JPH0218811Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a preload spacer for a spherical self-aligning thrust bearing that pivotally supports a shaft inserted into a shaft hole of a casing of various rotating equipment. be.

(Prior Art and its Problems) Conventionally, as shown in FIG. The inner flange 4 of the casing 3 has a bearing 6 sandwiched between the inner flange 4 of the casing 3 and a casing support member 5 disposed on one axial side (right side in the figure) of the inner flange 4 of the casing 3, which is inserted into the inner flange 4 of the casing 3. A spacer plate 7 is interposed between the spacer plate 7 and the member 5, and a preload spring 10 having appropriate elasticity is compressed in a hole 9 formed in the end surface 8 of one axial side of the inner peripheral flange 4. A preload spacer for a spherical self-aligning thrust bearing configured to press a plate 7 toward one side in the axial direction is known. According to this device, the spacer plate 7, the preload spring 10, and the inner periphery Flange 4
are independent parts and do not have any structure to hold these members 4, 7, 10 together, so the preload spring 10 may fall off when assembling the device, making assembly difficult. In addition, since there is no structure for preventing the rotation of the spacer plate 7, there is a fear that the spacer plate 7 may slip due to thrust fluctuations of the shaft 1 or the like.

In view of the above points, the present invention aims to eliminate the above problems in the prior art.

[Structure of the idea]

(Means for Solving the Problems) In order to achieve the above object, the preload spacer of the present invention has a head bored in the spacer plate on one end surface in the axial direction of the inner peripheral plate facing the spacer plate. A drive pin is fixedly and protrusively inserted into the engagement hole to prevent the spacer plate from falling off from the inner flange.

(Function) According to the preload spring having the above configuration, the drive pin prevents the spacer plate from accidentally falling off from the inner peripheral flange, and the spacer plate closes the opening of the hole into which the preload spring is inserted. Therefore, there is no risk of the preload spring falling off, and the drive pin also serves as a rotation prevention mechanism (drive mechanism) to prevent the spacer plate from slipping. However, the spacer plate is provided with some leeway to allow it to move in the axial direction so as not to impede the alignment operation caused by the elastic pressure applied to the bearing of the preload spring, which is the essential function of the device.

(Example) Hereinafter, one example of the preload spacer according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, a hole 9 into which a preload spring 10 is inserted is formed in the end surface 8 of one axial side of the inner flange 4 facing the spacer 7, and is disposed circumferentially with a predetermined number of internal threads. Holes 11 are provided, and drive pins 12 having male threads formed in the pillar portions 13 are screwed into each of the female screw holes 11 . Spacer plate 7
, corresponding to each drive pin 12, the corresponding pin 1
An engagement hole 15 is provided, which includes a recess 16 into which the head 14 of the pin 12 can be inserted, and a small-diameter through hole 17 through which the column 13 of the pin 12 is inserted.

When assembling the preload spacer with the above configuration, before assembling the inner flange 4 to the casing 3, the preload spring 10 is inserted into the hole 9, and the spacer plate 7 is inserted as if the hole 9 is covered. is attached to the inner peripheral flange 4 by a drive pin 12. At this time, the end face of the head 14 of the drive pin 12 and the recess of the engagement hole 15 are connected so that the spacer plate 7 can move somewhat in the axial direction during operation. 16 A slight gap S should be provided between the bottom wall and the bottom wall.

As described above, the preload spacer is configured such that the spacer plate 7 is attached to the end surface 8 of one axial side of the inner peripheral flange 4 by the drive pin 12, so that the preloading spring 10 is inserted into the hole. 9 is now closed by the spacer plate 7, and it is possible to prevent the preload spring 10 from falling out of the hole 9 during assembly. In addition, the drive pin 12 also functions as a drive mechanism for the spacer plate 7 with respect to the inner flange 4, and can prevent the plate 7 from slipping during operation.

[Effect of idea]

As explained above, the preload spacer of the present invention has the effect of preventing the preload spring from falling out during assembly, facilitating the assembly work, and preventing slip rotation of the spacer plate during operation. It is.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a preload spacer for a spherical self-aligning thrust bearing according to an embodiment of the present invention, and FIG. 2 is a half-cut sectional view of the conventional example. 1...Shaft, 2...Shaft side support member,
3...Casing, 4...Inner flange, 5...
Inner peripheral side support flange, 6...Bearing, 7...
Spacer plate, 8... End face on one side in the axial direction, 9...
... Hole, 10 ... Preload spring, 11 ... Female screw hole, 12 ... Drive pin, 13 ... Pillar part, 1
4...head, 15...engaging hole, 16...recess, 1
7...Through hole.

Claims (1)

[Scope of utility model registration request] A shaft-side support member that is diagonal to the axis of the shaft and is fixed to the outer periphery of the shaft, and a casing-side support member that is disposed on one axial side of the inner peripheral flange of the casing through which the shaft is inserted. A spacer plate is provided between the inner circumferential flange and the casing side support member, and a preload having appropriate elasticity is provided in a hole bored in one axial end surface of the inner circumferential flange. In the preload spacer for a spherical self-aligning thrust bearing, which presses the spacer plate toward one side in the axial direction by compressing a spring, the head is attached to the spacer plate on one end surface in the axial direction of the inner peripheral flange. A preload spacer for a spherical self-aligning thrust bearing, characterized in that a drive pin is protruded and fixed to be inserted into a drilled engagement hole to prevent the spacer plate from falling off from the inner peripheral flange.