JPH0332534Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a spindle insert used in spinning machines, threading machines, etc.

[Prior art] Conventionally, a cylindrical bearing case is mounted by fitting the fitting surface of the cylindrical bearing case into the opening of the inner peripheral surface of a cylindrical hole provided in a bolster, and the outer peripheral surface of this bearing case is axially outward from the bolster. It has a trunk circumferential surface located on the side. The barrel peripheral surface is connected to the fitting surface via a step and has a larger diameter than the fitting surface, and the step of the bearing case is positioned in contact with the end surface of the bolster. The neck bearing disposed on the inner peripheral surface of the bearing case is attached to the bearing case by crimping the upper part of the bearing case.

[Problems to be solved by the invention] Depending on the precision of flaws, roughness, roundness, etc. of the opening of the cylindrical hole or the fitting surface of the bearing case, the accuracy of the spindle disposed on the inner periphery of the neck bearing. During rotation, lubricating oil within the cylindrical hole may leak out of the bolster from between the opening of the cylindrical hole and the fitting surface of the bearing case due to centrifugal force. The leaked lubricating oil around the bolster will attract fluff and accumulate, which will hinder spinning, and the fluff will accumulate in the narrow gap between the bearing case and the worm attached to the spindle, causing the spindle to become damaged. The rotational torque of increases. Further, if the neck bearing is damaged, the bearing case to which the neck bearing is attached cannot be removed from the bolster, so the unit including the bolster must be discarded.

The object of this invention is to provide a spindle insert that does not hinder spinning, has low rotational torque, and can be used repeatedly as a bolster.

[Means for solving the problem] The fitting surface of the cylindrical bearing case is fitted into the opening of the inner peripheral surface of the cylindrical hole provided in the bolster.
The outer peripheral surface of this bearing case has a trunk peripheral surface located axially outward from the bolster. The barrel circumferential surface is connected to the fitting surface via a step and has a larger diameter than the fitting surface, and a neck bearing is attached to the inner circumferential surface of the bearing case. A pull-out ring is disposed between the stepped portion of the bearing case and the end face of the bolster, and the outer peripheral portion of the pull-out ring has a surface on the bolster side that is not in contact with the bolster. The pull-out ring is coated with an elastic member on a contact surface to the bearing case and a contact surface to the bolster.

[Operation] If the neck bearing is damaged, remove the spindle that is integrated with the warb from inside the bolster. Next, the outer peripheral surface of the pull-out ring on the bolster side is pressed in a direction away from the bolster, and the bearing case is separated from the bolster using the pull-out ring. Next, a pull-out ring is disposed on the fitting surface of another bearing case to which another neck bearing is attached, and in this state, the fitting surface of the bearing case is fitted into the opening of the bolster for installation. At this time, the pull-out ring contacts both the end face of the bolster and the step of the bearing case, and the bearing case is positioned with respect to the bolster. Next, the spindle with the warb is inserted into the neck bearing until the spindle contacts the step. Even if centrifugal force is generated in the lubricating oil in the bolster when the spindle rotates, the pull-out ring has an elastic member covering the contact surface to the bearing case and the contact surface to the bolster, so it has a sealing effect and the cylindrical shape Lubricating oil does not leak out of the bolster from between the opening of the hole and the fitting surface of the bearing case.

[Example] The opening 3 on the inner peripheral surface of the cylindrical hole provided in the bolster 1 is cylindrical and has a conical shape with a very slightly larger diameter on the opening side. The fitting surfaces 5 of the two are fitted and attached. The outer peripheral surface of the bearing case 7 has a trunk peripheral surface 9 located axially outward from the bolster 1, and this trunk peripheral surface 9 is connected to the fitting surface 5 via a step 10 and also
It has a larger diameter. A pull-out ring 12 made of metal and having a rectangular cross section is disposed between the stepped portion 10 of the bearing case and the end face 11 of the bolster, and the outer peripheral portion 13 of this pull-out ring is located on the side of the bolster as shown in FIG. Side 1
4 is not in contact with the bolster 1. The pull-out ring 12 is coated with an elastic member 15 made of rubber, synthetic resin, or the like on the contact surface to the bearing case 7 and the contact surface to the bolster 1, respectively. A neck bearing 16 is fitted into the inner diameter surface of the bearing case at a portion axially outward from the bolster 1, and this neck bearing 16 is used to tighten the upper part of the bearing case 7.
installed on. The neck bearing 16 is a cylindrical roller bearing, and the upper part of a spring tube 17 is fitted into the axially intermediate portion of the inner diameter surface of the bearing case 7. The spring tube 17 is separated from the bearing case 7 and the bolster 1 in the radial direction except for the upper part.
A spiral elongated hole 19 is provided in the axially intermediate portion of. A step 21 is attached to the lower part of the inner peripheral surface of the spring tube 17, and this step 21 constitutes a pivot bearing. Said cylindrical hole 2
A vibration absorber 25 made of a spiral plate member is disposed between the lower part of the inner peripheral surface of the spring tube 17 and the spring tube 17, and a sleeve-shaped spacer 27 is disposed between the vibration absorber 25 and the bearing case 7. has been done. Lubricating oil is placed inside and outside the spring tube 17 in the cylindrical hole 23, and a shaft-shaped spindle 29 is disposed on the inner periphery of the neck bearing 16. The spindle 29 is supported by the neck bearing 16 and the step 21, and although not shown, the spindle 29
A spindle driving workpiece 31 is attached to a portion above the bearing case 7.

In the illustrated embodiment, the upper and lower surfaces of the pull-out ring 12 are covered with elastic members 15, but
The entire surface of the pull-out ring 12 may be covered with an elastic member.

Further, the pull-out ring 12 may have a trapezoidal, spherical, oval, or other shape in cross section.

Furthermore, the step portion 10 of the bearing case and the end face 11 of the bolster may be flat, conical, spherical, or have other shapes.

Further, the bearing case 7 may be integrated with the spring tube 17.

[Effects of the invention] According to this invention, since the pull-out ring 12 is coated with the elastic member 15 on the contact surface with the bearing case 7 and the contact surface with the bolster 1, it has a sealing effect and the rotation of the spindle 29 is prevented. At this time, the lubricating oil in the cylindrical hole 23 does not leak out of the bolster 1 from between the opening 3 of the cylindrical hole and the fitting surface 5 of the bearing case due to centrifugal force. Therefore, there is no hindrance to spinning and the rotational torque is low. Further, even if the neck bearing 16 is damaged, the bearing case 7 can be removed from the bolster 1, so that the bolster 1 can be used repeatedly.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a spindle insert showing an embodiment of this invention, and FIG. 2 is an enlarged view of the area around the pull-out ring of the spindle insert shown in FIG. 1. In the figure, 1 is a bolster, 3 is an opening, 5 is a fitting surface, 7 is a bearing case, 9 is a body peripheral surface, 10 is a step,
11 is the end face of the bolster, 12 is the pull-out ring, 13
is the outer periphery of the pull-out ring, 14 is the surface on the bolster side,
15 is an elastic member, 16 is a neck bearing, and 23 is a cylindrical hole.

Claims (1)

[Claims for Utility Model Registration] 1. A cylindrical bearing case is installed by fitting the fitting surface of the cylindrical bearing case into the opening of the inner peripheral surface of a cylindrical hole provided in the bolster, and the outer peripheral surface of the bearing case is attached to the shaft from the bolster. The trunk peripheral surface is located outward in the direction, and the trunk peripheral surface is connected to the fitting surface through a step and has a larger diameter than the fitting surface, and a neck bearing is provided on the inner peripheral surface of the bearing case. In the spindle insert in which the above-mentioned pull-out ring is attached, a pull-out ring is disposed between the stepped portion of the bearing case and the end face of the bolster, and the outer circumference of the pull-out ring has a surface on the bolster side that is not in contact with the bolster, and the pull-out ring A spindle insert characterized in that a contact surface to a bearing case and a contact surface to a bolster are coated with an elastic member. 2. The spindle insert according to claim 1, wherein the entire surface of the pull-out ring is covered with an elastic member.