divided into approximately equal parts on one side end face of the base material before processing which becomes the flange face, and the depth is 1/3 of the flange face height. It is characterized by having a notch of 3/3.

[0006]

[Action]

 According to the above configuration, since the notch is provided, the peripheral portion of the notch is less likely to be extended in the circumferential direction, and cracks do not occur.

[0007]

【Example】

 FIG. 1 is a working process diagram of (a) a plane state before processing and (b) a plastically deformed state (perspective view) of a rolling bearing for a tracked vehicle according to the present invention, FIG. Shows a slide bearing for a rolling wheel according to the present invention, (a) is a sectional view, (b) is a front view, FIG. 3 is a detailed view of a portion P in FIG. 2, and FIG. 4 is a state mounted on a rolling wheel. FIG.

Hereinafter, the present invention will be described with reference to FIGS. 1 to 4. The rolling bearing of a tracked vehicle according to the present invention has a flat plate-shaped steel base material 2 obtained by sintering a lead bronze alloy 3 on the surface, rolled into a cylindrical shape with the alloy inside, and one end surface is pressed. In the plain bearing 1 formed on the flange surface 4 for receiving the thrust load, one or a plurality of parts each of which has a length substantially equal to one side end surface of the base material 2 before processing which becomes the flange surface 4 are formed. It comprises a notch 5 having a depth h of 1/3 to 3/3 of the flange surface height H.

In the present invention, as shown in FIG. 1A, first, the long side of a rectangular steel base material 2 obtained by sintering a lead bronze alloy 3 as an alloy having a good slidability on the surface is shown in FIG. The flange is formed by bending the lead bronze alloy 3 so that the lead bronze alloy 3 is on the inside, and then the lead bronze alloy 3 sintered on one side is on the outside. The surface 4 is formed by pressing. In this case, one or a plurality of notches 5 (two in the embodiment) are provided on the thrust surface 4, which serves as a receiving surface during the processing of the flange, so as to eliminate a large area extending in the circumferential direction. For this reason, the periphery of the notched portion is less likely to be stretched in the circumferential direction, and cracking can be prevented. It is desirable that the bottom of the notch 5 be appropriately rounded. Details of the plain bearing 1 obtained by such processing are shown in FIGS. 2 and 3. A lead bronze alloy 3 is sintered on the base material 2 on the sliding surface 1a in FIG. 2 (a). Since the boundary portion 6 between the flange surface 4 and the sliding surface 1a is formed so as to be bent, it peels off even if it is sintered in this portion. Therefore, the lead bronze alloy 3 should not be sintered from the beginning. The material 2 is left as it is. Also, the large notch 7 shown in FIG. 2 (b) is obtained by rolling the base material 2 and opening the abutting surface when processing the end face into a flange shape, and the notch 5 according to the present invention has the remaining circumference. 1 to a plurality of pieces are provided so as to divide the bearing into equal parts, but an appropriate number can be provided depending on the size of the flange formed on the bearing to prevent cracking. Although the notch 5 has a triangular shape in the embodiment, it may have a notch shape having notches having the same depth.

Next, the load when mounted on the wheel will be described. As shown in FIG. 4, the sliding bearing 1 according to the present invention is press-fitted into the inner diameter of the rolling wheel (roller) 8 to be integrated, and the shaft 10 press-fitted into the collar 9 is fitted inside the sliding bearing 1. Being rotated. In this case, the load in the radial direction from the rolling wheel (roller) 8 is received by the sliding surface between the shaft 10 and the inner diameter of the slide bearing 1. Further, the slide bearing 1 is mounted integrally with the rolling wheel 8 with a certain clearance from the collar 9. The load in the thrust direction applied to the rolling wheels 8 is received by the sliding surfaces of the flange surface 4 and the collar 9. However, the slide bearing 1 according to the present invention is provided with the notch 5 so that the surface of the flange face 4 is not cracked, a good and smooth surface is obtained, and it can withstand a high load for a long time.

[0011]

[Effect of device]

 As described above, the present invention uses a flat steel base material obtained by sintering a lead bronze alloy on the surface, rounds it into a cylindrical shape with the alloy inside, and one end surface is a flange surface for receiving a thrust load by pressing. In the plain bearing formed in 1, the length is divided into approximately equal parts on one side end face of the base material before processing which becomes the flange face, and the depth is 1/3 to the flange face height. Since the cutout is 3/3, by providing the cutout, the degree of circumferential extension in the vicinity of the flange is reduced during flanging, and thus cracking can be prevented. In addition, since there is no crack on the thrust surface, it can be subjected to a high load for a long time, resulting in higher durability and a good appearance (look).

[Brief description of drawings]

FIG. 1 is a perspective view showing a working process diagram of a rolling bearing for a wheeled vehicle of a tracked vehicle according to the present invention, in which (a) shows a state before working and (b) shows a state after plastic deformation after working. FIG.

FIG. 2 shows a sliding bearing for a rolling wheel according to the present invention, (a)
Is a cross-sectional view, and FIG.

FIG. 3 is an explanatory diagram showing details of a P portion in FIG.

FIG. 4 is a cross-sectional explanatory view showing a state in which the sliding bearing for a rolling wheel according to the present invention is mounted on the rolling wheel.

[Explanation of symbols]

1 Sliding bearing 4 Flange surface 2 Base material 5 Notch 3 Lead bronze alloy

Claims (1)

[Scope of utility model registration request] 1. A plain bearing in which a flat steel base material obtained by sintering a lead bronze alloy on the surface is rolled into a cylindrical shape having the alloy inside and one end surface is formed on a flange surface for receiving a thrust load by pressing. In 1 to 1 or a plurality of parts, the length of which is substantially evenly divided, on one side end surface of the base material portion before processing which becomes the flange surface, and the depth is set to 1/3 to 3/3 of the flange surface height. A plain bearing having a notch.